CN111911940A - Waste water treatment recycling system after sludge is mixed and burned in boiler of thermal power plant - Google Patents
Waste water treatment recycling system after sludge is mixed and burned in boiler of thermal power plant Download PDFInfo
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- CN111911940A CN111911940A CN202010972168.4A CN202010972168A CN111911940A CN 111911940 A CN111911940 A CN 111911940A CN 202010972168 A CN202010972168 A CN 202010972168A CN 111911940 A CN111911940 A CN 111911940A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/12—Sludge, slurries or mixtures of liquids
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a thermal power plant boiler sludge blending post-treatment and recycling system, which comprises a coal-fired coupling sludge blending treatment part, a wastewater extraction part and a wastewater treatment and recycling part, wherein the coal-fired coupling sludge blending treatment part is provided with a front carbonization integrated sludge treatment device, the wastewater extraction part comprises a power plant boiler combustion evaporation device and a desulfurization absorption tower condensation collection device, and water increased by sludge blending is extracted from saturated flue gas at an outlet of a separation and absorption tower; this patent is for adopting under leading dry carbonization treatment integration municipal sludge treatment equipment technology, complete municipal sludge contains water and gets into the absorption process behind the power plant, has realized that the water-containing extraction of mud, purification, concentration, retrieve complete process systems such as fresh water, salt water separation solidification realize that coal-fired coupling mud mixes and burns supporting waste water treatment, and process flow is simple to realize handling back product water retrieval and utilization, the zero release of waste water is realized to dense water.
Description
Technical Field
The invention relates to a sludge treatment technology, in particular to a system for treating and recycling waste water generated after sludge is mixed in a boiler of a thermal power plant.
Background
In recent years, the coal-fired power plant utilizes the advantages of high combustion temperature of a hearth, long retention time and the like of a liquid slag-off boiler, implements sludge co-combustion modification so as to further fulfill the social responsibility of enterprises and increase the operational benefits of the enterprises, and simultaneously fully plays the roles of reducing, harmlessly recycling and treating the municipal sludge by a stock unit in a large scale.
However, because the sludge contains a large amount of water, the mixed combustion of the sludge can bring a large amount of water vapor into the original flue gas, so that the content of the water vapor in the original flue gas is increased, the water balance of a desulfurization system is further influenced, the evaporation water amount of the desulfurization system is reduced, and the condensate amount is increased, according to the accounting, the discharge amount of the wastewater is increased by 17.6m3/h under the condition that the two 300MV units treat 500T sludge every day, and the increase of the wastewater discharge can influence a high-salinity wastewater zero-discharge system of the whole plant.
The high-salt wastewater is not prepared by a simple and feasible method with low cost at home and abroad, and the common treatment methods mainly comprise vapor compression condensation and biochemical treatment. The steam compression and condensation has extremely high requirements on the material of equipment, consumes a large amount of heat in operation, and has high one-time investment and operation cost.
The biochemical treatment usually runs under low salt concentration, and needs to be diluted when the salt concentration is high, so that the waste of water resources is caused.
Disclosure of Invention
The invention aims to provide a system for treating and recycling waste water generated after sludge is mixed in a boiler of a thermal power plant, and aims to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a thermal power plant boiler mixes and burns behind mud waste water treatment recycling system, including coal-fired coupling mud mixes and burns processing section, waste water extraction part and waste water treatment recycling part, the said coal-fired coupling mud mixes and burns processing section and has integrated mud treatment facility of leading carbonization, the said waste water extraction part includes boiler burning evaporation equipment of the power plant and desulfurization absorption tower condensation collecting equipment, adopt and separate from and absorb the moisture that increases of burning in mud in the tower outlet saturated flue gas; the waste water treatment recycling part comprises waste water flocculation clarification pretreatment equipment, waste water low-temperature double-effect thermal method concentration treatment equipment and waste water boiler flue gas bypass evaporation treatment equipment, the waste water flocculation clarification pretreatment equipment adopts an integrated high-efficiency clarifier to realize waste water standard treatment including first-class pollutants, the waste water low-temperature double-effect thermal method concentration treatment equipment adopts a thermal method concentration reduction device to realize concentration and separation of the waste water, and the waste water boiler flue gas bypass evaporation treatment equipment adopts a bypass flue evaporation device to realize drying and solidification of the separated concentrated water.
