CN115854733A - Vacuum exhaust condensation water-saving system of green mud filter - Google Patents
Vacuum exhaust condensation water-saving system of green mud filter Download PDFInfo
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- CN115854733A CN115854733A CN202310115626.6A CN202310115626A CN115854733A CN 115854733 A CN115854733 A CN 115854733A CN 202310115626 A CN202310115626 A CN 202310115626A CN 115854733 A CN115854733 A CN 115854733A
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- 238000009833 condensation Methods 0.000 title claims abstract description 16
- 230000005494 condensation Effects 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000010865 sewage Substances 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 238000001704 evaporation Methods 0.000 claims abstract description 15
- 230000008020 evaporation Effects 0.000 claims abstract description 15
- 239000000498 cooling water Substances 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000005202 decontamination Methods 0.000 description 2
- 230000003588 decontaminative effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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Abstract
A vacuum exhaust condensation water-saving system of a green mud filter comprises the green mud filter, a high-level condenser, a vacuum pump and a circulating heat exchange device; an outlet of a vacuum separation tank of the green mud filter is connected with a gas inlet at the bottom of the high-level condenser, and a gas outlet at the top of the high-level condenser is connected with a gas inlet of the vacuum pump; a liquid outlet at the bottom of the high-level condenser is connected with a liquid drainage pipeline, the bottom end of the liquid drainage pipeline is positioned in a water seal tank, and the water seal tank is connected with a middle sewage condensation water pipeline of an evaporation section; the circulating heat exchange device comprises a heat exchanger and a circulating pump, wherein the heat exchanger comprises a shell and a heat exchange coil pipe positioned in the shell, cooling water is arranged in the shell, and the side wall of the shell is respectively connected with a cooling water inlet pipe and a cooling water outlet pipe; the inlet of the heat exchange coil is positioned at the lower part of the shell and is connected with the outlet of the circulating pump, and the inlet of the circulating pump is connected with the water seal tank; the outlet of the heat exchange coil is positioned at the upper part of the shell and is connected with the liquid inlet at the top of the high-level condenser.
Description
Technical Field
The invention belongs to the technical field of pulping and papermaking, and particularly relates to a vacuum exhaust condensation water-saving system of a green mud filter.
Background
The green mud filter is vacuumized by using a vacuum pump, and the filtering function is realized by pressure difference. The gas extracted from the green mud filter contains moisture and pollution components, and is cooled by a high-level condenser to remove part of moisture, so that the gas can enter a vacuum pump. The high-level condenser is used for directly contacting gas through injected normal-temperature clean water, so that moisture in the gas is cooled and condensed. However, as capacity increases, the amount of water required will increase. In addition, since not only moisture is condensed during the condensation of the gas, but also a part of the soluble contaminants is dissolved in the water, a large amount of sewage is formed. The drainage of the high-level condenser is generally discharged into a sewage treatment plant, the cost is required for sewage treatment, and the pressure of the sewage treatment plant is increased. Therefore, the current vacuum exhaust condensing system of the green mud filter has the problems of large water consumption of clean water and large discharge capacity.
Disclosure of Invention
The invention aims to provide a vacuum exhaust condensation water-saving system of a green mud filter, which can reduce the use amount of clear water, avoid a spray water decontamination water treatment plant, save energy and protect environment.
In order to realize the purpose, the invention adopts the following technical scheme:
a vacuum exhaust condensation water-saving system of a green mud filter comprises the green mud filter, a high-level condenser, a vacuum pump and a circulating heat exchange device; an outlet of a vacuum separation tank of the green mud filter is connected with a gas inlet at the bottom of the high-level condenser through a first pipeline, and a gas outlet at the top of the high-level condenser is connected with a gas inlet of the vacuum pump through a second pipeline; a liquid outlet at the bottom of the high-level condenser is connected with a liquid drainage pipeline, the bottom end of the liquid drainage pipeline is positioned in a water seal tank, and the water seal tank is connected with a middle sewage condensation water pipeline of an evaporation section; the circulating heat exchange device comprises a heat exchanger and a circulating pump, wherein the heat exchanger comprises a shell and a heat exchange coil pipe positioned in the shell, cooling water is arranged in the shell, and the side wall of the shell is respectively connected with a cooling water inlet pipe and a cooling water outlet pipe; the inlet of the heat exchange coil is positioned at the lower part of the shell and is connected with the outlet of the circulating pump through a third pipeline, and the inlet of the circulating pump is connected with the water seal tank through a fourth pipeline; the outlet of the heat exchange coil is positioned at the upper part of the shell and is connected with the liquid inlet at the top of the high-level condenser through a fifth pipeline.
