CN111320319A - High salt waste water cryoconcentration processing apparatus - Google Patents
High salt waste water cryoconcentration processing apparatus Download PDFInfo
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- CN111320319A CN111320319A CN202010236823.XA CN202010236823A CN111320319A CN 111320319 A CN111320319 A CN 111320319A CN 202010236823 A CN202010236823 A CN 202010236823A CN 111320319 A CN111320319 A CN 111320319A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 106
- 150000003839 salts Chemical class 0.000 title description 4
- 238000012545 processing Methods 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 143
- 238000011282 treatment Methods 0.000 claims abstract description 31
- 230000001105 regulatory effect Effects 0.000 claims abstract description 25
- 238000005352 clarification Methods 0.000 claims abstract description 23
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- 239000007787 solid Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 26
- 239000003546 flue gas Substances 0.000 abstract description 26
- 238000006477 desulfuration reaction Methods 0.000 abstract description 16
- 230000023556 desulfurization Effects 0.000 abstract description 16
- 230000003009 desulfurizing effect Effects 0.000 abstract description 7
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
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- 238000009834 vaporization Methods 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 description 14
- 230000008020 evaporation Effects 0.000 description 13
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- 239000000243 solution Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
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- 239000007924 injection Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005273 aeration Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 238000000151 deposition Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000008394 flocculating agent Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000011221 initial treatment Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
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- 230000003203 everyday effect Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
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- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/507—Sulfur oxides by treating the gases with other liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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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
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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
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
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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
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
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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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Abstract
The invention relates to the technical field of desulfurization wastewater treatment, in particular to a high-salinity wastewater low-temperature concentration treatment device, which comprises a regulating tank 1, a clarification tank 2, a buffer tank 3 and a flue 4; the adjusting tank 1, the clarification tank 2, the buffer tank 3 and the flue 4 are communicated in sequence; the flue 4 comprises a flue body, a plurality of water distributors 5 and a plurality of flow guide components; the buffer tank 3 is communicated with the water distributor 5; a plurality of water inlets 7 are formed in the top wall of the flue body; all the water distributors 5 can be movably arranged on the outer side of the flue body, all the drainage parts are arranged in the flue body, and the drainage parts penetrate through the water inlet 7 and are connected with the water distributors 5 through a water inlet pipe 8. The device has effectively solved because of the flue gas velocity of flow is very fast, and waste water droplet is not evaporated completely and is brought into desulfurizing tower 15 by the flue gas promptly, causes the vaporization system inefficiency, and then leads to the problem of the inside corruption scale deposit of flue 4.
Description
Technical Field
The invention relates to the technical field of desulfurization wastewater treatment, in particular to a high-salinity wastewater low-temperature concentration treatment device.
Background
With the rapid development of economy in China, a large amount of wastewater is generated every day, and the treatment of high-salinity wastewater is more and more emphasized.
The desulfurization wastewater discharged by the wet desulfurization system of the coal-fired power plant has complex components and various pollutant types, and is one of the most difficult wastewater to treat in the coal-fired power plant. At present, the chemical precipitation method is mainly adopted to treat the desulfurization wastewater in China, the wastewater is directly discharged after heavy metal impurities are removed through neutralization, sedimentation and flocculation treatment, but the salt content of the effluent water is still as high as 2-4 percent due to the existence of a large amount of sulfate and chloride in the wastewater. The direct discharge can cause the ecological damage of surface water and soil, resulting in secondary pollution.
In recent years, a new process for evaporating and drying desulfurization wastewater by using flue gas waste heat is researched and developed, the desulfurization wastewater is sprayed into a flue, the wastewater is completely evaporated by using hot flue gas, and pollutants in the wastewater are converted into solid substances such as crystals or salts, so that the pollutants are removed and zero emission of the wastewater is realized. The process has low investment and operation cost and simple process flow, but has some disadvantages. For example, in the conventional low-temperature flue evaporation, because the flow rate of flue gas is high, a large amount of waste water droplets are not completely evaporated and are brought into a desulfurizing tower by the flue gas, so that the efficiency of an evaporation system is low, and the waste water droplets which are not completely evaporated are easy to corrode and deposit dust on a downstream flue.