The preposed carbonization integrated sludge treatment equipment, the power station boiler combustion evaporation equipment, the desulfurization absorption tower condensation and collection equipment, the wastewater flocculation clarification pretreatment equipment, the wastewater low-temperature double-effect thermal method concentration treatment equipment and the wastewater boiler flue gas bypass evaporation treatment equipment are sequentially connected; the integrated efficient clarifier is divided into a primary reaction area, a secondary reaction area and a clarification area, desulfurization wastewater firstly enters the primary reaction area for reaction, lime medicament is added into the primary reaction area, the desulfurization wastewater enters the secondary reaction area for continuous reaction after the reaction is finished, flocculant medicament is added into the secondary reaction area, effluent of the secondary reactor enters the clarification area for solid-liquid separation, each area is provided with a stirrer, different areas are blocked by baffles, and water enters adjacent areas through overflow; the utility boiler combustion and evaporation equipment comprises a boiler furnace and an SCR denitration device, the desulfurization absorption tower condensation collecting equipment comprises a dust removal device and a desulfurization device, and an air preheater is connected between the utility boiler combustion and evaporation equipment and the desulfurization absorption tower condensation collecting equipment.
As a preferred embodiment of the present invention: the low-temperature double-effect thermal method concentration treatment equipment for the wastewater comprises a first-effect heater, a first-effect cooler, a second-effect heater and a second-effect cooler which are sequentially connected.
Compared with the prior art, the invention has the beneficial effects that: this patent is for adopting under leading dry carbonization treatment integration municipal sludge treatment equipment technology, complete municipal sludge contains water and gets into the absorption process behind the power plant, has realized that the water-containing extraction of mud, purification, concentration, retrieve complete process systems such as fresh water, salt water separation solidification realize that coal-fired coupling mud mixes and burns supporting waste water treatment, and process flow is simple to realize handling back product water retrieval and utilization, the zero release of waste water is realized to dense water.
Drawings
Fig. 1 is an overall system block diagram of the present system.
FIG. 2 is a schematic diagram of the connection between the combustion evaporation equipment of the utility boiler and the condensation collection equipment of the desulfurization absorption tower in the system.
FIG. 3 is a main structure diagram of the low-temperature double-effect thermal concentration treatment equipment for wastewater in the system.
In the figure, 1-front carbonization integrated sludge treatment equipment, 2-power station boiler combustion evaporation equipment, 3-desulfurization absorption tower condensation collection equipment, 4-wastewater flocculation clarification pretreatment equipment, 5-wastewater low-temperature double-effect thermal method concentration treatment equipment, 6-wastewater boiler flue gas bypass evaporation treatment equipment, 7-boiler furnace, 8-SCR denitration device, 9-air preheater, 10-dust removal device, 11-desulfurization device, 12-first-effect heater, 13-first-effect cooler, 14-second-effect heater and 15-second-effect cooler are adopted.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 1-2, a thermal power plant boiler sludge blending post-treatment and recycling system for wastewater comprises a coal-fired coupled sludge blending treatment part, a wastewater extraction part and a wastewater treatment and recycling part, wherein the coal-fired coupled sludge blending treatment part is provided with a front carbonization integrated sludge treatment device 1, the wastewater extraction part comprises a power plant boiler combustion and evaporation device 2 and a desulfurization absorption tower condensation and collection device 3, and water increased by sludge blending is extracted from saturated flue gas separated from an outlet of an absorption tower; the wastewater treatment and recycling part comprises wastewater flocculation clarification pretreatment equipment 4, wastewater low-temperature double-effect thermal method concentration treatment equipment 5 and wastewater boiler flue gas bypass evaporation treatment equipment 6, the wastewater flocculation clarification pretreatment equipment 4 adopts an integrated high-efficiency clarifier to realize wastewater standard treatment including first pollutants, the wastewater low-temperature double-effect thermal method concentration treatment equipment 5 adopts a thermal method concentration reduction device to realize concentration and separation of the wastewater, and the wastewater boiler flue gas bypass evaporation treatment equipment 6 adopts a bypass flue evaporation device to realize drying and solidification of the separated concentrated water.
The pre-carbonization integrated sludge treatment equipment 1, the power station boiler combustion evaporation equipment 2, the desulfurization absorption tower condensation and collection equipment 3, the wastewater flocculation clarification pretreatment equipment 4, the wastewater low-temperature double-effect thermal method concentration treatment equipment 5 and the wastewater boiler flue gas bypass evaporation treatment equipment 6 are sequentially connected.
