CN117323799A - Desulfurization and denitration flue gas system and process water reflux method thereof - Google Patents
Desulfurization and denitration flue gas system and process water reflux method thereof Download PDFInfo
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- CN117323799A CN117323799A CN202311413008.6A CN202311413008A CN117323799A CN 117323799 A CN117323799 A CN 117323799A CN 202311413008 A CN202311413008 A CN 202311413008A CN 117323799 A CN117323799 A CN 117323799A
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- water
- process water
- flushing
- mechanical seal
- industrial
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 283
- 238000000034 method Methods 0.000 title claims abstract description 202
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 37
- 230000023556 desulfurization Effects 0.000 title claims abstract description 37
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000003546 flue gas Substances 0.000 title claims abstract description 33
- 238000010992 reflux Methods 0.000 title abstract description 9
- 239000008235 industrial water Substances 0.000 claims abstract description 91
- 238000001816 cooling Methods 0.000 claims abstract description 76
- 238000011010 flushing procedure Methods 0.000 claims description 69
- 238000004064 recycling Methods 0.000 claims description 20
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims 8
- 229910052717 sulfur Inorganic materials 0.000 claims 8
- 239000011593 sulfur Substances 0.000 claims 8
- 239000002002 slurry Substances 0.000 abstract description 20
- 239000000498 cooling water Substances 0.000 description 23
- 239000007788 liquid Substances 0.000 description 10
- 238000012423 maintenance Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000013589 supplement Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a desulfurization and denitration flue gas system and a process water reflux method thereof, and relates to the technical field of desulfurization and denitration. The process water in the process water tank can be led to the mechanical seal cooling unit through the process water backflow standby pipeline, and when the industrial water is difficult to meet the requirement of the mechanical seal cooling unit, the mechanical seal of the slurry pump can be cooled by the process water.
Description
Technical Field
The invention relates to the technical field of desulfurization and denitrification, in particular to a desulfurization and denitrification flue gas system and a process water backflow method thereof.
Background
The coke oven flue gas must be treated by a desulfurization and denitrification device and then discharged after reaching standards, and a desulfurization slurry pump and a lime slurry pump are arranged in a desulfurization system pulping system, and the two pumps are traditional centrifugal pumps. The centrifugal pump mechanical seal structure comprises a movable ring, a stationary ring, an impeller and an impeller shaft with the impeller, wherein the movable ring and the stationary ring are both arranged on the shaft with the impeller. In order to prevent acid protection, a water washing type mechanical seal is adopted, meanwhile, washing water can take away temperature rise generated by friction at a mechanical seal position during operation, protection of a movable ring and a static ring is realized, and the service life of equipment is greatly prolonged.
At present, under the condition that the pressure, flow and the like of cooling water cannot reach the cooling dynamic ring and the static ring, the centrifugal pump is easy to cause mechanical seal burning loss. In addition, most of mechanical seal cooling at present adopts industrial water, the whole pipe network is only connected with and has only one water pipeline, and along with the increase of the service time of the pipe network, the pipeline is corroded and damaged, and each time the industrial water is stopped for maintenance, the desulfurization and denitrification system is stopped, and the operation is matched, but the flue gas emission exceeds the standard after the desulfurization and denitrification system is stopped; meanwhile, the industrial water delivery pump is stopped under unplanned conditions such as abnormal shutdown, and the machine sealing system is subjected to conditions such as burning loss, so that the stable operation of the whole desulfurization and denitrification system is severely restricted.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention is directed to a desulfurization and denitrification flue gas system and a process water backflow method thereof, which are used for solving the problem that only one water pipeline in the prior art is difficult to cope with the emergency situation in the operation process of the desulfurization and denitrification system.
To achieve the above and other related objects, the present invention provides a desulfurization and denitrification flue gas system, including an industrial water inlet manifold, a machine seal cooling unit and a flushing unit, wherein the machine seal cooling unit and the flushing unit are respectively connected with the industrial water inlet manifold, the flushing unit includes a process water tank, the process water tank and the machine seal cooling unit are connected through a process water backflow standby line, a process water recycling cut-off valve for opening or closing the process water backflow standby line is provided on the process water backflow standby line, and the process water backflow standby line has a first end connected with the machine seal cooling unit and a second end connected with the flushing unit.
