CN220745457U - Gasification black water waste heat recovery system - Google Patents
Gasification black water waste heat recovery system Download PDFInfo
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- CN220745457U CN220745457U CN202322121505.0U CN202322121505U CN220745457U CN 220745457 U CN220745457 U CN 220745457U CN 202322121505 U CN202322121505 U CN 202322121505U CN 220745457 U CN220745457 U CN 220745457U
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- pipeline
- black water
- valve
- heat exchanger
- primary side
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- 239000010866 blackwater Substances 0.000 title claims abstract description 116
- 238000011084 recovery Methods 0.000 title claims abstract description 21
- 239000002918 waste heat Substances 0.000 title claims abstract description 20
- 238000002309 gasification Methods 0.000 title claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000007791 liquid phase Substances 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 239000010797 grey water Substances 0.000 claims description 3
- 238000007701 flash-distillation Methods 0.000 claims 5
- 230000008676 import Effects 0.000 claims 1
- 238000001704 evaporation Methods 0.000 abstract description 19
- 230000008020 evaporation Effects 0.000 abstract description 19
- 238000000926 separation method Methods 0.000 abstract description 14
- 238000004062 sedimentation Methods 0.000 abstract description 5
- 239000003245 coal Substances 0.000 abstract description 4
- 239000000498 cooling water Substances 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model relates to a gasified black water waste heat recovery system which comprises a high-pressure flash evaporation separation tank, a low-pressure flash evaporation separation tank, a first vacuum flash evaporation tank, a second vacuum flash evaporation tank, a sedimentation tank and an ash water tank, wherein a liquid phase outlet of the low-pressure flash evaporation separation tank is connected with a first pipeline, the first pipeline is connected with a black water heat exchanger, a black water outlet of the black water heat exchanger is connected with a return pipe, the return pipe is connected with the sedimentation tank, the black water heat exchanger is connected with a second pipeline and a third pipeline, a primary side circulating pump is arranged on the second pipeline, the other end of the second pipeline is connected with a secondary side plate heat exchanger, and the secondary side plate heat exchanger is connected with the third pipeline. According to the utility model, the liquid phase of the low-pressure flash separation tank is directly sent to the black water waste heat recovery system for waste heat recovery and utilization, and the black water with recovered heat is directly returned to the settling tank for treatment without cooling the circulating water. The waste heat recovery application not only effectively utilizes a large amount of heat sources, but also saves a large amount of circulating cooling water. Saving the consumption of coal.
Description
Technical Field
The utility model belongs to the technical field of heat energy recovery, and particularly relates to a gasification black water waste heat recovery system.
Background
The black water discharged from the chilling tank and the wet scrubber of the existing gasifier is required to be cooled and heat recovered by a flash evaporation system. The flash evaporation system is divided into three stages of flash evaporation of high pressure, low pressure and vacuum, and black water is reduced to below 60 ℃. If the temperature of the black water discharged into the settling tank is too high, the flocculation effect of the flocculant is affected, so that the quality of the gray water is affected, and the operation of the coal gasification device is affected. In order to ensure the black water temperature of the flash evaporation system, a large amount of circulating cooling water is needed, so that the production cost is increased; a large amount of black water is subjected to heat exchange and temperature reduction through a cooler, so that low-level heat of the black water is wasted.
Disclosure of Invention
The utility model aims to provide a gasified black water waste heat recovery system, which solves the problems that the existing system uses a large amount of circulating cooling water and increases the production cost; a large amount of black water is subjected to heat exchange and temperature reduction through a cooler, so that the problem of low-level heat waste of the black water is solved.
The utility model relates to a gasified black water waste heat recovery system which comprises a high-pressure flash evaporation separation tank, a low-pressure flash evaporation separation tank, a first vacuum flash evaporation tank, a second vacuum flash evaporation tank, a sedimentation tank and an ash water tank, wherein a liquid phase outlet of the low-pressure flash evaporation separation tank is connected with a first pipeline, the first pipeline is connected with a black water heat exchanger, a black water outlet of the black water heat exchanger is connected with a return pipe, the return pipe is connected with the sedimentation tank, a primary side water inlet and outlet of the black water heat exchanger are respectively connected with a second pipeline and a third pipeline, a primary side circulating pump is arranged on the second pipeline, the other end of the second pipeline is connected with a secondary side plate heat exchanger, a primary side water inlet of the secondary side plate heat exchanger is connected with the third pipeline, a sewage drain pipe is arranged at the bottom of the black water heat exchanger, and the other end of the sewage pipe is connected with the sedimentation tank.