Therefore, the method aims at improving the efficiency of an evaporation system and reducing the corrosion and scaling of a flue by using a low-temperature evaporation concentration treatment process of high-salinity wastewater, and is a main problem which is urgently needed to be solved by the low-temperature flue concentration technology at present.
Disclosure of Invention
The invention aims to provide a high-salinity wastewater low-temperature concentration treatment device which can improve the efficiency of wastewater evaporation along with flue gas.
The invention provides a high-salinity wastewater low-temperature concentration treatment device, which comprises a regulating reservoir, a clarification tank, a buffer tank and a flue, wherein the regulating reservoir is arranged in the clarification tank;
the adjusting tank, the clarification tank, the buffer tank and the flue are communicated in sequence;
the flue comprises a flue body, a plurality of water distributors and a plurality of drainage components;
the buffer tank is communicated with the water distributor;
a plurality of water inlets are formed in the top wall of the flue body;
all the water distributors are movably arranged on the outer side of the flue body, all the drainage parts are arranged in the flue body, and the drainage parts penetrate through the water inlet and are connected with the water distributors through a water inlet pipe.
The regulating reservoir, the clarification tank, the buffer tank and the flue in the high-salinity wastewater low-temperature concentration treatment device are sequentially communicated, namely, the desulfurization wastewater is sequentially pretreated by the regulating reservoir, the clarification tank and the buffer tank and then enters the flue for evaporation concentration. The pretreatment can preliminarily reduce the concentration of heavy metal and solid suspended matters in the wastewater, thereby reducing the corrosion and scaling of the wastewater to a flue in the evaporation process. The flue comprises a flue body, a plurality of water distributors and a plurality of drainage components, wherein the water distributors are movably arranged on the outer side of the flue body, the drainage components are arranged inside the flue body, the buffer tank is communicated with the water distributors, a plurality of water inlets are formed in the top wall of the flue body, and the drainage components penetrate through the water inlets and are connected with the water distributors through a water inlet pipe. The water outlet of the buffer pool enters the water distributor, the water outlet of the water distributor is communicated with the flue body through a water inlet pipe, and the drainage component is connected with the water inlet pipe, so that the water distributor shunts the wastewater, and the shunted wastewater enters the flue and then flows to the bottom of the flue from top to bottom along the drainage component. The diversion effect of the water distributor and the drainage effect of the drainage component prolong the action time of the wastewater and the flue gas, increase the action areas of the wastewater and the flue gas, and further improve the wastewater concentration efficiency.
Further, the water distributor comprises a main pipe and a plurality of branch pipes;
all the branch pipes are distributed on the main pipe, one end of each branch pipe is communicated with the main pipe, and the other end of each branch pipe is correspondingly connected with the drainage component one by one through the water inlet pipe;
the buffer pool is communicated with the main pipe.
The water distributor comprises a main pipe and a plurality of branch pipes, wherein all the branch pipes are distributed on the main pipe, one end of each branch pipe is communicated with the main pipe, and the other end of each branch pipe is connected with the drainage component in a one-to-one correspondence mode through a water inlet pipe. Therefore, after entering from the main pipe of the water distributor, the wastewater in the buffer tank flows out from the branch pipes of the water distributor respectively and enters the flue through the water inlet pipe, and then flows to the bottom of the flue from top to bottom along the water inlet pipe provided with the drainage component. Therefore, the arrangement mode of the main pipe and the branch pipes of the water distributor can ensure that the waste water is uniformly distributed in the flue, and the problem of low waste water evaporation and concentration efficiency caused by direct spraying of the waste water is effectively avoided.
Further, the distance between every two adjacent water distributors and between the main pipes is not less than 30 cm; and the distance between the branch pipes on the same water distributor is not less than 8 cm.
