CN217067689U - Calcium chloride solution dewatering system integrated with flue gas cooling system - Google Patents
Calcium chloride solution dewatering system integrated with flue gas cooling system Download PDFInfo
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- CN217067689U CN217067689U CN202220926601.5U CN202220926601U CN217067689U CN 217067689 U CN217067689 U CN 217067689U CN 202220926601 U CN202220926601 U CN 202220926601U CN 217067689 U CN217067689 U CN 217067689U
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Abstract
The utility model discloses a calcium chloride solution dewatering system integrated with a flue gas cooling system, which comprises a flue gas cooling tower, wherein a four-stage cooling spray device is arranged in the flue gas cooling tower along the flue gas flow direction, the circulating liquid used by the cooling spray device close to the flue gas inlet and the cooling spray device close to the flue gas outlet is calcium chloride solution, the circulating liquid outlets of the cooling spray device close to the flue gas inlet and the cooling spray device close to the flue gas outlet are connected with a buffer tank through pipelines, the circulating liquid in the buffer tank is respectively connected with the cooling spray device close to the flue gas inlet and the circulating liquid inlet of the cooling spray device close to the flue gas outlet through two pipelines, the calcium chloride solution with reduced water content in a first-stage cooling spray device is mixed with the calcium chloride solution with increased water content in a fourth-stage cooling spray device, and the flue gas is conveyed back to the flue gas cooling tower after reaching the water balance, so that the energy consumption of the system is not increased, and the energy waste is avoided.
Description
Technical Field
The utility model belongs to the technical field of the flue gas cooling, specifically be a calcium chloride solution dewatering system who integrates with flue gas cooling system.
Background
In the field of low-temperature flue gas pollutant integrated removal, in order to improve the adsorption capacity of a unit adsorbent and reduce the filling volume of the adsorbent, the flue gas needs to be cooled to subzero temperature from high temperature in a grading manner, because the flue gas contains water, in the process of continuously cooling the flue gas below zero DEG C, if a method of indirectly exchanging heat between the flue gas and a calcium chloride solution is adopted, along with the increase of operation time, the moisture in the flue gas can be frozen on the flue gas side in a heat exchanger, the resistance of the heat exchanger is increased, even the flue gas is blocked, if a method of directly exchanging heat between the flue gas and the calcium chloride solution is adopted, along with the increase of the operation time, the calcium chloride solution can be diluted by the moisture in the flue gas, the freezing point of the calcium chloride solution is increased, a fresh calcium chloride solution needs to be supplemented or replaced, the operation stability of a system is influenced, and the consumption of the calcium chloride solution is increased, and the operation cost is increased.
The traditional calcium chloride solution dehydration method generally adopts drying agent drying or a direct heating evaporation method, a large amount of heat energy is consumed in the process of regeneration or heating evaporation of the drying agent after water absorption, energy waste is caused, a series of heating and cooling devices are required to be added, and the process is complicated. Therefore, we propose a calcium chloride solution dehydration system integrated with a flue gas cooling system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at improving and innovating the defects and the problems existing in the background technology and providing a calcium chloride solution dehydration system integrated with a flue gas cooling system.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a calcium chloride solution dewatering system with flue gas cooling system integration, includes the flue gas cooling tower, be provided with tertiary cooling spray set at least along flue gas air current direction in the flue gas cooling tower, the cooling spray set that is close to flue gas import department and the used circulating liquid of cooling spray set that is close to exhanst gas exit department are calcium chloride solution, the cooling spray set that is close to flue gas import department and the circulating liquid export that is close to the cooling spray set of exhanst gas exit department all link to each other with the buffer tank through the pipeline, circulating liquid rethread two way pipelines in the buffer tank link to each other with the cooling spray set that is close to flue gas import department and the circulating liquid import that is close to the cooling spray set of exhanst gas exit respectively.
The further scheme is that the circulating liquid in the buffer tank is connected with a circulating liquid inlet of a cooling spraying device close to the smoke outlet after passing through a first cooling pump and a low-temperature refrigerator through a pipeline.
The further scheme is that the circulating liquid in the buffer tank is connected with a circulating liquid inlet of a cooling spraying device close to the flue gas inlet after passing through a second chemical pump and a heat exchanger through a pipeline.
