Novel seed crystal gelling and activating device for treating coal-containing wastewater of power plant

Abstract

The utility model discloses a novel seed crystal gelling and activating device for treating coal-containing wastewater of a power plant. The novel seed crystal gelling and activating device comprises a coal-containing wastewater drainage pipe, a pretreatment unit, a water inlet pipeline, a gelling and activating chamber, a water outlet pipeline and a recycling water tank, the coal-containing wastewater drainage pipe is communicated with an inlet of the pretreatment unit, and coal-containing wastewater is conveyed to the pretreatment unit for preliminary precipitation; an incongruous oblique flow sedimentation tank, a third-stage reaction tank, a second-stage reaction tank, a first-stage reaction tank and an equipment chamber are sequentially arranged in the gelling activation chamber from left to right in parallel in an attaching manner, and an outlet of the pretreatment unit is communicated with the first-stage reaction tank through a water inlet pipe; the wastewater subjected to primary sedimentation is sequentially sent to the first-stage reaction tank, the second-stage reaction tank, the third-stage reaction tank and the different-direction oblique-flow sedimentation tank to be stirred and mixed, the recycling water tank is communicated with the different-direction oblique-flow sedimentation tank through a water outlet pipeline, and supernate subjected to reaction sedimentation is sent to the recycling water tank. The device is simple in structure and small in occupied area.

Description

Technical Field

[0001] The utility model relates to the technical field of coal-containing wastewater treatment, and particularly relates to a novel seed gelling activation device for treating coal-containing wastewater in a power plant. Background Art

[0002] The coal-containing wastewater in a power plant mainly includes productive wastewater generated from the flushing, dust removal, and coal yard spraying in the coal conveying system, and the initial rainwater in the open coal yard. The coal-containing wastewater should be collected and treated separately, and other productive industrial wastewater or waste liquid should not enter. The coal-containing wastewater contains large coal powder particles, a large amount of suspended solids, and a very high chromaticity, and cannot be directly discharged. After treatment, the treated coal-containing wastewater should be recycled after reaching the standard.

[0003] At present, the treatment technologies for coal-containing wastewater in power plants are mainly the traditional chemical coagulation process and the electrochemical process.

[0004] Among them, the traditional chemical coagulation process is to add a coagulant and a coagulant aid to the wastewater, and through stirring and mixing, the agent reacts with the suspended solids in the wastewater to form larger flocs, and then the target wastewater is clarified by combining with the subsequent sedimentation and filtration device; however, this process has the following disadvantages: 1) In the traditional chemical addition process, no written experience can be formed and data recording is lacking, resulting in the lack of standardization and systematization in the chemical addition process, and the inability to monitor the chemical addition process in real time and conduct data analysis; due to the lack of data recording, it is often difficult to scientifically evaluate and improve the chemical addition process; 2) Since the traditional chemical addition method has a low degree of automation, the floor area of the treatment device is large, and it cannot adapt to the changes in the water quality and water volume of the wastewater in real time, so a large amount of manpower and material resources need to be invested in system debugging and frequent maintenance during actual operation, and the comprehensive operation cost is relatively high.

[0005] The electrochemical process is to pass an electric current into an electrochemical system on the premise of its own configuration control system. The particles in this system start to move to the appropriate electrodes to work. When the particles are connected to each other, they leave their charges on the electrodes, prompting the suspended particles in the water to link together. However, this process has the following disadvantages: 1) During operation, the consumption of soluble anode materials is extremely large, and the electrodes need to be replaced regularly; a dense oxide film and metal hydroxide precipitation are likely to form on the electrode surface, resulting in electrode passivation. The above two points reduce the electrochemical treatment efficiency, increase the operating cost, and affect the continuity and stability of the treatment process; 2) The electrochemical technology consumes a large amount of electrical energy. Especially when treating large-scale polluted water bodies, the high energy consumption not only increases the operating cost but also may put pressure on the energy supply; 3) The electrochemical technology has high requirements for the conductivity of water bodies and may not be effective for certain specific types of pollutants, and needs to be used in combination with other treatment technologies; 4) The electrochemical technology requires professional operation and maintenance personnel to ensure the normal operation of the equipment and the stability of the treatment effect. If the operation is improper or the equipment is not well maintained, it may affect the treatment effect and even cause equipment damage. In summary, although the electrochemical process has certain advantages, it has multiple disadvantages in practical applications, and these disadvantages limit its use in certain application scenarios.

