CN210367291U - Coal-containing wastewater treatment system - Google Patents
Coal-containing wastewater treatment system Download PDFInfo
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- CN210367291U CN210367291U CN201920883456.5U CN201920883456U CN210367291U CN 210367291 U CN210367291 U CN 210367291U CN 201920883456 U CN201920883456 U CN 201920883456U CN 210367291 U CN210367291 U CN 210367291U
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Abstract
The utility model discloses a coal-containing wastewater treatment system, which comprises a sedimentation tank, an adjusting tank, a mixer, an electric flocculation box, a clarification tank, a filter and a recycling tank; the sedimentation tank, the regulating tank, the mixer, the clarification tank, the filter and the recycling tank are sequentially communicated and connected, a first pump is arranged between the regulating tank and the mixer, and a second pump is arranged between the clarification tank and the filter; the mixer is connected with the electric flocculation box; and a plate electrode is arranged in the electric flocculation box and is connected with a power supply. The method aims to develop a new two-stage reaction precipitation coal water treatment system, changes the conventional route of electric flocculation treatment, and has the advantages of strong innovation, complete feasibility and low cost; can open up a new way for coal water treatment.
Description
Technical Field
The invention relates to the technical field of coal-containing wastewater treatment, in particular to a coal-containing wastewater treatment system.
Background
The coal-containing waste water is mainly characterized by high turbidity, fine solid particle size, more negative charges on the surface of solid particles, and the repulsion among the charges with the same polarity makes the particles keep a dispersed state in water and be influenced by gravity and Brownian motion. Due to the interaction (such as adsorption, dissolution, combination and the like) among solid particle interfaces in the coal slime water, the properties of the coal washing wastewater are quite complex, and the coal washing wastewater not only has the properties of suspension, but also has the properties of colloid.
Due to the reasons, the coal washing wastewater is difficult to naturally clarify, and the supernatant of the wastewater after precipitation is still black liquid with a large amount of suspended matters such as coal slime and the like, wherein the supernatant even contains various additives, heavy metals and other harmful substances in the coal preparation process. A large amount of coal washing wastewater is discharged out of the standard, so that water body pollution, pipeline silting and coal slime loss are caused, and huge pressure is caused to the environment.
At present, the coal-containing wastewater mainly adopts two treatment processes of coagulating sedimentation and electric flocculation: (1) as for the most traditional method, the PAC is added to ensure that the particles in water are condensed after destabilization, and then the PAM is added, bridging condensation is realized through the action of the macromolecular coagulant aid, the surface bonding strength of initial particles is enhanced, so that the internal bonding force of a bonding group is increased, the densification is realized, some discrete micro particles are captured, and the bonding group is increased, so that the suspended particles have large gravity and fast sedimentation, and the treatment efficiency is improved. Although a good effect is obtained, the PAC dosage is too large and salt ions such as chloride ions and the like can be carried in the water, so that the salt content of the circularly recycled coal washing water is gradually increased, and high-salt wastewater is finally generated, thereby increasing the burden of the operation management of a factory; (2) the pure electric flocculation treatment process can effectively destroy the stability of molecules, open the ring of cyclic molecules and break the chain of macromolecules, thereby greatly improving the biodegradability of wastewater. Especially for organic waste water with high concentration or containing biological toxic substances, electric flocculation can be used as a pretreatment measure, and the measure can effectively decompose or remove pollutants which are difficult to be biologically degraded in the waste water. The process has certain technical advantages in the aspects of heavy metal wastewater complex breaking treatment, oil-containing wastewater demulsification and oil removal, printing and dyeing wastewater decoloration and COD reduction, improvement on biodegradability of organic wastewater difficult to degrade, destabilization and sedimentation of fine suspended particles and the like, but the process has relatively poor adaptability to water quality fluctuation in the operation process, the setting of the operation current and voltage directly influences the quality of treated water, the requirement on the interval setting of electrode plates is very high, and the load is also increased for operation management.
