CN214991331U - Circulating ammonia water waste heat utilization system - Google Patents
Circulating ammonia water waste heat utilization system Download PDFInfo
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- CN214991331U CN214991331U CN202120817030.7U CN202120817030U CN214991331U CN 214991331 U CN214991331 U CN 214991331U CN 202120817030 U CN202120817030 U CN 202120817030U CN 214991331 U CN214991331 U CN 214991331U
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Coke Industry (AREA)
Abstract
The utility model relates to a circulating ammonia water waste heat utilization system, which comprises a coke oven flue, a circulating ammonia water storage device, a coke oven spraying device and a waste heat recovery device; a liquid return pipe is arranged between the circulating ammonia water storage device and the waste heat recovery device, the coke oven spraying device is arranged in a coke oven flue, and a liquid outlet pipe is arranged between the coke oven flue and the waste heat recovery device; the heat recovery device comprises a first-stage waste heat recovery unit and a second-stage waste heat recovery unit; the first-stage waste heat recovery unit comprises a shell, a first pipe body, a liquid inlet pipe and a liquid outlet pipe; the shell is sleeved on the pipe body, the shell and the pipe body enclose to form a heating cavity, one ends of the liquid inlet pipe and the liquid outlet pipe are respectively fixed on the shell, the second-stage waste heat recovery unit comprises a box body and a second pipe body, the second pipe body and the liquid inlet pipe are inserted into the box body, and the other end of the second pipe body is connected with the liquid return pipe; and the ammonia water waste heat is utilized in a two-stage mode, so that the utilization rate of the ammonia water waste heat is improved.
Description
Technical Field
The utility model belongs to circulation aqueous ammonia waste heat recovery utilizes the system, concretely relates to circulation aqueous ammonia waste heat utilization system.
Background
The coke oven adopts coal as raw material, and under the conditions of high temperature and air isolation, the coal is carbonized and distilled to produce coke and simultaneously produce coal gas. In the coking process, the gas generated from the coking chamber of the coke oven has higher temperature, and ammonia water is needed to be adopted for spraying, cooling and deslagging; the temperature of the sprayed ammonia water is generally 70-90 ℃, and the ammonia water needs to be cooled and recycled. The ammonia carries a large amount of heat, causing heat waste.
The chinese utility model patent with the publication number CN208042864U discloses a "coking circulating ammonia water waste heat utilization system", which comprises a circulating ammonia water storage device for storing circulating ammonia water; the coke oven spraying device sprays and cools the raw coke oven gas by using circulating ammonia water; the waste heat recovery device is arranged between the circulating ammonia water storage device and the coke oven spraying device, and is used for recovering the waste heat of the circulating ammonia water from the circulating ammonia water storage device and refrigerating or heating by utilizing the recovered waste heat; thereby realizing the recycling of the waste heat of the circulating ammonia water. However, the system recovers the waste heat of the ammonia water through the waste heat recovery device, and uses the heat for refrigeration or heating, so that the effect of recovering the waste heat of the ammonia water is poor, and the waste heat of the ammonia water is not fully utilized.
SUMMERY OF THE UTILITY MODEL
In order to improve the utilization rate of the waste heat of the ammonia water, the utility model provides a circulating ammonia water waste heat utilization system; in order to achieve the above object, the utility model discloses a technical scheme specifically as follows:
a circulating ammonia water waste heat utilization system comprises a coke oven flue, a circulating ammonia water storage device, a coke oven spraying device and a waste heat recovery device; a liquid inlet pipe is arranged between the circulating ammonia water storage device and the coke oven spraying device, a liquid return pipe is arranged between the circulating ammonia water storage device and the waste heat recovery device, the coke oven spraying device is arranged in a coke oven flue, and a liquid outlet pipe is arranged between the coke oven flue and the waste heat recovery device; the waste heat recovery device comprises a first-stage waste heat recovery unit and a second-stage waste heat recovery unit; the first-stage waste heat recovery unit comprises a shell, a first pipe body, a liquid inlet pipe and a liquid outlet pipe; the shell is sleeved on the pipe body, the shell and the pipe body enclose to form a heating cavity, one ends of the liquid inlet pipe and the liquid outlet pipe are respectively fixed on the shell, the second-stage waste heat recovery unit comprises a box body and a second pipe body, the second pipe body and the liquid inlet pipe are inserted through the box body, and the box body is filled with heat transfer media; one end of the first tube body is connected with the liquid outlet tube, and the other end of the first tube body is connected with the second tube body; the other end of the second pipe body is connected with the liquid return pipe.
