CN216935449U - A tail gas purification absorption structure for preparation of high yield dilute nitric acid - Google Patents
A tail gas purification absorption structure for preparation of high yield dilute nitric acid Download PDFInfo
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- CN216935449U CN216935449U CN202220457819.0U CN202220457819U CN216935449U CN 216935449 U CN216935449 U CN 216935449U CN 202220457819 U CN202220457819 U CN 202220457819U CN 216935449 U CN216935449 U CN 216935449U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model belongs to the field of tail gas treatment, in particular to a tail gas purification and absorption structure for preparing high-yield dilute nitric acid, which aims at solving the problems that the existing general absorption structure only leads a common tail gas pipe to the bottom of absorption liquid, and the tail gas is not fully contacted with the absorption liquid, so that the partial absorption liquid is not completely reacted, and the absorption efficiency is low, and provides the following scheme, which comprises an absorption tower, a tail gas pipe, an absorption liquid pipe, a liquid discharge pipe and a circulating pump, wherein the top of the absorption tower is provided with an exhaust port, one side of the water inlet and one side of the water outlet of the circulating pump are respectively and fixedly connected with a first water pipe and a second water pipe, can uniformly disperse the tail gas into multi-column airflow to react with the absorption liquid, improves the tail gas absorption efficiency, the absorption liquid can flow circularly, incomplete reaction of the local absorption liquid is avoided, the second water pipe can be reinforced, and the stability of the absorption structure is improved.
Description
Technical Field
The utility model relates to the technical field of tail gas treatment, in particular to a tail gas purification and absorption structure for high-yield preparation of dilute nitric acid.
Background
The tail gas is mostly automobile tail gas, and some chemical production can also produce tail gas, especially for preparing dilute nitric acid, nitrogen dioxide can be generated by self decomposition due to the instability of the dilute nitric acid, the nitrogen dioxide has toxicity to human bodies, and the nitrogen dioxide can generate corrosivity when contacting water, so that the nitrogen dioxide treatment is an important process for preparing the dilute nitric acid.
The existing nitrogen dioxide treatment method mostly uses sodium hydroxide solution as absorption liquid to absorb nitrogen dioxide, but a common absorption structure only leads a common tail gas pipe to the bottom of the absorption liquid, and tail gas is not fully contacted with the absorption liquid, so that partial absorption liquid does not completely react, and the absorption efficiency is low, thereby providing a tail gas purification absorption structure for high-yield dilute nitric acid preparation.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that in the prior art, a common tail gas pipe is only led into the bottom of absorption liquid, and the tail gas is not fully contacted with the absorption liquid, so that partial absorption liquid does not completely react, and the absorption efficiency is low.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a tail gas purification and absorption structure for high-yield preparation of dilute nitric acid comprises an absorption tower, a tail gas pipe, an absorption liquid pipe, a liquid discharge pipe and a circulating pump, wherein an exhaust port is formed in the top of the absorption tower, one side of a water inlet and one side of a water outlet of the circulating pump are respectively and fixedly connected with a first water pipe and a second water pipe, the first water pipe, the second water pipe, the tail gas pipe, the absorption liquid pipe and the liquid discharge pipe are communicated with the absorption tower, the circumferential outer walls of the tail gas pipe, the absorption liquid pipe, the first water pipe and the liquid discharge pipe are respectively provided with a first adjusting valve, a second adjusting valve, a third adjusting valve and a fourth adjusting valve, one end of the second water pipe penetrates through the absorption tower and is fixedly connected with a liquid flow dividing pipe, the bottom of the liquid flow dividing pipe is provided with a plurality of communicated short guide pipes, and one end of the tail gas pipe penetrates through the bottom of the absorption tower and is provided with a gas flow dividing assembly;
the gas distribution assembly comprises a drainage tube, the drainage tube is communicated with one end of the tail gas tube, the upper surface of the drainage tube is fixedly connected with a plurality of guide tubes, the top of each guide tube is fixedly connected with a distribution barrel, and a plurality of exhaust holes are formed in the outer wall of the circumference of the distribution barrel.
Preferably, the plurality of guide tubes are circularly and symmetrically distributed by taking the central point of the drainage tube as a circular point.
Preferably, a fixing plate is fixedly connected between one side of the circumference of the second water pipe and the circumferential outer wall of the absorption tower.
Preferably, a reinforcing plate is fixedly connected between one side of the circumference of the second water pipe and the inner wall of the top of the absorption tower.
