CN104925901A - Sewage treatment device applying membrane technology - Google Patents

Abstract

The invention discloses a sewage treatment device using membrane technology, which includes a casing and a touch controller, one end of the casing is provided with a liquid inlet pipe, a first liquid suction pump is arranged on the liquid inlet pipe, and a first membrane is arranged in series in the casing module, the second membrane module and the third membrane module, a return pipe is arranged on the front side of each membrane module, an electronically controlled on-off valve is arranged on the return pipe, a second pump is arranged on the return pipe, the first membrane module, the second The water inlet side of the membrane module and the third membrane module is provided with a pressure sensor and a negative pressure nozzle, and the negative pressure nozzle is connected to the telescopic rod. The support body constitutes a support plate, and the membrane is covered on one side of the support plate. The invention has good sewage treatment effect, realizes the function of automatic collection and reuse of reflux liquid, improves filtration rate, shortens maintenance time and has long service life.

Description

A sewage treatment device using membrane technology

technical field

The invention relates to the field of sewage treatment, in particular to a sewage treatment device using membrane technology.

Background technique

Water resources are not only basic natural resources, but also strategic economic resources. The progress and development of modern society cannot be separated from water resources. With the increase of urban population and the development of industrial and agricultural production, the discharge of industrial sewage and urban domestic water is also increasing, far exceeding the self-purification capacity of the environment, making water pollution increasingly serious. With the continuous shortage of water resources and the continuous strengthening of environmental pollution control, people have begun to pay attention to the special treatment of sewage generated by urban hospitals.

In the world, ultrafiltration membrane technology has been widely used. my country's ultrafiltration membrane technology has made great progress. Membrane technology has been widely used in many fields and is recognized as the most promising high-tech technology in the contemporary era. One of the techniques.

Existing water purifiers are mostly ultrafiltration, nanofiltration, activated carbon adsorption, etc. according to water quality treatment methods. When one process is difficult to remove harmful substances in water, two or more processes are used to be a composite type; such as activated carbon adsorption Combined with nanofiltration, activated carbon adsorption combined with ultrafiltration, polypropylene ultrafine fiber combined with activated carbon combined with ultrafiltration, etc.; among composite water purifiers, membrane technology composite water purifiers have excellent water purification performance, especially in the removal of microorganisms (bacteria, algae, etc. ) has a more significant effect. Some of the high-quality water purifiers can directly drink raw water, which has been welcomed by consumers and has become a hot spot in the current development of water purifiers.

Contents of the invention

In order to solve the above problems, the present invention provides a sewage treatment device using membrane technology, which has good sewage treatment effect, realizes the function of automatic collection and reuse of reflux liquid, improves the filtration rate, shortens maintenance time, and has a long service life.

In order to achieve the above object, the technical scheme that the present invention takes is:

A sewage treatment device using membrane technology, including a casing and a touch controller, one end of the casing is provided with a liquid inlet pipe, a first liquid suction pump is arranged on the liquid inlet pipe, and a first membrane module, a second membrane module, and a second Membrane module and the third membrane module, a return pipe is arranged on the front side of each membrane module, an electric control switch valve is arranged on the return pipe, a second liquid suction pump is arranged on the return pipe, the first membrane module, the second membrane module and the second membrane module The water inlet side of the three-membrane module is provided with a pressure sensor and a negative pressure nozzle, and the negative pressure nozzle is connected to the telescopic rod. plate, a film covered on one side of the support plate, and a sealing pressure ring is arranged on the edge of the film, and the negative pressure nozzle is set close to the film; the film is composed of the following raw materials in parts by mass:

20-30 parts of polyvinylidene fluoride, 20-30 parts of polysulfoneamide, 3-9 parts of vinylpyrrolidone, 6-12 parts of polyacrylonitrile, 5-20 parts of polyethylene glycol, 0.08-0.52 parts of carbon nanotubes;

The other end of the casing 1 is connected to a ceramic membrane filter through a pipeline, and a spiral coil is arranged inside the ceramic membrane filter, and the inner wall of the spiral coil is provided with an adsorption net, and the end of the spiral coil is provided with a ceramic filter membrane, and the spiral coil is connected to There are backwash inlet pipes and backwash outlet pipes.

Preferably, a liquid outlet is provided at the lower end of the ceramic membrane filter.

