CN210736672U - Multistage composite ammonia washing system for tower internal cooling - Google Patents
Multistage composite ammonia washing system for tower internal cooling Download PDFInfo
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- CN210736672U CN210736672U CN201921803034.9U CN201921803034U CN210736672U CN 210736672 U CN210736672 U CN 210736672U CN 201921803034 U CN201921803034 U CN 201921803034U CN 210736672 U CN210736672 U CN 210736672U
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- ammonia
- tower
- liquid
- washing
- heat exchange
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 181
- 238000005406 washing Methods 0.000 title claims abstract description 93
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 91
- 238000001816 cooling Methods 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 title claims description 12
- 239000007788 liquid Substances 0.000 claims abstract description 55
- 238000012856 packing Methods 0.000 claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims abstract description 6
- 239000003513 alkali Substances 0.000 claims abstract description 3
- 239000007791 liquid phase Substances 0.000 claims description 24
- 239000000110 cooling liquid Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005201 scrubbing Methods 0.000 claims description 8
- 238000012546 transfer Methods 0.000 abstract description 20
- 238000010521 absorption reaction Methods 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 17
- 239000003034 coal gas Substances 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 6
- 238000000746 purification Methods 0.000 abstract description 5
- 230000008676 import Effects 0.000 abstract description 4
- 239000002826 coolant Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 11
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 8
- 235000011114 ammonium hydroxide Nutrition 0.000 description 8
- 238000005507 spraying Methods 0.000 description 6
- 230000009615 deamination Effects 0.000 description 4
- 238000006481 deamination reaction Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- AQGDXJQRVOCUQX-UHFFFAOYSA-N N.[S] Chemical compound N.[S] AQGDXJQRVOCUQX-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Gas Separation By Absorption (AREA)
Abstract
The utility model discloses an ammonia system is washed to multistage compound of in-tower internal cooling belongs to the coal gas purification field. The utility model discloses a wash the ammonia tower body, wash and set up the multilayer packing layer in the ammonia tower body, with dividing in the tower body and wash ammonia section and alkali wash section, be provided with the liquid redistributor between the packing layer, be provided with interior heat transfer circulating pipe between packing layer and the liquid redistributor, the import and the export of interior heat transfer circulating pipe are all located outside washing the ammonia tower body, and the coolant liquid is followed the import and is got into and is washed the final export discharge from interior heat transfer circulating pipe after the heat transfer that flows in the ammonia tower body. The utility model overcomes generally collect heat transfer medium, complex operation's difficult point in disconnected tower tray department among the prior art, plan to provide a multistage compound ammonia system of washing of in-tower cooling, can reduce in time high-efficiently and lead to the problem that absorption liquid temperature risees because of the ammonia absorption process is exothermic to strengthen tower absorption effect.
Description
Technical Field
The utility model relates to a coal gas purification technology field, more specifically say, relate to a multistage compound ammonia washing system of tower internal cooling.
Background
At present, the coal gas purification process generally adopts an ammonia-sulfur combined washing, desulfurization and deamination process, and an absorption unit of the process mainly comprises a desulfurization tower, an ammonia washing tower and a benzene washing tower. The ammonia washing tower comprises the following use processes: coal gas enters from the tower bottom and sequentially passes through a third ammonia washing section, a second ammonia washing section, an alkaline washing section and a first ammonia washing section. The washing water for absorbing ammonia gas sent by other units reversely contacts with coal gas from top to bottom, is cut out at the tower disc of the second ammonia washing section for heat exchange, and is sent to the third ammonia washing section by a pump to spray and absorb ammonia in the coal gas.
The absorption process of the ammonia gas is an exothermic reaction, the temperature rise of an absorption medium in the absorption process is not beneficial to the absorption reaction, the currently and generally adopted method is to lead out the washing liquid from the tower, and the washing liquid is subjected to heat exchange and cooling by a heat exchanger and then is pumped to the lower section of the ammonia washing tower, so that the process not only consumes a large amount of energy, but also increases the number of pipelines and equipment, and increases the workload of maintenance. And the heat exchange can be carried out only after the heat exchange is carried out at the bottom of each section of tower, the temperature of the medium is distributed in a ladder shape, and the uniformity and stability of the whole temperature of the tower body cannot be ensured. How to efficiently and stably control the temperature of the absorption liquid in the ammonia washing tower is used for the problem to be solved.
