CN212222641U

CN212222641U - Backwashing sewage filtering and recycling device for thermal power plant

Info

Publication number: CN212222641U
Application number: CN202020424976.2U
Authority: CN
Inventors: 武建勇; 张勇; 耿奇; 李明辉
Original assignee: Luxi Group Co ltd Power Branch
Current assignee: Luxi Group Co ltd Power Branch
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-12-25
Anticipated expiration: 2030-03-27

Abstract

The utility model relates to a sewage treatment field mainly relates to the sewage treatment field of thermal power plant, specifically provides a backwash sewage of thermal power plant filters recovery unit, including the sedimentation tank, the overflow pond of sedimentation tank for being divided into a plurality of series distributions to set up backwash sewage entry in tip overflow pond, tip overflow pond is the main pond that concentrates of mud. The end part overflow tank is connected with a slurry pump, the slurry pump is connected with a sludge-water separation tank, the sludge-water separation tank comprises a sludge outlet and a sewage outlet, the sludge outlet is connected with a sludge drying device, and the sewage outlet is connected with a sedimentation tank. The other end of the sedimentation tank, which is opposite to the end part overflow tank, is sequentially connected with a manganese sand filter, a security filter and a self-cleaning filter.

Description

Backwashing sewage filtering and recycling device for thermal power plant

Technical Field

The utility model relates to a sewage treatment field mainly relates to the sewage treatment field of thermal power plant, specifically provides a backwash sewage filtration recovery unit of thermal power plant.

Background

Along with the increase of the electricity consumption of residents, the load of a thermal power plant is increased, the generated sewage is more and more, the increase of the production water causes the operating pressure of the filter to be increased, and the backwashing frequency of the filter is increased. The sewage of the thermal power plant mainly comes from boiler pickling waste water, ash flushing water and the like, and the waste water often contains high-concentration soluble iron ions, chlorine radicals, insoluble gel particles and the like which have high dispersity in water and are difficult to recover, and pollutants are directly discharged to cause environmental influence and seriously restrict the utilization rate of the water.

The existing sewage filter has poor treatment effect, the condition that the pressure difference exceeds the standard can occur after one period of operation, backwashing sewage cannot be treated timely and effectively, and a treatment device for backwashing sewage of a thermal power plant is not arranged in the prior art.

SUMMERY OF THE UTILITY MODEL

For solving the problem among the prior art, the utility model provides a filtration recovery unit to thermal power plant's backwash sewage, just long-term sustainable operation can be realized to the device.

The utility model particularly provides a thermal power plant's backwash sewage filters recovery unit, including the sedimentation tank, the overflow tank of sedimentation tank for being divided into a plurality of series distributions to set up backwash sewage entry in tip overflow tank, tip overflow tank is the main pond that concentrates of mud.

The end part overflow tank is connected with a slurry pump, the slurry pump is connected with a sludge-water separation tank, the sludge-water separation tank comprises a sludge outlet and a sewage outlet, the sludge outlet is connected with a sludge drying device, and the sewage outlet is connected with a sedimentation tank.

The other end of the sedimentation tank, which is opposite to the end part overflow tank, is sequentially connected with a manganese sand filter, a security filter and a self-cleaning filter.

Preferably, the self-cleaning filter is connected with an online device, and the online device detects whether the water quality reaches the standard.

Further preferably, the online equipment comprises a turbidity meter, a pH meter, chlorine content detection equipment and a conductivity detection device.

Preferably, a filter element is arranged in the cartridge filter.

Further preferably, the filter element is an activated carbon tubular filter element.

Preferably, the sedimentation tank is also provided with an inlet connected with a water replenishing bin.

Further preferably, the water replenishing bin is connected to the end overflow tank.

Has the advantages that:

1) including the overflow pond of a plurality of series connections in the backwash sewage of thermal power plant filters recovery unit sedimentation tank, the mud that subsides that can be fine, and this application with mud and sewage separation, because the pollutant is more easily soluble in water or easily disperses in the aquatic in the backwash sewage of thermal power plant, therefore pollutant content is lower in the mud, and the easy processing only is handled water with mud separation, and is lower to the requirement of equipment.

