Multi-stage wastewater filtration device

Abstract

The utility model relates to wastewater multistage filtering device, including the first filtering component for carrying out primary filtration to wastewater, the right -hand member of first filtering component is equipped with the second filtering component for carrying out fine filtration to wastewater, the right -hand member of second filtering component is equipped with the heat exchange component for carrying out waste heat recycling to the wastewater after filtering, first filtering component, second filtering component and heat exchange component intercommunication between them. The utility model discloses through first filtering component can carry out primary filtration and middle filtration to wastewater, through setting up second filtering component, can carry out fine filtration to the bathing wastewater after filtering through first filtering component with quartz sand filter material etc, thereby realizes multistage filtration to wastewater, and the filtering effect is better than traditional device, and through setting up heat exchange component, can make full use of the waste heat in bathing wastewater, can realize the secondary use to waste heat, thereby avoid causing the waste of heat in bathing wastewater, more energy -conserving environmental protection.

Description

Technical Field

[0001] This utility model relates to a wastewater filtration device, specifically a multi-stage wastewater filtration device. Background Technology

[0002] In industrial production and public facility operation, wastewater treatment and heat recovery are crucial links in resource recycling. Taking employee bathing systems as an example, wastewater not only contains pollutants such as suspended solids and impurities, but may also carry a large amount of waste heat. Traditional treatment methods often separate filtration from heat recovery, leading to resource waste and low efficiency. The discharged wastewater may still contain a lot of harmful substances and may also carry a large amount of waste heat. Wastewater filtration devices are equipment used to remove suspended solids, particulate matter, colloids, microorganisms or other pollutants from wastewater, playing a vital role in the field of wastewater recycling.

[0003] In existing technologies, wastewater filtration devices typically use filter screens to simply filter impurities and particulate matter in bath wastewater before discharging the wastewater. This method has low filtration accuracy, and the discharged wastewater is still prone to causing environmental pollution. Furthermore, the large amount of residual heat in the wastewater is easily wasted. Utility Model Content

[0004] The technical problem to be solved by this utility model is that existing wastewater filtration devices usually have low filtration accuracy and are prone to waste of waste heat.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a multi-stage wastewater filtration device, including a first filter component for preliminary filtration of wastewater, a second filter component for fine filtration of wastewater at the right end of the first filter component, and a heat exchange component for waste heat recovery and utilization of the filtered wastewater at the right end of the second filter component, wherein the first filter component, the second filter component and the heat exchange component are interconnected.

[0006] The beneficial effects of this invention are: by setting up a first filter component and a second filter component to perform multi-stage filtration of bathing wastewater, the filtration effect is better; and by setting up a heat exchange component, the waste heat in the bathing wastewater can be fully utilized, realizing the secondary utilization of waste heat. Therefore, this invention has the advantages of good filtration effect and avoids the waste of waste heat in bathing wastewater.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the first filter assembly includes a housing, a grid plate, and a screen. The grid plate is fixedly installed in the middle of the inner side of the housing, and the screen is embedded in the right end of the housing near the bottom. The housing is connected to the second filter assembly through the screen.

[0009] Furthermore, the upper end of the box is provided with a box cover, and a sewage inlet pipe is fixedly installed on the upper end of the box cover.

[0010] Furthermore, a door is provided at the lower front end of the box, and first support posts are fixedly installed around the four corners of the lower end of the box.

[0011] Furthermore, the second filter assembly includes a tank, a guide pipe installed on the side of the tank, a feed pipe installed on the upper end of the tank, and a discharge pipe installed on the bottom of the tank. A hydraulic controller is provided on the outside of the guide pipe.

[0012] Furthermore, both the feed pipe and the discharge pipe are equipped with sealing caps on their outer sides, and three sets of second support columns are evenly and fixedly installed around the lower end of the tank.

[0013] Furthermore, the heat exchange assembly includes a heat exchanger, a connecting pipe installed at the left end of the heat exchanger, a drain pipe installed at the upper end of the heat exchanger, a water inlet pipe installed at the front end of the heat exchanger, and a drain pipe installed at the right end of the heat exchanger.

[0014] Furthermore, two sets of support blocks are symmetrically arranged and fixedly installed at the lower end of the heat exchanger, and the lower ends of the two sets of support blocks are fixedly installed on the base.