[0006] Therefore, how to solve the problems of low automation level, large floor area, poor stability of treatment results, energy waste, lack of pertinence, complex operation management, high operation cost, complex structure, etc. of the coal-containing wastewater treatment equipment in power plants has become a difficult problem that urgently needs to be solved at present. Summary of the Invention

[0007] The technical problem to be solved by the present utility model is to provide a novel seed gelation activation device for treating coal-containing wastewater in power plants, which replaces the traditional chemical addition flocculation and electrochemical processes, has a simple structure and a small floor area, and saves land resources.

[0008] To solve the above technical problems, the present utility model adopts the following technical solutions: A novel seed coagulation activation device for treating coal-containing wastewater in a power plant of the present utility model is characterized in that it includes a coal-containing wastewater drain pipe, a pretreatment unit, an inlet pipe, a coagulation activation chamber, an outlet pipe and a reused water tank; the coal-containing wastewater drain pipe is communicated with the inlet of the pretreatment unit and sends the coal-containing wastewater to the pretreatment unit for preliminary precipitation; several vertically and longitudinally arranged partition plates are sequentially arranged at intervals from left to right inside the coagulation activation chamber, and the coagulation activation chamber is sequentially divided into an opposite cross-flow sedimentation tank, a tertiary reaction tank, a secondary reaction tank, a primary reaction tank and an equipment room from left to right by the partition plates; the outlet of the pretreatment unit is communicated with the primary reaction tank through an inlet pipe, and the preliminarily precipitated wastewater is sequentially sent to the primary reaction tank, the secondary reaction tank, the tertiary reaction tank and the opposite cross-flow sedimentation tank for stirring and mixing, and the reused water tank is communicated with the opposite cross-flow sedimentation tank through an outlet pipe and sends the supernatant after reaction and precipitation to the reused water tank.

[0009] Preferably, the pretreatment unit includes a coal sludge sedimentation tank, a coal-water sedimentation tank, a partition wall, a hoist and a square cast iron gate; the coal sludge sedimentation tank and the coal-water sedimentation tank are arranged side by side and aligned left and right, and are separated by a partition wall between them to ensure that they are not communicated with each other; the coal-containing wastewater drain pipe is communicated with the inside of the coal sludge sedimentation tank at a position above the left side surface of the coal sludge sedimentation tank and sends the coal-containing wastewater to the coal sludge sedimentation tank for precipitation; an overflow port I is vertically embedded and penetrated at a position above the left side surface of the partition wall, and a square cast iron gate matching the overflow port I is vertically and longitudinally arranged at a position on the left side surface of the partition wall corresponding to the overflow port I. The square cast iron gate is attached to the left side surface of the partition wall, and a hoist is also arranged on the upper surface of the partition wall. The driving end of the hoist is connected to the square cast iron gate and drives the square cast iron gate to move vertically up and down along the partition wall, thereby controlling the on-off of the overflow port I and flowing the supernatant after precipitation in the coal sludge sedimentation tank to the coal-water sedimentation tank through the overflow port I for secondary precipitation; one end of the inlet pipe is divided into two paths and extends into the coal-water sedimentation tank from above the coal-water sedimentation tank respectively, and a lift pump is also arranged on each of them, and the preliminarily precipitated wastewater in the coal-water sedimentation tank is sent to the primary reaction tank through the lift pump.

[0010] Preferably, it further includes a liquid level gauge; a liquid level gauge is also arranged in the coal sludge sedimentation tank, and the liquid level gauge is electrically connected to the hoist, and the liquid level in the coal sludge sedimentation tank is controlled through the cooperation of the liquid level gauge and the hoist.

[0011] Preferably, it further includes a variable-frequency stirring system I, a flowmeter I, and a flocculant dosing system; on the front surface of the gelling and activating chamber, a water inlet is recessed and opened at a position near the bottom relative to the primary reaction tank, and the other end of the water inlet pipe is communicated with the inside of the primary reaction tank through the water inlet, so as to send the preliminarily precipitated wastewater into the primary reaction tank; on the side of the water inlet pipe near the primary reaction tank, a flowmeter I is also provided, and the flowmeter I is electrically connected to the flocculant dosing system, and the change of the water volume is monitored through the flowmeter I, so as to control the dosing amount of the flocculant; in the equipment room, a flocculant dosing system is also provided, and the dosing end of the flocculant dosing system is communicated with the primary reaction tank, and a flocculant is added into the primary reaction tank; on the upper surface of the gelling and activating chamber, a variable-frequency stirring system I is vertically provided at a position relative to the primary reaction tank, and the stirring end of the variable-frequency stirring system I extends vertically downward into the inside of the primary reaction tank, so as to stir and mix the wastewater and the flocculant in the primary reaction tank once, and form flocs.

