Automatic cleaning system for hydrogen peroxide primary filter

Abstract

The utility model discloses an automatic cleaning system for a hydrogen peroxide primary filter. The automatic cleaning system comprises a solvent cleaning process, a steam blowing process, an alkali washing process, a water washing process, an acid washing process and a nitrogen drying process. A solvent cleaning assembly, a steam cleaning assembly, an alkali washing assembly, a water washing assembly, an acid washing assembly and a nitrogen drying assembly in the cleaning process are connected with a solvent cleaning tank, a cooler, a filter and the like through a first pipeline and a second pipeline to form independent cleaning parts, and meanwhile the solvent cleaning tank serves as a common component to participate in each process. Multi-step cleaning of the filter element in the solvent cleaning tank is completed, and the whole process is automatically carried out through control of the DCS on the stop valves and the pump body. Operation of operators is reduced, and safe operation of the device is guaranteed; the cleaning efficiency is improved, the cleaning time is shortened, and the use amount of acid and alkali is effectively reduced; and the time of each step in cleaning is accurately controlled, and the stable cleaning quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of dry-mixed mortar production, and in particular to an automatic cleaning system for hydrogen peroxide primary filters. Background Technology

[0002] In hydrogen peroxide production, a filter is typically used to intercept the solid catalyst inside the hydrogenation tower, preventing it from being carried into subsequent processes by the working fluid. Common filter cleaning requires manual operation. When the filter differential pressure rises to a warning value, the filter needs to be removed from the system for cleaning or replacement before being put back into the system for reuse.

[0003] Existing filter cleaning technologies have the following drawbacks:

[0004] 1. High dependence on manual labor: The entire filter cleaning process requires operator intervention, which poses a safety hazard.

[0005] 2. High cleaning frequency: Frequent cleaning of the filter element leads to excessive consumption of acid and alkali, resulting in increased costs.

[0006] 3. Large fluctuations in cleaning quality: Manual operation of filter cleaning may result in inaccurate cleaning sequence and other issues, which may lead to substandard cleaning results. Summary of the Invention

[0007] The technical problem to be solved by this utility model is to provide an automatic cleaning system for hydrogen peroxide primary filters, which solves the problems of high dependence on manual cleaning, high cleaning frequency, and large fluctuations in cleaning quality. It fundamentally saves manpower and material resources and realizes cost reduction and efficiency improvement of the device.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0009] An automatic cleaning system for a hydrogen peroxide primary filter includes a first pipe and a second pipe. A solvent tank, a solvent pump, a heater, a solvent shut-off valve, the first pipe, a solvent cleaning tank, the second pipe, a filter shut-off valve, and a filter are connected in sequence. The other end of the filter enters the top of the solvent tank through a pipe. The solvent pump is connected to the bottom of the solvent tank. A second thermometer is provided at the outlet of the heater. The solvent in the solvent tank is used to dissolve the residue on the target filter in the solvent cleaning tank. When in use, the input end of the target filter in the solvent cleaning tank faces the second pipe, and the output end faces the first pipe. The filter is used to filter the solids in the solvent cleaning tank that are not dissolved in the solvent.

[0010] The first pipe is connected to a steam shut-off valve, the second pipe is connected to a cooling and cleaning shut-off valve, the cooling and cleaning shut-off valve is connected to the inlet of the cooler, the outlet of the cooler enters the top of the solvent tank through a pipe, the bottom of the solvent tank is equipped with a liquid level regulating valve, the liquid level regulating valve is connected to the wastewater tank, and the outlet of the cooler is equipped with a first thermometer.

[0011] The second pipeline is connected to the liquid alkali reflux shut-off valve, which is connected to the top of the liquid alkali tank. The bottom of the liquid alkali tank is connected to the first pipeline via a liquid alkali pump and a liquid alkali circulation shut-off valve.

[0012] The first pipe is connected to a water shut-off valve at one end, and the second pipe is connected to a wastewater tank via a waste liquid shut-off valve at one end.

[0013] The second pipeline is connected to the nitric acid reflux shut-off valve, which is connected to the top of the nitric acid tank. The bottom of the nitric acid tank is connected to the first pipeline via a nitric acid pump and a nitric acid circulation shut-off valve.

[0014] The first pipeline is connected to a nitrogen shut-off valve, and the second pipeline is connected to a vent shut-off valve.