Disclosure of Invention
In order to solve the problems, the invention discloses a coal water treatment system, which adopts a mode that coal water and electric flocculation are separately and independently operated. The treatment method is provided by providing a new coal-containing wastewater treatment process technical route on the basis of analyzing and researching the traditional dosing flocculation treatment process and the traditional electric flocculation treatment process, realizing engineering demonstration application, saving floor area, realizing full-automatic operation of the system, greatly saving labor cost and simultaneously not adding any chemical agent into the system. Therefore, the secondary pollution of water quality and sediments is not caused.
In order to achieve the above purpose, the invention provides the following technical scheme:
a coal-containing wastewater treatment system comprises a sedimentation tank, an adjusting tank, a mixer, an electric flocculation tank, a clarification tank, a filter and a recycling tank; the sedimentation tank, the regulating tank, the mixer, the clarification tank, the filter and the recycling tank are sequentially communicated and connected, a first pump is arranged between the regulating tank and the mixer, and a second pump is arranged between the clarification tank and the filter; the mixer is connected with the electric flocculation box; and a plate electrode is arranged in the electric flocculation box and is connected with a power supply. Electrolytic reaction is carried out to generate an electroflocculation body. Set up solitary electrochemistry system and carry out the electrolytic reaction of polar plate, generate the electric flocculation body, then enter into the blender and carry out abundant flocculation reaction, can generate the flocculation medicament of specific concentration through the adjustment of polar plate current voltage on the one hand, on the other hand can avoid the internal direct system that carries out flocculation reaction and cause of electric flocculation box to block up, is the problem of overcoming traditional chemistry flocculation system or electric flocculation system operation in-process promptly.
Further, the mixer comprises a mixer shell, a water inlet pipe, a water outlet pipe, an aerator pipe, a back washing assembly and a sludge discharge groove; a sludge discharge groove is formed in the bottom of the mixer shell, a sludge discharge valve is arranged on the sludge discharge groove, a water inlet pipe is arranged at the lower part of one side of the mixer shell, and a water outlet pipe is arranged at the upper part of the other side of the mixer shell; the water inlet pipe is connected with a first pump, the water inlet pipe is also connected with an electric flocculation box, the backwashing component comprises a cleaning water tank, a cleaning inlet pipe and a cleaning outlet pipe, the cleaning inlet pipe is connected with a water outlet pipe, the cleaning outlet pipe is connected with the water inlet pipe, and stop valves are arranged on the cleaning inlet pipe and the cleaning outlet pipe; the cleaning inlet pipe and the cleaning outlet pipe are both connected with the cleaning water tank. The bottom of the mixer is provided with a flushing and discharging pipeline and a valve. The system is flushed regularly, and system blockage caused by the sedimentation of the flocculation reactant can be avoided.
Further, the mixer is connected with a medicine feeding box, a chemical flocculant is arranged in the medicine feeding box, the medicine feeding box is connected with the mixer through a medicine feeding pipeline, and a valve is arranged on the medicine feeding pipeline; the chemical feeding pipeline is connected with a water inlet pipe. According to various water quality conditions of inflow water, an optional medicine adding unit is arranged at the mixer stage, under the condition that the water quality condition of the inflow water is poor, the concentration of a medicament of electrolysis produced water of an electrochemical system is not enough to provide a flocculating agent for removing system pollutants, a medicine adding device can be started to supplement and add medicines, the full occurrence of flocculation reaction is ensured, and the pollutants in a water body are removed.
Further, the filter comprises a filter box, a filter water inlet pipe, a filter water outlet pipe, a filter medium and a filter backwashing box; an overflow layer and a medium layer are arranged in the filter box from top to bottom, a grid isolation plate is arranged between the overflow layer and the medium layer, a central pipe is arranged in the filter box, the lower end of the central pipe is provided with an opening, the lower end of the central pipe penetrates through the grid isolation plate and is positioned in the medium layer, and the other end of the central pipe penetrates through a top plate of the filter box and is connected with a filter backwashing box; the top of the filter tank is provided with a filtering high-level water tank, the top of the filtering high-level water tank is connected with the regulating tank, and the bottom of the filtering high-level water tank is connected with one end of the filtering water inlet pipe; the other end of the filtering water inlet pipe is connected with a central pipe in the filter box; and an overflow outlet is arranged on the box body of the overflow layer, and the overflow outlet is communicated with and connected with a filtering water outlet pipe. After the wastewater enters the filtering high-level water tank, the wastewater enters the central pipe through the filtering water inlet pipe, then flows down from the central pipe and enters the filtering medium, after the wastewater is filtered in the filtering medium, the purified water enters the overflow layer from the isolation plate, and then enters the filtering water outlet pipe from the overflow outlet to be discharged. Meanwhile, the central pipe is also connected with a reverse cleaning box for reversely cleaning the medium layer.