2) The utility model discloses manganese sand filter, safety filter, self-cleaning filter have connected gradually, and the large granule colloid is got rid of to the manganese sand filter to with soluble Fe²⁺Oxidation to insoluble Fe³⁺. The sewage passing through the sedimentation tank and the manganese sand filter does not have particles with overlarge sizes, the sewage has small damage to the filter element when passing through the filter element of the security filter under pressure, the order arrangement of the filter is reasonable, the sewage can be effectively removed, and the sustainable operation of the equipment is also considered.

3) The utility model discloses old dress appears as security filter to the remedial device of self-cleaning filter as security filter, can decontaminate when damaging like the filter core and remedy, online equipment is connected to the self-cleaning filter, can rationally control the quality of water purification up to standard, and can control the filtration number of times of self-cleaning filter, flexible operation according to the actual conditions of sewage in the practice. And the self-cleaning filter does not need external power and is very suitable as a remedial device.

Drawings

FIG. 1 is a diagram of a device for filtering and recovering backwash sewage of a thermal power plant according to an embodiment.

Wherein: 1. a sedimentation tank; 11. an end overflow tank; 2. a slurry pump; 3. a mud-water separation tank; 31. mud; 32. water; 4. a manganese sand filter; 5. a cartridge filter; 6. a self-cleaning filter; 7. a sludge drying device; 8. an online device; 9. a water replenishing bin.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in figure 1, the utility model provides a thermal power plant's backwash sewage filters recovery unit, including sedimentation tank 1, sedimentation tank 1 is for dividing into four overflow ponds that establish ties and distribute, and one of them tip overflow pond 11 that is located the tip sets up backwash sewage entry, and backwash sewage is from tip overflow pond 11 access device, and tip overflow pond 11 is the main pond that concentrates of mud.

The end part overflow tank 11 is connected with a slurry pump 2, sludge at the bottom of the end part overflow tank 11 is pumped away, the slurry pump 2 is connected with a mud-water separation tank 3, the mud-water separation tank 3 carries out sedimentation separation on the pumped sludge, the mud-water separation tank 3 comprises a sludge outlet and a sewage outlet, the sludge outlet is connected with a sludge drying device 7, and the sewage outlet is connected with a sedimentation tank 1. The separated sludge 31 enters a sludge drying device 7 for recovery, and Fe in the backwashing sewage²⁺And pollutants such as colloidal particles, chlorine radicals and the like are very easy to dissolve in water, so that the settled sludge is very few in pollutants and easy to treat. The separated sewage 32 enters the sedimentation tank 1 again for overflowing decontamination.

The other end of the sedimentation tank 1 is connected with a manganese sand filter 4, the manganese sand filter 4 contains manganese sand, and the manganese sand comprises MnO as the main component₂Has good oxidability and can dissolve Fe in sewage²⁺Oxidation to insoluble Fe³⁺And the good charge adsorption capacity of the manganese sand can well adsorb large-particle colloid in the sewage.

The manganese sand filter 4 is connected with a security filter 5, and the security filter 5 is internally provided with activityThe carbon and other tubular filter elements are used as filtering elements, under the action of pressure, sewage passes through the filter elements, and insoluble Fe can be removed³⁺Filtering to remove insoluble colloidal particles in water, and removing color, smell, excessive chloride, etc. The requirement of security filter 5 to sewage is higher, if sewage silt content is too big, then harm the filter core easily, shortens life, and the utility model discloses earlier overflow in sedimentation tank 1 for a long time before security filter 5, get rid of most silt, and the large granule colloid has been adsorbed in manganese sand filter 4, and the sewage that gets into in security filter 5 can reach security filter's service standard. Therefore, the device of the utility model has scientific and reasonable connection mode,