[0012] Preferably, it further includes a variable-frequency stirring system II and a seed separation system; the water body after the first stirring and mixing flows into the secondary reaction tank by self-flow through the upper outlet of the primary reaction tank, and on the upper surface of the gelling and activating chamber, a seed separation system is provided at a position relative to the secondary reaction tank, and the seeds are recovered and separated through the seed separation system, and high-density micro-particle seeds are added into the secondary reaction tank; on the upper surface of the gelling and activating chamber, a variable-frequency stirring system II is vertically provided at a position relative to the secondary reaction tank, and the seed separation system and the variable-frequency stirring system II are arranged at a left-right interval, and the stirring end of the variable-frequency stirring system II extends vertically downward into the inside of the secondary reaction tank, so as to stir and mix the water body and the seeds in the secondary reaction tank a second time, and make the seeds collide and adhere to the flocs.

[0013] Preferably, it further includes a variable-frequency stirring system III and a coagulant aid dosing system; the water body after the second stirring and mixing flows into the tertiary reaction tank by self-flow through the upper outlet of the secondary reaction tank, and in the equipment room, a coagulant aid dosing system is also provided, and the dosing end of the coagulant aid dosing system is communicated with the tertiary reaction tank, and a coagulant aid is added into the tertiary reaction tank; on the upper surface of the gelling and activating chamber, a variable-frequency stirring system III is vertically provided at a position relative to the tertiary reaction tank, and the variable-frequency stirring system III and the seed separation system are arranged at a left-right interval, and the stirring end of the variable-frequency stirring system III extends vertically downward into the inside of the tertiary reaction tank, so as to stir and mix the water body and the coagulant aid in the tertiary reaction tank a third time, and react to form a composite floc with a density of 1.5~2.2 g / cm 3 ³.

[0014] Preferably, it further includes a heavy-duty sludge scraping system, a sludge discharge pipeline, and a flushing pipe. The water body after three times of stirring and mixing flows into the cross-flow inclined sedimentation tank by gravity through the upper outlet of the three-stage reaction tank. The cross-flow inclined sedimentation tank is inclined with inclined tubes or inclined plates, and sedimentation is carried out in the cross-flow inclined sedimentation tank. An outlet is also embedded and opened on the front surface of the gelling activation chamber at a position close to the top relative to the cross-flow inclined sedimentation tank. One end of the outlet pipeline is communicated with the inside of the cross-flow inclined sedimentation tank through the outlet, and then the supernatant in the cross-flow inclined sedimentation tank is sent to the reused water tank. A heavy-duty sludge scraping system is vertically arranged on the upper surface of the gelling activation chamber at a position relative to the cross-flow inclined sedimentation tank. The sludge scraping end of the heavy-duty sludge scraping system extends vertically downward into the inside of the cross-flow inclined sedimentation tank, and a scraper is arranged in a V shape at its sludge scraping end. The angle of the scraper is 8-10°. The cross-flow inclined sedimentation tank is scraped by the heavy-duty sludge scraping system, and the sludge flows into the coal slime sedimentation tank by gravity through the sludge discharge pipeline. A flushing pipe is also arranged on the upper surface of the gelling activation chamber at a position relative to the cross-flow inclined sedimentation tank. The flushing pipe and the heavy-duty sludge scraping system are arranged without interference, and the cross-flow inclined sedimentation tank is flushed regularly through the flushing pipe.

[0015] Preferably, it further includes a turbidimeter, a reused water pump, a flowmeter II, and a flushing water main pipe. A turbidimeter is also arranged on the outlet pipeline on the side close to the reused water tank. The turbidimeter is electrically connected to the flowmeter I, the flocculant dosing system, the coagulant aid dosing system, and the seed separation system respectively, and the water quality of the outlet water is monitored through the turbidimeter to adjust the dosing amounts of the flocculant, the coagulant aid, the seed, and the water inflow. One end of the flushing water main pipe is divided into two paths and extends into the reused water tank from above the reused water tank respectively, and a reused water pump is arranged on it respectively. Then, the reused water in the reused water tank is used for spraying in the coal yard area and flushing the coal conveying trestle through the flushing water main pipe by the reused water pump. A flowmeter II is also arranged on the flushing water main pipe on the side far from the reused water tank, and the water output of the reused water is monitored through the flowmeter II.

[0016] The beneficial effects of the present utility model are as follows:

[0017] (1) The present utility model replaces the traditional flocculation with chemical agents and the electrochemical process, has a simple structure, small floor area, and saves land resources.

[0018] (2) The present utility model can feed back results in real time, can timely discover problems and solve them, has a high degree of automation, low manual participation, and the data feedback results are accurate and detailed, thus reducing the operation cost and eliminating the need for excessive manual maintenance.