Optionally, a process water return main pipe network cut-off valve is arranged on the industrial water inlet main pipe.
Optionally, the flushing unit includes a process water tank outlet pipe connected to the process water tank, a flushing water pump and a flushing water pump outlet valve are sequentially connected to the process water tank outlet pipe, a first end of the process water backflow standby pipeline is connected to the mechanical seal cooling unit, and a second end of the process water backflow standby pipeline is disposed between the flushing water pump and the flushing water pump outlet valve.
Optionally, the industrial water inlet header pipe is provided with a first water inlet for entering industrial water and a first water outlet for discharging water, the mechanical seal cooling unit and the flushing unit are respectively connected with the first water outlet, and the first end of the process water backflow standby pipeline is arranged between the first water outlet and the process water recycling cut-off valve.
Optionally, an industrial water pressure gauge is arranged at the joint of the mechanical seal cooling unit and the first outlet.
Optionally, a process water tank water replenishing valve is arranged at the joint of the flushing unit and the first outlet.
Optionally, two ends of the process water backflow standby pipeline are respectively provided with a process water recycling manual valve.
The invention provides a process water reflux method of a desulfurization and denitration flue gas system, which comprises the steps of:
monitoring the state of industrial water;
and cooling the mechanical seal cooling unit by using the process water in the process water tank based on the industrial water state.
Optionally, based on the industrial water status, cooling the mechanical seal cooling unit with the process water in the process water tank, including:
an industrial water pressure gauge is arranged at the joint of the mechanical seal cooling unit and the industrial water inlet main pipe;
and when the water pressure value of the industrial water at the inlet of the mechanical seal cooling unit is smaller than a preset value or the industrial water does not flow into the industrial water inlet main pipe, cooling the mechanical seal cooling unit by using the process water in the process water tank.
Optionally, cooling the mechanical seal cooling unit using process water in the process water tank includes:
a process water return main pipe network cut-off valve is arranged on the industrial water inlet main pipe;
the flushing unit comprises a process water tank water outlet pipe connected with the process water tank, a flushing water pump and a flushing water pump outlet valve are sequentially connected to the process water tank water outlet pipe, a first end of a process water backflow standby pipeline is connected with the mechanical seal cooling unit, and a second end of the process water backflow standby pipeline is arranged between the flushing water pump and the flushing water pump outlet valve;
and closing the process water return main pipeline shut-off valve, and opening the flushing water pump and the process water recycling shut-off valve.
As described above, the desulfurization and denitration flue gas system and the process water reflux method thereof have the following beneficial effects:
through the reserve pipeline of process water backward flow, can lead the process water in the process water tank to the mechanical seal cooling unit, when the industrial water network planning overhauls or the industrial water pressure that gets into the thick liquid pump is less than equipment protection value, usable process water cools off thick liquid pump mechanical seal, realize that process water carries out self-protection to the system, maintain the normal operating of SOx/NOx control system and the safety of thick liquid pump, the security of SOx/NOx control system during operation has been promoted, the damage risk of thick liquid pump under the different fault conditions of industrial water system has been reduced, reduce the maintenance number of times of equipment.
Drawings
FIG. 1 is a schematic diagram of a layout of a desulfurization and denitrification flue gas system according to an embodiment of the invention.
FIG. 2 is a schematic flow chart of a process water reflux method for a desulfurization and denitrification flue gas system according to an embodiment of the invention.
