CN212142051U - Hydrochloric acid recovery device - Google Patents
Hydrochloric acid recovery device Download PDFInfo
- Publication number
- CN212142051U CN212142051U CN202020390954.9U CN202020390954U CN212142051U CN 212142051 U CN212142051 U CN 212142051U CN 202020390954 U CN202020390954 U CN 202020390954U CN 212142051 U CN212142051 U CN 212142051U
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- falling film
- film absorber
- water pipe
- hydrochloric acid
- storage tank
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Abstract
The utility model discloses a hydrochloric acid recovery unit, including one-level falling liquid film absorber, second grade falling liquid film absorber, tertiary falling liquid film absorber and intelligent instrument, the fixed intercommunication of bottom of one-level falling liquid film absorber has one-level falling liquid film absorber storage tank through the water pipe, the fixed intercommunication of bottom of second grade falling liquid film absorber has second grade falling liquid film absorber storage tank through the water pipe, the fixed intercommunication of bottom of tertiary falling liquid film absorber has tertiary falling liquid film absorber storage tank through the water pipe, the fixed intercommunication of bottom and the top of second grade falling liquid film absorber of one-level falling liquid film absorber, the fixed intercommunication of top through the water pipe of bottom and tertiary falling liquid film absorber of second grade falling liquid film absorber. The hydrochloric acid recovery device has simple structure and small equipment volume; hydrochloric acid is automatically transferred out, tap water is automatically supplemented, and resin adsorption is arranged, so that the absorbed hydrochloric acid has good quality, and downstream customers can normally use the hydrochloric acid; the waste of tail gas is reduced, the high-concentration hydrochloric acid is effectively recovered, and the environmental protection performance is improved.
Description
Technical Field
The utility model relates to a hydrochloric acid recovery unit especially relates to exhaust treatment device technical field.
Background
Currently, industrial processes produce a large amount of off-gas or waste gas, some of which contains hydrogen chloride (HCl) gas. Hydrogen chloride gas is an acidic gas, and is generally absorbed by a water phase after treating tail gas containing HCl gas, so that the hydrogen chloride gas is dissolved in water and then converted into a hydrochloric acid solution. The falling film absorber is important chemical equipment, is mainly used for absorbing HCl gas to prepare hydrochloric acid, and has the characteristics of small resistance, high absorption efficiency, large process elasticity and the like. However, the above process causes HCl gas waste, poor continuous operation, large equipment floor space, requires central control to track the content of hydrochloric acid, and the absorbed hydrochloric acid has poor quality (yellow color and peculiar smell), has high organic matter content, and generally treats the waste liquid as waste liquid to perform sewage treatment, thereby not only failing to effectively utilize the hydrochloric acid solution, but also increasing the sewage treatment pressure.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome prior art's defect, provide a hydrochloric acid recovery unit.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model relates to a hydrochloric acid recovery unit, including one-level falling film absorber, second grade falling film absorber, tertiary falling film absorber and intelligent instrument, the bottom of one-level falling film absorber is through the fixed intercommunication of water pipe has one-level falling film absorber storage tank, the bottom of second grade falling film absorber is through the fixed intercommunication of water pipe has second grade falling film absorber storage tank, the bottom of tertiary falling film absorber is through the fixed intercommunication of water pipe has tertiary falling film absorber storage tank, the bottom of one-level falling film absorber and the top of second grade falling film absorber are through the fixed intercommunication of water pipe, the bottom of second grade falling film absorber and the top of tertiary falling film absorber are through the fixed intercommunication of water pipe, the bottom of tertiary falling film absorber is through the fixed intercommunication of water pipe and is had alkali spray absorption tower;
the bottom of the third-stage falling film absorber storage tank is fixedly communicated with the top of the second-stage falling film absorber storage tank through a water pipe, and the bottom of the second-stage falling film absorber storage tank is fixedly communicated with the top of the first-stage falling film absorber storage tank through a water pipe;
the surface of intelligent instrument electric connection respectively has qualified hydrochloric acid to change the material pump and takes the teletransmission level gauge, take the teletransmission level gauge to be located the surface of one-level falling liquid film absorber storage tank, the surface of qualified hydrochloric acid commentaries on classics material pump and the fixed intercommunication of surface lead to pipe of one-level falling liquid film absorber storage tank, the other end lead to pipe fixed intercommunication of qualified hydrochloric acid commentaries on classics material pump has the check valve, the one end lead to pipe fixed intercommunication of check valve has 5 jars in the hydrochloric acid, the bottom lead to pipe fixed intercommunication of hydrochloric acid intermediate tank has the resin adsorption tower, the fixed surface intercommunication that the storage tank was removed to the bottom lead to pipe and qualified hydrochloric acid of resin adsorption tower.
