JB/T 8470-1996 Positive pressure dense phase pneumatic conveying system
Some standard content:
The Machinery Industry Standard of the People's Republic of China
JH/T 8470-96
Positive Pressure Dense Phase Pneumatic Conveying System
1996-09-03 Issued
Ministry of Machinery Industry of the People's Republic of China
197-0-41 Implementation
JB/T8470-96
The "General Terms" chapter in this standard mainly refers to the relevant works on chemical engineering and pneumatic conveying. The "Type and Cost Reduction Integrity" chapter of the vehicle standard mainly refers to the relevant technical parameters of the Ministry of Energy SDGJ11-SC thermal power generation, and the "East Design Standard for Small Gas Conveying System" chapter. We have made some adjustments to the basic single references on the flow beads and practical specifications in the hanging steam pipe specification in this standard according to the actual situation of the auxiliary recovery system, and also put forward specific index values for the quality requirements of the monitoring air. In the "Technical Conditions" chapter 4, except! In addition to referring to the S11-SC of the Ministry of Energy, based on the experience accumulated in the research of gas pressure relief systems in recent years, some requirements have been added to the standard, including technical requirements for the main components of the system, test methods, etc., and some requirements in S[G1- are tested. The S:! … 4.8.7 in the judgment, "the length of each horizontal pipe of the small gas pipe should not exceed 230m, and the joints should be compensated for pressure when arranged", considering the compensation amount of the extension joint selected in the system, this standard changes it to "when the amount exceeds 50n, it should not be extended or retracted." Appendix A, Appendix B and Appendix C of this standard are all appendices of the standard. This standard is initiated by the Mechanical Protection Standardization Technical Committee of the China Electrostatic Precipitator Technical Committee and is under the jurisdiction of this standard. The main personnel of this standard are Yang Hongbei, Hui Yushan, Da Bing'e, Mao Yuguang and Hu Nanshan. 1 Scope
Machinery Industry Standard of the People's Republic of China
Positive Pressure Dense Phase Pneumatic Conveying System
JR/T B47U - 06
This standard specifies the type and basic characteristics, technical requirements, test methods, installation, transportation and pipe requirements of the positive pressure dense phase fly ash pneumatic conveying system (hereinafter referred to as the conveying system). This standard is applicable to power plants with a single-stage conveying length of less than 100m and a vertical height of less than n (forget the machine temperature), which is not allowed to operate. 2 Reference standards
The provisions contained in the following standards shall become the provisions of this standard through reference in this standard. When this standard is issued, the version shown is valid, and all other standards will be revised. All parties to the technical standards should explore the possibility of using the latest version of the following standards. GE 985--88
Gas welding "arc welding and gas bed expansion welding weld glass and other forms of water size GB/T1330691 label
3 definition
The standard adopts the following definition,
3.1 concept definition
3.1.1 solid and gas flow
There are four phases of matter in the world (gas, body, shield, plasma), among which gas and body particles are immiscible in the corresponding flow, and the two-phase flow of gas (hereinafter referred to as gas two-phase flow) 3.1.2 Pneumatic transport system
uses compressed air to transport fly ash from the printing to the required equipment through a sealed pipe. 3.1.3 Positive pressure transport
In the pipe, the two flowing forces are high pressure and the dilute return air of the ambient atmosphere is positive pressure. 3.1.4 The ratio of the mass flow rate of the highest point of the fly ash to the air mass flow rate is the ratio of the mass flow rate of the air to the mass flow rate of the air. 3. 1.4.1 Average air ratio
The ratio of the average air quality of the air delivered during the entire delivery period to the average air quality during the period. 3.1.4.2 Delivery air ratio
The ratio of the semi-average air volume flow rate delivered during a given period to the average air quality during that period. 3.1.4.3 Condensation air ratio
The ratio of the delivered air quality at a certain time during the period to the air quality at the ground level. 3.1.4.4 Maximum instantaneous air pressure:
According to the Ministry of Industry and Information Technology 1096-09-03 standard
JR/T 847096
In the material, the mass flow rate of the material is high before the suction, the early flow rate of the warm room is the same as the quality of the air in the room,
3.1.5 The gas is transported evenly or the gas is less dense than the other transport gas. 3.6 Fluidization (also known as fluidization)
When the air flows upward from the bottom to the top of the material layer, the material layer is "boiling", and the flow is stable, which is called fluidization.
