CN213725663U - System for controlling liquid level of absorption tower - Google Patents
System for controlling liquid level of absorption tower Download PDFInfo
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- CN213725663U CN213725663U CN202022515947.XU CN202022515947U CN213725663U CN 213725663 U CN213725663 U CN 213725663U CN 202022515947 U CN202022515947 U CN 202022515947U CN 213725663 U CN213725663 U CN 213725663U
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Abstract
The utility model relates to a wet flue gas desulfurization absorption tower relevant environmental protection equipment field specifically is a system of control absorption tower liquid level. The utility model comprises an isolation sedimentation pipe group arranged in a pulp tank of the absorption tower and an outer tower collecting pipe arranged outside the absorption tower; the isolation settling pipe group comprises a plurality of isolation settling pipes; the isolation settling tubes are uniformly arranged along the circumferential direction of the absorption tower slurry pool, each isolation settling tube is obliquely inserted into the absorption tower slurry pool, and is vertically folded towards the bottom of the absorption tower after being inserted into the absorption tower, and the top end extending out of the absorption tower is communicated with the collection pipe outside the tower. The utility model discloses an at absorption tower thick liquid pond area arrangement isolation sedimentation nest of tubes, utilize the isolation effect of each isolation sedimentation pipe itself, through the natural sedimentation effect of the inside thick liquid of isolation sedimentation pipe, realize partial absorption tower thick liquid solid-liquid separation, the liquid level and the water balance that can the effective control absorption tower outside the automatic discharge absorption tower of supernatant of isolating, avoided increasing the operating cost increase that desulfurization waste water outer row etc. arouses for controlling the absorption tower liquid level.
Description
Technical Field
The utility model relates to a wet flue gas desulfurization absorption tower relevant environmental protection equipment field specifically is a system of control absorption tower liquid level.
Background
Along with the strictness of environmental protection policies of various regions in recent years, all coal-fired boilers with modification conditions in China are required to strive for realizing ultralow emission, for example, the emission concentrations of smoke dust, sulfur dioxide and nitrogen oxides are respectively not higher than 10 mg/cubic meter, 35 mg/cubic meter and 50 mg/cubic meter under the condition that the standard oxygen content is 6% as required by the thermal power industry. Wherein to the control of dust, part coal fired power plant adopts low temperature electrostatic precipitator and the high-efficient defogging dust removal technique in coordination of absorption tower in order to realize the ultralow emission of dust, and this technique needs add low temperature economizer before the electrostatic precipitator in order to reduce that the flue gas temperature improves electrostatic precipitator operation effect before the electrostatic precipitator, sets up the carrying of flue gas liquid drop and dust in the absorption tower with less tower of multistage defogging dust collector in the absorption tower.
In the above process, there are two problems: on one hand, the use of the low-temperature economizer causes the reduction of the temperature of the flue gas at the inlet of the absorption tower, which causes the reduction of the evaporation capacity in the absorption tower, and the liquid level and the water balance of the absorption tower are difficult to control; on the other hand, for guaranteeing multistage high-efficient defogging dust collector operation effect in coordination in the absorption tower, inevitable adoption a large amount of process water washes, and the process water that washes in a large number finally gets into absorption tower thick liquid pond and will further aggravate the uncontrollable of absorption tower liquid level and water balance. At present, for guaranteeing that absorption tower liquid level and water balance can be controlled among the desulfurization system operation process, often through the method of blindly reducing high-efficient defogging dust collector's frequency of washing and increasing desulfurization waste water's outer row, nevertheless reduce to wash and can bring the potential safety hazard for high-efficient in coordination defogging dust collector's operation, and increase desulfurization waste water outer row and can arouse the running cost increase by a wide margin.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides a system of control absorption tower liquid level can effectively carry out solid-liquid separation to the partial thick liquid in the absorption tower thick liquid pond to can effective control absorption tower liquid level and water balance, effective water conservation, the cost is lower, safe and reliable.