In order to improve the water distribution effect of the water distributor, the distance between main pipes of the water distributor is not less than 30cm, the distance between branch pipes of the water distributor is not less than 8cm, and the branch pipes of the water distributor are uniformly distributed.
Further, the drainage component comprises a drainage line and a fixing net;
the fixed net is arranged on the bottom wall of the flue body; one end of the drainage pipeline is abutted to the fixing net, and the other end of the drainage pipeline penetrates through the top wall of the flue and is detachably connected with the water inlet pipe.
The drainage part includes drainage pipeline and fixed network, and the fixed network setting is on the inside diapire of flue, and drainage pipeline's one end offsets with the fixed network, and the other end passes the flue roof and can dismantle with the inlet tube and be connected. The setting of fixed network has played certain fixed action to drainage pipeline, prevents that drainage pipeline from inclining at will at the drainage in-process, and drainage pipeline can dismantle with the inlet tube and be connected, appears the scale deposit back on the drainage pipeline, is convenient for in time dismantle drainage pipeline and washes.
Furthermore, the drainage pipelines are parallel to each other and form an included angle of 30-90 degrees with the axial direction of the flue body.
The drainage pipelines are parallel to each other and form an included angle of 30-90 degrees with the axial direction of the flue body, namely the drainage pipelines and the flow velocity direction of flue gas are 30-90 degrees, so that the flowing direction of water flow and the flowing direction of flue gas are ensured to be the same, and the action time of waste water and flue gas is further prolonged.
Further, the drainage pipeline is of a tubular or solid structure, and a thread structure is arranged on the outer surface of the drainage pipeline.
Because of the effect that the drainage pipeline only plays reposition of redundant personnel drainage to waste water, consequently, the drainage pipeline can set up to tubulose or solid construction to, in order to improve the drainage pipeline to the adhesive force of waste water, can set up helicitic texture at the surface of drainage pipeline.
Furthermore, one end of the water inlet pipe, which is positioned inside the flue, is provided with a rubber water nozzle.
The one end that the inlet tube is located the flue inside is provided with the rubber water injection well choke, and the rubber water injection well choke all has certain elasticity, and the accessible is intake pressure and is adjusted and control its aperture, like this, when the scale deposit appears in rubber water injection well choke department, can increase intake pressure, and then erodees the scale deposit on the water injection well choke and get off.
Furthermore, a flow regulating valve is arranged on the water inlet pipe.
Be provided with flow control valve on the inlet tube, when needs are changed a certain drainage tube or rubber water injection well choke, can directly close flow control valve on the corresponding inlet channel, do not influence the work of other drainage parts.
Further, a water collecting tank is arranged at the bottom of the flue body;
the water collecting tank is of a conical structure, and the conical angle is greater than 45 degrees;
the water collecting tank is communicated with the regulating tank, and a regulating valve is arranged on a communicated passage.
The bottom of flue body is provided with the water catch bowl, and the water catch bowl is used for collecting by the concentrated waste water of flue gas, and the water catch bowl communicates with the equalizing basin, and like this, the waste water of collecting in the water catch bowl can be carried to the equalizing basin, and then repeats above-mentioned preliminary treatment and concentrated process. And when the concentrated wastewater in the water collecting tank reaches a certain concentration multiple, the concentrated wastewater is directly discharged to the next-stage treatment process.
