Kitchen slurry pretreatment system

Abstract

The utility model provides a kitchen slurry pretreatment system which comprises an adjusting tank, a communicated stacked screw filter press is arranged on one side of the adjusting tank, an efficient sedimentation tank, a cavitation air flotation machine and a dissolved air flotation machine which are communicated are sequentially arranged on one side of the stacked screw filter press, and a sludge temporary storage tank is arranged on one side of the stacked screw filter press. The efficient sedimentation tank, the cavitation air flotation machine and the dissolved air flotation machine are all communicated with the sludge temporary storage tank, and the sludge temporary storage tank is communicated with the stacked screw filter press. Kitchen slurry is firstly treated by the stacked screw filter press and the efficient sedimentation tank, so that the treatment effect of the cavitation air flotation machine and the dissolved air flotation machine can be improved, the air flotation machine is effectively prevented from being blocked, and the concentration of grease and suspended matters in pretreated effluent is greatly reduced. The cavitation air flotation machine is used for removing most small-specific-gravity suspended solids and grease in filtrate, and stable operation of the dissolved air flotation machine is ensured. And the dissolved air flotation machine is used for further removing residual small-specific-gravity suspended solids and grease to ensure the stability of a subsequent biochemical system.

Description

Technical Field

[0001] The utility model relates to the field of kitchen waste treatment, in particular to a pretreatment system for kitchen waste slurry. Background Technique

[0002] With the improvement of the living standards of Chinese residents, the generation amount of kitchen waste is increasing day by day. After the kitchen waste is processed through processes such as screening, crushing, steaming and oil extraction, kitchen waste slurry will be produced, which has a milky white and thick appearance and has significant characteristics such as high oil content, high suspended solid concentration and high organic pollutant concentration. Its oil content is 3000 - 5000mg / L, the suspended solid concentration can reach 50000 - 80000mg / L, and the COD concentration is as high as 80000 - 120000mg / L. In recent years, the treatment of kitchen waste slurry has gradually become a hot spot in the water treatment industry. However, due to the particularity of its water quality, the treatment difficulty is very high. One of the main reasons is that the concentrations of oil and suspended solids are too high. Without effective pretreatment, it will greatly affect the subsequent biochemical treatment. Too high suspended solid concentration may lead to poor sedimentation, affecting the operation and effect of the subsequent treatment system. High oil and high suspended solid concentrations may lead to an increase in microbial toxicity. Oil may cause blockage of pipelines and equipment, and high organic pollutant concentration may lead to a slowdown in the biochemical reaction rate, reducing the overall removal efficiency. Therefore, there is an urgent need for an efficient pretreatment system for kitchen waste slurry. For this reason, we propose a pretreatment system for kitchen waste slurry to solve the above problems. Content of the Utility Model

[0003] The utility model provides a pretreatment system for kitchen waste slurry, which solves the problems that the kitchen waste slurry has high oil content, high suspended solid concentration and high organic pollutant concentration. Without effective pretreatment, it may lead to poor sedimentation, an increase in microbial toxicity, blockage of pipelines and equipment or a slowdown in the biochemical reaction rate, reducing the overall removal efficiency.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is: a pretreatment system for kitchen waste slurry, including an adjustment tank, a spiral press filter is arranged on one side of the adjustment tank in a communicating way, a high-efficiency sedimentation tank, a cavitation flotation machine and a dissolved air flotation machine are sequentially arranged on one side of the spiral press filter in a communicating way, a sludge temporary storage tank is arranged on one side of the spiral press filter, the high-efficiency sedimentation tank, the cavitation flotation machine and the dissolved air flotation machine are all communicated with the sludge temporary storage tank, and the sludge temporary storage tank is communicated with the spiral press filter.

[0005] In a preferred scheme, a heat exchanger and an oil-water separator are sequentially arranged between the adjustment tank and the spiral press filter in a communicating way. The water outlet of the adjustment tank is connected to the water inlet of the heat exchanger, the water outlet of the heat exchanger is connected to the water inlet of the oil-water separator, and the water outlet of the oil-water separator is connected to the water inlet of the spiral press filter.

[0006] In a preferred embodiment, a submersible mixer is provided at the bottom of the regulating tank, a slurry lift pump is provided at the top of the regulating tank, and the regulating tank is communicated with the heat exchanger through the slurry lift pump.

[0007] In a preferred embodiment, a filtrate temporary storage tank is provided between the spiral filter press and the high-efficiency sedimentation tank. A filtrate lift pump and a chemical dosing box are provided at the top of the high-efficiency sedimentation tank. The filtrate temporary storage tank is communicated with the high-efficiency sedimentation tank through the filtrate lift pump, and the high-efficiency sedimentation tank is communicated with the chemical dosing box.