The utility model discloses a circulating ammonia water waste heat utilization system's beneficial effect: the ammonia water which cools the coal gas in the coke oven flue flows into the waste heat recovery device through the liquid outlet pipe, and the first-stage waste heat recovery unit heats the liquid in the heating cavity by using the high-temperature ammonia water; the second-stage waste heat recovery unit preheats the ammonia water flowing to the coke oven spraying device by using the cooled ammonia water with lower temperature, so that the ammonia water with too low temperature is prevented from being sprayed into a flue of the coke oven, and the influence on the denitration temperature is reduced; and the ammonia water waste heat is utilized in a two-stage mode, so that the utilization rate of the ammonia water waste heat is improved.
Further, the first pipe body comprises a first main pipe, a second main pipe and branch pipes; and two ends of the branch pipe are respectively and fixedly connected with opposite ends of the first main pipe and the second main pipe.
Has the advantages that: adopt and to divide the tubular construction, increase the area of contact of first body and heating intracavity liquid, be favorable to the heat exchange of first body and heating intracavity, improve the cooling capacity of first order waste heat recovery unit to the aqueous ammonia.
Further, the number of the branch pipes is at least 3, and the branch pipes are evenly arranged along the circumferential direction of the first main pipe at intervals.
Has the advantages that: the branch pipe is arranged along the circumference of the first main pipe at uniform intervals, so that the liquid in the heating cavity can be uniformly heated, and the cooling capacity of the first-stage waste heat recovery unit for ammonia water can be further improved.
Furthermore, the second pipe body and the liquid inlet pipe which are positioned in the box body are respectively spiral pipes.
Has the advantages that: the second body and the liquid inlet pipe which are positioned in the box body are arranged into a spiral pipe, the length of the second body and the length of the liquid inlet pipe which are positioned in the box body are increased, and the heat exchange is facilitated to be fully carried out.
Furthermore, the circulating ammonia water storage device comprises a tank body and a liquid pump arranged in the tank body, and one end of the liquid inlet pipe close to the circulating ammonia water storage device extends into the tank body and is connected with the liquid pump; and a liquid supplementing pipe is arranged on one side of the tank body.
Has the advantages that: the liquid pump pumps the ammonia water in the tank body to the liquid inlet pipe, so that the pressure of the liquid inlet pipe is increased, and the ammonia water is favorably sprayed into a flue of the coke oven through the coke oven spraying device.
Furthermore, the coke oven spraying device comprises a main pipeline and a plurality of spray heads, wherein one end of the main pipeline is connected with the liquid inlet pipe, the other end of the main pipeline is sealed, and the spray heads are uniformly arranged at intervals along the length direction of the main pipeline.
Has the advantages that: the coke oven spraying device is arranged into a main pipeline and a plurality of nozzle structures, has simple structure and is beneficial to uniformly spraying ammonia water into the flue of the coke oven.
Furthermore, a reducing pipe is arranged between the main pipeline and the liquid inlet pipe, the large-diameter end of the reducing pipe is connected with the liquid inlet pipe, and the small-diameter end of the reducing pipe is in butt joint with the main pipeline.
Has the advantages that: the reducing pipe changes the aperture of the flow passage, is favorable for increasing the flowing pressure of the ammonia water in the main pipeline and is favorable for the ammonia water to be sprayed out from the spray head.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of a system for utilizing waste heat from circulating ammonia water according to the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a partial cross-sectional view of an embodiment of the system for utilizing waste heat of circulating ammonia water according to the present invention;
FIG. 4 is a second partial cross-sectional view of the embodiment of the system for utilizing waste heat of circulating ammonia water according to the present invention;
fig. 5 is a third partial sectional view of the embodiment of the system for utilizing waste heat from circulating ammonia water of the present invention.
Reference numbers in the figures: 1-coke oven flue, 2-circulating ammonia water storage device, 21-tank body, 22-liquid drawing pump, 23-liquid supplementing pipe, 3-coke oven spraying device, 31-main pipe, 32-spray head, 33-reducing pipe, 4-waste heat recovery device, 41-shell, 42-liquid injection pipe, 43-liquid discharge pipe, 44-heating cavity, 45-first main pipe, 46-second main pipe, 47-branch pipe, 48-box body, 49-second pipe body, 5-liquid inlet pipe, 6-liquid return pipe and 7-liquid discharge pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:
the embodiment of the circulating ammonia water waste heat utilization system of the utility model has the specific structure as shown in figures 1-5, and comprises a coke oven flue 1, a circulating ammonia water storage device 2, a coke oven spraying device 3 and a waste heat recovery device 4; a liquid inlet pipe 5 is arranged between the circulating ammonia water storage device 2 and the coke oven spraying device 3, a liquid return pipe 5 is arranged between the circulating ammonia water storage device 2 and the waste heat recovery device 4, the coke oven spraying device 3 is arranged in a coke oven flue 1, and a liquid outlet pipe 7 is arranged between the coke oven flue 1 and the waste heat recovery device 4.
