Vehicle-mounted small sewage treatment equipment

Abstract

This invention relates to the field of wastewater treatment equipment technology, specifically to a vehicle-mounted small wastewater treatment device. It relies on a spiral rotation to scrape away dirt adhering to the walls of the screen barrel, achieving self-cleaning of the screen barrel. A pressure relief chamber is set in the upper spiral working area of ​​the screen barrel, with the gap between the spiral blades and the inner wall of the screen barrel increased to 50mm. Wrapped and stuck cloth strips, paper scraps, and other debris are depressurized and fall off under their own weight in the chamber, completing the self-release of stuck debris. Through a double-layer interception of microporous filtration in the perforated screen barrel and a secondary filtration box, solid impurities are prevented from entering the sewage pump and causing blockage. Simultaneously, a double protection structure is adopted, using a level gauge linked to an electromagnetic valve for pressure relief and adding a steam-water separator to the suction pipeline, completely eliminating the risk of sewage backflow damaging the vacuum pump. This solves the technical problems of existing drum filter equipment being prone to clogging, traditional wastewater treatment equipment being too large and heavy to be compatible with blue-plate sewage suction trucks, spiral equipment being prone to debris jamming, and sewage pumps and vacuum pumps being easily damaged.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, and in particular to a vehicle-mounted small wastewater treatment device. Background Technology

[0002] Currently, septic tanks and industrial wastewater pretreatment commonly use drum-type stainless steel filters for dry-wet separation, relying on the centrifugal force generated by the rotation of the drum to separate wastewater from solid debris. Existing drum filter structures have significant technical defects: 1. Significant clogging problem: Cloth strips, paper scraps, sludge and other debris in the septic tank easily clog the drum drain holes, and the filter screen pore size limits the separation effect, resulting in a high moisture content in the separated solid sludge; 2. Poor adaptability to different scenarios: Existing complete sets of sewage treatment equipment are large in size and weight, and can only be used with large yellow-plate vacuum trucks, but not with small blue-plate vacuum trucks; in addition, traditional equipment requires structural modification of septic tanks, and is not suitable for on-site treatment of septic tanks in old residential areas. 3. Spiral extrusion solid-liquid separation equipment is prone to slag jamming: cloth strips and thick paper scraps can easily get stuck in the gap between the spiral blades and the screen barrel, causing the equipment to stop or jam. 4. The rear pump body is easily damaged: a single filtration cannot completely intercept fine solids, and impurities enter the sewage pump, causing the pump body to become blocked; sewage can easily backflow into the vacuum pump along the vacuum pipeline, corroding the internal structure of the vacuum pump, greatly increasing equipment maintenance costs and reducing operating efficiency.

[0003] Therefore, the market urgently needs a lightweight, vehicle-mountable, self-cleaning, automatic sludge release, anti-pumping, and anti-sewage backflow small vehicle-mounted sewage treatment equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a vehicle-mounted small-scale sewage treatment equipment that solves the technical problems of existing drum filter equipment being prone to clogging, traditional sewage treatment equipment being too large and heavy to be compatible with blue-plate vacuum trucks, spiral equipment being prone to slag jamming, and sewage pumps and vacuum pumps being prone to damage.

[0005] To achieve the above objectives, this invention provides a vehicle-mounted small-scale sewage treatment equipment, comprising a chamber, a suction pipe, a sludge removal port, a perforated screen, spiral blades, a pressure relief chamber, a spiral reducer, a secondary filter box, a gas-water separator, an electromagnetic valve, a level gauge, and a vacuum gauge; the overall length is less than 2m, the overall height is less than 1.3m, and the overall weight is less than 0.5 tons, suitable for installation on a blue-plate sewage suction truck; the spiral blades are coaxially mounted inside the perforated screen, with a 1mm gap between the outer wall of the spiral blades and the inner wall of the perforated screen during normal operation; a pressure relief chamber is provided at the top of the perforated screen, with a 50mm gap between the spiral blades inside the pressure relief chamber and the inner wall of the perforated screen; the lower part of the perforated screen is connected to the secondary filter box to form a double-layer filtration structure; the vacuum suction pipe of the equipment is connected in series with the gas-water separator and the electromagnetic valve, and a level gauge is installed inside the chamber, with the signal end of the level gauge electrically connected to the electromagnetic valve; a closable sludge removal port is opened at the front of the chamber, and the spiral reducer drives the spiral blades to rotate and squeeze the sludge for dewatering.

