Environment-friendly desulfurization wastewater treatment device for coal-fired power plant

Abstract

The utility model discloses an environment-friendly desulfurization wastewater treatment device for a coal-fired power plant, and relates to the technical field of industrial wastewater treatment. The device comprises a reaction tank, a stirring assembly is installed inside the reaction tank and comprises a motor and a rotating rod arranged at the shaft end of the motor, a stirring plate is further installed on the outer wall of the rotating rod, the reaction tank is connected with a sludge lifting pump through a discharging pipe, and the sludge lifting pump is further connected with a distributing device in the treatment tank; a treatment assembly is further erected in the treatment tank and comprises a conical hopper, a micropore stainless steel sintering filter hopper is embedded in the bottom of the conical hopper, and the vacuum buffer tank is further connected with a vacuum pump. By utilizing the reaction tank and the stirring assembly arranged in the reaction tank, the fly ash is added while the wastewater is added, so that Cl <-> ions, F <-> ions and heavy metal ions in the wastewater are adsorbed, and then the ash-water mixture is filtered by utilizing the matching of the treatment tank and the vacuum pump.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial wastewater treatment, in particular to an environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant. Background Art

[0002] Coal-fired power plants generate a lot of industrial wastewater during production activities, and desulfurization wastewater is the most difficult industrial wastewater to treat in the entire power plant system. Desulfurization wastewater is mainly the discharge water after the limestone / gypsum wet desulfurization process of coal-fired power plants. It has high salt content and complex water quality composition, and contains a large amount of suspended solids, chloride ions (Cl - ), fluoride and various trace heavy metal ions are one of the key factors restricting the realization of "zero discharge" of power plant wastewater. The existing three-unit process treatment efficiency of most power plants is not high, and some new desulfurization wastewater zero discharge processes are too expensive and have a low commissioning rate. Therefore, a treatment device with good economic and environmental protection effect is needed to treat desulfurization wastewater and reuse it or discharge it in compliance with standards.

[0003] A Chinese patent application (or patent) with announcement number CN220684928U discloses a triple-box device for treating desulfurization wastewater, which is applied in the technical field of triple-box devices. The utility model sets a water flow entering through a water inlet pipe to impact a water flow blade and cause the rotating shaft to start rotating. The rotation of the rotating shaft will drive the second bevel gear to rotate through the first bevel gear, and the second bevel gear will drive the gear to rotate through the rotating rod. The gear will drive the rotating plate through the ring gear to drive the flow channel to rotate at the bottom of the partition plate. The device has the function of automatically adjusting the speed at which the liquid medicine enters the box according to the speed at which the wastewater enters, avoiding the problem of excessive one-time input of the liquid medicine causing the wastewater to be unable to be completely mixed with the liquid medicine, thereby greatly improving the practicality of the device; by setting a servo motor to drive the stirring rod to rotate quickly, the bottom of the box is flushed and cleaned, and finally the residue is discharged from the sewage pipe, effectively improving the efficiency of the subsequent box in treating sewage, while improving the service life of the device, greatly improving the applicability of the device.

[0004] The above-mentioned triple-tank device for treating desulfurized wastewater requires the addition of liquid medicine to treat the wastewater in the box, and the liquid medicine used to treat the wastewater is a consumable. The wastewater is not only large in volume but also continuously produced as production proceeds, which will cause a large amount of liquid medicine consumption and increase production costs; and it temporarily stores the wastewater through the box, and puts liquid medicine for wastewater treatment into the box. During the contact between the liquid medicine and the wastewater, more particulate matter will be generated, and some of the particulate matter will be adsorbed on the inner wall of the box and difficult to remove. To this end, we provide an environmentally friendly desulfurized wastewater treatment device for coal-fired power plants to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide an environmentally friendly desulfurization wastewater treatment device for coal-fired power plants, which uses a reaction tank and a stirring assembly arranged therein to add fly ash while adding wastewater to achieve Cl treatment of wastewater. - Ion, F - The ions and heavy metal ions are adsorbed, and then the gray water mixture is filtered by using the cooperation of the treatment tank and the vacuum pump, thereby solving the problems of the existing three-tank device for desulfurization wastewater treatment.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is an environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant, comprising a reaction tank; a stirring assembly is installed inside the reaction tank, the stirring assembly comprises a motor and a rotating rod arranged on the shaft end thereof, a stirring plate is also installed on the outer wall of the rotating rod, the reaction tank is connected to a sludge lifting pump through a discharge pipe, and the sludge lifting pump is also connected to a distributor in the treatment tank;

[0008] A processing assembly is also installed inside the processing tank, and the processing assembly includes a conical bucket, and a microporous stainless steel sintered filter bucket is embedded in the bottom of the conical bucket, and a cleaning water pipe is also embedded on the inner wall of the conical bucket. At the same time, the side wall of the processing tank is also connected to the vacuum buffer tank, and the vacuum buffer tank is connected to the vacuum pump.

