CN205821056U - A kind of thermal power plant industrial wastewater treatment system - Google Patents

Abstract

The utility model discloses an industrial waste water treatment system for a thermal power plant, which is characterized in that it comprises a waste water storage pool connected in sequence, a waste water delivery pump, a pH adjustment tank, a reaction tank, a solid contact clarification tank, a high-efficiency quicksand filter, a neutralization The bottom of the solid contact clarifier is connected with the sludge treatment system. The advanced solid contact clarifier and high-efficiency quicksand filter are used to double remove suspended matter, so that the suspended matter in the treated wastewater is as low as 10ppm and can be reused. At the same time, the high-efficiency quicksand filter used in this system is a uniquely designed high Technology and environmental protection products, it adopts the principle of upflow fluidized bed filtration and a single homogeneous filter material, filtration and sand washing are carried out at the same time, without shutting down for flushing or backwashing, and the ingenious sand lifting and sand washing structure replaces the traditional high-power backwashing system , not only greatly reduces energy consumption, but also greatly reduces the auxiliary valves and piping systems of the system, making operation, operation and maintenance easier.

Description

A thermal power plant industrial wastewater treatment system

technical field

The utility model relates to an industrial wastewater treatment system, in particular to an industrial wastewater treatment system for thermal power plants.

Background technique

The traditional process for removing suspended solids from industrial wastewater in thermal power plants mainly adopts single-stage treatment of inclined plate clarifiers or dual treatment of inclined plate clarifiers and gravity filter tanks. However, the structure of inclined plate clarifiers is complex and the treatment effect is limited. Traditional gravity filters require Regular backwashing pumps and fans are used for cleaning, which consumes a lot of energy. Therefore, the traditional industrial wastewater treatment system can no longer meet the current environmental protection requirements of energy saving and emission reduction.

Utility model content

The purpose of the utility model is to provide an industrial wastewater treatment system for thermal power plants, which has low energy consumption, simple operation and maintenance, and good treatment effect.

In order to solve the problems of the technologies described above, the utility model adopts the following technical solutions:

A thermal power plant industrial wastewater treatment system is characterized in that it comprises sequentially connected wastewater storage tanks, wastewater delivery pumps, pH adjustment tanks, reaction tanks, solid contact clarifiers, high-efficiency quicksand filters, neutralization tanks and drainage tanks, The bottom of the solid contact clarifier is connected with a sludge treatment system.

In the aforementioned industrial wastewater treatment system for thermal power plants, the solid contact clarifier includes a tank body, a reaction well and a diversion cylinder, the reaction well is suspended in the tank body, one end of the diversion cylinder is located in the reaction well, and the other end is suspended in the The bottom of the tank body is equipped with a lifting impeller in the guide tube; the inlet pipe of the solid contact clarifier is connected to the guide tube, and the outlet pipe of the solid contact clarifier is connected to the upper part of the tank body; the sludge discharge pipe of the solid contact clarifier and the described The sludge treatment system is connected. The bottom of the pool body is provided with a mud scraper connected with the drive motor.

In the aforementioned industrial wastewater treatment system for thermal power plants, the high-efficiency quicksand filter includes a sealed housing, and the housing is connected with a waste water inlet pipe. One end of the waste water inlet pipe is located on the upper part of the outer wall of the housing, and the other end is located in the upper part of the housing. The lower part; there is also a waste water discharge pipe in the shell. One end of the waste water discharge pipe is located at the bottom of the shell, and the other end is located at the top of the outer wall of the shell. The sand lifting pipe lifts the dirty sand to the top sand washer, and the scrubbed sand falls back Continue to filter in the shell, and the scrubbing waste water is discharged out of the shell through the waste water discharge pipe; in order to ensure uniform water distribution and improve water quality, a water distributor is installed on the water inlet pipe of the high-efficiency quicksand filter, and its clean water outlet is located in the shell. The upper part of the body, through which water flows out through the overflow.

In the aforesaid industrial wastewater treatment system for thermal power plants, the housing is also provided with a sand guide cone, the sand guide cone is shaped like a trumpet, the sand guide cone is set on the waste water discharge pipe, and the diameter of the sand guide cone is The larger end faces the bottom of the housing.

The waste water inlet pipe includes an annular water distribution tank, the annular water distribution tank is located at the bottom of the waste water inlet pipe, and the annular water distribution tank is connected with the water distributor.

The waste water discharge pipe includes a sand lifting pipe, which is vertically arranged in the casing, and a sand washing device is arranged on the top of the sand lifting pipe, and the sand lifting pipes of the sand washing device are connected.

Compared with the prior art, in the thermal power plant industrial wastewater treatment system of the utility model, a solid contact clarifier and a high-efficiency quicksand filter are used to double remove suspended matter from industrial wastewater.