[0015] The beneficial effects of adopting the above-mentioned further scheme are as follows: by using a bar screen, a sieve, and quartz sand filter media to filter bath wastewater in sequence, primary filtration, secondary filtration, and fine filtration can be achieved, thereby realizing multi-stage filtration of wastewater and improving the filtration effect. Furthermore, by setting up a heat exchanger, the residual heat in the wastewater can be reused to heat the cooling water, thus avoiding the waste of heat in the bath wastewater and making it more economical and environmentally friendly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0017] Figure 2 This is a schematic diagram of the present invention from another angle;

[0018] Figure 3 This is a schematic diagram of the first filter component of this utility model;

[0019] Figure 4 This is a schematic diagram of the grating plate of this utility model;

[0020] Figure 5 This is a schematic diagram of the second filter component of this utility model;

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1. First filter assembly; 2. Second filter assembly; 3. Heat exchange assembly; 101. Housing; 102. Grating plate; 103. Screen; 104. Housing cover; 105. Inlet pipe; 106. Housing door; 107. First support column; 201. Tank; 202. Guide pipe; 203. Hydraulic controller; 204. Feed pipe; 205. Discharge pipe; 206. Sealing cover; 207. Second support column; 301. Heat exchanger; 302. Connecting pipe; 303. Drain pipe; 304. Water inlet pipe; 305. Drain pipe; 306. Support block; 307. Base. Detailed Implementation

[0023] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0024] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0025] like Figure 1-5 As shown, the multi-stage wastewater filtration device includes a first filter component 1 for preliminary filtration of wastewater, a second filter component 2 for fine filtration of wastewater at the right end of the first filter component 1, and a heat exchange component 3 for waste heat recovery and utilization of the filtered wastewater at the right end of the second filter component 2. The first filter component 1, the second filter component 2 and the heat exchange component 3 are interconnected.

[0026] like Figures 3-4As shown, the first filter assembly 1 includes a housing 101, a grid plate 102, and a screen 103. The grid plate 102 is fixedly installed in the middle of the inner side of the housing 101. The screen 103 is embedded in the right end of the housing 101 near the bottom. The housing 101 communicates with the second filter assembly 2 through the screen 103. The upper end of the housing 101 is provided with a cover 104. A sewage inlet pipe 105 is fixedly installed on the upper end of the cover 104. The lower front end of the housing 101 is provided with a door 106. The lower four corners of the lower end of the housing 101 are fixedly surrounded by first support posts 107. By setting the first filter assembly 1 (grid plate 102... The screen 103 achieves coarse filtration, intercepting large suspended particles (such as fibers and silt). The screen 103 adopts a 30° inclined embedded design, which can avoid the accumulation and blockage of impurities and reduce the frequency of manual cleaning. A quick-opening door 106 is provided at the front end of the box 101 to facilitate the cleaning of the screen intercepted material. The feed pipe 204 and discharge pipe 205 of the tank 201 are equipped with flange-type sealing covers 206 to support quick replacement of filter media, making it more convenient and faster.

[0027] like Figure 5 As shown, the second filter assembly 2 includes a tank 201, a guide pipe 202 installed on the side of the tank 201, an inlet pipe 204 installed at the upper end of the tank 201, and a discharge pipe 205 installed at the bottom of the tank 201. A hydraulic controller 203 is provided on the outside of the guide pipe 202. Sealing caps 206 are provided on the outside of both the inlet pipe 204 and the discharge pipe 205. Three sets of second support columns 207 are evenly and fixedly installed around the lower end of the tank 201. The heat exchange assembly 3... The heat exchanger includes a heat exchanger 301, a connecting pipe 302 installed at the left end of the heat exchanger 301, a drain pipe 303 installed at the upper end of the heat exchanger 301, a water inlet pipe 304 installed at the front end of the heat exchanger 301, and a drain pipe 305 installed at the right end of the heat exchanger 301. Two sets of support blocks 306 are symmetrically arranged and fixedly installed at the lower end of the heat exchanger 301. The lower ends of the two sets of support blocks 306 are fixedly installed on a base 307. The model of the heat exchanger 301 is WZP-231. Pt100 uses a pressure sand filter tank 201 for fine filtration. The tank is filled with a double layer of quartz sand and activated carbon filter media, which can effectively adsorb colloids, microorganisms and organic matter, resulting in low turbidity of the effluent. This ensures that the discharged bath wastewater will not pollute the environment. By setting up a heat exchange component 3, the heat exchanger 301 is directly connected to the outlet of the second filter component 2. The cleanliness of the filtered wastewater (low impurity content) improves the heat exchange efficiency and the heat recovery rate is higher.

[0028] Working principle: First, the wastewater is filtered in stages. The wastewater enters the first filter component 1 through the inlet pipe 105 and passes through the grid plate 102 (grid gap 10mm) to intercept large-sized debris (such as hair and plastic fragments).

[0029] Then, the wastewater after initial filtration flows along the bottom of the tank 101 and is subjected to secondary interception of fine particles (such as sand, gravel, and metal shavings) by the screen 103 (1mm aperture).

[0030] Next, the wastewater enters the second filter component 2 through the screen 103, and is evenly distributed in the tank 201 through the guide pipe 202. It penetrates the quartz sand filter material layer from top to bottom, deeply adsorbing colloids, organic matter and color.

