Municipal sludge dewatering self-cleaning efficient sludge unloading assisting filter pressing system

Abstract

The utility model discloses a municipal sludge dewatering self-cleaning efficient sludge unloading assisting filter pressing system which comprises a filter pressing machine body, a filter pressing machine supporting beam is fixedly arranged in the filter pressing machine body, a filter plate and filter cloth are arranged above the filter pressing machine supporting beam, and one end of the filter pressing machine supporting beam is connected with a thrust plate; the hydraulic system is arranged on one side of the filter press body, the hydraulic system is connected to a hydraulic push rod through an external pipeline, the hydraulic push rod pushes the filter plate to press sludge clamped in a cavity between the filter plate and the filter cloth, and a high-pressure water inlet is formed in one end of the cavity between the filter plate and the filter cloth; the multifunctional integrated device is arranged above the filter press body and can automatically shovel mud, unload mud, clean and spray a release agent, and the problems that after sludge is dewatered, gravity mud unloading and vibration mud unloading are difficult, manual mud shoveling operation is needed, and time and labor are wasted are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal sludge treatment, sludge dehydration and sludge drying, and in particular to a municipal sludge dehydration self-cleaning high-efficiency auxiliary unloading sludge filter press system. Background Art

[0002] With the improvement of sludge treatment standards, the requirements for the moisture content of municipal sludge dewatering and leaving the factory are getting lower and lower. The residual sludge from the sewage treatment plant is concentrated by gravity in the sludge thickening tank and then transported to the sludge reaction tank for adding PAC, PAM and lime conditioning agents. The conditioned sludge can easily achieve a mud cake moisture content of ≤60% by adjusting the pressing pressure and pressing time. The mud cake is relatively dry. At present, the common situation is that the mud cake is stuck to the filter cloth and is not easy to unload. Gravity unloading and vibration unloading are difficult and require operators to shovel mud manually, which is time-consuming and labor-intensive. At the same time, the long-term accumulation of some sludge on the filter cloth will reduce the filter pressing effect and shorten the service life of the filter cloth. Therefore, there is an urgent need for a municipal sludge dewatering self-cleaning and high-efficiency mud unloading filter press system that can thoroughly clean the filter cloth and easily separate the mud cake from the filter cloth. Utility Model Content

[0003] The utility model aims to provide a municipal sludge dewatering self-cleaning high-efficiency assisted mud unloading filter press system to solve the problem in the above background technology that after sludge dewatering, gravity unloading and vibration unloading are difficult and require manual mud shoveling operation, which is tedious, time-consuming and labor-intensive.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a municipal sludge dehydration self-cleaning high-efficiency mud unloading filter press system, comprising a filter press body, a filter press support beam is fixedly arranged inside the filter press body, a filter plate and a filter cloth are arranged above the filter press support beam, a thrust plate is connected to one end of the filter press support beam, a washing port is arranged above one side of the thrust plate, a feed port is arranged on one side of the cavity where the filter plate and the filter cloth are located, an undercurrent outlet is arranged below one side of the thrust plate, and filter press legs are installed on both sides of the lower end of the filter press body; it also includes: a hydraulic system, which is arranged on one side of the filter press body, the hydraulic system is connected to a hydraulic push rod through an external pipeline, the hydraulic push rod pushes the filter plate to squeeze the sludge in the cavity between the filter plate and the filter cloth, and a high-pressure water inlet is arranged below the washing port; a multifunctional integrated device, which is arranged above the filter press body, and the multifunctional integrated device can perform the actions of automatic mud shoveling, mud unloading, cleaning and spraying release agent.

