CN211854964U - Environment-friendly water-saving device for treating power plant wastewater by recycling chimney exhaust waste heat - Google Patents
Environment-friendly water-saving device for treating power plant wastewater by recycling chimney exhaust waste heat Download PDFInfo
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- CN211854964U CN211854964U CN202020380111.0U CN202020380111U CN211854964U CN 211854964 U CN211854964 U CN 211854964U CN 202020380111 U CN202020380111 U CN 202020380111U CN 211854964 U CN211854964 U CN 211854964U
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Abstract
The utility model discloses an environment-friendly water-saving device for treating power plant wastewater by recycling chimney exhaust waste heat, wherein the water coming from a circulating water return main pipe and other power plant wastewater account for 20-30t/h and are connected to the lower part of a heating tower, a smoke exhaust fan recycles and exhausts 85-100 ℃ exhaust smoke from a chimney into the lower part of the heating tower, the smoke heats the wastewater in the heating tower by adopting a bubbling heating device, the smoke transmits heat to the wastewater and then rises in the heating tower, the water vapor is cooled by a circulating water inlet main pipe to form condensed water which is completely recycled to a cooling tower water tank for reuse, and the sludge in the sludge tank can be used as soil for greening and crop planting or building construction backfill soil after being subjected to dehydration treatment; the method has the advantages of low investment, simple device system, less equipment, low operation cost, recycling of the waste heat of the discharged smoke from the chimney, economy, environmental protection, energy conservation and water conservation.
Description
Technical Field
The invention relates to the field of environmental protection, energy conservation and water conservation, in particular to an environmental protection and water conservation device for treating power plant wastewater by recovering chimney exhaust waste heat.
Background
The waste water of the thermal power plant mainly comprises: the process wastewater for preparing the desalted water, the flue gas desulfurization process wastewater and the bottom drainage of the circulating water cooling tower. The total amount of the waste water is about 20-30 t/h; the main characteristics of the waste water are: high hardness, large turbidity, large silt content, high silicon-calcium-magnesium plasma content and high chloride ion content. If the wastewater is not scientifically treated, the wastewater is difficult to recycle, the treatment load is increased when the wastewater is directly discharged into a sewage treatment plant, and the wastewater is difficult to treat or has high treatment cost in some conventional sewage treatment plants.
Aiming at the problem of waste water treatment, an energy-saving, environment-friendly and water-saving waste water treatment device is developed, and the purposes of treating waste water of a power plant and completely recycling the waste water to realize real zero emission on the premise of energy conservation, environment protection, water saving and economy are achieved.
This scheme adopts the female pipe of circulating water return water to come water and replaces cooling tower bottom drainage, and mainly because both compositions are close, can recycle the temperature rise of circulating water behind the steam turbine condenser moreover, can not need external power, directly utilize the pressure discharge of circulating water return water into the heating tower to save power consumptive.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides the environment-friendly water-saving device for treating the waste water of the power plant by recycling the waste heat of the smoke exhaust of the chimney, which has the advantages of low investment, simple device system, less equipment, low operation cost, recycling of the waste heat of the smoke exhaust of the chimney, waste material utilization, qualified and recycled waste water treatment, no pollution to the environment, economy, environment protection, energy saving and water saving.
In order to achieve the purpose, the invention adopts the following technical scheme:
an environment-friendly water-saving device for treating power plant wastewater by recovering chimney exhaust heat comprises
The system comprises a chimney, a wastewater inlet pipeline, a warming tower, an evaporation tower, a condenser and a cooling tower, wherein a flue gas inlet pipeline is arranged between the chimney and the bottom of the warming tower, the flue gas inlet pipeline is provided with a smoke exhaust fan and two electric valves, the warming tower receives wastewater entering from the wastewater inlet pipeline, flue gas transmitted by the flue gas inlet pipeline heats the wastewater in the warming tower through a bubbling heating device, the top of the warming tower is provided with a demister and the electric valves, and the demister discharges the treated flue gas into the chimney through a flue gas discharge pipeline;
be equipped with the hot-water pump between intensification tower and the evaporating tower, evaporating tower sub-unit connection has high-temperature steam pipeline and high-temperature steam electric valve, evaporating tower top connection water vapor pipeline discharges the condenser with vapor, the condenser is connected with the female pipe of circulating water intaking water pipeline, the condenser is connected with condensate water pipeline and discharges the whole recycle of cooling tower into with the comdenstion water, and the intensification tower bottom is equipped with first automatic mud valve, the evaporating tower bottom is equipped with the automatic mud valve of arranging of second, first automatic mud valve and the automatic mud valve of arranging of second are through arranging mud pipeline and mud pit UNICOM.
