QB/T 1829-1993 Single-effect external circulation tube-type vacuum evaporator
Some standard content:
Light Industry Standard of the People's Republic of China
Single-effect external circulation tube-type vacuum evaporator
Subject content and scope of application
QB/T 1829—1993
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of single-effect external circulation tube-type vacuum evaporators.
This standard applies to single-effect external circulation tube-type vacuum evaporators (hereinafter referred to as "evaporators") used in the dairy, pharmaceutical and other industries. 2 Reference standards
GB150 Steel pressure vessels
GB151 Steel shell and tube heat exchangers
GB/T191 Pictorial symbols for packaging, storage and transportation
GB/T14253 General technical conditions for light industrial machinery JB/T302 Classification of casting defect names
General technical conditions for packaging of electromechanical products
JB/T2759
QB/T 1588. 4 Cars
General technical conditions for painting of light industrial machinery
QB/T 1823#
Dairy machinery model compilation method
ZBJ500043
Determination of sound pressure level of metal cutting machine tools 3 Product classification
3.1 According to whether it has a steam compression device, it can be divided into: a. Evaporator without steam compression device,
b. Evaporator with steam compression device.
3.2 According to the amount of water evaporation, it can be divided into:
300kg/h evaporator,
700kg/h evaporator,
1000kg/h evaporator.
3.3 The product code is marked as follows according to QB/T1823: R
N LG 01(03) -
Main parameters (evaporation capacity)
Type code (03 for those with steam compression device)Characteristic code (LG: tube)
Classification code (N: Concentration)
Major category code (R: Dairy machinery)
3.4 The main technical parameters are shown in the table below.
Approved by the Ministry of Light Industry of the People's Republic of China on July 29, 1993
Implementation on March 1, 1994
Water evaporation/kg/h
Using steam pressure/MPa
Vacuum degree/kPa
Evaporation consumption/kg/kgEvaporator
Cooling water consumption/(kg/kgEvaporation
Inlet water 15℃
Outlet water 40℃
4Technical requirements
QB/T1829—1993
Without steam compression device
With steam compression device
RNLG03-700RNLG03-1 000
RNLG01-300RNLG01-700RNLG01-1000RNLG03-300≥300
≥700
0.05~0.12
≥1000
≥300
85. 0~90. 7
4.1 Products shall comply with the requirements of this standard and be manufactured in accordance with drawings and technical documents approved by the prescribed procedures>700
0.55~0.65
≥1000
4.2 All purchased parts and raw materials shall have the inspection certificate or quality assurance certificate of the supplier, otherwise the manufacturer shall inspect the purchased parts and raw materials and only those that meet the requirements shall be adopted.
4.3 The basic technical requirements of the whole product shall comply with the provisions of GB/T14253. 4.4 The noise level of the product during normal operation shall not exceed 85dB(A). 4.5 The overall insulation resistance shall not be less than 2MO.
4.6 When the equipment runs empty and the vacuum degree reaches 90.7kPa, it shall stop running. The vacuum degree shall not drop by more than 6.7kPa within 30 minutes. 4.7 The casting shall not have various defects that affect the strength and other properties of the casting as specified in JB/T302. The molding sand, burrs, pouring risers, etc. on the surface and inner cavity of the casting shall be cleaned.
4.8 The parts in contact with the material shall be Made of materials that meet food hygiene requirements. The product should be easy to clean and disinfect. The pipes should be as few bends as possible, with no blind ends and no right angles. 4.9 The surface in contact with the material, the surface roughness R. The value is not greater than 1.6um, and no obvious unevenness, black spots, burns and scratches are allowed. The polished surface should have neat and beautiful lines. 4.10 The metal coating on the surface of the parts should not fall off, darken, be rough and uneven, and the surface should be bright. The paint should comply with the provisions of QB/T1588.4. 4.11|| tt||4.12 Requirements for manufacturing of main parts and componentswww.bzxz.net
4.12.1 The manufacture of heaters and evaporation chambers shall comply with the provisions of GB150 and GB151. 4.12.2 After the manufacture of heaters and evaporation chambers is completed, pressure tests and tightness tests shall be carried out. a.
Pressure test;
The material circulation part of the heater shall be subjected to a pressure test of 0.15MPa, the steam heating part of the heater shall be subjected to a pressure test of 0.3MPa, and the evaporation chamber shall be subjected to a pressure test of 0.15MPa. 4.13 After all valve components are assembled, a 0.15MPa water pressure test shall be carried out, and the pressure shall be maintained for 5 minutes without leakage. 4.14 Hot press pump
4.14.1 The nozzle of the hot press pump shall be made of materials with a hardness of not less than HRC50 after heat treatment. 4.14.2 Measures shall be taken to prevent movement and reduce noise during the manufacture and installation of the hot press pump. 4.15 The suction range of the discharge milk pump shall not be less than 7m water column. 5 Test method
5.1 Water evaporation
Use a Baume meter or a hydrometer to measure the concentration (solid content) of milk before and after concentration, and calculate the water evaporation according to formula (1): 370
Standard search network ww.bzsoso
American standard industry data download
Where: W. — water evaporation, kg/h; QB/T 1829—1993
S——amount of milk concentrated per unit time, kg/h; B1~—concentration of milk before concentration, %; B2—concentration of milk after concentration, %.