[0005] Preferably, a plate pulling mechanical arm is provided at the front end of the hydraulic push rod, and the track on which the plate pulling mechanical arm is located is fixed to the filter press body by bolts, and an electric control box is also installed on one side of the filter press body, and a mud unloading flap is provided below the filter plate and the filter cloth, and the two ends of the mud unloading flap are rotatably connected to the filter press legs, and a travel switch is provided on the track of the plate pulling mechanical arm, and the movement of the plate pulling mechanical arm is controlled by the PLC program of the electric control box to pull the vibrating diaphragm filter plate back and forth, so as to help the mud cake after filtration to be unloaded onto the mud unloading flap.

[0006] Preferably, the multifunctional integrated device consists of a scraper, a nozzle, a fixing frame and a travel drive, the nozzle is arranged on both sides of the bottom of the multifunctional integrated device, the scraper is arranged on the inner side of the tube body where the nozzle is located, the travel drive is installed at the lower end of the multifunctional integrated device, one end of the travel drive is connected to a travel guide rail, and the scraper is made of a hard anti-stick and corrosion-resistant plastic plate.

[0007] Preferably, a release agent box and a water tank are provided outside the filter press body, the release agent box is connected to the pipe body of the multifunctional integrated device through a pipeline, and a pump is installed at the middle position of the pipeline, and the water tank is connected to the pipe body of the multifunctional integrated device through a pipeline, and a high-pressure pump is installed at the middle position of the pipeline.

[0008] Preferably, it includes a high-pressure air back-blowing system, which is composed of an air compressor, a first filter, a cold dryer, a second filter, a high-pressure gas storage tank and a high-pressure air back-blowing valve, the air outlet end of the air compressor is connected to the inlet end of the first filter, the outlet end of the first filter is connected to the inlet end of the cold dryer, the outlet end of the cold dryer is connected to the inlet end of the second filter, and the outlet end of the second filter is connected to the air inlet end of the high-pressure gas storage tank.

[0009] Preferably, a high-pressure air backflush inlet is provided below the washing port, and the high-pressure air backflush inlet is connected to the high-pressure air storage tank through a pipeline, and a high-pressure air backflush connection port is provided at the lower end of the filter plate, and the high-pressure air backflush connection port is connected to the high-pressure air backflush inlet, the air passes through the first filter, the air is filtered, the air is cooled by heat exchange in the cold dryer, and then further filtered through the second filter, the compressed air enters the high-pressure air storage tank for storage, the high-pressure air backflush valve is opened, and the high-pressure air enters from the high-pressure air backflush inlet, is connected to the high-pressure air backflush connection port installed on the filter plate through a high-strength hose, and the filter cloth installed on the diaphragm filter plate is backflushed to separate the mud cake from the filter cloth, help the mud cake to be unloaded, and fall under gravity, the filter cloth is backflushed and steam washed by high-pressure air, and the filtration flux of the filter cloth is restored.

[0010] Preferably, the multifunctional integrated device performs high-pressure cleaning on all filter plates and filter cloths that have completed the scraping and unloading operation steps, and finally automatically sprays the release agent stored in the release agent box on the cleaned diaphragm filter plates and filter cloths through a pump to prepare for the next sludge dehydration and filtration.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model adopts ultra-high-efficiency sludge dehydration, and utilizes a multifunctional integrated device for automatic shoveling, cleaning, and release agent spraying. In particular, after the filter cloth is sprayed with a release agent, a membrane isolation layer is formed on the surface and gaps of the filter cloth, which is conducive to the water in the pressed sludge to flow out through the filter cloth, so that the mud cake is separated from the filter cloth more quickly and falls off. At the same time, a high-pressure air back-blowing system is configured, which back-blows from the filter cloth end under high-pressure air power to separate the mud cake from the filter cloth and drop it under gravity. The filter cloth is back-blown and steam-washed by high-pressure air to restore the filtration flux of the filter cloth. The utility model has greatly improved the problem that gravity unloading and vibration unloading are difficult after sludge dehydration, and manual shoveling is required, which is cumbersome, time-consuming and laborious. The utility model has a high degree of automation and effectively prolongs the service life of the filter cloth. It has broad application prospects for municipal sewage treatment plants that urgently need technical updates and product upgrades for municipal sludge dehydration. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the mainframe structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the multifunctional integrated device of the utility model;

[0015] Figure 3 This is a schematic structural diagram of the membrane filter plate, filter cloth, and mud cake of the utility model;

[0016] Figure 4 It is a schematic diagram of the high-pressure air backflush system of the utility model.