Compared with the prior art, the high-salinity wastewater low-temperature concentration treatment device has the following advantages:
in the high-salinity wastewater low-temperature concentration treatment device, desulfurization wastewater sequentially passes through the regulating tank, the clarifying tank and the buffer tank to pretreat the desulfurization wastewater, the pretreated wastewater enters the flue body through the water distributor and flows from top to bottom along the drainage component, and the wastewater is heated by hot flue gas and is evaporated and concentrated on the surface of the drainage component. The arrangement of the regulating tank, the clarification tank and the buffer tank can carry out primary treatment on the desulfurization wastewater to remove part of heavy metals and suspended matters in the wastewater, thereby reducing the hardness of the wastewater and reducing the corrosion and dust deposition of the fog drops of the wastewater on a flue; the arrangement of the water distributor and the drainage component increases the action time of the waste water and the flue gas, and improves the evaporation efficiency of the waste water. Therefore, the device effectively solves the problems that because the flow velocity of the flue gas is high, the waste water fog drops are not evaporated completely, namely, the waste water fog drops are brought into the desulfurizing tower by the flue gas, so that the efficiency of an evaporation system is low, and the inside of a flue is corroded and scaled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a high-salinity wastewater cryoconcentration treatment apparatus according to the present invention;
FIG. 2 is a partially enlarged view of the high-salinity wastewater low-temperature concentration treatment device of the invention.
Description of reference numerals:
1: a regulating tank; 2: a clarification tank; 3: a buffer pool; 4: a flue; 5: a water distributor; 6: a drainage line; 7: a water inlet; 8: a water inlet pipe; 9: a main pipe; 10: a branch pipe; 11: fixing the net; 12: a rubber water nozzle; 13: a flow regulating valve; 14: a water collection tank; 15: a desulfurizing tower; 16: an aeration member; 17: a pH on-line monitoring and adjusting component; 18: an administration member.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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 is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and 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 considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; 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.
As shown in fig. 1-2, the device for low-temperature concentration treatment of high-salinity wastewater comprises a regulating reservoir 1, a clarification tank 2, a buffer tank 3 and a flue 4; the adjusting tank 1, the clarification tank 2, the buffer tank 3 and the flue 4 are communicated in sequence; the flue 4 comprises a flue 4 body, a plurality of water distributors 5 and a plurality of flow guide components; the buffer tank 3 is communicated with the water distributor 5; a plurality of water inlets 7 are formed in the top wall of the flue 4 body; all the water distributors 5 can be movably arranged outside the flue 4 body, all the drainage parts are arranged inside the flue 4 body, and the drainage parts penetrate through the water inlet 7 and are connected with the water distributors 5 through a water inlet pipe 8.
The low-temperature concentration treatment device for the high-salinity wastewater comprises an adjusting tank 1, a clarification tank 2, a buffer tank 3 and a flue 4, wherein an aeration component 16 and a pH on-line monitoring and adjusting component 17 are arranged on the adjusting tank 1 and used for adjusting the quality of the desulfurization wastewater, providing an aeration place for the wastewater and treating SO in the wastewater3 2-Oxidation to SO4 2-(ii) a The effluent of the adjusting tank 1 flows to a clarification tank 2, a dosing component 18 is arranged on the clarification tank 2, and whether a flocculating agent and a coagulant aid are added or not can be selected according to factors such as water quality condition, precipitated sludge performance, subsequent clarification time and the like, wherein the flocculating agent is preferably polyaluminium chloride or other acidic flocculating agents, and in the invention, the concentration of suspended solid in the effluent of the clarification tank 2 is less than 1000 mg/L; the effluent of the clarification tank 2 flows to a buffer tank 3, and the buffer tank 3 can adjust the amount of wastewater entering a flue 4; the waste water in the buffer tank 3 is pumped into the flue 4 by a water pump and passes through hot flue gasAnd (4) carrying out evaporation concentration. And the flue 4 comprises a flue body, a plurality of water distributors 5 and a plurality of drainage components, wherein the water distributors 5 are movably arranged outside the flue body, the drainage components are arranged inside the flue body, and the drainage components penetrate through a water inlet 7 on the top wall of the flue body and are connected with the water distributors 5 through a water inlet pipe 8. Thus, the water discharged from the buffer pool 3 enters the flue 4 through the water distributor 5 and then flows to the bottom of the flue 4 from top to bottom along the drainage component. Therefore, the adjusting tank 1, the clarifying tank 2 and the buffer tank 3 can be used for carrying out primary treatment on the desulfurization wastewater to remove part of heavy metals and suspended matters in the wastewater, so that the hardness of the wastewater is reduced, the corrosion and dust deposition of fog drops of the wastewater on the flue 4 are reduced, the water distributor 5 and the drainage component are arranged, the action time of the wastewater and flue gas is prolonged, and the evaporation efficiency of the wastewater is improved.