When the system works, municipal sludge firstly enters a preposed carbonization integrated sludge treatment device 1, sludge wastewater is separated from sludge through the preposed carbonization integrated treatment device and enters a power station boiler combustion evaporation device 2 in a gas state, the sludge wastewater gradually runs to a desulfurization absorption tower condensation and collection device 3 along with a boiler flue gas system in a flue gas component form, condensation is separated out and reaches a wastewater flocculation clarification pretreatment device 4, standard treatment is realized after clarification treatment, the wastewater enters a wastewater low-temperature double-effect thermal method concentration treatment device 5 to realize concentration and reduction of the wastewater, and finally the wastewater enters a boiler flue gas bypass evaporation treatment device to realize analysis of salt and moisture, all pollutants enter an ash storehouse in a fly ash form, evaporation and recycling are realized, and zero discharge of the wastewater is realized.
Furthermore, the integrated efficient clarifier is divided into a primary reaction area, a secondary reaction area and a clarification area, desulfurization wastewater firstly enters the primary reaction area for reaction, lime medicament is added into the primary reaction area, the desulfurization wastewater enters the secondary reaction area for continuous reaction after the reaction is finished, flocculant medicament is added into the secondary reaction area, effluent of the secondary reactor enters the clarification area for solid-liquid separation, each area is provided with a stirrer, different areas are blocked by a baffle, and water enters adjacent areas through overflow; the three areas are arranged in a concentrated mode, occupied land is saved, the three areas are communicated in an overflow mode, and the situation that a connecting pipeline of conventional equipment is blocked is avoided.
The utility boiler combustion and evaporation equipment 2 comprises a boiler furnace 7 and an SCR denitration device 8, the desulfurization absorption tower condensation collecting equipment 3 comprises a dust removal device 10 and a desulfurization device 11, and an air preheater 9 is connected between the utility boiler combustion and evaporation equipment 2 and the desulfurization absorption tower condensation collecting equipment 3.
Example 2:
referring to fig. 3, on the basis of embodiment 1, the low-temperature double-effect thermal concentration treatment apparatus 5 for wastewater comprises a first-effect heater 12, a first-effect cooler 13, a second-effect heater 14 and a second-effect cooler 15 which are connected in sequence.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A thermal power plant boiler mixes and burns behind mud waste water treatment recycling system, characterized by, including coal-fired coupling mud mixes and burns processing portion, waste water extraction part and waste water treatment recycling portion, the coal-fired coupling mud mixes and burns processing portion and has leading carbonization integration sludge treatment equipment (1), the waste water extraction part includes power plant boiler combustion evaporation equipment (2) and desulfurization absorption tower condensation collecting equipment (3), adopt and deviate from and absorb the moisture that increases in the mud mixing and burning in the tower outlet saturated flue gas extraction; the wastewater treatment and recycling part comprises wastewater flocculation clarification pretreatment equipment (4), wastewater low-temperature double-effect thermal method concentration treatment equipment (5) and wastewater boiler flue gas bypass evaporation treatment equipment (6).
2. The thermal power plant boiler after sludge blending combustion wastewater treatment and recycling system according to claim 1, characterized in that the preposed carbonization integrated sludge treatment equipment (1), the power plant boiler combustion evaporation equipment (2), the desulfurization absorption tower condensation collection equipment (3), the wastewater flocculation clarification pretreatment equipment (4), the wastewater low-temperature double-effect thermal method concentration treatment equipment (5) and the wastewater boiler flue gas bypass evaporation treatment equipment (6) are sequentially connected.
3. The system for treating and recycling the waste water generated after the sludge is mixed in the boiler of the thermal power plant according to the claim 1 or 2, characterized in that the flocculation clarification pretreatment equipment (4) of the waste water adopts an integrated high-efficiency clarifier to realize the standard treatment of the waste water including the first class of pollutants, the low-temperature double-effect thermal method concentration treatment equipment (5) of the waste water adopts a thermal method concentration and reduction device to realize the concentration and separation of the waste water, and the bypass evaporation treatment equipment (6) of the flue gas of the boiler of the waste water adopts a bypass flue evaporation device to realize the drying and solidification of the separated concentrated water.
4. The thermal power plant boiler sludge-blending post-treatment and recycling system as claimed in claim 3, wherein the integrated high-efficiency clarifier is divided into a primary reaction zone, a secondary reaction zone and a clarification zone, desulfurization wastewater firstly enters the primary reaction zone for reaction, lime agent is added into the primary reaction zone, after the reaction is finished, the desulfurization wastewater enters the secondary reaction zone for continuous reaction, flocculant agent is added into the secondary reaction zone, effluent of the secondary reactor enters the clarification zone for solid-liquid separation, each zone is provided with a stirrer, different zones are blocked by baffles, and adjacent zones enter water by overflow.