Description of the reference numerals: 1. an industrial water inlet main pipe; 2. an industrial water inlet main valve; 3. the process water returns to the main pipeline network cut-off valve; 4. the process water is recycled manually; 5. a process water reflux standby pipeline; 6. industrial water pressure gauge; 7. mechanically sealing a cooling water inlet valve; 8. a slurry pump; 9. mechanically sealing a cooling water outlet valve; 10. water supplementing valve of cooling water tower; 11. a cooling water tower; 12. a cooling water pump inlet valve; 13. a cooling water pump; 14. a cooling water pump outlet valve; 15. water replenishing valve of process water tank; 16. a process water tank; 17. a water outlet pipe of the process water tank; 18. a flushing water pump inlet valve; 19. a flushing water pump; 20. a rinse water pump outlet valve; 21. and the process water is recycled to be a shut-off valve.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
Please refer to fig. 1 and 2. It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present invention by way of illustration, and only the components related to the present invention are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex. The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the claims. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
As shown in fig. 1, the invention provides a desulfurization and denitration flue gas system, which comprises an industrial water inlet main pipe 1, a mechanical seal cooling unit and a flushing unit, wherein the mechanical seal cooling unit and the flushing unit are respectively connected with the industrial water inlet main pipe 1, the flushing unit comprises a process water tank 16, the process water tank 16 and the mechanical seal cooling unit are connected through a process water backflow standby pipeline 5, a process water recycling cut-off valve 21 for opening or closing the process water backflow standby pipeline 5 is arranged on the process water backflow standby pipeline 5, and the process water backflow standby pipeline 5 is provided with a first end connected with the mechanical seal cooling unit and a second end connected with the flushing unit. Through guiding the process water in the process water tank 16 to the mechanical seal cooling unit, when the industrial water pipe network is subjected to planned maintenance or the industrial water pressure entering the slurry pump 8 is lower than the equipment protection value, the mechanical seal of the slurry pump 8 can be cooled by the process water, so that the process water can realize self-protection of the system, the normal operation of the desulfurization and denitrification system and the safety of the slurry pump 8 are maintained, the safety of the desulfurization and denitrification system during operation is improved, the damage risk of the slurry pump 8 in different fault states of the industrial water system is reduced, and the maintenance times of equipment are reduced.
Wherein, the industrial water inlet main pipe 1 is provided with a process water return main pipe network cut-off valve 3. When the industrial water pipe network is subjected to planned maintenance or the industrial water pressure is lower than the equipment protection value, the process water in the process water tank 16 can be drained to the position of the slurry pump 8, and the process water return main pipe network cut-off valve 3 is closed during drainage, so that the process water in the process water tank 16 can be prevented from being reversely poured into the industrial water inlet main pipe 1 to cause the loss of the process water.
The flushing unit comprises a process water tank water outlet pipe 17 connected with a process water tank 16, a flushing water pump 19 and a flushing water pump outlet valve 20 are sequentially connected to the process water tank water outlet pipe 17, a first end of a process water backflow standby pipeline 5 is connected with the mechanical seal cooling unit, and a second end of the process water backflow standby pipeline 5 is arranged between the flushing water pump 19 and the flushing water pump outlet valve 20. The water in the process water tank 16 can be pumped out into the process water return backup line 5 by means of a flushing water pump 19 on the process water tank outlet pipe 17 and the slurry pump 8 is cooled by the process water in the process water tank 16. The original flushing water pump 19 in the desulfurization and denitration flue gas system is used, so that the modification cost of the desulfurization and denitration flue gas system can be reduced.
In detail, the industrial water inlet header pipe 1 has a first water inlet into industrial water and a first water outlet from which the industrial water flows, and the mechanical seal cooling unit and the flushing unit are respectively connected to the first water outlet, and a first end of the process water return standby line 5 is disposed between the first water outlet and the process water recycling cutoff valve 21. Because the pipeline at the joint of the mechanical seal cooling unit and the industrial water inlet main pipe 1 is thinner, the pipeline is difficult to be externally connected, and the first end of the process water backflow standby pipeline 5 is arranged between the first water outlet and the process water recycling cut-off valve 21, so that the process water backflow standby pipeline 5 is conveniently connected with the mechanical seal cooling unit, and the assembly difficulty is reduced.