Preferably, the wastewater inlet pipeline comprises other wastewater inlet pipes and a water inlet pipeline of a circulating water return main pipe, circulating water in the circulating water return main pipe is heated after passing through a steam turbine condenser, and the other wastewater inlet pipelines and the water inlet pipeline of the circulating water return main pipe are both provided with electric valves.
Preferably, the temperature of the flue gas in the flue gas inlet pipeline is 85-100 ℃.
Preferably, the temperature of the steam in the high-temperature steam pipeline is 250-300 ℃, and the pressure is 1.6-1.8 MPa.
Preferably, the hot water pump pumps the waste water heated by the flue gas into the middle part of the evaporation tower in an atomization mode, and two ends of the hot water pump are provided with electric valves.
Preferably, the condenser is connected with a pipeline (72) from non-condensed gas to the steam turbine vacuum pump inlet and a pipeline from cooling water returning to the circulating water returning main pipe, and the pipeline from the non-condensed gas to the steam turbine vacuum pump inlet and the pipeline from the cooling water returning to the circulating water returning main pipe are both provided with electric valves.
Preferably, the first automatic mud discharging valve and the second automatic mud discharging valve are controlled by a program to be opened and closed at fixed intervals, and deposited mud is discharged into the mud pit.
Preferably, the sludge in the mud pit is used as soil for greening, crop planting or building construction backfill after dehydration treatment.
Preferably, the condenser is a tube condenser.
The invention has the beneficial technical effects that: the method has the advantages of low investment, simple device system, less equipment, low operation cost (low operation power consumption and steam consumption), recycling of the waste heat of the discharged smoke of the chimney, waste material recycling, qualified treatment of all waste water, realization of all recycling, no pollution to the environment, real realization of the goal of zero discharge of all waste water of the power plant, economy, environmental protection, energy saving and water saving, and obvious characteristics of economy, environmental protection, energy saving and water saving.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
in the figure: the system comprises a chimney 1, a wastewater inlet pipe 2, other wastewater inlet pipes 20, a circulating water return main pipe water inlet pipe 21, a heating tower 3, a flue gas discharge pipe 30, a demister 31, a first automatic mud valve 32, a bubbling heating device 33, a hot water pump 4, a mud pit 5, an evaporation tower 6, a steam pipe 61, a second automatic mud valve 62, a high-temperature steam pipe 63, a condenser 7, a circulating water inlet main pipe water inlet pipe 71, a non-condensing gas to steam turbine vacuum pump inlet pipe 72, a condensed water pipe 73, a cooling water return to circulating water return main pipe 74 and a cooling tower 8.
Detailed Description
The invention will be further described with reference to the accompanying drawings, which will serve to assist the public in understanding the invention, and the following description of the embodiments is not intended to limit the invention to the specific embodiments given by the applicant, and any changes in the definition of parts or features, or in the form of an overall structure, rather than essential changes, may be made to the invention as defined in the claims.
Examples
As shown in fig. 1: an environment-friendly water-saving device for treating power plant wastewater by recycling chimney exhaust waste heat comprises a chimney 1, a wastewater inlet pipeline 2, a warming tower 3, an evaporation tower 6, a condenser 7 and a cooling tower 8, wherein a flue gas inlet pipeline is arranged between the chimney and the bottom of the warming tower, the flue gas inlet pipeline is provided with a smoke exhaust fan and two electric valves, the warming tower receives wastewater entering from the wastewater inlet pipeline 2, flue gas transmitted by the flue gas inlet pipeline heats the wastewater in the warming tower through a bubbling heating device, the top of the warming tower is provided with a demister 31 and a demister rear flue gas electric valve, and the demister discharges the treated flue gas into the chimney through a flue gas discharge pipeline 30; be equipped with hot-water pump 4 between intensification tower and the evaporating tower 6, the evaporating tower sub-unit connection has high-temperature steam pipeline 63 and high-temperature steam electric valve, evaporating tower top connection vapor pipeline 61 is gone into condenser 7 with vapor, the condenser is connected with circulating water female pipe water inlet pipeline 71, the condenser is connected with condensate pipe 73, it utilizes to discharge the whole recycles of cooling tower 8 with the comdenstion water, the bottom of the intensification tower is equipped with first automatic mud valve 32, the evaporating tower bottom is equipped with the automatic mud valve 62 of second, first automatic mud valve 32 and the automatic mud valve 62 of second link through mud pipe and mud pit 5.