5. The thermal power plant boiler sludge blending post-treatment and recycling system as claimed in claim 2, wherein the power plant boiler combustion and evaporation equipment (2) comprises a boiler furnace (7) and an SCR denitration device (8), and the desulfurization absorption tower condensation and collection equipment (3) comprises a dust removal device (10) and a desulfurization device (11).
6. The thermal power plant boiler sludge-blending post-treatment and recycling system as claimed in claim 5, wherein an air preheater (9) is connected between the power plant boiler combustion evaporation equipment (2) and the desulfurization absorption tower condensation collection equipment (3).
7. The system for treating and recycling the waste water generated after the sludge is mixed in the boiler of the thermal power plant according to the claim 1 or 2, wherein the waste water low-temperature double-effect thermal method concentration treatment equipment (5) comprises a first-effect heater (12), a first-effect cooler (13), a second-effect heater (14) and a second-effect cooler (15) which are sequentially connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010972168.4A CN111911940A (en) | 2020-09-16 | 2020-09-16 | Waste water treatment recycling system after sludge is mixed and burned in boiler of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010972168.4A CN111911940A (en) | 2020-09-16 | 2020-09-16 | Waste water treatment recycling system after sludge is mixed and burned in boiler of thermal power plant |
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| CN202010972168.4A Pending CN111911940A (en) | 2020-09-16 | 2020-09-16 | Waste water treatment recycling system after sludge is mixed and burned in boiler of thermal power plant |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060021028A (en) * | 2004-09-02 | 2006-03-07 | 재단법인 포항산업과학연구원 | Method for treating wastewater in manufacturing coke |
| CN104926008A (en) * | 2014-03-18 | 2015-09-23 | 王辛平 | Wet desulfurization wastewater zero emission process and device thereof |
| CN105347413A (en) * | 2015-11-26 | 2016-02-24 | 清华大学 | Plate-type hydrophobic polymer double-effect MVR (Mechanical Vapor Recompression) system and wastewater concentration method |
| ES2565014A1 (en) * | 2015-12-16 | 2016-03-30 | Sociedad Anónima Depuración Y Tratamientos | Brackish water desalination system with zero discharge (Machine-translation by Google Translate, not legally binding) |
| CN108397249A (en) * | 2018-03-30 | 2018-08-14 | 四川雷鸣环保装备有限公司 | Coal-fired coupled biological matter, rubbish, sludge gasification burning cogeneration system and technique |
| CN111439882A (en) * | 2020-04-28 | 2020-07-24 | 大唐环境产业集团股份有限公司 | Desulfurization wastewater zero discharge system utilizing flue gas waste heat of power plant |
-
2020
- 2020-09-16 CN CN202010972168.4A patent/CN111911940A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20060021028A (en) * | 2004-09-02 | 2006-03-07 | 재단법인 포항산업과학연구원 | Method for treating wastewater in manufacturing coke |
| CN104926008A (en) * | 2014-03-18 | 2015-09-23 | 王辛平 | Wet desulfurization wastewater zero emission process and device thereof |
| CN105347413A (en) * | 2015-11-26 | 2016-02-24 | 清华大学 | Plate-type hydrophobic polymer double-effect MVR (Mechanical Vapor Recompression) system and wastewater concentration method |
| ES2565014A1 (en) * | 2015-12-16 | 2016-03-30 | Sociedad Anónima Depuración Y Tratamientos | Brackish water desalination system with zero discharge (Machine-translation by Google Translate, not legally binding) |
| CN108397249A (en) * | 2018-03-30 | 2018-08-14 | 四川雷鸣环保装备有限公司 | Coal-fired coupled biological matter, rubbish, sludge gasification burning cogeneration system and technique |
| CN111439882A (en) * | 2020-04-28 | 2020-07-24 | 大唐环境产业集团股份有限公司 | Desulfurization wastewater zero discharge system utilizing flue gas waste heat of power plant |
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Effective date of registration: 20201201 Address after: No. 246, Xiqing Road, Xiqing District, Tianjin Applicant after: HUANONG YANGLIUQING THERMOELEC Address before: No. 246, Xiqing Road, Xiqing District, Tianjin Applicant before: Chen Honglin |