CN105214463A - A kind of processing method of aliphatic hydroxyl sulphonate water reducer process gas - Google Patents
A kind of processing method of aliphatic hydroxyl sulphonate water reducer process gas Download PDFInfo
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- CN105214463A CN105214463A CN201510623118.4A CN201510623118A CN105214463A CN 105214463 A CN105214463 A CN 105214463A CN 201510623118 A CN201510623118 A CN 201510623118A CN 105214463 A CN105214463 A CN 105214463A
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Abstract
The invention provides a kind of processing method of aliphatic hydroxyl sulphonate water reducer process gas, the method of the invention emission-control equipment used comprises spray tower for waste gas, waste gas absorption groove and aiutage, connected by pipeline between three, be provided with one section of packing layer in described spray tower for waste gas, in spray tower for waste gas and waste gas absorption groove, solution be housed; Described processing method comprises: process gas is introduced into spray tower for waste gas; After spray tower for waste gas, process gas is fed in waste gas absorption groove; 15 meters of high altitude discharges are delivered to through aiutage after fluid-tight absorbs.The effect that processing method of the present invention compares traditional water or buck absorption will exceed a lot; Combined by the vent gas treatment mode of spray and these two kinds of forms of fluid-tight, promote the absorption efficiency for waste gas further; Sodium metabisulfite solution for absorbing acetone and formaldehyde can use as the synthesis material of water reducer, can not cause secondary pollution.
Description
Technical field
The present invention relates to a kind of processing method of aliphatic hydroxyl sulphonate water reducer process gas.
Background technology
Aliphatic hydroxyl sulphonate water reducer is with acetone, formaldehyde, sulphite etc. for main raw material(s), obtains under alkaline matter catalysis through oversulfonate and condensation.It has, and water-reducing rate is high, cheap, production technology simple, without advantages such as bleeds.But due in its raw material, acetone and formaldehyde are all the materials of highly volatile, in process of production, along with stirring and exothermic heat of reaction, a large amount of harmful exhaust effusion reaction systems will be had.
For this problem, in aliphatic hydroxyl sulphonate water reducer production line, can set up flue gas leading above reactor, the process gas unification produced by reactor is sent to emission-control equipment and is processed.The emission-control equipment adopted at present for the process gas of aliphatic hydroxyl sulphonate water reducer is at present mainly water spray system and absorbent charcoal adsorber.Wherein water spray system is respectively 75% and 85% for the uniprocessing efficiency of acetone and formaldehyde, and single-stage is difficult to meet environmental requirement, therefore usually adopts the mode of plural serial stage, but the treatment effeciency of the limit usually can not more than 96%.And the treatment effeciency of absorbent charcoal adsorber is higher, usually can reach more than 99%, but the active carbon in device needs often to change, and the process of the active carbon changed is also very loaded down with trivial details.
The process gas process of aliphatic hydroxyl sulphonate water reducer is a difficult problem of environmental protection always, along with the extensive development of infrastructure construction, concrete consumption rises year by year, and aliphatic hydroxyl sulphonate water reducer is as one of main water reducer agent kind, and its demand also increases day by day.Therefore a kind of simple and effective process gas processing method of exploitation is needed badly, to solve the environmental burden in industrialization process.
Summary of the invention
For in prior art in order to improve the treatment effeciency of aliphatic hydroxyl sulphonate water reducer process gas, cause the problem that waste gas processing method is loaded down with trivial details, the invention provides a kind of processing method of aliphatic hydroxyl sulphonate water reducer process gas.
The processing method of a kind of aliphatic hydroxyl sulphonate water reducer process gas of the present invention: the method emission-control equipment used comprises spray tower for waste gas, waste gas absorption groove and aiutage, connected by pipeline between three, be provided with one section of packing layer in described spray tower for waste gas, in spray tower for waste gas and waste gas absorption groove, solution be housed; The treating method comprises: process gas is introduced into spray tower for waste gas; After spray tower for waste gas, process gas is fed in waste gas absorption groove; 15 meters of high altitude discharges are delivered to through aiutage after fluid-tight absorbs;
Solution in described spray tower for waste gas and waste gas absorption groove is the aqueous solution of sodium pyrosulfite;
Packing layer material in described spray tower for waste gas is hollow polypropylene microballoon;
Described height liquid seal is the difference in height of the gas outlet in waste gas absorption groove to liquid level.
The mass fraction of the aqueous solution of sodium pyrosulfite of the present invention is 10 ~ 30%, when concentration higher than 30% time, when temperature is lower, solution has the risk separating out pyrosulfurous acid sodium crystal, and then injury device; Concentration lower than 10% time, assimilation effect is poor, and needs frequently to change solution.