[0015] The aforementioned steam shut-off valve, water shut-off valve, nitrogen shut-off valve, liquid alkali circulation shut-off valve, nitric acid circulation shut-off valve, cooling and cleaning shut-off valve, filter shut-off valve, solvent shut-off valve, vent shut-off valve, liquid alkali reflux shut-off valve, nitric acid reflux shut-off valve, waste liquid shut-off valve, and liquid level regulating valve are controlled to open and close by the DCS system; the solvent pump, liquid alkali pump, and nitric acid pump are controlled to start and stop by the DCS system.

[0016] The automatic cleaning system for a hydrogen peroxide primary filter provided by this utility model has the following beneficial effects:

[0017] 1. The automatic filter cleaning system reduces operator workload and ensures safe operation of the equipment.

[0018] 2. Improved cleaning efficiency and shortened cleaning time, effectively reducing the amount of acid and alkali used.

[0019] 3. Precisely control the time of each step in the cleaning process to ensure consistent cleaning quality. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Figure 1 This is a schematic diagram of the automatic cleaning system of this utility model.

[0022] In the diagram: Steam shut-off valve 1, Water shut-off valve 2, Nitrogen shut-off valve 3, Liquid alkali circulation shut-off valve 4, Nitric acid circulation shut-off valve 5, Solvent cleaning tank 6, Cooling cleaning shut-off valve 7, Cooler 8, First thermometer 9, Filter shut-off valve 10, Filter 11, Solvent shut-off valve 12, Second thermometer 13, Drain shut-off valve 14, Liquid alkali reflux shut-off valve 15, Nitric acid reflux shut-off valve 16, Heater 17, Waste liquid shut-off valve 18, Liquid alkali tank 19, Liquid alkali pump 20, Nitric acid pump 21, Nitric acid tank 22, Solvent tank 23, Solvent pump 24, Liquid level regulating valve 25, Wastewater tank 26, First pipeline 27, Second pipeline 28. Detailed Implementation

[0023] like Figure 1 As shown, an automatic cleaning system for a hydrogen peroxide primary filter includes a first pipe 27 and a second pipe 28. A solvent tank 23, a solvent pump 24, a heater 17, a solvent shut-off valve 12, the first pipe 27, a solvent cleaning tank 6, the second pipe 28, a filter shut-off valve 10, and a filter 11 are connected in sequence. The other end of the filter 11 enters the top of the solvent tank 23 through a pipe. The solvent pump 24 is connected to the bottom of the solvent tank 23. A second thermometer 13 is provided at the outlet end of the heater 17. The solvent in the solvent tank 23 is used to dissolve the residue on the target filter in the solvent cleaning tank 6. When in use, the input end of the target filter in the solvent cleaning tank 6 faces the second pipe 28, and the output end faces the first pipe 27. The filter 11 is used to filter the solid portion in the solvent cleaning tank 6 that has not dissolved in the solvent.

[0024] The first pipe 27 is connected to a steam shut-off valve 1 at one end, and a cooling and cleaning shut-off valve 7 is connected to the second pipe 28. The cooling and cleaning shut-off valve 7 is connected to the inlet end of the cooler 8. The outlet end of the cooler 8 enters the top of the solvent tank 23 through a pipe. The bottom end of the solvent tank 23 is equipped with a liquid level regulating valve 25, which is connected to the wastewater tank 26. The outlet end of the cooler 8 is equipped with a first thermometer 9.

[0025] The aforementioned second pipe 28 is connected to the liquid alkali reflux shut-off valve 15, which is connected to the top of the liquid alkali tank 19. The bottom of the liquid alkali tank 19 is connected to the first pipe 27 via the liquid alkali pump 20 and the liquid alkali circulation shut-off valve 4.

[0026] The first pipe 27 is connected to a water shut-off valve 2 at one end, and the second pipe 28 is connected to a wastewater tank 26 via a waste liquid shut-off valve 18 at one end.

[0027] The second pipeline 28 is connected to the nitric acid reflux shut-off valve 16, which is connected to the top of the nitric acid tank 22. The bottom of the nitric acid tank 22 is connected to the first pipeline 27 via the nitric acid pump 21 and the nitric acid circulation shut-off valve 5.

[0028] The first pipe 27 is connected to a nitrogen shut-off valve 3 at one end, and the second pipe 28 is connected to a vent shut-off valve 14 at one end.

