CN209797650U - zero-discharge system for waste water of gas power plant based on zero-pollution discharge of cooling tower - Google Patents
zero-discharge system for waste water of gas power plant based on zero-pollution discharge of cooling tower Download PDFInfo
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- CN209797650U CN209797650U CN201920501023.9U CN201920501023U CN209797650U CN 209797650 U CN209797650 U CN 209797650U CN 201920501023 U CN201920501023 U CN 201920501023U CN 209797650 U CN209797650 U CN 209797650U
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Abstract
The utility model discloses a gas power plant waste water zero release system based on zero blowdown of cooling tower, the export of inlet pipe, the export of calcium hydrate medicine system, the export of sodium carbonate medicine system and the export of coagulant medicine system are linked together with former water pretreatment systems's entry, former water pretreatment systems's export and export of sulphuric acid medicine system are linked together with the entry of boiler makeup water system and the water inlet of cooling tower bottom through pipeline and pipe back, the bottom export of cooling tower is linked together with the entry of bypass flow filtration system, the waste water export of boiler makeup water system is linked together with bypass flow filtration system's entry, bypass flow filtration system's export is linked together with the water inlet at cooling tower top, the export of water stabilizer medicine system is linked together with the water inlet at cooling tower bottom, this system can realize the zero release of gas power plant waste water.
Description
Technical Field
The utility model relates to a zero discharge system of waste water of gas power plant based on zero blowdown of cooling tower.
Background
National and local environmental protection policies strictly limit the water taking index, the discharged wastewater quantity and the water quality of a power plant, more and more thermal power plants require the design of 'zero discharge' of the wastewater of the whole plant, and the implementation of the zero discharge of the wastewater of the thermal power plants is in the trend. The water system for a recirculating cooling type gas power plant generally comprises: a circulating water system, a boiler water supply system and a life fire-fighting water system. The water system of the gas turbine power plant is single, the available reuse way of the waste water is few, and a waste water zero discharge system of the gas turbine power plant needs to be explored.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a gas power plant waste water zero discharge system based on zero blowdown of cooling tower, this system can realize the zero release of gas power plant waste water.
In order to achieve the aim, the zero-discharge system of the waste water of the gas power plant based on the zero-discharge of the cooling tower comprises a water inlet pipeline, a calcium hydroxide dosing system, a sodium carbonate dosing system, a coagulant dosing system, a raw water pretreatment system, a sulfuric acid dosing system, a boiler make-up water system, the cooling tower, a bypass flow filtering system and a water stabilizer dosing system;
The outlet of the water inlet pipeline, the outlet of the calcium hydroxide dosing system, the outlet of the sodium carbonate dosing system and the outlet of the coagulant dosing system are communicated with the inlet of the raw water pretreatment system, the outlet of the raw water pretreatment system and the outlet of the sulfuric acid dosing system are communicated with the inlet of the boiler water supply system and the water inlet at the bottom of the cooling tower through pipelines and pipes, the outlet at the bottom of the cooling tower is communicated with the inlet of the bypass flow filtering system, the waste water outlet of the boiler water supply system is communicated with the inlet of the bypass flow filtering system, the outlet of the bypass flow filtering system is communicated with the water inlet at the top of the cooling tower, and the outlet of the water stabilizer dosing system is communicated with the water inlet at the bottom.
the system is characterized by further comprising a sludge dewatering system, wherein an inlet of the sludge dewatering system is communicated with an outlet at the bottom of the raw water pretreatment system, and a supernatant outlet of the sludge dewatering system is communicated with an inlet of the raw water pretreatment system.
The domestic sewage pretreatment system is characterized by further comprising a domestic water system and a domestic sewage treatment system, wherein an outlet of the domestic water system is communicated with an inlet of the domestic sewage treatment system, and an outlet of the domestic sewage treatment system is communicated with an inlet of the raw water pretreatment system.
The water outlet at the bottom of the cooling tower is communicated with the inlet of the by-pass flow filtering system through a circulating water pump.
The utility model discloses following beneficial effect has:
Gas power plant waste water zero release system based on cooling tower zero blowdown when concrete operation, according to the characteristics of each system water of gas power plant, through the scale deposit type ion in the former pretreatment of water system removal sewage, then as the water source of circulating water system and boiler makeup water system to improve the concentrated multiplying power of circulating water by a wide margin, make the cooling tower zero release, and finally realize the purpose of gas power plant waste water zero release, simple structure, convenient operation, the practicality is extremely strong.
