CN215592872U

CN215592872U - Wastewater treatment system

Info

Publication number: CN215592872U
Application number: CN202122008842.XU
Authority: CN
Inventors: 杨全文; 张汝明; 陈晓亭; 王昌伟; 徐芳乐; 齐文静; 陈福军; 侯宁
Original assignee: Shandong Luxin Design Engineering Co ltd
Current assignee: Shandong Luxin Design Engineering Co ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-01-21
Anticipated expiration: 2031-08-24

Abstract

The present invention relates to a wastewater treatment system comprising: the device comprises a preheater, a heater, a clear liquid filtering intermediate tank and a filter; the preheater exchanges heat between the waste water and the filtrate from the filter; the heater heats the waste water after heat exchange by the preheater; the filter filters the wastewater heated by the heater into a filtrate; the filtered clear liquid after being filtered by the filter enters the preheater through a clear liquid intermediate tank. The waste water enters the preheater through the storage tank. And discharging the filtered liquid after heat exchange of the preheater into a sewage treatment system. The heater heats the materials through steam, and steam condensate water with waste heat from the heater enters a middle tank of the filtrate. The equipment and the process are simple, the resource can be recycled, and the resource waste and pollution are avoided.

Description

Wastewater treatment system

Technical Field

The utility model relates to the technical field of wastewater treatment, in particular to a wastewater treatment system.

Background

In the process of producing capsules by using hydroxypropyl methyl cellulose as a main raw material, water for washing a reaction tank contains a large amount of hydroxypropyl methyl cellulose, and the hydroxypropyl methyl cellulose is directly discharged into a sewage treatment station.

Hydroxypropyl methylcellulose is a nonionic cellulose mixed ether, and belongs to one of nonionic cellulose mixed ethers. It is a semi-synthetic, inactive, viscoelastic polymer, stable in property, not easy to be biochemically treated, causing COD of sewage not to reach standard, and unable to be directly discharged.

The waste water containing hydroxypropyl methyl cellulose is treated by various chemical and biochemical methods and is basically difficult to treat. The waste water containing hydroxypropyl methyl cellulose is directly discharged into a sewage treatment station, has stable property, is not easy to be biochemically treated, and causes the COD of the sewage not to reach the standard. The solubility of the hydroxypropyl methyl cellulose in cold water is about 2 percent, and certain waste is caused by direct treatment and discharge.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems in the background art, the utility model provides a wastewater treatment system, which has simpler process and equipment, can realize the cyclic utilization of resources and avoids the waste and pollution of the resources.

The hydroxypropyl methyl cellulose has the characteristics that the hydroxypropyl methyl cellulose can be coagulated and separated out when the water temperature is more than 70-90 ℃, and the separated hydroxypropyl methyl cellulose can be separated out after filtration. The temperature of the filtered filtrate can be kept at about 70 ℃, in order to fully utilize the heat, the temperature of the filtrate is raised to about 50 ℃ after the filtrate exchanges heat with raw water through a preheater, and the filtrate is discharged into a sewage station after the temperature of the filtrate is reduced.

Most of hydroxypropyl methyl cellulose in the filtrate after heating and temperature rise filtration is separated, the subsequent sewage retreatment is basically not influenced, and the COD of the sewage can reach the standard easily.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a wastewater treatment system comprising: the device comprises a preheater, a heater, a clear liquid filtering intermediate tank and a filter; the preheater exchanges heat between the waste water and the filtrate from the filter; the heater heats the waste water after heat exchange by the preheater; the filter filters the wastewater heated by the heater into a filtrate; the filtered clear liquid after being filtered by the filter enters the preheater through a clear liquid intermediate tank.

Further, the waste water enters the preheater through the storage tank.

And further, discharging the filtered liquid subjected to heat exchange by the preheater into a sewage treatment system.

Furthermore, the heater heats the materials through steam, and steam condensate water with waste heat from the heater enters a middle tank of the filtrate.

