CN108706805B

CN108706805B - Processing system of laundry waste water

Info

Publication number: CN108706805B
Application number: CN201810529809.1A
Authority: CN
Inventors: 何佳遥
Original assignee: Hangzhou Lyuyi Environmental Protection Technology Co ltd
Current assignee: Hangzhou Lyuyi Environmental Protection Technology Co ltd
Priority date: 2018-05-29
Filing date: 2018-05-29
Publication date: 2021-04-02
Anticipated expiration: 2038-05-29
Also published as: CN112624441A; CN112694196A; CN108706805A

Abstract

The invention discloses a treatment system for wastewater of a laundry, which comprises a water storage tank, a grid tank, a sediment tank, a multifunctional treatment tank, a disinfection tank, a residue tank, an automatic feeding bin, a clean water tank and the like. The multifunctional treatment tank is designed in an inverted trapezoid shape, the top of the tank is horizontal to the ground, one end of the water inlet is suspended on the ground, one end of the water outlet is connected with the ground, the included angle between the trapezoid inclined plane and the ground is 30 degrees, the tank wall is made of reinforced concrete, a heat-insulating and corrosion-resistant material is added, and a waterproof and heat-insulating pattern layer is added inside the tank wall. The treatment effect of COD of the laundry wastewater treated by the system can reach more than 99.5%, the treatment effect of suspended matters can reach more than 99.9%, the treatment effect of ammonia nitrogen can reach more than 98.3%, the treatment effect of total phosphorus can reach more than 98.0%, the treatment effect of an anion detergent can reach more than 97.0%, and the treatment effect of escherichia coli and microorganisms can reach more than 99.8%.

Description

Processing system of laundry waste water

Technical Field

The invention discloses a treatment system for wastewater of a laundry, belonging to the field of wastewater treatment in environmental protection.

Background

The main pollutants in the laundry wastewater are analyzed, and the pollutants come from detergents. The main active ingredients of the detergent are surfactant and cleaning agent, and in addition, auxiliary ingredients such as bleaching agent, fluorescent whitening agent, anti-corrosion agent, foam regulator and enzyme are also contained. The common surfactants used in the detergent are sodium Alkyl Benzene Sulfonate (ABS) and linear alkyl benzene sulfonate (LAS), and ABS is not easy to biodegrade and has long retention time in the environment. The biodegradability of LAS is obviously improved, but both have benzene nucleus and can not be completely decomposed. Both ABS and LAS require phosphates as detergents. Phosphate is discharged into water and is an important reason for eutrophication. In addition, the detergent can emulsify and disperse hydrophobic organic pollutants such as petroleum products, polychlorinated biphenyl and the like entering the water body, and a large amount of foam existing in the detergent sewage and the content of the detergent reach a certain concentration, which bring difficulty to the wastewater treatment.