Preferably, the circumference outer wall of tail gas pipe, absorption liquid pipe, first water pipe, second water pipe and fluid-discharge tube all is equipped with hydraulic seal spare, and hydraulic seal spare all contacts with the absorption tower.
Preferably, one side of the circumference of the absorption tower is provided with an observation window.
Compared with the prior art, the utility model has the beneficial effects that:
1. through the setting of gas reposition of redundant personnel subassembly, can disperse into many post air currents with the even guide of tail gas, in the different positions of absorption tower bottom enter into the tower respectively, increased the area of contact of tail gas and absorption liquid, improved the absorptive efficiency of tail gas.
2. Through the setting of circulating pump, first water pipe, second water pipe and liquid shunt tubes, can carry out circulation flow with the absorption liquid, make it fall from the interior top of absorption tower, increase and the area of contact of tail gas, avoid appearing the complete condition of local absorption liquid non-reaction simultaneously.
3. Through the setting of fixed plate and gusset plate, can fix the second water pipe, avoid appearing the second water pipe and rock for a long time and produce the condition that the structure is not hard up, improved the stability of second water pipe structure.
According to the utility model, the tail gas can be uniformly dispersed into the multi-column airflow to react with the absorption liquid, so that the tail gas absorption efficiency is improved, the absorption liquid can flow circularly, incomplete reaction of the local absorption liquid is avoided, the second water pipe can be reinforced, and the stability of the absorption structure is improved.
Drawings
FIG. 1 is a schematic diagram of a three-dimensional front view angle structure of a tail gas purification and absorption structure for high-yield dilute nitric acid preparation according to the present invention;
FIG. 2 is a schematic diagram of a three-dimensional rear view structure of a tail gas purification and absorption structure for high-yield dilute nitric acid preparation according to the present invention;
FIG. 3 is a schematic diagram of the internal structure of a tail gas purification and absorption structure for high-yield dilute nitric acid preparation according to the present invention;
fig. 4 is a schematic structural diagram of a gas distribution assembly of a tail gas purification and absorption structure for high-yield dilute nitric acid preparation according to the present invention.
In the figure: 1. an absorption tower; 101. an observation window; 2. a tail gas pipe; 3. a first regulating valve; 4. an absorption liquid pipe; 5. a second regulating valve; 6. a first water pipe; 7. a third regulating valve; 8. a circulation pump; 9. a second water pipe; 10. a fixing plate; 11. a liquid discharge pipe; 12. a fourth regulating valve; 13. a reinforcing plate; 14. a liquid shunt tube; 1401. a guide stub; 15. a hydraulic seal; 16. a gas diversion assembly; 1601. a drainage tube; 1602. a guide tube; 1603. a shunt cylinder; 1604. and (4) exhausting holes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
Referring to fig. 1-4, a tail gas purification and absorption structure for high-yield preparation of dilute nitric acid comprises an absorption tower 1, a tail gas pipe 2, an absorption liquid pipe 4, a liquid discharge pipe 11 and a circulating pump 8, wherein the top of the absorption tower 1 is provided with an exhaust port, one side of a water inlet and one side of a water outlet of the circulating pump 8 are respectively fixed with a first water pipe 6 and a second water pipe 9 through bolts, the first water pipe 6, the second water pipe 9, the tail gas pipe 2, the absorption liquid pipe 4 and the liquid discharge pipe 11 are communicated with the absorption tower 1, the circumferential outer walls of the tail gas pipe 2, the absorption liquid pipe 4, the first water pipe 6 and the liquid discharge pipe 11 are respectively provided with a first adjusting valve 3, a second adjusting valve 5, a third adjusting valve 7 and a fourth adjusting valve 12, one end of the second water pipe 9 passes through the absorption tower 1 and is fixed with a liquid shunt pipe 14 through bolts, the bottom of the liquid shunt pipe 14 is provided with a plurality of communicated guide short pipes 1401, one end of the tail gas pipe 2 passes through the bottom of the absorption tower 1 and is provided with a gas shunt assembly 16, gas flow distribution assembly 16 includes drainage tube 1601, and drainage tube 1601 is linked together with the one end of tail gas pipe 2, and the upper surface of drainage tube 1601 is fixed with a plurality of guide tubes 1602 through the bolt, and the top of guide tube 1602 all is fixed with a reposition of redundant personnel section of thick bamboo 1603 through the bolt, and a plurality of exhaust holes 1604 have all been seted up to the circumference outer wall of reposition of redundant personnel section of thick bamboo 1603.
