Defoaming agent adding system

Abstract

The utility model belongs to the technical field of defoaming agent adding equipment, and discloses a defoaming agent adding system which comprises a defoaming agent buffer tank, a first electric butterfly valve, a defoaming agent conveying pump, a refined water storage tank and a second electric butterfly valve, an outlet of the defoaming agent buffer tank is connected with an inlet of the first electric butterfly valve, an outlet of the first electric butterfly valve is connected with an inlet of the defoaming agent conveying pump, and an outlet of the defoaming agent conveying pump is used for being connected with a defoaming agent adding port of the deacidification system; an outlet of the refined water storage tank is connected with an inlet of the second electric butterfly valve; an outlet of the second electric butterfly valve is connected between an outlet of the first electric butterfly valve and an inlet of the defoaming agent conveying pump; according to the utility model, the defoaming agent delivery pump is utilized to pressurize the defoaming agent, so that the addition operation of the defoaming agent is realized; the demineralized water in the refined water storage tank is used for flushing the defoaming agent residual in the defoaming agent conveying pump and the pipeline, so that the blockage of the pump and the pipeline caused by the flocculation of the defoaming agent is avoided, and the subsequent defoaming agent adding operation is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of defoamer adding equipment, in particular to a defoamer adding system. Background Art

[0002] In chemical plants, it is generally necessary to bring gas and solution into reverse contact to achieve deacidification. However, foaming is inevitable during the reverse contact between gas and solution, resulting in fluctuations in solution level, tower flooding, and even shutdown of the device. To this end, defoaming agents are added to reduce or avoid foaming. Conventional methods of adding defoamers are: (1) adding a short section to the pipeline to inject the defoamer and using the solution in the main pipeline to bring it in. The disadvantage is that personnel are required to operate on site, and the back pressure when injecting the defoamer is often 5-8 MPa. Therefore, there is a great safety risk in adding a short section. (2) Storing the defoamer in a storage tank and injecting the defoamer into the solution system by a pump. However, due to the flocculation of the defoamer, the pump is easily blocked, which makes it impossible to add the defoamer normally. Utility Model Content

[0003] In view of the technical problems existing in the prior art, the utility model provides a defoaming agent adding system to solve the technical problem that the existing defoaming agent adding method is prone to cause pump blockage, thereby causing the defoaming agent to be unable to be added normally.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The utility model provides a defoaming agent adding system, comprising a defoaming agent buffer tank, a first electric butterfly valve, a defoaming agent delivery pump, a refined water storage tank and a second electric butterfly valve;

[0006] The outlet of the defoamer buffer tank is connected to the inlet of the first electric butterfly valve, the outlet of the first electric butterfly valve is connected to the inlet of the defoamer delivery pump, and the outlet of the defoamer delivery pump is used to be connected to the defoamer adding port of the deacidification system;

[0007] The outlet of the refined water storage tank is connected to the inlet of the second electric butterfly valve, and the outlet of the second electric butterfly valve is connected between the outlet of the first electric butterfly valve and the inlet of the defoaming agent delivery pump.

[0008] Furthermore, it also includes a first one-way valve and a first gate valve; the first one-way valve and the first gate valve are connected in series between the outlet of the defoaming agent buffer tank and the inlet of the first electric butterfly valve in sequence.

[0009] Furthermore, it also includes a first ball valve; the first ball valve is arranged between the outlet of the first electric butterfly valve and the inlet of the defoaming agent delivery pump.

[0010] Furthermore, it also includes a second one-way valve and a second ball valve; the second one-way valve and the second ball valve are connected in series between the outlet of the defoaming agent delivery pump and the defoaming agent adding port of the deacidification system.

[0011] Furthermore, the outlet of the refined water storage tank is arranged in two ways, wherein the first outlet is connected to the inlet of the second electric butterfly valve, and the second outlet is connected to the flushing water inlet of the defoaming agent buffer tank.

[0012] Furthermore, it also includes a second gate valve and a third one-way valve; the second gate valve and the third one-way valve are connected in series between the first outlet and the inlet of the second electric butterfly valve in sequence.

[0013] Furthermore, it also includes a third ball valve; the third ball valve is arranged at the second outlet and connected to the flushing water inlet of the defoaming agent buffer tank.

[0014] Furthermore, it also includes a control unit; the output end of the control unit is connected to the control ends of the first electric butterfly valve, the second electric butterfly valve and the defoaming agent delivery pump; wherein the control unit is used to send start and stop instructions to the first electric butterfly valve, the second electric butterfly valve or the defoaming agent delivery pump.

