CN204522718U - Hydrochloric acid tank hydrogen chloride tail gas treating apparatus - Google Patents
Hydrochloric acid tank hydrogen chloride tail gas treating apparatus Download PDFInfo
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- CN204522718U CN204522718U CN201520126325.4U CN201520126325U CN204522718U CN 204522718 U CN204522718 U CN 204522718U CN 201520126325 U CN201520126325 U CN 201520126325U CN 204522718 U CN204522718 U CN 204522718U
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- hydrochloric acid
- hydrogen chloride
- acid tank
- tail gas
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Abstract
The utility model relates to a kind of hydrochloric acid tank hydrogen chloride tail gas treating apparatus, mainly solves the problem that in prior art, treatment effeciency is lower.The utility model is by adopting a kind of hydrochloric acid tank hydrogen chloride tail gas treating apparatus, it is characterized in that hydrochloric acid tank (3) top exit pipeline is connected with blower fan (5) entrance, blower fan (5) outlet is at least divided into two-way, one tunnel is connected with absorption tower A air inlet, another road is connected with absorption tower B air inlet, absorption tower A is all connected with lye tank (vat) (14) with the top exit pipeline of absorption tower B, lye tank (vat) (14) top is provided with blow-down pipe, absorption tower A and B top, absorption tower are equipped with moisturizing pipeline, liquid discharge tube line is equipped with bottom absorption tower A and absorption tower B, the technical scheme that described every bar liquid discharge tube line is all connected with hydrochloric acid tank (3) solves the problems referred to above preferably, can be used in the process of hydrochloric acid tank hydrogen chloride tail gas.
Description
Technical field
The utility model relates to a kind of hydrochloric acid tank hydrogen chloride tail gas treating apparatus.
Background technology
Hydrochloric acid (the HCl aqueous solution) is important industrial chemicals, and world's hydrochloric acid annual production about 2,000 ten thousand tons, commercially available hydrochloric acid run-of-the-mill mark is 37%.Hydrochloric acid has very strong volatility, and the steam effect in the hydrogen chloride gas volatilized and air forms hydrochloric acid droplet, so can see acid mist.The hydrogen chloride gas cognition volatilized causes high risks to health, also can cause the environmental problem such as water pollution and soil pollution.
Patent CN 20114766 discloses the complete treatment facility of a kind of hydrogen chloride and SO 2 tail gas, and this complete set of equipments adopts water or watery hydrochloric acid spray-absorption institute gas containing hydrogen chloride in chlorine hydride absorption system, but after absorbing, tail gas is difficult to qualified discharge.
Patent CN101648104A discloses a kind of recovery process technology of hydrogen chloride tail gas, the process of hydrogen chloride tail gas is carried out by being together in series in three absorption towers and a neutralizing tower, but in this technology, need to arrange the equipment such as cooler and drier, and need the strict temperature controlling absorbent in absorption tower, complex process, invests high.
The hydrogen chloride gas volatilized for hydrochloric acid tank at present lacks a kind of directly efficient treating apparatus.
Utility model content
Technical problem to be solved in the utility model is the problem that in prior art, treatment effeciency is lower, provides a kind of new hydrochloric acid tank hydrogen chloride tail gas treating apparatus.This device is used for, in the process of hydrochloric acid tank hydrogen chloride tail gas, having the advantage that treatment effeciency is higher.
For solving the problem, the technical solution adopted in the utility model is as follows: a kind of hydrochloric acid tank hydrogen chloride tail gas treating apparatus, it is characterized in that hydrochloric acid tank (3) top exit pipeline is connected with blower fan (5) entrance, blower fan (5) outlet is at least divided into two-way, one tunnel is connected with absorption tower A air inlet, another road is connected with absorption tower B air inlet, absorption tower A is all connected with lye tank (vat) (14) with the top exit pipeline of absorption tower B, lye tank (vat) (14) top is provided with blow-down pipe, absorption tower A and B top, absorption tower are equipped with moisturizing pipeline, liquid discharge tube line is equipped with bottom absorption tower A and absorption tower B, described every bar liquid discharge tube line is all connected with hydrochloric acid tank (3).
In technique scheme, preferably, described lye tank (vat) (14) top is provided with blow-down pipe, and blow-down pipe is provided with sampling line.
In technique scheme, preferably, the pipeline that described blower fan (5) outlet line is connected with absorption tower A or absorption tower B air inlet is equipped with branch line, and described branch line is connected with the top exit pipeline of absorption tower A or absorption tower B.