[0006] When the spiral blades rotate continuously, their outer walls scrape against the inner wall of the perforated screen barrel and the drain holes of the screen barrel, automatically removing dirt attached to the perforated walls and achieving self-cleaning of the screen barrel.

[0007] In this process, the cloth strips, paper scraps and other debris that are entangled and stuck in the gap between the spiral blade and the perforated screen barrel enter the pressure release chamber as the spiral blade rotates. The gap in the chamber widens to release the pressure, and the stuck debris falls to the bottom of the screen barrel by its own weight and is pushed to the slag removal port by the spiral blade to be discharged, thus realizing the self-release of the stuck debris.

[0008] In this process, the wastewater first passes through the perforated screen to initially intercept large solid particles. After filtration, the wastewater flows into the secondary filter box to complete secondary fine filtration, thus doubly intercepting solid impurities and preventing them from entering the downstream sewage pump and causing blockage.

[0009] When the sewage level inside the compartment reaches a set threshold, the level gauge triggers the solenoid valve to open and release pressure. At the same time, the steam-water separator separates the liquid sewage in the separation pipeline, thus doubly preventing the sewage from flowing back into the vacuum pump along the air intake pipeline.

[0010] The spiral blades continuously compress the sludge under high pressure, causing it to dehydrate and form a solid mud cake with low moisture content. The mud cake can be directly removed by opening the cleaning port, and no sewage flows out during the cleaning operation, thus avoiding secondary pollution.

[0011] The vacuum gauge is installed on the vacuum suction pipeline to collect and display the negative pressure value of the pipeline in real time and provide real-time feedback on the equipment's sewage suction operation status.

[0012] The vehicle-mounted small-scale sewage treatment equipment of the present invention is lightweight and compact, and can be directly fixed to the cargo compartment of a blue-plate vacuum truck. It operates continuously without screen blockage, spiral slag jamming, pump blockage, or vacuum pump water ingress damage. The sludge cake after dewatering has a low moisture content, and there is no sewage leakage during sludge removal. It is suitable for mobile on-site treatment of septic tanks in old urban residential areas and domestic sewage in factories, solving the technical problems of easy clogging of existing drum filter equipment, large size and weight of traditional sewage treatment equipment that cannot be adapted to blue-plate vacuum trucks, easy slag jamming of spiral equipment, and easy damage to sewage pumps and vacuum pumps. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the overall structure of the vehicle-mounted small sewage treatment equipment according to the first embodiment of the present invention.

[0015] Figure 2 This is a top view of the vehicle-mounted small sewage treatment equipment according to the first embodiment of the present invention.

[0016] Figure 3 This is a left-side sectional view of the vehicle-mounted small sewage treatment equipment according to the first embodiment of the present invention, used to show the internal screen, spiral blades, and pressure relief chamber structure.

[0017] Figure 4 This is a right-side structural schematic diagram of the vehicle-mounted small sewage treatment equipment according to the first embodiment of the present invention, showing the assembly positions of the secondary filter box, level gauge, and reducer.

[0018] In the diagram: 1-Cover; 2-Suction pipe; 3-Slag removal port; 4-Perforated screen; 5-Spiral blade; 6-Pressure relief chamber; 7-Air-water separator; 8-Solenoid valve; 9-Spiral reducer; 10-Level gauge; 11-Vacuum gauge; 12-Secondary filter box. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0020] The first embodiment of this application is as follows: Please see Figures 1 to 4 ,in, Figure 1 This is a schematic diagram of the overall structure of the vehicle-mounted small sewage treatment equipment according to the first embodiment of the present invention. Figure 2This is a top view schematic diagram of the vehicle-mounted small sewage treatment equipment according to the first embodiment of the present invention. Figure 3 This is a left-side sectional view of the vehicle-mounted small-scale sewage treatment equipment according to the first embodiment of the present invention, used to show the internal screen tank, spiral blades, and pressure relief chamber structure. Figure 4 This is a right-side structural schematic diagram of the vehicle-mounted small sewage treatment equipment according to the first embodiment of the present invention, showing the assembly positions of the secondary filter box, level gauge, and reducer. The present invention provides a vehicle-mounted small sewage treatment equipment, including a box body 1, a suction pipe 2, a slag removal port 3, a perforated screen 4, a spiral blade 5, a pressure relief chamber 6, a spiral reducer 9, a secondary filter box 12, a gas-water separator 7, an electromagnetic valve 8, a level gauge 10, and a vacuum gauge 11. The aforementioned solution solves the technical problems of existing drum filter equipment being prone to clogging, traditional sewage treatment equipment being too large and heavy to be compatible with blue-plate vacuum trucks, spiral equipment being prone to slag jamming, and sewage pumps and vacuum pumps being easily damaged.