5.2 Steam consumption
（1）
Install a steam flowmeter on the product main steam inlet pipeline to measure the steam inlet per unit time (if the conditions for installing a steam flowmeter are not met, the condensate weighing method is allowed to measure the steam consumption per unit time). Compare it with the evaporation amount in the corresponding time, and the steam consumption is: .D
Where: D-—steam consumption, kg/kg evaporated water; Dr—steam consumption per unit time, kg/h; W.—water evaporation, kg/h.
5.3 Cooling water consumption
（2）)
Use a flowmeter on the cooling water replenishment pipe to measure the cooling water consumption per unit time, and then compare it with the water evaporation amount in the corresponding time. The measurement should be carried out under the conditions of inlet water temperature of 15℃ and outlet water temperature of 40℃. If it is not under this condition, the inlet water volume should be adjusted to stabilize the outlet water temperature at a value close to 40℃. Then convert the measured cooling water consumption into the cooling water consumption under this condition according to formula (3): W(T-Th)
(40℃-15℃)W
-Cooling water consumption, kg/kg evaporated water;
W-
-Measured water consumption, kg/h;
T--Water outlet temperature at measurement, ℃;
T.--Water inlet temperature at measurement, ℃;
W. Evaporation of water, kg/h.
5.4 Noise
Measure according to the provisions of ZBJ50004.
5.5The tests of 5.1 to 5.4 should be carried out when the product is operating normally. 5.6 Insulation resistance
Measure between the motor outlet terminal and the housing with a 500V megohmmeter. 5.7 For the test of Article 4.6
Close all the connection ports, start the hydraulic ejector to evacuate to above 90.7kPa, then shut down the hydraulic ejector and observe the vacuum gauge. 5.8 For the tests of Articles 4.7 to 4.10
Use visual inspection.
5.9 Paint
The paint surface shall be inspected in accordance with the provisions of QB/T1588.4. 5.10 For the test of Article 4.12.1
The manufacture of heaters and evaporators shall be inspected in accordance with the corresponding provisions of GB150 and GB151. 5.11 For the test of Article 4.12.2
5.11.1 The pressure test of heaters and evaporators shall be carried out in accordance with the provisions of Article 10.9.4 of GB150, and the test liquid shall be water. 5.11.2 The tightness test of heaters and evaporators shall be carried out in accordance with Article 10.9.6 of GB150.2, namely, kerosene leakage test. Kerosene leakage test: clean the side of the weld that can be inspected, apply white powder slurry, dry it, and then apply kerosene on the other side of the weld to make the surface sufficiently wetted. After 30 minutes, if there is no oil stain on the white powder, it is qualified. 371
Quasi-hot solid network
6 Inspection rules
Inspection is divided into factory inspection and type inspection.
6.1 Factory inspection
QB/T1829-1993
Factory inspection must be carried out before the product leaves the factory. Each batch of products shall be inspected one by one according to the product drawings, technical documents approved by the prescribed procedures and the requirements of 4.5, 4.7 to 4.11, and the product manufacturing, assembly, appearance, safety and health, and nameplate, etc. shall be inspected. 6.1.3 Products can only leave the factory after passing the inspection, and they shall be accompanied by documents proving the quality of the products. 6.2
Type inspection
Type inspection should be carried out in any of the following situations. a.
Product trial production is completed or the product is transferred to the factory for trial production and identification; after formal production, if there are major changes in structure, materials, and processes that may affect product performance, it should be carried out every three years during normal production;
When the product is suspended for a long time and production is resumed, the national quality supervision agency proposes a type inspection. 6.2.2 Type inspection should be carried out on one unit randomly selected from the products that have passed the factory inspection, and it should comply with the main technical parameters in Article 3.4 and the technical requirements in Chapter 4 of this standard. If there is one serious defect, the batch of products is considered unqualified. 7 Marking, packaging, transportation and storage
7.1 Marking
7.1.1 Product marking
Product marking includes:
Manufacturer’s name,
Product name,
Product model,
Manufacturing date;
Main product parameters;
Motor model and power,
Total weight of equipment.
Packaging Marks
7. 1. 2. 1
The packaging box should have clear and neat markings that are not blurred due to long-term transportation and storage, including: manufacturer name,
product model, name and quantity:
factory number and box number:
box size (length×width×height) and gross weight; name and address of the consignee;
"Handle with care", "Lifting instructions", "Upward" and packaging year and month and other words and marks. 7.1.2.2 Packaging marks should comply with the provisions of GB/T191. 7.2 Packaging
Product packaging should comply with the provisions of JB/T2759. 7.2. 1
Each product shall be provided with the following documents: 7.2.2
Instruction manual,
Product certificate;
Standard material and labor cost
Packing list.
The above documents shall be packed in moisture-proof bags.
7.3 Transportation and storage
7.3.1The product shall not be collided during transportation. QB/T1829-1993
7.3.2The equipment shall be stored in a clean and dry warehouse and shall be avoided from coexistence with chlorides. 8 Quality assurance
Under the condition that the user complies with the storage and use rules, within twelve months from the date of shipment from the manufacturer to the user, if the product is damaged or cannot work normally due to poor manufacturing quality, the manufacturer shall replace parts and repair the product for the user free of charge. Additional Notes:
This standard was proposed by the Technical Equipment Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Dairy Machinery Standardization Center. This standard was drafted by Shanghai Qianwei Machinery Factory. The main drafters of this standard are Wang Wufang and Shi Lianguan. From the date of implementation of this standard, the professional standard ZB/TY99026-1989 "Single-effect external circulation tube-type vacuum evaporator" issued by the former Ministry of Light Industry will be invalid.
Standard price list
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.