Preferably, the negative pressure nozzle is tapered, and the ratio of the inner diameter of the opening to the inner diameter of the bottom is 1:5.

Preferably, the ceramic filter membrane is a silica ceramic filter membrane.

Preferably, a communication connection is provided between the touch controller and the first liquid suction pump, the second liquid suction, and the electronically controlled on-off valve.

Preferably, sealing grooves are provided on both sides of the first membrane module, the second membrane module and the third membrane module.

Preferably, the filtration precision of the first membrane module, the second membrane module and the third membrane module increases sequentially from the liquid inlet end to the liquid outlet end.

Preferably, the chip of the touch controller adopts a single-chip microcomputer.

Preferably, the liquid outlet is provided with a valve.

The present invention has the following beneficial effects:

The sewage treatment effect is good, the function of automatic collection and reuse of the reflux liquid is realized, the impurity filtration rate is improved, the maintenance time is shortened, and the service life is long.

Description of drawings

Fig. 1 is a schematic structural view of a sewage treatment device using membrane technology according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the first membrane module, the second membrane module and the third membrane module in Fig. 1 .

Detailed ways

In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

As shown in Figure 1-2, the embodiment of the present invention provides a sewage treatment device using membrane technology, including a housing 1 and a touch controller 2, one end of the housing 1 is provided with a liquid inlet pipe 4, and the liquid inlet pipe 4 is set There is a first liquid suction pump 6, a first membrane module 16, a second membrane module 17 and a third membrane module 18 are arranged in series in the casing 1, and a return pipe 8 is arranged on the front side of each membrane module 7, and on the return pipe 8 An electronically controlled switch valve 9 is set, a second liquid suction pump 10 is set on the return pipe 8, and pressure sensors 12 and negative pressure nozzles are set on the water inlet sides of the first membrane module 16, the second membrane module 17 and the third membrane module 18 20. The negative pressure suction nozzle 20 is connected to the telescopic rod 19. The first membrane assembly 16, the second membrane assembly 17 and the third membrane assembly 18 all include a support plate 22 composed of a hollow cylindrical support body 21. On the side of the support plate 22 The film 23 covered, and the edge of the film 23 is provided with a sealing pressure ring 24, and the negative pressure nozzle 20 is arranged close to the film 23; the film 23 is composed of the following raw materials in parts by mass:

20-30 parts of polyvinylidene fluoride, 20-30 parts of polysulfoneamide, 3-9 parts of vinylpyrrolidone, 6-12 parts of polyacrylonitrile, 5-20 parts of polyethylene glycol, 0.08-0.52 parts of carbon nanotubes;

The other end of the casing 1 is connected to a ceramic membrane filter 3 through a pipeline, and the ceramic membrane filter 3 is provided with a spiral coil 5, the inner wall of the spiral coil 5 is provided with an adsorption net 13, and the end of the spiral coil 5 is provided with a ceramic filter membrane 15. The spiral coil pipe 5 is connected with a backwash water inlet pipe 11 and a backwash water outlet pipe 14 .

The lower end of the ceramic membrane filter 3 is provided with a liquid outlet 11 .

The negative pressure suction nozzle 7 is conical, and the ratio of the inner diameter of the opening to the inner diameter of the bottom is 1:5.

The ceramic filter membrane 11 is a silicon dioxide ceramic filter membrane.

A communication connection is set between the touch controller 2 and the first liquid suction pump 6, the second liquid suction 10 and the electric control switch valve 9.

The two sides of the first membrane module 16, the second membrane module 17 and the third membrane module 18 are provided with sealing grooves.

The filtration accuracy of the first membrane module 16 , the second membrane module 17 and the third membrane module 18 increases sequentially from the liquid inlet end to the liquid outlet end.

The chip of the touch controller 2 adopts a single-chip microcomputer.

The liquid outlet 11 is provided with a valve.