Preferably, the top of the three-stage falling film absorber storage tank is fixedly connected with a tap water switch valve through a water pipe, one end of the tap water switch valve is fixedly communicated with a tap water tower through a water pipe, and the tap water switch valve is electrically connected with an intelligent instrument.
Preferably, the bottom surface of the alkali spraying absorption tower is fixedly communicated with the air exhaust end of the de-vacuum pump, and the bottom surface of the alkali spraying absorption tower is fixedly communicated with the liquid inlet end of the liquid alkali tank.
Preferably, the other side of the bottom of the alkali spraying absorption tower is fixedly communicated with an alkali spraying absorption circulating pump through a water pipe, one end of the alkali spraying absorption circulating pump is fixedly communicated with the top end of the alkali spraying absorption tower through a water pipe, and one end of the alkali spraying absorption circulating pump is fixedly communicated with the surface of the absorption liquid storage tank through a water pipe.
Preferably, the bottom of the three-stage falling film absorber storage tank is fixedly communicated with a three-stage falling film absorption circulating pump through a water pipe, and one end of the three-stage falling film absorption circulating pump is fixedly communicated with the top end of the three-stage falling film absorber through a water pipe.
Preferably, the bottom of the storage tank of the secondary falling film absorber is fixedly communicated with a secondary falling film absorption circulating pump through a water pipe, and one end of the secondary falling film absorption circulating pump is fixedly communicated with the top end of the secondary falling film absorber through a water pipe.
Preferably, the bottom of the first-stage falling film absorber storage tank is fixedly communicated with a first-stage falling film absorption circulating pump through a water pipe, and one end of the first-stage falling film absorption circulating pump is fixedly communicated with the top end of the first-stage falling film absorber through a water pipe.
The utility model discloses the beneficial effect who reaches is:
1. the hydrochloric acid recovery device has simple structure and small equipment volume; hydrochloric acid is automatically transferred out, tap water is automatically supplemented, and resin adsorption is arranged, so that the absorbed hydrochloric acid has good quality, and downstream customers can normally use the hydrochloric acid; the waste of tail gas is reduced, the high-concentration hydrochloric acid is effectively recovered, and the environmental protection performance is improved.
2. According to the hydrochloric acid recovery device, the volume of the storage tank of the falling film absorber of the device is changed from a plurality of conventional cubic horizontal tanks to a 0.5 cubic vertical tank, so that the space occupied by equipment is reduced; the falling film absorber storage tanks of the device are connected only through pipelines and have no valves and the like, so that equipment is saved, and potential safety hazards are reduced; materials in a storage tank of the falling film absorber of the device are all circularly operated in a closed space, so that leakage points are reduced; the storage tank of the falling film absorber of the device realizes automatic fresh tap water supply; the falling film absorber storage tank of the device can determine whether the concentration of hydrochloric acid is saturated or not according to the increase of the liquid level; the falling film absorber storage tank of the device realizes automatic transfer of qualified hydrochloric acid to a finished product storage tank; a check valve is additionally arranged after a storage tank of the falling film absorber of the device is rotated out of a hydrochloric acid pump, so that qualified hydrochloric acid is prevented from flowing backwards; the storage tank of the falling film absorber of the device can automatically discharge hydrochloric acid frequently and supplement fresh tap water automatically, and the operation is stable; the falling film absorber storage tank of the device can reduce the frequency of manual detection of the concentration of hydrochloric acid and reduce the labor cost; the device uses resin for adsorption, so that the absorbed hydrochloric acid has good quality and can be normally sold.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a diagram of the hydrogen chloride bulk absorption system of the present invention;
fig. 2 is a structural diagram of a falling film absorber storage tank of the present invention.
