CN216935443U

CN216935443U - A tail gas absorption tower for polycarboxylate water reducing agent is synthetic

Info

Publication number: CN216935443U
Application number: CN202220267375.4U
Authority: CN
Inventors: 石丙千; 顾然然; 程正金
Original assignee: Weihong New Material Technology Co ltd
Current assignee: Weihong New Material Technology Co ltd
Priority date: 2022-02-09
Filing date: 2022-02-09
Publication date: 2022-07-12
Anticipated expiration: 2032-02-09

Abstract

The utility model discloses a tail gas absorption tower for synthesizing a polycarboxylate superplasticizer, which comprises a washing tower, a cyclone demisting tower, an activated carbon box and an overhead exhaust funnel, wherein the washing tower is connected with the cyclone demisting tower; the air outlet of the washing tower is communicated with the air inlet of the cyclone demisting tower, the air outlet of the cyclone demisting tower is communicated with the air inlet of the activated carbon box, the air outlet of the activated carbon box is communicated with the air inlet of the high-altitude exhaust funnel, and the high-altitude exhaust funnel is provided with a fan unit for pumping the air in the activated carbon box to the high-altitude area above the high-altitude exhaust funnel for discharge; the PH value in the washing tower is detected by the PH meter, and the PH value of the alkaline absorption liquid in the washing tower is ensured to be stabilized in a certain interval by matching with the alkali adding pump, so that the control is accurate, the labor is not needed, and the labor cost is reduced; according to the utility model, the cyclone demisting tower is arranged to treat the tail gas absorbed by the water washing tower, so that water vapor and alkali steam are removed, and the tail gas treatment effect is improved.

Description

A tail gas absorption tower for polycarboxylate water reducing agent is synthetic

Technical Field

The utility model relates to the technical field of chemical industry, in particular to a tail gas absorption tower for synthesizing a polycarboxylate superplasticizer.

Background

In the existing polycarboxylic acid synthesis process, acidic waste gas is often generated due to volatilization during temperature rise, and for absorption treatment of the waste gas, a water washing device based on an acid-base absorption principle is usually used, and the waste gas is directly emptied after passing through a water washing tower, so that the waste gas treatment process is too simple; in addition, the tail gas absorption device in the existing polycarboxylic acid synthesis process is only a water washing tower for acid-base absorption, and the addition of alkali liquor is manually and insufficiently controlled by personnel. The subsequent flow of waste gas treatment is imperfect, and alkali is easily discharged along with tail gas, so that new tail gas is brought out.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a tail gas absorption tower for synthesizing a polycarboxylate superplasticizer, and aims to solve the problems of simple process and poor absorption effect in the prior art.

In order to solve the technical problem, the tail gas absorption tower for synthesizing the polycarboxylate superplasticizer provided by the utility model comprises a washing tower, a cyclone demisting tower, an activated carbon box and an overhead exhaust funnel; the air outlet of the washing tower is communicated with the air inlet of the cyclone demisting tower, the air outlet of the cyclone demisting tower is communicated with the air inlet of the activated carbon box, the air outlet of the activated carbon box is communicated with the air inlet of the high-altitude exhaust funnel, and the high-altitude exhaust funnel is provided with a fan unit for pumping the air in the activated carbon box to the high-altitude area above the high-altitude exhaust funnel for discharge; the washing tower is provided with a PH meter for detecting the PH value of the internal alkaline absorption liquid, and one side of the washing tower is provided with an alkaline adding tank for adding the high-concentration alkaline absorption liquid into the washing tower.

Preferably, the washing tower comprises a shell, a liquid storage section for containing alkaline absorption liquid is arranged on the shell, an air inlet pipe is arranged at the lower end of the shell, the air inlet pipe spirally rises in the liquid storage section, a U-shaped section is arranged at the tail end of the air inlet pipe, arc-shaped parts of the U-shaped section are all arranged on the upper side of the liquid level of the alkaline absorption liquid, and an opening part of the U-shaped section is immersed in the alkaline absorption liquid; the liquid storage section is also provided with an alkali adding port, an emptying port for emptying the alkaline absorption liquid in the liquid storage section and an alkaline liquid circulating port; a liquid inlet, a liquid distributor and a filler section are also arranged in the water washing tower from top to bottom; the pH meter extends into the liquid storage section.

Preferably, the inner cavity of the alkali adding tank is communicated with the alkali adding port through an alkali adding pipeline, and an alkali adding pump and a one-way valve are arranged on the alkali adding pipeline.

