CN211420048U - Coke oven riser waste heat recovery steam-water complex loop system - Google Patents
Coke oven riser waste heat recovery steam-water complex loop system Download PDFInfo
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- CN211420048U CN211420048U CN201921869277.2U CN201921869277U CN211420048U CN 211420048 U CN211420048 U CN 211420048U CN 201921869277 U CN201921869277 U CN 201921869277U CN 211420048 U CN211420048 U CN 211420048U
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Abstract
The utility model belongs to the technical field of coke oven riser waste heat utilization, especially, relate to a complex return circuit system of coke oven riser waste heat recovery soda. The desalting water tank is connected with the deaerator through a pipeline, the deaerator water feeding pump is installed on the pipeline connected with the deaerator, the desalting water tank is connected with the steam pocket through a pipeline, and the steam pocket water feeding pump is installed on the pipeline connected with the steam pocket; the first group of ascending pipe heat exchangers and the second group of ascending pipe heat exchangers are connected in parallel and then are connected with an outlet of a steam drum through a main water inlet pipe, a forced circulation pump is installed on a pipeline where the ascending pipe heat exchangers are connected with the steam drum, the first group of ascending pipe heat exchangers are connected with an inlet of the steam drum through a main first main steam water pipe, and the second group of ascending pipe heat exchangers are connected with the inlet of the steam drum through a main second main steam water pipe. The sensible heat of the raw gas can be fully utilized, and stable and high-yield steam can be obtained.
Description
Technical Field
The utility model belongs to the technical field of coke oven riser waste heat utilization, especially, relate to a complex return circuit system of coke oven riser waste heat recovery soda.
Background
In recent years, under the large background of protecting ecological environment, the coke oven riser waste heat utilization technology is more and more emphasized, one of the reasons that the coke oven riser waste heat utilization is not utilized on a large scale is that because the technology is unstable in steam generation, some riser heat exchangers generate more steam, some riser heat exchangers generate less steam, and the riser heat exchangers exchange more heat, because too much heat is taken away, the phenomenon that coking oil and the like on the inner wall of the riser heat exchanger are caused due to too low temperature of crude gas outlet is generated, and the phenomenon is finally the hydraulic imbalance of a steam-water system.
There are many furnace top riser heat exchangers of coke oven riser waste heat recovery systems, for example: 62 ascending pipe heat exchangers are arranged in the 62-hole tamping coke oven, the hydraulic balance is very complex, if a steam-water simple loop is adopted, serious phenomena such as hydraulic imbalance and the like are easily caused, the whole system can be operated unstably, and the popularization of the utilization of the waste heat of the ascending pipes is restricted.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model provides a complex loop system for recovering the waste heat of the ascension pipe of the coke oven with the steam and the water, which can make full use of the sensible heat of the raw gas and obtain stable and high-yield steam.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a complex loop system for recovering steam and water by waste heat of an ascending pipe of a coke oven comprises a first group of ascending pipe heat exchangers, a second group of ascending heat exchangers, a steam drum, a forced circulation pump, a deaerator, a steam drum water feed pump, a deaerating water feed pump and a demineralized water tank; the desalting water tank is connected with the deaerator through a pipeline, the deaerator water feeding pump is installed on the pipeline connected with the deaerator, the desalting water tank is connected with the steam pocket through a pipeline, and the steam pocket water feeding pump is installed on the pipeline connected with the steam pocket; the first group of ascending pipe heat exchangers and the second group of ascending pipe heat exchangers are connected in parallel and then are connected with an outlet of a steam drum through a main water inlet pipe, a forced circulation pump is installed on a pipeline where the ascending pipe heat exchangers are connected with the steam drum, the first group of ascending pipe heat exchangers are connected with an inlet of the steam drum through a main first main steam water pipe, and the second group of ascending pipe heat exchangers are connected with the inlet of the steam drum through a main second main steam water pipe.
The first group of riser heat exchangers is formed by connecting 5 vertical pipe sleeve type riser heat exchangers in parallel, and the second group of riser heat exchangers is formed by connecting 5 vertical pipe sleeve type riser heat exchangers in parallel; the coke oven ascending pipes are arranged in groups, 5 coke oven ascending pipes are arranged in one group and are divided into even groups, a single main pipe system with the water inlet from the middle and the water outlet from the two sides is adopted for water inlet, and a double main pipe system with the steam outlet from one side and the concurrent flow convergence is adopted for steam outlet.