The utility model discloses a realize through following technical scheme:
a system for controlling the liquid level of an absorption tower comprises an isolation sedimentation tube group arranged in a slurry pool of the absorption tower and an outer tower collecting tube arranged outside the absorption tower;
the isolation settling tube group comprises a plurality of isolation settling tubes; the isolation settling tubes are uniformly arranged along the circumferential direction of the absorption tower slurry tank, each isolation settling tube is obliquely inserted into the absorption tower slurry tank, is vertically folded towards the bottom of the absorption tower after being inserted into the absorption tower, and extends out of the top end of the absorption tower to be communicated with the collection pipe outside the tower.
Furthermore, the heights of the top end of the isolation settling tube and the collecting tube outside the tower are both lower than the designed liquid level of the absorption tower.
Furthermore, the distance between the insertion point of each isolation settling tube inserted into the pulp tank of the absorption tower and the designed liquid level of the absorption tower is 1.5m-2.0m, and the distance between the bottom end of each isolation settling tube and the bottom of the absorption tower is 1.0m-2.0 m.
Further, the isolation settling tube group comprises 8-16 isolation settling tubes.
Furthermore, the nominal diameter range of a single pipeline of the isolation settling tube is 0.15-0.5 m.
Further, the absorption tower also comprises a collecting pit arranged outside the absorption tower; the input end of the collecting pit is connected with a collecting pipe outside the tower.
Furthermore, the output end of the collecting pit is connected with the input end of a water flushing system of the demisting and dedusting device through a pump set.
Compared with the prior art, the utility model discloses following profitable technological effect has:
the utility model discloses a separate the sedimentation tube group in absorption tower thick liquid pond area arrangement, utilize the isolation effect of each isolation sedimentation tube itself, through the natural sedimentation effect of the inside thick liquid of isolation sedimentation tube, realized the solid-liquid separation of part absorption tower thick liquid, the liquid level and the water balance of absorption tower can be effectively controlled to the automatic absorption tower that discharges of the supernatant fluid of separation, have avoided increasing the operating cost that desulfurization waste water arranges etc. and arouses in order to control the absorption tower liquid level; meanwhile, the discharged supernatant is collected and recycled, and the supernatant is used for replacing process water in consideration of the fact that the solid content of the supernatant meets the requirement of flushing water of a demisting and dedusting device, so that the consumption of part of water is avoided, and a certain water-saving effect is achieved.
Drawings
Fig. 1 is a schematic view of the structure installation in the embodiment of the present invention.
In the figure: wherein, 1 is the absorption tower thick liquid pond, 2 is the side formula agitator, 3 is defogging dust collector, 4 is the isolation sedimentation nest of tubes, 5 is the outer collecting pipe of tower, 6 is the collection hole, 7 is the pump package, 8 is defogging dust collector wash water system.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The utility model relates to a system for controlling the liquid level of an absorption tower, which comprises an isolation sedimentation pipe group 4, an outside-tower collecting pipe 5, a collecting pit 6, a pump group 7 and a washing water system 8 of a demisting and dedusting device, as shown in figure 1; wherein the isolation settling tube group 4 comprises 8-16 isolation settling tubes, the nominal diameter of the pipeline of a single isolation settling tube is 0.15-0.5 m, preferably 0.2-0.4 m; the isolation settling tube group 4 is obliquely inserted into the absorption tower slurry pool 1; the collecting pipe 5 outside the tower is connected with the part outside the tower of the isolation settling pipe group 4 to lead the collecting liquid into a collecting pit 6; the pump unit 7 pumps the supernatant collected in the collection pit 6 into a washing water system 8 of the demisting and dedusting device.