Example two
Referring to fig. 1 to 4, the present invention provides a new technical solution: a tail gas purification and absorption structure for high-yield preparation of dilute nitric acid comprises an absorption tower 1, a tail gas pipe 2, an absorption liquid pipe 4, a liquid discharge pipe 11 and a circulating pump 8, wherein an exhaust port is formed in the top of the absorption tower 1 and can discharge tail gas which reaches the standard after purification, an observation window 101 is arranged on one side of the circumference of the absorption tower 1, people can conveniently know the absorption condition of the tail gas in the absorption tower 1 through the observation window 101, corresponding adjustment is carried out according to specific conditions, a first water pipe 6 and a second water pipe 9 are respectively fixed on one side of a water inlet and one side of a water outlet of the circulating pump 8 through bolts, a fixing plate 10 is fixed between one side of the circumference of the second water pipe 9 and the outer wall of the circumference of the absorption tower 1 through bolts, a reinforcing plate 13 is fixed between one side of the circumference of the second water pipe 9 and the inner wall of the top of the absorption tower 1 through bolts, the fixing plate 10 and the reinforcing plate 13 can fix the second water pipe 9, the condition that the second water pipe 9 shakes for a long time to cause structure looseness is avoided, the stability of the structure of the second water pipe 9 is improved, the first water pipe 6, the second water pipe 9, the tail gas pipe 2, the absorption liquid pipe 4 and the liquid discharge pipe 11 are communicated with the absorption tower 1, the circumferential outer walls of the tail gas pipe 2, the absorption liquid pipe 4, the first water pipe 6 and the liquid discharge pipe 11 are respectively provided with a first adjusting valve 3, a second adjusting valve 5, a third adjusting valve 7 and a fourth adjusting valve 12, the circumferential outer walls of the tail gas pipe 2, the absorption liquid pipe 4, the first water pipe 6, the second water pipe 9 and the liquid discharge pipe 11 are respectively provided with a hydraulic sealing part 15, the hydraulic sealing parts 15 are all contacted with the absorption tower 1, the hydraulic sealing parts 15 have good sealing effect and can improve the sealing performance of the absorption tower 1, one end of the second water pipe 9 penetrates through the absorption tower 1 and is fixed with a liquid shunt pipe 14 through bolts, the bottom of the liquid shunt pipe 14 is provided with a plurality of communicated short guide pipes 1401, the liquid diversion pipe 14 and the guide short pipe 1401 can divert the absorption liquid, the diverted absorption liquid can contact with the tail gas in the falling process, further absorb nitrogen dioxide in the tail gas, one end of the tail gas pipe 2 penetrates through the bottom of the absorption tower 1 and is provided with a gas diversion assembly 16, the gas diversion assembly 16 comprises a drainage pipe 1601, the drainage pipe 1601 is communicated with one end of the tail gas pipe 2, the upper surface of the drainage pipe 1601 is fixed with a plurality of guide pipes 1602 through bolts, the tops of the guide pipes 1602 are fixed with diversion barrels 1603 through bolts, the circumferential outer wall of the diversion barrels 1603 is provided with a plurality of exhaust holes 1604, the plurality of guide pipes 1602 are circularly and symmetrically distributed by taking the central point of the drainage pipe 1601 as a circular point, the guide pipes 1602 are circularly and symmetrically distributed to uniformly guide and disperse the tail gas into multi-column air flows which respectively enter the tower from different positions at the bottom of the absorption tower 1, so that the contact area of the tail gas and the absorption liquid is increased, the efficiency of tail gas absorption is improved.
The working principle is as follows: when tail gas is generated during the preparation of dilute nitric acid, the first regulating valve 3 is opened, the tail gas enters the gas splitting assembly 16 through the tail gas pipe 2, is uniformly dispersed into multi-column gas flow through the splitting cylinder 1603 and then enters the absorption tower 1, the tail gas enters the absorption tower 1 and is absorbed by absorption liquid, the rest tail gas floats out of the absorption liquid and flows upwards, meanwhile, the circulating pump 8 and the third regulating valve 7 are opened, the circulating pump 8 pumps the absorption liquid in the absorption tower 1, the absorption liquid flows into the second water pipe 9 from the first water pipe 6 and then flows into the liquid splitting pipe 14 from the second water pipe 9, the absorption liquid is dispersed into multi-column liquid through the guide short pipe 1401, the multi-column liquid falls down from the upper part in the absorption tower 1 and contacts with the tail gas again in the air to absorb nitrogen dioxide in the air, when the absorption liquid in the absorption tower 1 needs to be replaced, the first regulating valve 3 and the third regulating valve 7 are closed, then the fourth regulating valve 12 is opened, the mixed liquid after the reaction in the absorption tower 1 is extracted through the fourth regulating valve 12, and (3) closing the fourth regulating valve 12 after the extraction is finished, then opening the second regulating valve 5, conveying new absorption liquid into the absorption tower 1, and closing the second regulating valve 5 after the conveying is finished.
