Polycarboxylic acid water reducing agent tail gas multistage purification treatment device

Abstract

The utility model relates to the technical field of chemical industry environmental protection, specifically relates to a kind of polycarboxylate water reducing agent tail gas multistage purification treatment device, including water spray tower, hydrogen peroxide spray tower and alkali spray tower.The utility model overcomes the deficiency of prior art, tail gas sequentially through water spray tower, hydrogen peroxide spray tower and alkali spray tower and is treated by three levels, water spray tower top is equipped with spray head, bottom is equipped with water spray tower circulating pump and polymerization inhibitor charging box, can periodically supplement polymerization inhibitor, cold water coil and temperature sensor are installed in tower, temperature sensor is connected with external cold water system, when temperature exceeds set value (such as 20 ℃), automatically start cooling water circulating pump and cool down, by three-stage spray system, effectively remove acrylic acid and other active small monomer in tail gas, reduce gel generation, prevent pipeline blockage;Temperature control and polymerization inhibitor adding system are set in water spray tower, double inhibition monomer polymerization, significantly improve processing efficiency and system stability.

Description

Technical Field

[0001] This utility model relates to the field of chemical environmental protection technology, specifically a multi-stage purification treatment device for the tail gas of polycarboxylate superplasticizer. Background Technology

[0002] In the production process of polycarboxylate superplasticizers, the raw materials used, such as hydrogen peroxide, acrylic acid, and hydroxyethyl acrylate, have extremely high polymerization activity. During the production process, the exhaust gas carries these small monomers, and once they enter the pipelines and equipment, they are very likely to undergo polymerization reactions inside, forming gel-like substances. These gels will gradually accumulate, causing blockages in the pipelines and equipment systems, which are extremely difficult to clean. In severe cases, they may even force abnormal production shutdowns, causing economic losses and disruption to the production order of the enterprise.

[0003] However, existing exhaust gas treatment systems have obvious defects. On the one hand, they lack effective anti-polymerization measures and cannot prevent small monomers from polymerizing in the system. On the other hand, cooling measures are inadequate and not conducive to exhaust gas treatment. These problems make exhaust gas treatment efficiency extremely low and system operation extremely unstable. More seriously, the existing treatment methods are also prone to causing secondary pollution of volatile organic compounds, which has an adverse impact on the surrounding environment. It is urgent to optimize and upgrade the exhaust gas treatment system.

[0004] To address the problems existing in the above technologies, a multi-stage purification treatment device for polycarboxylate superplasticizer tail gas is proposed. Utility Model Content

[0005] In view of the shortcomings of the prior art, this utility model provides a multi-stage purification treatment device for polycarboxylate superplasticizer tail gas, which overcomes the shortcomings of the prior art and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage purification treatment device for polycarboxylate superplasticizer tail gas, comprising a water spray tower, a hydrogen peroxide spray tower, and an alkali spray tower connected in sequence. The water spray tower, hydrogen peroxide spray tower, and alkali spray tower are respectively equipped with a water spray tower circulation pump, a hydrogen peroxide spray tower circulation pump, and a liquid alkali spray tower circulation pump. These pumps are connected to the internal spraying system of their respective spray towers via pipelines. The water spray tower is equipped with a polymerization inhibitor feeding system, and a cooling system is also provided inside the water spray tower.

[0007] As a preferred embodiment of the present invention, the polymerization inhibitor feeding system includes a polymerization inhibitor feeding tank installed on the water spray tower, a polymerization inhibitor feeding pump whose inlet is connected to the polymerization inhibitor feeding tank via a pipeline, and a polymerization inhibitor aqueous solution shut-off valve installed on the pipeline connected to the polymerization inhibitor feeding tank at the output end of the polymerization inhibitor feeding pump.

[0008] As a preferred technical solution of this utility model, the cooling system includes a cold water coil installed inside the water spray tower, a cold water tank connected to the inlet end of the cold water coil via a pipe, a cold water regulating valve installed on the pipe connecting the return end of the cold water coil to the cold water tank, a cold water circulation pump installed between the inlet end of the cold water coil and the cold water tank, and a temperature sensor, wherein the temperature sensor is signal-connected to the cold water circulation pump.

[0009] As a preferred embodiment of this invention, the temperature sensor is set with a start-up temperature threshold.

[0010] As a preferred embodiment of this utility model, it further includes a sewage tank, and the bottom outlets of the water spray tower, hydrogen peroxide spray tower and alkali spray tower are all connected to the sewage tank through pipelines.

