CN209456107U - A kind of sea water desulfuration thermal power plant tail end wastewater processing system - Google Patents
A kind of sea water desulfuration thermal power plant tail end wastewater processing system Download PDFInfo
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- CN209456107U CN209456107U CN201920035700.2U CN201920035700U CN209456107U CN 209456107 U CN209456107 U CN 209456107U CN 201920035700 U CN201920035700 U CN 201920035700U CN 209456107 U CN209456107 U CN 209456107U
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Abstract
The utility model discloses a kind of sea water desulfuration thermal power plant tail end wastewater processing systems, including Secondary Air heat source system, high-temperature heat-exchanging, raw water box, pretreatment system, primary heater, the first evaporator, the first condensation water tank, secondary heater, the first separator, secondary heater, the second condensation water tank, the second evaporator, crystallizer, condensation water tank and cryogenic heat exchanger, which can be realized the zero-emission of sea water desulfuration thermal power plant tail end wastewater.
Description
Technical field
The utility model relates to a kind of thermal power plant's tail end wastewater processing systems, and in particular to a kind of sea water desulfuration thermal power plant end
Hold waste water treatment system.
Background technique
Coastal Power Plant is typically provided seawater desalination system, and the water that produces after sea water desalination is used as the production and living of full factory
Water, desulphurization system use Deuslfurizing system for sea water, and all kinds of waste water are categorized to be collected, after dual treatment, tail end wastewater generally only remain from
Son exchange regenerative wastewater, uses " sulfuric acid-sodium hydroxide " as the precision processing regenerative wastewater leading ion of regenerative agent for Na+、NH4 +
And SO4 2-, use " hydrochloric acid-sodium hydroxide " as the precision processing regenerative wastewater leading ion of regenerative agent for Na+、NH4 +And Cl-, do not have
There is scale-forming ion, for requiring the sea water desulfuration thermal power plant of wastewater zero discharge, needs to design a kind of waste water treatment system, the system
It can be realized the zero-emission of sea water desulfuration thermal power plant tail end wastewater.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts provides a kind of sea water desulfuration thermal power plant end
Waste water treatment system is held, which can be realized the zero-emission of sea water desulfuration thermal power plant tail end wastewater.
In order to achieve the above objectives, sea water desulfuration thermal power plant tail end wastewater processing system described in the utility model includes secondary
Wind heat source system, high-temperature heat-exchanging, raw water box, pretreatment system, primary heater, the first evaporator, the first condensation water tank,
Two heaters, the first separator, secondary heater, the second condensation water tank, the second evaporator, crystallizer, condensation water tank and low temperature
Heat exchanger；
The outlet of Secondary Air heat source system is connected with the thermal medium entrance of high-temperature heat-exchanging, the thermal medium of high-temperature heat-exchanging
Outlet is connected with the entrance of Secondary Air heat source system, the cold medium of the outlet preprocessed system and primary heater of raw water box
Entrance is connected, and the cold medium outlet of primary heater is connected with the water inlet of the first evaporator, the condensation of primary heater
Liquid outlet is connected with the water inlet of the first condensation water tank, the outlet of the first condensation water tank and the cold medium entrance of high-temperature heat-exchanging
It is connected, the cold medium outlet of high-temperature heat-exchanging is connected with the thermal medium entrance of primary heater, the first base of evaporator
Water outlet is connected with the cold medium entrance of the cold medium entrance of primary heater and secondary heater, at the top of the first evaporator
Steam (vapor) outlet is connected through the first separator with the thermal medium entrance of secondary heater, the thermal medium outlet of secondary heater and the
The water inlet of two condensation water tanks is connected；
The cold medium outlet of secondary heater is connected with the water inlet of the second evaporator, the water outlet of the second base of evaporator
Mouthful it is connected with the entrance of the cold medium entrance of secondary heater and crystallizer, the condensate outlet of crystallizer and condensation water tank
Entrance is connected, and the steam (vapor) outlet at the top of the second evaporator is connected through the second separator with the thermal medium entrance of cryogenic heat exchanger
Logical, the thermal medium outlet of cryogenic heat exchanger is connected with the entrance of condensation water tank.
It further include that cooling comes waterpipe and cooling backwater pipeline, wherein cooling carrys out cold Jie of waterpipe and cryogenic heat exchanger
Matter entrance is connected, and cooling backwater pipeline is connected with the outlet of the cold medium of cryogenic heat exchanger.