[0021] For this specific implementation method, the overall dimensions of the machine are: length 1.8m, height 1.1m, and weight 0.42 tons. It is suitable for installation on blue-plate vacuum trucks with a capacity of 4.5 tons or less.

[0022] Combination Figure 1 , Figure 3 The perforated screen barrel 4 is horizontally assembled inside the housing 1, and the spiral blades 5 are coaxially arranged inside the screen barrel. The spiral reducer 9 is fixed to the outer wall of the right side of the housing 1, and the reducer drives the spiral blades 5 to rotate at a uniform speed. The machining gap between the outer wall of the spiral blades 5 and the inner wall of the perforated screen barrel 4 is strictly controlled at 1mm. When the equipment is in negative pressure suction operation, sewage is sucked into the housing 1 through the suction pipe 2 and flows into the perforated screen barrel 4. The spiral blades 5 continuously rotate and squeeze solid dirt, and the drain holes of the screen barrel separate the sewage. The outer wall of the spiral blades simultaneously scrapes off the silt and fibers attached to the inner wall of the screen barrel and the drain holes, realizing the self-cleaning of the screen barrel without the need to stop the machine for flushing.

[0023] Combination Figure 3 The pressure release chamber 6 is integrally formed in the upper spiral working area of ​​the perforated screen barrel 4. The gap between the spiral blades 5 and the inner wall of the screen barrel is widened to 50mm. Flexible debris such as cloth strips and thick paper scraps are wrapped and stuck in the 1mm narrow gap. They enter the release chamber as the spiral blades 5 rotate, and the squeezing pressure is released instantly. The stuck debris falls to the lower part of the screen barrel by its own weight and is continuously pushed to the front cleaning port 3 by the spiral blades 5. The operator can open the cleaning port 3 to take out the dried mud cake. There is no problem of equipment jamming and shutdown throughout the process.

[0024] Combination Figure 1 , Figure 4The bottom permeable sieve 4 is connected to the secondary filter box 12 below the box body 1. The sewage first passes through the micropores of the sieve to intercept large particles of sludge and fibers. The filtered sewage flows into the secondary filter box 12 to complete secondary fine filtration, where all small suspended impurities are intercepted. The clean sewage enters the back-end sewage pump, completely avoiding pump blockage failure.

[0025] Combination Figure 1 , Figure 2 , Figure 4 The vacuum suction pipeline connects the gas-water separator 7 and the solenoid valve 8 in series. A level gauge 10 is vertically installed inside the housing 1, and the level gauge 10 is electrically linked to the solenoid valve 8. A vacuum gauge 11 is installed at the top of the vacuum pipeline to monitor the negative pressure in real time. When the sewage level in the housing 1 reaches a preset safety upper limit, the level gauge 10 triggers the solenoid valve 8 to open, depressurizing the vacuum pipeline and stopping sewage suction. Simultaneously, the gas-water separator 7 separates the liquid sewage entrained in the pipeline. The combined effect of level depressurization and gas-water separation effectively prevents sewage from flowing back into the vacuum pump along the vacuum pipeline, effectively protecting the vacuum pump.

[0026] When the spiral blade 5 rotates continuously, its outer wall scrapes against the inner wall of the perforated screen barrel 4 and the drain hole of the screen barrel, automatically removing dirt attached to the hole wall and realizing the self-cleaning of the screen barrel.

[0027] In this process, the cloth strips, paper scraps and other debris that are entangled and stuck in the gap between the spiral blade 5 and the perforated screen 4 enter the pressure release chamber 6 as the spiral blade 5 rotates. The gap in the chamber widens to release the pressure, and the stuck debris falls to the bottom of the screen 6 by its own weight. It is then pushed by the spiral blade 5 to the slag removal port 3 for discharge, thus achieving self-release of the stuck debris.

[0028] In this process, the wastewater first passes through the perforated screen 4 to initially intercept large solid particles. After filtration, the wastewater flows into the secondary filter box 12 to complete secondary fine filtration, thus doubly intercepting solid impurities and preventing impurities from entering the downstream sewage pump and causing blockage.

[0029] When the sewage level inside the tank 1 reaches a set threshold, the level gauge 10 triggers the solenoid valve 8 to open and release pressure. At the same time, the steam-water separator 7 separates the liquid sewage in the pipeline, thus doubly blocking the sewage from flowing back into the vacuum pump along the suction pipeline.