the cartridge filter 5 is connected with the self-cleaning filter 6, the self-cleaning filter 6 is connected with an online device 8, the online device 8 comprises a turbidity meter, a pH meter, a chlorine content detection device and a conductivity detection device, and whether the quality of the effluent is qualified or not can be detected. The self-cleaning filter 6 is used for remedying, namely, the water quality passing through the security filter 5 can reach the use standard, if the security filter 5 has temporary faults, such as filter element overdue and the like, the self-cleaning filter 6 is used for remedying pollution removal, and the online equipment 8 can detect whether the sewage is qualified or not and can discharge the sewage until the sewage reaches the use standard. The principle of the self-cleaning filter is realized by opening of a hydraulic valve and action of a piston of a hydraulic cylinder, and the self-cleaning filter is controlled by a backwashing controller. The back-flushing controller can accurately control the hydraulic valve and the hydraulic cylinder according to the pressure difference value transmitted from the inlet and the outlet of the filter, and the power of the controller is from the pressure of the pipeline. Thus, the self-cleaning filter 6 can be performed without using external power, and is low in cost and very cost-effective as a remedial device. And the self-cleaning filter can be cleaned repeatedly, the online equipment 8 strictly controls the sewage discharge index, and the self-cleaning filter can be accurately controlled whether the washing is qualified or not, and the use is flexible.

The water that is qualified by the on-line device 8 can be reused to backwash the filter.

Tip overflow tank 11 still is connected with moisturizing storehouse 9, and when backwash aquatic silt was too much, sediment deposit in the overflow tank, water could not flow, and the pollutant deposits in mud, and mud is difficult to get rid of the pollutant for sewage, and at this moment, moisturizing storehouse 9 in time supplyes moisture, makes the pollutant can be taken away the separation by rivers and purifies.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims

1. The utility model provides a thermal power plant's backwash sewage filters recovery unit which characterized in that: the sludge drying device comprises a sedimentation tank, wherein one end of the sedimentation tank is connected with a sludge pump, the sludge pump is connected with a sludge-water separation tank, the sludge-water separation tank comprises a sludge outlet and a sewage outlet, the sludge outlet is connected with a sludge drying device, and the sewage outlet is connected with the sedimentation tank;

the other end of the sedimentation tank is sequentially connected with a manganese sand filter, a security filter and a self-cleaning filter.

2. The thermal power plant backwashing sewage filtering and recovering device as claimed in claim 1, wherein: the sedimentation tank is an overflow tank.

3. The thermal power plant backwashing sewage filtering and recovering device as claimed in claim 1, wherein: the sedimentation tank is divided into a plurality of overflow tanks distributed in series.

4. The thermal power plant backwashing sewage filtering and recovering device as claimed in claim 1, wherein: a backwashing sewage inlet is formed in an end part overflow tank of the sedimentation tank, and the end part overflow tank is a main sludge concentration tank; the silt pump is connected with the end part overflow tank.

5. The thermal power plant backwashing sewage filtering and recovering device as claimed in claim 1, wherein: the self-cleaning filter is connected with an online device, and the online device detects whether the water quality reaches the standard.

6. The thermal power plant backwashing sewage filtering and recovering device as claimed in claim 5, wherein: the on-line equipment comprises a turbidity meter, a pH meter, chlorine content detection equipment and a conductivity detection device.

7. The thermal power plant backwashing sewage filtering and recovering device as claimed in claim 1, wherein: and a filter element is arranged in the cartridge filter.

8. The thermal power plant backwashing sewage filtering and recovering device as claimed in claim 7, wherein: the filter element is an activated carbon tubular filter element.

9. The thermal power plant backwashing sewage filtering and recovering device as claimed in claim 1, wherein: the sedimentation tank is also provided with an inlet connected with a water replenishing bin.

10. The thermal power plant backwashing sewage filtering and recovering device as claimed in claim 9, wherein: the water replenishing bin is connected to the end part overflow pool.