Through retrieval, the Chinese patent application number: 2017109663831, the name of invention creation is: the application discloses a deammoniation cooling tower and a purification washing method in a coal gas wet purification process, wherein a clean coal gas outlet is formed in the top of a shell of the deammoniation cooling tower, and a liquid outlet is formed in the bottom of the shell of the deammoniation cooling tower. The tower body of the deamination cooling tower is provided with three sections of circulating sections, and the lower part of the tower is provided with a circulating water spraying section which is mainly used for removing most of dust and ammonia in the crude gas and avoiding blocking the filler on the upper part; the middle circulating section continuously removes ammonia and dust; the upper circulation section is a fine washing section, and fresh water is added to ensure that the content of ammonia and dust in the tower top clean gas reaches the standard. The deamination cooling tower overcomes the problems of large pressure drop and poor deamination effect of the existing washing tower, but still has a larger space for improving the temperature of the absorption liquid in the tower.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved by the utility model
The utility model aims to overcome and generally collect heat transfer medium, complex operation's difficult point in disconnected tower tray department among the prior art, plan to provide a multistage compound ammonia system of washing of in-tower cooling, can reduce in time high-efficiently and lead to the problem that the absorbing liquid temperature risees because of the ammonia absorption process is exothermic to strengthen tower absorption effect.
2. Technical scheme
In order to achieve the above purpose, the utility model provides a technical scheme does:
the utility model discloses an ammonia system is washed to multistage complex of in-tower cooling, including washing the ammonia tower body, wash the internal multilayer packing layer that sets up of ammonia tower, with dividing to wash ammonia section and alkali wash section in the tower body, be provided with the liquid redistributor between the packing layer, be provided with interior heat transfer circulating pipe between packing layer and the liquid redistributor, the import and the export of interior heat transfer circulating pipe are all located outside washing the ammonia tower body, and the coolant liquid is followed the import and is got into and wash the final export discharge from interior heat transfer circulating pipe after the heat transfer that flows in the ammonia tower body.
Furthermore, a control valve is arranged on the water inlet of the inner heat exchange circulating pipe.
Furthermore, a liquid phase temperature measuring point is arranged below the inner heat exchange circulating pipe.
Furthermore, the liquid phase temperature measuring point is controlled by the control valve in an interlocking way.
Furthermore, a liquid enrichment unit is arranged below the internal heat exchange circulating pipe, and a liquid phase temperature measuring point extends into the liquid enrichment unit to be fully contacted with a liquid phase.
Furthermore, an enrichment cavity for enriching the liquid phase is arranged in the liquid enrichment unit, the top of the enrichment cavity is provided with an opening, the bottom of the enrichment cavity is provided with a circulation hole, and the size of the circulation hole is smaller than that of the opening at the top of the enrichment cavity.
Furthermore, the internal heat exchange circulating pipe is a tube type heat exchanger, and the cooling liquid inlet and the cooling liquid outlet of the internal heat exchange circulating pipe extend out of the ammonia washing tower body.
3. Advantageous effects
Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:
(1) the multistage composite ammonia washing system in the tower directly cools and exchanges heat with the washing liquid by adopting the heat exchanger in the tower, compared with the traditional mode, reduces a semi-rich ammonia water pump, a semi-rich ammonia water heat exchanger, a connecting pipeline and the like, reduces a tower tray for collecting circumscribed washing liquid, is replaced by a liquid redistributor, and simplifies the process flow; and secondly, the process that the washing liquid is led out from the lateral line of the middle part of the tower to be cooled and then is pumped to the lower ammonia washing section is eliminated, meanwhile, the contact area of the washing liquid and the outside is reduced, and the energy consumed by conveying fluid media is greatly reduced.