The membrane used in this specific implementation has high strength, good hydrophilicity, and high porosity, which reduces the resistance of the membrane and improves the water flux. Three membrane modules with different filtration precisions are designed. Through the first The liquid suction pump draws the liquid medicine into the shell for step-by-step filtration. There is a return pipe in front of each membrane module, and the return pipe is equipped with an electric control switch valve and a second liquid suction pump. Through the control of the touch controller, the return liquid that has not passed through the membrane module enters the liquid storage tank through the return pipe for two separation. Since each return pipe is provided with an electronically controlled on-off valve, the individual control of the opening and closing states of different return pipes can be realized. The membrane module is installed in the sealed card slot, which can be installed and disassembled according to actual needs, realizing the switching between multiple membrane modules working in series at the same time and a single membrane module working alone. There is a pressure sensor in front of each membrane module, which can transmit the pressure of the liquid medicine back to the touch controller for monitoring in real time. The touch controller automatically adjusts the speed of the first pumping pump according to the obtained data to prevent damage to the membrane module due to excessive pressure. , with the accumulation of impurities, the passability of the filter gradually deteriorates, which gradually increases the pressure on the water inlet side of the filter in the gravel filter. When the pressure sensor detects that the pressure exceeds the limit value, the negative pressure is turned on. suction nozzle, and clean up the impurities attached to the filter through the up and down expansion and contraction of the telescopic rod. At the same time, close the shut-off valve, and use the recoil pipe to backwash and clean the impurities adsorbed on the adsorption net and the ceramic filter membrane. Both modules are cleaned simultaneously, saving maintenance time.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (9)

1. apply the waste disposal plant of membrane technique for one kind, it is characterized in that, comprise shell (1) and touch controller (2), one end of shell (1) is provided with liquid-inlet pipe (4), liquid-inlet pipe (4) is provided with the first liquid absorbing pump (6), the first membrane module (16) has been arranged in series in shell (1), second membrane module (17) and tertiary membrane assembly (18), the front side of each membrane module (7) arranges a return line (8), return line (8) is arranged electric-controlled switch valve (9), return line (8) is arranged the second liquid absorbing pump (10), first membrane module (16), the influent side of the second membrane module (17) and tertiary membrane assembly (18) is provided with pressure transmitter (12) and negative pressure suction nozzle (20), negative pressure suction nozzle (20) is connected on expansion link (19), first membrane module (16), second membrane module (17) and tertiary membrane assembly (18) include and form back up pad (22) by hollow cylinder supporter (21), the film (23) covered in back up pad (22) side, and the edge of film (23) is provided with seal joint (24), negative pressure suction nozzle (20) is close to film (23) and is arranged, film (23) is made up of the raw material of following masses number:

Polyvinylidene difluoride (PVDF) 20-30 part, polysulfonamides gather 20-30, V-Pyrol RC 3-9 part, polyacrylonitrile 6-12 part, polyoxyethylene glycol 5-20 part, carbon nanotube 0.08-0.52 part;

The other end of shell (1) is connected with purpose ceramic-film filter (3) by pipeline, spiral pipe (5) is provided with in purpose ceramic-film filter (3), spiral pipe (5) inwall is provided with adsorption net (13), the end of spiral pipe (5) is provided with ceramic filter membrane (15), spiral pipe (5) is connected with backwash water inlet pipe (11) and backwash rising pipe (14).

2. a kind of waste disposal plant applying membrane technique according to claim 1, is characterized in that, described purpose ceramic-film filter (3) lower end is provided with liquid outlet (11).

3. a kind of waste disposal plant applying membrane technique according to claim 1, is characterized in that, described negative pressure suction nozzle (7) is taper, and the internal diameter of opening part is 1: 5 with the ratio of the internal diameter of bottom.

4. a kind of waste disposal plant applying membrane technique according to claim 1, is characterized in that, described ceramic filter membrane (11) adopts SiO 2-ceramic filtering membrane.

5. a kind of waste disposal plant applying membrane technique according to claim 1, it is characterized in that, described touch controller (2) and described first liquid absorbing pump (6), between the second drawing liquid (10) and electric-controlled switch valve (9), communication is set is connected.

6. a kind of waste disposal plant applying membrane technique according to claim 1, is characterized in that, described first membrane module (16), the second membrane module (17) and tertiary membrane assembly (18) both sides are provided with sealing draw-in groove.

7. a kind of waste disposal plant applying membrane technique according to claim 1, it is characterized in that, described first membrane module (16), the second membrane module (17) and tertiary membrane assembly (18) filtering accuracy increase successively from liquid feeding end to outlet end.

8. a kind of waste disposal plant applying membrane technique according to claim 1, is characterized in that, the chip of described touch controller (2) adopts micro-chip.

9. a kind of waste disposal plant applying membrane technique according to claim 1, is characterized in that, described liquid outlet (11) is provided with valve.