CN205269314U - Hydrochloric acid regenerating unit vent gas treatment system in - Google Patents
Hydrochloric acid regenerating unit vent gas treatment system in Download PDFInfo
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- CN205269314U CN205269314U CN201520954487.7U CN201520954487U CN205269314U CN 205269314 U CN205269314 U CN 205269314U CN 201520954487 U CN201520954487 U CN 201520954487U CN 205269314 U CN205269314 U CN 205269314U
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Abstract
The utility model relates to a hydrochloric acid regenerating unit vent gas treatment system in, include absorption tower, first order scrubbing tower, waste gas fan, first order vapour and liquid separator, second level scrubbing tower, second level vapour and liquid separator and the chimney of following tail gas circulation direction and setting gradually. The utility model discloses at least, following beneficial effect has: tail gas effectively reduces discharge fume in the gas content of dust and HCl pollutant of chimney outward after absorption tower and two -stage scrubbing tower are handled for fume emission meet the standard reduces the pollution to the environment, improves the environmental protection degree. The reentrant waste gas fan in back is handled through first order scrubbing tower to tail gas, alleviates HCl to fan wheel's corruption, prolongs the life of impeller. Through the circulation liquid cooling to each tower, reduce the flue -gas temperature, reduced the effluent concentration of acid mist simultaneously, avoided chimney discharge " white cigarette ".
Description
Technical field
The utility model belongs to regeneration of hydrochloric acid processing technology field, is specifically related to a kind of regeneration of hydrochloric acid device exhaust treatment system.
Background technology
Hydrochloric acid is a kind of important industrial production articles for use, and acid leaching system, etching industry etc. in steel industry cold mill complex, chemical industry industry all can be used. What the treatment process of hydrochloride waste adopted mostly is can the spray roasting of recovery and reusing and recycling, small part technique adopts fluidized bed process.
Baking flue gas after stoving oven (or other roasting apparatuss) thermal treatment is after preconcentrator (or he equipment) cooling, and in flue gas, temperature still has 90 ~ 95 DEG C, and HCl containing comparatively high temps and more dust; Conventional treatment process flow process is that baking flue gas is combined into row relax via absorption tower+exhaust gas fan+dechlorination tower+washing tower, but the situation that dust and HCl pollutant emission exceed standard often occurs in this technique, and acid mist behind absorption tower is comparatively serious to the impeller corrosion of exhaust gas fan. In addition, along with people are to the enhancing of environmental consciousness, " the white vapour " emerged in chimney can produce sense organ or psychological unhappy to people.
Practical novel content
The utility model embodiment relates to a kind of regeneration of hydrochloric acid device exhaust treatment system, at least can solve the part defect of prior art.
The utility model embodiment relates to a kind of regeneration of hydrochloric acid device exhaust treatment system, comprises along the absorption tower that tail gas circulating direction is arranged successively, first step washing tower, exhaust gas fan, first step gas-liquid separator, second stage washing tower, second stage gas-liquid separator and chimney.
As one of embodiment, described first step washing tower is venturi scrubber.
As one of embodiment, described first step gas-liquid separator is horizontal droplet separator.
As one of embodiment, described second stage washing tower air flow line is direction from bottom to top, and described second stage gas-liquid separator is vertical droplet separator and is arranged in washing tower top, the described second stage.
As one of embodiment, described second stage washing tower is packing tower.
As one of embodiment, described second stage gas-liquid separator exit end is provided with mesh mist eliminator.
As one of embodiment, the circulation fluid pipeline of described absorption tower, described first step washing tower and second stage washing tower being equipped with interchanger, each described interchanger is all connected with cooling water circulation pipeline.
As one of embodiment, each described interchanger is the interchanger that graphite heat exchanger is made up of the metallic substance of hydrochloric acid corrosion resistant.
