CN212076473U - Mine and power plant wastewater cooperative treatment system - Google Patents
Mine and power plant wastewater cooperative treatment system Download PDFInfo
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- CN212076473U CN212076473U CN202020460886.9U CN202020460886U CN212076473U CN 212076473 U CN212076473 U CN 212076473U CN 202020460886 U CN202020460886 U CN 202020460886U CN 212076473 U CN212076473 U CN 212076473U
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Abstract
The utility model provides a mine and power plant waste water is processing system in coordination, its includes mine water processing system and power plant waste water processing system, power plant waste water processing system includes crystal seed method evaporation crystallization device, crystal seed method evaporation crystallization device is provided with a medicament blending device through the tube coupling, the medicament blending device is provided with and is used for putting in the pipeline of the produced mine water mother liquor of mine water processing system. The utility model provides a mine and power plant waste water cooperative treatment system can save the device that is arranged in handling mine water mother liquor of successor in the current mine water treatment system on the one hand, and on the other hand can reduce to adopt the seed crystal method required seed crystal medicament cost of input among the power plant waste water treatment system to but greatly reduced water treatment's comprehensive cost, in addition, can also shift the chloride salt of mine aquatic in the power plant waste water treatment system with the principal component chloride of desulfurization waste water deals with in coordination, finally form the effective recycle of industrial salt product.
Description
Technical Field
The utility model relates to an environmental protection technology field especially relates to a system for carry out coprocessing to mine waste water and power plant's waste water.
Background
For a certain scale of mining enterprises, such as coal mine enterprises, in order to ensure the safety of energy supply, an independent thermal power plant is usually configured to supply energy. With the promotion of the national requirement standard for environmental protection, the mine high-salinity wastewater and the desulfurization wastewater generated in the flue gas treatment process of the thermal power plant both need to be treated before being discharged.
At present, mine water is customarily divided into five types, namely clean mine water, mine water containing suspended matters, mine water with high mineralization, acid mine water and mine water containing toxic and harmful elements or radioactive elements according to the influence on the environment and the feasibility of being used as a domestic drinking water source in China. The high-salinity mine water mainly refers to mine water with the total content of inorganic salts with the salinity of more than 1000 mg/L. Mainly contains S04 2-、Cl-、Ca2+、K+、Na+And (3) plasma. The existing treatment methods for the mine water with high mineralization degree comprise a chemical method, a membrane separation method, concentration and evaporation and the like. For a mine water treatment system, particularly a system for treating high-salinity mine water, no matter which treatment method is adopted, mine water mother liquor needing final treatment can be generated, and in the prior art, the treatment method of the mine water mother liquor obtains mixed salt solid through evaporative crystallization or steam drying, and the mixed salt solid is finally used as solid waste or hazardous waste for landfill disposal.
The water quality of the desulfurization wastewater generated by the power plant is characterized by high calcium and magnesium concentration, high chloride ion concentration, high sulfate radical ion concentration, high sulfite radical ion concentration and certain amount of heavy metal, SS and other pollution components. In the prior art, the 'zero emission' treatment technology for the desulfurization wastewater with higher magnesium ion content has the following process routes:
1) adding a large amount of lime, soda ash and other medicaments into the desulfurization wastewater after removing heavy metals and SS to soften the desulfurization wastewater, finally obtaining softened mixed solution containing sodium sulfate and sodium chloride, and then recovering industrial salt products or finally obtaining mixed salt through a membrane method and evaporative crystallization;
2) the desulfurization wastewater is concentrated and reduced after being simply pretreated by adding agents such as alkali liquor and the like, and then the concentrated solution is dried by a flue gas bypass evaporation drying system to obtain mixed solid which is used as the raw material of the cement together with the fly ash.
3) The seed crystal method comprises the following steps: removing heavy metals from the desulfurization waste water, adding lime and sodium sulfate to finally convert the desulfurization waste water into a calcium sulfate crystal seed and sodium chloride salt system, and then preparing high-purity sodium chloride salt by adopting a crystal seed evaporation crystallization technology;
in the existing mining enterprises, the mine water treatment system and the desulfurization wastewater treatment system are independently arranged and respectively operated, and are not related to each other.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a mine and power plant waste water cooperative processing system to reduce or avoid the aforementioned problem.
