This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of GT6K8 double-effect vacuum concentrator. This standard applies to the double-effect vacuum concentrator in GT11B1 tomato sauce complete set equipment. QB/T 1702.7-1993 Double-effect vacuum concentrator QB/T1702.7-1993 Standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
Double-effect vacuum concentrator
Subject content and scope of application
QB/T 1702.7—1993
This standard specifies the product classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of GT6K8 double-effect vacuum concentrator.
This standard applies to the double-effect vacuum concentrator in GT11B1 tomato sauce complete set equipment. 2 Reference standards
GB150Steel pressure vessels
GB151Steel shell and tube heat exchanger
GB/T14253General technical conditions for light industrial machineryJB/T302Classification of casting defect names
QB/T842.2
General technical conditions for light industrial machinery weighing instrumentsCastingsQB/T 1588. 1
General technical conditions for light industrial machinery welded parts
QB/T 1588.3
General technical conditions for light industrial machinery assembly
QB/T 1588. 4
General technical conditions for painting
Light industrial machinerybzxZ.net
QB/T1702.112t/dTomato sauce complete equipmentDetermination of sound pressure level of metal cutting machine toolsZB I50 004
3 Product classification
3.1 Product type
This product is a countercurrent double-effect external heating vacuum concentration equipment. 3.2 Product model
Equipment design sequence number
Equipment variety code (concentration)
Equipment category code (material processing)
Equipment professional code (head machinery)
Note: The product model is issued by the Hangzhou Light Industry Machinery Design Institute of the Ministry of Light Industry. 3.3 Basic parameters
Basic parameters are shown in Table 1.
Approved by the Ministry of Light Industry of the People's Republic of China on March 28, 1993
Implemented on October 1, 1993
Water evaporation
Steam pressure for heater
Steam pressure for steam jet pump
Vacuum degree of effect I
Vacuum degree of effect II
Heating area of ​​effect I
Heating area of ​​effect II
Steam consumption for concentrated heating
Steam consumption of steam jet pump
Unit cooling water consumption (based on inlet water 25℃, outlet water 40℃)Installed capacity
4 Technical requirements
QB/T 1702.7—1993
kg/kg evaporation water
kg/kg evaporation water
kg/kg evaporation water
≥3600
0.073~0.08
0.083~0.093
4.1 Products shall comply with the requirements of this standard and be manufactured according to drawings and technical documents approved by the prescribed procedures. At the same time, they shall also comply with the requirements of QB/T1702.1.
4.2 All purchased parts and raw materials shall have the inspection certificate or quality assurance certificate of the supplier. If there is no certificate or quality assurance certificate, the manufacturer shall inspect the purchased parts and raw materials and only qualified ones can be used. 4.3 The basic technical requirements of the whole machine shall comply with the relevant provisions of GB/T14253. 4.4 The insulation resistance shall not be less than 2MQ, and the grounding resistance shall not be greater than 0.2Q. 4.5 The working noise shall not be greater than 85 dB(A). 4.6 Cast iron parts shall comply with the provisions of QB/T842.2, and other castings shall not have various defects that affect the strength and other properties of castings as specified in JB/T302.
4.7 Except for special provisions, the welding of parts and products shall comply with the provisions of QB/T1588.1. 4.8 The parts in contact with materials shall be made of materials that meet the requirements of food hygiene. The products shall be easy to clean and disinfect. The pipes shall be bent as little as possible, and there shall be no blind ends or right angles. 4.9 The assembly of products shall comply with the provisions of QB/T1588.3. 4.10 The paint shall comply with the provisions of QB/T1588.4. 4.11
Main component manufacturing requirements
4.11.1 Heater
The manufacture of heaters shall refer to the provisions of GB151 Chapter 4 on manufacturing, inspection and acceptance; b.
The surface roughness R value of the heater in contact with the material shall not be greater than 3.2um. Double-layer evaporation chamber
The manufacture of double-layer evaporation chamber shall refer to the relevant provisions of Article 10.2 in Chapter 10 of GB150 on manufacturing, inspection and acceptance; the double-layer evaporation chamber shall be subject to a density test and a pressure test, and the test pressure is 0.20MPa; the surface roughness R of the double-layer evaporation chamber in contact with the material shall not be greater than 1.6μm. Condenser
The manufacture of condenser shall refer to the relevant provisions of Article 10.2 in Chapter 10 of GB150 on manufacturing, inspection and acceptance; the condenser shall be subject to a density test and a pressure test, and the test pressure is 0.20MPa. Circulating pump
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Standard material
QB/T 1702.7—1993
The impeller needs to be subjected to static balance test, and the permissible imbalance per unit mass shall not exceed 45g·m/kg. The plane between the sealing dynamic ring and the static ring must be dense and there shall be no obvious leakage; b.
The lead-based alloy lining of the sliding bearing shall not contain bubbles, pores and slag, and the lead-based alloy lining shall not fall off. c.