The deaerator adopts an atmospheric deaerator or a low-pressure rotary film deaerator.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses being divided into two whole coke oven tedge waste heat recovery system, adopting the complicated loop system of soda, arranging coke oven tedge block, 5 are a set of, divide into even group altogether, and the single female pipe system of intaking, both sides play from "middle, goes out the steam and adopts" one side play, following current to converge "two female pipe systems, increases the hydraulic balance nature of system, improves system ton burnt steam production rate and comprehensive energy utilization.
Drawings
FIG. 1 is a schematic diagram of the structure and a process flow diagram of the present invention.
In the figure: 1-riser double-pipe type coke oven ascending pipe heat exchanger (20 ascending pipe heat exchangers are taken as an example for explanation) 2-steam pocket 3-forced circulation pump 4-deaerator 5-steam pocket water feed pump 6-deaerating water feed pump 7-demineralized water tank 8-main water inlet main pipe 9-first main steam water main pipe 10-second main steam water main pipe
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
a complex steam-water loop system for recovering waste heat of a rising pipe of a coke oven comprises a first group of rising pipe heat exchangers, a second group of rising heat exchangers, a steam drum 2, a forced circulation pump 3, a deaerator 4, a steam drum water feed pump 5, a deaerating water feed pump 6 and a demineralized water tank 7. The first group of riser heat exchangers is formed by connecting 5 vertical pipe-in-pipe riser heat exchangers 1 in parallel, and the second group of riser heat exchangers is formed by connecting 5 vertical pipe-in-pipe riser heat exchangers 1 in parallel.
The desalting water tank 7 is connected with the deaerator 4 through a pipeline, the deaerating water feed pump 6 is installed on the pipeline connecting the desalting water tank 7 with the deaerator 4, the desalting water tank 7 is connected with the steam pocket 2 through a pipeline, and the steam pocket water feed pump 5 is installed on the pipeline connecting the desalting water tank 7 with the steam pocket 1; the first group of ascending pipe heat exchangers and the second group of ascending pipe heat exchangers are connected in parallel and then connected with an outlet of the steam drum 2 through a main water inlet pipe 8, the forced circulation pump 3 is installed on a pipeline connected with the steam drum 2 through the ascending heat exchangers, the first group of ascending pipe heat exchangers are connected with an inlet of the steam drum 2 through a main first main steam water pipe 9, and the second group of ascending pipe heat exchangers are connected with an inlet of the steam drum 2 through a main second main steam water pipe 10.
The deaerator adopts an atmospheric deaerator or a low-pressure rotary film deaerator, and the temperature of deaerated water after deaerating is 104 ℃.
Each coke oven is divided into even groups, taking 60-hole coke ovens as an example, the coke ovens can be divided into 12 groups, and each group has 5 ascending pipes; if the number of riser holes is not a multiple of 5, for example 62 holes, it can be divided into 12 groups of 2 groups of 6 risers and the remaining 10 groups of 5 risers.
Boiler water of the steam drum 2 passes through a forced circulation pump 3 to form 1 main water inlet pipe 8, each coke oven comprises 1 main water inlet pipe 8, the main water inlet pipes are divided into all groups of ascending pipe main pipes from the middle of the main water inlet pipe 8, and then the middle of each group of ascending pipe main pipes is connected to all ascending pipe heat exchangers.
Circulating water and raw coke oven gas generate a steam-water mixture after heat exchange, every 5 ascending pipes are converged into each group of steam-water main pipes in a downstream manner at one side, each group of steam-water main pipes are connected to one main steam-water pipe from one side, and one coke oven comprises 2 main steam-water pipes. The steam-water main pipe is connected to the steam drum, and steam is generated through steam-water separation and sent to the outer net.
The utility model discloses a working process specifically includes following step:
(1) the outer net demineralized water gets into demineralized water tank 7, through deoxidization feed water pump 6, gets into deaerator 4 and carries out the deoxidization, and the heating steam source is steam system, and the deoxidization water is through steam pocket feed water pump 5, send to steam pocket 2.
