T/ZJDJ 004-2022 Active Group standards

T/ZJDJ 004-2022 Self-priming stirrer for hydrogenation reactor

Publish Date: 2022-08-20 Implement Date: 2022-09-10 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/ZJDJ 004-2022

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: The reaction vessel and its components

Publish Date: 2022-08-20

Implement Date: 2022-09-10

Scope

Main Technical Content: 5.1 General Requirements 5.1.1 The matching between various components of the mixer should be reasonable and reliable, ensuring its mixing process performance and mechanical properties. 5.1.2 After dynamic balancing, the mixing shaft and impeller should be installed as a whole through the manhole or mounting hole. If disassembly is necessary, clear markings should be used to indicate the original installation position. 5.1.3 There should be clear markings on the outside of the container to indicate the direction of the mixing shaft. 5.1.4 There should be suitable anti-loosening measures for all rotating components and for the connection bolts and nuts between rotating components and the frame, as well as between the frame and the container. 5.1.5 The start-up should be linked to the material level in the reactor. 5.2 Mixing Shaft and Mixing Components 5.2.1 When the mixing components are designed with rigid structure, the operating speed should be less than 0.7 times the first-order critical speed. For mixers with two blades located far from the fixed end, the ratio of the operating speed to the first-order critical speed should also be outside the range of (0.45-0.55). 5.2.2 When the mixing components are designed with flexible structure, the ratio of the operating speed to the first-order critical speed should be greater than 1.3, and it should not be a simple multiple of the first-order critical speed. There should be a 10% margin. Clear markings indicating that the mixer should not run empty should be provided in a prominent location. 5.2.3 Hollow shafts are allowed, but they must be sealed and welded at both ends and undergo a comprehensive dynamic balancing test. 5.2.4 For mixers with flexible design and axial flow mixers located far from the fixed end, a stabilizer should be installed below the mixer, and the stabilizer should be completely immersed in the medium during operation. 5.2.5 For the bearing, couplin