CN215177172U - Tail gas waste heat recovery device for heating ammonium chloride - Google Patents
Tail gas waste heat recovery device for heating ammonium chloride Download PDFInfo
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- CN215177172U CN215177172U CN202121248844.XU CN202121248844U CN215177172U CN 215177172 U CN215177172 U CN 215177172U CN 202121248844 U CN202121248844 U CN 202121248844U CN 215177172 U CN215177172 U CN 215177172U
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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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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The utility model belongs to the technical field of chemical production devices, and provides a tail gas waste heat recovery device for heating ammonium chloride, which has simple structure, reduces the production cost and improves the exchange efficiency; the technical scheme is as follows: the top of quench tower is equipped with flash distillation tail gas entry, upper portion is equipped with the circulating liquid entry, the bottom outlet is connected with scrubbing tower middle part entry, the scrubbing tower inner chamber is equipped with first spray set, the filler district, second spray set, scrubbing tower bottom outlet is linked together with first spray set entry through first return pipe, be provided with the heat exchanger on the first return pipe, the filler district below of scrubbing tower is equipped with middle extraction section, middle extraction section passes through second return pipe and second spray set entry linkage, the circulating liquid entry of quench tower passes through third return pipe and second return pipe intercommunication, the medium chamber entry and the export intercommunication of first return pipe and heat exchanger, the fluid cavity entry and the ammonium chloride jar intercommunication of heat exchanger, the fluid cavity export and the continuous reation kettle upper portion batching of two of heat exchangers add mouthful intercommunication.
Description
Technical Field
The utility model relates to a tail gas waste heat recovery device of heating ammonium chloride belongs to chemical production device's technical field, concretely relates to waste heat recovery of flash distillation tail gas.
Background
In the existing chemical production system, ammonium chloride needs to directly enter a secondary cross continuous reaction kettle to exchange and reduce the sodium oxide content of a secondary cross reaction material, because the ammonium chloride is directly conveyed from a tank field, the temperature is normal temperature, the reaction temperature of the secondary cross reaction kettle is 70 ℃, and because the temperature of the ammonium chloride is lower, the exchange efficiency of the secondary cross reaction is reduced. The flash evaporation tail gas generated by the production system can meet the emission standard after being subjected to temperature reduction and impurity removal treatment. Therefore, after the original production line is built, the production line is determined to be modified for economic benefit consideration, and economic benefit of enterprises is maximized.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes the deficiencies in the prior art, the technical problem who solves is: the tail gas waste heat recovery device for heating ammonium chloride is simple in structure, reduces production cost and improves exchange efficiency.
In order to solve the technical problem, the utility model discloses a technical scheme be: a tail gas waste heat recovery device for heating ammonium chloride comprises a quench tower, a washing tower, a settling tank, a heat exchanger, an ammonium chloride tank and two cross-continuous reaction kettles;
the top end of the quench tower is provided with a flash evaporation tail gas inlet, one side of the upper part of the quench tower is provided with a circulating liquid inlet, the bottom outlet of the quench tower is connected with the middle inlet of the washing tower, the middle part of the inner cavity of the washing tower is provided with a first spray device, the upper part of the inner cavity of the washing tower is provided with a second spray device, a packing area is arranged between the first spray device and the second spray device, the bottom outlet of the washing tower is connected with one end of a first return pipe, the other end of the first return pipe is communicated with the inlet of the first spray device, the first return pipe is provided with a first pump, an impurity remover and a heat exchanger, an intermediate extraction section is arranged below the packing area of the washing tower, the intermediate extraction section is connected with one end of a second return pipe, the other end of the second return pipe is connected with the inlet of the second spray device, the second return pipe is provided with a settling tank and a second pump, and one end of a third return pipe is connected with the second return pipe, the other end of the third return pipe is communicated with a circulating liquid inlet of the quenching tower, and a third pump is arranged on the third return pipe; the first return pipe is communicated with an inlet and an outlet of a medium cavity of the heat exchanger, a fluid cavity inlet of the heat exchanger is communicated with the ammonium chloride tank through a pipeline, and a fluid cavity outlet of the heat exchanger is communicated with an upper part ingredient adding port of the two-way continuous reaction kettle through a pipeline.