Specifically, two ends of the process water backflow standby pipeline 5 are respectively provided with a process water recycling manual valve 4. When the process water backflow standby pipeline 5 is required to be overhauled, the two process water recycling manual valves 4 can be closed respectively, so that the influence on the normal operation of the whole desulfurization and denitrification system is avoided when the process water backflow standby pipeline 5 is overhauled. In this embodiment, under the condition that the industrial water supply is normal, the process water recycling manual valve 4 is in a fully opened state, so that when the industrial water supply fails, the mechanical seal cooling unit is conveniently cooled by using the process water.
Wherein, the junction of mechanical seal cooling unit and first export is provided with industrial water pressure gauge 6. Whether the water pressure entering the mechanical seal cooling unit meets the requirement can be measured in real time through the industrial water pressure gauge 6, when the pressure of the water in the pipeline measured on the industrial water pressure gauge 6 is smaller than a preset value, the pressure of the water in the pipeline is too small, the cooling requirement of the mechanical seal cooling unit is difficult to meet, and the slurry pump 8 is easy to damage. Therefore, when the pressure of the water in the pipeline measured by the industrial water pressure gauge 6 is smaller than a preset value, the process water recycling cut-off valve 21 is opened, the flushing water pump 19 is started, and the process water in the process water tank 16 can be led to the mechanical seal cooling unit to cool the slurry pump 8. In this embodiment, the preset value is 0.2MPa. The magnitude of the preset value can be adjusted according to actual conditions.
In detail, a process tank water replenishment valve 15 is provided at the junction of the flushing unit and the first outlet. When the industrial water pipe network system is normal, the process water tank 16 supplements water through the industrial water inlet main pipe 1 according to the liquid level. When the liquid level in the process water tank 16 exceeds the maximum liquid level, the process water tank water supplementing valve 15 is closed to ensure the safety of the process water tank 16; when water is needed to be replenished in the process water tank 16, a process water tank water replenishing valve 15 is opened. The water level in the process water tank 16 can be prevented from exceeding the maximum level by arranging the process water tank water supplementing valve 15, and potential safety hazards are generated.
In this embodiment, the desulfurization and denitration flue gas system includes a mechanical seal cooling unit, a flushing unit and a cooling water unit, and the first water outlet of the industrial water inlet header pipe 1 is connected to the mechanical seal cooling unit, the flushing unit and the cooling water unit, respectively. An industrial water inlet main valve 2 is arranged between a first water inlet of the industrial water inlet main pipe 1 and a process water return main pipe network cut-off valve 3. The mechanical seal cooling unit comprises a mechanical seal cooling water inlet valve 7, a slurry pump 8 and a mechanical seal cooling water outlet valve 9, wherein the mechanical seal cooling water inlet valve 7, the slurry pump 8 and the mechanical seal cooling water outlet valve 9 are sequentially connected into a group of branches, a plurality of groups of branches are arranged in the mechanical seal cooling unit, and the plurality of groups of branches are connected in parallel. The flushing unit comprises a cooling water tower water supplementing valve 10, a cooling water tower 11, a cooling water pump inlet valve 12, a cooling water pump 13 and a cooling water pump outlet valve 14 which are sequentially connected, the flushing unit cools operation equipment such as a regional fan, a Gas Heater (Gas heat exchanger) and the like through the cooling water pump 13 and returns to the cooling water tower 11, and the cooling water tower 11 can supplement water through a pipe network according to the liquid level of the cooling water tower. The flushing unit comprises a process water tank water supplementing valve 15, a process water tank 16, a flushing water pump inlet valve 18, a flushing water pump 19 and a flushing water pump outlet valve 20 which are sequentially connected, the flushing unit flushes a pulping area pipeline and a desulfurizing tower downcomer through the flushing water pump 19, and the process water tank 16 in the flushing unit can supplement water through a pipeline network according to the liquid level.