[0011] As a preferred technical solution of this utility model, it also includes a reuse pipeline, one end of which is connected to the sewage tank and the other end is connected to the production system.

[0012] In a preferred embodiment of this invention, the alkaline solution used in the alkaline spray tower is a sodium hydroxide solution.

[0013] As a preferred technical solution of this utility model, the top of the water spray tower, the hydrogen peroxide spray tower and the alkali spray tower are all provided with exhaust ports. The exhaust ports at the top of the spray tower and the hydrogen peroxide spray tower are respectively connected to the lower half of their adjacent spray towers through pipes. The exhaust port of the alkali spray tower is used to connect to the high-altitude discharge pipe, and the high-altitude discharge pipe is equipped with an exhaust fan.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. The three-stage spray system effectively removes reactive small monomers such as acrylic acid from the exhaust gas, reduces gel formation, and prevents pipe blockage. The water spray tower is equipped with a temperature control and polymerization inhibitor addition system, which dually inhibits monomer polymerization and significantly improves treatment efficiency and system stability.

[0016] 2. The treated liquid can be reused in production, realizing resource recycling and reducing operating costs; the overall structure is simple, with a high degree of automation, and is suitable for continuous industrial operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the tail gas treatment of the polycarboxylate superplasticizer of this utility model;

[0018] Figure 2 This is a schematic diagram of the polymerization inhibitor feeding system and cooling system of this utility model.

[0019] In the diagram: 1. Inhibitor feeding tank; 2. Inhibitor feeding pump; 3. Cold water tank; 4. Cold water regulating valve; 5. Cold water circulating pump; 6. Inhibitor aqueous solution shut-off valve; 7. Water spray tower; 8. Water spray tower circulating pump; 9. Hydrogen peroxide spray tower; 10. Hydrogen peroxide spray tower circulating pump; 11. Sewage tank; 12. Liquid alkali spray tower; 13. Liquid alkali spray tower circulating pump; 14. Exhaust gas fan; 15. Cold water coil; 16. Temperature sensor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-2 A multi-stage purification treatment device for polycarboxylate superplasticizer tail gas includes a water spray tower 7, a hydrogen peroxide spray tower 9, and an alkali spray tower 12 connected in sequence. A water spray tower circulation pump 8, a hydrogen peroxide spray tower circulation pump 10, and a liquid alkali spray tower circulation pump 13 are respectively installed on the water spray tower 7, the hydrogen peroxide spray tower 9, and the liquid alkali spray tower 12. The water spray tower 7 is equipped with a water spray tower circulation pump 8, a hydrogen peroxide spray tower circulation pump 10, and a liquid alkali spray tower circulation pump 13. These pumps are connected to the internal spraying system of their respective towers via pipelines. The system includes a polymerization inhibitor feeding system and a cooling system inside the water spray tower 7. The exhaust gas undergoes three-stage treatment by passing through the water spray tower 7, the hydrogen peroxide spray tower 9, and the alkali spray tower 12. The top of the water spray tower 7 is equipped with spray heads, and the bottom is equipped with a water spray tower circulation pump 8 and a polymerization inhibitor feeding tank 1, which can replenish the polymerization inhibitor periodically. The tower is equipped with a cooling water coil 15 and a temperature sensor 16. The temperature sensor 16 is connected to an external cooling water system. When the temperature exceeds the set value (e.g., 20°C), the cooling water circulation pump 5 is automatically started to cool the gas.

[0022] The treated exhaust gas is discharged at high altitude, and the spray liquid is collected and pumped into the sewage tank 11. After further treatment, it is returned to the production system through the reuse pipeline to achieve recycling.

[0023] The polymerization inhibitor feeding system includes a polymerization inhibitor feeding tank 1 installed on the water spray tower 7, a polymerization inhibitor feeding pump 2 connected to the polymerization inhibitor feeding tank 1 via a pipe at the inlet, and a polymerization inhibitor aqueous solution shut-off valve 6 installed on the pipe connecting the output end of the polymerization inhibitor feeding pump 2 to the polymerization inhibitor feeding tank 1. The cooling system includes a cold water coil 15 installed inside the water spray tower 7, a cold water tank 3 connected to the inlet end of the cold water coil 15 via a pipe, a cold water regulating valve 4 installed on the pipe connecting the return end of the cold water coil 15 to the cold water tank 3, a cold water circulation pump 5 installed between the inlet end of the cold water coil 15 and the cold water tank 3, and a temperature sensor 16. The temperature sensor 16 is signal connected to the cold water circulation pump 5.