3.1.7 Positive pressure dense phase pneumatic system
Using this technology, the bulk material is in a static state. A type of pneumatic conveying system is called E. The pneumatic conveying system is a pneumatic conveying system, and the solids carried by the pneumatic conveyor are generally called positive pneumatic conveying systems. 3.25 Definition of quality
3. 2. 1 Light cup d,
indicates the size of dust. This standard refers specifically to the diameter of the sphere measured by output sedimentation (or centrifugal sedimentation). 3.2.2 Distribution of granularity
Distribution of granularity, expressed as a percentage: 3.2.3 The total volume of the granular material in the air flow, the air volume below the granular volume
3.2.4 External training coefficient
The ratio of the equivalent spherical surface area S to the surface area of the irregularly shaped particles S. TS
3.2.5 Fill density P
The volume of the granular material measured by the ash volume (excluding the pore volume within the particles and the volume between the particles). 3.2.6 Bulk density e! The double grid is filled with particles of such volume in a certain way, and the mass of the particles in the narrow container is divided by the volume of the container: 3.2.7 Angle of repose (also known as angle of repose)
The surface of the bulk pile is in a static state, and has a certain degree of contact with the horizontal surface. 3.2. Internal friction angle
The friction angle between the fly ash and the surface.
In this article:
: internal friction coefficient.
3.2.9 Friction between the wall and the wall.
Wall storage coefficient:
3.3 Definition of process efficiency
3. 3. 1 Special delivery ear G,--/h
The mass of the state delivered per unit time.
3.3.2 Delivery starting distance Lm
The length of the delivery pipeline from entry to exit. 3.3.3 Lifting height H (abbreviated as height m). 3.3.4 Head age. In the auxiliary temporary road, the sum of the number of heads is the sum of the number of heads. 3.4 Technical coefficient is the meaning. 3.4.1 Design conveying capacity (also known as the output of the parts G., 1/h). The mass flow rate determined by the design. 3.4.2 The appropriate length of the beltway L. JD/T8470-96 and various section accessories (elbows, valves, expansion pipes, reduction pipes, etc.) can produce the allowable length. 3.4.3 The appropriate length of the conveyor L. = +CH + L
Where 1·\-Total length of pipeline geometry: Total difference of auxiliary transmission, among which the ascending value is taken as the working position, and the upper sequence is taken as the negative value: The total amount of various types of items:
, "the length of the general type of cattle
standard bootstrap design coefficient. 0.2-15, diameter and current value. 3.4.4 Gas filtration
Low-phase flow gas is not transported or gradually.
3. 4. 5 Calculate the speed m
in the two cabinets, to calculate the movement speed of the whole group, 3.4. Critical wind speed! Also called economic speed
Under a certain ash-to-gas ratio, the air quality of the reverse conveying pipe is the minimum air quality when the material is transported. 3.1.7 Condition reduction is called the maximum air delivery speed
The problem is subject to the force, the single force, the three-way method, the product when the three forces are balanced, 3.8 Long. Haihe Wenke!
The equilibrium overflow of the ash and air mixture,
3.4.9 Critical bearing
The maximum allowable air output or the mother air flow violation without blocking. 3.5 Dynamic cleaning definition
1.5.1 Unit air consumption Nm
The air volume consumed by the standard reward point for light delivery of a ton of flying head, 3. 5. 2 Ton of air volume, Nm*/ir -m) transported goods, the amount of gas consumed per meter of length, 3.5.3 Unit output power V.kW./1
Amount of goods
3.5.4 Power coefficient K<(tons·meter electricity), kw./(tn) per ton of electricity. Power consumption per meter of transport,
3.5.5 System power V.kW
N=Qp/100m
Formula: Q is the net air flow rate in m/
.—The total air flow rate of the system.
3. Kinetic energy and its setting parameters 3
JR/T8470-96
The maximum value of two consecutive feeds in the same warehouse, determined by the adjacent feed time, is the sum of the feed time and the dynamic time. 3.6.2 Feed time
The time required from the feed opening to the feed closing. 3.3 When the material is in fluidized state, the time required for the air in the pump to reach the set pressure, and the time required for the air in the pump to reach the set pressure. 3.6. Before delivery, the time required for the pump to drop to the set water-free level after half of the material is discharged. 3.6.5 Secondary sweep time, the time required to clear the filter residue in the pipeline, that is, the time required to release the set pressure after the set low pressure is released. 3.6.6 Alarm, if the set delivery time is reached and the pressure inside the tank has not dropped to the set low pressure during the delivery process, an alarm will be issued.
3.6.7 Pressure alarm
When the pressure in the system has reached the set lower pressure, the pressure alarm will be issued.