Further, the filter is a multi-medium filter, and one or two of anthracite filter media and quartz sand filter media are arranged in the filter. The filter medium of the multi-medium filter system is not influenced by grease, and a certain amount of anthracite in the medium can adsorb and remove most of oil, so that the oil content of the effluent is reduced, and the cost is low.
Further, the clarification tank is a vertical sedimentation tank, and the vertical sedimentation tank comprises a sedimentation tank box, a conical sedimentation sludge tank, a clarification water inlet pipe, a clarification water outlet pipe, a cyclone pipe and an intermediate water tank; the sedimentation tank incasement is equipped with middle pond, the below in middle pond is equipped with the toper and deposits the mud groove, be equipped with the cyclone tube in the middle pond, the upper end of cyclone tube is located the top in middle pond, clarification inlet tube is connected to upper end one side of cyclone tube, clarification inlet tube is located middle pond top, the lower extreme opening setting of cyclone tube, the top in middle pond is equipped with the overflow mouth, the overflow mouth communicates with each other and connects the clarification outlet pipe.
Furthermore, an intermediate water tank is arranged between the clarification tank and the filter. The middle water tank plays a role in secondary clarification and buffering.
The invention also discloses a coal water treatment method adopting the coal-containing wastewater treatment system, which comprises the following process steps:
firstly, coal-containing wastewater enters a sedimentation tank through a raw water pump with liquid level control and is precipitated in the sedimentation tank;
secondly, the sediment enters a regulating tank;
thirdly, the mixture enters a mixer through a first pump after being regulated, meanwhile, the mixer is communicated with an electric flocculation box, a plate electrode in the electric flocculation box is connected with a power supply, and the plate electrode performs an electrolytic reaction to generate an electric flocculating constituent; the electrolyte in the electric flocculation box enters a mixer, and an electric flocculating body in the mixer is mixed with the wastewater for flocculation;
fourthly, the wastewater after the flocculation treatment enters a clarification tank, the clarification tank is kept stand for clarification, an upper clarified liquid enters an intermediate water tank, and a lower precipitate is discharged;
fifthly, performing secondary clarification in the intermediate water tank, and filtering in a filter after the secondary clarification; a filter medium is arranged in the filter to obtain clear water;
and sixthly, sending the filtered clean water into a recycling pool, and recycling the clean water in the system.
Further, the regulating reservoir is a homogenizing reservoir.
Furthermore, a back washing device and a slag discharging device are arranged in the filter. The filter can be sent into the system for recycling after automatic back washing and slag discharging, and the whole process does not need to add chemical agents except for properly adjusting the PH value according to the needs.
An electrochemical flocculation treatment system (electric flocculation tank) is a process of breaking the stable state of suspended, floating or dissolved pollutants in water by introducing current into the water, and the electric energy generated by the current introduced into the water drives chemical reaction between substances. When a chemical reaction is driven or forced on, the various components and compounds will tend to find the most stable state under the action of an electric current. Generally, this tendency to steady state results in a solid-like material: such solid materials will be present in a non-colloidal or non-dissolved state and thus are easily removed by inferior separation techniques.
The centrifugal settling system (clarifying tank) adopts the centrifugal principle in hydraulics, and water flow enters the reactor along the tangential direction and makes spiral motion. Under the action of centrifugal force, the non-polar particles treated by the electrochemical flocculation system and the centrifugal precipitation unit are attached to the wall of the reactor, and under the action of gravity, the separated particles fall against water and are finally accumulated in a container below, and sludge is discharged through an automatic valve controlled by the system. The water after centrifugal separation overflows from the upper end of the reactor to an intermediate water tank.