Wherein, the isolation settling tube group in the preferred embodiment comprises 8 to 16 tubes, the nominal diameter of each tube is 0.15m to 0.4m, the tubes are uniformly arranged in the area of the slurry tank 1 of the absorption tower along the circumferential direction of the absorption tower, each isolation settling tube is obliquely inserted into the slurry tank area 1 of the absorption tower, the distance from the insertion point to the design liquid level of the absorption tower is d1, d1 is 1.5 to 2.0m, the isolation settling tube is vertically folded towards the bottom of the absorption tower after being inserted into the absorption tower, the distance from the bottom of the absorption tower is d2, and d2 is 1.0 to 2.0 m;
wherein, the solid content of the slurry in the slurry tank 1 of the absorption tower is generally about 10-25%, and all the slurry is in a uniform flowing state in the tower under the action of the side-feeding type stirrer 2 of the absorption tower, and natural sedimentation can not occur. When a plurality of isolation settling tubes are inserted into the slurry tank of the absorption tower, the slurry in the isolation settling tubes cannot flow under the isolation effect of the pipeline, the slurry with higher solid content naturally settles in the isolation settling tubes, the solid in the slurry sinks to the bottom of the isolation settling tubes until the slurry flows out of the isolation settling tubes, and the supernatant is left at the upper parts of the isolation settling tubes; meanwhile, due to the height difference between the liquid level of the absorption tower and the isolation settling tube, the supernatant can be automatically discharged out of the absorption tower, so that the liquid level and the water balance of the absorption tower are controlled by controlling the discharge amount of the supernatant.
Wherein, the column outer collecting pipe 5 for collecting the supernatant outside the absorption column is reasonably arranged (the installation position is kept below the liquid level of the absorption column), and the supernatant discharged outside the absorption column can be led out through the column outer collecting pipe 5 and then flows into the collecting pit 6. Considering that the water quality of the part of supernatant meets the requirement of the washing water quality of the demisting and dedusting device 3, a pump set 7 is arranged to blow the supernatant into a demisting and dedusting device washing water system 8 for washing the demisting and dedusting device 3.
In practical application, the method comprises the following steps of,
when the isolation settling tube group 4 is inserted into the absorption tower, the slurry inside the isolation settling tube group 4 cannot flow due to the isolation effect of the isolation settling tube group 4;
the slurry with higher solid content naturally settles in the isolation settling pipe group 4 and sinks to the bottom of the isolation settling pipe group 4 until the slurry flows out of the isolation settling pipe group 4;
the supernatant liquid is left at the upper part of the isolation and sedimentation pipe group 4 and is automatically discharged out of the absorption tower by utilizing the height difference between the liquid level of the absorption tower and the isolation and sedimentation pipe group 4; the liquid level and water balance of the absorption tower are controlled by controlling the discharge amount of the supernatant.
The supernatant discharged from the absorption tower flows into a collection pit 6 after being led out by an outer tower collection pipe 5, and is pumped into a demisting and dedusting device washing water system 8 by a pump unit 7 for washing the demisting and dedusting device 3.
Specifically, the utility model discloses a concrete working process does:
referring to fig. 1, the lower region of the absorption tower is an absorption tower slurry tank 1, the solid content of the slurry inside the absorption tower is about 10% -25%, the slurry is in a uniform flowing state and does not naturally settle under the action of a side-feeding stirrer 2, isolation and sedimentation pipe groups 4 consisting of 8-16 isolation and sedimentation pipes with nominal diameters of 0.15m-0.4m are uniformly arranged in the circumferential direction and obliquely inserted into the absorption tower slurry tank 1, the vertical distance between the insertion point and the designed liquid level of the absorption tower is d1(d1 is 1.5m-2.0m), each isolation and sedimentation pipe is inserted into the absorption tower and then vertically folded to the bottom of the absorption tower, and the distance from the bottom of the absorption tower is d2(d2 is 1.0m-2.0 m). The slurry in each isolation settling tube cannot flow under the isolation action of the pipeline and naturally settles, the solid in the settled slurry can settle to the lower part of the isolation settling tube until the settled slurry flows out of the isolation settling tube, the supernatant liquid is remained at the upper part of the isolation settling tube and can be automatically discharged out of the absorption tower under the pressure action generated by the height difference between the liquid level of the absorption tower and the isolation settling tube, and the liquid level of the slurry tank 1 of the absorption tower can be lowered when the supernatant liquid flows out of the absorption tower, thereby being beneficial to the control of the water balance of the absorption tower;
the outer collecting pipe of tower 5 and isolation sedimentation nest of tubes 4 are in the absorption tower external connection, keep apart sedimentation nest of tubes 4 supernatant accessible outer collecting pipe of tower 5 and draw forth the absorption tower, consider that the lower requirement of satisfying defogging dust collector 3 to washing water quality of solid content of supernatant, newly build collection pit 6 and be used for the collection of supernatant, set up pump package 7 simultaneously and beat it in defogging dust collector wash water system 8 for the washing of defogging dust collector 3, wash with the replacement technology water.