The waste water inlet pipeline 2 comprises other waste water inlet pipes 20 and a circulating water return main pipe water inlet pipeline 21, circulating water in the circulating water return main pipe is heated up after passing through a steam turbine condenser, and the other waste water inlet pipelines and the circulating water return main pipe water inlet pipeline are all provided with electric valves. This scheme adopts the female pipe of circulating water return water to come water and replaces cooling tower bottom drainage, and mainly because both compositions are close, can recycle the temperature rise of circulating water behind the steam turbine condenser moreover, can not need external power, directly utilize the pressure discharge of circulating water return water into the heating tower to save power consumptive.
The flow of the water coming from the circulating water return main pipe and other power plant waste water is 20-30t/h in total, the water is connected to the lower part of the warming tower, a smoke exhaust fan recovers and exhausts the exhaust smoke at 85-100 ℃ from a chimney into the lower part of the warming tower, the smoke heats the waste water in the warming tower by adopting a bubbling heating device, the smoke transmits heat to the waste water, then the waste water rises in the warming tower and continues to rise by virtue of the draught effect of the chimney, a small amount of micro water mist in the smoke is removed by a demister at the top of the warming tower, then the smoke returns to the chimney to reach the standard and is exhausted, and sludge deposited at the bottom of the warming tower is periodically discharged into a sludge.
The hot water pump 4 pumps the waste water heated by the flue gas into the middle part of the evaporation tower 6 in an atomization mode, high-temperature steam with the pressure of 1.6-1.8MPa and the temperature of 250-300 ℃ is atomized and sprayed from the lower part of the evaporation tower, and the high-temperature steam in the evaporation tower evaporates all the atomized waste water into water vapor at high temperature. Sludge deposited at the bottom of the evaporation tower is periodically discharged into a lower sludge tank 5 by a second automatic sludge discharge valve at the bottom under the program control.
The vapor at the top of the evaporation tower is discharged into a tubular condenser 7, the vapor is cooled into condensed water by a circulating water inlet main pipe, all the condensed water is recycled to a water tank of a cooling tower 8 for reuse, the circulating cooling water of the condenser returns to a circulating water return main pipe, and non-condensable gas in the condenser is connected into an inlet of a steam turbine vacuum pump and is pumped away by the steam turbine vacuum pump.
The condenser is connected with a pipeline 72 from non-condensed gas to the inlet of the steam turbine vacuum pump and a pipeline 74 from cooling water to a main pipe of circulating water return, and the pipeline 74 from the non-condensed gas to the inlet of the steam turbine vacuum pump 72 and from the cooling water to the main pipe of circulating water return are provided with electric valves.
The sludge in the slurry tank 5 can be used as soil for greening, crop planting or building construction backfill after being subjected to dehydration treatment.
The wastewater treatment device is characterized in that: the method has the advantages of low investment, simple device system, less equipment, low operation cost (low operation power consumption and steam consumption), recycling of the waste heat of the discharged smoke from the chimney, waste material recycling, qualified treatment of all waste water, realization of all recycling, no pollution to the environment, real realization of the goal of zero discharge of all waste water in the power plant, economy, environmental protection, energy saving and water saving, and obvious advantages of economy, environmental protection, energy saving and water saving.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the invention be considered as within the following claims.