As shown in the figure: 1. a first-order falling film absorber; 2. a first-stage falling film absorber storage tank; 3. a secondary falling film absorber; 4. a second-stage falling film absorber storage tank; 5. a three-stage falling film absorber; 6. a three-stage falling film absorber storage tank; 7. a tap water switch valve; 8. a qualified hydrochloric acid transfer pump; 9. an intelligent instrument; 10. an alkali spray absorption tower; 11. a first-stage falling film absorption circulating pump; 12. a two-stage falling film absorption circulating pump; 13. a three-stage falling film absorption circulating pump; 14. an alkali spray absorption circulating pump; 15. a check valve; 16. a remote transmission liquid level meter; 17. a resin adsorption tower; 18. a hydrochloric acid intermediate tank.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1-2, a hydrochloric acid recovery device comprises a primary falling film absorber 1, a secondary falling film absorber 3, a tertiary falling film absorber 5 and an intelligent instrument 9, wherein the bottom of the primary falling film absorber 1 is fixedly communicated with a primary falling film absorber storage tank 2 through a water pipe, the bottom of the secondary falling film absorber 3 is fixedly communicated with a secondary falling film absorber storage tank 4 through a water pipe, the bottom of the tertiary falling film absorber 5 is fixedly communicated with a tertiary falling film absorber storage tank 6 through a water pipe, the bottom of the primary falling film absorber 1 is fixedly communicated with the top of the secondary falling film absorber 3 through a water pipe, the bottom of the secondary falling film absorber 3 is fixedly communicated with the top of the tertiary falling film absorber 5 through a water pipe, and the bottom of the tertiary falling film absorber 5 is fixedly communicated with an alkali spray absorption tower 10 through a water pipe; the height of each stage of falling film absorber storage tank is 1200mm, and the inner diameter is 750 mm;
the top of the three-level falling film absorber storage tank 6 is fixedly connected with a tap water switch valve 7 through a water pipe to realize automatic fresh tap water supply, one end of the tap water switch valve 7 is fixedly communicated with a tap water tower through a water pipe, and the tap water switch valve 7 is electrically connected with an intelligent instrument 9; the bottom surface of the alkali spray absorption tower 10 is fixedly communicated with the air exhaust end of the vacuum removal pump, and the bottom surface of the alkali spray absorption tower 10 is fixedly communicated with the liquid inlet end of the liquid alkali tank;
the bottom of the third-stage falling film absorber storage tank 6 is fixedly communicated with the top of the second-stage falling film absorber storage tank 4 through a water pipe, and the bottom of the second-stage falling film absorber storage tank 4 is fixedly communicated with the top of the first-stage falling film absorber storage tank 2 through a water pipe;
an alkali spraying absorption circulating pump 14 is fixedly communicated with the other side of the bottom of the alkali spraying absorption tower 10 through a water pipe, one end of the alkali spraying absorption circulating pump 14 is fixedly communicated with the top end of the alkali spraying absorption tower 10 through a water pipe, and one end of the alkali spraying absorption circulating pump 14 is fixedly communicated with the surface of an absorption liquid storage tank through a water pipe;
the bottom of the three-stage falling film absorber storage tank 6 is fixedly communicated with a three-stage falling film absorption circulating pump 13 through a water pipe, and one end of the three-stage falling film absorption circulating pump 13 is fixedly communicated with the top end of the three-stage falling film absorber 5 through a water pipe; the bottom of the storage tank 4 of the secondary falling film absorber is fixedly communicated with a secondary falling film absorption circulating pump 12 through a water pipe, and one end of the secondary falling film absorption circulating pump 12 is fixedly communicated with the top end of the secondary falling film absorber 3 through a water pipe; the bottom of the first-stage falling film absorber storage tank 2 is fixedly communicated with a first-stage falling film absorption circulating pump 11 through a water pipe, and one end of the first-stage falling film absorption circulating pump 11 is fixedly communicated with the top end of the first-stage falling film absorber 1 through a water pipe; under the condition of uninterruptedly and continuously absorbing hydrogen chloride, saturated hydrochloric acid can be automatically transferred out for multiple times in a short time, fresh tap water can be automatically supplemented, and the whole process automatically and stably runs in a closed space;