Packing layer THICKNESS CONTROL of the present invention is between 0.5 ~ 1.0 meter, and packing layer thickness is larger, and waste gas absorption effect is better, but the transport resistance of gas can strengthen, and is unfavorable for the operation of equipment; Packing layer thickness is less, and the assimilation effect of waste gas is deteriorated.
Spray tower for waste gas middle section of the present invention solution spraying amount is 20 ~ 100kg/ (m
2* min), spray flux is larger, and waste gas absorption effect is better, but corresponding energy consumption can increase; Spray flux is too small, then the assimilation effect of waste gas is poor.
Height liquid seal in waste gas absorption groove of the present invention is between 0.5 ~ 1 meter, and height liquid seal is higher than 1 meter, then fluid-tight pressure is excessive, is unfavorable for the effusion of waste gas, and height liquid seal is less than 0.5 meter, then assimilation effect is poor.
In spray tower for waste gas of the present invention and waste gas absorption groove, the pH value range of solution is no more than 8.0, when pH reaches 8.0, needs to use fresh solution to replace.
After described absorption waste gas pH about 8.0 solution replaced by fresh solution after, may be used for the synthetic raw material of aliphatic hydroxyl sulphonate water reducer, can not secondary pollution be produced.
The present invention mainly utilizes sodium pyrosulfite in aqueous can with the primary waste gases acetone in aliphatic hydroxyl sulphonate water reducer production process and formaldehyde generation fast chemical reaction, thus efficient absorption waste gas, the effect that the method compares traditional water or buck absorption will exceed a lot; The present invention is combined by the vent gas treatment mode of spray and these two kinds of forms of fluid-tight in addition, promotes the absorption efficiency for waste gas further; And still can use as the synthesis material of aliphatic hydroxyl sulphonate water reducer for the sodium metabisulfite solution absorbing acetone and formaldehyde, can not secondary pollution be caused.
Accompanying drawing illustrates:
Fig. 1 is aliphatic hydroxyl sulphonate water reducer process gas processing method Structure and Process schematic diagram.
1 spray tower for waste gas in figure, 2 waste gas absorption grooves, 3 aiutages, 4 process gas imports, 5 packing layers, 6 mouth sprays, the solution in 7 spray tower for waste gas and waste gas absorption groove, 8 circulating pumps, 9 waste gas outlets after spray tower for waste gas process, 10 waste gas gas outlets, the gas outlet of 11 aiutages.
Detailed description of the invention
In aliphatic hydroxyl sulphonate water reducer production process, waste gas enters spray tower for waste gas 1 by process gas import 4, one section of packing layer 5 is had in spray tower for waste gas 1, and spray tower for waste gas bottom storage has solution 7, solution 7 is sprayed by mouth spray 6 under the driving of circulating pump 8, and in spray tower for waste gas 1, carries out gas-liquid contact with process gas and absorb process gas; Process gas, after spray tower for waste gas 1 processes, via the waste gas outlet 9 after spray tower for waste gas process and the waste gas gas outlet 10 in waste gas absorption groove 2, is entered waste gas absorption groove 2, after the absorption of waste gas absorption groove 2, is discharged by aiutage 3 by gas outlet 11.
Adopt above-mentioned processing method, regulate the height liquid seal of the bed stuffing height of solution concentration, spray column, spray flux and waste gas absorption groove, the emission-control equipment with different exhaust-gas treatment effects can be formed.
Following table gives different embodiments:
The parameter of the different embodiment of table 1
Under different embodiment, waste gas is adopted to test.In the waste gas adopted, acetone concentration is above standard 10 times, and concentration of formaldehyde is above standard 20 times, and exhaust gas parameters is as shown in the table:
The composition of table 2 test waste gas
Concrete waste gas test result is as follows:
Table 3 waste gas test result
The processing mode of embodiment 1 ~ 10 can realize the qualified discharge of acetone and formaldehyde, and treatment effeciency has all exceeded 99%.Data are shown by analyzing, the height liquid seal that can find to improve the concentration of sodium metabisulfite solution, the spray flux increasing spray column, the thickness improving spray column packing layer and increase absorption plant can reduce the concentration of emission of waste gas, increases the treatment effeciency of waste gas.
Comparative example 1 and 2 shows, the absorption cell of sodium metabisulfite solution contributes to the treatment effeciency promoting waste gas further, and height liquid seal is larger, and exhaust-gas treatment effect is better; The Data Comparison of embodiment 1 and comparative example 2 finds, after cancelling absorption cell, although waste gas remains qualified discharge, concentration of emission adds nearly 2 times.
Comparative example 3 and 4 shows, after reducing spray flux, the treatment effeciency of waste gas reduces; After cancelling spray, toxic emission severe overweight, the treatment effeciency of acetone only only has 66.86%, and the treatment effeciency of formaldehyde also only has 85.4%, and this absolutely proves the importance of spray.