Sodium polyacrylate is a water-soluble high-molecular compound. The sodium polyacrylate in a commercial form has the relative molecular mass of hundreds of small and tens of millions, is colorless or light yellow viscous liquid, gel, resin or solid powder in appearance, and is easy to dissolve in water. The pH of the aqueous solution is generally between 6 and 9, depending on the degree of neutralization. Can be ionized with or without corrosiveness. It is easy to dissolve in sodium hydroxide aqueous solution, but it is dissolved first and then precipitated in the aqueous solution of calcium hydroxide, magnesium hydroxide, etc. as the quantity of alkaline earth metal ions increases. Is nontoxic.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides a treatment system for wastewater of a laundry, which is characterized by comprising a water storage tank, a grating tank, a sediment tank, a multifunctional treatment tank, a disinfection tank, a residue tank, an automatic feeding bin, a clean water tank and the like.Wherein, the wastewater generated in the process of washing clothes from a laundry is connected with the water inlet of the water storage tank through a wastewater pipeline, the water outlet of the water storage tank is connected with the water inlet of the grid tank through a pipeline, the water outlet of the grid tank is connected with the water inlet of the dreg settling tank through a pipeline, the water outlet of the dreg settling tank is connected with the water inlet of the multifunctional treatment tank through a pipeline, the water outlet of the multifunctional treatment tank is connected with the water inlet of the disinfection tank through a pipeline, the water outlet of the disinfection tank is connected with the water inlet of the clean water tank through a pipeline, the water outlet of the clean water tank is connected with a drainage recycling pipeline, the first discharge port of the automatic feeding bin is connected with the first feed port of the multifunctional treatment tank through a pipeline, the second discharge port of the automatic feeding bin is connected with the second feed port of the multifunctional treatment tank through a pipeline, the third discharge port of the automatic feeding bin is connected with, the slag discharge port of the slag settling tank is connected with the second slag inlet of the slag residual tank through a pipeline, the discharge port of the multifunctional treatment tank is connected with the third slag inlet of the slag settling tank through a pipeline, and the return port of the clean water tank is connected with the spray inlet of the multifunctional integrated tank through a pipeline. Wherein: the multifunctional treatment tank comprises: the device comprises a primary absorption area, a middle-stage absorption area, a high-stage absorption area, a gasification area, a condensation area, a clear water buffer area, a first feed port, a second feed port, a third feed port, an air cooling system, a water mist system, a thermometer, a pressure gauge, a flowmeter, a water inlet, a water outlet, a pool wall, a glass guide pipe, a water outlet, a stainless steel filter screen, a heating device and the like. The primary absorption area accounts for 25 percent of the tank body, the inner filler is sodium polyacrylate particles, and the particle size is 0.5 cm. The middle-stage absorption area accounts for 20 percent of the tank body, the internal filler is sodium polyacrylate spheres, and the diameter of each sphere is 2 cm. The high-grade absorption zone accounts for 15 percent of the tank body, the internal filler is a sodium polyacrylate honeycomb body, and the average volume of the filler is 12cm³. The primary absorption region, the middle absorption region and the corresponding top of the high absorption region are respectively provided with a sodium polyacrylate feed inlet, and the filling is added before the wastewater enters the tank body through remote control. The three absorption areas are separated by a stainless steel filter screen, two stainless steel water-blocking plates are respectively arranged on two sides of the three absorption areas, the stainless steel filter screen and the stainless steel water plate can be folded up and down, and meshes of the stainless steel filter screen are rhombicThe mesh area is 2.5m². The gasification zone accounts for 20 percent of the tank body, the bottom of the gasification zone is provided with a heating device, a heating plate is arranged on the heating device, the gasification zone is totally closed in the gasification zone and is provided with a thermometer and a pressure gauge, and a pipeline connected with a discharge port at the bottom is reserved on the heating plate. The condensation zone accounts for 15% of the tank body, a plurality of groups of air cooling systems are installed at the bottom, a plurality of groups of glass guide pipes are installed at the top, the interval between each group of glass guide pipes is 25cm, the glass guide pipes are connected with the gasification zone and the clear water buffer zone, the gasification zone and the clear water buffer zone are designed in a totally closed mode in the zone, and a plurality of groups of water mist systems are. The clear water buffer zone accounts for 5 percent of the tank body, and the cooled water in the glass guide pipe flows through the zone in a gathering way and then flows out of the tank body from the water outlet.

The multifunctional treatment tank is designed in an inverted trapezoid shape, the tank top is horizontal to the ground, one end of the water inlet is suspended on the ground, one end of the water outlet is connected with the ground, an included angle between a trapezoid inclined plane and the ground is 30 degrees, the tank wall is made of reinforced concrete, a heat insulation and corrosion prevention material is added, and a waterproof heat insulation layer is added inside the tank wall.

Wherein the highest heating temperature in the gasification zone in the multifunctional treatment tank is set to be 110 ℃, the temperature rise time is set to be 10min, and the stabilization time is 120 min.

Wherein, the grid pond adopts fine grid, and the sediment pond is stood for 1 h. An automatic slag scraping machine is arranged at the bottom in the slag settling tank. The disinfection tank adopts an ozone disinfection method.

Wherein the retention time of the wastewater of the laundry in the primary absorption area is 30min, the retention time of the wastewater of the middle absorption area is 25min, and the retention time of the wastewater of the high absorption area is 20 min.

Wherein, the water treated by the clean water tank is recycled to the water mist system, and the water mist quantity generated by a spray head of the water mist system is 0.5cm³/s。

The invention has the advantages that:

(1) the sewage treatment system is suitable for strict local regulations and standards, can reach the environment-friendly water quality discharge limit meeting the requirements, and is suitable for sewage treatment of various laundries.

(2) The treatment effect of COD of the laundry wastewater treated by the system can reach more than 99.5%, the treatment effect of suspended matters can reach more than 99.9%, the treatment effect of ammonia nitrogen can reach more than 98.3%, the treatment effect of total phosphorus can reach more than 99.8%, the treatment effect of an anion detergent can reach more than 99.7%, and the treatment effect of escherichia coli and microorganisms can reach more than 99.9%.