The Secondary Air heat source system includes pressure fan, air preheater, stokehold secondary air box and boiler, wherein air-supply
The outlet of machine is connected with the entrance of air preheater, the outlet of air preheater and the thermal medium entrance and furnace of high-temperature heat-exchanging
The hot air inlet of preceding secondary air box is connected, and the hot air outlet of stokehold secondary air box is connected with the Secondary Air entrance of boiler
Logical, the thermal medium outlet of high-temperature heat-exchanging is connected with the entrance of air preheater.
The pretreatment system includes deamination unit, intermediate water tank and waste water delivery pump, wherein the outlet of raw water box is successively
It is connected through deamination unit, intermediate water tank and waste water delivery pump with the cold medium entrance of primary heater.
It further include first circulation pump, wherein the outlet of the entrance and waste water delivery pump of first circulation pump and the first evaporator
The water outlet of bottom is connected, and the outlet of first circulation pump is connected with the cold medium entrance of primary heater.
It further include second circulation pump, wherein the entrance of second circulation pump and the water outlet and second of the first base of evaporator
The water outlet of base of evaporator is connected, and the outlet of second circulation pump is connected with the cold medium entrance of secondary heater.
The utility model has the following beneficial effects:
Sea water desulfuration thermal power plant tail end wastewater processing system described in the utility model is when specific operation, with secondary wind-heat
Heat source when the hot Secondary Air of source system output is concentrated as sea water desulfuration thermal power plant tail end wastewater, heat is high, and thickening efficiency
Height, while the utility model is concentrated by the way of secondary concentration, is then crystallized, wherein concentration and crystallization process
The condensed water of middle generation enters in condensate tank, and it is straight that the high pure sodium chloride or sodium sulphate that crystallization process generates can be used as product
Output is connect, is worth higher.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Wherein, 1 it is pressure fan, 2 be air preheater, 3 be stokehold secondary air box, 4 be boiler, 5 is high-temperature heat-exchanging, 6
It is deamination unit for raw water box, 7,8 be intermediate water tank, 9 be waste water delivery pump, 10 be primary heater, 11 is the first condensed water
Case, 12 be first circulation pump, 13 be the first evaporator, 14 be the first separator, 15 be secondary heater, 16 be the second condensed water
Case, 17 be second circulation pump, 18 be the second evaporator, 19 be the second separator, 20 be cryogenic heat exchanger, 21 be condensation water tank,
22 be it is cooling come waterpipe, 23 be cooling backwater pipeline, 24 be crystallizer.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, sea water desulfuration thermal power plant tail end wastewater processing system described in the utility model includes Secondary Air heat source
System, high-temperature heat-exchanging 5, raw water box 6, pretreatment system, primary heater 10, the first evaporator 13, the first condensation water tank 11,
Secondary heater 15, the first separator 14, secondary heater 15, the second condensation water tank 16, the second evaporator 18, crystallizer 24,
Condensation water tank 21 and cryogenic heat exchanger 20；The outlet of Secondary Air heat source system is connected with the thermal medium entrance of high-temperature heat-exchanging 5,
The thermal medium outlet of high-temperature heat-exchanging 5 is connected with the entrance of Secondary Air heat source system, the preprocessed system in the outlet of raw water box 6
It is connected with the cold medium entrance of primary heater 10, the water inlet of the cold medium outlet and the first evaporator 13 of primary heater 10
Mouth is connected, and the condensate outlet of primary heater 10 is connected with the water inlet of the first condensation water tank 11, the first condensation water tank
11 outlet is connected with the cold medium entrance of high-temperature heat-exchanging 5, cold medium outlet and the primary heater 10 of high-temperature heat-exchanging 5
Thermal medium entrance be connected, the water outlet of 13 bottom of the first evaporator and the cold medium entrance of primary heater 10 and second plus
The cold medium entrance of hot device 15 is connected, and the steam (vapor) outlet at 13 top of the first evaporator is through the first separator 14 and secondary heater
15 thermal medium entrance is connected, and the thermal medium outlet of secondary heater 15 is connected with the water inlet of the second condensation water tank 16；
The cold medium outlet of secondary heater 15 is connected with the water inlet of the second evaporator 18, the water outlet of 18 bottom of the second evaporator
It is connected with the entrance of the cold medium entrance of secondary heater 15 and crystallizer 24, the condensate outlet and condensed water of crystallizer 24
The entrance of case 21 is connected, and the steam (vapor) outlet at 18 top of the second evaporator is situated between through the heat of the second separator 19 and cryogenic heat exchanger 20
Matter entrance is connected, and the thermal medium outlet of cryogenic heat exchanger 20 is connected with the entrance of condensation water tank 21.