The utility model is suitable for wet desulphurization, can effectively carry out solid-liquid separation on partial slurry in the slurry pool 1 of the absorption tower, discharge separated supernatant outside the absorption tower in time for secondary utilization, can effectively control the liquid level and water balance of the absorption tower, and avoid increasing the operation cost caused by increasing the discharge of desulphurization wastewater in order to control the liquid level and water balance of the absorption tower; meanwhile, the supernatant is collected to replace the process water for washing the demisting and dedusting device 3, so that the consumption of the part of process water is replaced, and a certain water-saving effect is achieved.
Claims (7)
1. A system for controlling the liquid level of an absorption tower is characterized by comprising an isolation sedimentation tube group (4) arranged in a pulp pool (1) of the absorption tower and an outer tower collecting tube (5) arranged outside the absorption tower;
the isolation settling tube group (4) comprises a plurality of isolation settling tubes; the isolation settling tubes are uniformly arranged along the circumferential direction of the absorption tower slurry tank (1), each isolation settling tube is obliquely inserted into the absorption tower slurry tank (1), is vertically folded towards the bottom of the absorption tower after being inserted into the absorption tower, and extends out of the top end of the absorption tower to be communicated with an outer tower collecting pipe (5).
2. The system for controlling the liquid level of the absorption tower as claimed in claim 1, wherein the top end of the isolation settling tube and the height of the collection tube (5) outside the tower are both lower than the designed liquid level of the absorption tower.
3. The system for controlling the liquid level of the absorption tower as claimed in claim 1, wherein the distance from the insertion point of each isolation settling tube into the pulp tank (1) of the absorption tower to the design liquid level of the absorption tower is 1.5m-2.0m, and the distance from the bottom end of each isolation settling tube to the bottom of the absorption tower is 1.0m-2.0 m.
4. The system for controlling the liquid level in an absorption tower according to claim 1, wherein the set of separation and settling legs (4) comprises 8-16 separation and settling legs.
5. The system of claim 1, wherein the nominal diameter of the single pipe of the settling leg is in the range of 0.15m to 0.5 m.
6. The system for controlling the liquid level of an absorption tower according to claim 1, further comprising a collection pit (6) disposed outside the absorption tower; the input end of the collecting pit (6) is connected with the collecting pipe (5) outside the tower.
7. A system for controlling the liquid level in an absorption tower according to claim 6, wherein the output end of the collecting pit (6) is connected with the input end of a flushing water system (8) of a defogging and dedusting device through a pump set (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022515947.XU CN213725663U (en) | 2020-11-03 | 2020-11-03 | System for controlling liquid level of absorption tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022515947.XU CN213725663U (en) | 2020-11-03 | 2020-11-03 | System for controlling liquid level of absorption tower |
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| CN213725663U true CN213725663U (en) | 2021-07-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112275096A (en) * | 2020-11-03 | 2021-01-29 | 西安西热锅炉环保工程有限公司 | System and method for controlling liquid level of absorption tower |
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- 2020-11-03 CN CN202022515947.XU patent/CN213725663U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112275096A (en) * | 2020-11-03 | 2021-01-29 | 西安西热锅炉环保工程有限公司 | System and method for controlling liquid level of absorption tower |
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