[0015] Furthermore, the deacidification system is an absorption tower or a regeneration tower.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The defoamer adding system described in the utility model realizes the defoamer adding operation by using the defoamer delivery pump to pressurize the defoamer through the defoamer buffer tank, the first electric butterfly valve and the defoamer delivery pump which are connected in sequence; by arranging the refined water storage tank and the second electric butterfly valve, after the defoamer addition is completed, the desalted water in the refined water storage tank is used to flush the defoamer delivery pump and the defoamer remaining in the pipeline to avoid the blockage of the pump and the pipeline due to the flocculation of the defoamer, thereby ensuring the subsequent defoamer adding operation; the utility model has the advantages of simple structure, convenient operation and strong practicality.

[0018] Furthermore, by adding a one-way valve, a gate valve and a ball valve structure to the system, the safety and reliability of the system are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural block diagram of the defoamer adding system described in the utility model.

[0020] Among them, 1 defoamer buffer tank, 2 first one-way valve, 3 first gate valve, 4 first electric butterfly valve, 5 first ball valve, 6 defoamer delivery pump, 7 second one-way valve, 8 second ball valve, 9 refined water storage tank, 10 second gate valve, 11 third one-way valve, 12 second electric butterfly valve, 13 third ball valve, 14 control unit, 15 fourth one-way valve, 16 fourth ball valve, 17 fifth one-way valve, 18 fifth ball valve, 19 absorption tower, 20 regeneration tower. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] As attached Figure 1 As shown, the utility model provides a defoaming agent adding system, including a defoaming agent buffer tank 1, a first one-way valve 2, a first gate valve 3, a first electric butterfly valve 4, a first ball valve 5, a defoaming agent delivery pump 6, a second one-way valve 7, a second ball valve 8, a refined water storage tank 9, a second gate valve 10, a third one-way valve 11, a second electric butterfly valve 12, a third ball valve 13, a control unit 14, a fourth one-way valve 15, a fourth ball valve 16, a fifth one-way valve 17 and a fifth ball valve 18.

[0023] Defoaming agent is pre-stored in the defoaming agent buffer tank 1, and the outlet of the defoaming agent buffer tank 1 is connected to the inlet of the first one-way valve 2, the outlet of the first one-way valve 2 is connected to the inlet of the first gate valve 3, the outlet of the first gate valve 3 is connected to the inlet of the first electric butterfly valve 4; the outlet of the first electric butterfly valve 4 is connected to the inlet of the first ball valve 5, the outlet of the first ball valve 5 is connected to the inlet of the defoaming agent delivery pump 6, the outlet of the defoaming agent delivery pump 6 is connected to the inlet of the second one-way valve 7, the outlet of the second one-way valve 7 is connected to the inlet of the second ball valve 8, and the outlet of the second ball valve 8 is connected to the defoaming agent addition port of the deacidification system.

[0024] Desalted water is pre-stored in the refined water storage tank 9, and the outlet of the refined water storage tank 9 is arranged in two ways; wherein, the first outlet is connected to the inlet of the first gate valve 10, the outlet of the second gate valve 10 is connected to the inlet of the third one-way valve 11, the outlet of the third one-way valve 11 is connected to the inlet of the second electric butterfly valve 12, and the outlet of the second electric butterfly valve 12 is connected to the pipeline between the outlet of the first electric butterfly valve 4 and the inlet of the first ball valve 5; the second outlet is connected to the inlet of the third ball valve 13, and the outlet of the third ball valve 13 is connected to the flushing water inlet of the defoaming agent buffer tank 1.

[0025] The control unit 14 is used to remotely control the first electric butterfly valve 4, the defoaming agent delivery pump 6 and the second electric butterfly valve 12; wherein the output end of the control unit 14 is connected to the control ends of the first electric butterfly valve 4, the defoaming agent delivery pump 6 and the second electric butterfly valve 12, and the control unit 14 is used to send start and stop instructions to the first electric butterfly valve 4, the defoaming agent delivery pump 6 or the second electric butterfly valve 12.