[0009] The utility model is further configured that the top cover of the reaction tank is provided with a tank cover, and a wastewater feed pipe and a fly ash feed pipe are embeddedly installed on the tank cover, and the wastewater feed pipe and the fly ash feed pipe are symmetrically arranged on both sides of the center point of the tank cover.

[0010] The utility model is further configured such that the motor in the stirring assembly is arranged above the tank cover, and the motor is detachably mounted on the outer wall at the center of the tank cover through a frame, and the shaft end of the motor is synchronously rotatedly connected with a rotating rod arranged in the reaction tank through a coupling.

[0011] The utility model is further configured such that the rotating rod is arranged on the central axis of the reaction tank, and a mounting groove is opened on the outer wall of the rotating rod, and there are four mounting grooves in total, and the four mounting grooves are arranged on the outer wall of the rotating rod in a circular array structure, and the mounting grooves and the stirring plates are arranged one by one.

[0012] The utility model is further configured that the two axial ends of the sludge lifting pump are respectively provided with a pump feed pipe and a pump discharge pipe, the sludge lifting pump is connected with the discharge pipe through the pump feed pipe, and the sludge lifting pump is connected with the distribution pipe on the distributor through the pump discharge pipe.

[0013] The utility model is further configured that the top cover of the processing tank is provided with a cover plate, the distribution pipe is embedded in the center of the cover plate, and the distributor is arranged on the bottom side wall of the cover plate.

[0014] The utility model is further configured that an output pipe connected to the bottom side wall of the processing tank is threadedly connected, a cleaning groove is opened on the top inner wall of the conical bucket, and the conical bucket is clamped with the cleaning water pipe through the cleaning groove.

[0015] The utility model is further configured such that a discharge pipe is welded to the bottom of the microporous stainless steel sintered filter bucket, and the discharge pipe passes through the bottom side wall of the reaction tank and extends out, a pressure relief pipe and a pressure pipe are threadedly connected to the top of the vacuum buffer tank, and the vacuum buffer tank is connected to the processing tank through the pressure pipe.

[0016] The utility model has the following beneficial effects:

[0017] 1. The utility model sets a reaction tank, and the reaction tank is provided with a wastewater feeding pipe and a fly ash feeding pipe. Wastewater is input through the wastewater feeding pipe, and fly ash is input through the fly ash feeding pipe. Fly ash is a derivative in the production link, and no additional reagent is required. The wastewater is fully combined with the fly ash to form an ash-water mixture through a stirring component. In this process, the wastewater and the fly ash undergo adsorption reaction and Cl - Ion, F - Ions and heavy metal ions are removed by adsorption.

[0018] 2. The utility model sets a treatment tank and a vacuum pump. The ash-water mixture is transported to the microporous stainless steel sintered filter bucket in the treatment tank through the sludge pump, and then the treatment tank is vacuum treated by the vacuum pump, so that the ash-water mixture in the microporous stainless steel sintered filter bucket is vacuum filtered, the filtration speed is fast, the filtration time is greatly shortened, and chloride salts are further precipitated, which can greatly increase the salting out amount of high-concentration chloride ions and achieve high chloride ion removal efficiency. The discharge port at the bottom of the tank body can directly discharge the filtered fly ash and load it for transportation and disposal, which is conducive to the reuse of fly ash and effectively promotes the better realization of zero discharge of desulfurization wastewater.

[0019] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 The schematic diagram is a structural diagram of an environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant.

[0022] Figure 2 It is a structural side section view of an environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant.

[0023] Figure 3 This is the structural disassembly diagram of the reaction tank.

[0024] Figure 4 This is a structural disassembly diagram of the treatment tank.