On the basis of the technical scheme, the water distributor 5 further comprises a main pipe 9 and a plurality of branch pipes 10; all the branch pipes 10 are distributed on the main pipe 9, one end of each branch pipe is communicated with the main pipe 9, and the other end of each branch pipe is correspondingly connected with the drainage component through the water inlet pipe 8; the buffer tank 3 is communicated with the main pipe 9.
The water distributor 5 comprises a main pipe 9 and a plurality of branch pipes 10, wherein all the branch pipes 10 are distributed on the main pipe 9, one end of each branch pipe is communicated with the main pipe 9, and the other end of each branch pipe is connected with the drainage component in a one-to-one correspondence mode through a water inlet pipe 8. The water discharged from the buffer pool 3 enters the main pipe 9 of the water distributor 5 and then is distributed to each branch pipe 10, the water discharged from the branch pipes 10 enters the flue 4 through the water inlet pipe 8, and the water inlet pipe 8 is provided with the drainage component, so that the wastewater entering the flue 4 flows to the bottom of the flue 4 from top to bottom along the drainage component, the evaporation time of the wastewater in the flue 4 is ensured, and the wastewater drops entering the desulfurizing tower 15 are reduced.
In order to improve the water distribution effect of the water distributors 5, the distance between the main pipes between every two adjacent water distributors is not less than 30 cm; on the same water distributor, the distance between the branch pipes 10 is not less than 8 cm.
On the basis of the technical scheme, preferably, the drainage component comprises a drainage pipeline 6 and a fixing net 11; the fixed net 11 is arranged on the bottom wall of the flue body; one end of the drainage pipeline 6 is abutted to the fixing net 11, and the other end of the drainage pipeline penetrates through the top wall of the flue 4 and is detachably connected with the water inlet pipe 8.
The drainage part includes drainage pipeline 6 and fixed network 11, and fixed network 11 sets up on the diapire of flue body, and drainage pipeline 6's one end offsets with fixed network 11, and the other end passes 4 roofs of flue and can dismantle with inlet tube 8 and be connected. The water inlet pipe 8 is connected with a water inlet 7 arranged on the top wall of the flue 4 through a loose joint, and the upper end of the drainage pipeline 6 is connected with the water inlet pipe 8 through threads or flanges to be disassembled and assembled, so that the disassembly, assembly and maintenance are convenient. The fixed net 11 is arranged on the bottom wall of the flue body and has a fixing effect on the lower end of the drainage pipeline 6.
On the basis of the preferable technical scheme, furthermore, the drainage pipelines 6 are parallel to each other and form an included angle of 30-90 degrees with the axial direction of the flue body.
The drainage pipelines 6 are parallel to each other and form an included angle of 30-90 degrees with the wind direction at the flow speed of the flue gas, and the drainage pipelines 6 are in the same direction with the flue gas, so that the action time of the flue gas and the waste water can be prolonged, and the concentration efficiency of the waste water is increased.
On the basis of the above preferred technical solution, more preferably, the drainage line 6 is of a tubular or solid structure, and the outer surface of the drainage line 6 is provided with a thread structure.
The drainage pipeline 6 only plays a role in drainage of wastewater, so the drainage pipeline 6 can be set to be of a tubular or solid structure made of flexible materials or rigid materials, and when the outer surface of the drainage pipeline 6 is made of hydrophilic materials, the adhesion force of the drainage pipeline 6 to the wastewater can be further increased, water drops are prevented from being taken away by smoke, and therefore the drainage pipeline 6 plays a role in improving drainage and heat exchange.