[0019] (3) The water quality treated by the present utility model has high stability and strong pertinence, and due to the high degree of automation, it has strong adaptability to fluctuations in water volume and water quality.

[0020] (4)The seed crystal of the present utility model can be reused, saving energy, largely avoiding secondary pollution, and reducing the operation cost. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of a novel seed crystal gelling activation device for treating coal-containing wastewater in a power plant according to the present utility model.

[0023] Figure 2 For Figure 1 an enlarged schematic view of the gelling activation chamber part.

[0024] Among them, 1 - coal sludge sedimentation tank; 2 - hoist; 3 - square cast iron gate; 4 - liquid level gauge; 5 - coal-water sedimentation tank; 6 - lift pump; 7 - coal-containing wastewater drain pipe; 8 - flowmeter I; 9 - inlet pipe; 10 - gelling activation chamber; 11 - primary reaction tank; 12 - variable frequency stirring system I; 13 - flocculant dosing system; 14 - coagulant aid dosing system; 15 - secondary reaction tank; 16 - variable frequency stirring system II; 17 - tertiary reaction tank; 18 - variable frequency stirring system III; 19 - countercurrent inclined flow sedimentation tank; 20 - heavy-duty sludge scraping system; 21 - flushing pipe; 22 - seed crystal separation system; 23 - sludge discharge pipe; 24 - outlet pipe; 25 - recycled water tank; 26 - recycled water pump; 27 - flowmeter II; 28 - turbidimeter; 29 - flushing water main pipe. Specific Embodiments

[0025] The technical solutions of the present utility model will be clearly and completely described below through specific embodiments.

[0026] A novel seed crystal gelling activation device for treating coal-containing wastewater in a power plant according to the present utility model includes a coal-containing wastewater drain pipe 7, a pretreatment unit, an inlet pipe 9, a gelling activation chamber 10, an outlet pipe 24, and a recycled water tank 25; the coal-containing wastewater drain pipe 7 is communicated with the inlet of the pretreatment unit and sends the coal-containing wastewater to the pretreatment unit for preliminary precipitation; among them, the pretreatment unit includes a coal sludge sedimentation tank 1, a coal-water sedimentation tank 5, a partition wall, a hoist 2, and a square cast iron gate 3; the specific structure is as Figure 1 , Figure 2As shown in the figure, the slime sedimentation tank 1 and the coal-water sedimentation tank 5 are arranged side by side and aligned left and right. The two are separated by a partition wall to ensure that there is no connection between the slime sedimentation tank 1 and the coal-water sedimentation tank 5. The coal-containing wastewater drain pipe 7 is connected to the inside of the slime sedimentation tank 1 through the upper position on the left side of the slime sedimentation tank 1, and the coal-containing wastewater is sent to the slime sedimentation tank 1 for sedimentation. An overflow port I is vertically embedded and penetrated through the upper position on the left side of the partition wall. A square cast iron gate 3 that matches the overflow port I is vertically and longitudinally arranged at the position on the left side of the partition wall corresponding to the overflow port I. The square cast iron gate 3 is arranged in contact with the left side of the partition wall, and a hoist 2 is also arranged on the upper surface of the partition wall. The driving end of the hoist 2 is connected to the square cast iron gate 3 and drives the square cast iron gate 3 to move vertically up and down along the partition wall, thereby controlling the on-off of the overflow port I and flowing the supernatant after sedimentation in the slime sedimentation tank 1 to the coal-water sedimentation tank 5 through the overflow port I for secondary sedimentation.

[0027] One end of the water inlet pipe 9 of the present utility model is divided into two paths and extends into the coal-water sedimentation tank 5 from above the coal-water sedimentation tank 5 respectively, and a lift pump 6 is respectively arranged thereon. Then, the wastewater preliminarily sedimented in the coal-water sedimentation tank 5 is sent to the primary reaction tank 11 through the lift pump 6. As Figure 1 、 Figure 2 shown, a liquid level gauge 4 is also arranged in the slime sedimentation tank 1, and the liquid level gauge 4 is electrically connected to the hoist 2. Then, through the cooperation of the liquid level gauge 4 and the hoist 2, the liquid level in the slime sedimentation tank 1 is controlled. By preliminarily sedimenting the coal-containing wastewater, the present utility model can reduce the treatment load of the subsequent treatment process, adjust the water quality and water volume, and play a role in protecting the water pump, pipeline and instrument. In addition, by arranging two lift pumps 6 in parallel in the present application, when one of them needs to be repaired and replaced, the other lift pump 6 can be switched for use, thereby avoiding shutdown for maintenance and improving work efficiency.