Comparative example 5 and 6 shows, reduces the packing layer thickness in spray equipment, and the treatment effeciency of waste gas reduces; After cancelling the packing layer in spray equipment, the concentration of toxic emission adds nearly 4 times.This illustrates that adding of packing layer contributes to increasing the area of gas-liquid contact, thus promotes absorption efficiency.
Comparative example 7 and 8 shows, reduce spray with after sodium metabisulfite solution concentration, the absorption efficiency of waste gas significantly reduces; When adopting after water consumption substitution pyrosulfurous acid solution sprays, toxic emission severe overweight, this absolutely proves that sodium metabisulfite solution has extraordinary assimilation effect to acetone and formaldehyde gas.
Find by contrasting commercially available 2 kinds of device for absorbing tail gas, 2 grades of water spray systems cannot reach the requirement of qualified discharge, although and absorbent charcoal adsorber can realize qualified discharge, treatment effeciency compare processing method provided by the present invention compare poor.
In sum, the processing method of aliphatic hydroxyl sulphonate water reducer process gas provided by the present invention has higher treatment effeciency, and spray and absorbing liquid may be used for the synthesis material of aliphatic water reducing agent, can not cause secondary pollution, and simple in equipment, easy to operate.
Claims (6)
1. the processing method of an aliphatic hydroxyl sulphonate water reducer process gas, it is characterized in that: emission-control equipment used comprises spray tower for waste gas (1), waste gas absorption groove (2) and aiutage (3), connected by pipeline between three, be provided with one section of packing layer (5) in described spray tower for waste gas, in spray tower for waste gas (1) and waste gas absorption groove (2), solution be housed; Described processing method comprises: process gas is introduced into spray tower for waste gas (1); After spray tower for waste gas (1), process gas is fed in waste gas absorption groove (2); 15 meters of high altitude discharges are delivered to through aiutage (3) after fluid-tight absorbs;
Solution in described spray tower for waste gas (1) and waste gas absorption groove (2) is the aqueous solution of sodium pyrosulfite;
Described packing layer (5) material is hollow polypropylene microballoon;
Described height liquid seal is the difference in height of the gas outlet (10) in waste gas absorption groove to liquid level.
2. the processing method of process gas according to claim 1, is characterized in that, the mass fraction of the aqueous solution of described sodium pyrosulfite is 10 ~ 30%.
3. the processing method of process gas according to claim 1, is characterized in that, described packing layer (5) THICKNESS CONTROL is between 0.5 ~ 1.0 meter.
4. the processing method of process gas according to claim 1, is characterized in that, described spray tower for waste gas (1) middle section solution spraying amount is 20 ~ 100kg/ (m
2* min).
5. the processing method of process gas according to claim 1, is characterized in that, described height liquid seal is between 0.5 ~ 1 meter.
6. the processing method of process gas according to claim 1, is characterized in that, the pH value range of described spray tower for waste gas (1) and the middle solution of waste gas absorption groove (2) is no more than 8.0.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107573472A (en) * | 2017-08-31 | 2018-01-12 | 浙江吉盛化学建材有限公司 | A kind of production technology of aliphatic water reducing agent |
| CN110917858A (en) * | 2019-12-13 | 2020-03-27 | 安徽卓锐三维科技有限公司 | Flue gas purification device for laser printing |
| CN113926283A (en) * | 2021-10-19 | 2022-01-14 | 科之杰新材料集团河南有限公司 | Treatment method and treatment device for waste gas generated in production of aliphatic water reducing agent |
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| CN103691268A (en) * | 2013-12-25 | 2014-04-02 | 华纺股份有限公司 | Method and device for treating waste gas generated by printing and dyeing wastewater |
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| CN201551948U (en) * | 2009-11-24 | 2010-08-18 | 山东聊城鲁西化工第六化肥有限公司 | Tail gas absorption device of methane chloride generating tower |
| CN103691268A (en) * | 2013-12-25 | 2014-04-02 | 华纺股份有限公司 | Method and device for treating waste gas generated by printing and dyeing wastewater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107573472A (en) * | 2017-08-31 | 2018-01-12 | 浙江吉盛化学建材有限公司 | A kind of production technology of aliphatic water reducing agent |
| CN107573472B (en) * | 2017-08-31 | 2019-10-29 | 浙江吉盛化学建材有限公司 | A kind of production technology of aliphatic water reducing agent |
| CN110917858A (en) * | 2019-12-13 | 2020-03-27 | 安徽卓锐三维科技有限公司 | Flue gas purification device for laser printing |
| CN113926283A (en) * | 2021-10-19 | 2022-01-14 | 科之杰新材料集团河南有限公司 | Treatment method and treatment device for waste gas generated in production of aliphatic water reducing agent |
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| CN105214463B (en) | 2018-07-20 |
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