In technique scheme, preferably, be equipped with liquid discharge tube line bottom described absorption tower A and absorption tower B, every bar liquid discharge tube line is provided with discharging pump, the hydrochloric acid not reaching concentration requirement is back to the top of respective absorption tower, the hydrochloric acid reaching concentration requirement is delivered to hydrochloric acid tank.
In technique scheme, preferably, the pipeline that described hydrochloric acid tank (3) top exit pipeline is connected with blower fan (5) entrance is provided with micro-pressure sensor (7), and absorption tower A and absorption tower B bottom liquid discharge pipe are equipped with concentration of hydrochloric acid meter.
In technique scheme, preferably, described absorption tower A and absorption tower B is equipped with liquid level gauge.
In technique scheme, preferably, described absorption tower A and absorption tower B comprises gas distributor, packing material absorbing district, spray district and mist eliminator from bottom to top successively.
This patent due to have employed in two-stage absorption tower, absorbing liquid EGR, alkali lye and etc. measure, effectively can process the escaping gas that hydrochloric acid tank Big and Small Breath produces, device floss hole arranges sample valve, can regularly detect exhaust gas component, to guarantee that device discharge reaches the emission request of environmental protection index.The treating apparatus technique that this patent describes is simple, and can realize continuous absorption operation, good economy performance, achieves good technique effect.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of device described in the utility model.
In Fig. 1, 1 is absorption tower A, 2 is absorption tower B, 3 is hydrochloric acid tank, 4 return tank valve for absorption tower B, 5 is blower fan, 6 is absorption tower B air intake valve, 7 is micro-pressure sensor, 8 is absorption tower B concentration of hydrochloric acid meter, 9 is absorption tower B root valve, 10 is absorption tower B discharging pump, 11 is absorption tower B return valve, 12 is absorption tower B liquid level gauge, 13 is absorption tower B switch valve II, 14 is lye tank (vat), 15 is sample valve, 16 is emptying valve, 17 is absorption tower B moisturizing valve, 18 to give vent to anger valve for absorption tower B, 19 is absorption tower B switch valve I, 20 is absorption tower A switch valve I, 21 to give vent to anger valve for absorption tower A, 22 is absorption tower A moisturizing valve, 23 is absorption tower A liquid level gauge, 24 is absorption tower A switch valve II, 25 is absorption tower A return valve, 26 is absorption tower A root valve, 27 is absorption tower A air intake valve, 28 is absorption tower A discharging pump, 29 is absorption tower A concentration of hydrochloric acid meter, 30 return tank valve for absorption tower A, 31 is clear water.
Below by embodiment, the utility model is further elaborated, but is not limited only to the present embodiment.
Detailed description of the invention
[embodiment 1]
The hydrogen chloride gas that volatilizes for the treatment of hydrochloric acid tank of device as shown in Figure 1, and hydrogen chloride gas can be treated as concentrated hydrochloric acid, recycle, and make the tail gas of discharge meet national standard requirement.
The device that this patent describes establishes two-stage absorption tower and one-level alkali neutralized system, what in tower, absorbing liquid concentration of hydrochloric acid was high is first grade absorption tower, when concentration of hydrochloric acid reaches instructions for use, by hydrochloric acid in tower by transport pump to tank field, fill into clear water subsequently, switch valve using this tower as two-level absorption tower.
Two-stage absorption tower is the main device carrying out hydrogen chloride tail gas absorption, first order absorption tower is by the most of absorbing hydrogen chloride gas in tail gas, enter two-level absorption tower subsequently again to absorb, remaining gas deepens process in alkali lye neutralized system, discharges qualified tail gas.Along with the continuous rising of first grade absorption tower concentration of hydrochloric acid, its absorption efficiency can significantly reduce, and the gas chlorination hydrogen concentration of discharging from first order absorption tower top can significantly increase, and now two-level absorption tower will play Main Function.After the concentration of hydrochloric acid of first grade absorption tower reaches service condition, by hydrochloric acid transport pump in tower to hydrochloric acid tank, and fill into clear water.Switching this tower is subsequently two-level absorption tower, and former two-level absorption tower is first grade absorption tower.
