A pulp residue black hydrolyzate separation and drying apparatus

Abstract

The utility model discloses a kind of pulp residue black hydrolysate separation drying equipment, including hydrolysis kettle and tipper, tipper is provided with tipper, the inside surface of tipper is fixed with filter screen, filter screen is set in tipper and sets up suction filter box, suction filter box is provided with suction filter mouth, suction filter mouth is connected with gas-liquid separation tank by pipeline, vacuum pump is provided on gas-liquid separation tank, the outlet of gas-liquid separation tank is communicated with waste liquid tank by pipeline, the outlet of waste liquid tank is communicated with waste liquid pump by pipeline, the outlet of waste liquid pump is communicated with the inlet of hydrolysis kettle by pipeline. The equipment realizes the wastewater recycling use of pulp residue hydrolysis, reduces the pressure of rear-end system wastewater treatment. Through suction filtration mode, the water content in organic silicon pulp residue black hydrolysate can be effectively reduced by about 40%, and the cost of black hydrolysate transportation and subsequent treatment is reduced.

Description

Technical Field

[0001] This utility model relates to the field of solid waste treatment technology, specifically to a separation and drying device for black hydrolysate of pulp residue. Background Technology

[0002] Organosilicon slurry residue is a fluid liquid-solid mixture produced during the synthesis of organosilicon methyl monomers. The liquid phase of this material is mainly high-silicon waste, while the solid phase mainly consists of suspended silicon powder, carbon deposits (organosilicon slurry residue), high copper content, and other metals and their compounds. If this material is exposed to air, it will burn and form strong acid mist and liquid, causing significant harm to personnel and the environment.

[0003] Currently, most domestic and international organosilicon manufacturers use closed-loop hydrolysis to process organosilicon slurry residue. Hydrolysis produces a large amount of black hydrolysate, which is acidic and has a high water content. This black hydrolysate is then outsourced for hazardous waste treatment. Simultaneously, the hydrolysis generates approximately seven times the amount of high-chlorine wastewater, which enters the wastewater treatment plant, increasing wastewater treatment costs. All of these factors contribute to increased production costs for the factory.

[0004] Chinese patent CN103550902B discloses an environmentally friendly process for the hydrolysis and regeneration of organosilicon slurry residue. This invention involves a tubular reactor, in which alkaline water and slurry residue are pumped into the reactor. After the alkaline water reacts with the slurry residue, the black hydrolysate is discharged into a trough. A baffle separates the water and the black hydrolysate. The neutral water after alkaline washing is then recycled. While this invention solves to some extent the problems of slurry residue clumping and clogging during hydrolysis, and also achieves no hydrogen chloride overflow and wastewater recycling, the patent does not explain how the black hydrolysate residue is further processed.

[0005] Chinese patent CN 115475825B discloses a process for treating organosilicon slurry residue, which relates to a method for the resource-based treatment of organosilicon slurry residue, turning waste into treasure. While this invention can reduce the generation of wastewater and solid waste from organosilicon slurry residue treatment, it is more complex than existing processes, has greater operational difficulty, and invisibly increases production and operational costs and risks.

[0006] In summary, the existing methods for treating black hydrolysate of organosilicon slurry residue still have one or more of the following problems: (1) no feasible solution has been proposed for drying the black hydrolysate; (2) the process is complex and difficult to operate; (3) the investment in process improvement is large and the return on investment is low. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the existing defects and provide a slurry residue black hydrolysate separation and drying device. After treating the slurry residue with an alkaline solution, the black hydrolysate is dehydrated and dried by vacuum filtration. At the same time, the neutral wastewater is recycled, ultimately achieving zero wastewater discharge and significantly reducing the water content in the black hydrolysate. This can effectively solve the problems in the background technology.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a slurry residue black hydrolysate separation and drying device, comprising a hydrolysis kettle and a tipper truck, wherein a tipper truck is provided with a tipper bucket, a stirrer is provided inside the hydrolysis kettle, a filter screen is fixedly provided on the inner surface of the tipper bucket, a suction box is provided in the filter screen in the tipper bucket, a suction port is provided on the suction box, the suction port is connected to a gas-liquid separation tank through a pipeline, a vacuum pump is provided on the gas-liquid separation tank, the outlet of the gas-liquid separation tank is connected to a waste liquid tank through a pipeline, the outlet of the waste liquid tank is connected to a waste liquid pump through a pipeline, and the outlet of the waste liquid pump is connected to the inlet of the hydrolysis kettle through a pipeline.