the surface of the intelligent instrument 9 is respectively and electrically connected with a qualified hydrochloric acid transferring pump 8 and a belt remote transmission liquid level meter 16, so that the automatic transfer of saturated hydrochloric acid is realized, the belt remote transmission liquid level meter 16 is positioned on the surface of the first-level falling film absorber storage tank 2, the surface of the qualified hydrochloric acid transferring pump 8 is fixedly communicated with the surface of the first-level falling film absorber storage tank 2 through a water pipe, the other end of the qualified hydrochloric acid transferring pump 8 is fixedly communicated with a check valve 15 through a water pipe, the backflow of the qualified hydrochloric acid is prevented, the negative pressure is influenced, one end of the check valve 15 is fixedly communicated with a hydrochloric acid intermediate tank 18 through a water pipe, the bottom of the hydrochloric acid intermediate tank 18 is fixedly communicated with a resin adsorption tower 17 through a water pipe, the height; the bottom of the resin adsorption tower 17 is fixedly communicated with the surface of the qualified hydrochloric acid storage tank through a water pipe; the device changes the feeding and discharging positions of an absorption liquid storage tank below the falling film absorber, reduces the volume of equipment and realizes continuous pump-free material transfer. According to the linear relation between the increase of the hydrochloric acid concentration and the liquid level rise of the storage tank of the falling film absorber, a liquid level meter with a remote transmission function is arranged on the liquid level of the storage tank below the falling film absorber, an intelligent instrument is linked with a roll-out hydrochloric acid pump and a tap water replenishing valve, the hydrochloric acid concentration is determined by the height change of the storage tank of the first-level falling film absorber, the automatic operation is realized, and the frequency of manual detection of the hydrochloric acid concentration is reduced. The concentration of the hydrochloric acid reaches 35 percent, the production requirement is met, the operation is simplified, and the automatic and continuous operation is realized. The resin adsorption tank is arranged, so that the quality of the absorbed hydrochloric acid is good;
the hydrochloric acid recovery device has simple structure and small equipment volume; hydrochloric acid is automatically transferred out, tap water is automatically supplemented, and resin adsorption is arranged, so that the absorbed hydrochloric acid has good quality, and downstream customers can normally use the hydrochloric acid; the waste of tail gas is reduced, high-concentration hydrochloric acid is effectively recovered, and the environmental protection is improved; according to the hydrochloric acid recovery device, the volume of the storage tank of the falling film absorber of the device is changed from a plurality of conventional cubic horizontal tanks to a 0.5 cubic vertical tank, so that the space occupied by equipment is reduced; the falling film absorber storage tanks of the device are connected only through pipelines and have no valves and the like, so that equipment is saved, and potential safety hazards are reduced; materials in a storage tank of the falling film absorber of the device are all circularly operated in a closed space, so that leakage points are reduced; the storage tank of the falling film absorber of the device realizes automatic fresh tap water supply; the falling film absorber storage tank of the device can determine whether the concentration of hydrochloric acid is saturated or not according to the increase of the liquid level; the falling film absorber storage tank of the device realizes automatic transfer of qualified hydrochloric acid to a finished product storage tank; a check valve is additionally arranged after a storage tank of the falling film absorber of the device is rotated out of a hydrochloric acid pump, so that qualified hydrochloric acid is prevented from flowing backwards; the storage tank of the falling film absorber of the device can automatically discharge hydrochloric acid frequently and supplement fresh tap water automatically, and the operation is stable; the falling film absorber storage tank of the device can reduce the frequency of manual detection of the concentration of hydrochloric acid and reduce the labor cost; the device uses resin for adsorption, so that the absorbed hydrochloric acid has good quality and can be normally sold.