3.f.8 Dangerous material level drop alarm, etc.
When the material level indicator light flashes negatively, an alarm will be issued to indicate that the material level has dropped. 3.6.9 General alarm
Pipe blockage alarm, pressure alarm, material level fault alarm, both of which will be issued at the same time. 3.6.10 Underpressure alarm
When the pressure of the gas storage is lower than the minimum pressure required for normal delivery, an alarm will be issued. The word underpressure alarm, 3.6.1
When the pressure in the central equipment or the control system or the pipeline is temporarily interrupted due to a failure, it is called a failure. 3.6.12 Electric field priority
Delivery priority · System delivery priority level selection, determine which pump to deliver first, 3.6.13 Set high pressure
Open the outlet network when the warehouse spring setting! , 3.6.14 Select the pressure
Delivery ends, purge at the beginning of the corresponding period of time. Type and basic parameters
4.1 Type
4.1.1 The pneumatic system consists of a mechanical part and an electrical thermal control part. 4.1.2 The mechanical part refers to the gas source, fluidized bed conveyor and pipeline. 41.2. The air source is based on the air service machine and is equipped with the main air purification equipment. 4.1.2.2 The fluidized bed conveyor has a simplified body, inlet valve and fluidized bed assembly. 4.1.2. The pipeline must have concave material, secondary pipe, European cleaning device, auxiliary grinding elbow, extension joint, etc. 4.1.3 The air thermal control part consists of a program controller, a door control box, a power distribution plan control unit and other control devices. 4. 1.4 Fluidized conveyor specifications 1. Specifications
TE!onD
TR155G
TR2C0C
TR2500
TR4000
TRE5CS
TR15C00
Model indication method
JB/T8470-96
Geometric length of transmission pipeline, 1m
System output, c/h
-Positive industry gas hose Beijing code
Public authority
Example: P15 means positive pressure pneumatic weak ash system, system goods; 2Ct/h, my pipe length 5 you 10m. 4.2 Reference to the whole book
4.2.1 Design of turbine delivery capacity. t/
2) When the delivery system is used, G, = 1.2, h to calculate the total amount of the pool input, =,
The center is the required capacity of the system, 4.2.2 Test carbon pipeline equivalent length L+m
L=L+GH+L
In the formula: upper
The total length of the test pipeline,
The total vertical deviation, where the rise is taken as a positive value, and the lower is taken as a negative value, the number of various pipeline parts:
The equivalent length of various pipeline accessories, m,
——vertical length calculation coefficient, C-0.2--2.5, when the cold diameter is large and the pressure is large, take the larger one. 4.2.3 Selection of gas-gas ratio A
*, =Gn/G.
Where:
-designed gas plate 1/,
selected according to the existing length or experience
4.3.4 Output of double pump system 1/h
JB/T8470
Formula, 9——Material filling efficiency. The upper limit can be taken as 0.81. The lower limit can be adjusted as needed: P: · Coal bulk density:
t——Time required for blowing ash, min
t:——Power rise time (i.e. pressure rise time) time), in:.
Warehouse pump geometric volume·m,
4.2.5 Rate system average air energy consumption 9.mm/9
4.2.6 Air compressor penetration and standby ratio number
) The flow rate of the air compressor is selected according to (135~14)% of the sleeping value air consumption:) The air compressor outlet volume is taken according to the formula:
Where: One front pipe full input warehouse loss
-one net positive small loss.Pa
Air outlet air Pa
Less high margin system plastic some 1. 2.