The further proposal is that a circulating liquid outlet of the cooling spray device close to the flue gas inlet is connected with a buffer tank after passing through a first chemical pump and a heat exchanger.
The further scheme is that four-stage cooling spray devices are sequentially arranged in the flue gas cooling tower along the flue gas airflow direction, the circulating liquid used by the second-stage cooling spray device and the third-stage cooling spray device is cooling water, and the bottom end of the third-stage cooling spray device is connected with the upper end of the second-stage cooling spray device through overflow pipes, so that the circulating liquid of the third-stage cooling spray device can overflow into the second-stage cooling spray device.
The further scheme is that an external discharge pipe is arranged at the bottom end of the second-stage cooling and spraying device.
The further scheme is that a circulating liquid outlet of the second-stage cooling spraying device is connected with a circulating liquid inlet of the second-stage cooling spraying device through a ventilation cooling tower and a third cooling pump through a pipeline.
The third stage cooling spray device comprises a circulating liquid inlet, a circulating liquid outlet, a circulating liquid inlet and a circulating liquid outlet.
Compared with the prior art, the beneficial effects of the utility model are that: (1) the utility model mixes the calcium chloride solution with reduced water content in the first-stage cooling spray device and the calcium chloride solution with increased water content in the fourth-stage cooling spray device together, and conveys the calcium chloride solution back to the flue gas cooling tower after reaching water balance to perform countercurrent heat exchange with the flue gas, compared with the traditional calcium chloride solution dehydration method which generally adopts drying agent drying or adopts direct heating evaporation, the method does not increase the energy consumption of the system, and avoids the waste of energy;
(2) the bottom end of the third cooling spray device is connected with the upper end of the second cooling spray device through an overflow pipe, so that circulating liquid cooling water of the third cooling spray device can overflow into the second cooling spray device, cooling water can be supplemented to the second cooling spray device on one hand, and cooling capacity is conveyed to the second cooling spray device on the other hand, thereby avoiding energy waste caused by the outward discharge of the cooling water;
(3) the heat exchanger is additionally arranged at the circulating liquid inlet of the first-stage cooling spraying device, so that the effect of improving the water inlet temperature of circulating liquid cooling water is achieved, and the phenomenon that the temperature difference between the calcium chloride solution with lower temperature and the flue gas in the first cooling tower spraying device is too large, so that the flue gas temperature in the first cooling tower spraying device is greatly reduced is avoided.
Drawings
FIG. 1 is a process flow diagram of the present invention;
reference numerals: the system comprises a flue gas cooling tower 1, a fan 2, a first chemical pump 3, a heat exchanger 4, a second chemical pump 5, a buffer tank 6, a first cooling pump 7, a low-temperature refrigerator 8, a medium-temperature refrigerator 9, a second cooling pump 10, a third cooling pump 11, a ventilation cooling tower 12, an overflow pipe 13 and an outer discharge pipe 14.
Detailed Description
The present invention will be described in further detail with reference to fig. 1.
The utility model provides a calcium chloride solution dewatering system with flue gas cooling system integration, includes flue gas cooling tower 1, along flue gas air current direction from the bottom up has set gradually level four cooling spray set in flue gas cooling tower 1, high temperature flue gas passes through in fan 2 introduces flue gas cooling tower 1. The circulating liquid used by the first-stage cooling spray device and the fourth-stage cooling spray device is a calcium chloride solution, the circulating liquid used by the second-stage cooling spray device and the third-stage cooling spray device is cooling water, circulating liquid outlets of the first-stage cooling spray device and the fourth-stage cooling spray device are connected with the buffer tank 6 through pipelines, and the circulating liquid in the buffer tank 6 is connected with circulating liquid inlets of the first-stage cooling spray device and the fourth-stage cooling spray device through two pipelines respectively.
Furthermore, the circulating liquid in the buffer tank 6 is connected with a circulating liquid inlet of the fourth-stage cooling spray device through a first cooling pump 7 and a low-temperature refrigerator 8 through pipelines, the first cooling pump 7 is used for providing power, so that the circulating liquid flows back into the fourth-stage cooling spray device from the buffer tank 6, and the low-temperature refrigerator 8 is used for providing cold for the circulating liquid.