(2) The utility model discloses an ammonia system is washed to multistage complex of in-tower cooling can all set up this kind of inside refrigerated heat transfer structure in a plurality of positions of the not co-altitude department of tower body according to actual demand, carries out multistage heat transfer, can effectively guarantee that the temperature of co-altitude medium is unanimous, has promoted holistic tower body temperature stability, improves the absorption efficiency who washes the ammonia tower.
(3) The utility model discloses an ammonia system is washed in multistage complex of in-tower cooling, the below of interior heat transfer circulating pipe is provided with the liquid phase temperature measurement station, and the below of interior heat transfer circulating pipe is provided with liquid enrichment unit, and the liquid phase temperature measurement station extends in this liquid enrichment unit, guarantees that the liquid phase temperature measurement station can fully contact with the liquid phase of collecting wherein and influence the measurement accuracy.
Drawings
FIG. 1 is a schematic diagram of a prior art ammonia scrubber;
fig. 2 is a schematic structural diagram of a multi-stage composite ammonia scrubbing system with tower internal cooling according to the present invention.
The reference numerals in the schematic drawings illustrate:
100. an ammonia washing tower body; 101. a filler layer; 102. a gas inlet; 103. a coal gas outlet; 104. guiding a lateral line by semi-rich ammonia water; 105. a wash liquid inlet; 106. an alkaline washing liquid inlet; 107. a heat exchange outlet pipe; 108. a semi-ammonia-rich water pump; 109. a semi-rich ammonia water heat exchanger;
110. a flushing inlet; 200. an internal heat exchange circulating pipe; 201. a liquid enrichment unit; 202. a control valve; 203. measuring a liquid phase temperature; 204. a liquid redistributor.
Detailed Description
For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The present invention will be further described with reference to the following examples.
Example 1
As shown in fig. 1, the ammonia washing tower apparatus generally used in the prior art at present comprises an ammonia washing tower body 100, a multilayer packing layer 101 is arranged in the ammonia washing tower body 100, the inside of the tower body is divided into an ammonia washing section and an alkaline washing section by the multilayer packing layer 101, specifically, as shown in fig. 1, a first ammonia washing section, an alkaline washing section, a second ammonia washing section and a third ammonia washing section are arranged in sequence from top to bottom, a gas inlet 102 is arranged at the bottom of the ammonia washing tower body 100, a gas outlet 103 is arranged at the top of the ammonia washing tower body, a washing liquid inlet 105 is arranged at one side of the first ammonia washing section, washing liquid is sprayed in the tower in a spraying manner, and an alkaline washing liquid inlet 106 is arranged at one side of the alkaline washing section. When the ammonia gas washing tower is used, coal gas enters from the tower bottom and sequentially passes through the third ammonia washing section, the second ammonia washing section, the alkaline washing section and the first ammonia washing section, and ammonia washing water which is sent from other units and absorbs ammonia gas reversely contacts with the coal gas from top to bottom. The side of the ammonia washing tower body 100 is also provided with a semi-rich ammonia water guide lateral line 104. At present, tower trays are arranged among washing sections of a common ammonia washing tower, so that in order to avoid the problem caused by the exothermic reaction of ammonia gas absorption, heat exchange is cut at the tower tray of the second ammonia washing section, and the heat exchange is sent to the third ammonia washing section by a pump to spray and absorb ammonia in coal gas. Specifically, as shown in fig. 1, a washing liquid is led out from the second ammonia washing section tower tray through a heat exchange outlet pipe 107, a semi-rich ammonia water pump 108 and a semi-rich ammonia water heat exchanger 109 are arranged on the heat exchange outlet pipe 107, and the washing liquid is subjected to heat exchange and cooling by the heat exchanger and then is pumped to the lower section of the ammonia washing tower. This process not only consumes a large amount of energy, has increased pipeline and equipment quantity simultaneously, has increased the maintenance work load, and this heat transfer can only collect the back heat transfer at every section tower bottom, and the medium temperature presents the echelonment and distributes, can not guarantee that the tower body bulk temperature is even stable. The present embodiment is improved to solve this problem.
