High-solid-content sludge pyrohydrolysis pretreatment device based on anaerobic digestion

Abstract

The utility model relates to the technical field of sludge hydrothermal pretreatment, and discloses a high-solid-content sludge pyrohydrolysis pretreatment device based on anaerobic digestion, which comprises a treatment kettle, a feed pipe, a discharge pipe, a driving motor, a drain pipe, a treatment box, a water return pipe, a water pump, a water delivery pipe and a water replenishing pipe, the feeding pipe is arranged at one end of the treatment kettle, the discharging pipe is arranged at the other end of the treatment kettle, the driving motor is fixedly connected to the top of the treatment kettle, the drainage pipe is installed below the feeding pipe, the treatment box is fixedly connected to the bottom of one end of the treatment kettle, and the water return pipe is arranged on one side of the treatment box. According to the high-solid-content sludge pyrohydrolysis pretreatment device based on anaerobic digestion, hot water which is not fully reacted enters the water return bin through the bottom plate, enters the treatment box again through the water return pipe and is treated through the treatment box, the hot water is conveyed into the spraying pipe from the water conveying pipe again through the water pump, secondary use of the hot water is conducted, and water resources are conveniently saved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge hydrothermal pretreatment, in particular to a high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion. Background Art

[0002] The anaerobic digestion technology of sludge refers to the biochemical reaction of sludge under the action of anaerobic and facultative bacteria. Microorganisms decompose the organic matter in the sludge under an anaerobic environment to make the sludge harmless and stabilized, and at the same time produce methane gas. This technology can not only make the sludge harmless, stabilize and reduce the amount of sludge, but also produce methane gas, realizing the resource disposal of sludge. It is the most widely used technology in municipal sewage treatment plants.

[0003] According to publication number CN205188094U, a high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion is disclosed, including a preheating kettle, a reactor and a pressure relief kettle equipped with a stirring device, and a steam supply system for providing steam. The steam inlets of the preheating kettle and the reactor are both arranged at the lower part of the side wall, and the steam distributor in the kettle is an annular wall-attached perforated pipe, and a high-temperature resistant filter layer is provided on the hole to prevent blocking; the pressure relief kettle is a flash kettle with a water-cooled interlayer in the tank body, and the opening time and flow rate of the interlayer water are controlled by a temperature detection and water volume control interlocking device. The reflux steam pipeline of the pressure relief kettle is connected in parallel with the straight pipeline of the steam supply system and keeps in a connected state; the stirring paddles of the stirrers in the preheating kettle and the reactor are spirally coiled in the same direction of rotation. The utility model can maximize the gas production rate and processing capacity of sludge anaerobic digestion, reduce construction cost and operation cost, and can process sludge with high solid content and a wide range of organic matter content.

[0004] However, the above device still has some shortcomings. The hot water is pre-treated by steam, but the water cannot be recycled after the steam treatment, which results in a waste of water. Utility Model Content

[0005] The utility model aims to provide a high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion, comprising a treatment kettle, a feed pipe, a discharge pipe, a drive motor, a drain pipe, a treatment box, a return pipe, a water pump, a water pipe and a water supply pipe, wherein the feed pipe is arranged at one end of the treatment kettle, the discharge pipe is arranged at the other end of the treatment kettle, the drive motor is fixedly connected to the top of the treatment kettle, the drain pipe is installed below the feed pipe, the treatment box is fixedly connected to the bottom of one end of the treatment kettle, the return pipe is arranged on one side of the treatment box, the water pump is fixedly connected to the top of the treatment box, the water supply pipe flange is connected to the top of the water pump, and the water supply pipe is arranged above one end of the treatment box.

[0007] Preferably, the treatment kettle includes a kettle body, a bottom plate, a heating element, a spray pipe, a rotating roller, a stirring paddle and a cleaning element. The bottom plate is fixedly connected to the inside of the kettle body, the heating element is fixedly connected to the top of the bottom plate, the spray pipe is arranged above the inside of the kettle body, the rotating roller is rotatably connected to the inside of the kettle body, the stirring paddle is fixedly connected to the outside of the rotating roller, and the cleaning element is arranged at one end of the stirring paddle. The heating element provides a stable temperature in the kettle body to facilitate the reaction of hot water and sludge. The rotating roller cooperates with the stirring paddle to rotate, thereby accelerating the pretreatment of sludge hot water and improving the efficiency of pretreatment.

[0008] Preferably, the cleaning element includes a connecting rod and a cleaning plate, the connecting rod is fixedly connected to one end of the stirring paddle, the cleaning plate is fixedly connected to the other end of the connecting rod, and the other side of the cleaning plate is movably connected to the inner wall of the heating element. The cleaning plate is driven to rotate by the stirring paddle, thereby cleaning the inner wall of the heating element to avoid sludge adhesion and reduce the heating efficiency, thereby ensuring the efficiency of sludge hot water pretreatment in the kettle.