Furthermore, the middle part of the third pipeline is connected with a sixth pipeline of a blowdown valve, and the tail end of the sixth pipeline is connected to a heavy sewage condensate tank of an evaporation section.
Furthermore, a water level sensor is arranged in the water seal tank and is connected with a controller of the drain valve.
The invention has the beneficial effects that:
1. when the invention is used, clean water is not normally used, and the clean water is only used for supplementing water or changing water regularly;
2. when the invention is used, the middle-sewage condensed water in the evaporation section and the sewage discharged by the high-level condenser are used as cooling water for recycling, only water is supplemented or replaced periodically, and the water consumption is low;
3. when the invention is used, a spray water decontamination treatment plant is avoided, the sewage treatment cost is saved, and the invention is energy-saving and environment-friendly.
Drawings
FIG. 1 is a schematic structural view of a vacuum exhaust condensation water-saving system of a green mud filter.
Detailed Description
The present invention will be described with reference to the following embodiments and drawings, but the embodiments are only for illustrative purposes and are not intended to limit the scope of the present invention.
As shown in figure 1, the invention provides a vacuum exhaust condensation water-saving system of a green mud filter, which comprises a green mud filter 1, a high-level condenser 2, a vacuum pump 3 and a circulating heat exchange device 4. The outlet of the vacuum separation tank of the green mud filter 1 is connected with the gas inlet 21 at the bottom of the high-level condenser 2 through a first pipeline 51, and the gas outlet 22 at the top of the high-level condenser 2 is connected with the gas inlet 31 of the vacuum pump 3 through a second pipeline 52. The liquid outlet 23 at the bottom of the high-level condenser 2 is connected with a liquid discharge pipeline 24, the bottom end of the liquid discharge pipeline 24 is positioned in a water sealing pool 6, and the water sealing pool 6 is connected with a middle-sewage condensed water pipeline 61 of an evaporation section. The circulating heat exchange device 4 comprises a heat exchanger 41 and a circulating pump 42, the heat exchanger 41 comprises a shell 411 and a heat exchange coil 412 positioned in the shell 411, cooling water is arranged in the shell 411, and the side wall of the shell 411 is respectively connected with a cooling water inlet pipe 43 and a cooling water outlet pipe 44. The inlet of the heat exchange coil 412 is located at the lower part of the shell 411 and is connected with the outlet of the circulating pump 42 through a third pipeline 53, and the inlet of the circulating pump 42 is connected with the water seal tank 6 through a fourth pipeline 54. The outlet of the heat exchange coil 412 is located in the upper part of the shell 411 and is connected to the liquid inlet 25 at the top of the higher level condenser 2 via a fifth line 55.
In order to prevent the liquid level in the water seal tank 6 from being too high, the middle part of the third pipeline 53 is connected with a sixth pipeline 56 of a blowdown valve 57, and the tail end of the sixth pipeline 56 is connected to the heavy sewage condensate tank 7 of the evaporation section, so that the redundant sewage in the water seal tank 6 is discharged into the heavy sewage condensate tank 7 of the evaporation section. In order to improve the automation degree, a water level sensor 62 is arranged in the water seal tank 6, and the water level sensor 62 is connected with the controller of the drain valve 57 so as to discharge the redundant sewage in the water seal tank 6 into the heavy sewage condensate tank 7 of the evaporation section when the sewage in the water seal tank 6 reaches a set liquid level.