The waste heat recovery device 4 comprises a first-stage waste heat recovery unit and a second-stage waste heat recovery unit; the first-stage waste heat recovery unit comprises a shell 41, a first pipe body, a liquid injection pipe 42 and a liquid discharge pipe 43; the casing 41 is sleeved on the pipe body, the casing 41 and the pipe body enclose to form a heating cavity 44, one end of the liquid injection pipe 42 and one end of the liquid outlet pipe 7 are respectively fixed on the casing 41, and the second-stage waste heat recovery unit comprises a box body 48 and a second pipe body 49. In the present embodiment, the first pipe body includes a first main pipe 35, a second main pipe 46, and a branch pipe 47; both ends of the branch pipe 47 are fixedly connected with the opposite ends of the first main pipe 35 and the second main pipe 46, respectively; adopt and be in charge of 47 structures, increase the area of contact of first body and heating chamber 44 interior liquid, be favorable to the heat exchange in first body and the heating chamber 44, improve the cooling capacity of first order waste heat recovery unit to the aqueous ammonia. The number of the branch pipes 47 is 3, and the branch pipes are uniformly arranged at intervals along the circumferential direction of the first main pipe 35; the branch pipes 47 are uniformly arranged along the circumferential direction of the first main pipe 35 at intervals, so that the liquid in the heating cavity 44 can be uniformly heated, and the cooling capacity of the first-stage waste heat recovery unit on ammonia water can be further improved. In other embodiments, the number of the branch pipes is 4 or more than 5, and the branch pipes are uniformly arranged at intervals along the circumferential direction of the first main pipe.
The second pipe body 49 and the liquid inlet pipe 5 are inserted through the box body 48, and the box body 48 is filled with heat transfer medium which is water; one end of the first tube body is connected with the liquid outlet tube 7, and the other end of the first tube body is connected with the second tube body 49; the other end of the second tube 49 is connected to the liquid return tube 5. In this embodiment, the second pipe 49 and the liquid inlet pipe 5 in the box 48 are respectively spiral pipes; the second pipe 49 and the liquid inlet pipe 5 in the tank 48 are arranged to be spiral pipes, and the length of the second pipe 49 and the liquid inlet pipe 5 in the tank 48 is increased, which is beneficial to the full performance of heat exchange. In other embodiments, the second pipe and the liquid inlet pipe in the box body are straight pipes, and the spiral pipe is replaced by increasing the length of the straight pipes.
In this embodiment, the circulating ammonia water storage device 2 includes a tank 21 and a liquid pump 22 disposed in the tank 21, and one end of the liquid inlet pipe 5 near the circulating ammonia water storage device 2 extends into the tank 21 and is connected to the liquid pump 22; a liquid supplementing pipe 23 is arranged on one side of the tank body 21; the liquid pump 22 pumps the ammonia water in the tank body 21 to the liquid inlet pipe 5, increases the pressure of the liquid inlet pipe 5, and is favorable for the ammonia water to be sprayed into the coke oven flue 1 through the coke oven spraying device 3.
In the embodiment, the coke oven spraying device 3 comprises a main pipe 31 and a plurality of spray heads 32, one end of the main pipe 31 is connected with the liquid inlet pipe 5, the other end of the main pipe 31 is sealed, and the spray heads 32 are uniformly arranged at intervals along the length direction of the main pipe 31; the coke oven spraying device 3 is arranged into a main pipe 31 and a plurality of spray heads 32, has simple structure and is beneficial to uniformly spraying ammonia water into the flue 1 of the coke oven. A reducing pipe 33 is arranged between the main pipe 31 and the liquid inlet pipe 5, the large-diameter end of the reducing pipe 33 is connected with the liquid inlet pipe 5, and the small-diameter end of the reducing pipe 33 is butted with the main pipe 31; the reducing pipe 33 changes the aperture of the flow passage, which is beneficial to increasing the flowing pressure of the ammonia water in the main pipe 31 and spraying the ammonia water from the spray head 32. In other embodiments, a reducing pipe is not arranged between the main pipe and the liquid inlet pipe, and the main pipe is in butt joint with the liquid inlet pipe.