Note: Stock selection port 0.F--L,BMPa (A) center》Number of spare units
One unit in operation, one spare unit in operation, two or more spare units, 4.27: The air flow velocity of the compressed air pipeline is = (15--20) m/5. 4.2. After purification, the pressure varies with the quality requirements of the air:) card book 5,%;
6) containing the largest wheel diameter 0.12
) cloud water rate, pressure point 1.6℃:
4.2.9 Delivery speed (ash conveying pipe protruding air flow details) a) initial section = (5~15>m/select (regular operating conditions change):: section m selection (depending on the length of the pipeline and the number of people gradually avoid). 4.2.1 m blowing time to t, - belt current report standard (5 ~ -20). The fire belt is long, the quality is bad, this selection is the core 4.2.11 The back pressure of the reservoir is selected as U.003 ~ U.05MPa. The original data of the original data provided by the manufacturer is shown in Appendix A (the correct appendix). 6 Technical requirements
.1 Overall technical requirements
6.1. "Under the design conditions, the average output of the system should be able to meet the requirements: the output reserve rate is 10C (when the system is fully supplied) or 20 when the system is fully supplied) The output of the standby pump should not be less than the required output for the next year 6.1.2 The continuous operation time of the system should be not less than 60Cl. 6.1.3 The ash-to-gas ratio of the system should not be less than 2C (or not less than the requirement). 6.1.4 The unit power consumption K of the system should be 0.02kW·h/(1-M). 6.2 The control requirements of each part of the system are detailed in the library B (standard catalog), 6.3 The production and installation requirements of auxiliary pipelines are detailed in the appendix C (standard indication). 6
Performance test
7. Determination of the exhaust ratio of the pneumatic ash feeding system
7. 1. 1 Determination of the exhaust ratio of the pneumatic ash feeding system
JEI/T8470-96
Use the measurement of the mass center of the silo system by the flow meter method, and then determine the mass center of the air pump for feeding a certain period of time, so as to calculate the ash gas of the ash feeding system based on the formula (6),
(kux/kg()
7. 1.2 Determination method
7. 1. 2. 1 The device is shown in Figure 1. The figure shows the actual test device. 7. 1. 2. 2 Determination of the air flow pattern The air flow is measured on a flat surface with a door or a head. The upstream is the height of the six-section section. The downstream should be twice the normal air diameter. 7. 1. 2. 3 Determination of non-agglomerated
T.1.2.3.1 The bulk density of the gas in the outlet is calculated by formula (7) (unit)
G, Worit
7.1.2.3.2 According to the quality table shown in Figure 1, the dynamic pressure and static pressure of the air in front of the outlet of the warehouse are measured, and the static pressure of the air is measured. The static pressure of the air in front of the warehouse is measured, and the static pressure of the air in the outlet is measured. The static pressure of the air in the outlet is measured by formula (10) and formula (11) to calculate the intercepted flow Q of the outlet of the test point and the remaining amount of the inspection warehouse. The air center of the measuring point is the air certificate of the room. The air flow rate Q of the measuring point is: the air flow rate Q of the measuring point under the condition of the external working part, the air flow rate Q of the measuring point under the condition of the external working part ...m/s Where: F
The residual volume of air at the point m.
JB/T847096
c) The required air quality G., kgG = Q2
The time of the new warehouse system. ". 7.1.3 East gas ratio meter
Connect or () calculation.
, 2 life East through the operation performance line and the side of the certificate please measure 1. 2. Test the giant
, the length of the transmission line, there is a dust collector running T said, through the variable pressure detection, clear the actual adjustment of the total pre-call time adjustment section, the air warehouse case a price system maximum output near the false reference value, 7.2.7 over the construction and process curve schematic return
7. 2. 2. 1 The process line is shown in Figure 2.
, density, pressure,! : After the penetration time:, external pressure, fluidization time: transfer time, general steam, time after
Figure 2 I curve
7.2.2.2 When the gas discharge stops at the lower layer, the gas intake time and the upper layer time: 7.2.2.3 Determine the visual
a) Record the cycle time s: b) Record the empty height and empty volume V., mlc) The increase of dust density a.hgm,
d) Record the warehouse case,, Pa:
) System filling system
7. 2. 3 Calculation
..3 [Actual input base h technical calculation
7.2.3.2 output value, according to the support (13) let w4.9
after various means of adjustment, the harm reaches the most human value: (.2)
, this minimum value
JB/T 8470-96
you as the unit to let the system in the actual standard auxiliary ash number of the nearest dummy output. 7.3 East total energy consumption and total gas overload method T.3. 1 Non-installed schematic diagram 3,
7.3.2 Determination method
7.3.2.1 Measurement range
When the variable:
Figure 3 measurement device
From the end of the top pipe of the whole Xiangren Sanchuang Dongku, the power consumed and the gas consumption are based. 7.3.2.2 The system is running stably.
7.3.2.3 Test position
At the point of the reverse air pipe, use the system flow meter and the thermometer to measure the amount of new air consumed by the pump and the temperature of the air entering the pump. In the middle, use the pressure P and the pressure gauge P to measure the pressure of the gray pipe and the gray pipe respectively. 7.3.2.4 Test sequence: The overall system is running normally and the test is started only after the system is set. (1.1) ..2.3.2 The color pump is sent to the gas disk or the fog meter to measure the flow rate of the air in the delivery warehouse. (e) At the same time, record the pressure of the scale P. (d) Record the temperature of the two warehouses of the delivery channel. (d) Record the working conditions of the double warehouse pump, measure the ratio of the color of the pile to the color of the household, and then calculate the efficiency of the system according to the amount of the warehouse pump. (e) Record the time of this new time: including the fluidization time and the delivery time). 7.3.3 Calculation formula
7.3.3.1 + meter air gm/·km
In: Q-
JB/T8470:96
The air released by a delivery is:
W——The mass of the air, k+
The length of the delivery, m
The volume of air, 1/F1
——The time to deliver a full load, 5m-3 mass flow, k/s.
