This standard specifies the structural type and basic parameters, technical requirements, test methods, inspection rules and packaging, transportation, storage and other requirements of vacuum scraped film drum evaporators. This standard is applicable to vacuum scraped film drum evaporators that use superheated steam or mechanical oil as heating medium. JB/T 5972-1992 Vacuum scraped film drum evaporator JB/T5972-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T5972—92
Vacuum Scraped Film Drum Evaporator
Published on July 20, 1992
Implementation of the Ministry of Machinery and Electronics Industry of the People's Republic of China on January 1, 1993
The People's Republic of China
Mechanical Industry Standard
Vacuum Scraped Film Drum Evaporator
JB/T5972—92
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry Printed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (P.O. Box 8144, Beijing 100081)
Copyright
No reproduction
Format 880×1230
First edition in October 1992
Sheet 5/8 Word count 12000
First printing in October 1992
Print run 0.001-500
Price 1.50 yuan
Mechanical Industry Standard of the People's Republic of China
Vacuum scraped film drum evaporator
1 Subject content and scope of application
JB/T597292
This standard specifies the structural type and basic parameters, technical requirements, test methods, inspection rules and packaging, transportation, storage and other requirements of vacuum scraped film drum evaporator.
This standard applies to vacuum scraped film drum evaporator (hereinafter referred to as evaporator) with superheated steam or machine oil as heating medium. 2 Reference standards
GB6388
GB/T13306
GB/T13384
JB/T5973
SJ2573
3 Terms
3.1 Evaporation chamber
Packaging storage and transportation indication
Vacuum flange nominal diameter
Vacuum flange connection type
Product packaging delivery and receipt mark
General technical conditions for packaging of electromechanical products
Determination of sound power level of dryer noise
Simplified method
General technical conditions for coating
Space for secondary vaporization of solution under boiling state. 3.2 Volume evaporation intensity P.
Under the specified test conditions, the weight of water evaporated per unit time and per unit evaporation chamber volume, in kg/(hm): 3.3 Leakage rate Q
Under the specified test conditions, the amount of gas leaked from the evaporation chamber per unit time, in Pam\/s. 4 Type and basic parameters
4.1 Structural type
4.1.1 The evaporator is horizontal.
4.1.2 The main engine consists of a cylinder, a reducer and a support part. 4.1.3
: The nominal diameter of the vacuum flange of the evaporator and the connection type of the vacuum flange shall comply with the provisions of GB6070.1 and GB6070.2 respectively.
Model representation method
Representation method
Approved by the Ministry of Machinery and Electronics Industry on July 20, 1992 and implemented on January 1, 1993
4.2.2 Model example
JB/T5972-92
Heat transfer area of ​​evaporator, mbZxz.net
The first capital letter of the Chinese phonetic symbol for "true" in "vacuum" is Z, the first capital letter of the Chinese phonetic symbol for "scrape film" is G, the first capital letter of the Chinese phonetic symbol for "concentrate" is N. The vacuum scraped film rotary drum evaporator with a heat transfer area of ​​6m2 is marked as: NGZ-6.4.3 Basic parameters
The basic parameters of the evaporator shall comply with the provisions of Table 1. Table 1
Evaporation chamber
NGZ-12
NGZ-18
Technical requirements
Volume evaporation
kg/(h'm*)
Evaporation chamber
Ultimate pressure
Gas leakage rate
Pa-m'/s
5.1 The product shall comply with the requirements of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 5.2 Structural requirements
The evaporator shall have good thermal insulation measures. 5.3 Appearance quality
Noise sound power level
The appearance quality of the evaporator coating shall comply with SJ2573 Section 1. 3.1 Requirements for the appearance quality of Class II coating. 5.4 No-load technical performance
The main engine noise when the evaporator is running idle shall comply with the provisions of Table 1. The surface temperature rise of the motor should not exceed 20°C after the evaporator runs for 2 hours. When the ambient temperature is not higher than 40°C, the minimum evaporation temperature of the evaporator shall not be higher than 15°C. The ultimate pressure of the evaporation chamber shall comply with the provisions of Table 1. The leakage rate of the evaporation chamber shall comply with the provisions of Table 1. 5.5 Load technical performance
When the evaporator is tested for evaporation performance with softened water, the volumetric evaporation intensity of the evaporator shall comply with the provisions of Table 1. 5.6 Reliability
The reliability index shall be implemented in accordance with the evaporator reliability assessment specifications. 6 Test method
Equipped motor
JB/T5972-92
6.1 Coating Appearance quality shall be inspected in accordance with the provisions of Articles 2.4.2, 2.5 and 2.6 of SJ2573. 6.2 Noise shall be measured in accordance with the method specified in JB/T5973. 6.3 The surface temperature rise of the motor shall be measured with a semiconductor thermometer with an error of ±1°C under the condition that 245kg of water is added to the evaporation chamber per cubic meter of volume.
6.4 The evaporation temperature shall be measured with a mercury thermometer with an error of ±0.5°C when 245kg of softened water is added to the evaporation chamber per cubic meter of volume and the evaporation chamber reaches the ultimate pressure in a static state. 6.5 The ultimate pressure of the evaporation chamber shall be measured under no-load static conditions, and the evaporator shall be placed in the working system, and measured with a pressure measuring instrument with an accuracy within the range of ±5%.