[0017] In the figure: 101, hydraulic system; 102, electric control box; 103, plate pulling mechanical arm; 104, hydraulic push rod; 105, filter plate; 106, filter cloth; 107, multifunctional integrated device; 108, thrust plate; 109, washing port; 110, feed port; 111, filter press support beam; 112, undercurrent outlet; 113, filter press support leg; 114, mud unloading flap; 115, release agent box; 116, water tank; 117, high-pressure pump; 118, Pump; 119, scraper; 120, nozzle; 121, mud cake; 122, high-pressure water inlet; 1221, high-pressure air back-blow inlet; 123, air compressor; 124, first filter; 125, cold dryer; 126, second filter; 127, high-pressure air storage tank; 128, high-pressure air back-blow valve; 129, high-pressure air back-blow connection port; 130, fixed frame; 131, walking guide rail; 132, walking drive; 133, filter press body. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] See also Figure 1-4The utility model provides an embodiment: a municipal sludge dehydration self-cleaning high-efficiency assisted mud filter press system, including a hydraulic system 101, the system is composed of a hydraulic pump, a driving motor, an oil tank, a directional valve, a throttle valve, and a relief valve, which is connected to a hydraulic push rod 104 through an external pipeline. After the mud enters, the filter plate 105 is pushed to squeeze the sludge in the cavity between the diaphragm filter plate 105 and the filter cloth 106, and the free water in the sludge is squeezed out. High-pressure water is pumped into the cavity of the filter plate 105 from the high-pressure water inlet 122 through a high-pressure pump 117, so that the filter plate 105 expands to further squeeze and pressurize the sludge, thereby accelerating the extrusion of free water in the mud. The filter plate 105 and the filter cloth 106 are connected to the filter press support beam 111, the diaphragm filter plate 105 and the filter cloth 106 are installed in series, and the number of filter plates is adjustable. The end of the filter press support beam 111 is connected to the thrust plate 108, which is used to support the thrust during the filter pressing operation. The washing port 109 is used to clean the filter cloth 106. The feed port 110 is used to feed sludge. The undercurrent outlet 112 is used to discharge the high-pressure water pumped into the diaphragm filter plate cavity. The filter press support legs 113 support the weight of the entire filter press device. The plate pulling mechanical arm 103 installed on the main beam of the filter press is used to pull back the membrane filter plate 105 of the filter press after the sludge squeezing is completed. There is a travel switch on the track of the plate pulling mechanical arm 103. The action of the plate pulling mechanical arm 103 is controlled by the PLC program of the electric control box 102. The membrane filter plate 105 is pulled back and forth and the speed is adjusted to form vibration, so as to help the mud cake 121 after filtration to be unloaded onto the mud unloading flap 114. The plate pulling mechanical arm 103 system is mainly composed of a frequency conversion motor, a plate puller, a sprocket, a chain, a chain groove, a protective cover, etc. The frequency conversion motor has a wide speed regulation range and can be adjusted arbitrarily between 0Hz-50Hz to adjust the plate pulling speed.