[0009] As a preferred technical solution of this utility model, two sets of sliding grooves are symmetrically opened on the inner surface of the two long side plates of the tipping bucket, and a push plate is slidably arranged in the sliding groove, which is arranged on the upper side of the filter screen.

[0010] As a preferred technical solution of this utility model, a geared motor is installed on the outer surface of the tipping bucket, and a drive screw is rotatably installed in each of the two sliding grooves on the upper side. The drive screw is threadedly connected to the screw hole opened on the side surface of the slider on the push plate. One end of each of the two drive screws passes through the outer surface of the tipping bucket and is connected to the synchronous pulley. A synchronous belt is provided between the two synchronous pulleys. The other end of one of the drive screws is connected to the output shaft of the geared motor through a coupling.

[0011] As a preferred technical solution of this utility model, a fixed guide rod is fixedly installed in each of the two sliding grooves on the lower side of the tipping bucket, and a guide rod hole corresponding to the fixed guide rod is opened on the slider side surface of the push plate located in the lower sliding groove.

[0012] As a preferred embodiment of this utility model, two corrugated pipes are provided in the slide groove. The two corrugated pipes are respectively arranged on both sides of the push plate, and the corrugated pipes are sleeved on the outside of the drive screw and the fixed guide rod.

[0013] As a preferred embodiment of this invention, the inner surface of the tipping bucket is provided with a distance sensor for detecting the position of the push plate.

[0014] As a preferred embodiment of this invention, the inner surface of the tipping bucket is provided with a plurality of photoelectric sensors for detecting the solid phase after drying.

[0015] Compared with existing technologies, the beneficial effects of this invention are as follows: After the black hydrolyzed mixture produced by the hydrolysis of slurry residue in the hydrolysis reactor is directly discharged into the tipper truck, a large amount of water can be directly separated through the filter screen and flow into the waste liquid tank. Then, a vacuum pump is used to further remove moisture from the black hydrolysate in the tipper truck through the suction filtration port, achieving the purpose of drying. The wastewater enters the waste liquid tank after passing through a gas-liquid separator, and is then pumped and mixed with lime slurry solution before being replenished into the hydrolysis reactor for continued use, realizing wastewater recycling. This equipment realizes the recycling of wastewater from slurry residue hydrolysis, reducing the pressure on wastewater treatment in the downstream system. The suction filtration method can effectively reduce the water content in the black hydrolysate of organosilicon slurry residue by about 40%, reducing the cost of transporting and subsequent treatment of the black hydrolysate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the tipping bucket structure of this utility model; Figure 3 This is a side view of the tipping bucket structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the tipping bucket of this utility model; Figure 5 This is a schematic diagram of the internal structure of the tipping bucket of this utility model.

[0017] In the diagram: 1 Hydrolysis vessel, 2 Stirrer, 3 Tipper truck, 4 Filter screen, 5 Vacuum filter box, 6 Vacuum filter port, 7 Waste liquid pump, 8 Waste liquid tank, 9 Gas-liquid separator, 10 Vacuum pump, 11 Tipper, 12 Slide chute, 13 Push plate, 14 Gear motor, 15 Synchronous pulley, 16 Synchronous belt, 17 Drive screw, 18 Fixed guide rod, 19 Bellows, 20 Photoelectric sensor, 21 Distance sensor. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-5This utility model provides a technical solution: a black hydrolysate separation and drying device for slurry and sludge, comprising a hydrolysis tank 1 and a tipper truck 3. The tipper truck 3 is equipped with a tipping bucket 11. A conventional stirrer 2 is installed inside the hydrolysis tank 1. A prepared alkaline solution of a certain concentration (usually lime slurry) is pumped into the hydrolysis tank to a certain liquid level (usually 50%-70%). Then, the slurry and sludge are pumped into the hydrolysis tank at a fixed rate for alkaline hydrolysis, yielding a mixture of black hydrolysate and neutral wastewater. The stirrer 2 agitates the mixture during hydrolysis to improve efficiency.