The using method comprises the following steps: when the industrial water supply is normal, the process water tank 16 keeps a high liquid level, the process water recycling manual valve 4 is in a fully-opened state, the process water recycling cut-off valve 21 is in a closed state, and the process water recycling main network cut-off valve 3 is in a fully-opened state. When the industrial water supply fails, the industrial water pipe network fails to supply industrial water or the industrial water pressure is difficult to meet the requirement of the mechanical seal cooling unit, the flushing water pump 19 is started, the process water recycling cut-off valve 21 is opened, the process water recycling main pipe network cut-off valve 3 is closed, the process water in the process water tank 16 is led to the mechanical seal cooling unit, and the mechanical seal of the slurry pump 8 is cooled. Whether the industrial water pressure meets the requirement of the mechanical seal cooling unit or not can be measured by the industrial water pressure gauge 6. When the water pressure value displayed on the industrial water pressure gauge 6 is smaller than the preset value, the industrial water pressure is difficult to meet the requirement of the mechanical seal cooling unit, and the process water in the process water tank 16 is required to be started to cool the mechanical seal cooling unit; when the water pressure value displayed on the industrial water pressure gauge 6 is greater than or equal to a preset value, the industrial water pressure meets the requirement of the mechanical seal cooling unit. When the failure of the industrial water pipe network is relieved, the industrial water return pipe network cut-off valve is firstly opened, so that industrial water is ensured to enter the desulfurization and denitration flue gas system, and then the process water return cut-off valve 21 and the flushing water pump 19 are closed, so that the normal working state of the desulfurization and denitration flue gas system is recovered.
As shown in fig. 2, the invention provides a process water reflux method of a desulfurization and denitration flue gas system, which comprises the desulfurization and denitration flue gas system, and the process water reflux method of the desulfurization and denitration flue gas system comprises the following steps:
monitoring the state of industrial water;
the process water in the process water tank 16 is used to cool the machine seal cooling unit based on the state of the process water.
The detection of the industrial water state comprises whether the industrial water pipe network supplies water normally or whether the water pressure of the industrial water meets the mechanical sealing and cooling requirements of the slurry pump 8.
Wherein the cooling of the mechanical seal cooling unit using the process water in the process water tank 16 based on the industrial water state includes:
an industrial water pressure gauge 6 is arranged at the joint of the mechanical seal cooling unit and the industrial water inlet header pipe 1;
in the present embodiment, when the water pressure value of the industrial water at the inlet of the mechanical seal cooling unit is smaller than a preset value or the industrial water does not flow into the first inlet, the mechanical seal cooling unit is cooled using the process water in the process water tank 16.
Wherein the process water in the process water tank 16 is used to cool the mechanical seal cooling unit, comprising:
the industrial water inlet main pipe 1 is provided with a process water return main pipe network cut-off valve 3;
the flushing unit comprises a process water tank water outlet pipe 17 connected with a process water tank 16, a flushing water pump 19 and a flushing water pump outlet valve 20 are sequentially connected to the process water tank water outlet pipe 17, a first end of a process water backflow standby pipeline 5 is connected with the mechanical seal cooling unit, and a second end of the process water backflow standby pipeline 5 is arranged between the flushing water pump 19 and the flushing water pump outlet valve 20;
the process water return main pipe network cut-off valve 3 is closed, and the flushing water pump 19 and the process water return cut-off valve 21 are opened.
In summary, by draining the process water in the process water tank 16 to the mechanical seal cooling unit, when the industrial water network is scheduled to be overhauled or the industrial water pressure entering the slurry pump 8 is lower than the equipment protection value, the mechanical seal of the slurry pump 8 can be cooled by the process water, so that the process water can realize self-protection of the system, the normal operation of the desulfurization and denitrification system and the safety of the slurry pump 8 are maintained, the safety of the desulfurization and denitrification system during operation is improved, the damage risk of the slurry pump 8 in different fault states of the industrial water system is reduced, and the maintenance times of equipment are reduced.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. The desulfurization and denitration flue gas system is characterized by comprising an industrial water inlet main pipe, a mechanical seal cooling unit and a flushing unit, wherein the mechanical seal cooling unit and the flushing unit are respectively connected with the industrial water inlet main pipe, the flushing unit comprises a process water tank, the process water tank is connected with the mechanical seal cooling unit through a process water backflow standby pipeline, a process water recycling cut-off valve for opening or closing the process water backflow standby pipeline is arranged on the process water backflow standby pipeline, and the process water backflow standby pipeline is provided with a first end connected with the mechanical seal cooling unit and a second end connected with the flushing unit.