Further, circulation liquid in the buffer tank 6 passes through the pipeline and links to each other with first order cooling spray set's circulation liquid import behind second chemical industry pump 5 and heat exchanger 4, first order cooling spray set's circulation liquid export links to each other with buffer tank 6 behind first chemical industry pump 3 and heat exchanger 4, heat exchanger 4 is used for first order cooling spray set's circulation liquid feed liquid and circulation liquid play liquid to carry out the heat exchange, play the effect that improves circulation liquid calcium chloride solution inlet water temperature, avoid the lower calcium chloride solution of the temperature that buffer tank 6 came out because the flue gas difference in temperature in with first cooling tower spray set is too big, and cause flue gas temperature to descend by a wide margin in the first cooling tower spray set.
Further, the bottom of third level cooling spray set links to each other through overflow pipe 13 and second grade cooling spray set's upper end for the circulation liquid that tertiary cooling spray set increased can overflow in the second grade cooling spray set, can supply the cooling water for the second cooling spray set on the one hand, and on the other hand carries second grade cooling spray set with cold volume, avoids the cooling water to arrange outward and causes the waste of the energy. The bottom end of the second-stage cooling spraying device is provided with an outer discharge pipe 14, and the outer discharge pipe 14 can discharge redundant cooling water of the second-stage cooling spraying device.
Further, a circulating liquid outlet of the second-stage cooling spray device is connected with a circulating liquid inlet of the second-stage cooling spray device through a ventilation cooling tower 12 and a third cooling pump 11 through a pipeline, and the ventilation cooling tower 12 reduces the temperature of circulating liquid cooling water through evaporation.
Furthermore, a circulating liquid outlet of the third-stage cooling spray device is connected with a circulating liquid inlet of the third-stage cooling spray device through a second cooling pump 10 and a medium temperature refrigerator 9 through pipelines, the second cooling pump 10 is used for providing power, and the medium temperature refrigerator 9 is used for refrigerating to reduce the temperature of circulating liquid cooling water.
The utility model discloses a theory of operation: when the device is used specifically, high-temperature flue gas is introduced into a flue gas cooling tower 1 through a fan 2, the flue gas firstly enters a first-stage cooling spraying device to perform countercurrent heat exchange with a calcium chloride solution, the temperature of the flue gas is reduced from 80 ℃ to 60 ℃, and because the temperature of the flue gas is higher, the moisture in the flue gas is not saturated, and the flue gas takes away the moisture in the calcium chloride solution; then the flue gas enters a second-stage cooling spraying device and is cooled by cooling water, and the temperature of the flue gas is reduced to 40 ℃ from 60 ℃; then the flue gas enters a third-stage cooling spray device and is continuously cooled by cooling water, the temperature of the flue gas is reduced from 40 ℃ to 5 ℃, and because the temperature of the flue gas is lower, moisture in the flue gas can be separated out, so that the water quantity of the cooling water in the third-stage cooling spray device is increased, and the redundant moisture can overflow to a second-stage cooling spray device through an overflow pipe 12; finally, the flue gas enters a fourth-stage cooling spray device to perform countercurrent heat exchange with the circulating liquid calcium chloride solution, the temperature of the flue gas is reduced from 5 ℃ to-20 ℃ and then the flue gas is discharged out of the flue gas cooling tower 1, a large amount of moisture in the flue gas can be separated out, and the water content of the circulating liquid calcium chloride solution of the fourth-stage cooling spray device is increased; because the circulating liquid outlets of the first-stage cooling spray device and the fourth-stage cooling spray device are connected with the buffer tank 6 through pipelines, the calcium chloride solution with the reduced water content in the first-stage cooling spray device and the calcium chloride solution with the increased water content in the fourth-stage cooling spray device are mixed together, and the calcium chloride solution with the increased water content in the first-stage cooling spray device and the calcium chloride solution with the increased water content in the fourth-stage cooling spray device return to the flue gas cooling tower 1 after reaching the water balance to perform countercurrent heat exchange with the flue gas.
The above embodiments are used to illustrate the technical solutions of the present invention and not to limit the same, and those skilled in the art should understand that any modification, equivalent replacement or improvement made to the technical solutions of the present invention within the spirit and principle of the present invention are all included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a calcium chloride solution dewatering system with flue gas cooling system integration, includes flue gas cooling tower (1), its characterized in that: the flue gas cooling tower is characterized in that at least three stages of cooling spray devices are arranged in the flue gas cooling tower (1) along the flue gas flow direction, circulating liquid used by the cooling spray devices close to the flue gas inlet and circulating liquid used by the cooling spray devices close to the flue gas outlet are calcium chloride solutions, circulating liquid outlets of the cooling spray devices close to the flue gas inlet and the cooling spray devices close to the flue gas outlet are connected with a buffer tank (6) through pipelines, and the circulating liquid in the buffer tank (6) is connected with the cooling spray devices close to the flue gas inlet and the circulating liquid inlets of the cooling spray devices close to the flue gas outlet through two pipelines.