The invention has the following beneficial effects:
the method aims to develop a new two-stage reaction precipitation coal water treatment system, changes the conventional route of electric flocculation treatment, and has the advantages of strong innovation, complete feasibility and low cost; can open up a new way for coal water treatment.
(1) Develop two-stage reaction and filter coal water processing system, both set up solitary electrochemistry system and carry out the electrolytic reaction of polar plate, generate the flocculation medicament, then enter into the blender and carry out abundant flocculation reaction, can generate the flocculation medicament of specific concentration through the adjustment of polar plate current-voltage on the one hand, on the other hand can avoid the electric flocculation box in directly carry out the system that flocculation reaction caused and block up, overcome the problem that traditional chemistry flocculation system or electric flocculation system operation in-process exist promptly.
(2) A flushing discharge pipeline and a valve are arranged at the bottom end of the mixer, and the system flushing is carried out at regular intervals, so that the system blockage caused by the sedimentation of the flocculation reactant can be avoided;
(3) according to various water quality conditions of inlet water, the reaction system is provided with an optional drug adding unit at the mixer stage, under the condition of poor water quality conditions of the inlet water, the concentration of a drug in electrolysis water produced by an electrochemical system is not enough to provide a flocculating agent for removing system pollutants, a drug adding device can be started to supplement and add drugs, the full occurrence of flocculation reaction is ensured, and the pollutants in a water body are removed;
(4) the high-turbidity coal-containing wastewater of the coal-fired power plant is connected into the device after simple pre-precipitation, the turbidity of the effluent reaches below 10NTU after electrochemical flocculation, precipitation and filtration, and meanwhile, the device can replace the original old process of adding a flocculating agent and a coagulant aid, meet the intelligent unattended effect, not introduce anions, and not increase the salt content of water, and meet the recycling of the coal-containing wastewater.
(5) Aiming at the characteristic of wide variation range of the turbidity of the incoming water of the coal-containing wastewater, a high-frequency pulse power supply system capable of automatically increasing or reducing the electrolytic current according to the turbidity of the incoming water is developed, so that the aims of energy conservation and unattended operation are fulfilled.
Drawings
FIG. 1 is a diagram of a coal-containing wastewater treatment system.
FIG. 2 is a schematic diagram of the mixer of the present invention;
FIG. 3 is a left side view of the mixer of the present invention;
FIG. 4 is a right side view of the mixer of the present invention;
FIG. 5 is a schematic view of the structure of a vertical sedimentation tank of the present invention;
FIG. 6 is a top view of a vertical sedimentation tank of the present invention;
FIG. 7 is a schematic view of the internal structure of the vertical sedimentation tank of the present invention;
FIG. 8 is a top view of a vertical sedimentation tank of the present invention;
fig. 9 is a schematic view of the filter structure of the present invention.
In the figure: the device comprises a mixer 100, a mixer shell 1, a water inlet pipe 2, a water outlet pipe 3, an aerator pipe 4, a backwashing assembly 5, a cleaning water tank 51, a cleaning inlet pipe 52, a cleaning outlet pipe 53, a sludge discharge tank 6, an electric flocculation tank 7, a drug adding tank 8, a filter 200, a filter tank 9, a filtering water inlet pipe 10, a filtering water outlet pipe 11, a filter medium 12, a filtering backwashing tank 13, an overflow layer 901, a medium layer 902, a grid isolation plate 14, a central pipe 15, a clarification tank 300, a sedimentation tank 16, a conical sedimentation tank 17, a clarification water inlet pipe 18, a clarification water outlet pipe 19, a cyclone pipe 20, a middle water tank 21, a filtering high-level water tank 22, a vertical grabbing ladder 23 and a sludge discharge valve 24.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.