The utility model has the beneficial effects that:

1. the process and the equipment are simple, the whole process can be automated, and because a heating method is adopted instead of an evaporation method, the energy consumption is low, the energy consumption is 1/10 of that of evaporation equipment, and the equipment investment is low.

2. The simplest method is used for realizing the cyclic utilization of resources and avoiding the waste and pollution of the resources.

3. The recovered hydroxypropyl methyl cellulose can be further processed into byproducts by utilizing the characteristics of thickening capacity, salt resistance, low ash content, pH stability, water retention property, size stability, excellent film forming property, wide enzyme resistance, dispersibility, cohesiveness and the like, is applied to the industries of synthetic resin, petrochemical industry, ceramics, papermaking, leather, medicine, food, cosmetics and the like, and changes waste into valuable.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic diagram of the structure of the present invention.

In the figure:

1. the device comprises a storage tank, 2 parts of a preheater, 3 parts of a heater, 4 parts of a filtrate intermediate tank and 5 parts of a filter.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

A wastewater treatment system comprising: a preheater 2, a heater 3, a clear filtrate intermediate tank 4 and a filter 5; the preheater 2 exchanges heat between the wastewater and the filtered solution from the filter 5; the heater 3 heats the waste water after heat exchange by the preheater 2; the filter 5 filters the wastewater heated by the heater 3 into a filtrate; the filtered liquid after being filtered by the filter 5 enters the preheater 2 through the filtered liquid intermediate tank 4. The waste water enters a preheater 2 through a storage tank 1. And discharging the filtered liquid subjected to heat exchange by the preheater 2 into a sewage treatment system. The heater 3 heats the materials through steam, and steam condensate water with waste heat from the heater 3 enters the middle tank 4 of the filtrate.

The specific working method comprises the following steps:

1. waste water (material temperature 20 ℃) in a workshop is pumped into the preheater 2 from the storage tank 1 by a pump and exchanges heat with filtrate (temperature is about 70 ℃) discharged from the filter 5, and the material temperature is increased to about 50 ℃.

2. The material is heated by the preheater 2 and then enters the heater 3, and the temperature of the material is raised to 80 ℃ under the heating of steam. Meanwhile, steam condensate water enters the intermediate tank 4 of the filtrate, and the waste heat of the condensate water is fully utilized.

3. The material gets into filter 5 after coming out from heater 3, and solid material carries out recycle after the filtration, and the filter liquor temperature still is about 70 degrees, for make full use of heat energy, gets into preheater 2 through straining clear liquid intermediate tank 4 and preheats the material, reaches energy-conserving effect.

4. The filtered liquid after the waste heat is recovered by the preheater 2 enters a sewage treatment system for biochemical treatment. Most of hydroxypropyl methyl cellulose which is difficult to be biochemically treated in the wastewater after the heating and filtering is separated for recycling, so that the economic benefit is improved, and the difficulty of biochemical treatment of later-stage sewage is reduced.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A wastewater treatment system is characterized in that,

the method comprises the following steps: a preheater (2), a heater (3), a clear filtrate intermediate tank (4) and a filter (5); the preheater (2) exchanges heat between the wastewater and the filtered liquid from the filter (5); the heater (3) heats the waste water after heat exchange by the preheater (2); the filter (5) filters the wastewater heated by the heater (3) into a filtrate; and the filtered clear liquid filtered by the filter (5) enters the preheater (2) through the clear liquid intermediate tank (4).

2. A wastewater treatment system according to claim 1, characterized in that:

and the waste water enters the preheater (2) through the storage tank (1).

3. A wastewater treatment system according to claim 1, characterized in that:

and the filtered liquid after heat exchange by the preheater (2) is discharged into a sewage treatment system.

4. A wastewater treatment system according to claim 1, characterized in that:

the heater (3) heats the materials through steam, and steam condensate water with waste heat from the heater (3) enters the middle tank (4) of the filtrate.