[0029] The steam shut-off valve 1, water shut-off valve 2, nitrogen shut-off valve 3, liquid alkali circulation shut-off valve 4, nitric acid circulation shut-off valve 5, cooling and cleaning shut-off valve 7, filter shut-off valve 10, solvent shut-off valve 12, vent shut-off valve 14, liquid alkali reflux shut-off valve 15, nitric acid reflux shut-off valve 16, waste liquid shut-off valve 18, and liquid level regulating valve 25 mentioned above are controlled to open and close by the DCS system; the solvent pump 24, liquid alkali pump 20, and nitric acid pump 21 are controlled to start and stop by the DCS system.

[0030] The automatic filter cleaning system of this utility model is used to clean the target filter of the solvent cleaning tank 6. When in use, the input end of the target filter in the solvent cleaning tank 6 faces the second pipe 28, and the output end faces the first pipe 27. The significance is that, as shown in the figure, when the filter in the solvent cleaning tank 6 is put into use, the upper end is the output end and the lower end is the input end. When cleaning, solvent, steam, etc. are introduced into the upper output end so that the solids on the filter can be washed off and discharged from the lower input end. The target filter in the solvent cleaning tank 6 is sintered.

[0031] The cleaning process is as follows:

[0032] During filter cleaning, the first step is solvent cleaning, which takes 2 hours. The solvent is pumped into heater 17 by solvent pump 24 for heating. The DCS system detects the solvent temperature detected by the second thermometer 13 and controls the heating power of heater 17. The heated solvent enters the first pipe 27 through the open solvent shut-off valve 12, then enters the solvent cleaning tank 6, the second pipe 28, and the open filter shut-off valve 10 to enter the filter 11. After solvent cleaning of the filter 11, it flows back to the solvent tank 23, completing the solvent cleaning cycle. During this process, most of the solid catalyst and impurities adhering to the filter in the solvent cleaning tank 6 are dissolved by the solvent, and the insoluble parts are flushed to the filter 11 and filtered out. After the cleaning process is completed, the filter 11 can be opened to discharge the solid impurities. During the flushing process, the filter shut-off valve 10 and the solvent shut-off valve 12 are opened by the DCS system, and other shut-off valves are closed. The solvent pump 24 is started and stopped by the DCS system.

[0033] The second step of the cleaning process involves steam purging, which takes 3 hours. Steam enters solvent tank 23 through steam shut-off valve 1, solvent cleaning tank 6, second pipeline 28, cooling cleaning shut-off valve 7, and cooler 8. The steam originates from the outside connected to steam shut-off valve 1. Cooler 8 cools the cleaned steam into condensate in solvent tank 23. The water phase in solvent tank 23 is discharged into wastewater tank 26 by level regulating valve 25, completing the steam purging process. This process also removes residual solvent from solvent cleaning tank 6, completing the purging. During the steam purging process, steam shut-off valve 1 and cooling cleaning shut-off valve 7 are opened by the DCS system, and level regulating valve 25 is opened and closed by the DCS system according to the liquid level in solvent tank 23. Other shut-off valves in the system are closed during this process.

[0034] The third step of the cleaning process is alkaline washing, which takes 2 hours. The alkaline solution enters the first pipeline 27 sequentially through the liquid alkali pump 20 and the liquid alkali circulation shut-off valve 4, and then flows back to the liquid alkali tank 19 sequentially through the solvent cleaning tank 6 and the liquid alkali return shut-off valve 15, forming an alkaline washing cycle. During the alkaline washing cycle, the liquid alkali circulation shut-off valve 4 and the liquid alkali return shut-off valve 15 are opened by the DCS system, while other shut-off valves are closed. The liquid alkali pump 20 is started and stopped by the DCS system.

[0035] The fourth step of the cleaning process is water washing, which takes 2 hours. The demineralized water enters the first pipeline 27 through the water shut-off valve 2, and then passes through the solvent cleaning tank 6, the second pipeline 28 and the waste liquid shut-off valve 18 in sequence before entering the wastewater tank 26. During the water washing process, the water shut-off valve 2 and the waste liquid shut-off valve 18 are opened by the DCS system, while the other shut-off valves are closed. This process cleans the residual alkaline solution in the solvent cleaning tank 6.

[0036] The fifth step of the cleaning process is acid pickling, which takes 2 hours. Nitric acid solution sequentially enters the first pipeline 27 through nitric acid pump 21 and nitric acid circulation shut-off valve 5, then flows back to nitric acid tank 22 through solvent cleaning tank 6 and nitric acid reflux shut-off valve 16, forming an acid pickling cycle. During this cycle, nitric acid circulation shut-off valve 5 and nitric acid reflux shut-off valve 16 are opened under the control of the DCS system, while other shut-off valves are closed. Nitric acid pump 21 is started and stopped under the control of the DCS system. The acid used in the pickling process is low-concentration nitric acid, used to neutralize residual alkali and passivate the metal.