[0028] Inside the gelling activation chamber 10 of the present utility model, several vertically and longitudinally arranged partition plates are successively arranged at intervals from left to right. The gelling activation chamber 10 is successively divided into an anisotropic inclined flow sedimentation tank 19, a tertiary reaction tank 17, a secondary reaction tank 15, a primary reaction tank 11 and an equipment room from left to right by the partition plates. As Figure 1 、 Figure 2 shown, the outlet of the pretreatment unit is connected to the primary reaction tank 11 through a water inlet pipe, and the wastewater after preliminary sedimentation is successively sent to the primary reaction tank 11, the secondary reaction tank 15, the tertiary reaction tank 17 and the anisotropic inclined flow sedimentation tank 19 for stirring and mixing. The reuse water tank 25 is connected to the anisotropic inclined flow sedimentation tank 19 through an outlet pipe 24, and the supernatant after reaction and sedimentation is sent to the reuse water tank 25. The present utility model greatly shortens the sedimentation time of the flocculent and significantly improves the sedimentation efficiency.

[0029] As Figure 1 、 Figure 2As shown in the figure, on the front surface of the gelling activation chamber 10, at a position relative to the first-stage reaction tank 11 near the bottom, a water inlet is also embedded and opened. The other end of the water inlet pipe 9 is communicated with the inside of the first-stage reaction tank 11 through the water inlet, and then the preliminarily precipitated wastewater is sent into the first-stage reaction tank 11; on the side of the water inlet pipe 9 near the first-stage reaction tank 11, a flowmeter I 8 is also provided, and the flowmeter I 8 is electrically connected to the flocculant dosing system 13, and the change of the water volume is monitored through the flowmeter I 8, and then the dosing amount of the flocculant is controlled; in the equipment room, a flocculant dosing system 13 is also provided, and the dosing end of the flocculant dosing system 13 is communicated with the first-stage reaction tank 11, and a flocculant is added into the first-stage reaction tank 11; on the upper surface of the gelling activation chamber 10, at a position relative to the first-stage reaction tank 11, a variable-frequency stirring system I 12 is vertically provided, and the stirring end of the variable-frequency stirring system I 12 extends vertically downward into the inside of the first-stage reaction tank 11, and then the wastewater and the flocculant in the first-stage reaction tank 11 are stirred and mixed for the first time to form flocs.

[0030] As Figure 1 , Figure 2 shown, the water body after the first stirring and mixing flows into the second-stage reaction tank 15 by gravity through the upper outlet of the first-stage reaction tank 11. On the upper surface of the gelling activation chamber 10, at a position relative to the second-stage reaction tank 15, a seed separation system 22 is also provided, and the seeds are recovered and separated through the seed separation system 22, and high-density micro-particle seeds are added into the second-stage reaction tank 15; on the upper surface of the gelling activation chamber 10, at a position relative to the second-stage reaction tank 15, a variable-frequency stirring system II 16 is vertically provided, and the seed separation system 22 and the variable-frequency stirring system II 16 are arranged at intervals left and right. The stirring end of the variable-frequency stirring system II 16 extends vertically downward into the inside of the second-stage reaction tank 15, and then the water body in the second-stage reaction tank 15 and the seeds are stirred and mixed for the second time, and the seeds collide and adhere to the flocs.

[0031] As Figure 1 , Figure 2 shown, the water body after the second stirring and mixing flows into the third-stage reaction tank 17 by gravity through the upper outlet of the second-stage reaction tank 15. In the equipment room, a coagulant aid dosing system 14 is also provided. The dosing end of the coagulant aid dosing system 14 is communicated with the third-stage reaction tank 17, and a coagulant aid is added into the third-stage reaction tank 17; on the upper surface of the gelling activation chamber 10, at a position relative to the third-stage reaction tank 17, a variable-frequency stirring system III 18 is vertically provided, and the variable-frequency stirring system III 18 and the seed separation system 22 are arranged at intervals left and right. The stirring end of the variable-frequency stirring system III 18 extends vertically downward into the inside of the third-stage reaction tank 17, and then the water body and the coagulant aid in the third-stage reaction tank 17 are stirred and mixed for the third time, and a composite floc with a density of 1.5 - 2.2 g / cm 3 is formed.