The hydrogen chloride gas volatilized by hydrogen chloride storage tank is delivered to absorption tower and carries out spray-absorption under the effect of blower fan.Absorption tower comprises gas distributor, packing area, spray district and mist eliminator from top to bottom successively.Gas distributor makes the hydrogen chloride gas entering absorption tower upwards flow equably, contacts well with absorbing liquid.In packing area, the absorbing liquid heat and mass of hydrogen chloride gas and spray, obtains hydrochloric acid.Carry a large amount of liquid secretly in the air-flow risen, the mist eliminator at top, absorption tower can ensure the drying property flowing out hydrogen chloride gas in this grade of absorption tower, thus carries out the absorption operation of next stage efficiently.In tower, liquid level is monitored by liquid level gauge.
Absorbing liquid EGR comprises discharging pump at the bottom of concentration of hydrochloric acid meter, valve and tower.Certain density concentrated hydrochloric acid can be obtained by absorbing liquid EGR.Concentration of hydrochloric acid meter is used to detect the hydrochloric acid flowed out bottom absorption tower, when concentration meets the requirements, hydrochloric acid pumped back hydrochloric acid tank.When concentration is undesirable, hydrochloric acid pumped back absorption tower top entry, continues on for spray-absorption.
Alkali lye neutralized system comprises lye tank (vat) and sample valve.For ensureing the carrying out of neutralization reaction, after two-stage absorbs, unabsorbed hydrogen chloride gas passes into bottom lye tank (vat), through neutralization and up to standard by sample valve inspection by sampling after, enter air, by the detection of gas sampled, alkali lye in lye tank (vat) regularly replaced.
Implementing procedure is:
Assuming that absorption tower A is as first grade absorption tower, absorption tower B is as two-level absorption tower, and all deposited a certain amount of water in tower as absorbing liquid, the absorbing liquid hydrogen chloride gas that self-loopa spray-absorption enters in tower, all electrically operated valves are initially closed condition.
When hydrochloric acid tank 3 internal cause Big and Small Breath produces hydrogen chloride gas, micro-pressure sensor 7 detects that pressure changes, after reaching setting initiation value, blower fan 5 starts, synchronous spray system of opening absorption tower A and absorption tower B, absorption tower A opens valve 25,26, start discharging pump 28, absorption tower B opens valve 9,11, start discharging pump 10.
While fan starting, open valve 27,20,13,18, gas evenly upwards flows under the effect of porch, absorption tower gas distributor, converges in inner-tower filling material uptake zone with the absorbing liquid of spray.Discharge and self-loopa in tower at the bottom of tower after absorbing liquid absorbing hydrogen chloride gas.Unabsorbed gases upwards by mist eliminator, flows out after isolating the liquid carried secretly in air-flow, enters bottom the B of absorption tower in tower, and in tower B, secondary spraying absorbs, and gas enters lye tank (vat) 14 subsequently and neutralizes, and remaining tail gas is disposed to air after emptying valve 16.
Hydrochloric acid in first grade absorption tower tower A carries out Concentration Testing by absorption tower A concentration of hydrochloric acid meter 29.If when its concentration reaches instructions for use, then open absorption tower A root valve 26, absorption tower A returns tank valve 30, hydrochloric acid is delivered to hydrochloric acid tank by absorption tower A bottom discharge pump 28, fills into clear water subsequently.In tower, liquid level is monitored by liquid level gauge 23.
After moisturizing, switch the operation of absorption tower A and absorption tower B, using absorption tower B higher for concentration of hydrochloric acid as first grade absorption tower, absorption tower A is then as two-level absorption tower.If now general mood starts, be then open mode by gas phase valve 6,19,24,21, gas phase valve 13,18,20,27 is closed condition.Make gas first in the B of absorption tower, enter absorption tower A after spray-absorption, and finally enter in lye tank (vat) 14 and rear discharge.Concentration of hydrochloric acid meter 8 is established, equally for concentration of hydrochloric acid in monitoring tower bottom the B of absorption tower.After concentration of hydrochloric acid reaches instructions for use in the B of absorption tower, then open valve 9,4, send into hydrochloric acid tank by discharging pump 10.To fill into after clear water the tower-like state of switch dual again subsequently.
Device blow-down pipe arranges and adopts mouth 15, for taken at regular intervals device exhaust hydrogen cloride concentration, guarantees that the tail gas discharged meets national standard requirement.
The hydrogen chloride tail gas treating apparatus that this patent describes adopts PLC (programmable logic controller (PLC)) automatically to control, and according to concentration of hydrochloric acid meter 8,29 switch valve state, the startup of blower fan 5 is then controlled by micro-pressure sensor 7.
