Sponge water treatment system

Abstract

According to the sponge water treatment system, modified polyurethane sponge is used as a water treatment material, and sewage treatment is carried out through the steps of water absorption, slag removal, extrusion and the like. The method has the characteristics of simplicity and high efficiency, and is suitable for high-concentration SS and organic matter sewage treatment.

Description

Technical Field

[0001] The present invention belongs to the field of sewage treatment, and specifically relates to a highly hydrophilic polyurethane sponge filtration device and method. Background Art

[0002] Polyurethane filtration sponge is a filter cotton with a microporous structure made of polyurethane modified materials, which has the characteristics of high filtration efficiency, water resistance, corrosion resistance and long service life. Referring to the patent document "A Highly Hydrophilic Polyurethane Filter Cotton and Its Preparation Method" (202411265136.5), it is therefore commonly used in fields such as air purification, water treatment, food processing and pharmaceutical manufacturing.

[0003] However, there are several problems that need to be solved urgently in the sewage treatment with sponges.

[0004] Firstly, along with the sedimentation of a large number of suspended solids in the sewage treatment process, impurities tend to accumulate on the surface of the filter cotton and in the water filtration channels, resulting in a decrease in the transmittance, so that frequent backwashing is required. Secondly, the filtration power comes from the hydraulic pressure difference, and the sewage treatment capacity of the filter cotton for high-concentration hydrophilic impurities drops rapidly, the transmittance decreases significantly, and the filtration power is insufficient.

[0005] In fact, the above two factors often act together. As the filtration progresses, the sewage concentration becomes higher and higher, greatly reducing the efficiency of the filtration sponge, thus limiting the application range of the polyurethane filter cotton.

[0006] Therefore, how to improve the usage method of the filtration sponge, enhance the efficiency of the filtration device, and expand its application fields is an urgent problem to be solved. Summary of the Invention

[0007] The present invention provides an efficient sponge water purification system. Using the modified hydrophilic polyurethane sponge as the filtration sponge, the water purification operation is completed through a series of cyclic processes of water absorption, filtration, slag scraping and extrusion. The main removal objects are suspended solids (SS) in the sewage, including colloids, macromolecules, etc.

[0008] Utilizing the high elasticity and high water absorption characteristics of the polyurethane sponge, the water absorption - extrusion cycle is realized to improve the filtration power for the removal of suspended solids and the recovery of treated water.

[0009] In view of the characteristic that SS accumulates on the surface of the sponge, a slag scraping device is designed to synchronously collect the filter residue and empty the filtration channel, extending the backwashing cycle.

[0010] In order to achieve the above object, the present invention provides the following technical solutions: A sponge water treatment system, comprising: a water inlet tank, a filter sponge, a motor, a conveyor belt, an inner support, a column, a driving wheel, a slag scraping plate, a slag discharge tank, a drainage plate, drainage holes, and a drainage groove. The filter sponge adheres to the conveyor belt. The filter sponge is a hydrophilic modified polyurethane sponge, which is composed of the following raw materials: 20-30 parts of polyether polyol, 5-8 parts of modified cellulose, 5-15 parts of diisocyanate, 0.1-0.3 parts of catalyst, 0.5-1 part of silicone foam stabilizer, and 1-3 parts of water. The modified cellulose is prepared by modifying cellulose with 1,3-bis(chloromethyl)tetramethyldisiloxane and triethylene glycol monotosylate. The porosity of the filter sponge is not less than 60%.

[0011] The filter sponge is in close contact with the conveyor belt. The conveyor belt is fixed on the driving wheel, and the motor drives the driving wheel and the conveyor belt to move. When the motor is started, the sponge is immersed in water. The sponge filled with treated water moves in a cycle with the conveyor belt, and the filtered out SS and organic impurities adhere to the surface layer of the filter sponge as filter residues. On the back of the system, the conveyor belt is in close contact with the inner support. The filter sponge is first contacted by the adjustable slag scraping plate for slag scraping treatment on the surface layer, and then is extruded by the adjustable drainage plate to drain the treated water, and the treated water enters the drainage groove. Under the combined extrusion of the lower drainage plate and the inner support, the sponge enters the water inlet tank again. At the end of the lower drainage plate, the external pressure of the sponge disappears, and the volume rebounds, and it is filled with the water to be treated again, completing a treatment cycle. The runner can move forward and backward, and the speed is 1-5 m / min.