The heat exchanger is of a tube array heat exchange structure, the first return tube is communicated with an inlet and an outlet of a shell cavity of the heat exchanger, an inlet of the tube array cavity of the heat exchanger is communicated with the ammonium chloride tank through a pipeline, and an outlet of the tube array cavity of the heat exchanger is communicated with an upper part ingredient adding port of the two-way continuous reaction kettle.
The heat exchanger is a double-section cooler;
the heat exchanger comprises a transverse cylindrical shell, the right end of the shell is connected with an ammonium chloride tank through a pipeline, the left end of the shell is communicated with an upper ingredient adding port of two cross-linking reaction kettles through a pipeline, a sealing medium cavity is formed at the left part of an inner cavity of the shell through a left sealing plate and a right sealing plate, the lower end of the sealing medium cavity is communicated with a bottom outlet of a quench tower through a pipeline, the upper end of the sealing medium cavity is communicated with a middle inlet of a washing tower through a pipeline, a plurality of transverse pipes with two open ends are hermetically arranged between the left sealing plate and the right sealing plate, a pipe body of each transverse pipe is positioned in the sealing medium cavity, two ends of each transverse pipe are positioned outside the sealing medium cavity, a sealing box is hermetically sleeved on the outer wall of the right part of the shell, a plurality of vertical pipes are uniformly and vertically hermetically arranged at the right part of the shell, two ends of each vertical pipe are positioned in the sealing boxes, and the upper end and the lower end of each sealing box are communicated with a first return pipe, and the lower end of the seal box is close to the outlet at the bottom end of the washing tower.
And impurity cleaning ports are formed in the sealing medium cavity and the bottom of the sealing box.
Compared with the prior art, the utility model following beneficial effect has:
1. the utility model recovers heat in the flash evaporation tail gas through the quench tower and the washing tower, and exchanges heat with the heat exchanger for ammonium chloride, so that the ammonium chloride enters the two-way continuous reaction kettle after the temperature of the ammonium chloride is raised, the adding proportion of the ammonium chloride is reduced by 10 percent under the condition of keeping the stability of the product material sodium oxide, the waste heat of the device is utilized, the temperature of the ammonium chloride is improved, and the exchange efficiency is greatly improved;
2. the utility model discloses a heat exchanger of two-stage process exchange, the heat after the spray set of scrubbing tower lower part has carried tail gas aftercooling carries out preliminary intensification to ammonium chloride through the heat exchanger, and the circulation liquid in the quench tower carries a refrigerated high fever tail gas and carries out the secondary intensification to ammonium chloride for ammonium chloride's heat exchange efficiency is higher, and the heat utilization rate of recovery is higher.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings;
fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a heat exchanger according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
As shown in fig. 1, the device for recovering waste heat of tail gas generated by heating ammonium chloride of the present invention comprises a quench tower 1, a washing tower 2, a settling tank 3, a heat exchanger 4, an ammonium chloride tank 5 and a two-way continuous reaction kettle 6;
the top end of the quench tower 1 is provided with a flash evaporation tail gas inlet, one side of the upper part of the quench tower 1 is provided with a circulating liquid inlet, the outlet at the bottom end of the quench tower 1 is connected with the inlet at the middle part of the washing tower 2, the middle part of the inner cavity of the washing tower 2 is provided with a first spraying device 7, the upper part of the inner cavity of the washing tower 2 is provided with a second spraying device 8, a packing area 9 is arranged between the first spraying device 7 and the second spraying device 8, the outlet at the bottom end of the washing tower 2 is connected with one end of a first return pipe 10, the other end of the first return pipe 10 is communicated with the inlet of the first spraying device 7, the first return pipe 10 is provided with a first pump 11, an impurity remover 12 and a heat exchanger 4, a middle extraction section is arranged below the packing area 9 of the washing tower 2, the middle extraction section is connected with one end of a second return pipe 13, the other end of the second return pipe 13 is connected with the inlet of the second spraying device 8, a settling tank 3 and a second pump 14 are arranged on the second return pipe 13, one end of a third return pipe 15 is connected to the second return pipe 13, the other end of the third return pipe 15 is communicated with a circulating liquid inlet of the quenching tower 1, and a third pump 16 is arranged on the third return pipe 15; the first return pipe 10 is communicated with an inlet and an outlet of a medium cavity of the heat exchanger 4, the inlet of the fluid cavity of the heat exchanger 4 is communicated with the ammonium chloride tank 5 through a pipeline, and the outlet of the fluid cavity of the heat exchanger 4 is communicated with an upper ingredient adding port of the two-way continuous reaction kettle 6 through a pipeline.