However, as is well known to those skilled in the art, the working principle and wiring method of the circulation pump 8 are common and are conventional means or common knowledge, and will not be described herein, and those skilled in the art can make any choice according to their needs or convenience.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (6)
1. A tail gas purification and absorption structure for high-yield preparation of dilute nitric acid comprises an absorption tower (1), a tail gas pipe (2), an absorption liquid pipe (4), a liquid discharge pipe (11) and a circulating pump (8), and is characterized in that an exhaust port is formed in the top of the absorption tower (1), one side of a water inlet and one side of a water outlet of the circulating pump (8) are respectively and fixedly connected with a first water pipe (6) and a second water pipe (9), the first water pipe (6), the second water pipe (9), the tail gas pipe (2), the absorption liquid pipe (4) and the liquid discharge pipe (11) are respectively communicated with the absorption tower (1), the circumferential outer walls of the tail gas pipe (2), the absorption liquid pipe (4), the first water pipe (6) and the liquid discharge pipe (11) are respectively provided with a first regulating valve (3), a second regulating valve (5), a third regulating valve (7) and a fourth regulating valve (12), one end of the second water pipe (9) penetrates through the absorption tower (1) and is fixedly connected with a liquid shunt pipe (14), the bottom of the liquid shunt pipe (14) is provided with a plurality of communicated guide short pipes (1401), and one end of the tail gas pipe (2) penetrates through the bottom of the absorption tower (1) and is provided with a gas shunt assembly (16);
gaseous reposition of redundant personnel subassembly (16) are linked together including drainage tube (1601), the one end of drainage tube (1601) and tail-gas tube (2), the last fixed surface of drainage tube (1601) is connected with a plurality of guide tubes (1602), and the equal fixedly connected with in top of guide tube (1602) shunts section of thick bamboo (1603), and a plurality of exhaust holes (1604) have all been seted up to the circumference outer wall of shunting section of thick bamboo (1603).
2. The tail gas purifying and absorbing structure for the high-yield preparation of the dilute nitric acid according to claim 1, wherein a plurality of the guide tubes (1602) are circularly and symmetrically distributed with a central point of the guide tube (1601) as a circular point.
3. The tail gas purification and absorption structure for the high-yield preparation of the dilute nitric acid according to claim 1, wherein a fixing plate (10) is fixedly connected between one side of the circumference of the second water pipe (9) and the outer wall of the circumference of the absorption tower (1).
4. The tail gas purification and absorption structure for the high-yield preparation of dilute nitric acid according to any one of claims 1-3, wherein a reinforcing plate (13) is fixedly connected between one side of the circumference of the second water pipe (9) and the inner wall of the top of the absorption tower (1).
5. The tail gas purification and absorption structure for the high-yield dilute nitric acid preparation according to claim 1, wherein the circumferential outer walls of the tail gas pipe (2), the absorption liquid pipe (4), the first water pipe (6), the second water pipe (9) and the liquid discharge pipe (11) are all provided with hydraulic sealing elements (15), and the hydraulic sealing elements (15) are all in contact with the absorption tower (1).
6. The tail gas purifying and absorbing structure for the preparation of the dilute nitric acid with high yield according to claim 1, wherein one side of the circumference of the absorption tower (1) is provided with an observation window (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220457819.0U CN216935449U (en) | 2022-03-04 | 2022-03-04 | A tail gas purification absorption structure for preparation of high yield dilute nitric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220457819.0U CN216935449U (en) | 2022-03-04 | 2022-03-04 | A tail gas purification absorption structure for preparation of high yield dilute nitric acid |
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| Publication Number | Publication Date |
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| CN216935449U true CN216935449U (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220457819.0U Active CN216935449U (en) | 2022-03-04 | 2022-03-04 | A tail gas purification absorption structure for preparation of high yield dilute nitric acid |
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| CN (1) | CN216935449U (en) |
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- 2022-03-04 CN CN202220457819.0U patent/CN216935449U/en active Active
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