[0012] The main body of the system is inclined at an angle of 60°-75° and placed in the water inlet tank. The distance between the slag scraping plate and the filter sponge is adjustable to ensure the slag scraping thickness. The distance between the drainage plate and the conveyor belt is adjustable to control the drainage volume.

[0013] Backwashing mode: The treatment water tank is a clean water source, and the drive system runs in reverse to complete one or more than one treatment process.

[0014] The filter sponge is in close contact with the conveyor belt. The conveyor belt is fixed on the driving wheel, and the motor drives the driving wheel and the conveyor belt to rotate. The filter sponge absorbs the sewage in the water inlet tank at the lowest point. After leaving the water surface, it contacts the slag scraping plate at a higher position to remove the impurities deposited on the surface. Behind, it is extruded by the extrusion plate to drain the treated water, completing a treatment process.

[0015] The filter sponge is 0.20-0.5 m thick, 1 m wide, and 1-2 m long. Multiple filter sponges are pasted on the conveyor belt. Beneficial effects

[0016] The effluent is stable, the treated water volume is guaranteed, and the influent concentration is stable. The backwashing operation is reduced, and the treatment efficiency is improved. It has little influence on high-concentration sewage and hydrophilic impurities.

[0017] The disadvantages are: when treating high concentrations, the effluent SS is relatively high, and the slag scraping operation is strengthened. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a front schematic structural diagram of the present invention; Figure 3 It is a back schematic structural diagram of the present invention; In the figure: 1 water inlet tank, 2 motor, 3 filter sponge, 4 transmission belt, 5 transmission wheel, 6 column, 7 inner support, 8 slag scraping plate, 9 slag discharge trough, 10 upper drainage plate, 11 drainage hole, 12 drainage trough, 13 lower drainage plate, 14 lower transmission wheel Embodiment 1

[0019] A sponge water treatment system includes: a water inlet tank, a filter sponge, a motor, a transmission belt, an inner support, a column, a transmission wheel, a slag scraping plate, a drainage plate, a drainage hole, a drainage trough, and a slag discharge trough. The filter sponge adheres to the transmission belt; The filter sponge is a hydrophilic modified polyurethane sponge and is composed of the following raw materials: 20 parts of polyether polyol, 6 parts of modified cellulose, 8 parts of diisocyanate, 0.2 part of catalyst, 0.5 part of silicone foam stabilizer, and 1 part of water; the modified cellulose is prepared by modifying cellulose with 1,3-bis(chloromethyl)tetramethyldisiloxane and triethylene glycol monotosylate.

[0020] The filter sponge is in close contact with the transmission belt. The transmission belt is fixed on the transmission wheel. The motor drives the transmission wheel and the transmission belt to rotate. The runner can move forward and backward, and the speed is 1 - 5 m / min. When the motor is started, the filter sponge is immersed in water. The filter sponge full of treated water moves in a cycle with the transmission belt. On the back of the system, it is first contacted by the adjustable slag scraping plate for slag scraping treatment, and then is squeezed by the adjustable drainage plate to discharge the treated water. The treated water enters the drainage trough; under the combined action of the lower drainage plate and the inner support, the filter sponge enters the water inlet tank again. At the end of the lower drainage plate, the external pressure of the filter sponge disappears, its volume rebounds, and it is full of sewage again, completing a treatment cycle. The filter sponge is 0.25 m thick, 0.8 m wide, and 1 m long. 4 filter sponges are pasted on the transmission belt.

[0021] The control distance between the lower drainage plate and the transmission belt is 0.15 m.

[0022] Backwashing mode: The treatment water tank is a clean water source, and the transmission system runs in reverse to complete one or more than one treatment process.

[0023] The filtering sponge is in close contact with the conveyor belt, which is fixed on the driving wheel. The motor drives the driving wheel and the conveyor belt to rotate. The sponge can absorb the sewage in the water tank at the lowest point. After leaving the water surface, it contacts the slag scraping plate at a higher position to remove the impurities precipitated on the surface. Then it is squeezed by the squeezing plate to discharge the treated water, completing a treatment process. The advantages of this system are that the influent concentration will not increase significantly, the treated water is constant, and the treatment efficiency is controllable. Example 2

[0024] A sponge water treatment system includes: a water inlet tank, a filtering sponge, a motor, a conveyor belt, an inner support, a column, a driving wheel, a slag scraping plate, a drainage plate, drainage holes, a slag discharge tank, and a drainage tank. The filtering sponge adheres to the conveyor belt. The filtering sponge is a hydrophilic modified polyurethane sponge, which is composed of the following raw materials: 30 parts of polyether polyol, 6 parts of modified cellulose, 6 parts of diisocyanate, 0.3 part of catalyst, 0.6 part of silicone foam stabilizer, and 2 parts of water. The modified cellulose is prepared by modifying cellulose with 1,3-bis(chloromethyl)tetramethyldisiloxane and triethylene glycol monotosylate.