[0020] A filter screen 4 is fixedly installed on the inner surface of the tipping bucket 11. A filtration box 5 is installed in the filter screen 4 within the tipping bucket 11. The filtration box 5 has a filtration port 6, which is connected to a gas-liquid separator 9 via a pipeline. A vacuum pump 10 is installed on the gas-liquid separator 9. The outlet of the gas-liquid separator 9 is connected to a waste liquid tank 8 via a pipeline. The outlet of the waste liquid tank 8 is connected to a waste liquid pump 7 via a pipeline. The outlet of the waste liquid pump 7 is connected to the inlet of the hydrolysis reactor 1 via a pipeline. The black hydrolyzed mixture produced by the hydrolysis of slurry residue in the hydrolysis reactor 1 is directly discharged into the tipping bucket 11 of the tipping truck 3. A large amount of water can be directly separated through the filter screen 4 and flow into the waste liquid tank. Then, the vacuum pump 10 is used to filter the black hydrolysate in the tipping truck through the filtration port 6 to further remove moisture, achieving the purpose of drying. The wastewater enters the waste liquid tank 8 after passing through the gas-liquid separator 9. Then, it is transported by the waste liquid pump 7 and mixed with lime slurry solution before being replenished into the hydrolysis reactor 1 for continued use, realizing the recycling of wastewater. Using lime slurry to hydrolyze organosilicon slurry residue can avoid the formation of gel chains in the hydrolysate, and can effectively improve the clumping and blockage of the hydrolysis reactor, hydrolysis agitator and auxiliary pipelines, reducing the risk and cost of unblocking and maintenance.

[0021] This equipment enables the recycling of wastewater from slurry hydrolysis, reducing the pressure on downstream wastewater treatment systems. Through filtration, the water content in the black hydrolysate of organosilicon slurry can be effectively reduced by approximately 40%, lowering the costs of transporting and further treating the black hydrolysate.

[0022] Optionally, the tipping bucket 11 is equipped with a pipeline connected to the discharge valve at the bottom of the hydrolysis reactor 1. This pipeline can be a flexible hose to facilitate the tipping bucket 11 to tilt and discharge wastewater and the dried solid phase. A valve can also be installed on this pipeline to seal the tipping bucket 11. A sealing door is located at the rear of the tipping bucket 11. When closed, it works with the valve to ensure a tight seal inside the tipping bucket 11, improving the solid-liquid separation effect of the black hydrolysate inside the tipping bucket during negative pressure filtration by the vacuum pump 10. When opened, it sends the dried solid phase to the downstream process for further processing.

[0023] Optionally, a special material pad is laid at the bottom of the tipping bucket 11. This pad has a porous structure, and a filter screen 4 with a certain mesh size is laid on the top of the pad. This ensures that the pad has sufficient strength to support the material and also ensures the effect of solid-liquid phase separation. In actual operation, the vacuum filtration time can be adjusted appropriately according to the degree of drying of the black hydrolysate.

[0024] During production, lime slurry is pumped into hydrolysis reactor 1. Once a certain liquid level is reached, organosilicon slurry residue is pumped intermittently into the hydrolysis reactor at a certain quantity and frequency. Under the action of stirrer 2, the slurry residue reacts fully with the lime slurry. After the material in the hydrolysis reactor accumulates to a certain liquid level, the discharge valve at the bottom of the hydrolysis reactor is opened, and the mixture of black hydrolysate and wastewater is directly discharged into the tipper hopper 11 of tipper truck 3. The bottom of tipper hopper 11 is lined with a special pad and filter screen 4. At this time, the black hydrolysate separates some water by its own weight. After the black hydrolysate in tipper hopper 11 accumulates to a certain amount, vacuum pump 10 is started. One end of the vacuum pump is connected to the suction port 6 on the outer wall of suction filter box 5. The black hydrolysate in tipper truck is separated into solid and liquid by negative pressure suction filtration. After being separated by the gas phase separator 9, the waste liquid flows into the waste liquid tank 8; the collected liquid phase is then transported by the waste liquid pump 7 and mixed with lime slurry before being sent to the hydrolysis kettle 1 for continued use; the solid phase after filtration and drying is sent to the downstream process for further processing.