[0020] See also Figure 1-3The top of the filter press body 133 is equipped with a multifunctional integrated device 107 for automatic mud scraping, cleaning, and release agent spraying. The device can move up and down, and the moving distance can be adjusted according to the size of the diaphragm filter plate. It integrates the three functions of mud scraping, cleaning the filter plate 105, filter cloth 106, and release agent spraying. The device is composed of a fixed frame 130, a walking guide rail 131, a walking driver 132, a mud scraper 119, a nozzle 120, a hose, etc., and the auxiliary equipment is composed of a release agent box 115, a water tank 116, a pump 118, a high-pressure pump 117, etc. The release agent box 115 is filled with a release agent and connected to the pump 118 through a pipeline. The water tank 116 is filled with clean water and connected to the high-pressure pump 117 through a pipeline. The mud scraper 119 is used to scrape and unload mud from the mud cake 121 after filtration. The mud scraper 119 adopts a hard anti-sticking and corrosion-resistant plastic plate. The nozzle 120 is fixedly installed at the bottom of the multifunctional integrated device 107. The nozzle 120 can be used for two purposes, namely, spraying a release agent and cleaning water. The release agent box 115, the pump 118, the water tank 116 and the high-pressure pump 117 are connected through pipelines. Under the control of the PLC of the electric control box 102, the mud cake 121 attached to the filter cloth 106 after the filter press is completed is scraped and unloaded. With the cooperation of the plate pulling mechanical arm 103, gravity vibration is used to unload the mud, and the tightness and distance of the two scraper plates 119 are adjustable.

[0021] See also Figure 4The high-pressure air back-blowing system is composed of an air compressor 123, which prepares compressed air with a pressure of up to 0.85 MPa. After the mud cake 121 is filtered and the automatic mud shoveling operation is completed, the high-pressure air back-blowing valve 128 is opened, and the high-pressure air enters from the high-pressure air back-blowing inlet 1221, and is connected to the high-pressure air back-blowing connection port 129 installed on the filter plate 105 through a high-strength hose, and the filter cloth 106 installed on the diaphragm filter plate 105 is back-blown, so that the mud cake 121 that has not fallen off after the mud shoveling action and gravity vibration is separated from the filter cloth, and the mud cake 121 is helped to be unloaded, and the filter cloth 106 is back-blown and air-washed by high-pressure air, and the filtration flux of the filter cloth 106 is restored. After the backflush operation is completed, the multifunctional integrated device 107 is driven by the reduction motor to move forward to the middle position of the pull plate space and then stops. The PLC control program of the electric control box 102 starts the high-pressure pump 117 to perform the water cleaning operation. In the water spraying state, the water washing pipe moves down and up to complete the high-pressure water cleaning action on both sides of the filter cloth 106. The water tank 116 is equipped with a liquid level control float to achieve high and low position protection. After the high-pressure water cleaning action is completed, the PLC control program of the electric control box 102 starts the pump 118 to spray the release agent on the filter cloth 106. The release agent tank is equipped with a liquid level control float to achieve high and low position protection. The release agent is sprayed onto the filter cloth 106 through the nozzle 120, so that an isolation film is formed on the surface of the filter cloth 106, and the sludge is not retained to separate from the water, which helps the filter cloth 106 to be efficiently separated from the mud cake 121, and the mud is efficiently and quickly unloaded; the PLC program controller inside the electric control box 102 has the characteristics of stable performance, safety and reliability, and long service life, and a DCS remote distribution interface is reserved to realize remote monitoring and operation. The PLC program controller inside the electric control box 102 adopts isolation transformer power supply protection, which is resistant to current shock and voltage fluctuation, and uses isolation output to increase the current carrying capacity of the control point, effectively protects the PLC, and also increases the service life of the PLC, and is easy to install and maintain. The control system is set with a manual working state mode during installation and debugging; an automatic working state mode during automatic operation; and a maintenance working state mode during equipment inspection and maintenance. There are three working states in total, which are convenient for operators to use. To prevent malfunction, each moving part has an interlocking function for protection during automatic operation. Through the system's automatic detection and self-diagnosis, the system always automatically detects whether the actuator is in normal working condition. If there is any abnormality, an alarm will be immediately given on the display screen, ensuring the safe and reliable operation of the entire filter press system.