2. The system of claim 1, wherein the system comprises a calcium chloride solution dehydration system integrated with a flue gas cooling system, and the system comprises: and circulating liquid in the buffer tank (6) passes through a first cooling pump (7) and a low-temperature refrigerator (8) through a pipeline and then is connected with a circulating liquid inlet of a cooling spraying device close to a flue gas outlet.
3. The system of claim 1, wherein the system comprises a calcium chloride solution dehydration system integrated with a flue gas cooling system, and the system comprises: and circulating liquid in the buffer tank (6) passes through a second chemical pump (5) and the heat exchanger (4) through a pipeline and then is connected with a circulating liquid inlet of a cooling spraying device close to the flue gas inlet.
4. The system of claim 3, wherein the system comprises a calcium chloride solution dehydration system integrated with a flue gas cooling system, and the system comprises: and a circulating liquid outlet of the cooling spraying device close to the flue gas inlet is connected with a buffer tank (6) after passing through a first chemical pump (3) and a heat exchanger (4).
5. The system of any one of claims 1 to 4, wherein the system is integrated with a flue gas cooling system and comprises: four-stage cooling spray devices are sequentially arranged in the flue gas cooling tower (1) along the flue gas airflow direction, the circulating liquid used by the second-stage cooling spray device and the third-stage cooling spray device is cooling water, and the bottom end of the third-stage cooling spray device is connected with the upper end of the second-stage cooling spray device through an overflow pipe (13) so that the circulating liquid of the third-stage cooling spray device can overflow into the second-stage cooling spray device.
6. The system of claim 5, wherein the system comprises a calcium chloride solution dehydration system integrated with a flue gas cooling system, and the system comprises: and an outer discharge pipe (14) is arranged at the bottom end of the second-stage cooling and spraying device.
7. The system of claim 5, wherein the system comprises a calcium chloride solution dehydration system integrated with a flue gas cooling system, and the system comprises: and a circulating liquid outlet of the second-stage cooling spray device is connected with a circulating liquid inlet of the second-stage cooling spray device through a ventilation cooling tower (12) and a third cooling pump (11) by pipelines.
8. The system of claim 6, wherein the system comprises a calcium chloride solution dehydration system integrated with a flue gas cooling system, and the system further comprises: and a circulating liquid outlet of the second-stage cooling spray device is connected with a circulating liquid inlet of the second-stage cooling spray device through a ventilation cooling tower (12) and a third cooling pump (11) by pipelines.
9. The system of claim 5, wherein the system comprises a calcium chloride solution dehydration system integrated with a flue gas cooling system, and the system comprises: and a circulating liquid outlet of the third-stage cooling spray device is connected with a circulating liquid inlet of the third-stage cooling spray device through a second cooling pump (10) and a medium temperature refrigerator (9) by pipelines.
10. The system of claim 6, wherein the system comprises a calcium chloride solution dehydration system integrated with a flue gas cooling system, and the system comprises: and a circulating liquid outlet of the third-stage cooling spray device is connected with a circulating liquid inlet of the third-stage cooling spray device through a second cooling pump (10) and a medium temperature refrigerator (9) by pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220926601.5U CN217067689U (en) | 2022-04-21 | 2022-04-21 | Calcium chloride solution dewatering system integrated with flue gas cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220926601.5U CN217067689U (en) | 2022-04-21 | 2022-04-21 | Calcium chloride solution dewatering system integrated with flue gas cooling system |
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| Publication Number | Publication Date |
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| CN217067689U true CN217067689U (en) | 2022-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220926601.5U Active CN217067689U (en) | 2022-04-21 | 2022-04-21 | Calcium chloride solution dewatering system integrated with flue gas cooling system |
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| CN (1) | CN217067689U (en) |
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2022
- 2022-04-21 CN CN202220926601.5U patent/CN217067689U/en active Active
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