Furthermore, the wastewater generated by the domestic water system is treated and then recycled as source water, and the chemical wastewater generated by the boiler make-up water system is treated and then used as cooling tower make-up water, so that zero discharge of the wastewater of the whole plant is realized.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
wherein, 1 is a raw water pretreatment system, 2 is a sludge dewatering system, 3 is a boiler water supply system, 4 is a cooling tower, 5 is a bypass filtering system, 6 is a circulating water pump, 7 is a living water system, 8 is a living sewage treatment system, 9 is a calcium hydroxide dosing system, 10 is a sodium carbonate dosing system, 11 is a coagulant dosing system, 12 is a sulfuric acid dosing system, and 13 is a water stabilizer dosing system.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
Referring to fig. 1, the zero-emission system for waste water of a gas power plant based on zero-pollution discharge of a cooling tower of the present invention comprises a water inlet pipeline, a calcium hydroxide dosing system 9, a sodium carbonate dosing system 10, a coagulant dosing system 11, a raw water pretreatment system 1, a sulfuric acid dosing system 12, a boiler make-up water system 3, a cooling tower 4, a bypass filtering system 5 and a water stabilizer dosing system 13; an outlet of the water inlet pipeline, an outlet of the calcium hydroxide dosing system 9, an outlet of the sodium carbonate dosing system 10 and an outlet of the coagulant dosing system 11 are communicated with an inlet of the raw water pretreatment system 1, an outlet of the raw water pretreatment system 1 and an outlet of the sulfuric acid dosing system 12 are communicated with an inlet of the boiler feedwater system 3 and a water inlet at the bottom of the cooling tower 4 through pipelines and pipes, a bottom outlet of the cooling tower 4 is communicated with an inlet of the bypass flow filtering system 5, a wastewater outlet of the boiler feedwater system 3 is communicated with an inlet of the bypass flow filtering system 5, an outlet of the bypass flow filtering system 5 is communicated with a water inlet at the top of the cooling tower 4, and an outlet of the water stabilizer dosing system 13 is communicated with a water inlet at the bottom of the cooling tower 4.
The utility model discloses still include sludge dewatering system 2, wherein, sludge dewatering system 2's entry is linked together with former pretreatment of water system 1's bottom export, and sludge dewatering system 2's supernatant export is linked together with former pretreatment of water system 1's entry.
The utility model also comprises a domestic water system 7 and a domestic sewage treatment system 8, wherein the outlet of the domestic water system 7 is communicated with the inlet of the domestic sewage treatment system 8, and the outlet of the domestic sewage treatment system 8 is communicated with the inlet of the raw water pretreatment system 1; a water outlet at the bottom of the cooling tower 4 is communicated with an inlet of a bypass flow filtering system 5 through a circulating water pump 6.
The utility model discloses a concrete working process does:
The wastewater output by the water inlet pipeline enters a raw water pretreatment system 1, and hydrogen is generatedCalcium hydroxide output by a calcium oxide dosing system 9, sodium carbonate output by a sodium carbonate dosing system 10 and a coagulant output by a coagulant dosing system 11 enter a raw water pretreatment system 1, silicon and sulfate radicals in wastewater are removed through the calcium hydroxide, the alkalinity of the wastewater is reduced at the same time, calcium ions in the wastewater are removed through the sodium carbonate, the solid-liquid separation of the wastewater is realized through the coagulant, water output by the raw water pretreatment system 1 is mixed with sulfuric acid output by a sulfuric acid dosing system 12 and then is divided into two paths, wherein one path enters a boiler water supply system, the other path is used as make-up water of a cooling tower 4 to be mixed with a water stabilizer output by a water stabilizer dosing system 13 and then enters the cooling tower 4 through a water inlet at the bottom of the cooling tower 4, wherein the pH of the wastewater is adjusted to be between 7.5 and 8.0 through the sulfuric acid output by the sulfuric acid dosing system 12, and the alkalinity of the wastewater is reduced to be below 0.5, and 1/2Ca of the waste water2+The concentration is reduced to below 0.5 mmol/L;
Water output from the bottom of the cooling tower 4 enters the side-flow filtering system 5, wastewater output from the boiler feedwater system 3 enters the side-flow filtering system 5, and water output from the side-flow filtering system 5 enters the cooling tower 4 through a water inlet in the top of the cooling tower 4, so that zero-emission of wastewater of the gas power plant based on zero-pollution discharge of the cooling tower 4 is realized.