[0032] As Figure 1 ,Figure 2 As shown, the water body after three - time stirring and mixing flows by gravity into the inclined - flow sedimentation tank 19 through the upper outlet of the three - stage reaction tank 17. And inclined tubes or inclined plates are arranged obliquely in the inclined - flow sedimentation tank 19, and thus sedimentation is carried out in the inclined - flow sedimentation tank 19. An outlet is also embedded and opened at the front surface of the gelling and activation chamber 10 at a position relative to the top of the inclined - flow sedimentation tank 19. One end of the outlet pipe 24 is communicated with the inside of the inclined - flow sedimentation tank 19 through the outlet, and thus the supernatant in the inclined - flow sedimentation tank 19 is sent to the recycled water tank 25. A heavy - duty sludge scraping system 20 is also vertically arranged on the upper surface of the gelling and activation chamber 10 at a position relative to the inclined - flow sedimentation tank 19. The sludge scraping end of the heavy - duty sludge scraping system 20 extends vertically downward into the inside of the inclined - flow sedimentation tank 19, and a scraper is arranged in a V - shape at its sludge scraping end. The angle of the scraper is 8 - 10°, and the number of the scrapers and the power of the heavy - duty sludge scraping system 20 are enhanced compared with those of a conventional sludge scraper. Thus, the inclined - flow sedimentation tank 19 is subjected to sludge scraping operation by the heavy - duty sludge scraping system 20, and the sludge flows by gravity through the sludge discharge pipe 23 into the coal sludge sedimentation tank 1. A flushing pipe 21 is also arranged on the upper surface of the gelling and activation chamber 10 at a position relative to the inclined - flow sedimentation tank 19. And the flushing pipe 21 and the heavy - duty sludge scraping system 20 are arranged without interfering with each other, and the inclined - flow sedimentation tank 19 is flushed regularly through the flushing pipe 21. Thus, it can cope with high - density composite flocs, avoid stopping the pool to reduce water level, and improve the utilization efficiency of the sedimentation tank. In the three - stage reaction tank 17 of the present utility model, a coagulant aid is added. Through the bridging effect and with better hydraulic stirring conditions, the collision and growth of flocs are completed, and the size and structural strength of the flocs are further increased.

[0033] On the side of the outlet pipe 24 close to the recycled water tank 25 of the present utility model, a turbidimeter 28 is also provided, as Figure 1 、 Figure 2 shown. The turbidimeter 28 is electrically connected to the flowmeter I 8, the flocculant dosing system 13, the coagulant aid dosing system 14, and the seed separation system 22 respectively. And the effluent water quality is monitored through the turbidimeter 28 to adjust the dosing amounts of the flocculant, the coagulant aid, the seeds and the water inflow, so as to ensure that the effluent water quality meets the project requirements. One end of the flushing water main pipe 29 is divided into two paths and extends into the recycled water tank 25 from above the recycled water tank 25 respectively, and a recycled water pump 26 is also provided on it respectively. Thus, the recycled water in the recycled water tank 25 is used for spraying in the coal yard area and flushing the coal conveying trestle through the flushing water main pipe 29 by the recycled water pump 26. A flowmeter II 27 is also provided on the side of the flushing water main pipe 29 far from the recycled water tank 25, and the water output of the recycled water is monitored through the flowmeter II 27.

[0034] The whole set of seed gelling and activation device of the utility model is equipped with an electric PLC automatic control system and an Internet of Things operating system, which can provide real-time feedback on the operating conditions of the internal equipment and instruments of the system. The whole set of seed gelling and activation device realizes automatic control, no one on duty, regular inspections, and except for the replenishment of reagents, the main process does not require manual operation and management. All equipment and valves can be realized automatically through the self-contained control cabinet, and all operating states and alarm signals are reserved for the centralized monitoring interface of the coal conveying program control system. This is a prior art, so it will not be repeated here.

[0035] The working principle of the utility model is as follows: the wastewater after preliminary precipitation in the pretreatment unit is sent to the primary reaction tank 11 through the water inlet pipe 9, and is quickly mixed with the flocculant to form flocs under the drive of the variable frequency stirring system I 12; then it flows to the secondary reaction tank 15 through the upper outlet of the primary reaction tank 11, and collides and adheres to the seed crystal under the drive of the variable frequency stirring system II 16; then it flows to the tertiary reaction tank 17 through the upper outlet of the secondary reaction tank 15, and is stirred and reacted with the coagulant aid to form a flocculent with a density of 1.5-2.2 g / cm 3 and then flows through the upper outlet of the tertiary reaction tank 17 to the heterotropic diagonal flow sedimentation tank 19 for precipitation, and the supernatant after precipitation is sent to the reuse water pool 25.

[0036] Beneficial effects of the utility model:

[0037] (1) The utility model replaces the traditional chemical flocculation and electrochemical process, has a simple structure, occupies a small area, and saves land resources;

[0038] (2) The utility model can provide real-time feedback and timely discover and solve problems. It has a high degree of automation and low manual involvement. The data feedback results are accurate and detailed, thereby reducing operating costs and eliminating the need for excessive manual maintenance.