[0025] For preferred embodiments, please refer to Figure 2-4 The inner surfaces of the two long side plates of the tipping bucket 11 are symmetrically provided with two sets of sliding grooves 12. Push plates 13 are slidably arranged in the sliding grooves 12. The push plates 13 are located on the upper side of the filter screen 4 and are at a certain distance (10-30mm) from the filter screen 4. By moving the push plates 13, the black hydrolysate on the filter screen 4 inside the tipping bucket 11 can be squeezed, further improving the solid-liquid separation efficiency and the drying speed of the black hydrolysate is faster.

[0026] For preferred embodiments, please refer to Figure 2-4 A geared motor 14 is mounted on the outer surface of the tipping bucket 11. A drive screw 17 is rotatably mounted in each of the two upper sliding grooves 12. The drive screw 17 is threadedly connected to a screw hole on the slider side surface of the push plate 13. One end of each drive screw 17 extends out of the outer surface of the tipping bucket 11 and is connected to a synchronous pulley 15. A synchronous belt 16 is provided between the two synchronous pulleys 15. The other end of one drive screw 17 is connected to the output shaft of the geared motor 14 via a coupling. When the geared motor 14 drives one drive screw 17 to rotate, the synchronous pulley 15 and synchronous belt 16 simultaneously drive the other drive screw 17 to rotate, causing both drive screws 17 to rotate at the same time, moving the push plate 13 to squeeze the black hydrolysate or return it to its original position.

[0027] For preferred embodiments, please refer to Figure 2-4The two sliding grooves 12 on the lower side of the tipping bucket 11 are each fixedly provided with a fixed guide rod 18. The slider side surface of the push plate 13 located in the lower sliding groove 12 is provided with a guide rod hole corresponding to the fixed guide rod 18. When the push plate 13 moves by the drive screw 17, the fixed guide rod 18 can be used to guide and stabilize the lower side of the push plate 13, making the push plate 13 more stable when moving and pressing.

[0028] For preferred embodiments, please refer to Figure 5 Two bellows 19 are provided inside the slide groove 12, respectively located on both sides of the push plate 13, and sleeved on the outside of the drive screw 17 and the fixed guide rod 18. The bellows 19 are telescopic tubes, which can extend or shorten when the push plate 13 moves back and forth. The bellows 19 can provide a sealing protection for the drive screw 17 and the fixed guide rod 18, preventing black hydrolysate and wastewater from contacting the drive screw 17 and the fixed guide rod 18 and causing corrosion and damage, thus further ensuring the moving stability of the push plate 13.

[0029] For preferred embodiments, please refer to Figure 2 The inner surface of the tipping bucket 11 is equipped with a ranging sensor 21 for detecting the position of the push plate 13. The ranging sensor 21 can be a commonly used ultrasonic ranging sensor, such as the Ximan SDP series ultrasonic ranging sensor or the JRT M88B series ultrasonic ranging sensor. The ranging sensor 21 is used to detect the position of the push plate 13, thereby automatically controlling the switching of the reduction motor 14 through the controller, realizing a high degree of automation control process.

[0030] For preferred embodiments, please refer to Figure 2 The inner surface of the tipping bucket 11 is equipped with several photoelectric sensors 20 for detecting the dried solid phase. These sensors can be commonly used WYC-H206 slot-type photoelectric sensors, KI5274 slot-type photoelectric sensors, or Q31-B0300N-SI4U2 reflective photoelectric sensors. The photoelectric sensors 20 can be arranged in a rectangular array and can detect the height of the dried black hydrolysate solid phase inside the tipping bucket 11, thus helping to determine the remaining solid phase for timely delivery to downstream processes. Simultaneously, they can determine the height of the solid phase after compression during the solid-phase separation of waste liquid, and work with the distance measuring sensor 21 to intelligently control the movement distance of the pusher plate 13.