As shown in fig. 2, the multistage composite ammonia washing system with internal tower cooling of the present embodiment also includes an ammonia washing tower body 100, a multilayer packing layer 101 is disposed in the ammonia washing tower body 100, the inside of the tower body is also divided into an ammonia washing section and an alkaline washing section, a gas inlet 102, a gas outlet 103, a washing liquid inlet 105, an alkaline washing liquid inlet 106, a semi-rich ammonia water diversion lateral line 104 and other structural arrangements are not changed, and original styles are maintained, wherein a washing inlet 110 is further disposed on the washing liquid inlet 105, a spraying pipeline of the washing inlet 110 is located above a spraying pipeline of the washing liquid inlet 105, a layer of packing is disposed between the two spraying pipelines, and the spraying pipeline of the washing inlet 110 is mainly used for demisting and washing. It should be noted that, in this embodiment, a tray is not provided, but a liquid redistributor 204 is provided between the packing layers 101, an internal heat exchange circulation pipe 200 is provided between the packing layers 101 and the liquid redistributor 204, an inlet and an outlet of the internal heat exchange circulation pipe 200 are both provided outside the ammonia washing tower body 100, and the cooling liquid enters the ammonia washing tower body 100 from the inlet, undergoes flow heat exchange, and is finally discharged from the outlet of the internal heat exchange circulation pipe 200.
The internal heat exchange circulation pipe 200 in this embodiment is a tubular heat exchanger, the cooling liquid inlet and outlet of which extend outside the ammonia washing tower 100, and the water inlet of the internal heat exchange circulation pipe 200 is provided with a control valve 202. The heat exchanger adopts the coil pipe tube form, fully guarantees the heat transfer homogeneity, and this heat exchanger chooses for use corrosion-resistant stainless steel material in order to reduce the emergence of the condition of indirect heating equipment leakage, maintenance change. The tubular heat exchanger can adopt a U-shaped bent coil tube structure which is common in the industry, the tubular heat exchanger is arranged in a single-layer plane or a multi-layer plane in the tower body, the flowing heat exchange of the cooling liquid in the tower body can be effectively increased through the extension of the whole length of the pipeline, fresh cooling liquid is continuously supplemented into an inlet, the cooling liquid after heat exchange is discharged through an outlet, and a better cooling effect in the tower is constantly kept. And can all set up this kind of inside refrigerated heat transfer structure in a plurality of positions of the not co-altitude department of tower body according to actual demand in this embodiment, carry out multistage heat transfer, can effectively guarantee that the temperature of co-altitude medium is unanimous, promoted holistic tower body temperature stability, improve the absorption efficiency who washes the ammonia tower.
In the embodiment, the heat exchanger in the tower is adopted to directly cool and exchange heat for the washing liquid, compared with the traditional mode, the semi-ammonia-rich water pump 108, the semi-ammonia-rich water heat exchanger 109, connecting pipelines and the like are reduced, trays for collecting externally tangent washing liquid are reduced, the liquid redistributor 204 is used for replacing the trays, and the process flow is simplified; and secondly, the process that the washing liquid is led out from the lateral line of the middle part of the tower to be cooled and then is pumped to the lower ammonia washing section is eliminated, meanwhile, the contact area of the washing liquid and the outside is reduced, and the energy consumed by conveying fluid media is greatly reduced.
The ammonia system is washed to compound of this embodiment, can high-efficient timely reduction because of the exothermic absorption liquid temperature rising problem that leads to of ammonia absorption process, when reducing pipeline length, equipment quantity, overcome must collect the difficult point of heat transfer medium in tray department, effectively guarantee the whole temperature stability of tower through multi-stage distribution to strengthen the tower body absorption effect, reduce the washing liquid and cut out the cooling and send back the interior consumed energy of tower, simplify and wash ammonia process flow.
Example 2
The basic structure of the multi-stage composite ammonia scrubbing system in this embodiment is the same as that in embodiment 1, and further, in this embodiment, a liquid phase temperature measuring point 203 is disposed below the internal heat exchange circulation pipe 200, and the liquid phase temperature measuring point 203 and the control valve 202 are controlled in an interlocking manner, and the liquid phase temperature measuring point 203 is used for detecting the temperature of the absorption liquid below.