Example 1
A coal-containing wastewater treatment system as shown in fig. 1-9, comprising a sedimentation tank, a regulating tank, a mixer, an electric flocculation tank, a clarification tank, a filter and a recycling tank; the sedimentation tank, the regulating tank, the mixer, the clarification tank, the filter and the recycling tank are sequentially communicated and connected, a first pump is arranged between the regulating tank and the mixer, and a second pump is arranged between the clarification tank and the filter; the mixer is connected with the electric flocculation box; the inside of the electric flocculation box is provided with a plate electrode which is connected with a power supply to perform electrolytic reaction to generate an electric flocculation body. Set up solitary electrochemistry system and carry out the electrolytic reaction of polar plate, generate the electric flocculation body, then enter into the blender and carry out abundant flocculation reaction, can generate the flocculation medicament of specific concentration through the adjustment of polar plate current voltage on the one hand, on the other hand can avoid the internal direct system that carries out flocculation reaction and cause of electric flocculation box to block up, is the problem of overcoming traditional chemistry flocculation system or electric flocculation system operation in-process promptly.
As shown in fig. 2-4, in the present embodiment, the mixer includes a mixer housing 1, a water inlet pipe 2, a water outlet pipe 3, an aeration pipe 4, a backwashing assembly 5, and a sludge discharge tank 6; a sludge discharge groove is formed in the bottom of the mixer shell, a sludge discharge valve is arranged on the sludge discharge groove, a water inlet pipe is arranged at the lower part of one side of the mixer shell, and a water outlet pipe is arranged at the upper part of the other side of the mixer shell; the water inlet pipe is connected with the first pump, the water inlet pipe is also connected with the electric flocculation box 7, the backwashing component comprises a cleaning water tank 51, a cleaning inlet pipe 52 and a cleaning outlet pipe 53, the cleaning inlet pipe is connected with the water outlet pipe, the cleaning outlet pipe is connected with the water inlet pipe, and stop valves are arranged on the cleaning inlet pipe and the cleaning outlet pipe; the cleaning inlet pipe and the cleaning outlet pipe are both connected with a cleaning water tank; an aeration pipe is arranged at the bottom of the mixer shell. The bottom of the mixer is provided with a flushing and discharging pipeline and a valve. The system is flushed regularly, and system blockage caused by the sedimentation of the flocculation reactant can be avoided. The waste water enters from the water inlet pipe, is mixed in the aeration process of the aeration pipe, and overflows from the water outlet pipe at the top after being mixed.
In this embodiment, an intermediate tank is provided between the clarifier and the filter. The middle water tank plays a role in secondary clarification and buffering.
In this embodiment, the mixer is connected with a medicine feeding box 8, a chemical flocculant is arranged in the medicine feeding box, the medicine feeding box is connected with the mixer through a medicine feeding pipeline, and a valve is arranged on the medicine feeding pipeline; the chemical feeding pipeline is connected with a water inlet pipe. According to various water quality conditions of inflow water, an optional medicine adding unit is arranged at the mixer stage, under the condition that the water quality condition of the inflow water is poor, the concentration of a medicament of electrolysis produced water of an electrochemical system is not enough to provide a flocculating agent for removing system pollutants, a medicine adding device can be started to supplement and add medicines, the full occurrence of flocculation reaction is ensured, and the pollutants in a water body are removed.
As shown in fig. 9, in the present embodiment, the filter 200 includes a filter tank 9, a filter water inlet pipe 10, a filter water outlet pipe 11, a filter medium 12, and a filter backwashing tank 13; an overflow layer 901 and a medium layer 902 are arranged in the filter box from top to bottom, a grid isolation plate 14 is arranged between the overflow layer and the medium layer, a central pipe 15 is arranged in the filter box, the lower end of the central pipe is opened, the lower end of the central pipe penetrates through the grid isolation plate and is positioned in the medium layer, and the other end of the central pipe penetrates through a top plate of the filter box and is connected with a filter backwashing box; the top of the filter tank is provided with a filtering high-level water tank 22, the top of the filtering high-level water tank is connected with the regulating tank, and the bottom of the filtering high-level water tank is connected with one end of the filtering water inlet pipe; the other end of the filtering water inlet pipe is connected with a central pipe in the filter box; the overflow outlet is arranged on the box body of the overflow layer and is communicated with the filtering water outlet pipe. After the wastewater enters the filtering high-level water tank, the wastewater enters the central pipe through the filtering water inlet pipe, then flows down from the central pipe and enters the filtering medium, after the wastewater is filtered in the filtering medium, the purified water enters the overflow layer from the isolation plate, and then enters the filtering water outlet pipe from the overflow outlet to be discharged. Meanwhile, the central pipe is also connected with a reverse cleaning box for reversely cleaning the medium layer.