[0030] Secondly, the spiral blades 5 continuously compress the sludge under high pressure, causing the sludge to dehydrate and form a solid mud cake with low water content. The mud cake can be directly removed by opening the sludge removal port 3. No sewage flows out during the sludge removal operation, thus avoiding secondary pollution.

[0031] Furthermore, the vacuum gauge 11 is mounted on the vacuum suction pipeline to collect and display the negative pressure value of the pipeline in real time and provide real-time feedback on the equipment's sewage suction operation status.

[0032] Using the vehicle-mounted small-scale sewage treatment equipment of this embodiment, the whole machine is lightweight and compact, and can be directly fixed to the compartment of a blue-plate vacuum truck; continuous operation is free from screen clogging, spiral slag jamming, pump blockage, and vacuum pump water ingress damage; the sludge cake after squeezing and dewatering has low moisture content; and there is no sewage leakage during sludge removal. It is suitable for mobile on-site treatment of septic tanks in old urban residential areas and domestic sewage in factories, and solves the technical problems of easy clogging of existing drum filter equipment, large size and weight of traditional sewage treatment equipment that cannot be adapted to blue-plate vacuum trucks, easy slag jamming of spiral equipment, and easy damage to sewage pumps and vacuum pumps.

[0033] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A vehicle-mounted small-scale sewage treatment device, characterized in that, The equipment includes a body, suction pipe, slag removal port, perforated screen, spiral blades, pressure relief chamber, spiral reducer, secondary filter box, air-water separator, solenoid valve, level gauge, and vacuum gauge. The overall length is less than 2m, the height is less than 1.3m, and the weight is less than 0.5 tons, making it suitable for installation on a blue-plate vacuum truck. The spiral blades are coaxially mounted inside the perforated screen, with a 1mm gap between the outer wall of the spiral blades and the inner wall of the perforated screen during normal operation. A pressure relief chamber is located at the top of the perforated screen, with a 50mm gap between the spiral blades inside the chamber and the inner wall of the perforated screen. The lower part of the perforated screen is connected to the secondary filter box, forming a double-layer filtration structure. The vacuum suction pipe is connected in series with the air-water separator and the solenoid valve. A level gauge is installed inside the body, with its signal terminal electrically connected to the solenoid valve. A closable slag removal port is located at the front of the body, and the spiral reducer drives the spiral blades to rotate and squeeze the sludge for dewatering.

2. The vehicle-mounted small-scale sewage treatment equipment as described in claim 1, characterized in that, When the spiral blades rotate continuously, their outer walls scrape against the inner wall of the perforated screen barrel and the drain holes of the screen barrel, automatically removing dirt attached to the perforated walls and achieving self-cleaning of the screen barrel.

3. The vehicle-mounted small-scale sewage treatment equipment as described in claim 2, characterized in that, Cloth strips, paper scraps, and other debris that are entangled and stuck in the gap between the spiral blades and the perforated screen barrel enter the pressure release chamber as the spiral blades rotate. The gap in the chamber widens, thus releasing the pressure. The stuck debris falls to the bottom of the screen barrel by its own weight and is pushed to the slag removal port by the spiral blades for discharge, thus achieving self-release of the stuck debris.

4. The vehicle-mounted small-scale sewage treatment equipment as described in claim 3, characterized in that, Wastewater first passes through the perforated screen barrel to initially intercept large solid particles. After filtration, the wastewater flows into the secondary filter box to complete secondary fine filtration. This double interception of solid impurities prevents impurities from entering the downstream sewage pump and causing blockage.

5. The vehicle-mounted small-scale sewage treatment equipment as described in claim 4, characterized in that, When the sewage level inside the compartment reaches a set threshold, the level gauge triggers the solenoid valve to open and release pressure. At the same time, the steam-water separator separates the liquid sewage in the separation pipeline, thus doubly preventing the sewage from flowing back into the vacuum pump along the air intake pipeline.

6. The vehicle-mounted small-scale sewage treatment equipment as described in claim 5, characterized in that, The spiral blades continuously compress the sludge under high pressure, causing it to dehydrate and form a solid mud cake with low moisture content. The mud cake can be directly removed by opening the sludge removal port. No wastewater flows out during the sludge removal operation, avoiding secondary pollution.

7. The vehicle-mounted small-scale sewage treatment equipment as described in claim 6, characterized in that, The vacuum gauge is installed on the vacuum suction line to collect and display the negative pressure value of the line in real time and provide real-time feedback on the equipment's sewage suction operation status.

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