The heat exchanger 4 is of a tube array heat exchange structure, the first return pipe 10 is communicated with an inlet and an outlet of a shell cavity of the heat exchanger 4, an inlet of the tube array cavity of the heat exchanger 4 is communicated with the ammonium chloride tank 5 through a pipeline, and an outlet of the tube array cavity of the heat exchanger 4 is communicated with an upper part batching adding port of the two-way continuous reaction kettle 6.
The working principle is as follows: flash distillation tail gas carries out the very fast cooling of first time through quench tower 1, the gas-liquid mixture after the cooling gets into the scrubbing tower, liquid is downward and the separation of air current upwards, it further carries out the edulcoration of cooling to tail gas to spray through first spray set 7, tail gas is at scrubbing tower 2 inside to the upper cooling, remove dust, evacuation up to standard after the desulfurization, the heat is most to remain in the circulating liquid, the circulating liquid flows into heat exchanger 4 from scrubbing tower 2 bottom, carry out the heat energy exchange with ammonium chloride after, get into scrubbing tower 2's first spray set 7 circulation use once more, second return pipe 13 is sent to second spray set 8 through the circulating liquid in the middle extraction section extraction scrubbing tower 2 and is sprayed the cooling edulcoration, increase the number of times that sprays in the scrubbing tower, the partial circulating liquid in third return pipe 15 extraction second return pipe sends into quench tower 1 and tentatively cools down flash distillation tail gas.
Example two
The basic structure of the present embodiment is the same as that of the first embodiment, except that the heat exchanger 4 is a double-stage cooler;
as shown in fig. 2-3, the heat exchanger 4 includes a horizontally-arranged cylindrical housing 41, the right end of the housing 41 is connected with the ammonium chloride tank 5 through a pipeline, the left end of the housing 41 is communicated with the upper ingredient adding port of the two-way continuous reaction kettle 6 through a pipeline, the left portion of the inner cavity of the housing 41 forms a sealed medium cavity through a left sealing plate 42 and a right sealing plate 43, the lower end of the sealed medium cavity is communicated with the bottom outlet of the quench tower 1 through a pipeline, the upper end of the sealed medium cavity is communicated with the middle inlet of the washing tower 2 through a pipeline, a plurality of transverse pipes 44 with two open ends are hermetically installed between the left sealing plate 42 and the right sealing plate 43, the pipe bodies of the transverse pipes 44 are located inside the sealed medium cavity, and two ends of the transverse pipes are located outside the sealed medium cavity, a sealing box 45 is hermetically sealed and connected to the outer wall of the right portion of the housing 41, and a plurality of vertical pipes 46 are uniformly and vertically and hermetically installed at the right portion of the housing 41, the tube body of the vertical tube 46 is located in the casing 41, and both ends of the vertical tube are located in the sealing box 45, the upper end and the lower end of the sealing box 45 are both communicated with the first return tube 10, and the lower end of the sealing box 45 is close to the bottom outlet of the washing tower 2.
And impurity cleaning ports are formed at the bottoms of the sealing medium cavity and the sealing box 45, so that part of impurities separated out from the flash evaporation tail gas in the system can be cleaned regularly.