As one of embodiment, the circulation fluid pipeline of described second stage washing tower is provided with the first recycle pump, and the circulation fluid pipeline of described first step washing tower is provided with the 2nd recycle pump; Being connected with the first backflow branch road on the outlet side pipeline of described first recycle pump, described first backflow branch road is connected to the collecting tank of described first step washing tower; Being connected with the 2nd backflow branch road on the outlet side pipeline of described 2nd recycle pump, described 2nd backflow branch road is connected to holding tank, and described holding tank is connected by the spraying mechanism of return line with described absorption tower.
As one of embodiment, described first backflow branch road and described 2nd backflow branch road are equipped with flow control valve.
The utility model embodiment at least achieves following useful effect: tail gas is after absorption tower and two-stage washing tower process, effectively reduce the content of dust and HCl pollutent in chimney discharged gas fume, make emission of smoke tallies standard, reduce the pollution to environment, it is to increase environmental protection degree. Tail gas enters exhaust gas fan again after first step washing tower processes, and alleviates HCl to the corrosion of draught fan impeller, extends the work-ing life of impeller.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, it is briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the regeneration of hydrochloric acid device exhaust treatment system that Fig. 1 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described embodiment is only the utility model part embodiment, instead of whole embodiments. Based on the embodiment in the utility model, other embodiments all that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belong to the scope of the utility model protection.
Such as Fig. 1, the utility model embodiment relates to a kind of regeneration of hydrochloric acid device exhaust treatment system, comprises along the absorption tower 1 that tail gas circulating direction is arranged successively, first step washing tower 2, exhaust gas fan 3, first step gas-liquid separator 4, second stage washing tower 5, second stage gas-liquid separator 6 and chimney 8. After above-mentioned technical process processes, dust and HCl Pollutant levels in chimney 8 discharged gas fume meet emission standard, reduce the pollution to environment, it is to increase the environmental protection degree of vent gas treatment.
In said system, first step washing tower 2 removes the dust granules in flue gas and acid mist for part, when flue gas enters exhaust gas fan 3 subsequently, can effectively alleviate HCl to the corrosion of draught fan impeller, extend the work-ing life of impeller. Preferably, described first step washing tower 2 is venturi scrubber 2, and when flue gas passes through at a high speed the aditus laryngis of venturi scrubber 2, dust and the removal effect of acid mist in flue gas are better. Described first step gas-liquid separator 4 is preferably horizontal droplet separator 4, for separating of the drop carried secretly in flue gas. Second stage washing tower 5 is preferably direction from bottom to top for the dust granules removed further in flue gas and acid mist, the air flow line of this second stage washing tower 5, can adopt packing tower or spray column; Described second stage gas-liquid separator 6 adopts vertical droplet separator 6, is arranged in washing tower 5 top, the described second stage, saves arrangement space.
Optimizing the structure of said system further, such as Fig. 1, described second stage gas-liquid separator 6 exit end is provided with mesh mist eliminator 7. Second stage gas-liquid separator 6 being adopted to the structure of vertical droplet separator, this mesh mist eliminator 7 is connected to the top of this vertical droplet separator 6, and chimney 8 can be connected to the top of this mist eliminator further, saves arrangement space. Mesh mist eliminator 7 can retain the less dust granules thing of particle diameter in flue gas, reduces the dust concentration of flue gas, effectively improves the cleanliness factor of discharged gas fume.
The structure of the said system that continues, such as Fig. 1, the circulation fluid pipeline of described absorption tower 1, described first step washing tower 2 and second stage washing tower 5 is equipped with interchanger 13, and each described interchanger 13 is all connected with cooling water circulation pipeline. Interchanger 13, for carrying out heat exchange with each circulation fluid, reduces the temperature of each circulation fluid; When circulation fluid spray after cooling is drenched to absorption tower 1, first step washing tower 2 or second stage washing tower 5, flue-gas temperature (temperature of chimney 8 discharged gas fume can be down to 40 ~ 50 DEG C) can be reduced, after cooling, the water vapour content in flue gas also can reduce, thus reduce in flue gas the HCl content taken out of by water vapour, the Pollutant emission concentration in chimney 8 discharged gas fume can be reduced further; After flue-gas temperature reduces simultaneously, eliminate " the white cigarette " in chimney 8, avoid " white cigarette " to the unhappy sense caused psychologically of the public. The interchanger that each described interchanger 13 all adopts graphite heat exchanger or is made up of the metallic substance of hydrochloric acid corrosion resistant, the metallic substance of above-mentioned hydrochloric acid corrosion resistant can be the metal such as titanium, niobium.