[0037] The sixth step of cleaning is rinsing with water, the process is the same as the fourth step.

[0038] The seventh step of the cleaning process is nitrogen drying, which takes 0.5 hours. Nitrogen enters the first pipeline 27 through the nitrogen shut-off valve 3, and then passes through the solvent cleaning tank 6, the second pipeline 28 and the vent shut-off valve 14 in sequence to complete the nitrogen drying process and dry the solvent cleaning tank 6. During the nitrogen drying process, the nitrogen shut-off valve 3 and the vent shut-off valve 14 are opened by the DCS control system, while other shut-off valves are closed.

Claims

1. An automatic cleaning system for a hydrogen peroxide primary filter, characterized in that: Including the first Pipeline (27) and second pipeline (28), solvent tank (23), solvent pump (24), heater (17), solvent shut-off valve (12), first pipeline (27), solvent cleaning tank (6), second pipeline (28), filter shut-off valve (10) and filter (11) are connected in sequence. The other end of filter (11) enters the top of solvent tank (23) through pipeline. Solvent pump (24) is connected to the bottom of solvent tank (23). The outlet end of heater (17) is equipped with a second thermometer (13). The solvent in solvent tank (23) is used to dissolve the residue on the cleaning target filter in solvent cleaning tank (6). When using the cleaning target filter in solvent cleaning tank (6), the input end faces the second pipeline (28) and the output end faces the first pipeline (27). Filter (11) is used to filter the solid part in solvent cleaning tank (6) that has not dissolved in solvent.

2. The automatic cleaning system for a hydrogen peroxide primary filter according to claim 1, characterized in that, The first pipe (27) is connected to a steam shut-off valve (1) at its end, and a cooling and cleaning shut-off valve (7) is connected to the second pipe (28). The cooling and cleaning shut-off valve (7) is connected to the inlet end of the cooler (8). The outlet end of the cooler (8) enters the top of the solvent tank (23) through a pipe. The bottom end of the solvent tank (23) is equipped with a liquid level regulating valve (25). The liquid level regulating valve (25) is connected to the wastewater tank (26). The outlet end of the cooler (8) is equipped with a first thermometer (9).

3. The automatic cleaning system for a hydrogen peroxide primary filter according to claim 2, characterized in that, The second pipe (28) is connected to the liquid alkali reflux shut-off valve (15), the liquid alkali reflux shut-off valve (15) is connected to the top of the liquid alkali tank (19), and the bottom of the liquid alkali tank (19) is connected to the first pipe (27) through the liquid alkali pump (20) and the liquid alkali circulation shut-off valve (4).

4. The automatic cleaning system for a hydrogen peroxide primary filter according to claim 3, characterized in that, The first pipe (27) is connected to a water shut-off valve (2) at one end, and the second pipe (28) is connected to a wastewater tank (26) at one end via a waste liquid shut-off valve (18).

5. The automatic cleaning system for a hydrogen peroxide primary filter according to claim 4, characterized in that, The second pipeline (28) is connected to the nitric acid reflux shut-off valve (16), the nitric acid reflux shut-off valve (16) is connected to the top of the nitric acid tank (22), and the bottom of the nitric acid tank (22) is connected to the first pipeline (27) through the nitric acid pump (21) and the nitric acid circulation shut-off valve (5).

6. The automatic cleaning system for a hydrogen peroxide primary filter according to claim 5, characterized in that, The first pipe (27) is connected to a nitrogen shut-off valve (3) at one end, and the second pipe (28) is connected to a vent shut-off valve (14) at one end.

7. The automatic cleaning system for a hydrogen peroxide primary filter according to claim 6, characterized in that, The steam shut-off valve (1), water shut-off valve (2), nitrogen shut-off valve (3), liquid alkali circulation shut-off valve (4), nitric acid circulation shut-off valve (5), cooling and cleaning shut-off valve (7), filter shut-off valve (10), solvent shut-off valve (12), vent shut-off valve (14), liquid alkali reflux shut-off valve (15), nitric acid reflux shut-off valve (16), waste liquid shut-off valve (18), and liquid level regulating valve (25) are controlled to open and close by the DCS system; the solvent pump (24), liquid alkali pump (20), and nitric acid pump (21) are controlled to start and stop by the DCS system.

Images