The utility model further include it is cooling come waterpipe 22 and cooling backwater pipeline 23, wherein it is cooling come waterpipe 22 with
The cold medium entrance of cryogenic heat exchanger 20 is connected, and cooling backwater pipeline 23 is connected with the outlet of the cold medium of cryogenic heat exchanger 20
It is logical.
The Secondary Air heat source system includes pressure fan 1, air preheater 2, stokehold secondary air box 3 and boiler 4, wherein
The outlet of pressure fan 1 is connected with the entrance of air preheater 2, the outlet of air preheater 2 and the thermal medium of high-temperature heat-exchanging 5
Entrance and the hot air inlet of stokehold secondary air box 3 are connected, and the hot air outlet of stokehold secondary air box 3 is secondary with boiler 4
Wind entrance is connected, and the thermal medium outlet of high-temperature heat-exchanging 5 is connected with the entrance of air preheater 2.
The pretreatment system includes deamination unit 7, intermediate water tank 8 and waste water delivery pump 9, wherein the outlet of raw water box 6
Successively it is connected through deamination unit 7, intermediate water tank 8 and waste water delivery pump 9 with the cold medium entrance of primary heater 10.
The utility model further includes first circulation pump 12, wherein the entrance of first circulation pump 12 and going out for waste water delivery pump 9
Mouth and the water outlet of 13 bottom of the first evaporator are connected, and the outlet of first circulation pump 12 and the cold medium of primary heater 10 enter
Mouth is connected.
The utility model further includes second circulation pump 17, wherein 13 bottom of entrance and the first evaporator of second circulation pump 17
The water outlet of 18 bottom of the water outlet in portion and the second evaporator is connected, outlet and the secondary heater 15 of second circulation pump 17
Cold medium entrance is connected.
The specific work process of the utility model are as follows:
The preprocessed system of the sea water desulfuration thermal power plant tail end wastewater that raw water box 6 exports removes NH4 +After enter first plus
It in hot device 10, and is heated using the hot Secondary Air that Secondary Air heat source system exports as heat source, then into the first evaporator
Initial concentration in 13, the sea water desulfuration thermal power plant tail end wastewater after initial concentration carry out steam-water separation through the first separator 14,
In, the water that the first separator 14 is separated is fallen in the first evaporator 13, and the moisture of 13 bottom of the first evaporator output is
Two-way is heated wherein entering in primary heater 10 as cold medium all the way, and another way enters secondary heater 15
In, the high-temperature steam that the first separator 14 is separated enters in secondary heater 15 as heat source, and to secondary heater
The sea water desulfuration thermal power plant tail end wastewater of initial concentration is heated in 15, the sea water desulfuration thermal power plant of the initial concentration after heating
Tail end wastewater then enters in the second evaporator 18 and carries out steam-water separation, wherein the water separated falls to the second evaporator
In 18, the steam separated enters in condensation water tank 21 after being condensed into condensed water by cryogenic heat exchanger 20, the second evaporation
The concentrate of 18 bottom of device output is divided into two-way, is heated wherein entering in secondary heater 15 as cold medium all the way,
The crystallized device 24 of another way is solidified, and the water generated in 24 solidification process of crystallizer enters in condensation water tank 21.
It should be noted that the second separator 19 is separated using seawater as cold source the steam of cryogenic heat exchanger 20 into
Row condensation.In addition, sea water desulfuration thermal power plant tail end wastewater only remains ion exchange regenerant waste water, predominantly Na+、NH4 +And Cl-(or
SO4 2-), NH is removed through deamination unit 74 +Afterwards, Na is only remained+And Cl-(or SO4 2-), deamination unit 7 includes stripping process, stripping work
Skill or degassing membrane process, but it is not limited to above several techniques.
The above is only the citing of the implementation steps of the utility model, it is noted that for the common of the art
For technical staff, without deviating from the technical principle of the utility model, several improvements and modifications can also be made, these
Improvement and modification also should be regarded as the protection scope of the utility model.