Specifically, the working process of the vacuum exhaust condensation water-saving system of the green mud filter is as follows:
firstly, the reclaimed sewage condensate water in the evaporation section is supplemented to the water seal tank 6 through the reclaimed sewage condensate water pipeline 61, and the advantage is that the reclaimed sewage condensate water is softened water and is not easy to scale. Secondly, the medium sewage condensed water is cooled to 43 ℃ through the heat exchanger 41, the sprayed water returns to the water sealing tank 6 again after being sprayed in the high-level condenser 2, the sprayed water and the medium sewage condensed water after being heated are cooled to 43 ℃ through the heat exchanger 41 again by using the circulating pump 42, and the using amount of the clear water and the medium sewage condensed water in the evaporation section is reduced by circularly spraying. In addition, the liquid level of the water seal tank 6 is controlled by the sixth pipeline 56 and the drain valve 57 thereof through liquid level linkage, and sewage is conveyed to the heavy sewage condensate tank 7 of the evaporation section when the liquid level is high, so that the sewage is prevented from being discharged into a sewage treatment plant, and the sewage treatment cost is reduced.
The invention selects the middle-sewage condensate water in the evaporation section and the spray water discharged by the high-level condenser as the condensing medium of the high-level condenser, the condensate water is cooled by the heat exchanger after being sprayed for recycling, only when needed, a small amount of water in the water seal tank is sent into the heavy-sewage condensate water tank in the evaporation section through the drain valve, and the condensate water is not sent into a sewage treatment plant, thereby saving energy and protecting environment.
The invention is defined by the claims. Based on this, it should be understood that various obvious changes and modifications can be made by those skilled in the art, which are within the main spirit and scope of the present invention.
Claims (3)
1. A vacuum exhaust condensation water-saving system of a green mud filter is characterized by comprising the green mud filter, a high-level condenser, a vacuum pump and a circulating heat exchange device; an outlet of a vacuum separation tank of the green mud filter is connected with a gas inlet at the bottom of the high-level condenser through a first pipeline, and a gas outlet at the top of the high-level condenser is connected with a gas inlet of the vacuum pump through a second pipeline; a liquid outlet at the bottom of the high-level condenser is connected with a liquid drainage pipeline, the bottom end of the liquid drainage pipeline is positioned in a water seal tank, and the water seal tank is connected with a middle sewage condensation water pipeline of an evaporation section; the circulating heat exchange device comprises a heat exchanger and a circulating pump, wherein the heat exchanger comprises a shell and a heat exchange coil positioned in the shell, cooling water is arranged in the shell, and the side wall of the shell is respectively connected with a cooling water inlet pipe and a cooling water outlet pipe; the inlet of the heat exchange coil is positioned at the lower part of the shell and is connected with the outlet of the circulating pump through a third pipeline, and the inlet of the circulating pump is connected with the water seal tank through a fourth pipeline; the outlet of the heat exchange coil is positioned at the upper part of the shell and is connected with the liquid inlet at the top of the high-level condenser through a fifth pipeline.
2. The vacuum exhaust condensation water saving system of the green mud filter as set forth in claim 1, wherein: and the middle part of the third pipeline is connected with a sixth pipeline of a blowdown valve, and the tail end of the sixth pipeline is connected to a heavy sewage condensate tank of an evaporation working section.
3. The vacuum exhaust condensation water saving system of the green mud filter as claimed in claim 2, wherein: and a water level sensor is arranged in the water seal tank and is connected with a controller of the drain valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310115626.6A CN115854733A (en) | 2023-02-08 | 2023-02-08 | Vacuum exhaust condensation water-saving system of green mud filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310115626.6A CN115854733A (en) | 2023-02-08 | 2023-02-08 | Vacuum exhaust condensation water-saving system of green mud filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115854733A true CN115854733A (en) | 2023-03-28 |
Family
ID=85658076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310115626.6A Pending CN115854733A (en) | 2023-02-08 | 2023-02-08 | Vacuum exhaust condensation water-saving system of green mud filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115854733A (en) |
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2023
- 2023-02-08 CN CN202310115626.6A patent/CN115854733A/en active Pending
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