(3) The system is originally designed, is not provided with a sludge system, cannot generate malodorous gases such as methane, and is energy-saving and environment-friendly.

(4) The residue part treated by the system contains a large amount of components such as nitrogen, phosphorus, potassium, sodium and the like, and can be reused in soil for flower nursery planting, thereby being beneficial to the growth of plants.

Drawings

FIG. 1 is a schematic diagram of the apparatus of the present invention.

In the figure: 1-water storage tank, 2-grid tank, 3-sediment tank, 4-multifunctional treatment tank, 5-disinfection tank, 6-residue tank, 7-automatic feeding bin and 8-clean water tank

FIG. 2 is a schematic top view of the multi-purpose processing cell.

In the figure: 41-primary absorption zone, 42-middle-stage absorption zone, 43-advanced absorption zone, 44-gasification zone, 45-condensation zone, 46-clear water buffer zone, 47-first feed inlet, 48-second feed inlet, 49-third feed inlet, 410-air cooling system, 411-water fog system, 412-thermometer, 413-pressure gauge, 414-flowmeter, 415-water inlet, 416-water outlet, 417-pool wall, 418-glass conduit, 419-water outlet, 420-stainless steel filter screen and 421-heating device.

Detailed Description

A laundry wastewater treatment system as shown in fig. 1, comprising: 1-a water storage tank, 2-a grid tank, 3-a sediment tank, 4-a multifunctional treatment tank, 5-a disinfection tank, 6-a residue tank, 7-an automatic feeding bin and 8-a clean water tank. Wherein, the waste water that comes from laundry washing clothing in-process and produces passes through the water inlet of waste water pipe connection tank 1, the water inlet of pipe connection grid pond 2 is passed through to the delivery port of tank 1, waste water filters the button that probably drops on the clothing in grid pond 2, perhaps matters such as metal paper bits that persist in the pocket, get into sediment pond 6 by the pipeline, the water inlet of pipe connection sediment pond 3 is passed through to the delivery port of grid pond 2, in sediment pond 3, it is 1h to stew for a long time, earth, tiny granule that exist in the waste water in with the waste waterThe particles and some sundries such as the cloth silk whiskers are filtered and precipitated, the wastewater flows away, and the precipitate is scraped out of the residue tank 3 by the residue scraper and is sent into the residue tank 6. The water outlet of the slag settling tank 3 is connected with the water inlet of the multifunctional treatment tank 4 through a pipeline, the water outlet of the multifunctional treatment tank 4 is connected with the water inlet of the disinfection tank 5 through a pipeline, and the disinfection tank 5 adopts an ozone disinfection method. The delivery port of disinfection pond 5 passes through the water inlet of pipe connection clean water basin 8, the drainage retrieval and utilization pipeline is connected to the delivery port of clean water basin 8, the first feed inlet of the multi-functional processing pond 4 of pipe connection is passed through to the first discharge gate of automatic feed storehouse 7, the second feed inlet of the multi-functional processing pond 4 of pipe connection is passed through to the second discharge gate of automatic feed storehouse 7, the third feed inlet of the multi-functional processing pond 4 of pipe connection is passed through to the third discharge gate of automatic feed storehouse 7, the first income cinder notch of the cinder notch of grid pond 2 through pipe connection cinder pond 6, the cinder notch of the row cinder notch of cinder notch in cinder pond 3 through the second income cinder notch of pipe connection cinder pond 6, the third income cinder notch of the multifunctional processing pond 4 through pipe connection cinder pond 6, the backward flow mouth of clean water basin 8 passes through the spraying entry of the multi-functional integrative pond 4 of pipe connection. Wherein: the multifunctional treatment tank comprises: : 41-primary absorption zone, 42-middle-stage absorption zone, 43-advanced absorption zone, 44-gasification zone, 45-condensation zone, 46-clear water buffer zone, 47-first feed inlet, 48-second feed inlet, 49-third feed inlet, 410-air cooling system, 411-water fog system, 412-thermometer, 413-pressure gauge, 414-flowmeter, 415-water inlet, 416-water outlet, 417-pool wall, 418-glass conduit, 419-water outlet, 420-stainless steel filter screen and 421-heating device. The primary absorption area 41 accounts for 25 percent of the tank body, and the inner filler is sodium polyacrylate particles with the particle size of 0.5 cm. And (3) closing the stainless