The water entering the raw water pretreatment system 1 comprises a production water source, supernatant of the sludge dewatering system 2 and treated domestic sewage.
Under the scale inhibition and corrosion prevention effects of the water stabilizer, the make-up water of the cooling tower 4 realizes the high concentration multiple rate of the circulating water system, no water catcher is arranged on the cooling tower 4, the low-chlorine-root circulating water has the concentration multiple of more than 15 times, zero pollution discharge is realized on the cooling tower 4, zero emission of the factory wastewater is realized, and the scale inhibition and corrosion of the circulating water system meet the requirements of the design Specification for treating industrial circulating cooling water (GB 50050 plus 2007); aiming at the problems that the cooling tower 4 is provided with a water catcher, the concentration ratio of the low-chlorine-root circulating water is more than 25 times, zero pollution discharge is realized on the cooling tower 4, the zero emission of the whole plant wastewater is realized, and the scale inhibition and corrosion of a circulating water system meet the requirements of the design specification for industrial circulating cooling water treatment (GB 50050-2007).
The domestic sewage output by the domestic sewage treatment system 8 is also treated by the raw water pretreatment system 1 and then recycled; and returning the supernatant fluid dehydrated by the sludge dehydration system 2 to the raw water pretreatment system 1 for treatment and recycling.
Claims (4)
1. A zero-discharge system of waste water of a gas power plant based on zero-pollution discharge of a cooling tower is characterized by comprising a water inlet pipeline, a calcium hydroxide dosing system (9), a sodium carbonate dosing system (10), a coagulant dosing system (11), a raw water pretreatment system (1), a sulfuric acid dosing system (12), a boiler water supply system (3), the cooling tower (4), a bypass filtering system (5) and a water stabilizer dosing system (13);
An outlet of the water inlet pipeline, an outlet of the calcium hydroxide dosing system (9), an outlet of the sodium carbonate dosing system (10) and an outlet of the coagulant dosing system (11) are communicated with an inlet of the raw water pretreatment system (1), an outlet of the raw water pretreatment system (1) and an outlet of the sulfuric acid dosing system (12) are communicated with an inlet of the boiler water supply system (3) and a water inlet at the bottom of the cooling tower (4) through pipelines and pipes, a bottom outlet of the cooling tower (4) is communicated with an inlet of the bypass flow filtering system (5), a wastewater outlet of the boiler water supply system (3) is communicated with an inlet of the bypass flow filtering system (5), an outlet of the bypass flow filtering system (5) is communicated with a water inlet at the top of the cooling tower (4), and an outlet of the water stabilizer dosing system (13) is communicated with a water inlet at the bottom of the cooling tower (4).
2. The zero-emission cooling tower pollution discharge-based gas power plant wastewater zero-discharge system is characterized by further comprising a sludge dewatering system (2), wherein an inlet of the sludge dewatering system (2) is communicated with a bottom outlet of the raw water pretreatment system (1), and a supernatant outlet of the sludge dewatering system (2) is communicated with an inlet of the raw water pretreatment system (1).
3. The zero-emission cooling tower-based gas power plant wastewater system according to claim 1, further comprising a domestic water system (7) and a domestic sewage treatment system (8), wherein an outlet of the domestic water system (7) is communicated with an inlet of the domestic sewage treatment system (8), and an outlet of the domestic sewage treatment system (8) is communicated with an inlet of the raw water pretreatment system (1).
4. the zero-emission cooling tower zero-pollution gas power plant wastewater system according to claim 1, wherein a water outlet at the bottom of the cooling tower (4) is communicated with an inlet of the bypass flow filtering system (5) through a circulating water pump (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920501023.9U CN209797650U (en) | 2019-04-12 | 2019-04-12 | zero-discharge system for waste water of gas power plant based on zero-pollution discharge of cooling tower |
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| CN201920501023.9U CN209797650U (en) | 2019-04-12 | 2019-04-12 | zero-discharge system for waste water of gas power plant based on zero-pollution discharge of cooling tower |
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| CN209797650U true CN209797650U (en) | 2019-12-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836000A (en) * | 2019-04-12 | 2019-06-04 | 西安西热水务环保有限公司 | A kind of plant gas wastewater zero discharge system and method based on cooling tower zero blowdown |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836000A (en) * | 2019-04-12 | 2019-06-04 | 西安西热水务环保有限公司 | A kind of plant gas wastewater zero discharge system and method based on cooling tower zero blowdown |
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