In this embodiment, a liquid enrichment unit 201 is disposed below the internal heat exchange circulation pipe 200, and a liquid phase temperature measuring point 203 extends into the liquid enrichment unit 201 to fully contact with the liquid phase. Specifically, an enrichment cavity for enriching a liquid phase is arranged in the liquid enrichment unit 201, the top of the enrichment cavity is an opening, a circulation hole is formed in the bottom of the enrichment cavity, the size of the circulation hole is smaller than that of the opening in the top of the enrichment cavity, and it can be guaranteed that a sufficient liquid phase is always collected in the liquid enrichment unit 201, so that it is guaranteed that the liquid phase temperature measuring point 203 can be in full contact with the collected liquid phase to affect the measurement accuracy.
The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.
Claims (7)
1. The utility model provides an ammonia system is washed to multistage compound of internal cooling of tower, sets up multilayer packing layer (101) including washing ammonia tower body (100) in washing ammonia tower body (100), is divided into in the tower body and washes ammonia section and alkali wash section, its characterized in that: a liquid redistributor (204) is arranged between the packing layers (101), an internal heat exchange circulating pipe (200) is arranged between the packing layers (101) and the liquid redistributor (204), the inlet and the outlet of the internal heat exchange circulating pipe (200) are both arranged outside the ammonia washing tower body (100), and cooling liquid enters the ammonia washing tower body (100) from the inlet and is finally discharged from the outlet of the internal heat exchange circulating pipe (200) after flowing heat exchange.
2. The in-tower cooling multistage composite ammonia scrubbing system according to claim 1, wherein: a control valve (202) is arranged on the water inlet of the internal heat exchange circulating pipe (200).
3. The in-tower cooling multistage composite ammonia scrubbing system according to claim 2, wherein: a liquid phase temperature measuring point (203) is arranged below the internal heat exchange circulating pipe (200).
4. The in-tower cooling multistage composite ammonia scrubbing system according to claim 3, wherein: the liquid phase temperature measuring point (203) is controlled in an interlocking way with the control valve (202).
5. The in-tower cooling multistage composite ammonia scrubbing system according to claim 3, wherein: a liquid enrichment unit (201) is arranged below the internal heat exchange circulating pipe (200), and a liquid phase temperature measuring point (203) extends into the liquid enrichment unit (201) to be fully contacted with a liquid phase.
6. The in-tower cooling multistage composite ammonia scrubbing system according to claim 5, wherein: an enrichment cavity for enriching a liquid phase is arranged in the liquid enrichment unit (201), the top of the enrichment cavity is an opening, a circulation hole is formed in the bottom of the enrichment cavity, and the size of the circulation hole is smaller than that of the opening in the top of the enrichment cavity.
7. The in-tower cooled multistage composite ammonia scrubbing system according to any one of claims 1 to 6, wherein: the internal heat exchange circulating pipe (200) is a tube type heat exchanger, and the inlet and the outlet of the cooling liquid of the internal heat exchange circulating pipe extend out of the ammonia washing tower body (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921803034.9U CN210736672U (en) | 2019-10-24 | 2019-10-24 | Multistage composite ammonia washing system for tower internal cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921803034.9U CN210736672U (en) | 2019-10-24 | 2019-10-24 | Multistage composite ammonia washing system for tower internal cooling |
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| Publication Number | Publication Date |
|---|---|
| CN210736672U true CN210736672U (en) | 2020-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921803034.9U Active CN210736672U (en) | 2019-10-24 | 2019-10-24 | Multistage composite ammonia washing system for tower internal cooling |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324431A (en) * | 2021-05-31 | 2021-08-31 | 山东金太阳设备制造有限公司 | Plate-type gas cooler |
| CN115612531A (en) * | 2022-12-16 | 2023-01-17 | 天津市创举科技股份有限公司 | Process and equipment for recovering ammonia from coke oven gas |
-
2019
- 2019-10-24 CN CN201921803034.9U patent/CN210736672U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324431A (en) * | 2021-05-31 | 2021-08-31 | 山东金太阳设备制造有限公司 | Plate-type gas cooler |
| CN115612531A (en) * | 2022-12-16 | 2023-01-17 | 天津市创举科技股份有限公司 | Process and equipment for recovering ammonia from coke oven gas |
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