2. The sulfur and denitration flue gas system of claim 1, wherein: and the industrial water inlet main pipe is provided with a process water return main pipe network cut-off valve.
3. The sulfur and denitration flue gas system of claim 1, wherein: the flushing unit comprises a process water tank water outlet pipe connected with the process water tank, a flushing water pump and a flushing water pump outlet valve are sequentially connected to the process water tank water outlet pipe, a first end of a process water backflow standby pipeline is connected with the mechanical seal cooling unit, and a second end of the process water backflow standby pipeline is arranged between the flushing water pump and the flushing water pump outlet valve.
4. The sulfur and denitration flue gas system of claim 2, wherein: the industrial water inlet main pipe is provided with a first water inlet for entering industrial water and a first water outlet for flowing out water, the mechanical seal cooling unit and the flushing unit are respectively connected with the first water outlet, and the first end of the process water backflow standby pipeline is arranged between the first water outlet and the process water recycling cut-off valve.
5. The sulfur and denitration flue gas system of claim 4, wherein: and an industrial water pressure gauge is arranged at the joint of the mechanical seal cooling unit and the first outlet.
6. The sulfur and denitration flue gas system of claim 4, wherein: and a water supplementing valve of the process water tank is arranged at the joint of the flushing unit and the first outlet.
7. The sulfur and denitration flue gas system of claim 1, wherein: and two ends of the process water backflow standby pipeline are respectively provided with a process water recycling manual valve.
8. A process water recirculation method for a desulfurization and denitrification flue gas system, comprising the desulfurization and denitrification flue gas system according to any one of claims 1 to 7, characterized in that the process water recirculation method for a desulfurization and denitrification flue gas system comprises:
monitoring the state of industrial water;
and cooling the mechanical seal cooling unit by using the process water in the process water tank based on the industrial water state.
9. The process water recirculation method of a sulfur and denitration flue gas system according to claim 8, wherein the cooling of the mechanical seal cooling unit using the process water in the process water tank based on the state of the industrial water comprises:
an industrial water pressure gauge is arranged at the joint of the mechanical seal cooling unit and the industrial water inlet main pipe;
and when the water pressure value of the industrial water at the inlet of the mechanical seal cooling unit is smaller than a preset value or the industrial water does not flow into the industrial water inlet main pipe, cooling the mechanical seal cooling unit by using the process water in the process water tank.
10. The process water recirculation method of a sulfur and denitration flue gas system according to claim 9, wherein cooling the mechanical seal cooling unit using the process water in the process water tank includes:
a process water return main pipe network cut-off valve is arranged on the industrial water inlet main pipe;
the flushing unit comprises a process water tank water outlet pipe connected with the process water tank, a flushing water pump and a flushing water pump outlet valve are sequentially connected to the process water tank water outlet pipe, a first end of a process water backflow standby pipeline is connected with the mechanical seal cooling unit, and a second end of the process water backflow standby pipeline is arranged between the flushing water pump and the flushing water pump outlet valve;
and closing the process water return main pipeline shut-off valve, and opening the flushing water pump and the process water recycling shut-off valve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2023113182168 | 2023-10-12 | ||
| CN202311318216 | 2023-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117323799A true CN117323799A (en) | 2024-01-02 |
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ID=89293129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311413008.6A Pending CN117323799A (en) | 2023-10-12 | 2023-10-27 | Desulfurization and denitration flue gas system and process water reflux method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117323799A (en) |
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2023
- 2023-10-27 CN CN202311413008.6A patent/CN117323799A/en active Pending
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