[0009] Preferably, the processing box includes a box body, a heating plate and a filter plate. The heating plate is fixedly connected to the top of the box body, and the filter plate is arranged below the heating plate. The hot water flowing back into the processing box is filtered by the filter plate and then heated by the heating plate to ensure the temperature of the hot water. The water is then input into the kettle body again for use through a water pump, thereby improving the utilization efficiency of hot water.

[0010] Preferably, the other end of the water delivery pipe passes through the kettle body and is connected to a spray pipe flange, so that the hot water in the treatment box is sprayed inside the kettle body through the spray pipe.

[0011] Preferably, the bottom of the bottom plate is configured as a return water bin, through which the sludge and water are separated, and after the hot water enters the return water bin, it enters the interior of the treatment box through the return water pipe for secondary treatment of the hot water.

[0012] Preferably, the number of the stirring paddles is three groups, which are evenly distributed outside the rotating roller, so as to facilitate the stirring of sludge of different depths and the pretreatment of the sludge with hot water.

[0013] Preferably, the height of the cleaning plate is consistent with the height of the heating element, ensuring a good cleaning effect on the inner wall of the heating element.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. In the high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion, the hot water that has not fully reacted enters the return water tank through the bottom plate, and re-enters the interior of the treatment tank through the return water pipe. After being processed in the treatment tank, the hot water is again transported from the water pipe to the spray pipe using a water pump for secondary use of the hot water, which is convenient for saving water resources.

[0016] 2. The high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion drives the cleaning plate to rotate through the stirring paddle, thereby cleaning the inner wall of the heating element to avoid sludge adhesion and reduce heating efficiency, thereby ensuring the sludge hot water pretreatment efficiency in the kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the processing kettle of the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the processing box of the utility model;

[0020] Figure 4 It is a structural schematic diagram of the cleaning piece of the utility model.

[0021] In the figure: 1, processing kettle; 2, feed pipe; 3, discharge pipe; 4, drive motor; 5, drain pipe; 6, processing box; 7, return pipe; 8, water pump; 9, water pipe; 10, water supply pipe; 101, kettle body; 102, bottom plate; 103, heating element; 104, spray pipe; 105, rotating roller; 106, stirring paddle; 107, cleaning element; 110, connecting rod; 111, cleaning plate; 601, box body; 602, heating plate; 603, filter plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The utility model provides a technical solution: a high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion, comprising a treatment kettle 1, a feed pipe 2, a discharge pipe 3, a drive motor 4, a drain pipe 5, a treatment box 6, a return pipe 7, a water pump 8, a water pipe 9 and a water supply pipe 10. The feed pipe 2 is arranged at one end of the treatment kettle 1, the discharge pipe 3 is arranged at the other end of the treatment kettle 1, the drive motor 4 is fixedly connected to the top of the treatment kettle 1, the drain pipe 5 is installed below the feed pipe 2, the treatment box 6 is fixedly connected to the bottom of one end of the treatment kettle 1, the return pipe 7 is arranged on one side of the treatment box 6, the water pump 8 is fixedly connected to the top of the treatment box 6, the water pipe 9 is flange-connected to the top of the water pump 8, and the water supply pipe 10 is arranged above one end of the treatment box 6.

[0024] The treatment kettle 1 includes a kettle body 101, a bottom plate 102, a heating element 103, a spray pipe 104, a rotating roller 105, a stirring paddle 106 and a cleaning element 107. The bottom plate 102 is fixedly connected to the inside of the kettle body 101, the heating element 103 is fixedly connected to the top of the bottom plate 102, the spray pipe 104 is arranged above the inside of the kettle body 101, the rotating roller 105 is rotatably connected to the inside of the kettle body 101, the stirring paddle 106 is fixedly connected to the outside of the rotating roller 105, and the cleaning element 107 is arranged at one end of the stirring paddle 106. To provide a stable temperature inside the kettle 101 to facilitate the reaction between hot water and sludge, the rotating roller 105 is used to drive the stirring paddle 106 to rotate, so as to accelerate the pretreatment of sludge hot water and improve the efficiency of pretreatment. The other end of the water pipe 9 passes through the kettle 101 and is flange-connected with the spray pipe 104. The hot water in the treatment box 6 is sprayed inside the kettle 101 through the spray pipe 104. There are three groups of stirring paddles 106, which are evenly distributed on the outside of the rotating roller 105, so as to facilitate the stirring of sludge of different depths and the pretreatment of sludge with hot water.