steel water-blocking plate, wherein the retention time of the wastewater in the region is 30min, the wastewater is fully absorbed by the sodium polyacrylate, the water-absorbing expansion volume of the sodium polyacrylate is increased to fill the whole region, after the water-absorbing expansion volume reaches the maximum value, opening the stainless steel water-blocking plate, allowing the wastewater to flow into the next region through the gap of the stainless steel filter screen 420, and allowing the sodium polyacrylate to stay in the region. The middle-stage absorption zone 42 accounts for 20 percent of the tank body, the internal filler is sodium polyacrylate spheres, the diameter of each sphere is 2cm, and the retention time of wastewater in the middle-stage absorption zone 42 is 25min, which is the same as that in the front zone. The high-grade absorption zone 43 accounts for 15 percent of the tank body, the inner filler is a sodium polyacrylate honeycomb body,average volume of filler was 12cm³The retention time of the waste water in the higher absorption zone 43 is 20min, the same as in the former zone. After the wastewater in the three areas is sucked dry, the water flows down the ladder structure of the designed multifunctional treatment tank 4, the top of the tank is horizontal to the ground, one end of the water inlet is suspended on the ground, one end of the water outlet is connected with the ground, the included angle between the trapezoidal inclined plane and the ground is 30 degrees, the stainless steel filter screens 420 and the water blocking plates in the three areas are folded, and the polypropylene trisodium full of water automatically flows onto the heating plate of the gasification area 44 under the action of gravity. The primary absorption area 41, the intermediate absorption area 42 and the high absorption area 43 are respectively provided with a sodium polyacrylate feeding port at the corresponding top, and the filling is carried out before the wastewater enters the tank body through remote control. The three absorption areas are separated by a stainless steel filter screen 420, two stainless steel water-blocking plates are respectively arranged on two sides of the absorption areas, the stainless steel filter screen and the stainless steel water-blocking plates can be folded up and down, the meshes of the stainless steel filter screen are designed in a diamond shape, and the area of each mesh is 2.5m². The gasification zone 44 accounts for 20% of the tank body, the bottom is provided with a heating device 421, the heating device 421 is provided with a heating plate, the zone is totally closed and is provided with a thermometer 412 and a pressure gauge 413, a pipeline connected with a discharge port at the bottom is reserved on the heating plate, the tank wall is made of reinforced concrete, a heat-insulating and corrosion-resistant material is added, and a waterproof and heat-insulating layer is added inside the tank wall. At this time, all valves are closed, the gasification zone 44 becomes a sealed zone, the heating system 421 starts to work, the maximum temperature is set to be 110 ℃, the temperature rise time is set to be 10min, and the stabilization time is 120 min. The sodium polyacrylate after absorbing water is heated to gradually decompose water, and changed into water vapor which enters the condensation area 45 along the glass conduit 418. The sodium polyacrylate after losing water is discharged into the residue tank 6 through a pipeline after a discharge hole reserved on the heating plate is opened. The condensation area 45 accounts for 15% of the tank body, the bottom of the condensation area is provided with a plurality of groups of air cooling systems 410, the top of the condensation area is provided with a plurality of groups of glass guide pipes 418, each group of glass guide pipes 418 is spaced by 25cm, the glass guide pipes 418 are connected with the gasification area 44 and the clean water buffer area 46, the area is totally closed, the topmost of the condensation area is provided with a plurality of groups of water mist systems 411, the air cooling systems 410 and the water mist systems 411 are started simultaneously, water treated by the clean water tank 8 is recycled to the water mist systems 411, and the amount³The water vapor flowing through the glass conduit 418 changes into liquid when cooled and flows to clean water slowlyAnd (5) punching the area. The clear water buffer zone 4646 accounts for 5 percent of the tank body, and the cooled water in the glass conduit 418 flows through the zone in a gathering way and then flows out of the tank body from the water outlet.