The working principle is as follows: hydrogen chloride gas generated from a production line enters from the top of the primary falling film absorber 1 and exchanges and absorbs with primary circulating absorption liquid, and unabsorbed hydrogen chloride gas enters from the bottom of the primary falling film absorber 1 and enters the top of the secondary falling film absorber 3 to be absorbed.
Similarly, the hydrogen chloride gas unabsorbed by the secondary falling film absorber 3 comes out from the bottom of the secondary falling film absorber 3 and enters the top of the tertiary falling film absorber 5 for absorption.
Finally, the hydrogen chloride enters an alkali spraying absorption tower 10 for absorption, and the device ensures that the hydrogen chloride tail gas is completely absorbed.
After the tap water switch valve 7 is opened, tap water enters from the three-stage falling film absorber storage tank 6 and gradually overflows to the two-stage falling film absorber storage tank 4 and the one-stage falling film absorber storage tank 2, and the concentration of hydrochloric acid is gradually increased. When the concentration of hydrochloric acid in the first-stage falling film absorber storage tank 2 reaches more than 30%, the liquid level in the first-stage falling film absorber storage tank 2 also rises to a certain value.
The intelligent instrument 9 sends a signal to the qualified hydrochloric acid transferring pump 8 according to the set upper limit value of the liquid level, the qualified hydrochloric acid transferring pump 8 is automatically started to be transferred to the hydrochloric acid intermediate tank 18, and the device is provided with a check valve 15 to prevent the qualified hydrochloric acid from flowing backwards. Hydrochloric acid in the hydrochloric acid intermediate tank 18 enters the resin adsorption tower 17 for resin adsorption.
When the liquid level of the material transferring to the first-stage falling film absorber storage tank 2 reaches the lower limit value set by the remote transmission intelligent instrument 9, a signal is automatically sent to stop the qualified hydrochloric acid material transferring pump 8.
The remote transmission intelligent instrument 9 automatically sends out a signal according to the set lower limit value of the liquid level, so that the tap water switch valve 7 is opened, fresh tap water is automatically supplemented to the three-stage falling film absorber storage tank 6, and when the liquid level of the first-stage falling film absorber storage tank 2 reaches the upper limit value, the tap water switch valve 7 is closed, and water inlet is cut off. Completing a cycle of operation.
The device has small volume, and can realize the material transfer and the tap water supplement with large frequency.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The utility model provides a hydrochloric acid recovery unit, includes one-level falling film absorber (1), second grade falling film absorber (3), tertiary falling film absorber (5) and intelligent instrument (9), its characterized in that: the bottom of the first-stage falling film absorber (1) is fixedly communicated with a first-stage falling film absorber storage tank (2) through a water pipe, the bottom of the second-stage falling film absorber (3) is fixedly communicated with a second-stage falling film absorber storage tank (4) through a water pipe, the bottom of the third-stage falling film absorber (5) is fixedly communicated with a third-stage falling film absorber storage tank (6) through a water pipe, the bottom of the first-stage falling film absorber (1) is fixedly communicated with the top of the second-stage falling film absorber (3) through a water pipe, the bottom of the second-stage falling film absorber (3) is fixedly communicated with the top of the third-stage falling film absorber (5) through a water pipe, and the bottom of the third-stage falling film absorber (5) is fixedly communicated with an alkali spray;
the bottom of the three-stage falling film absorber storage tank (6) is fixedly communicated with the top of the two-stage falling film absorber storage tank (4) through a water pipe, and the bottom of the two-stage falling film absorber storage tank (4) is fixedly communicated with the top of the one-stage falling film absorber storage tank (2) through a water pipe;
the surface of smart meter (9) is electric connection respectively and is expected pump (8) and take teletransmission level gauge (16) to qualified hydrochloric acid commentaries on classics, take teletransmission level gauge (16) to be located the surface of one-level falling film absorber storage tank (2), the surface of qualified hydrochloric acid commentaries on classics material pump (8) and the surface of one-level falling film absorber storage tank (2) are through the fixed intercommunication of water pipe, the other end of qualified hydrochloric acid commentaries on classics material pump (8) is through the fixed intercommunication of water pipe and is had check valve (15), the one end of check valve (15) is through the fixed intercommunication of water pipe and is had hydrochloric acid intermediate tank (18), the bottom of hydrochloric acid intermediate tank (18) is through the fixed intercommunication of water pipe and is had resin adsorption tower (17), the bottom of resin adsorption tower (17) is through the fixed intercommunication of surface.