[0025] The cleaning member 107 includes a connecting rod 110 and a cleaning plate 111. The connecting rod 110 is fixedly connected to one end of the stirring paddle 106, and the cleaning plate 111 is fixedly connected to the other end of the connecting rod 110. The other side of the cleaning plate 111 is movably connected to the inner wall of the heating member 103. The cleaning plate 111 is driven to rotate by the stirring paddle 106, so as to clean the inner wall of the heating member 103 to avoid sludge adhesion and reduce the heating efficiency, thereby ensuring the sludge hot water pretreatment efficiency in the kettle body 101. The height of the cleaning plate 111 is consistent with the height of the heating member 103, so as to ensure a good cleaning effect on the inner wall of the heating member 103.

[0026] The bottom of the bottom plate 102 is configured as a water return bin, through which the sludge and water are separated. After the hot water enters the water return bin, it enters the interior of the treatment box 6 through the water return pipe 7 for secondary treatment of the hot water.

[0027] The processing box 6 includes a box body 601, a heating plate 602 and a filter plate 603. The heating plate 602 is fixedly connected to the top of the box body 601, and the filter plate 603 is arranged below the heating plate 602. The hot water flowing back into the processing box 6 is filtered by the filter plate 603, and then heated by the heating plate 602 to ensure the temperature of the hot water. Then, the water is input into the kettle body 101 again through the water pump 8 for use, thereby improving the utilization efficiency of hot water.

[0028] When in use, the high-solid sludge is fed into the interior of the treatment kettle 1 through the feed pipe 2, and then hot water is sprayed on the sludge in the kettle body 101 through the spray pipe 104. At the same time, the heating element 103 is started to heat the temperature in the kettle body 101 to ensure that the temperature in the kettle body 101 is stable. The high-solid sludge can fully react with the hot water by driving the stirring paddle 106 to rotate through the rotating roller 105, so that the high-solid sludge can fully react with the hot water to dilute the solid sludge, and then be discharged through the discharge pipe 3. The hot water that has not fully reacted enters the return water bin through the bottom plate 102, and re-enters the interior of the treatment box 6 through the return water pipe 7. After being processed by the treatment box 6, the water pump 8 is used to transport the hot water from the water pipe 9 to the spray pipe 104 again, and the hot water is used for secondary use, which is convenient for saving water resources.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion, comprising a treatment kettle (1), a feed pipe (2), a discharge pipe (3), a drive motor (4), a drainage pipe (5), a treatment box (6), a return pipe (7), a water pump (8), a water delivery pipe (9) and a water supply pipe (10), characterized in that: The feed pipe (2) is arranged at one end of the treatment kettle (1), the discharge pipe (3) is arranged at the other end of the treatment kettle (1), the drive motor (4) is fixedly connected to the top of the treatment kettle (1), the drain pipe (5) is installed below the feed pipe (2), the treatment box (6) is fixedly connected to the bottom of one end of the treatment kettle (1), the return pipe (7) is arranged on one side of the treatment box (6), the water pump (8) is fixedly connected to the top of the treatment box (6), the water delivery pipe (9) is flange-connected to the top of the water pump (8), and the water supply pipe (10) is arranged above one end of the treatment box (6).

2. The high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion according to claim 1, characterized in that: The processing kettle (1) comprises a kettle body (101), a bottom plate (102), a heating element (103), a spray pipe (104), a rotating roller (105), a stirring paddle (106) and a cleaning element (107); the bottom plate (102) is fixedly connected to the inside of the kettle body (101); the heating element (103) is fixedly connected to the top of the bottom plate (102); the spray pipe (104) is arranged above the inside of the kettle body (101); the rotating roller (105) is rotatably connected to the inside of the kettle body (101); the stirring paddle (106) is fixedly connected to the outside of the rotating roller (105); and the cleaning element (107) is arranged at one end of the stirring paddle (106).

3. The high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion according to claim 2, characterized in that: The cleaning member (107) comprises a connecting rod (110) and a cleaning plate (111), wherein the connecting rod (110) is fixedly connected to one end of the stirring paddle (106), and the cleaning plate (111) is fixedly connected to the other end of the connecting rod (110), and the other surface of the cleaning plate (111) is movably connected to the inner wall of the heating member (103).

4. The high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion according to claim 1, characterized in that: The processing box (6) comprises a box body (601), a heating plate (602) and a filter plate (603); the heating plate (602) is fixedly connected to the top of the box body (601), and the filter plate (603) is arranged below the heating plate (602).

5. The high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion according to claim 1, characterized in that: The other end of the water delivery pipe (9) passes through the kettle body (101) and is flange-connected to the spray pipe (104).

6. The high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion according to claim 2, characterized in that: The bottom of the bottom plate (102) is configured as a water return tank.

7. The high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion according to claim 2, characterized in that: The number of the stirring paddles (106) is three groups, which are evenly distributed outside the rotating roller (105).

8. The high-solid sludge thermal hydrolysis pretreatment device based on anaerobic digestion according to claim 3, characterized in that: The height of the cleaning plate (111) is consistent with the height of the heating element (103).

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