Preferably, a stirring motor is arranged in the alkali adding tank, and a stirring rod is arranged on an output shaft of the stirring motor.

After adopting the structure, compared with the prior art, the utility model has the following advantages: the PH value in the washing tower is detected by the PH meter, and the PH value of the alkaline absorption liquid in the washing tower is ensured to be stabilized in a certain interval by matching with the alkali adding pump, so that the control is accurate, the labor is not needed, and the labor cost is reduced; according to the utility model, the cyclone demisting tower is arranged to treat the tail gas absorbed by the water washing tower, so that water vapor and alkali vapor are removed, and the tail gas treatment effect is improved; the active carbon adsorption box is arranged to absorb residual other waste gas, so that the tail gas treatment effect is further improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of another embodiment of the present invention;

FIG. 3 is a schematic view of the structure of a water washing column of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 3, the tail gas absorption tower for synthesizing the polycarboxylate superplasticizer of the utility model comprises a washing tower 1, a cyclone demisting tower 2, an activated carbon box 3 and an overhead exhaust funnel 4; the gas outlet of the washing tower 1 is communicated with the gas inlet of the cyclone demisting tower 2, the gas outlet of the cyclone demisting tower 2 is communicated with the gas inlet of the activated carbon box 3, the gas outlet of the activated carbon box 3 is communicated with the gas inlet of the high-altitude exhaust funnel 4, and the high-altitude exhaust funnel 4 is provided with a fan unit 41 for pumping the gas in the activated carbon box 3 to the high-altitude area above the high-altitude exhaust funnel 4 for discharge; a PH meter 11 for detecting the PH value of the internal alkaline absorption liquid is arranged on the washing tower 1, and an alkaline adding tank 5 for adding the high-concentration alkaline absorption liquid into the washing tower 1 is arranged on one side of the washing tower 1; when the device works specifically, the tail gas absorbed by the alkaline absorption liquid is treated by the cyclone demisting tower 2, so that water vapor and alkaline steam are removed, and the tail gas treatment effect is improved; other residual waste gas in the tail gas is absorbed through the activated carbon box 3, and the treatment effect of the tail gas is further improved.

The water washing tower 1 comprises a shell 12, a liquid storage section 124 for containing alkaline absorption liquid is arranged on the shell 12, an air inlet pipe 13 is arranged at the lower end of the shell, the air inlet pipe 13 spirally rises in the liquid storage section 124, a U-shaped section 131 is arranged at the tail end of the air inlet pipe 13, the arc-shaped parts of the U-shaped section 131 are all arranged on the upper side of the liquid level of the alkaline absorption liquid, and the opening part of the U-shaped section 131 is immersed in the alkaline absorption liquid; the liquid storage section 124 is also provided with an alkali adding port 14, an emptying port 15 for emptying the alkaline absorption liquid in the liquid storage section 124 and an alkaline liquid circulating port 16; a liquid inlet 121, a liquid distributor 122 and a filler section 123 are also arranged in the water washing tower 1 from top to bottom; the pH meter 11 extends into the liquid storage section 124; during specific work, tail gas lets in from intake pipe 13, because of intake pipe 13 is screw thread form spiral rising in stock solution section 124 as shown in fig. 3, and intake pipe 13 submergence is in alkaline absorption liquid, the heat of the tail gas that lets in is changeed and is absorbed by alkaline absorption liquid, the influence of the high temperature of tail gas to the absorption effect has been avoided, and the design through intake pipe 13 terminal U type section 131, carry out the water seal to intake pipe 13, the gas tightness is good, make tail gas discharge in alkaline absorption liquid simultaneously, the absorption effect is better.

The inner cavity of the alkali adding tank 5 is communicated with the alkali adding port 14 through an alkali adding pipeline 51, and an alkali adding pump 52 and a one-way valve 53 are arranged on the alkali adding pipeline 51; during specific work, the alkaline absorption liquid is stored through the arranged liquid storage section 124 so as to be convenient for the measurement of the pH meter 11, when the pH meter 11 detects that the pH value of the alkaline absorption liquid in the washing tower 1 is smaller than a set value, the alkali adding pump 52 starts to convey the high-concentration alkaline absorption liquid in the alkali adding tank 5 into the liquid storage section 124 until the measured value of the pH meter 11 is larger than the set value, so that the concentration of an alkaline compound is ensured to be stabilized in a certain interval, the better absorption effect is achieved, the alkaline absorption liquid cannot be easily discharged along with tail gas due to overhigh concentration, and the set value is preferably 9 in the embodiment; meanwhile, automatic work of the alkali adding pump 52 is used for replacing human alkali adding, labor cost is saved, and the alkali adding amount precision is high.