The structure of the said system that continues, such as Fig. 1, the circulation fluid pipeline of described second stage washing tower 5 is provided with the first recycle pump 11, and the circulation fluid pipeline of described first step washing tower 2 is provided with the 2nd recycle pump 10; Being connected with the first backflow branch road on the outlet side pipeline of described first recycle pump 11, described first backflow branch road is connected to the collecting tank of described first step washing tower 2; Being connected with the 2nd backflow branch road on the outlet side pipeline of described 2nd recycle pump 10, described 2nd backflow branch road is connected to holding tank 12, and described holding tank 12 is connected by the spraying mechanism of return line with described absorption tower 1, and return line is provided with charging pump 9. That is: the circulation fluid of second stage washing tower 5 can be partly refluxed in the circulation fluid collecting tank of first step washing tower 2, sprays for first step washing tower 2 and drenches; The circulation fluid of first step washing tower 2 can be partly refluxed in holding tank 12, sprays for absorption tower 1 and drenches. By regenerating acid recyclable in collecting tank bottom absorption tower 1. Further, described first backflow branch road and described 2nd backflow branch road are equipped with flow control valve, the quantity of reflux of first step washing tower 2 it is back to by the circulation fluid of Flow-rate adjustment valve regulation second stage washing tower 5, and the circulation fluid of first step washing tower 2 is back to the quantity of reflux of holding tank 12, thus regulate the HCl in the circulation fluid of first step washing tower 2 and second stage washing tower 5 and impurity concentration, ensure that HCl and impurity concentration can not be too high, both improve the utilization ratio of recirculated water, reach again the object that high-level efficiency reclaims HCl.
The working process of native system is as follows:
Supplementing de-salted water bottom second stage washing tower 5 in collecting tank, de-salted water opens the first recycle pump 11 after reaching setting liquid level, and circulation fluid circulates. Part circulation fluid is led in the separator of venturi scrubber 2 by the first backflow branch road, after liquid level reaches set(ting)value, opens the 2nd recycle pump 10. Part circulation fluid passes to holding tank 12 by the 2nd backflow branch road, after holding tank 12 liquid level reaches set(ting)value, opens charging pump 9.
High-temperature flue gas first enters from the bottom on absorption tower 1, and circulation fluid flows down from top to bottom from top, absorption tower 1, the effect of filler in tower body, after circulation fluid fully contacts in counter-current process with flue gas, completes the absorption to HCl in flue gas.
Flue gas after absorption tower 1 processes enters venturi scrubber 2, and with circulation fluid one superhigh speed by venturi scrubber 2 aditus laryngis, circulation fluid can the dust in the HCl of residual and remove portion flue gas in absorption portion flue gas in the process.
Flue gas after venturi scrubber 2 processes, after exhaust gas fan 3, after the gas-liquid separation of horizontal droplet separator 4, enters bottom second stage washing tower 5.
Flue gas after washing tower processes, the more vertical droplet separator 6 through tower body top carries out gas-liquid separation; After mesh mist eliminator 7 tackles fine particle, drain into air through chimney 8.
The foregoing is only better embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. regeneration of hydrochloric acid device exhaust treatment system, it is characterised in that: comprise along the absorption tower that tail gas circulating direction is arranged successively, first step washing tower, exhaust gas fan, first step gas-liquid separator, second stage washing tower, second stage gas-liquid separator and chimney.
2. regeneration of hydrochloric acid device exhaust treatment system according to claim 1, it is characterised in that: described first step washing tower is venturi scrubber.