In the alkali lye neutralized system that this patent describes, concentration of lye answers periodic monitoring, to ensure after-treatment effect, needs to change in time when concentration of lye is lower.
Claims (7)
1. a hydrochloric acid tank hydrogen chloride tail gas treating apparatus, it is characterized in that hydrochloric acid tank (3) top exit pipeline is connected with blower fan (5) entrance, blower fan (5) outlet is at least divided into two-way, one tunnel is connected with absorption tower A air inlet, another road is connected with absorption tower B air inlet, absorption tower A is all connected with lye tank (vat) (14) with the top exit pipeline of absorption tower B, lye tank (vat) (14) top is provided with blow-down pipe, absorption tower A and B top, absorption tower are equipped with moisturizing pipeline, liquid discharge tube line is equipped with bottom absorption tower A and absorption tower B, described every bar liquid discharge tube line is all connected with hydrochloric acid tank (3).
2. hydrochloric acid tank hydrogen chloride tail gas treating apparatus according to claim 1, it is characterized in that described lye tank (vat) (14) top is provided with blow-down pipe, blow-down pipe is provided with sampling line.
3. hydrochloric acid tank hydrogen chloride tail gas treating apparatus according to claim 1, it is characterized in that described blower fan (5) outlet line is equipped with branch line with on the pipeline be connected bottom absorption tower A or absorption tower B, described branch line is connected with the top exit pipeline of absorption tower A or absorption tower B.
4. hydrochloric acid tank hydrogen chloride tail gas treating apparatus according to claim 1, it is characterized in that being equipped with liquid discharge tube line bottom described absorption tower A and absorption tower B, every bar liquid discharge tube line is provided with discharging pump.
5. hydrochloric acid tank hydrogen chloride tail gas treating apparatus according to claim 1, it is characterized in that the pipeline that described hydrochloric acid tank (3) top exit pipeline is connected with blower fan (5) entrance is provided with micro-pressure sensor (7), absorption tower A and absorption tower B bottom liquid discharge pipe are equipped with concentration of hydrochloric acid meter.
6. hydrochloric acid tank hydrogen chloride tail gas treating apparatus according to claim 1, is characterized in that described absorption tower A and absorption tower B is equipped with liquid level gauge.
7. hydrochloric acid tank hydrogen chloride tail gas treating apparatus according to claim 1, is characterized in that described absorption tower comprises gas distributor, packing material absorbing district, spray district and mist eliminator from bottom to top successively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520126325.4U CN204522718U (en) | 2015-03-04 | 2015-03-04 | Hydrochloric acid tank hydrogen chloride tail gas treating apparatus |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520126325.4U CN204522718U (en) | 2015-03-04 | 2015-03-04 | Hydrochloric acid tank hydrogen chloride tail gas treating apparatus |
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| CN204522718U true CN204522718U (en) | 2015-08-05 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107744717A (en) * | 2017-10-30 | 2018-03-02 | 河南神马尼龙化工有限责任公司 | A kind of emergent treatment system of adipic acid production tail gas |
| CN108398968A (en) * | 2018-04-25 | 2018-08-14 | 金川集团股份有限公司 | A kind of fiberglass hydrochloric acid tank automatic protecting control device |
| CN110947281A (en) * | 2018-09-27 | 2020-04-03 | 中国石油化工股份有限公司 | Device and method for treating chlorine-containing tail gas, mixture containing hydrochloric acid and application of mixture |
-
2015
- 2015-03-04 CN CN201520126325.4U patent/CN204522718U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107744717A (en) * | 2017-10-30 | 2018-03-02 | 河南神马尼龙化工有限责任公司 | A kind of emergent treatment system of adipic acid production tail gas |
| CN108398968A (en) * | 2018-04-25 | 2018-08-14 | 金川集团股份有限公司 | A kind of fiberglass hydrochloric acid tank automatic protecting control device |
| CN108398968B (en) * | 2018-04-25 | 2024-04-12 | 金川集团股份有限公司 | Automatic protection control device for glass fiber reinforced plastic hydrochloric acid storage tank |
| CN110947281A (en) * | 2018-09-27 | 2020-04-03 | 中国石油化工股份有限公司 | Device and method for treating chlorine-containing tail gas, mixture containing hydrochloric acid and application of mixture |
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