[0039] (3) The utility model has high stability and pertinence in treating water quality, and due to its high degree of automation, it has strong ability to cope with fluctuations in water quantity and quality;

[0040] (4) The crystal seeds of the utility model can be reused, which saves energy, avoids secondary pollution to a large extent, and reduces operating costs.

[0041] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the technical requirements.

Claims

1. A novel seed gelling activation device for treating coal-containing wastewater in a power plant, characterized in that: It includes a coal-containing wastewater drain pipe, a pretreatment unit, a water inlet pipe, a gelling activation chamber, a water outlet pipe and a recycled water tank; the coal-containing wastewater drain pipe is communicated with the inlet of the pretreatment unit and sends the coal-containing wastewater to the pretreatment unit for preliminary precipitation; several vertically longitudinally arranged partition plates are sequentially arranged at intervals from left to right inside the gelling activation chamber, and the gelling activation chamber is sequentially divided into an anisotropic inclined flow sedimentation tank, a tertiary reaction tank, a secondary reaction tank, a primary reaction tank and an equipment room from left to right through the partition plates; the outlet of the pretreatment unit is communicated with the primary reaction tank through a water inlet pipe, and the preliminarily precipitated wastewater is sequentially sent to the primary reaction tank, the secondary reaction tank, the tertiary reaction tank and the anisotropic inclined flow sedimentation tank for stirring and mixing, and the recycled water tank is communicated with the anisotropic inclined flow sedimentation tank through a water outlet pipe and sends the supernatant after reaction and precipitation to the recycled water tank.

2. The seed cementation activation device for a novel treatment of coal-containing wastewater in a power plant according to claim 1, characterized in that: The pretreatment unit includes a slime sedimentation tank, a coal-water sedimentation tank, a partition wall, a hoist and a square cast iron gate; the slime sedimentation tank and the coal-water sedimentation tank are arranged side by side and aligned left and right, and are separated by a partition wall between them to ensure that there is no communication between the slime sedimentation tank and the coal-water sedimentation tank; the coal-containing wastewater drain pipe is communicated with the inside of the slime sedimentation tank at a position above the left side of the slime sedimentation tank and sends the coal-containing wastewater to the slime sedimentation tank for precipitation; an overflow port Ⅰ is vertically and penetratingly opened at a position above the left side of the partition wall, and a square cast iron gate matching the overflow port Ⅰ is vertically longitudinally arranged at a position on the left side of the partition wall corresponding to the overflow port Ⅰ. The square cast iron gate is attached to the left side of the partition wall, and a hoist is also arranged on the upper surface of the partition wall. The driving end of the hoist is connected to the square cast iron gate and drives the square cast iron gate to move vertically up and down along the partition wall, thereby controlling the on-off of the overflow port Ⅰ and flowing the supernatant after precipitation in the slime sedimentation tank through the overflow port Ⅰ to the coal-water sedimentation tank for secondary precipitation; one end of the water inlet pipe is divided into two paths and extends into the coal-water sedimentation tank from above the coal-water sedimentation tank respectively, and a lift pump is also arranged on each of them, and then the wastewater preliminarily precipitated in the coal-water sedimentation tank is sent to the primary reaction tank through the lift pump.

3. A seed gelling activation device for a novel treatment of coal-containing wastewater in a power plant according to claim 2, characterized in that: It also includes a liquid level gauge; a liquid level gauge is also arranged in the slime sedimentation tank, and the liquid level gauge is electrically connected to the hoist, and then the liquid level in the slime sedimentation tank is controlled through the cooperation of the liquid level gauge and the hoist.

4. A seed cementation activation device for a novel treatment of coal-containing wastewater in a power plant according to claim 2, characterized in that: It also includes a variable-frequency stirring system I, a flowmeter I, and a flocculant dosing system; a water inlet is also embedded and opened at a position on the front surface of the gelling and activating chamber relative to the bottom of the first reaction tank, and the other end of the water inlet pipe is communicated with the inside of the first reaction tank through the water inlet, so as to send the preliminarily precipitated wastewater into the first reaction tank; a flowmeter I is also provided on the side of the water inlet pipe close to the first reaction tank, and the flowmeter I is electrically connected to the flocculant dosing system, and the change of the water volume is monitored through the flowmeter I, so as to control the dosing amount of the flocculant; a flocculant dosing system is also provided in the equipment room, and the dosing end of the flocculant dosing system is communicated with the first reaction tank, and a flocculant is added into the first reaction tank; a variable-frequency stirring system I is also vertically provided on the upper surface of the gelling and activating chamber relative to the first reaction tank, and the stirring end of the variable-frequency stirring system I vertically extends downward into the inside of the first reaction tank, so as to stir and mix the wastewater and the flocculant in the first reaction tank once, and form flocs.