7.3.3.2 Pure + meter power commercial K\.kw-b/t·m) K
In the formula: 一一The input is! 8. The label shall be fixed on the body of the product and fixed in the production line. 8.1 The label shall indicate the following: a) product name, model, specification, technical specification, product number, d) export date, e) manufacturing name, 8.3 The form and size of the label shall comply with the provisions of CB/T13306. 9 Packaging and transportation auxiliary equipment
9.1 All electrical components: (assembled and meet the following requirements:) Railway and highway transportation requirements are as follows: 》Controller, control device, double pressure gauge, single piece must be corrected with plastic material to prevent deformation, and then the whole should be covered with plastic film: d) The box should be fixed and shipped.
9.2 Check the material, lubricate the material, check the pipe, and send the flange to the sheath rack, and meet the following requirements:) "No more than two boxes!
More than one piece of installed parts is fixed to this degree of damage:! Solid plastic film to prevent being restrained.
3 Forget ordinary elbows and other bundles,
9.4 The installation and installation parts should have text marking symbols, which should include:) Receiving unit and judgment station:
5) Machine name and specification, double medical number and serial number: new number. External case size, net weight, shipping mark, starting position mark: d) City manufacturer and issuing station:
9.S key pin technology production
: Packing list and shipping list:2 pure + meter power commercial state K\.kw-b/t·m) K
In the formula: one by one! To the input Dongpu Le code pressure bottle light, 8 signs
8. The body of the connection should be fixed with a layer of warehouse marking, and the system marking should be fixed in the production hall. 8.1 The label should indicate the following:
) Product name, model, specification:
b) Technical specification:
Mountain number:
d) Export date,
e! Manufacturing name,
8.3 The form and size of the label shall comply with the provisions of CB/T13306. 9 Packaging and transportation auxiliary equipment
9.1 All electrical components: (assembled and meet the following requirements:) Railway and highway transportation requirements are as follows: 》Controller, control device, double pressure gauge, single piece must be corrected with plastic material to prevent deformation, and then the whole should be covered with plastic film: d) The box should be fixed and shipped.
9.2 Check the material, lubricate the material, check the pipe, and send the flange to the sheath rack, and meet the following requirements:) "No more than two boxes!
More than one piece of installed parts is fixed to this degree of damage:! Solid plastic film to prevent being restrained.
3 Forget ordinary elbows and other bundles,
9.4 The installation and installation parts should have text marking symbols, which should include:) Receiving unit and judgment station:
5) Machine name and specification, double medical number and serial number: new number. External case size, net weight, shipping mark, starting position mark: d) City manufacturer and issuing station:
9.S key pin technology production bzxz.net
: Packing list and shipping list:2 pure + meter power commercial state K\.kw-b/t·m) K
In the formula: one by one! To the input Dongpu Le code pressure bottle light, 8 signs
8. The body of the connection should be fixed with a layer of warehouse marking, and the system marking should be fixed in the production hall. 8.1 The label should indicate the following:
) Product name, model, specification:
b) Technical specification:
Mountain number:
d) Export date,
e! Manufacturing name,
8.3 The form and size of the label shall comply with the provisions of CB/T13306. 9 Packaging and transportation auxiliary equipment
9.1 All electrical components: (assembled and meet the following requirements:) Railway and highway transportation requirements are as follows: 》Controller, control device, double pressure gauge, single piece must be corrected with plastic material to prevent deformation, and then the whole should be covered with plastic film: d) The box should be fixed and shipped.
9.2 Check the material, lubricate the material, check the pipe, and send the flange to the sheath rack, and meet the following requirements:) "No more than two boxes!
More than one piece of installed parts is fixed to this degree of damage:! Solid plastic film to prevent being restrained.
3 Forget ordinary elbows and other bundles,
9.4 The installation and installation parts should have text marking symbols, which should include:) Receiving unit and judgment station:
5) Machine name and specification, double medical number and serial number: new number. External case size, net weight, shipping mark, starting position mark: d) City manufacturer and issuing station:
9.S key pin technology production
: Packing list and shipping list:
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