Claims (9)
1. The utility model provides a retrieve environmental protection water saving fixtures that chimney discharged fume waste heat treatment power plant waste water, includes chimney (1), waste water inlet pipe (2), intensification tower (3), evaporating tower (6), condenser (7) and cooling tower (8), its characterized in that: a flue gas inlet pipeline is arranged between the chimney and the bottom of the warming tower, the flue gas inlet pipeline is provided with a smoke exhaust fan and two electric valves, the warming tower receives wastewater entering from a wastewater inlet pipeline (2), flue gas transmitted by the flue gas inlet pipeline heats the wastewater in the warming tower through a bubbling heating device (33), a demister (31) and the electric valves are arranged at the top of the warming tower, and the demister discharges the treated flue gas into the chimney through a flue gas discharge pipeline (30);
be equipped with hot-water pump (4) between intensification tower (3) and evaporating tower (6), evaporating tower sub-unit connection has high-temperature steam pipeline (63) and high-temperature steam electric valve, evaporating tower top connection water vapor pipeline (61) and water vapor electric valve, water vapor pipeline exit linkage condenser (7), the condenser is connected with circulating water main pipe water inlet pipeline (71), the condenser is connected with condensed water pipeline (73) and arranges the whole recycle of cooling tower (8) with the comdenstion water, and the intensification tower bottom is equipped with first automatic mud valve (32), the evaporating tower bottom is equipped with automatic mud valve (62) of second, first automatic mud valve (32) and automatic mud valve (62) of second are through mud pipe and mud pit (5) UNICOM.
2. The environment-friendly water saving device for recovering the waste heat of the discharged smoke of the chimney to treat the waste water of the power plant as claimed in claim 1, wherein the waste water inlet pipeline (2) comprises other waste water inlet pipes (20) and a circulating water return main pipe water inlet pipeline (21), the circulating water in the circulating water return main pipe is heated after passing through a steam turbine condenser, and the other waste water inlet pipes and the circulating water return main pipe water inlet pipeline are both provided with electric valves.
3. The environment-friendly water saving device for treating the power plant wastewater by recycling the waste heat of the discharged smoke of the chimney as claimed in claim 1, wherein the temperature of the smoke in the smoke inlet pipeline is 85-100 ℃.
4. The environment-friendly water saving device for recovering the waste heat of the exhausted smoke of the chimney to treat the waste water of the power plant as claimed in claim 1, wherein the temperature of the steam in the high-temperature steam pipeline (63) is 250 ℃ and 300 ℃, and the pressure is 1.6-1.8 MPa.
5. The environment-friendly water saving device for recovering the chimney exhaust smoke waste heat to treat the power plant wastewater according to claim 1 or 4, characterized in that the hot water pump (4) pumps the wastewater heated by the flue gas into the middle part of the evaporation tower in an atomizing manner, and two ends of the hot water pump are provided with electric valves.
6. The environment-friendly water saving device for recovering the waste heat of the discharged smoke of the chimney to treat the waste water of the power plant according to the claim 1, wherein the condenser is connected with a pipeline (72) from the non-condensed gas to the steam turbine vacuum pump and a pipeline (74) from the cooling water to the circulating water return main pipe, and the pipeline (74) from the non-condensed gas to the steam turbine vacuum pump and the pipeline (72) from the cooling water to the circulating water return main pipe are both provided with electric valves.
7. The environment-friendly water saving device for recovering the waste heat of the discharged smoke of the chimney to treat the waste water of the power plant as claimed in claim 1, wherein the first automatic mud valve (32) and the second automatic mud valve (62) are controlled by a program to be opened and closed at fixed intervals to discharge deposited mud into the mud pit (5).
8. The environment-friendly water saving device for recovering the waste heat of the discharged smoke of the chimney to treat the wastewater of the power plant as claimed in claim 7, wherein the sludge in the sludge pond (5) can be used as soil for greening, crop planting or building construction backfill after dehydration treatment.
9. The environment-friendly water-saving device for recovering the waste heat of the exhausted smoke of the chimney to treat the wastewater of the power plant as claimed in claim 1, wherein the condenser (7) is a tubular condenser.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020380111.0U CN211854964U (en) | 2020-03-24 | 2020-03-24 | Environment-friendly water-saving device for treating power plant wastewater by recycling chimney exhaust waste heat |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020380111.0U CN211854964U (en) | 2020-03-24 | 2020-03-24 | Environment-friendly water-saving device for treating power plant wastewater by recycling chimney exhaust waste heat |
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| CN202020380111.0U Active CN211854964U (en) | 2020-03-24 | 2020-03-24 | Environment-friendly water-saving device for treating power plant wastewater by recycling chimney exhaust waste heat |
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