The utility model adopts the solid contact clarifier and has the following advantages: higher design hydraulic load makes the solid contact clarifier smaller than the traditional sedimentation and clarification equipment; the drug consumption is small, and it is not necessary to add polymer coagulant aids ;The unique reaction mechanism makes the solid contact clarifier have a wide range of influent water quality, and has a strong ability to withstand impact loads, and can produce better and more stable effluent water quality; integrated structural design and process The connection makes the operation easier, without complicated adjustment, control and manual operation intervention.

The utility model adopts the high-efficiency quicksand filter and has the following advantages: continuous self-cleaning filtration: the filter medium is automatically circulated, continuously cleaned, and does not need to be shut down for backwashing. The complete set of equipment has a simple structure, completely omitting the traditional backwashing device, no backwashing water pump, greatly reducing the system's auxiliary valve piping system, and greatly simplifying the operation and maintenance. The operator can directly observe the cleaning process of the quartz sand filter material, and adjust it according to the operating conditions to achieve the best filtering effect. There is no need to replace the quartz sand filter material regularly, and the filter material has a long service life. Strong impact load resistance, suitable for a wide range of water quality, not easy to block. The effect of coagulation reaction is obvious: the application of coagulation reaction mechanism and sedimentation mechanism can effectively remove suspended solids and colloidal substances in water, and the treatment effect continues to be good.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of the utility model;

Fig. 2 is the structural representation of a kind of embodiment of solid contact clarifier;

Fig. 3 is a structural schematic diagram of an embodiment of a high-efficiency quicksand filter.

Reference signs: 1-wastewater storage tank, 2-wastewater delivery pump, 3-PH adjustment tank, 4-reaction tank, 5-solid contact clarification tank, 6-high efficiency quicksand filter, 7-neutralization tank, 8-drainage Pool, 9-sludge treatment system, 10-inlet pipe, 11-scraping rake, 12-guiding tube, 13-reaction well, 14-pool body, 15-drain pipe, 16-outlet pipe, 17-guide Sand cone bucket, 18-wastewater discharge pipe, 19-wastewater inlet pipe, 20-clean water outlet, 21-shell, 22-water distributor, 23-sand washing device, 24-sand lifting pipe, 25-ring water distribution tank.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

detailed description

Embodiment 1 of the present utility model: as shown in Fig. 1, Fig. 2 and Fig. 3, a thermal power plant industrial waste water treatment system is characterized in that it comprises a waste water storage pool 1, a waste water delivery pump 2, and a pH adjustment system connected in sequence Tank 3, reaction tank 4, solid contact clarifier 5, high-efficiency quicksand filter 6, neutralization tank 7 and drainage tank 8, and the bottom of solid contact clarifier 5 is connected with a sludge treatment system 9.

The solid contact clarifier 5 includes a tank body 14, a reaction well 13 and a diversion tube, the reaction well 13 is suspended in the tank body 14, one end of the diversion tube is located in the reaction well 13, and the other end is suspended at the bottom of the tank body 14 , the guide cylinder is provided with a lifting impeller; the water inlet pipe 10 of the solid contact clarifier 5 communicates with the guide cylinder, and the outlet pipe 16 of the solid contact clarifier 5 communicates with the upper part of the pool body 14; the sludge discharge pipe 15 of the solid contact clarifier 5 It communicates with the sludge treatment system 9 . The bottom of the pool body 14 is provided with a scraper 11 connected with a drive motor.

High-efficiency quicksand filter 6 comprises sealed casing 21, is communicated with waste water inlet pipe 19 on the casing 21, and one end of waste water inlet pipe 19 is positioned at the top of casing 21 outer walls, and the other end is positioned at the bottom in casing 21; Also be provided with waste water discharge pipe 18 in, one end of waste water discharge pipe 18 is positioned at the bottom in housing 21, and the other end is positioned at the top of housing 21 outer walls; A water distributor 22 is also provided in the housing 21, and the water distributor 22 is connected to the waste water inlet pipe 19. The housing 21 is also provided with a sand-guiding cone 17, the sand-guiding cone 17 is trumpet-shaped, the sand-guiding cone 17 is sleeved on the waste water discharge pipe 18, and the larger end of the sand-guiding cone 17 faces the The bottom of the casing 21.

The waste water inlet pipe 19 includes an annular water distribution tank 25, which is located at the bottom of the waste water inlet pipe 19, and the annular water distribution tank 25 is connected to the water distributor 22. Wastewater discharge pipe 18 comprises sand lifting pipe 24, and sand lifting pipe 24 is vertically arranged in housing 21, and the top of sand lifting pipe 24 is provided with sand washing device 23, and the sand lifting pipe 24 of sand washing device 23 is connected.