When the device is used, the liquid pump 22 pumps the ammonia water in the circulating ammonia water storage device 2 to the liquid inlet pipe 5, the ammonia water is sprayed into the coke oven flue 1 through the coke oven spraying device 3 for cooling and flows to the waste heat recovery device 4 through the liquid outlet pipe 7, and the primary waste heat recovery unit utilizes the high-temperature ammonia water to heat the liquid in the heating cavity 44; the second-stage waste heat recovery unit preheats the ammonia water flowing to the coke oven spraying device 3 by using the cooled ammonia water with lower temperature, so that the ammonia water with too low temperature is prevented from being sprayed into the coke oven flue 1, and the influence on the denitration temperature is reduced; and flows back into the circulating ammonia water storage device 2 through a liquid return pipe 5.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (7)
1. A circulating ammonia water waste heat utilization system comprises a coke oven flue, a circulating ammonia water storage device, a coke oven spraying device and a waste heat recovery device; a liquid inlet pipe is arranged between the circulating ammonia water storage device and the coke oven spraying device, a liquid return pipe is arranged between the circulating ammonia water storage device and the waste heat recovery device, the coke oven spraying device is arranged in a coke oven flue, and a liquid outlet pipe is arranged between the coke oven flue and the waste heat recovery device; the waste heat recovery device is characterized by comprising a first-stage waste heat recovery unit and a second-stage waste heat recovery unit; the first-stage waste heat recovery unit comprises a shell, a first pipe body, a liquid injection pipe and a liquid outlet pipe; the shell is sleeved on the pipe body, the shell and the pipe body enclose to form a heating cavity, one ends of the liquid injection pipe and the liquid outlet pipe are respectively fixed on the shell, the second-stage waste heat recovery unit comprises a box body and a second pipe body, the second pipe body and the liquid inlet pipe are inserted through the box body, and the box body is filled with heat transfer media; one end of the first tube body is connected with the liquid outlet tube, and the other end of the first tube body is connected with the second tube body; the other end of the second pipe body is connected with the liquid return pipe.
2. The system for utilizing the waste heat of the circulating ammonia water as claimed in claim 1, wherein the first pipe body comprises a first main pipe, a second main pipe and branch pipes; and two ends of the branch pipe are respectively and fixedly connected with opposite ends of the first main pipe and the second main pipe.
3. The system for utilizing waste heat of circulating ammonia water as claimed in claim 2, wherein the number of the branch pipes is at least 3, and the branch pipes are uniformly arranged at intervals along the circumferential direction of the first main pipe.
4. The system for utilizing the waste heat of the circulating ammonia water as claimed in claim 1, wherein the second pipe body and the liquid inlet pipe in the box body are respectively spiral pipes.
5. The system for utilizing the waste heat of the circulating ammonia water as claimed in claim 1, wherein the circulating ammonia water storage device comprises a tank body and a liquid pump arranged in the tank body, and one end of the liquid inlet pipe close to the circulating ammonia water storage device extends into the tank body and is connected with the liquid pump; and a liquid supplementing pipe is arranged on one side of the tank body.
6. The circulating ammonia water waste heat utilization system of claim 1, wherein the coke oven spraying device comprises a main pipe and a plurality of spray heads, one end of the main pipe is connected with the liquid inlet pipe, the other end of the main pipe is sealed, and the spray heads are uniformly arranged at intervals along the length direction of the main pipe.
7. The system for utilizing waste heat of circulating ammonia water as claimed in claim 6, wherein a reducing pipe is arranged between the main pipeline and the liquid inlet pipe, the large diameter end of the reducing pipe is connected with the liquid inlet pipe, and the small diameter end of the reducing pipe is butted with the main pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120817030.7U CN214991331U (en) | 2021-04-21 | 2021-04-21 | Circulating ammonia water waste heat utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120817030.7U CN214991331U (en) | 2021-04-21 | 2021-04-21 | Circulating ammonia water waste heat utilization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214991331U true CN214991331U (en) | 2021-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120817030.7U Active CN214991331U (en) | 2021-04-21 | 2021-04-21 | Circulating ammonia water waste heat utilization system |
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| CN (1) | CN214991331U (en) |
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2021
- 2021-04-21 CN CN202120817030.7U patent/CN214991331U/en active Active
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