In order to solve the technical problem, the utility model provides a mine and power plant waste water cooperative treatment system, it includes mine water processing system and power plant waste water processing system, power plant waste water processing system includes crystal seed method evaporation crystallization device, crystal seed method evaporation crystallization device is provided with a medicament blending device through the tube coupling, the medicament blending device is provided with and is used for putting in the pipeline of the produced mine water mother liquor of mine water processing system.
Preferably, the agent blending device is a pool body constructed by concrete.
Preferably, the medicament dispensing device is a canister made of metal or carbon fibre material.
Preferably, the distance between the mine water treatment system and the power plant wastewater treatment system is not more than five kilometers, and the mine water treatment system is connected with the agent blending device through a pipeline.
Preferably, the distance between the mine water treatment system and the power plant wastewater treatment system is more than five kilometers, and a buffer pool is built outside the medicament blending device.
Preferably, the medicament dispensing device is provided with a sodium sulfate dosing port.
Preferably, a reaction clarification tank device is arranged between the medicament preparation device and the seed crystal method evaporative crystallization device.
Preferably, the reaction clarification tank device is connected with a sludge dewatering device.
Preferably, a pipeline for refluxing the centrifugal mother liquor is arranged between the seed crystal method evaporative crystallization device and the reaction clarification tank device.
Preferably, a pipeline for returning mother liquor generated by dehydration is arranged between the sludge dehydration device and the reaction clarification tank device.
The utility model provides a mine and power plant waste water cooperative processing system can save the device that is arranged in handling mine water mother liquor of successor in the current mine water treatment system on the one hand, and on the other hand can reduce to adopt the seed crystal method required seed crystal medicament cost of input among the power plant waste water treatment system to but greatly reduced water treatment's comprehensive cost, in addition, can also shift the chlorine salt of mine aquatic among the power plant waste water treatment system, thereby can deal with in coordination with the principal component chloride of desulfurization waste water, finally form the effective recycle of industrial salt product.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein the content of the first and second substances,
fig. 1 shows a schematic diagram of a mine and power plant wastewater co-treatment system according to an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.
Fig. 1 shows a schematic diagram of a mine and power plant wastewater co-treatment system according to an embodiment of the present invention. The trend of material has been marked with the arrow in the picture, it is shown with the reference to fig. 1, the utility model provides a mine and power plant waste water cooperative treatment system, it includes mine water processing system 1 and power plant waste water processing system 2, power plant waste water processing system 2 includes seed crystal method evaporation crystallization device, seed crystal method evaporation crystallization device is provided with a medicament blending device through the tube coupling, the medicament blending device is provided with and is used for putting in the pipeline of the produced mine water mother liquor of mine water processing system 1.
The inventor discovers through research that the concentrated mother liquor generated in the treatment process of mine water, particularly high-salinity mine water, usually comprises sodium sulfate, sodium chloride and trace potassium and nitrate, therefore, if a seed crystal method technology is used in a desulfurization wastewater treatment system adopted by a power plant matched with the mine, the mine water mother liquor can be used as a seed crystal blending agent for the pretreatment of seed crystal method crystallization, so that on one hand, a subsequent device for treating the mine water mother liquor in the existing mine water treatment system can be omitted, on the other hand, the cost of the seed crystal agent required to be added in the power plant wastewater treatment system 2 adopting the seed crystal method can be reduced, the comprehensive cost of water treatment can be greatly reduced, and in addition, chloride salt in the mine water can be transferred to the power plant wastewater treatment system 2, so that the chloride can be cooperatively treated with the main chloride of the desulfurization wastewater, finally, the industrial salt product is effectively recycled.
In order to utilize the mine water mother liquor, a reagent blending device can be arranged in front of a seed crystal method evaporation crystallization device in a battery desulfurization wastewater treatment system, the reagent blending device can be a tank body constructed by concrete or a tank body made of metal or carbon fiber and the like, and thus, the liquid in the tank body can be subjected to parameter measurement by arranging a corresponding concentration measurement module. If the distance between the mine water treatment system 1 and the power plant wastewater treatment system 2 is not more than five kilometers, a pipeline can be directly constructed from the mine water treatment system 1 to the reagent blending device, so that the mine water mother liquor generated by the mine water treatment system 1 can be directly conveyed to the reagent blending device, if the distance between the mine water treatment system 1 and the power plant wastewater treatment system 2 is more than five kilometers, a buffer pool (not shown in the figure) can be constructed outside the reagent blending device, and then the mine water mother liquor generated by the mine water treatment system 1 is conveyed to the buffer pool through transportation tools such as a tank car, so that the reagent blending device can conveniently call the mine water mother liquor in the buffer pool.