Embodiment 2: as shown in Fig. 1, Fig. 2 and Fig. 3, a kind of industrial waste water treatment system for thermal power plant comprises successively connected waste water storage tank 1, waste water delivery pump 2, pH adjustment tank 3, reaction tank 4, solid The contact clarifier 5, the high-efficiency quicksand filter 6, the neutralization tank 7 and the drainage tank 8, and the bottom of the solid contact clarifier 5 is connected with a sludge treatment system 9.

The solid contact clarifier 5 includes a tank body 14, a reaction well 13 and a diversion tube, the reaction well 13 is suspended in the tank body 14, one end of the diversion tube is located in the reaction well 13, and the other end is suspended at the bottom of the tank body 14 , the guide cylinder is provided with a lifting impeller; the water inlet pipe 10 of the solid contact clarifier 5 communicates with the guide cylinder, and the outlet pipe 16 of the solid contact clarifier 5 communicates with the upper part of the pool body 14; the sludge discharge pipe 1512 of the solid contact clarifier 5 It communicates with the sludge treatment system 9 .

High-efficiency quicksand filter 6 comprises sealed casing 21, is communicated with waste water inlet pipe 19 on the casing 21, and one end of waste water inlet pipe 19 is positioned at the top of casing 21 outer walls, and the other end is positioned at the bottom in casing 21; Also be provided with waste water discharge pipe 18 in, one end of waste water discharge pipe 18 is positioned at the bottom in housing 21, and the other end is positioned at the top of housing 21 outer walls; A water distributor 22 is also provided in the housing 21, and the water distributor 22 is connected to the waste water inlet pipe 19. The housing 21 is also provided with a sand-guiding cone 17, the sand-guiding cone 17 is trumpet-shaped, the sand-guiding cone 17 is sleeved on the waste water discharge pipe 18, and the larger end of the sand-guiding cone 17 faces the The bottom of the casing 21.

The waste water inlet pipe 19 includes an annular water distribution tank 25, which is located at the bottom of the waste water inlet pipe 19, and the annular water distribution tank 25 is connected to the water distributor 22. Wastewater discharge pipe 18 comprises sand lifting pipe 24, and sand lifting pipe 24 is vertically arranged in housing 21, and the top of sand lifting pipe 24 is provided with sand washing device 23, and the sand lifting pipe 24 of sand washing device 23 is connected.

The working principle of an embodiment of the utility model: various industrial wastewater in thermal power plants, including regular wastewater and non-routine wastewater. Regular wastewater mainly includes wastewater from chemical desalination stations and condensate polishing workshops, chemical wastewater from chlorine plants, and wastewater from equipment and ground flushing; non-routine wastewater mainly includes flushing drainage from air preheaters and flue gas heat exchangers Clean the waste water, collect all the waste water into the waste water storage tank 1 for storage for subsequent treatment, the waste water stored in the waste water storage tank 1 is periodically aerated and stirred by the Roots blower to prevent the deposition of suspended solids, and sodium hypochlorite needs to be added at the same time Used to oxidize heavy metals and reduce COD. When the liquid level of the oxidized waste water reaches the set value, the waste water delivery pump 2 is started to send it into the pH adjustment tank 3 and the reaction tank 4 in sequence. In the pH adjustment tank 3, the acid-base dosing pump is automatically started to adjust the pH of the raw water through the monitoring of the pH meter, and the sulfide is added to the reaction tank 4 to capture and condense heavy metals so that they can be removed in subsequent clarification and filtration.

The water produced in the pH adjustment tank 3 flows into the solid contact clarifier 5 by itself, and flocculants and coagulants are added to the water inlet of the solid contact clarifier 5 to enhance the treatment effect of the solid contact clarifier 5 . This solid contact clarifier 5 is different from the traditional mechanical accelerated clarifier, it is completed in a processing structure by concentrating mixing, solid internal circulation, solid particle contact flocculation and gravity sedimentation separation. The influent water first contacts with the previously settled solids in the guide tube 12, and the agitation in the reaction well 13 effectively promotes the growth of flocs during the chemical sedimentation process, and they are separated by gravity sedimentation in the clarification zone, and the supernatant The liquid flows out through the radial outlet groove. The slowly rotating scraper 11 concentrates the settled sludge to the center of the bottom of the tank body 14, most of the sludge flows back to participate in the solid contact, and the excess sludge is discharged out of the tank and enters the sludge treatment unit for further treatment.