4.11.5 Screw pump
The screw pump shall be able to meet the discharge of materials under normal conditions in the I-effect evaporation chamber; a.
b. The screw sleeve shall be made of edible rubber with a heat-resistant temperature of 120℃ and a Shore hardness of 70~80. 4.11.6 Steam jet pump
The manufacture of steam jet pump should ensure that under the working steam pressure, its suction gas pressure and exhaust gas pressure meet the requirements of Table 2. Table 2
First-stage steam jet pump
Second-stage steam jet pump
Note: The gas pressure referred to here is absolute pressure. 4. 12
Intake gas pressure/MPa
The pipe connection must be straight and neat, and there must be no obvious leakage at each connection. Exhaust gas pressure/MPa
3The surface should be clean. The exposed polished surface pattern is neat and clear, and there must be no obvious defects such as unevenness, black spots, burns, scratches, etc. Table 4.13
Surface roughness R. The value shall not be greater than 3.2μm. 5 Test method
5.1 Water evaporation
Use Abbe refractometer to measure the solid content of the sauce before and after concentration, and then calculate it according to formula (1): w. - s(α -1)
（1）
W. Water evaporation. kg/h;
S--—the amount of concentrated tomato sauce per unit time, kg/hB,—the solid content of the sauce before concentration, %, B2--the solid content of the sauce after concentration, %. 5.2 Unit steam consumption
Use a steam flow meter with an accuracy of 1.5 and the condensed water weighing method to measure the steam consumption per unit time, and then compare it with the evaporation amount at the corresponding time: that is,
D = Dr/W.
W.
W.
W.
5.3 Unit water consumption
Use a flow meter with an accuracy of 0.5 level on the cooling water inlet pipe to measure the cooling water consumption per unit time, and then compare it with the water evaporation in the corresponding time, that is:
Where: W—unit water consumption, kg/kg evaporated water; W—water consumption per unit time, kg/h (based on inlet water 25℃, outlet water 40℃). (3)
The measurement should be carried out under the conditions of inlet water temperature of 25℃ 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℃, and then the measured unit water consumption should be converted into the unit water consumption under this condition according to formula (4). W - W,(T - T)/(40℃-25℃C)W.Where: W,———measured water consumption per unit time, kg/h; quasi-net change
(4)
-water outlet temperature at the time of measurement, ℃,
Th-water inlet temperature at the time of measurement, ℃.
5.4 Electric power consumption
QB/T 1702.7-—1993
Tested with a three-phase power meter with an accuracy of 0.5 level, the value shall not be greater than the provisions of the installed capacity in Table 1. 5.5 Insulation resistance, grounding resistance
Measure the insulation resistance between the motor outlet terminal and the housing with a 500V megohmmeter with an accuracy of 1.0 level; measure the grounding resistance between the grounding terminal and the housing with a digital micro-ohmmeter with an accuracy of ±0.001Q, which shall comply with the provisions of Article 4.4. 5.6 Noise
Select 8 measuring points (16 points in total) at 3.5m and 7m above the ground and 1m from the outer edge of the equipment, and use a sound level meter with an accuracy of ±1dB to test in accordance with the provisions of ZBJ50004. It should meet the requirements of 4.5.7 Article 4.11.1a of this standard
refers to the relevant provisions of GB 151 Chapter 4, manufacturing, inspection and acceptance for testing. 5.8 Articles 4.11.2a and 4.11.3a of this standard refer to the relevant provisions of Article 10.2 of Chapter 10, manufacturing, inspection and acceptance of GB150 for testing. 5.9 Pressure test and tightness test of double-layer evaporation chamber and condenser The pressure test shall be carried out in accordance with the provisions of Article 10.9.4 of GB150, the test pressure is 0.20MPa, and there is no leakage when visually observed. The tightness test shall be carried out in accordance with the provisions of Article 10.9.6.2 of GB150, i.e., kerosene penetration test. 5.10 Other items shall be inspected by conventional methods such as visual inspection, listening, hand touch, roughness sample, etc. 6 Inspection rules
Inspection is divided into factory inspection and type inspection.
6.1 Factory inspection
6.1.1 Inspection must be carried out before the product leaves the factory. 6.1.2 Each batch of products shall be inspected for manufacturing, assembly, appearance, etc. according to the product drawings, technical documents and requirements of 4.1~4.4 and 4.6~4.12 (except 4.11.5& and 4.11.6) approved by the prescribed procedures. 6.1.3 Products may leave the factory only after passing the inspection, and shall be accompanied by documents proving the quality of the machine. 6.2 Type inspection
6.2.1 Type inspection shall be carried out in any of the following situations: finalization appraisal of new product trial production or transfer of old product to factory production; a.
After formal production, if there are major changes in structure, materials and processes that may affect product performance; b.
Once every three years during normal production;
d. When the product is stopped for a long time and then resumes production;
When the national quality supervision agency proposes the requirement of type inspection. 6.2.2 Type inspection shall be conducted on one unit randomly selected from the qualified products after export inspection, and the inspection items shall comply with the provisions of Article 3.3 and Chapter 4. Type inspection is conducted in the user unit. 6.2.3 Judgment rules
If the type inspection fails, the product shall be doubled for inspection. If it still fails, the batch of products shall be deemed unqualified. 7 Marking, packaging, transportation and storage
According to the provisions of Chapter 8 of QB/T1702.1.
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Additional notes:
This standard is proposed by the Technical Equipment Department of the Ministry of Light Industry. QB/T1702.7—1993
This standard is under the jurisdiction of the National Light Industry Machinery Standardization Center. This standard was drafted by Shanghai Qianwei Machinery Factory. The main drafter of this standard is Shi Lianguan.
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