A stirring motor 54 is arranged in the alkali adding tank 5, and a stirring rod is arranged on an output shaft of the stirring motor 54; the stirring motor 54 can fully dissolve the alkaline compound in the alkaline adding tank 5, thereby avoiding waste.

The specific working process of this embodiment is as follows, firstly, sufficient alkaline absorption liquid is introduced into the liquid storage section 124 through the evacuation port 15, so that the liquid level of the alkaline absorption liquid is as shown in fig. 3, the opening part of the U-shaped section 131 is immersed, then the evacuation port 15 is closed, the alkaline absorption liquid is conveyed to the liquid inlet 121 from the alkaline liquid circulation port 16 through the water pump for circulation, then the tail gas is introduced into the gas inlet pipe 13, the tail gas is cooled through the gas inlet pipe 13 and then fully reacts with the alkaline absorption liquid, meanwhile, the PH meter 11 measures the PH value of the alkaline absorption liquid at any moment, and the alkaline absorption liquid is matched with the alkali adding pump 52 to ensure that the alkaline absorption liquid is stable in a certain interval; acid material is in the washing tower 1 in the tail gas by the neutralization absorption back, and remaining tail gas lets in and gets rid of steam, alkali steam in whirlwind defogging tower 2, lets in other remaining waste gas of absorption in the activated carbon box 3 afterwards, and last high altitude aiutage 4 is discharged tail gas pumping to the high altitude, has greatly reduced the pollution of tail gas, and the absorption treatment efficiency of tail gas is high, and the absorption effect is good, practices thrift the cost of labor simultaneously, and personnel operate more convenient and fast.

The above description is only given for the preferred embodiment of the utility model, but it should not be understood as limiting the claims, and other variations of the structure of the utility model are possible, not limited to the above structure. In general, all changes which come within the scope of the utility model as defined by the independent claims are intended to be embraced therein.

Claims

1. A tail gas absorption tower for synthesis of a polycarboxylic acid water reducing agent is characterized by comprising a washing tower (1), a cyclone demisting tower (2), an activated carbon box (3) and an overhead exhaust funnel (4); the air outlet of the washing tower (1) is communicated with the air inlet of the cyclone demisting tower (2), the air outlet of the cyclone demisting tower (2) is communicated with the air inlet of the activated carbon box (3), the air outlet of the activated carbon box (3) is communicated with the air inlet of the high-altitude exhaust funnel (4), and the high-altitude exhaust funnel (4) is provided with a fan unit (41) for pumping the air in the activated carbon box (3) to be discharged to the high-altitude area above the high-altitude exhaust funnel (4); be equipped with on the scrubbing tower (1) and be used for detecting PH meter (11) of inside alkaline absorption liquid pH value, scrubbing tower (1) one side is equipped with and is used for adding alkali jar (5) of adding high concentration alkaline absorption liquid to its inside.

2. The tail gas absorption tower for synthesis of the polycarboxylate superplasticizer according to claim 1, wherein the water washing tower (1) comprises a shell (12), a liquid storage section (124) for containing alkaline absorption liquid is arranged on the shell (12), an air inlet pipe (13) is arranged at the lower end of the shell, the air inlet pipe (13) spirally rises in the liquid storage section (124), a U-shaped section (131) is arranged at the tail end of the air inlet pipe (13), the arc-shaped parts of the U-shaped section (131) are arranged on the upper side of the liquid level of the alkaline absorption liquid, and the opening part of the U-shaped section (131) is immersed in the alkaline absorption liquid; the liquid storage section (124) is also provided with an alkali adding port (14), an emptying port (15) for emptying the alkali absorption liquid in the liquid storage section (124) and an alkali liquid circulating port (16); a liquid inlet (121), a liquid distributor (122) and a filler section (123) are also arranged in the water washing tower (1) from top to bottom; the PH meter (11) extends into the liquid storage section (124).

3. The tail gas absorption tower for synthesis of the polycarboxylate water reducer as claimed in claim 2, wherein an inner cavity of the alkali adding tank (5) is communicated with the alkali adding port (14) through an alkali adding pipeline (51), and an alkali adding pump (52) and a one-way valve (53) are arranged on the alkali adding pipeline (51).

4. The tail gas absorption tower for synthesis of the polycarboxylate superplasticizer according to claim 1, wherein a stirring motor (54) is arranged in the alkali adding tank (5), and a stirring rod is arranged on an output shaft of the stirring motor (54).