Claims (6)
1. a kind of sea water desulfuration thermal power plant tail end wastewater processing system, which is characterized in that changed including Secondary Air heat source system, high temperature
Hot device (5), raw water box (6), pretreatment system, primary heater (10), the first evaporator (13), the first condensation water tank (11),
Secondary heater (15), the first separator (14), secondary heater (15), the second condensation water tank (16), the second evaporator (18),
Crystallizer (24), condensation water tank (21) and cryogenic heat exchanger (20)；
The outlet of Secondary Air heat source system is connected with the thermal medium entrance of high-temperature heat-exchanging (5), and the heat of high-temperature heat-exchanging (5) is situated between
Matter outlet is connected with the entrance of Secondary Air heat source system, the preprocessed system in outlet and primary heater of raw water box (6)
(10) cold medium entrance is connected, and the cold medium outlet of primary heater (10) is connected with the water inlet of the first evaporator (13)
Logical, the condensate outlet of primary heater (10) is connected with the water inlet of the first condensation water tank (11), the first condensation water tank
(11) outlet is connected with the cold medium entrance of high-temperature heat-exchanging (5), and the cold medium outlet of high-temperature heat-exchanging (5) adds with first
The thermal medium entrance of hot device (10) is connected, the water outlet of the first evaporator (13) bottom and the cold medium of primary heater (10)
The cold medium entrance of entrance and secondary heater (15) is connected, and the steam (vapor) outlet at the top of the first evaporator (13) is through the first separation
Device (14) is connected with the thermal medium entrance of secondary heater (15), the thermal medium outlet of secondary heater (15) and the second condensation
The water inlet of water tank (16) is connected；
The cold medium outlet of secondary heater (15) is connected with the water inlet of the second evaporator (18), the second evaporator (18) bottom
The water outlet in portion is connected with the entrance of the cold medium entrance of secondary heater (15) and crystallizer (24), crystallizer (24) it is cold
Condensate outlet is connected with the entrance of condensation water tank (21), and the steam (vapor) outlet at the top of the second evaporator (18) is through the second separator
(19) it is connected with the thermal medium entrance of cryogenic heat exchanger (20), the thermal medium outlet and condensation water tank of cryogenic heat exchanger (20)
(21) entrance is connected.
2. sea water desulfuration thermal power plant tail end wastewater processing system according to claim 1, which is characterized in that further include cooling
Come waterpipe (22) and cooling backwater pipeline (23), wherein cooling carrys out the cold medium of waterpipe (22) and cryogenic heat exchanger (20)
Entrance is connected, and cooling backwater pipeline (23) is connected with the outlet of the cold medium of cryogenic heat exchanger (20).
3. sea water desulfuration thermal power plant tail end wastewater processing system according to claim 1, which is characterized in that the Secondary Air
Heat source system includes pressure fan (1), air preheater (2), stokehold secondary air box (3) and boiler (4), wherein pressure fan (1)
Outlet is connected with the entrance of air preheater (2), and the outlet of air preheater (2) and the thermal medium of high-temperature heat-exchanging (5) enter
Mouth and the hot air inlet of stokehold secondary air box (3) are connected, hot air outlet and boiler (4) of stokehold secondary air box (3)
Secondary Air entrance is connected, and the thermal medium outlet of high-temperature heat-exchanging (5) is connected with the entrance of air preheater (2).
4. sea water desulfuration thermal power plant tail end wastewater processing system according to claim 1, which is characterized in that the pretreatment
System includes deamination unit (7), intermediate water tank (8) and waste water delivery pump (9), wherein the outlet of raw water box (6) is successively through deamination
Unit (7), intermediate water tank (8) and waste water delivery pump (9) are connected with the cold medium entrance of primary heater (10).
5. sea water desulfuration thermal power plant tail end wastewater processing system according to claim 4, which is characterized in that further include first
Circulating pump (12), wherein first circulation pumps the entrance of (12) and the outlet and the first evaporator (13) bottom of waste water delivery pump (9)
Water outlet be connected, first circulation pump (12) outlet be connected with the cold medium entrance of primary heater (10).
6. sea water desulfuration thermal power plant tail end wastewater processing system according to claim 5, which is characterized in that further include second
Circulating pump (17), wherein second circulation pumps the entrance of (17) and the water outlet and the second evaporator of the first evaporator (13) bottom
(18) water outlet of bottom is connected, and the outlet of second circulation pump (17) is connected with the cold medium entrance of secondary heater (15)
It is logical.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109534425A (en) * | 2019-01-09 | 2019-03-29 | 西安西热水务环保有限公司 | A kind of sea water desulfuration thermal power plant tail end wastewater processing system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109534425A (en) * | 2019-01-09 | 2019-03-29 | 西安西热水务环保有限公司 | A kind of sea water desulfuration thermal power plant tail end wastewater processing system and method |
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