As one preferable mode, a real-time water quality detector is arranged between the primary side circulating pump and the secondary side plate type heat exchanger, water quality is monitored in real time, and an inlet of the primary side circulating pump is connected with a high-level water tank. And water is supplemented in time, and meanwhile, the problem of thermal expansion caused by too fast temperature rise and large temperature difference of circulating water of the system is solved.
As a preference, a black water regulating valve and a black water cut-off valve A are arranged on a first pipeline, a fourth pipeline and a fifth pipeline are respectively connected to a first pipeline of an inlet and an outlet of the black water cut-off valve A, a black water cut-off valve D is arranged on a return pipe, a black water cut-off valve B and a black water cut-off valve C are respectively arranged on the fourth pipeline and the fifth pipeline, the other end of the fourth pipeline is connected to a return pipe of an inlet end of the black water cut-off valve D, and the other end of the fifth pipeline is connected to a return pipe of an outlet end of the black water cut-off valve D. The back washing can be carried out on the black water side of the black water heat exchanger to wash out impurities.
As one preferable mode, a primary side cut-off valve A and a primary side regulating valve are arranged on a pipeline II, a pipeline six and a pipeline seven are respectively connected to a pipeline II of an inlet and an outlet of the primary side cut-off valve A, a primary side cut-off valve D is arranged on a pipeline III, the other end of the pipeline six is connected with a pipeline III of an inlet end of the primary side cut-off valve D, the other end of the pipeline seven is connected with a pipeline III of an outlet end of the primary side cut-off valve D, and a primary side cut-off valve C and a primary side cut-off valve are respectively arranged on the pipeline six and the pipeline seven. The primary side water side of the black water heat exchanger can be backwashed to wash out impurities.
Preferably, the black water heat exchanger is an efficient wide-channel all-welded plate heat exchanger.
Preferably, the secondary side plate heat exchanger is a removable plate heat exchanger.
Compared with the prior art, the utility model has the advantages that:
the liquid phase of the low-pressure flash separation tank is directly sent to the black water waste heat recovery system for waste heat recovery and utilization, and the black water with recovered heat is directly returned to the settling tank for treatment without cooling the circulating water. The waste heat recovery application not only effectively utilizes a large amount of heat sources, but also saves a large amount of circulating cooling water. Saving the consumption of coal and having good economic and social benefits.
Drawings
FIG. 1 is a schematic diagram of the present utility model;
in the figure: 1. black water regulating valves 2, black water shut-off valves A and 3, black water shut-off valves B and 4, black water shut-off valves C and 5, black water shut-off valves D and 6, black water heat exchangers, 7, blow-down valves, 8, blow-down pumps and 9, primary side shut-off valves A and 10, primary side regulating valves, 11, primary side circulating pumps, 12, primary side shut-off valves B and 13, primary side shut-off valves C and 14, primary side shut-off valves D and 15, a real-time water quality detector, 16, a secondary side plate heat exchanger, 17, a high-level water tank, 18, an ash water tank, 19, a settling tank, 20, a second vacuum flash tank, 21, a first vacuum flash tank, 22, a low-pressure flash separation tank, 23 and a high-pressure flash separation tank.
Detailed Description
The following detailed description of the utility model refers to the accompanying drawings.
In embodiment 1, as shown in fig. 1, the utility model is a gasification black water waste heat recovery system, which comprises a high-pressure flash evaporation separation tank 23, a low-pressure flash evaporation separation tank 22, a first vacuum flash evaporation tank 21, a second vacuum flash evaporation tank 20, a settling tank 19 and a grey water tank 18, wherein a liquid phase outlet of the low-pressure flash evaporation separation tank 22 is connected with a pipeline I, the pipeline I is connected with a black water heat exchanger 6, a black water outlet of the black water heat exchanger 6 is connected with a return pipe, the return pipe is connected with the settling tank 19, a primary side water inlet and outlet of the black water heat exchanger 6 is respectively connected with a pipeline II and a pipeline III, a primary side circulating pump 11 is arranged on the pipeline II, the other end of the pipeline II is connected with a secondary side plate heat exchanger 16, a primary side water inlet of the secondary side plate heat exchanger 16 is connected with a sewage drain pipe III, the bottom of the black water heat exchanger 6 is provided with a sewage pump 8, and the other end of the sewage pipe is connected with the settling tank 19.