[0025] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0026] 1-reaction tank, 101-wastewater feed pipe, 102-fly ash feed pipe, 103-tank cover, 2-stirring assembly, 201-motor, 202-rotating rod, 202a-installation groove, 203-stirring plate, 3-discharge pipe, 4-sludge lifting pump, 401-pump feed pipe, 402-pump discharge pipe, 5-treatment tank, 501-cover plate, 501a-distributor pipe, 501b-distributor, 502-output pipe, 503-treatment assembly, 503a-conical bucket, 503a-1-cleaning tank, 503b-cleaning water pipe, 503c-microporous stainless steel sintered filter bucket, 503c-1-discharge pipe, 6-vacuum buffer tank, 601-pressure relief pipe, 602-pressure pipe, 7-vacuum pump. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment 1

[0029] See also Figure 1-3 The utility model is an environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant, comprising a reaction tank 1 and a stirring assembly 2 arranged therein, through which the wastewater and fly ash entering the reaction tank can be fully stirred to form an ash-water mixture.

[0030] Specifically, a wastewater feed pipe 101 for wastewater supply and a fly ash feed pipe 102 for fly ash supply are provided on the tank cover 103 on the top of the reaction tank 1, and a stirring assembly 2 is also provided in the reaction tank 1. The stirring assembly 2 includes a motor 201 and a rotating rod 202 arranged on the end of its shaft, and a stirring plate 203 is also installed on the outer wall of the rotating rod 202, and a discharge pipe 3 for connecting to the pump feed pipe 401 in the sludge lifting pump 4 is also provided at the bottom of the reaction tank 1.

[0031] Furthermore, the motor 201 is detachably fixed on the outer top of the tank cover 103 through a frame, and the rotating rod 202 is arranged on the central axis position inside the reaction tank 1. At the same time, four mounting grooves 202a distributed in a circular array structure are opened on the outer wall of the rotating rod 202, and the rotating rod 202 is detachably fixedly connected to the stirring plate 203 through the mounting grooves 202a.

[0032] The operation process of this embodiment is: wastewater is fed into the reaction tank 1 through the wastewater feed pipe 101. When the amount of wastewater in the reaction tank 1 reaches the set value, the fly ash is fed through the fly ash feed pipe 102 to deliver the measured fly ash. At the same time, the stirring component 2 stirs at a set speed and reacts for 1 to 2 hours. After the reaction is completed, the valve on the discharge pipe 3 is opened, and the ash-water mixture is evenly fed into the distributor 501b through the pump discharge pipe 402 through the distribution pipe 501a via the sludge lifting pump 4. Specific embodiment 2

[0034] See also Figure 4 On the basis of the specific embodiment 1, a processing tank 5 is further provided. The gray-water mixture entering the processing tank 5 is filtered by utilizing the cooperation of the conical bucket 503a and the microporous stainless steel sintered filter bucket 503c in the processing tank 5, and the filtering speed is further improved under the vacuum pressure supply of the vacuum pump 7.

[0035] Specifically, a distribution pipe 501a is inserted into the cover plate 501 on the top of the processing tank 5, and a distributor 501b is also provided at the end of the distribution pipe 501a, and a processing assembly 503 is also provided inside the processing tank 5, and the processing assembly 503 includes a conical bucket 503a, and a microporous stainless steel sintered filter bucket 503c clamped at the bottom thereof, and a clean water pipe 503b is also embedded on the inner wall of the conical bucket 503a, and an output pipe 502 for outputting fly ash is also embedded at the bottom of the processing tank 5, and the processing tank 5 next to the conical bucket 503a is connected to the vacuum buffer tank 6 through a pressure pipe 602, and the vacuum buffer tank 6 is also connected to the vacuum pump 7.

[0036] Furthermore, the distributor 501b is arranged on the bottom side wall of the cover plate 501, and the conical bucket 503a is arranged horizontally in the middle and upper position of the processing tank 5, and a cleaning groove 503a-1 for clamping the cleaning water pipe 503b is opened on the inner wall of the middle and upper part of the conical bucket 503a, and the water inlet end of the cleaning water pipe 503b passes through the side wall of the processing tank 5 and extends out, and self-pressurized flushing nozzles are installed at equal intervals on the inner wall of the cleaning water pipe 503b, and a discharge pipe 503c-1 is threadedly connected to the bottom side wall of the microporous stainless steel sintered filter bucket 503c, and the discharge pipe 503c-1 passes through the bottom side wall of the processing tank 5 and extends out, and a pressure relief pipe 601 for pressure regulation is also embedded on the top of the vacuum buffer tank 6.