The distance range of five kilometres is empirical data obtained by the inventors in practical cases of multiple mines served by the applicant, that is, using pipe transport for not more than five kilometres and using vehicles for more than five kilometres, enabling the overall costs to be at a low level.
Because the existing mine water treatment system has different processes and treatment effects, the agent blending device can be further provided with a sodium sulfate feeding port, so that the concentration of the solution can be adjusted by feeding sodium sulfate according to different mine water mother solutions.
That is, in the chemical preparation device, in general, the content of sodium sulfate in the mine water mother liquor generated by the introduced mine water treatment system 1 is generally 3% to 20%, and the concentration of sodium chloride is a saturated solution corresponding to the proportion of the content of sodium sulfate. In order to meet the parameter requirements of the seed crystal method evaporation crystallization device, the concentration of sodium sulfate in the introduced mine water mother liquor can be adjusted by adding sodium sulfate, and under the normal condition, when the adjusted concentration of sodium sulfate is not lower than 15% and the total salt concentration is not higher than 25%, the seed crystal method evaporation crystallization device can be ensured to obtain a better medicament using effect. The concentrations referred to in this paragraph are mass concentrations.
As mentioned above, in the technical solution provided by the present invention, when the existing mine water treatment system 1 and power plant wastewater treatment system 2 are modified, it is only necessary to add the reagent blending device in the power plant wastewater treatment system 2 for adding the mine water mother liquor generated by the mine water treatment system 1, and the power plant wastewater treatment system 2 for treating the desulfurization wastewater may be the one provided by the prior art, such as chinese patents 201910791801.7, 201710527538.1, 201710708134.2, that is, a device (such as a crystallization reactor, not shown in the figure) for adding or generating the seed crystal is provided in the seed crystal evaporation crystallization device, so that the mine water mother liquor precipitated or adjusted by adding sodium sulfate in the reagent blending device can be directly added into the existing devices for adding or generating the seed crystal through a pipeline, thus being used as an additive of the desulfurization waste water (namely a medicament required by a crystal seed method), and entering a subsequent evaporation and crystallization process after being mixed with the desulfurization waste water.
Referring to fig. 1, a reaction clarifier device may be further disposed between the reagent preparing device and the seed crystal evaporation crystallization device, so that the reaction clarifier device may further wait for the reaction in the solution to be completed, that is, there is a buffer to facilitate the precipitation and separation of the solid produced by the reaction, the reaction clarifier device may be connected with a sludge dewatering device, the sludge dewatering device may be separately reset, or a centrifugal dewatering device for dewatering in the existing desulfurization wastewater treatment system may be utilized, so that calcium sulfate may be discharged as sludge and mixed with sludge in the front stage of desulfurization wastewater.
The technical scheme of the utility model, on the basis of the desulfurization waste water of power plant is handled to the seed crystal method evaporimeter, utilize the characteristics that contain the sodium sulfate and the sodium chloride salt of higher concentration in mine water mother liquor or miscellaneous salt, adopt the mine water mother liquor as the addition medicament of seed crystal method preliminary treatment, both can improve the concentration of desulfurization waste water main product sodium chloride salt like this, can utilize the sodium sulfate in the mine water mother liquor and the calcium salt (calcium chloride) reaction in the desulfurization waste water again, also convert the formation sodium chloride salt when taking off the hardness, seed crystal and high content sodium chloride salt solution system have finally been formed, just so be favorable to the higher industrial salt of seed crystal method evaporative crystallization preparation purity very much, discharge the produced calcium sulfate of reaction as mud simultaneously, and mix the processing together with the mud of desulfurization waste water anterior segment. That is, in the process of utilizing the mine water mother liquor, a certain amount of sodium sulfate salt can be added to react with calcium chloride to form a solution of a sodium chloride calcium sulfate system according to requirements, and then the industrial sodium chloride salt can be recovered and prepared by adopting a seed crystal method.
