Automatic blowing device and blowing method for differential pressure measurement pipeline of desulfurization tower demister
A technology for measuring pipelines and demisters, which is applied in the field of desulfurization, can solve problems such as increasing the workload of on-site operation and maintenance personnel, affecting the accuracy of differential pressure measurement of demisters, and blockage of pressure guiding pipes, so as to reduce labor intensity and maintain Unimpeded and accurate effect
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Embodiment 1
[0052] Example 1, such as figure 1 As shown, an automatic purging device for the differential pressure measurement pipeline of the desulfurization tower demister is used to purge the differential pressure sampling pipeline connected to the differential pressure transmitter 6, and the differential pressure sampling pipeline includes The high-pressure guiding pipe 8 and the low-pressure guiding pipe 7 on the wall 12, the high-pressure guiding pipe 8 communicates with the absorption tower at the entrance of the demister 13, and the low-pressure guiding pipe 7 communicates with the outlet of the demister 13 The absorption tower at is connected, including:
[0053] High-pressure sampling shut-off valve 2, which is arranged on the high-pressure guiding pipe 8;
[0054] Low-pressure sampling shut-off valve 3, which is arranged on the low-pressure guiding pipe 7;
[0055]The first purge pipeline 10, one end communicates with the compressed air pipeline 9, and the other end communica...
Embodiment 2
[0059] Example 2, such as figure 2 As shown, the difference from the first embodiment is that the automatic purging device for the differential pressure measurement pipeline of the desulfurization tower eliminator also includes:
[0060] The balance pipeline is connected with the high-pressure guiding pipe 8 and the low-pressure guiding pipe 7. A balance valve 4 is arranged on the balance pipeline. Between the purge joint and the high-pressure sampling shut-off valve 2; the balance line and the low-pressure pressure guiding pipe 7 are communicated through the second balance joint, and the second balance joint is located between the second purge joint and the low-pressure sampling shut-off valve 3. After the pressure guide tube is purged, the pressure in the high pressure guide tube and the low pressure guide tube may exceed the pressure upper limit of the differential pressure transmitter, which will damage the differential pressure transmitter. Before the transmitter and th...
Embodiment 3
[0062] Example 3, such as figure 2 As shown, the difference from the second embodiment is that the automatic purging device for the differential pressure measurement pipeline of the desulfurization tower demister also includes:
[0063] The automatic purge device box 14 integrates the first purge pipeline 10, the second purge pipeline 11, the balance pipeline, the high-pressure sampling shut-off valve 2, the low-pressure sampling shut-off valve 3, the balance valve 4, the second The first purge switch valve 1 and the second purge switch valve 5, the high pressure guide pipe 8, the low pressure guide pipe 7, and the compressed air pipeline 9 pass through the automatic purge device box 14; The sweeping device plays a protective role, which is convenient for on-site installation and wiring;
[0064] Automatic purge box and exterior The high-pressure guide tube and low-pressure guide tube are connected by welding, and are connected with the external The instrument compressed...
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