As shown in fig. 5-8, in the present embodiment, the clarification tank 300 is a vertical sedimentation tank, and the vertical sedimentation tank includes a sedimentation tank box 16, a conical sedimentation sludge tank 17, a clarification water inlet pipe 18, a clarification water outlet pipe 19, a cyclone pipe 20, and an intermediate water tank 21; the sedimentation tank incasement is equipped with middle pond, and the below in middle pond is equipped with the toper and deposits the mud groove, is equipped with the whirl pipe in the middle pond, and the upper end of whirl pipe is located the top in middle pond, and the clarification inlet tube is connected to upper end one side of whirl pipe, and the clarification inlet tube is located middle pond top, and the lower extreme opening of whirl pipe sets up, and the top in middle pond is equipped with the overflow mouth, and the overflow mouth communicates with each other and connects the clarification outlet pipe. In this embodiment, there are 4 bottom conical settling tanks, and a sludge discharge valve 24 is provided at the bottom of each tank. After the wastewater enters from the water inlet pipe, the wastewater is subjected to rotational flow through the rotational flow pipe, sludge and particles in the wastewater are subjected to centrifugal sedimentation and gravity sedimentation in the rotational flow pipe of the spiral, so that the particles enter the sedimentation mud tank, and clear water overflows from an overflow port of the central water tank and enters the water outlet pipe to be discharged. In this embodiment, a vertical ladder 23 is further provided at one side of the vertical sedimentation tank. The climbing and maintenance are convenient. The spiral-flow pipe is spiral, makes things convenient for sewage to get into back and carries out centrifugal motion.
In this embodiment, the filter is a multi-media filter, and one or two of anthracite filter media and quartz sand filter media are disposed in the filter. The filter medium of the multi-medium filter system is not influenced by grease, and a certain amount of anthracite in the medium can adsorb and remove most of oil, so that the oil content of the effluent is reduced, and the cost is low.
Example 2
The coal-containing wastewater treatment system of example 1 was used to treat coal-containing wastewater, and the treatment method included the following process steps:
firstly, coal-containing wastewater enters a sedimentation tank through a raw water pump with liquid level control and is precipitated in the sedimentation tank;
and step two, the obtained product enters a regulating tank after precipitation treatment. The adjusting tank is a homogenizing tank, and is used for homogenizing and adjusting in the homogenizing tank;
thirdly, the mixture enters a mixer through a first pump after being regulated, meanwhile, the mixer is communicated with an electric flocculation box, a plate electrode in the electric flocculation box is connected with a power supply, and the plate electrode performs an electrolytic reaction to generate an electric flocculating constituent; the electrolyte in the electric flocculation box enters a mixer, and an electric flocculating body in the mixer is mixed with the wastewater for flocculation;
fourthly, the wastewater after the flocculation treatment enters a clarification tank, the clarification tank is kept stand for clarification, an upper clarified liquid enters an intermediate water tank, and a lower precipitate is discharged;
fifthly, performing secondary clarification in the intermediate water tank, and filtering in a filter after the secondary clarification; a filter medium is arranged in the filter to obtain clear water;
and sixthly, sending the filtered clean water into a recycling pool, and recycling the clean water in the system.
In this embodiment, a back washing device and a slag discharge device are provided in the filter. The filter can be sent into the system for recycling after automatic back washing and slag discharging, and the whole process does not need to add chemical agents except for properly adjusting the PH value according to the needs.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.
Claims (7)
1. A coal-containing wastewater treatment system is characterized in that: comprises a sedimentation tank, an adjusting tank, a mixer, an electric flocculation box, a clarification tank, a filter and a recycling tank; the sedimentation tank, the regulating tank, the mixer, the clarification tank, the filter and the recycling tank are sequentially communicated and connected, a first pump is arranged between the regulating tank and the mixer, and a second pump is arranged between the clarification tank and the filter; the mixer is connected with the electric flocculation box; and a plate electrode is arranged in the electric flocculation box and is connected with a power supply.