6.6 The leakage rate of the evaporation chamber shall be tested in accordance with the provisions of Appendix A (Supplement). 6.7 The volume evaporation intensity shall be tested in accordance with the provisions of Appendix B (Supplement). 6.8 The reliability test of the evaporator shall be carried out by the manufacturer through the laboratory or at the experimental point established by the user, and a test report shall be submitted. 7 Inspection rules
The evaporator must be inspected and qualified by the technical inspection department of the manufacturer and accompanied by a product quality certificate before it can be shipped. 7.1
7.2 The inspection of evaporators is divided into factory inspection and type inspection. 7.2.1 Factory inspection
7.2.1.1 Each evaporator shall be tested for no-load operation for no less than 2 hours, and the requirements of 5.3 and 5.4.1 shall be inspected. 7.2.1.2
If any of the factory inspection items fails, the evaporator shall be a defective product. 7.2.2
Type inspection
Type inspection shall be carried out when any of the following conditions are met: new products to be trial-produced;
when the product is produced again after being discontinued for two years;
when the normal continuous cumulative production is 100 units (referring to the same specifications); when the product is transferred to another factory for production;
when there are major changes in the product manufacturing process or the materials used, which affect the product quality. The prototype for type inspection shall be randomly selected from the finished product warehouse of the manufacturer. In addition to the items of factory inspection, the type inspection shall also be inspected in accordance with the requirements of 5.4.25.4.5 and 5.5. Supply quality assurance
If the user complies with the storage and use rules of the evaporator, within one year from the date of shipment from the manufacturer and the use time does not exceed half a year, if the product cannot work normally due to poor manufacturing quality, the manufacturer shall replace or repair it for the user free of charge (except for wearing parts). 9 Marking, packaging, transportation, storage
9.1 Marking
9.1.1 Product marking
Each evaporator shall be fixed with a product nameplate in a conspicuous place. Its type, size and technical requirements shall comply with the provisions of GB/T13306. The content shall include:
Manufacturer name:
b. Product name and model;
c. Manufacturing date;
d. Product factory number.
9.1.2 Packaging marking
The packaging material of the evaporator shall be marked with signs such as receiving and delivering, packaging, storage and transportation, etc. The marking shall comply with the provisions of GB6388 and GB191.
9.2 Packaging
JB/T5972-92
9.2.1The evaporator shall be packed in boxes, and the evaporator packaging shall comply with the provisions of GB/T13384. 9.2.2 Documents accompanying the evaporator should include:
Product certificate;
Product instruction manual (including product installation diagram); b.
Packing list (including random spare parts and tool list). 9.3 Purchase and storage
When storing in the open air, a canopy should be provided or other rainproof measures should be taken. If the storage time exceeds 18 months, maintenance should be carried out. A1 Test instruments
JB/T597292
Appendix A
Test method for air leakage rate of vacuum scraped film drum evaporator (supplement)
Pressure measurement shall be carried out with a pressure measuring instrument with an accuracy within the range of ±5%. A2 Test conditions and test methods
When the evaporator is in no-load static conditions, continue to pump air for 1 hour after the limit pressure is reached in the evaporation chamber, close all vacuum valves, stop the vacuum pump, and wait until the pressure in the evaporation chamber rises to p: value p:=11325Pa). After a period of time △t (△t=1800s), measure the pressure p in the evaporation chamber: ·
A3 Calculation of the leakage rate of the evaporation chamber
Q=(p:p)y
Wherein: Q
Evaporation chamber leakage rate, Pa-m/s;
Close valve The pressure value recorded when the door is opened is specified as p, = 11325Pa; the pressure in the evaporation chamber after time At from p, Pa; P.
△t—the time taken for the pressure in the evaporation chamber to rise from p to p, taken as 1800s; V—the volume in the evaporation chamber, m.
B1 Test instruments
JB/T5972—92
Appendix B
Test method for volume evaporation intensity of vacuum scraped film drum evaporator (supplement)
The weight of the material is measured with a platform scale with an accuracy of not less than Class 2. B2 Test conditions
The material is softened water.
The amount of material input for each test shall be no less than 245kg per cubic meter of the evaporation chamber. B2.2
The working conditions of the evaporator shall meet the following requirements: a. The ultimate pressure of the evaporator before heating shall not be higher than 110Pa; b. The steam pressure input into the jacket shall reach 0.2MPa within 6 minutes from the start of heating, and the steam pressure input into the jacket shall not be greater than 0.25MPa before the end of heating.
B3 Test method
After adding softened water to the evaporation chamber in the amount specified in B2.2, start to evacuate the air. When the evaporation chamber reaches the ultimate pressure specified in B2.3, B3.13
, start steam heating and start the drum. B3.2 Start timing from the start of heating, stop heating and shut down after 12 minutes, and discharge all the remaining solution. B4 Calculation of volumetric evaporation intensity
Where: Py—Volume evaporation intensity, kg/(h'm): —Weight of input material, kg;
Weight of remaining material in the evaporation chamber after evaporation, kg; t-evaporation time, taken as 6min;
V-Volume of evaporation chamber, m\.
Additional instructions:
(m:ma)
This standard is proposed and managed by the National Vacuum Technology Standardization Technical Committee. This standard was drafted by Liaoning Tieling Drying Technology Research Institute. The main drafters of this standard are Zhao Jian, Zhang Yujie and Xu Luji. 6
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