The supernatant of the solid contact clarifier 5 flows into the high-efficiency quicksand filter 6. This high-efficiency quicksand filter is an innovative and uniquely designed high-tech environmental protection product. Its filtration and sand washing are carried out at the same time without backwashing. Continuous automatic operation for 24 hours, the ingenious sand lifting and sand washing structure of this equipment replaces the traditional high-power backwashing system, and the energy consumption is extremely low. At the same time, the system does not require maintenance and supervision, and the management is simple. The operation of the high-efficiency quicksand filter 6 can be divided into two relatively independent and simultaneous processes of raw water filtration and filter material cleaning and regeneration. The two are completed at different positions of the same filter, the former is powered by high head or pump lift, while the latter is completed by compressed air. When filtering, the raw water enters from the bottom annular water distributor 22 of the high-efficiency quicksand filter 6, flows upward and fully and evenly contacts the filter material, the suspended solids in the raw water are trapped on the filter bed, and the clean water overflows from the outlet weir at the top emission.

While filtering, the quartz sand that retains pollutants is lifted to the sand washing device 23 at the top by the sand lifting device at the bottom for cleaning. The power used for sand lifting is compressed air. Due to the intense friction of water and sand under the action of compressed air, the sundries trapped by the sand are washed out. The washed sand is added to the filter bed from top to bottom due to gravity in the sand washer, and the sand washing water is discharged through a separate pipeline to complete the entire sand washing process.

The high-efficiency quicksand filter realizes fluidized dynamic filtration. The high-turbidity water in the water inlet area and the high-contamination quartz sand are subjected to reverse contact filtration. The high-contamination quartz sand is lifted by the air and sent to the sand washing tank, and the cleaned quartz sand is replenished Low turbidity effluent area, thereby solving the technical problem of shallow pollution of quartz sand in the side filter of circulating water, and effluent turbidity not up to standard.

Claims (8)

1. thermal power plant's industrial wastewater treatment system, it is characterised in that include the wastewater holding chamber (1) being sequentially communicated, give up Water delivery pump (2), PH regulating tank (3), reactive tank (4), solid contact depositing reservoir (5), efficient stream sand filter (6), neutralization pond (7) and blowoff basin (8), the bottom of solid contact depositing reservoir (5) is communicated with sludge treating system (9).

A kind of thermal power plant the most according to claim 1 industrial wastewater treatment system, it is characterised in that solid contact is clarified Pond (5) includes cell body (14), observation well (13) and guide shell (12), and observation well (13) is suspended in cell body (14), guide shell (12) one end is positioned at observation well (13), and the other end is suspended at the bottom of cell body (14), and guide shell is provided with lifting leaf in (12) Wheel；The water inlet pipe (10) connection guide shell (12) of solid contact depositing reservoir (5), the outlet pipe (16) of solid contact depositing reservoir (5) The top of connection cell body (14)；The discharge pipeline (15) of solid contact depositing reservoir (5) connects with described sludge treating system (9).

A kind of thermal power plant the most according to claim 2 industrial wastewater treatment system, it is characterised in that the end of cell body (14) Portion is provided with and the mud scraper (11) driving motor to be connected.

4. according to a kind of thermal power plant industrial wastewater treatment system described in claim 1 or 2 or 3, it is characterised in that efficient stream Sand filter (6) includes the housing (21) sealed, and housing (21) is communicated with waste water inlet pipe (19), one end of waste water inlet pipe (19) Being positioned at the top of housing (21) outer wall, the other end is positioned at the bottom of housing (21)；Housing is additionally provided with wastewater discharge pipe in (21) (18), one end of wastewater discharge pipe (18) is positioned at the bottom of housing (21), and the other end is positioned at the top of housing (21) outer wall；High The clear water output (20) of effect shifting sand filter (6) is positioned at the top of housing (21).

A kind of thermal power plant the most according to claim 4 industrial wastewater treatment system, it is characterised in that described housing (21) Inside being additionally provided with water-locator (22), water-locator (22) is connected with waste water inlet pipe (19).

A kind of thermal power plant the most according to claim 5 industrial wastewater treatment system, it is characterised in that described housing (21) Inside it is additionally provided with and leads abrasive cone bucket (17), lead abrasive cone bucket (17) and become horn-like, lead abrasive cone bucket (17) and be set on wastewater discharge pipe (18), Lead the bottom towards described housing (21), one end that abrasive cone bucket (17) is relatively large in diameter.

A kind of thermal power plant the most according to claim 6 industrial wastewater treatment system, it is characterised in that waste water inlet pipe (19) Including annular water distribution groove (25), annular water distribution groove (25) is positioned at the bottom of waste water inlet pipe (19), annular water distribution groove (25) and water distribution Device (22) is connected.

A kind of thermal power plant the most according to claim 7 industrial wastewater treatment system, it is characterised in that wastewater discharge pipe (18) including that sand extraction tube (24), sand extraction tube (24) are vertically arranged in housing (21), the top of sand extraction tube (24) is provided with washed-out sand dress Putting (23), the sand extraction tube (24) of sand-washing device (23) is connected.