Referring to fig. 1, the seed crystal evaporation crystallization device and the reaction clarifier device may be provided with a pipeline for centrifugal mother liquor backflow, so that the mother liquor generated by the centrifugal device during the operation of the seed evaporation crystallization device can flow back to the reaction clarifier device to participate in medicament regulation.
Similarly, the sludge dewatering device and the reaction clarification tank device can be provided with a pipeline for returning mother liquor generated by dewatering, so that the mother liquor generated in the dewatering process can be further used for returning to the reaction clarification tank device to participate in medicament regulation.
It is to be understood by those skilled in the art that while the present invention has been described in terms of several embodiments, it is not intended that each embodiment cover a separate embodiment. The description is given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including all technical equivalents which are encompassed by the claims.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.
Claims (10)
1. The utility model provides a mine and power plant waste water cooperative processing system, its characterized in that, it includes mine water processing system and power plant waste water processing system, power plant waste water processing system includes crystal seed method evaporation crystallization device, crystal seed method evaporation crystallization device is provided with a medicament blending device through the tube coupling, medicament blending device is provided with and is used for putting in the pipeline of the produced mine water mother liquor of mine water processing system.
2. The mine and power plant wastewater co-treatment system of claim 1, wherein the agent blending device is a concrete constructed tank.
3. The mine and power plant wastewater co-treatment system of claim 1, wherein the agent-dispensing device is a canister made of metal or carbon fiber material.
4. The mine and power plant wastewater co-treatment system according to claim 1, wherein the distance between the mine water treatment system and the power plant wastewater treatment system is not more than five kilometers, and the mine water treatment system is connected with the agent blending device through a pipeline.
5. The mine and power plant wastewater co-treatment system of claim 1, wherein the distance between the mine water treatment system and the power plant wastewater treatment system is more than five kilometers, and a buffer tank is built outside the agent blending device.
6. The mine and power plant wastewater co-treatment system of claim 1, wherein the agent blending device is provided with a sodium sulfate feeding port.
7. The mine and power plant wastewater co-processing system as claimed in claim 1, wherein a reaction clarifier device is arranged between the chemical preparation device and the seed crystal method evaporative crystallization device.
8. The mine and power plant wastewater co-treatment system of claim 7, wherein the reaction clarifier apparatus is connected to a sludge dewatering apparatus.
9. The mine and power plant wastewater co-treatment system according to claim 7, wherein a pipeline for centrifugal mother liquor backflow is arranged between the seed crystal evaporative crystallization device and the reaction clarifier device.
10. The mine and power plant wastewater co-treatment system as claimed in claim 8, wherein a return line for mother liquor generated by dewatering is provided between the sludge dewatering device and the reaction clarifier device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020460886.9U CN212076473U (en) | 2020-04-01 | 2020-04-01 | Mine and power plant wastewater cooperative treatment system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020460886.9U CN212076473U (en) | 2020-04-01 | 2020-04-01 | Mine and power plant wastewater cooperative treatment system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112830600A (en) * | 2021-01-07 | 2021-05-25 | 北京朗新明环保科技有限公司 | Coal-electricity integrated wastewater recycling treatment device and method |
| CN112830599A (en) * | 2021-01-07 | 2021-05-25 | 北京朗新明环保科技有限公司 | Coal-electricity integrated wastewater pretreatment device and method |
| CN112979028A (en) * | 2021-01-07 | 2021-06-18 | 北京朗新明环保科技有限公司 | Coal-electricity integrated wastewater recycling intelligent treatment system and method |
-
2020
- 2020-04-01 CN CN202020460886.9U patent/CN212076473U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112830600A (en) * | 2021-01-07 | 2021-05-25 | 北京朗新明环保科技有限公司 | Coal-electricity integrated wastewater recycling treatment device and method |
| CN112830599A (en) * | 2021-01-07 | 2021-05-25 | 北京朗新明环保科技有限公司 | Coal-electricity integrated wastewater pretreatment device and method |
| CN112979028A (en) * | 2021-01-07 | 2021-06-18 | 北京朗新明环保科技有限公司 | Coal-electricity integrated wastewater recycling intelligent treatment system and method |
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