[0037] The operation process of this embodiment is as follows: the backwater mixture is evenly distributed to the conical bucket 503a and the microporous stainless steel sintered filter bucket 503c through the distributor 501b for vacuum filtration. Under high-speed filtration conditions, high-concentration chloride salts are precipitated and trapped in the microporous stainless steel sintered filter bucket 503c together with fly ash particles, and the clear liquid enters the lower part of the processing tank 5. After the filtration is completed, the vacuum pump 7 is stopped, the valve on the pressure pipe 602 is closed, the pressure relief valve on the pressure relief pipe 601 is opened, and the output pipe 502 is opened. The valve on the top can discharge the clear liquid to the designated place through the output pipe 502. The clear liquid can be discharged in compliance with the standards or recycled. The valve on the discharge pipe 503c-1 can be opened to release the filtered fly ash and load it onto a truck for transportation and disposal or reuse. If there is blockage on the microporous stainless steel sintered filter bucket 503c, the valve at the water inlet end of the cleaning water pipe 503b can be opened, and clean water will enter the interior of the water washing water pipe 503, and the conical bucket 503a and the microporous stainless steel sintered filter bucket 503c can be cleaned through the self-pressurized flushing nozzle.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant, comprising a reaction tank (1); characterized in that: The reaction tank (1) is provided with a stirring assembly (2), the stirring assembly (2) comprising a motor (201) and a rotating rod (202) arranged on the shaft end thereof, and a stirring plate (203) is also installed on the outer wall of the rotating rod (202). The reaction tank (1) is connected to a sludge lifting pump (4) via a discharge pipe (3), and the sludge lifting pump (4) is also connected to a distributor (501b) in a treatment tank (5); A processing assembly (503) is also arranged inside the processing tank (5), and the processing assembly (503) includes a conical bucket (503a), and a microporous stainless steel sintered filter bucket (503c) is embedded in the bottom of the conical bucket (503a), and a cleaning water pipe (503b) is also embedded on the inner wall of the conical bucket (503a). At the same time, the side wall of the processing tank (5) is also connected to the vacuum buffer tank (6), and the vacuum buffer tank (6) is connected to the vacuum pump (7).

2. The environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant according to claim 1 is characterized in that: The top cover of the reaction tank (1) is provided with a tank cover (103), and a wastewater feed pipe (101) and a fly ash feed pipe (102) are embedded in the tank cover (103), and the wastewater feed pipe (101) and the fly ash feed pipe (102) are symmetrically arranged on both sides of the center point of the tank cover (103).

3. The environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant according to claim 2 is characterized in that: The motor (201) in the stirring assembly (2) is arranged above the tank cover (103), and the motor (201) is detachably mounted on the outer wall at the center of the tank cover (103) via a frame, and the shaft end of the motor (201) is synchronously rotatably connected with a rotating rod (202) arranged in the reaction tank (1) via a coupling.

4. The environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant according to claim 3 is characterized in that: The rotating rod (202) is arranged on the central axis of the reaction tank (1), and a mounting groove (202a) is provided on the outer wall of the rotating rod (202), and there are four mounting grooves (202a) in total. The four mounting grooves (202a) are arranged on the outer wall of the rotating rod (202) in a ring array structure, and the mounting grooves (202a) and the stirring plates (203) are arranged one by one.

5. The environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant according to claim 1 is characterized in that: The two axial ends of the sludge lifting pump (4) are respectively provided with a pump feed pipe (401) and a pump discharge pipe (402); the sludge lifting pump (4) is connected to the discharge pipe (3) via the pump feed pipe (401), and the sludge lifting pump (4) is connected to the distribution pipe (501a) on the distributor (501b) via the pump discharge pipe (402).

6. The environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant according to claim 5 is characterized in that: The top cover of the treatment tank (5) is provided with a cover plate (501), a distribution pipe (501a) is embedded in the center of the cover plate (501), and a distributor (501b) is arranged on the bottom side wall of the cover plate (501).

7. The environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant according to claim 1 is characterized in that: An output pipe (502) is threadedly connected to the side wall of the bottom of the treatment tank (5), a cleaning groove (503a-1) is provided on the inner wall of the top of the conical bucket (503a), and the conical bucket (503a) is connected to the cleaning water pipe (503b) through the cleaning groove (503a-1).

8. The environmentally friendly desulfurization wastewater treatment device for a coal-fired power plant according to claim 1 is characterized in that: A discharge pipe (503c-1) is welded to the bottom of the microporous stainless steel sintered filter bucket (503c), and the discharge pipe (503c-1) passes through the bottom side wall of the reaction tank (1) and extends out. The top of the vacuum buffer tank (6) is threadedly connected with a pressure relief pipe (601) and a pressure pipe (602), and the vacuum buffer tank (6) is connected to the processing tank (5) through the pressure pipe (602).

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