Claims

1. A treatment system for wastewater of a laundry is characterized by comprising a water storage tank, a grid tank, a sediment tank, a multifunctional treatment tank, a disinfection tank, a residue tank, an automatic feeding bin and a clean water tank; wherein, the wastewater generated in the process of washing clothes from a laundry is connected with the water inlet of the water storage tank through a wastewater pipeline, the water outlet of the water storage tank is connected with the water inlet of the grid tank through a pipeline, the water outlet of the grid tank is connected with the water inlet of the dreg settling tank through a pipeline, the water outlet of the dreg settling tank is connected with the water inlet of the multifunctional treatment tank through a pipeline, the water outlet of the multifunctional treatment tank is connected with the water inlet of the disinfection tank through a pipeline, the water outlet of the disinfection tank is connected with the water inlet of the clean water tank through a pipeline, the water outlet of the clean water tank is connected with a drainage recycling pipeline, the first discharge port of the automatic feeding bin is connected with the first feed port of the multifunctional treatment tank through a pipeline, the second discharge port of the automatic feeding bin is connected with the second feed port of the multifunctional treatment tank through a pipeline, the third discharge port of the automatic feeding bin is connected with, the slag discharge port of the slag settling tank is connected with the second slag inlet of the slag settling tank through a pipeline, the discharge port of the multifunctional treatment tank is connected with the third slag inlet of the slag settling tank through a pipeline, and the return port of the clean water tank is connected with the spraying inlet of the multifunctional integrated tank through a pipeline; wherein: the multifunctional treatment tank comprises: the device comprises a primary absorption area, a middle-stage absorption area, a high-stage absorption area, a gasification area, a condensation area, a clear water buffer area, a first feed port, a second feed port, a third feed port, an air cooling system, a water mist system, a thermometer, a pressure gauge, a flowmeter, a water inlet, a water outlet, a pool wall, a glass conduit, a water outlet, a stainless steel filter screen and a heating device, wherein the primary absorption area accounts for 25% of the pool body, the internal filler is sodium polyacrylate particles with the particle size of 0.5cm, the middle-stage absorption area accounts for 20% of the pool body, the internal filler is sodium polyacrylate spheres with the diameter of 2cm, the high-stage absorption area accounts for 15% of theSodium polyacrylate honeycomb with filler average volume of 12cm³The primary absorption area, the middle absorption area and the corresponding top of the high absorption area are respectively provided with a sodium polyacrylate feed inlet, the filling is added before the wastewater enters the tank body through remote control, the three absorption areas are separated by a layer of stainless steel filter screen, two sides of the three absorption areas are respectively provided with a stainless steel water baffle, the stainless steel filter screen and the stainless steel water baffle can be folded up and down, the meshes of the stainless steel filter screen are designed in a diamond shape, and the area of the meshes is 2.5m²The gasification zone accounts for 20% of the tank body, the bottom is provided with a heating device, the heating device is provided with a heating plate, the region is internally provided with a totally-enclosed design, the thermometer and the pressure gauge are arranged, a pipeline connected with a bottom discharge port is reserved on the heating plate, the condensation zone accounts for 15% of the tank body, the bottom is provided with a plurality of groups of air cooling systems, a plurality of groups of glass guide pipes are arranged at the top, each group of glass guide pipes is spaced by 25cm, the glass guide pipes are connected with the gasification zone and a clear water buffer zone, the region is internally provided with a totally-enclosed design, the topmost part is provided with a plurality of groups of water mist systems.

2. The laundry wastewater treatment system according to claim 1, wherein the multifunctional treatment tank is of inverted trapezoidal design, the top of the tank is horizontal to the ground, one end of the water inlet is suspended on the ground, one end of the water outlet is connected with the ground, the inclined plane of the trapezoid forms an angle of 30 degrees with the ground, the tank wall is made of reinforced concrete, and a heat-insulating and corrosion-preventing material and a waterproof and heat-insulating layer are added inside the tank wall.

3. The laundry wastewater treatment system according to claim 1, wherein the maximum heating temperature in the gasification zone in the multifunctional treatment tank is set to 110 ℃, the temperature rise time is set to 10min, and the stabilization time is 120 min.

4. The laundry wastewater treatment system according to claim 1, wherein the grid tank adopts a fine grid, the sediment tank is kept still for 1 hour, an automatic residue scraper is arranged at the bottom in the sediment tank, and the disinfection tank adopts an ozone disinfection method.

5. The laundry wastewater treatment system according to claim 1, wherein the laundry wastewater has a retention time of 30min in the primary absorption zone, 25min in the middle absorption zone and 20min in the advanced absorption zone.

6. The laundry wastewater treatment system of claim 1, wherein the water treated by the clean water tank is recycled to the water mist system, and the water mist system nozzle generates water mist with a volume of 0.5cm³/s。