5. A seed cementation activation device for a novel treatment of coal-containing wastewater in a power plant according to claim 4, characterized in that: It also includes a variable-frequency stirring system II and a seed separation system; the water body after the first stirring and mixing flows into the second reaction tank by self-flow through the upper outlet of the first reaction tank, and a seed separation system is also provided on the upper surface of the gelling and activating chamber relative to the second reaction tank, and the seeds are recovered and separated through the seed separation system, and high-density micro-particle seeds are added into the second reaction tank; a variable-frequency stirring system II is also vertically provided on the upper surface of the gelling and activating chamber relative to the second reaction tank, and the seed separation system and the variable-frequency stirring system II are arranged at a left-right interval, and the stirring end of the variable-frequency stirring system II vertically extends downward into the inside of the second reaction tank, so as to stir and mix the water body and the seeds in the second reaction tank a second time, and make the seeds collide and adhere to the flocs.

6. A seed gelling activation device for a novel treatment of coal-containing wastewater in a power plant according to claim 5, characterized in that: It also includes a variable-frequency stirring system III and a coagulant aid dosing system; the water body after secondary stirring and mixing flows into the third reaction tank by gravity through the upper outlet of the secondary reaction tank, and a coagulant aid dosing system is also provided in the equipment room. The dosing end of the coagulant aid dosing system is communicated with the third reaction tank, and a coagulant aid is added into the third reaction tank; a variable-frequency stirring system III is vertically provided on the upper surface of the gelling activation chamber relative to the position of the third reaction tank, and the variable-frequency stirring system III and the seed separation system are arranged at a left-right interval. The stirring end of the variable-frequency stirring system III extends vertically downward into the interior of the third reaction tank, so as to perform three-time stirring and mixing on the water body and the coagulant aid in the third reaction tank, and react to form a composite coagulant floc with a density of 1.5~2.2 g / cm 3 ³.

7. A seed gelling activation device for a new type of treatment of coal-containing wastewater in a power plant according to claim 6, characterized in that: It also includes a heavy-duty sludge scraping system, a sludge discharge pipe, and a flushing pipe; the water body after the third stirring and mixing flows into the countercurrent inclined sedimentation tank by self-flow through the upper outlet of the third reaction tank, and inclined tubes or inclined plates are inclined in the countercurrent inclined sedimentation tank, so as to perform sedimentation in the countercurrent inclined sedimentation tank; a water outlet is also embedded and opened at a position on the front surface of the gelling and activating chamber relative to the top of the countercurrent inclined sedimentation tank, and one end of the water outlet pipe is communicated with the inside of the countercurrent inclined sedimentation tank through the water outlet, so as to send the supernatant in the countercurrent inclined sedimentation tank into the reused water tank; a heavy-duty sludge scraping system is also vertically provided on the upper surface of the gelling and activating chamber relative to the countercurrent inclined sedimentation tank, the sludge scraping end of the heavy-duty sludge scraping system vertically extends downward into the inside of the countercurrent inclined sedimentation tank, and a scraper is arranged in a V shape at the sludge scraping end, the angle of the scraper is 8-10°, and the countercurrent inclined sedimentation tank is scraped by the heavy-duty sludge scraping system, and the sludge flows into the coal sludge sedimentation tank by self-flow through the sludge discharge pipe; a flushing pipe is also provided on the upper surface of the gelling and activating chamber relative to the countercurrent inclined sedimentation tank, and the flushing pipe and the heavy-duty sludge scraping system are arranged without interference, and the countercurrent inclined sedimentation tank is flushed regularly through the flushing pipe.

8. A seed gelling activation device for a novel treatment of coal-containing wastewater in a power plant according to claim 7, characterized in that: It also includes a turbidimeter, a recycled water pump, a flowmeter II, and a flushing water main pipe; a turbidimeter is also provided on the outlet pipe on the side close to the recycled water tank, and the turbidimeter is electrically connected to the flowmeter I, the flocculant dosing system, the coagulant aid dosing system, and the seed separation system respectively, and monitors the quality of the outlet water through the turbidimeter to adjust the dosing amounts of the flocculant, the coagulant aid, and the seed, as well as the water inflow; one end of the flushing water main pipe is branched into two paths and extends into the recycled water tank from above the recycled water tank respectively, and recycled water pumps are also provided thereon respectively, and then the recycled water in the recycled water tank is used for spraying in the coal yard area and flushing the coal conveying trestle through the flushing water main pipe by the recycled water pumps; a flowmeter II is also provided on the flushing water main pipe on the side far from the recycled water tank, and the water output of the recycled water is monitored through the flowmeter II.

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