[0026] Specifically, the control unit 14 includes a first PLC control module, a second PLC control module and a third PLC control module; the output end of the first PLC control module is connected to the control end of the first electric butterfly valve 4, for sending a first electric butterfly valve start-stop instruction to the first electric butterfly valve 4; wherein the first electric butterfly valve start-stop instruction is used to trigger the first electric butterfly valve 4 to perform an opening or closing action; the output end of the second PLC control module is connected to the control end of the defoaming agent delivery pump 6, for sending a delivery pump start-stop instruction to the defoaming agent delivery pump 6; wherein the delivery pump start-stop instruction is used to trigger the defoaming agent delivery pump 6 to perform an opening or closing action; the output end of the third PLC control module is connected to the control end of the second electric butterfly valve 12, for sending a second electric butterfly valve start-stop instruction to the second electric butterfly valve 12; wherein the second electric butterfly valve start-stop instruction is used to trigger the second electric butterfly valve 12 to perform an opening or closing action.

[0027] In the utility model, the deacidification system is an absorption tower 19 and a regeneration tower 20; specifically, the outlet of the third ball valve 13 is arranged in two ways, one of which is connected to the inlet of the fourth one-way valve 15, and the other is connected to the inlet of the fifth one-way valve 17; the outlet of the fourth one-way valve 15 is connected to the inlet of the fourth ball valve 16, and the outlet of the fourth ball valve 16 is connected to the defoaming agent addition port of the absorption tower 19; the outlet of the fifth one-way valve 17 is connected to the inlet of the fifth ball valve 18, and the outlet of the fifth ball valve 18 is connected to the defoaming agent addition port of the regeneration tower 20.

[0028] It should be noted that the first one-way valve 2, the first gate valve 3, the first ball valve 5, the second one-way valve 7, the second ball valve 8, the second gate valve 10, the third one-way valve 11, the third ball valve 13, the fourth one-way valve 15, the fourth ball valve 16 and the fifth one-way valve 17 are all in a normally open state.

[0029] Working principle:

[0030] The defoaming agent adding system described in the utility model is at work. When foaming occurs in the deacidification system, the first electric butterfly valve 4 and the defoaming agent delivery pump 6 are opened, and the second electric butterfly valve 12 is kept closed. At this time, the defoaming agent pre-stored in the defoaming agent buffer tank 1 will pass through the first electric butterfly valve 4, and be delivered to the deacidification system after being pressurized by the defoaming agent delivery pump 6 to participate in the defoaming reaction; when the foaming phenomenon in the deacidification system disappears or the defoaming agent is added to a preset amount, the second electric butterfly valve 12 is opened, and then the first electric butterfly valve 4 is closed. At this time, the desalted water pre-stored in the refined water storage tank 9 will pass through the second electric butterfly valve 12, and flow through the defoaming agent delivery pump 6 into the deacidification system, until the defoaming agent delivery pump 6 and the defoaming agent remaining in the pipeline between the defoaming agent delivery pump 6 and the second ball valve 8 are rinsed clean, and then the defoaming agent delivery pump 6 and the second electric butterfly valve 12 are closed.

[0031] The specific method is as follows:

[0032] When foaming occurs in the deacidification system, a first electric butterfly valve opening instruction is sent to the first electric butterfly valve 4 through the first PLC control module, and the first electric butterfly valve 4 receives and executes the first electric butterfly valve opening instruction; a delivery pump opening instruction is sent to the defoaming agent delivery pump 6 through the second PLC control module, and the defoaming agent delivery pump 6 receives and executes the delivery pump opening instruction; a second electric butterfly valve closing instruction is sent to the second electric butterfly valve 12 through the third PLC control module, and the second electric butterfly valve 12 receives and executes the second electric butterfly valve closing instruction; at this time, the first electric butterfly valve 4 and the defoaming agent delivery pump 6 are opened, and the second electric butterfly valve 12 is closed, and the defoaming agent pre-stored in the defoaming agent buffer tank 1 flows through the first one-way valve 2 and the first gate valve 3, then passes through the first electric butterfly valve 4 and the first ball valve 5, and then enters the defoaming agent delivery pump 6 for pressurization; when the pressure of the defoaming agent after pressurization is greater than the pressure of the deacidification system, it will be sequentially delivered to the deacidification system through the second one-way valve 7 and the second ball valve 8 to participate in the defoaming reaction.