2. The coal-containing wastewater treatment system according to claim 1, wherein: the mixer comprises a mixer shell, a water inlet pipe, a water outlet pipe, an aeration pipe, a back washing component and a sludge discharge groove; a sludge discharge groove is formed in the bottom of the mixer shell, a sludge discharge valve is arranged on the sludge discharge groove, a water inlet pipe is arranged at the lower part of one side of the mixer shell, and a water outlet pipe is arranged at the upper part of the other side of the mixer shell; the water inlet pipe is connected with a first pump, the water inlet pipe is also connected with an electric flocculation box, the backwashing component comprises a cleaning water tank, a cleaning inlet pipe and a cleaning outlet pipe, the cleaning inlet pipe is connected with a water outlet pipe, the cleaning outlet pipe is connected with the water inlet pipe, and stop valves are arranged on the cleaning inlet pipe and the cleaning outlet pipe; the cleaning inlet pipe and the cleaning outlet pipe are both connected with the cleaning water tank.
3. The coal-containing wastewater treatment system according to claim 2, characterized in that: the mixer is connected with a medicine feeding box, a chemical flocculant is arranged in the medicine feeding box, the medicine feeding box is connected with the mixer through a medicine feeding pipeline, and a valve is arranged on the medicine feeding pipeline; the chemical feeding pipeline is connected with a water inlet pipe.
4. The coal-containing wastewater treatment system according to claim 1, wherein: the filter comprises a filter box, a filter water inlet pipe, a filter water outlet pipe, a filter medium and a filter backwashing box; an overflow layer and a medium layer are arranged in the filter box from top to bottom, a grid isolation plate is arranged between the overflow layer and the medium layer, a central pipe is arranged in the filter box, the lower end of the central pipe is provided with an opening, the lower end of the central pipe penetrates through the grid isolation plate and is positioned in the medium layer, and the other end of the central pipe penetrates through a top plate of the filter box and is connected with a filter backwashing box; the top of the filter tank is provided with a filtering high-level water tank, the top of the filtering high-level water tank is connected with the regulating tank, and the bottom of the filtering high-level water tank is connected with one end of the filtering water inlet pipe; the other end of the filtering water inlet pipe is connected with a central pipe in the filter box; and an overflow outlet is arranged on the box body of the overflow layer, and the overflow outlet is communicated with and connected with a filtering water outlet pipe.
5. The coal-containing wastewater treatment system according to claim 4, wherein: the filter is a multi-medium filter, and one or two of anthracite filter media and quartz sand filter media are arranged in the filter.
6. The coal-containing wastewater treatment system according to claim 1, wherein: the clarification tank is a vertical flow sedimentation tank, and the vertical flow sedimentation tank comprises a sedimentation tank box, a conical sedimentation mud tank, a clarification water inlet pipe, a clarification water outlet pipe, a cyclone pipe and an intermediate water tank; the sedimentation tank incasement is equipped with middle pond, the below in middle pond is equipped with the toper and deposits the mud groove, be equipped with the cyclone tube in the middle pond, the upper end of cyclone tube is located the top in middle pond, clarification inlet tube is connected to upper end one side of cyclone tube, clarification inlet tube is located middle pond top, the lower extreme opening setting of cyclone tube, the top in middle pond is equipped with the overflow mouth, the overflow mouth communicates with each other and connects the clarification outlet pipe.
7. The coal-containing wastewater treatment system according to claim 1, wherein: an intermediate water tank is arranged between the clarification tank and the filter.
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| CN201920883456.5U CN210367291U (en) | 2019-06-13 | 2019-06-13 | Coal-containing wastewater treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110228876A (en) * | 2019-06-13 | 2019-09-13 | 北京朗新明环保科技有限公司南京分公司 | A kind of coal-contained wastewater processing system and its method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110228876A (en) * | 2019-06-13 | 2019-09-13 | 北京朗新明环保科技有限公司南京分公司 | A kind of coal-contained wastewater processing system and its method |
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