[0025] The filtering sponge is in close contact with the conveyor belt, which is fixed on the driving wheel. The motor drives the driving wheel and the conveyor belt to rotate. When the motor is started, the filtering sponge is immersed in water. The sponge filled with treated water moves in a cycle with the conveyor belt. At the back of the system, it is first contacted by the adjustable slag scraping plate for slag scraping treatment, and then squeezed by the adjustable drainage plate to discharge the treated water. The treated water enters the drainage tank. Under the combined action of the lower drainage plate and the inner support, the filtering sponge re-enters the water inlet tank. At the end of the lower drainage plate, the external pressure of the sponge disappears, and its volume rebounds, and it is filled with sewage again, completing a treatment cycle.

[0026] The filtering sponge is 0.3 m thick, 0.8 m wide, and 1 m long. Four filtering sponges are pasted on the conveyor belt.

[0027] The distance between the lower drainage plate and the inner support is controlled at 0.2 m.

[0028] Backwashing mode: The treatment water tank is a clean water source, and the drive system runs in reverse to complete one or more treatment processes.

[0029] The filtering sponge is in close contact with the conveyor belt, which is fixed on the driving wheel. The motor drives the driving wheel and the conveyor belt to rotate. The sponge can absorb the sewage in the water inlet tank at the lowest point. After leaving the water surface, it contacts the slag scraping plate at a higher position to remove the impurities precipitated on the surface. Then it is squeezed by the squeezing plate to discharge the treated water, completing a treatment process. The advantages of this system are that the filter residue is removed in time, the backwashing cycle is long, and the effluent is stable.

Claims

1. A sponge water treatment system, characterized in that: Said include: Water inlet tank, filter sponge, motor, transmission belt, inner support, column, transmission wheel, scraper plate, slag discharge trough, drain plate, drain hole, drain trough; The filter sponge adheres to the transmission belt; the motor is started, and the filter sponge immersed in the water absorbs the sewage to be treated; the filter sponge moves cyclically with the transmission belt, and at the back of the system, the surface of the filter sponge is contacted by the adjustable scraper plate, and the scraper is processed, and then it is squeezed by the adjustable drain plate to discharge the treated water, and the treated water enters the drainage trough; under the squeezing action of the lower drain plate and the inner support, the filter sponge enters the water inlet tank again, and at the end of the lower drain plate, in the water inlet tank, the external pressure of the filter sponge disappears, the volume rebounds, and it absorbs the sewage again, completing a treatment cycle; Backwash mode: The treatment tank is the clean water source, and the transmission system runs in reverse to complete one or more treatment processes.

2. A sponge water treatment system according to claim 1, characterized in that: The filter sponge is a hydrophilic modified polyurethane sponge, which is composed of the following raw materials: 5 to 8 parts of modified cellulose, 20 to 30 parts of polyether polyol, 5 to 15 parts of diisocyanate, 0.1 to 0.3 parts of catalyst, 0.5 to 1 parts of silicone foam stabilizer and 1 to 3 parts of water; the modified cellulose is prepared by modifying cellulose with 1,3-bis(chloromethyl)tetramethyldisiloxane and triethylene glycol mono-p-toluenesulfonate.

3. A sponge water treatment system according to claim 1, characterized in that: The porosity of the filter sponge is not less than 60%.

4. A sponge water treatment system according to claim 1, characterized in that: The rotating wheel can move forward and reversely at a speed of 1 to 5 m / min.

5. The sponge water treatment system according to claim 1, characterized in that: The system body is placed in the water inlet tank at an angle of 60° to 75°.

6. A sponge water treatment system according to claim 1, characterized in that: The scraping plate can be adjusted in height to ensure the scraping thickness.

7. A sponge water treatment system according to claim 1, characterized in that: The drainage board is height-adjustable to control the drainage volume.

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