In order to avoid scaling at the water inlet 7, one end of the water inlet pipe 8, which is positioned inside the flue 4, is provided with a rubber water nozzle 12.
The rubber water nozzle 12 is made of materials with strong sulfuric acid corrosion resistance and high temperature resistance, such as butyl rubber, fluororubber and the like, has certain elasticity, and can be adjusted and controlled in opening degree through water inlet pressure.
In order to separately control the water inlet and the pipeline maintenance, a flow regulating valve 13 is arranged on the water inlet pipe 8.
A total flow regulating valve 13 is arranged between the water distributor 5 and the buffer tank 3, and each water inlet pipe 8 is separately provided with the flow regulating valve 13, so that the opening and closing of each water inlet pipe 8 can be controlled separately.
On the basis of the above preferred technical solution, more preferably, the bottom of the flue body is provided with a water collecting tank 14; the water collecting tank 14 is in a conical structure, and the conical angle is more than 45 degreeso(ii) a The water collecting tank 14 is communicated with the regulating tank 1, and a regulating valve is arranged on a communicated passage.
The bottom of the flue body is provided with a water collecting tank 14, the water collecting tank 14 is used for collecting the waste water concentrated by the flue gas in the flue 4, and the water collecting tank 14 is communicated with the regulating reservoir 1, namely the concentrated waste water collected in the water collecting tank 14 can flow back into the regulating reservoir 1, and then the pretreatment and flue gas concentration processes are repeated. The sulfate radical in the concentrated wastewater can be fully utilized to carry out pre-precipitation on the calcium ions in the wastewater, and the wastewater utilization rate is improved.
The high-salinity wastewater low-temperature concentration treatment device in the preferable technical scheme is used for treating the desulfurization wastewater of a certain power plant.
The actual desulfurization wastewater of a certain power plant is taken as a treatment object, the experimental verification that the field treatment capacity is 1 ton/hour is carried out, the wastewater is taken from the effluent of the triple box treatment system, and the concentration of main pollutants in the wastewater is shown in table 1.
TABLE 1 concentration of major contaminants in wastewater
Firstly, desulfurization waste water enters a regulating tank 1, the waste water is aerated through an aeration part 16 at the bottom of the regulating tank 1, and SO in the waste water is treated3 2-Oxidation to SO4 2-The retention time in the regulating tank 1 is 1 hour; the effluent of the adjusting tank 1 enters a clarification tank 2, and the retention time of the wastewater in the clarification tank 2 is 3 hoursThe SS of the effluent of the clarification tank 2 is 80mg/L, and the sludge in the clarification tank 2 is discharged into a sludge dewatering system through a sludge discharge system for further treatment; 2 overflow effluent of depositing reservoir gets into buffer pool 3, waste water in the buffer pool 3 is squeezed into water-locator 5 and then gets into flue 4 by the pump again, through water-locator 5 with waste water evenly distributed, the waste water that gets into flue 4 flows along 6 outside top-down of drainage pipeline, drainage pipeline 6 is 45 with flue gas upwind direction contained angle, drainage pipeline 6 adopts the polytetrafluoroethylene material, waste water passes through hot flue gas heating, evaporative concentration is carried out on drainage pipeline 6 surface, vapor gets into desulfurizing tower 15 along with the flue gas, waste water after the concentration passes through water catch bowl 14 of flue 4 below and collects, and get back to repeat above-mentioned concentrated process in the equalizing basin 1. When the TDS in the concentrated wastewater reaches 15 ten thousand mg/l, the concentrated water is directly discharged for subsequent solidification treatment.