2. The hydrochloric acid recovery device according to claim 1, characterized in that: the top of tertiary falling film absorber storage tank (6) is through water pipe fixedly connected with running water ooff valve (7), the one end of running water ooff valve (7) is through water pipe and the fixed intercommunication of running water tower, running water ooff valve (7) and intelligent instrument (9) electric connection.
3. The hydrochloric acid recovery device according to claim 1, characterized in that: the bottom surface of the alkali spraying absorption tower (10) is fixedly communicated with the air exhaust end of the vacuum pump, and the bottom surface of the alkali spraying absorption tower (10) is fixedly communicated with the liquid inlet end of the liquid alkali tank.
4. A hydrochloric acid recovery device as claimed in claim 3, characterized in that: the other side of the bottom of the alkali spraying absorption tower (10) is fixedly communicated with an alkali spraying absorption circulating pump (14) through a water pipe, one end of the alkali spraying absorption circulating pump (14) is fixedly communicated with the top end of the alkali spraying absorption tower (10) through a water pipe, and one end of the alkali spraying absorption circulating pump (14) is fixedly communicated with the surface of an absorption liquid storage tank through a water pipe.
5. The hydrochloric acid recovery device according to claim 1, characterized in that: the bottom of the three-level falling film absorber storage tank (6) is fixedly communicated with a three-level falling film absorption circulating pump (13) through a water pipe, and one end of the three-level falling film absorption circulating pump (13) is fixedly communicated with the top end of the three-level falling film absorber (5) through a water pipe.
6. The hydrochloric acid recovery device according to claim 1, characterized in that: the bottom of the second-stage falling film absorber storage tank (4) is fixedly communicated with a second-stage falling film absorption circulating pump (12) through a water pipe, and one end of the second-stage falling film absorption circulating pump (12) is fixedly communicated with the top end of the second-stage falling film absorber (3) through a water pipe.
7. The hydrochloric acid recovery device according to claim 1, characterized in that: the bottom of the first-level falling film absorber storage tank (2) is fixedly communicated with a first-level falling film absorption circulating pump (11) through a water pipe, and one end of the first-level falling film absorption circulating pump (11) is fixedly communicated with the top end of the first-level falling film absorber (1) through a water pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020390954.9U CN212142051U (en) | 2020-03-25 | 2020-03-25 | Hydrochloric acid recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020390954.9U CN212142051U (en) | 2020-03-25 | 2020-03-25 | Hydrochloric acid recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212142051U true CN212142051U (en) | 2020-12-15 |
Family
ID=73715658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020390954.9U Expired - Fee Related CN212142051U (en) | 2020-03-25 | 2020-03-25 | Hydrochloric acid recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212142051U (en) |
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2020
- 2020-03-25 CN CN202020390954.9U patent/CN212142051U/en not_active Expired - Fee Related
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Granted publication date: 20201215 |