[0031] Afterwards, waste heat is recovered and utilized. The clean wastewater after fine filtration is transported to the left end connecting pipe 302 of heat exchanger 301 through guide pipe 202. Cold water is injected into heat exchanger 301 through inlet pipe 304 and exchanges heat with wastewater in a countercurrent manner. The wastewater temperature drops from 40℃ to 19℃ (such as coal mine cooling water), and the cold water temperature rises from 12℃ to 25℃ (such as bathroom tap water).

[0032] The cooled wastewater is discharged through drain pipe 305 or enters subsequent treatment; the heated cold water is transported to the water storage tank for production or domestic use.

[0033] During the use of the device, the cover 104 and door 106 are opened periodically to clean the filtered particles, and the quartz sand filter media in the tank 201 is replaced periodically through the feed pipe 204 and discharge pipe 205.

[0034] Material optimization description

[0035] Corrosion resistance:

[0036] The box body 101 and tank body 201 are made of 304 stainless steel (thickness ≥ 3mm), and the screen 103 is 316L stainless steel woven mesh.

[0037] The heat exchanger plates 301 are made of titanium alloy (Gr1), which is resistant to corrosion from acidic wastewater.

[0038] Sealing performance:

[0039] The flange connection between the cover 104 and the tank body 201 uses an EPDM rubber sealing ring with a temperature resistance range of -40℃ to 150℃.

[0040] The 202 connector of the drain tube uses a polytetrafluoroethylene (PTFE) gasket to prevent leakage.

[0041] Structural reinforcement:

[0042] The bottom of the first support column 107 and the second support column 207 are equipped with shock-absorbing rubber pads (Shore hardness 70HA) to reduce equipment vibration and noise.

[0043] Supplementary Explanation

[0044] Flow guide pipe 202 design: The internal spiral guide vane is added to avoid water flow short circuit and improve the utilization rate of filter media;

[0045] Heat exchange component 3 layout: A heat insulation layer (ceramic fiber felt) is set between the support block 306 and the base 307 to reduce heat loss;

[0046] Automation control: The system integrates a PLC (Siemens S7-1200) and automatically adjusts the filtration-heat exchange process through sensor data to achieve unattended operation.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage wastewater filtration device, characterized in that: The system includes a first filter assembly (1) for preliminary filtration of wastewater, a second filter assembly (2) for placing quartz sand filter media for fine filtration of wastewater at the right end of the first filter assembly (1), and a heat exchange assembly (3) for recovering waste heat from the filtered wastewater at the right end of the second filter assembly (2). The first filter assembly (1), the second filter assembly (2) and the heat exchange assembly (3) are interconnected.

2. The multi-stage wastewater filtration device according to claim 1, characterized in that, The first filter assembly (1) includes a housing (101), a grid plate (102), and a screen (103). The grid plate (102) is fixedly installed in the middle of the inner side of the housing (101). The screen (103) is embedded in the right end of the housing (101) near the bottom. The housing (101) is connected to the second filter assembly (2) through the screen (103).

3. The multi-stage wastewater filtration device according to claim 2, characterized in that, The upper end of the box body (101) is provided with a box cover (104), and a sewage inlet pipe (105) is fixedly installed on the upper end of the box cover (104).

4. The multi-stage wastewater filtration device according to claim 2, characterized in that, The lower front end of the box (101) is provided with a box door (106), and the four corners of the lower end of the box (101) are fixedly installed with first foot posts (107).

5. The multi-stage wastewater filtration device according to claim 1, characterized in that, The second filter assembly (2) includes a tank (201), a guide pipe (202) installed on the side of the tank (201), a feed pipe (204) installed on the upper end of the tank (201), and a discharge pipe (205) installed on the bottom of the tank (201). A hydraulic controller (203) is provided on the outside of the guide pipe (202).

6. The multi-stage wastewater filtration device according to claim 5, characterized in that, The outer sides of the feed pipe (204) and the discharge pipe (205) are both provided with sealing caps (206), and three sets of second feet (207) are evenly and fixedly installed around the lower end of the tank body (201).

7. The multi-stage wastewater filtration device according to claim 1, characterized in that, The heat exchange assembly (3) includes a heat exchanger (301), a connecting pipe (302) installed at the left end of the heat exchanger (301), a drain pipe (303) installed at the upper end of the heat exchanger (301), a water inlet pipe (304) installed at the front end of the heat exchanger (301), and a drain pipe (305) installed at the right end of the heat exchanger (301).

8. The multi-stage wastewater filtration device according to claim 7, characterized in that, The lower end of the heat exchanger (301) is symmetrically provided with two sets of support blocks (306), and the lower ends of the two sets of support blocks (306) are fixedly installed on the base (307).

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