(2) The riser heat exchanger 1 of the riser-pipe type coke oven has 20 holes in total, and 5 risers are grouped into 4 groups: the number of the holes is 1-5, the number of the holes is 6-10, the number of the holes is 11-15, and the number of the holes is 16-20.
(3) The circulating water system adopts a single main pipe system with a middle inlet and two side outlets. The water in the steam drum 2 passes through a forced circulation pump 3 to form 1 main water inlet pipe, each coke oven comprises 1 main water inlet pipe, and each group of ascending pipe main pipes are divided from the middle of the main water inlet pipe to the middle of each group of ascending pipe main pipes and then connected to each ascending pipe heat exchanger 1 of the vertical pipe double-pipe coke oven.
(4) Each riser pipe sleeve type coke oven riser pipe heat exchanger 1 generates steam-water mixture, and the steam-water mixture adopts a double main pipe system with one side outlet and concurrent flow convergence. Circulating water and raw coke oven gas generate a steam-water mixture after heat exchange, every 5 ascending pipes are converged into each group of steam-water main pipes in a downstream manner at one side, each group of steam-water main pipes are connected to one main steam-water pipe from one side, and one coke oven comprises 2 main steam-water pipes. The steam-water main pipe is connected to the steam drum 2, and steam is generated through steam-water separation and is sent to the outer net pipeline for utilization.
The utility model discloses being divided into two whole coke oven tedge waste heat recovery system, adopting the complicated loop system of soda, arranging coke oven tedge block, 5 are a set of, divide into even group altogether, and the single female pipe system of intaking, both sides play from "middle, goes out the steam and adopts" one side play, following current to converge "two female pipe systems, increases the hydraulic balance nature of system, improves system ton burnt steam production rate and comprehensive energy utilization.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (4)
1. A complex loop system for recovering waste heat of a rising pipe of a coke oven and recycling steam and water is characterized by comprising a first group of rising pipe heat exchangers, a second group of rising heat exchangers, a steam pocket, a forced circulation pump, a deaerator, a steam pocket water feeding pump, a deaerating water feeding pump and a demineralized water tank; the desalting water tank is connected with the deaerator through a pipeline, the deaerator water feeding pump is installed on the pipeline connected with the deaerator, the desalting water tank is connected with the steam pocket through a pipeline, and the steam pocket water feeding pump is installed on the pipeline connected with the steam pocket; the first group of ascending pipe heat exchangers and the second group of ascending pipe heat exchangers are connected in parallel and then are connected with an outlet of a steam drum through a main water inlet pipe, a forced circulation pump is installed on a pipeline where the ascending pipe heat exchangers are connected with the steam drum, the first group of ascending pipe heat exchangers are connected with an inlet of the steam drum through a main first main steam water pipe, and the second group of ascending pipe heat exchangers are connected with the inlet of the steam drum through a main second main steam water pipe.
2. The coke oven riser waste heat recovery steam-water complex loop system of claim 1, wherein the first group of riser heat exchangers is formed by connecting a plurality of riser-in-tube riser heat exchangers in parallel, and the second group of riser heat exchangers is formed by connecting a plurality of riser-in-tube riser heat exchangers in parallel.
3. The coke oven riser waste heat recovery steam-water complex loop system as claimed in claim 2, wherein the first group of riser heat exchangers is formed by connecting 5 riser-pipe type riser heat exchangers in parallel, and the second group of riser heat exchangers is formed by connecting 5 riser-pipe type riser heat exchangers in parallel; the coke oven ascending pipes are arranged in groups, 5 coke oven ascending pipes are arranged in one group and are divided into even groups, a single main pipe system with the water inlet from the middle and the water outlet from the two sides is adopted for water inlet, and a double main pipe system with the steam outlet from one side and the concurrent flow convergence is adopted for steam outlet.
4. The coke oven riser waste heat recovery steam-water complex loop system of claim 1, wherein the deaerator is an atmospheric deaerator or a low-pressure rotary film deaerator.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110699093A (en) * | 2019-11-01 | 2020-01-17 | 中冶焦耐(大连)工程技术有限公司 | Coke oven riser waste heat recovery steam-water complex loop system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110699093A (en) * | 2019-11-01 | 2020-01-17 | 中冶焦耐(大连)工程技术有限公司 | Coke oven riser waste heat recovery steam-water complex loop system and method |
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