The results show that after the wastewater is circularly evaporated for 3 times, the TDS in the concentrated wastewater in the water collecting tank 14 reaches 15 ten thousand mg/L. Under the same operation condition, when the drainage pipeline 6 is not arranged, the TDS in the concentrated water can reach 15 ten thousand mg/L after the wastewater is circularly evaporated for 9 times. Therefore, through the arrangement and the reasonable use of the wastewater drainage pipeline 6, wastewater liquid drops can be effectively prevented from entering the desulfurizing tower 15, the concentration efficiency of the system is greatly improved, the operation energy consumption is saved, and good economic and environmental benefits are achieved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A low-temperature concentration treatment device for high-salinity wastewater is characterized by comprising a regulating reservoir (1), a clarification tank (2), a buffer tank (3) and a flue (4);
the adjusting tank (1), the clarification tank (2), the buffer tank (3) and the flue (4) are communicated in sequence;
the flue (4) comprises a flue body, a plurality of water distributors (5) and a plurality of drainage components;
the buffer tank (3) is communicated with the water distributor (5);
a plurality of water inlets (7) are formed in the top wall of the flue body;
all the water distributors (5) can be movably arranged on the outer side of the flue body, all the drainage parts are arranged in the flue body, and the drainage parts penetrate through the water inlet (7) and are connected with the water distributors (5) through a water inlet pipe (8).
2. Treatment plant according to claim 1, characterized in that the water distributor (5) comprises a main pipe (9) and a plurality of branch pipes (10);
all the branch pipes (10) are distributed on the main pipe (9), one end of each branch pipe is communicated with the main pipe (9), and the other end of each branch pipe is correspondingly connected with the drainage component one by one through the water inlet pipe (8);
the buffer pool (3) is communicated with the main pipe (9).
3. The treatment device according to claim 2, wherein the distance between the main pipes (9) between every two adjacent water distributors (5) is not less than 30 cm; on the same water distributor (5), the distance between the branch pipes (10) is not less than 8 cm.
4. The treatment device according to claim 1, wherein the drainage means comprises a drainage line (6) and a fixing net (11);
the fixed net (11) is arranged on the bottom wall of the flue body; one end of the drainage pipeline (6) is abutted to the fixing net (11), and the other end of the drainage pipeline penetrates through the top wall of the flue (4) and is detachably connected with the water inlet pipe (8).
5. Treatment device according to claim 4, characterized in that the drainage lines (6) are parallel to each other and form an angle of 30-90 ° with the axial direction of the flue body.
6. Treatment device according to claim 5, characterized in that the drainage line (6) is of tubular or solid construction and that the outer surface of the drainage line (6) is provided with a thread construction.
7. Treatment device according to claim 1, characterized in that the end of the inlet pipe (8) inside the flue (4) is provided with a rubber water nozzle (12).
8. Treatment device according to claim 7, characterized in that the inlet conduit (8) is provided with a flow regulating valve (13).
9. Treatment device according to claim 6, characterized in that the bottom of the flue body is provided with a water collection sump (14);
the water collecting tank (14) is of a conical structure, and the conical angle is larger than 45 degrees;
the water collecting tank (14) is communicated with the adjusting tank (1), and an adjusting valve is arranged on a communicated passage.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080245A (en) * | 2015-08-21 | 2015-11-25 | 北京建筑大学 | System and method for integrally recycling condensation heat energy of flue gas with dust and purifying flue gas |
| CN209974506U (en) * | 2018-12-27 | 2020-01-21 | 北京铝能清新环境技术有限公司 | Wet flue gas desulfurization waste water concentration decrement system |
| CN211999301U (en) * | 2020-03-30 | 2020-11-24 | 大唐环境产业集团股份有限公司 | High salt waste water cryoconcentration processing apparatus |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105080245A (en) * | 2015-08-21 | 2015-11-25 | 北京建筑大学 | System and method for integrally recycling condensation heat energy of flue gas with dust and purifying flue gas |
| CN209974506U (en) * | 2018-12-27 | 2020-01-21 | 北京铝能清新环境技术有限公司 | Wet flue gas desulfurization waste water concentration decrement system |
| CN211999301U (en) * | 2020-03-30 | 2020-11-24 | 大唐环境产业集团股份有限公司 | High salt waste water cryoconcentration processing apparatus |
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