[0024] The temperature sensor 16 is set with a start-up temperature threshold. It also includes a sewage tank 11. The bottom outlets of the water spray tower 7, hydrogen peroxide spray tower 9, and alkali spray tower 12 are all connected to the sewage tank 11 through pipelines. It also includes a reuse pipeline. One end of the reuse pipeline is connected to the sewage tank 11, and the other end is connected to the production system. The top of the water spray tower 7, hydrogen peroxide spray tower 9, and alkali spray tower 12 are all equipped with exhaust ports. The exhaust ports at the top of the spray tower 7 and hydrogen peroxide spray tower 9 are respectively connected to the lower half of their adjacent spray towers through pipelines. The exhaust port of the alkali spray tower 12 is used to connect to the high-altitude discharge pipe, and the high-altitude discharge pipe is equipped with a tail gas fan 14.

[0025] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage purification treatment device for polycarboxylate superplasticizer tail gas, characterized in that, The system includes a water spray tower (7), a hydrogen peroxide spray tower (9), and an alkali spray tower (12) connected in sequence. The water spray tower (7), the hydrogen peroxide spray tower (9), and the alkali spray tower (12) are respectively equipped with a water spray tower circulation pump (8), a hydrogen peroxide spray tower circulation pump (10), and a liquid alkali spray tower circulation pump (13). The water spray tower circulation pump (8), the hydrogen peroxide spray tower circulation pump (10), and the liquid alkali spray tower circulation pump (13) are respectively connected to the spraying system inside their respective spray towers through pipelines. The water spray tower (7) is equipped with a polymerization inhibitor feeding system, and the water spray tower (7) is also equipped with a cooling system.

2. The multi-stage purification treatment device for polycarboxylate superplasticizer tail gas according to claim 1, characterized in that: The polymerization inhibitor feeding system includes a polymerization inhibitor feeding tank (1) installed on the water spray tower (7), a polymerization inhibitor feeding pump (2) whose inlet is connected to the polymerization inhibitor feeding tank (1) via a pipeline, and a polymerization inhibitor aqueous solution shut-off valve (6) installed on the pipeline connected to the polymerization inhibitor feeding tank (1) at the output end of the polymerization inhibitor feeding pump (2).

3. The multi-stage purification treatment device for polycarboxylate superplasticizer tail gas according to claim 1, characterized in that: The cooling system includes a cold water coil (15) installed inside the water spray tower (7), a cold water tank (3) connected to the inlet of the cold water coil (15) via a pipe, a cold water regulating valve (4) installed on the pipe connecting the return end of the cold water coil (15) and the cold water tank (3), a cold water circulation pump (5) installed between the inlet of the cold water coil (15) and the cold water tank (3), and a temperature sensor (16), wherein the temperature sensor (16) is signal-connected to the cold water circulation pump (5).

4. The multi-stage purification treatment device for polycarboxylate superplasticizer tail gas according to claim 3, characterized in that: The temperature sensor (16) is set with a start-up temperature threshold.

5. The multi-stage purification treatment device for polycarboxylate superplasticizer tail gas according to claim 1, characterized in that: It also includes a sewage tank (11), and the bottom outlets of the water spray tower (7), hydrogen peroxide spray tower (9) and alkali spray tower (12) are all connected to the sewage tank (11) through pipelines.

6. The multi-stage purification treatment device for polycarboxylate superplasticizer tail gas according to claim 5, characterized in that: It also includes a reuse pipeline, one end of which is connected to the sewage tank (11) and the other end is connected to the production system.

7. The multi-stage purification treatment device for polycarboxylate superplasticizer tail gas according to claim 1, characterized in that: The alkaline solution used in the alkaline spray tower (12) is a sodium hydroxide solution.

8. The multi-stage purification treatment device for polycarboxylate superplasticizer tail gas according to claim 1, characterized in that: The top of the water spray tower (7), hydrogen peroxide spray tower (9) and alkali spray tower (12) are all provided with exhaust ports. The exhaust ports at the top of the spray tower (7) and the hydrogen peroxide spray tower (9) are respectively connected to the lower half of their adjacent spray towers through pipes. The exhaust port of the alkali spray tower (12) is used to connect to the high-altitude discharge pipe, and the high-altitude discharge pipe is equipped with a tail gas fan (14).

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