[0033] When the foaming phenomenon of the deacidification system disappears or the defoaming agent is added to a preset amount, the third PLC control module sends a second electric butterfly valve opening instruction to the second electric butterfly valve 12, and the second electric butterfly valve 12 receives and executes the second electric butterfly valve opening instruction; subsequently, the first PLC control module sends a first electric butterfly valve closing instruction to the first electric butterfly valve 4, and the first electric butterfly valve 4 receives and executes the first electric butterfly valve closing instruction; it should be noted that the second electric butterfly valve 12 is opened first, and the first electric butterfly valve After the second electric butterfly valve 12 is opened, it is closed to ensure that the inlet of the defoamer delivery pump 6 can be continuously replenished to avoid a vacuum state; then, the desalted water pre-stored in the refined water storage tank 9 flows through the second gate valve 10 and the third one-way valve 11, then passes through the second electric butterfly valve 12, and flows through the defoamer delivery pump 6 to enter the deacidification system, until the defoamer delivery pump 6 and the defoamer remaining in the pipeline between the defoamer delivery pump 6 and the second ball valve 8 are rinsed clean, and then the defoamer delivery pump 6 and the second electric butterfly valve 12 are closed.

[0034] In the utility model, by arranging a refined water storage tank and a second electric butterfly valve, after the defoaming agent is added, the desalted water in the refined water storage tank is used to flush the defoaming agent delivery pump and the defoaming agent remaining in the pipeline, so as to avoid the blockage of the pump and the pipeline due to the flocculation of the defoaming agent, thereby ensuring the subsequent defoaming agent addition operation; by arranging a control unit, the PLC module in the control unit is used to control the electric butterfly valve and the defoaming agent delivery pump respectively, so as to realize the effect of remote signal starting or shutting down the system, thereby greatly reducing the safety risk of the defoaming agent addition process; at the same time, it can ensure the safe and reliable operation of the deacidification system.

[0035] The above embodiment is only one of the implementation methods that can realize the technical solution of the utility model. The scope of protection required by the utility model is not limited only to this embodiment, but also includes within the technical scope disclosed by the utility model, any changes, replacements and other implementation methods that can be easily thought of by any technician familiar with the technical field.

Claims

1. A defoamer adding system, characterized in that: It comprises a defoaming agent buffer tank (1), a first electric butterfly valve (4), a defoaming agent delivery pump (6), a refined water storage tank (9) and a second electric butterfly valve (12); The outlet of the defoamer buffer tank (1) is connected to the inlet of the first electric butterfly valve (4), the outlet of the first electric butterfly valve (4) is connected to the inlet of the defoamer delivery pump (6), and the outlet of the defoamer delivery pump (6) is used to be connected to the defoamer addition port of the deacidification system; The outlet of the purified water storage tank (9) is connected to the inlet of the second electric butterfly valve (12), and the outlet of the second electric butterfly valve (12) is connected between the outlet of the first electric butterfly valve (4) and the inlet of the defoaming agent delivery pump (6).

2. A defoamer adding system according to claim 1, characterized in that: It also includes a first one-way valve (2) and a first gate valve (3); the first one-way valve (2) and the first gate valve (3) are connected in series in sequence between the outlet of the defoaming agent buffer tank (1) and the inlet of the first electric butterfly valve (4).

3. A defoamer adding system according to claim 1, characterized in that: It also includes a first ball valve (5); the first ball valve (5) is arranged between the outlet of the first electric butterfly valve (4) and the inlet of the defoaming agent delivery pump (6).

4. A defoamer adding system according to claim 1, characterized in that: It also includes a second one-way valve (7) and a second ball valve (8); the second one-way valve (7) and the second ball valve (8) are connected in series between the outlet of the defoaming agent delivery pump (6) and the defoaming agent adding port of the deacidification system.

5. A defoamer adding system according to claim 1, characterized in that: The outlet of the refined water storage tank (9) is arranged in two ways, wherein the first outlet is connected to the inlet of the second electric butterfly valve (12), and the second outlet is connected to the flushing water inlet of the defoaming agent buffer tank (1).

6. A defoamer adding system according to claim 5, characterized in that: It also includes a second gate valve (10) and a third one-way valve (11); the second gate valve (10) and the third one-way valve (11) are connected in series between the first outlet and the inlet of the second electric butterfly valve (12).

7. A defoamer adding system according to claim 5, characterized in that: It also comprises a third ball valve (13); the third ball valve (13) is arranged at the second outlet and connected to the flushing water inlet of the defoaming agent buffer tank (1).

8. A defoamer adding system according to claim 1, characterized in that: It also includes a control unit (14); the output end of the control unit (14) is connected to the control ends of the first electric butterfly valve (4), the second electric butterfly valve (12) and the defoaming agent delivery pump (6); wherein the control unit (14) is used to send start and stop instructions to the first electric butterfly valve (4), the second electric butterfly valve (12) or the defoaming agent delivery pump (6).

9. A defoamer adding system according to claim 1, characterized in that: The deacidification system is an absorption tower (19) or a regeneration tower (20).

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