[0022] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A municipal sludge dewatering self-cleaning high-efficiency assisted mud unloading filter press system, comprising a filter press body (133), a filter press support beam (111) fixedly arranged inside the filter press body (133), a filter plate (105) and a filter cloth (106) arranged above the filter press support beam (111), a thrust plate (108) connected to one end of the filter press support beam (111), a washing port (109) arranged above one side of the thrust plate (108), a feed port (110) arranged on one side of a cavity where the filter plate (105) and the filter cloth (106) are located, an undercurrent outlet (112) arranged below one side of the thrust plate (108), and filter press legs (113) installed on both sides of the lower end of the filter press body (133); characterized in that: Also includes: A hydraulic system (101) is arranged on one side of the filter press body (133); the hydraulic system (101) is connected to a hydraulic push rod (104) via an external pipeline; the hydraulic push rod (104) pushes the filter plate (105) to squeeze the sludge in the cavity between the filter plate (105) and the filter cloth (106); a high-pressure water inlet (122) is arranged below the washing port (109); and a multifunctional integrated device (107) is arranged above the filter press body (133); the multifunctional integrated device (107) is capable of automatically shoveling sludge, unloading sludge, cleaning and spraying a release agent.

2. A municipal sludge dehydration self-cleaning high-efficiency sludge unloading filter press system according to claim 1, characterized in that: A plate pulling mechanical arm (103) is provided at the front end of the hydraulic push rod (104), and the track on which the plate pulling mechanical arm (103) is located is fixed to the filter press body (133) by bolts. An electric control box (102) is also installed on one side of the filter press body (133). A mud unloading flap (114) is provided below the filter plate (105) and the filter cloth (106), and both ends of the mud unloading flap (114) are rotatably connected to the filter press legs (113).

3. The municipal sludge dehydration self-cleaning high-efficiency sludge unloading filter press system according to claim 1 is characterized by: The multifunctional integrated device (107) is composed of a scraper blade (119), a nozzle (120), a fixing frame (130) and a travel drive (132); the nozzle (120) is arranged on both sides of the bottom of the multifunctional integrated device (107); the scraper blade (119) is arranged on the inner side of a tube body where the nozzle (120) is located; the travel drive (132) is installed at the lower end of the multifunctional integrated device (107); and one end of the travel drive (132) is connected to a travel guide rail (131).

4. A municipal sludge dehydration self-cleaning high-efficiency sludge unloading filter press system according to claim 3, characterized in that: A demoulding agent box (115) and a water tank (116) are provided outside the filter press body (133); the demoulding agent box (115) is connected to the pipe body of the multifunctional integrated device (107) via a pipeline, and a pump (118) is installed at the middle position of the pipeline; the water tank (116) is connected to the pipe body of the multifunctional integrated device (107) via a pipeline, and a high-pressure pump (117) is installed at the middle position of the pipeline.

5. The municipal sludge dehydration self-cleaning high-efficiency sludge unloading filter press system according to claim 1 is characterized by: The invention comprises a high-pressure air back-blowing system, the high-pressure air back-blowing system comprising an air compressor (123), a first filter (124), a cold dryer (125), a second filter (126), a high-pressure gas storage tank (127) and a high-pressure air back-blowing valve (128), the air outlet end of the air compressor (123) being connected to the air inlet end of the first filter (124), the outlet end of the first filter (124) being connected to the inlet end of the cold dryer (125), the outlet end of the cold dryer (125) being connected to the inlet end of the second filter (126), and the outlet end of the second filter (126) being connected to the air inlet end of the high-pressure gas storage tank (127).

6. A municipal sludge dehydration self-cleaning high-efficiency assisted unloading sludge filter press system according to claim 5, characterized in that: A high-pressure air back-blow inlet (1221) is provided below the washing port (109), and the high-pressure air back-blow inlet (1221) is connected to the high-pressure air storage tank (127) via a pipeline. A high-pressure air back-blow connecting port (129) is provided at the lower end of each filter plate (105), and the high-pressure air back-blow connecting port (129) is connected to the high-pressure air back-blow inlet (1221).

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