A real-time water quality detector 15 is arranged between the primary side circulating pump 11 and the secondary side plate heat exchanger 16, and an inlet of the primary side circulating pump 11 is connected with a high-level water tank 17.
When the black water waste heat recovery system works normally, black water from the low-pressure flash separation tank 22 flows into the black water heat exchanger 6, and then flows back to the settling tank 19 for treatment through a black water outlet of the black water heat exchanger 6 through a return pipe. In the process, the black water releases heat to heat the primary side water entering the black water heat exchanger 6, the primary side water flows through the primary side circulating pump 11, the second pipeline, the black water heat exchanger 6 and the third pipeline and then flows back to the secondary side plate heat exchanger 16, and the primary side water passes through the real-time water quality detector 15 and is periodically supplemented with water through the high-level water tank 17. The primary side water absorbs heat and then goes to the secondary side plate heat exchanger 16 to heat heating water or desalted water with pressure of more than 10 kg. Because the black water medium has the characteristics of high suspended matters, high temperature, high alkali, high hardness and the like, contains strong corrosive media such as ammonia, chloride ions, hydrogen sulfide, phosphoric acid and the like, and also contains solid particles with high hardness generated by gasification reaction, the black water side is periodically discharged during operation, the sewage pump 8 is periodically opened for sewage discharge, and sewage black water flows into the settling tank 19.
The gasified black water comprises gasified black water for preparing synthetic ammonia by gasifying coal slurry under pressure, and gasified black water of a novel five-ring furnace dry pulverized coal pressurized gasifier and gasified black water of a space furnace.
In embodiment 2, on the basis of embodiment 1, a black water regulating valve 1 and a black water cut-off valve A2 are arranged on a first pipeline, a fourth pipeline and a fifth pipeline are respectively connected to a first pipeline at the inlet and the outlet of the black water cut-off valve A2, a black water cut-off valve D5 is arranged on a return pipe, a black water cut-off valve B3 and a black water cut-off valve C4 are respectively arranged on the fourth pipeline and the fifth pipeline, the other end of the fourth pipeline is connected to a return pipe at the inlet end of the black water cut-off valve D5, and the other end of the fifth pipeline is connected to a return pipe at the outlet end of the black water cut-off valve D5.
The pipeline II is provided with a primary side cut-off valve A9 and a primary side regulating valve 10, the pipeline II at the inlet and outlet of the primary side cut-off valve A9 is respectively connected with a pipeline six and a pipeline seven, the pipeline III is provided with a primary side cut-off valve D14, the other end of the pipeline six is connected with a pipeline III at the inlet end of the primary side cut-off valve D14, the other end of the pipeline seven is connected with a pipeline III at the outlet end of the primary side cut-off valve D14, and the pipeline six and the pipeline seven are respectively provided with a primary side cut-off valve C13 and a primary side cut-off valve B12.
The black water heat exchanger 6 is an efficient wide-channel all-welded plate heat exchanger, and a drain valve 7 is arranged on a drain pipe.
The secondary side plate heat exchanger 16 is a removable plate heat exchanger.
During normal operation, the black water flows into the black water heat exchanger 6 through the black water regulating valve 1 to the black water shut-off valve A2 (the black water shut-off valve B3 and the black water shut-off valve C4 are closed), and flows into the settling tank 19 for treatment through the black water shut-off valve D5. The primary water flows back to the secondary-side plate heat exchanger 16 through the primary-side circulation pump 11, the primary-side regulator valve 10, the primary-side cut-off valve A9 (primary-side cut-off valve B12 and primary-side cut-off valve C13 are closed), the black water heat exchanger 6, and the primary cut-off valve D14. During back flushing, the black water flows into the black water heat exchanger 6 through the black water regulating valve 1 to the black water shut-off valve B12 (the black water shut-off valve A9 and the black water shut-off valve D14 are closed), and flows into the settling tank 19 through the black water shut-off valve C13 for treatment. The primary water flows back to the secondary-side plate heat exchanger 16 through the primary-side circulation pump 11, the primary-side regulator valve 10, the primary-side cut-off valve C13 (primary-side cut-off valve A9 and primary-side cut-off valve D14 are closed), the black water heat exchanger 6, and the primary cut-off valve B12.