[0031] Both the ranging sensor 21 and the photoelectric sensor 20 are equipped with corresponding waterproof measures.

[0032] The geared motor 14, distance sensor 21, and photoelectric sensor 20 are all powered by the onboard power supply of the dump truck 3 and controlled by a control switch or controller located inside the dump truck 3. When selecting a controller, a commonly used microcontroller or PLC controller is preferred, such as an Arduino series microcontroller or a Siemens S7 series PLC controller. The methods used by the controller to control the geared motor 14, distance sensor 21, and photoelectric sensor 20 are all commonly used methods in the prior art.

[0033] The controller, geared motor 14, ranging sensor 21 and photoelectric sensor 20 used in this application are all commonly used electronic components in the prior art. Their specific structures, working principles, control methods and circuit connections are all well-known technologies and will not be described in detail here.

[0034] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A separation and drying device for black hydrolysate of pulp residue, comprising a hydrolysis kettle (1) and a tipper truck (3), wherein a tipper truck (3) is provided with a tipper (11), characterized in that: The hydrolysis vessel (1) is equipped with a stirrer (2), and a filter screen (4) is fixedly installed on the inner surface of the tilting bucket (11). The filter screen (4) in the tilting bucket (11) is equipped with a suction box (5), and a suction port (6) is provided on the suction box (5). The suction port (6) is connected to the gas-liquid separator (9) through a pipeline. A vacuum pump (10) is provided on the gas-liquid separator (9). The outlet of the gas-liquid separator (9) is connected to the waste liquid tank (8) through a pipeline. The outlet of the waste liquid tank (8) is connected to the waste liquid pump (7) through a pipeline. The outlet of the waste liquid pump (7) is connected to the inlet of the hydrolysis vessel (1) through a pipeline.

2. The black hydrolysate separation and drying equipment according to claim 1, characterized in that: The inner surfaces of the two long side plates of the tipping bucket (11) are symmetrically provided with two sets of sliding grooves (12), and a push plate (13) is slidably arranged in the sliding groove (12). The push plate (13) is arranged on the upper side of the filter screen (4).

3. The black hydrolysate separation and drying equipment according to claim 2, characterized in that: A geared motor (14) is installed on the outer surface of the tipping bucket (11). A drive screw (17) is rotatably installed in each of the two upper sliding grooves (12). The drive screw (17) is threadedly connected to the screw hole on the sliding block side surface of the push plate (13). One end of each drive screw (17) extends out of the outer surface of the tipping bucket (11) and is connected to the synchronous pulley (15). A synchronous belt (16) is provided between the two synchronous pulleys (15). The other end of one of the drive screws (17) is connected to the output shaft of the geared motor (14) through a coupling.

4. The black hydrolysate separation and drying equipment according to claim 3, characterized in that: Fixed guide rods (18) are fixedly installed in the two slide grooves (12) on the lower side of the tipping bucket (11), and guide rod holes corresponding to the fixed guide rods (18) are opened on the slider side surface of the push plate (13) located in the lower slide groove (12).

5. A slurry residue black hydrolysate separation and drying device according to any one of claims 2-4, characterized in that: Two bellows (19) are provided in the groove (12). The two bellows (19) are respectively located on both sides of the push plate (13), and the bellows (19) are sleeved on the outside of the drive screw (17) and the fixed guide rod (18).

6. The black hydrolysate separation and drying equipment according to claim 2, characterized in that: The side surface of the tipping bucket (11) is provided with a distance sensor (21) for detecting the position of the push plate (13).

7. The black hydrolysate separation and drying equipment according to claim 2, characterized in that: The inner surface of the tipping bucket (11) is provided with several photoelectric sensors (20) for detecting the dried solid phase.

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