3. regeneration of hydrochloric acid device exhaust treatment system according to claim 1, it is characterised in that: described first step gas-liquid separator is horizontal droplet separator.
4. regeneration of hydrochloric acid device exhaust treatment system according to claim 1, it is characterized in that: described second stage washing tower air flow line is direction from bottom to top, and described second stage gas-liquid separator is vertical droplet separator and is arranged in washing tower top, the described second stage.
5. regeneration of hydrochloric acid device exhaust treatment system according to claim 4, it is characterised in that: described second stage washing tower is packing tower.
6. regeneration of hydrochloric acid device exhaust treatment system according to any one of claim 1 to 5, it is characterised in that: described second stage gas-liquid separator exit end is provided with mesh mist eliminator.
7. regeneration of hydrochloric acid device exhaust treatment system according to any one of claim 1 to 5, it is characterized in that: being equipped with interchanger on the circulation fluid pipeline of described absorption tower, described first step washing tower and second stage washing tower, each described interchanger is all connected with cooling water circulation pipeline.
8. regeneration of hydrochloric acid device exhaust treatment system according to claim 7, it is characterised in that: the interchanger that each described interchanger is graphite heat exchanger or is made up of the metallic substance of hydrochloric acid corrosion resistant.
9. regeneration of hydrochloric acid device exhaust treatment system according to any one of claim 1 to 5, it is characterized in that: the circulation fluid pipeline of described second stage washing tower is provided with the first recycle pump, the circulation fluid pipeline of described first step washing tower is provided with the 2nd recycle pump; Being connected with the first backflow branch road on the outlet side pipeline of described first recycle pump, described first backflow branch road is connected to the collecting tank of described first step washing tower; Being connected with the 2nd backflow branch road on the outlet side pipeline of described 2nd recycle pump, described 2nd backflow branch road is connected to holding tank, and described holding tank is connected by the spraying mechanism of return line with described absorption tower.
10. regeneration of hydrochloric acid device exhaust treatment system according to claim 9, it is characterised in that: described first backflow branch road and described 2nd backflow branch road are equipped with flow control valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520954487.7U CN205269314U (en) | 2015-11-26 | 2015-11-26 | Hydrochloric acid regenerating unit vent gas treatment system in |
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| CN201520954487.7U CN205269314U (en) | 2015-11-26 | 2015-11-26 | Hydrochloric acid regenerating unit vent gas treatment system in |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108654312A (en) * | 2018-03-27 | 2018-10-16 | 中冶南方工程技术有限公司 | A kind of hydrochloric acid regenerating device and technique of flue gas cooling |
| CN109718640A (en) * | 2018-12-26 | 2019-05-07 | 新冶高科技集团有限公司 | A kind of regeneration of hydrochloric acid flue gas emission and discharge method |
| CN110975571A (en) * | 2019-12-06 | 2020-04-10 | 莘县华祥盐化有限公司 | System and method for centralized treatment of chloroacetic acid tail gas |
| CN112620232A (en) * | 2020-12-10 | 2021-04-09 | 华菱安赛乐米塔尔汽车板有限公司 | Process method for reducing scaling of acid regeneration ferrous chloride washing tower filler |
-
2015
- 2015-11-26 CN CN201520954487.7U patent/CN205269314U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108654312A (en) * | 2018-03-27 | 2018-10-16 | 中冶南方工程技术有限公司 | A kind of hydrochloric acid regenerating device and technique of flue gas cooling |
| CN109718640A (en) * | 2018-12-26 | 2019-05-07 | 新冶高科技集团有限公司 | A kind of regeneration of hydrochloric acid flue gas emission and discharge method |
| CN110975571A (en) * | 2019-12-06 | 2020-04-10 | 莘县华祥盐化有限公司 | System and method for centralized treatment of chloroacetic acid tail gas |
| CN112620232A (en) * | 2020-12-10 | 2021-04-09 | 华菱安赛乐米塔尔汽车板有限公司 | Process method for reducing scaling of acid regeneration ferrous chloride washing tower filler |
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