The theory of operation of this embodiment is the same with embodiment one, owing to used the heat exchanger of two-stage process exchange, and the spray set of scrubbing tower lower part has carried the heat behind the tail gas aftercooling and has carried out preliminary intensification to ammonium chloride through the heat exchanger, and the circulation liquid in the quench tower carries a refrigerated high fever tail gas and carries out the secondary intensification to ammonium chloride for ammonium chloride's heat exchange efficiency is higher, and the heat utilization rate of recovery is higher.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (4)
1. The utility model provides a tail gas waste heat recovery device of heating ammonium chloride which characterized in that: comprises a quench tower (1), a washing tower (2), a settling tank (3), a heat exchanger (4), an ammonium chloride tank (5) and two cross-continuous reaction kettles (6);
the top end of the quench tower (1) is provided with a flash evaporation tail gas inlet, one side of the upper part of the quench tower (1) is provided with a circulating liquid inlet, the bottom outlet of the quench tower (1) is connected with the middle inlet of the washing tower (2), the middle part of the inner cavity of the washing tower (2) is provided with a first spray device (7), the upper part of the inner cavity of the washing tower (2) is provided with a second spray device (8), a packing area (9) is arranged between the first spray device (7) and the second spray device (8), the bottom outlet of the washing tower (2) is connected with one end of a first return pipe (10), the other end of the first return pipe (10) is communicated with the inlet of the first spray device (7), the first return pipe (10) is provided with a first pump (11), an impurity remover (12) and a heat exchanger (4), a middle extraction section is arranged below the packing area (9) of the washing tower (2), and the middle extraction section is connected with one end of a second return pipe (13), the other end of the second return pipe (13) is connected with an inlet of a second spraying device (8), a settling tank (3) and a second pump (14) are installed on the second return pipe (13), one end of a third return pipe (15) is connected to the second return pipe (13), the other end of the third return pipe (15) is communicated with a circulating liquid inlet of the quenching tower (1), and a third pump (16) is installed on the third return pipe (15); the first return pipe (10) is communicated with an inlet and an outlet of a medium cavity of the heat exchanger (4), a fluid cavity inlet of the heat exchanger (4) is communicated with the ammonium chloride tank (5) through a pipeline, and a fluid cavity outlet of the heat exchanger (4) is communicated with an upper part ingredient adding port of the two-way continuous reaction kettle (6) through a pipeline.
2. The device for recovering the waste heat of the tail gas generated by heating the ammonium chloride according to claim 1, is characterized in that: the heat exchanger (4) is of a tube array heat exchange structure, the first return tube (10) is communicated with the inlet and the outlet of a shell cavity of the heat exchanger (4), the inlet of the tube array cavity of the heat exchanger (4) is communicated with the ammonium chloride tank (5) through a pipeline, and the outlet of the tube array cavity of the heat exchanger (4) is communicated with an upper part batching adding port of the two-way continuous reaction kettle (6).
3. The device for recovering the waste heat of the tail gas generated by heating the ammonium chloride according to claim 1, is characterized in that: the heat exchanger (4) is a double-section cooler;
the heat exchanger (4) comprises a transverse cylindrical shell (41), the right end of the shell (41) is connected with an ammonium chloride tank (5) through a pipeline, the left end of the shell (41) is communicated with an upper ingredient adding port of the two-way continuous reaction kettle (6) through a pipeline, the left part of an inner cavity of the shell (41) forms a sealing medium cavity through a left sealing plate (42) and a right sealing plate (43), the lower end of the sealing medium cavity is communicated with a bottom outlet of the quench tower (1) through a pipeline, the upper end of the sealing medium cavity is communicated with a middle inlet of the washing tower (2) through a pipeline, a plurality of transverse pipes (44) with two open ends are hermetically arranged between the left sealing plate (42) and the right sealing plate (43), a pipe body of each transverse pipe (44) is positioned inside the sealing medium cavity, two ends of each transverse pipe are positioned outside the sealing medium cavity, and a sealing box (45) is hermetically sleeved on the outer wall of the right part of the shell (41), the even vertical seal in right part of casing (41) is provided with a plurality of standpipe (46), the body of standpipe (46) is located casing (41) and its both ends all are located seal box (45), and the upper and lower end of seal box (45) all is linked together with first time pipe (10), and the lower extreme of seal box (45) is close to the bottom export of scrubbing tower (2).
4. The device for recovering the waste heat of the tail gas generated by heating ammonium chloride according to claim 3, characterized in that: and impurity cleaning openings are formed in the bottom of the sealing medium cavity and the bottom of the sealing box (45).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121248844.XU CN215177172U (en) | 2021-06-05 | 2021-06-05 | Tail gas waste heat recovery device for heating ammonium chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121248844.XU CN215177172U (en) | 2021-06-05 | 2021-06-05 | Tail gas waste heat recovery device for heating ammonium chloride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215177172U true CN215177172U (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121248844.XU Active CN215177172U (en) | 2021-06-05 | 2021-06-05 | Tail gas waste heat recovery device for heating ammonium chloride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215177172U (en) |
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2021
- 2021-06-05 CN CN202121248844.XU patent/CN215177172U/en active Active
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