The black water cut-off valve A2, the black water cut-off valve B3, the black water cut-off valve C4, the black water cut-off valve D5, the primary side cut-off valve A9, the primary side cut-off valve B12, the primary side cut-off valve C13 and the primary side cut-off valve D14 comprise two parallel circuits, wherein one circuit is provided with a manual valve, and the other circuit is provided with two manual valves and an electric valve. The black water regulating valve 1 and the primary side regulating valve 10 comprise two parallel circuits, wherein one circuit is provided with a manual valve, and the other circuit is provided with two manual valves and an electric regulating valve.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art. The technical scheme of the utility model can also provide a solution which is obviously different from the prior art aiming at the technical problem that the prior art solution is too single.
In the description of the present utility model, the terms "inner", "outer", "longitudinal", "transverse", "upper", "lower", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, only for convenience in describing the present utility model, and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Claims (6)
1. The utility model provides a gasification black water waste heat recovery system, includes high pressure flash distillation knockout drum (23), low pressure flash distillation knockout drum (22), first vacuum flash distillation drum (21), second vacuum flash distillation drum (20), settling tank (19) and grey water groove (18), its characterized in that: the liquid phase outlet of low pressure flash distillation knockout drum (22) is connected with pipeline one, pipeline one is connected with black water heat exchanger (6), black water outlet connection of black water heat exchanger (6) has the back flow, back flow connection subsider (19), primary side water inlet and outlet of black water heat exchanger (6) are connected with pipeline two and pipeline three respectively, be equipped with primary side circulating pump (11) on the pipeline two, the pipeline two other end is connected with secondary side plate heat exchanger (16), primary side water inlet connection pipeline three of secondary side plate heat exchanger (16), the bottom of black water heat exchanger (6) is equipped with the blow off pipe, be equipped with blow off pump (8) on the blow off pipe, the subsider (19) are connected to the blow off pipe other end.
2. The gasification black water waste heat recovery system according to claim 1, wherein: a real-time water quality detector (15) is arranged between the primary side circulating pump (11) and the secondary side plate type heat exchanger (16), and an inlet of the primary side circulating pump (11) is connected with a high-level water tank (17).
3. The gasification black water waste heat recovery system according to claim 1 or 2, wherein: a black water regulating valve (1) and a black water cut-off valve A (2) are arranged on a first pipeline, a fourth pipeline and a fifth pipeline are respectively connected to the first pipeline at the inlet and the outlet of the black water cut-off valve A (2), a black water cut-off valve D (5) is arranged on a return pipe, a black water cut-off valve B (3) and a black water cut-off valve C (4) are respectively arranged on the fourth pipeline and the fifth pipeline, the other end of the fourth pipeline is connected to the return pipe at the inlet end of the black water cut-off valve D (5), and the other end of the fifth pipeline is connected to the return pipe at the outlet end of the black water cut-off valve D (5).
4. A gasification black water waste heat recovery system according to claim 3 wherein: be equipped with primary side trip valve A (9) and primary side governing valve (10) on the pipeline II, be connected with pipeline six and pipeline seven on the pipeline II of primary side trip valve A (9) import and export respectively, be equipped with primary side trip valve D (14) on the pipeline III, pipeline six other end is connected with pipeline three of primary side trip valve D (14) entrance point, pipeline seven other end is connected with pipeline three of primary side trip valve D (14) exit end, is equipped with primary side trip valve C (13) and primary side trip valve B (12) on pipeline six and the pipeline seven respectively.
5. The gasification black water waste heat recovery system according to claim 1, wherein: the black water heat exchanger (6) is an efficient wide-channel all-welded plate heat exchanger, and a drain valve (7) is arranged on a drain pipe.
6. The gasification black water waste heat recovery system according to claim 2, wherein: the secondary side plate type heat exchanger (16) is a detachable plate type heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322121505.0U CN220745457U (en) | 2023-08-08 | 2023-08-08 | Gasification black water waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322121505.0U CN220745457U (en) | 2023-08-08 | 2023-08-08 | Gasification black water waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220745457U true CN220745457U (en) | 2024-04-09 |
Family
ID=90564258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322121505.0U Active CN220745457U (en) | 2023-08-08 | 2023-08-08 | Gasification black water waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220745457U (en) |
-
2023
- 2023-08-08 CN CN202322121505.0U patent/CN220745457U/en active Active
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