[0008] In a preferred embodiment, a sludge lift pump is provided at the top of the sludge temporary storage tank, and the sludge temporary storage tank is communicated with the spiral filter press through the sludge lift pump.

[0009] In a preferred embodiment, the spiral filter press includes a filter body, two chemical dosing devices are provided on the filter body, a chemical receiving device is provided at the bottom of the chemical dosing device, and a spraying device is provided on one side of the chemical receiving device.

[0010] In a preferred embodiment, the chemical dosing device includes a chemical dosing port. A driven gear is rotatably connected to the bottom of the chemical dosing port pipeline. An arc-shaped baffle is provided on the driven gear. An arc-shaped notch is provided at the bottom of the chemical dosing port pipeline. The heights of the two driven gears are different. A rotating shaft is provided between the two chemical dosing ports. A main gear is provided at the bottom of the rotating shaft. A spring is provided between the rotating shaft and the filter body. A first electromagnetic flowmeter is provided on the chemical dosing port pipeline.

[0011] In a preferred embodiment, a first pipeline and a second pipeline are provided at the top of the filter body. The mixing mechanism includes a stirring shaft and a stirring motor. The stirring motor is installed on the filter body. The spiral filter press is communicated with the oil-water separator through the first pipeline, and the spiral filter press is communicated with the sludge temporary storage tank through the second pipeline.

[0012] In a preferred embodiment, the chemical receiving device includes a box plate, a hinged plate is provided on the box plate, a cylinder is provided on one side of the box plate, and one end of the cylinder is rotatably connected to the hinged plate through a hinge seat.

[0013] The beneficial effects of the present utility model are as follows: The kitchen waste slurry is first treated by the "spiral filter press plus high-efficiency sedimentation tank", which can improve the treatment effect of the "eddy current air flotation machine plus dissolved air flotation machine", effectively avoid the blockage of the air flotation machine, and greatly reduce the concentration of oil and suspended solids in the pretreated effluent. The eddy current air flotation machine is used to remove most of the small specific gravity suspended solids and oil in the filtrate to ensure the stable operation of the dissolved air flotation machine. The dissolved air flotation machine is used to further remove the remaining small specific gravity suspended solids and oil to ensure the stability of the subsequent biochemical system. Through the combined process of this pretreatment system, the load of subsequent advanced treatment is reduced, and the stability of the subsequent treatment system is greatly improved.

[0014] Two chemical dosing devices are respectively filled with flocculant and coagulant aid inside. The first electromagnetic flowmeter precisely controls the poured flocculant and coagulant aid, so that the flocculant and coagulant aid are mixed in the chemical receiving device. At the same time, the spraying device rinses the flocculant and coagulant aid, so that after they are fully mixed, they are added to the mixing mechanism. Full mixing can improve the flocculation effect and promote the combination and sedimentation of solid particles. The dosages of the flocculant and coagulant aid can be precisely controlled by a rotating shaft, and at the same time, the dosage can be increased into the spiral press filter at any time, which is convenient and fast, and avoids the phenomenon that the flocculant and coagulant aid do not have a good effect due to insufficient mixing. It has great popularization value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0016] Figure 1 is the front view of the overall structure of the present utility model;

[0017] Figure 2 is the sectional side view of the spiral press filter of the present utility model;

[0018] Figure 3 is the present utility model Figure 2 the enlarged view of A therein;

[0019] Figure 4 is the top view of the driven gear of the present utility model;

[0020] Figure 5 is the front view of the partial structure of the present utility model;

[0021] Figure 6 is the process schematic diagram of the present utility model;

[0022] In the figure: regulating tank 1; submersible agitator 101; slurry lift pump 102; heat exchanger 2; oil-water separator 3; spiral press filter 4; filter body 401; chemical dosing device 402; chemical dosing port 4021; main gear 4022; driven gear 4023; spring 4024; rotating shaft 4025; baffle 4026; chemical receiving device 403; box board 4031; hinged plate 4032; cylinder 4033; spraying device 404; mixing mechanism 405; first pipeline 406; second pipeline 407; first electromagnetic flowmeter 408; filtrate temporary storage tank 5; filtrate lift pump 501; high-efficiency sedimentation tank 6; chemical dosing box 601; vortex air flotation machine 7; dissolved air flotation machine 8; sludge temporary storage tank 9; sludge lift pump 901. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Embodiment 1:

[0024] As Figures 1-6In a kitchen waste slurry pretreatment system, there is an adjustment tank 1. On one side of the adjustment tank 1, there is a connected spiral press filter 4. On one side of the spiral press filter 4, there are successively connected a high-efficiency sedimentation tank 6, a cavitation flotation machine 7, and a dissolved air flotation machine 8. On one side of the spiral press filter 4, there is a sludge temporary storage tank 9. The high-efficiency sedimentation tank 6, the cavitation flotation machine 7, and the dissolved air flotation machine 8 are all connected to the sludge temporary storage tank 9, and the sludge temporary storage tank 9 is connected to the spiral press filter 4. With this structure, the oil-water separator 3 is used to remove most of the grease in the kitchen waste slurry, and the oil-water separator 3 reduces the workload of manual oil removal.

[0025] The filtrate temporary storage tank 5 is used to temporarily store the filtrate discharged from the spiral press filter 4, and the filtrate lift pump 501 lifts the filtrate to the high-efficiency sedimentation tank 6. The high-efficiency sedimentation tank 6 is used to remove large-specific gravity suspended solids in the filtrate, and the chemical dosing box 601 is used to add liquid caustic soda to adjust the pH of the filtrate to neutral.

[0026] The cavitation flotation machine 7 is used to remove most of the small-specific gravity suspended solids and grease in the filtrate to ensure the stable operation of the dissolved air flotation machine 8. The dissolved air flotation machine 8 is used to further remove the remaining small-specific gravity suspended solids and grease to ensure the stability of the subsequent biochemical system. The sludge or scum of the high-efficiency sedimentation tank 6, the cavitation flotation machine 7, and the dissolved air flotation machine 8 are discharged into the sludge temporary storage tank 9. The sludge lift pump 901 of the sludge temporary storage tank 9 lifts the sludge to the spiral press filter 4 for dehydration treatment together with the kitchen waste slurry.

[0027] In two chemical dosing devices 402, a flocculant and a coagulant aid are respectively placed. When the flocculant is to be put into the spiral press filter 4, the rotating shaft 4025 is pressed so that the rotating shaft 4025 meshes with the first driven gear 4023, and the rotating shaft 4025 is rotated. The flocculant in the first chemical dosing device 402 is poured into the chemical receiving device 403. When the coagulant aid is to be put into the spiral press filter 4, the rotating shaft 4025 is continuously pressed so that the rotating shaft 4025 meshes with the second driven gear 4023, and the rotating shaft 4025 is rotated. The coagulant aid in the second chemical dosing device 402 is poured into the chemical receiving device 403. The first electromagnetic flowmeter 408 precisely controls the poured flocculant and coagulant aid so that the flocculant and the coagulant aid are mixed in the chemical receiving device 403. At the same time, the spraying device 404 flushes the flocculant and the coagulant aid so that they are fully mixed before being added to the mixing mechanism 405. Full mixing can improve the flocculation effect and promote the combination and sedimentation of solid particles. The dosages of the flocculant and the coagulant aid can be precisely controlled by one rotating shaft 4025, and the dosage can be increased into the spiral press filter 4 at any time, which is convenient and fast, and avoids the phenomenon that the flocculant and the coagulant aid do not have a good effect due to insufficient mixing.

[0028] In a preferred embodiment, a heat exchanger 2 and an oil-water separator 3 are sequentially arranged in communication between the regulating tank 1 and the spiral press filter 4. The water outlet of the regulating tank 1 is connected to the water inlet of the heat exchanger 2, the water outlet of the heat exchanger 2 is connected to the water inlet of the oil-water separator 3, and the water outlet of the oil-water separator 3 is connected to the water inlet of the spiral press filter 4. With this structure, temperature detectors are provided at the water inlet and outlet of the heat exchanger 2 for monitoring the real-time temperature of the slurry before and after heat exchange.

[0029] In a preferred embodiment, a submersible agitator 101 is provided at the bottom of the regulating tank 1, and a slurry lift pump 102 is provided at the top of the regulating tank 1. The regulating tank 1 is in communication with the heat exchanger 2 through the slurry lift pump 102. With this structure, the submersible agitator 101 is used to homogenize and equalize the kitchen waste slurry, and the slurry lift pump 102 lifts the homogenized and equalized kitchen waste slurry to the heat exchanger 2.

[0030] The heat exchanger 2 is used to cool the kitchen waste slurry and reduce the slurry temperature to 35 - 40 °C. The heat exchanger 2 adopts a plate heat exchanger, which is convenient for disassembly and cleaning after fouling. The plate is made of titanium material to increase the acid and corrosion resistance of the equipment.

[0031] In a preferred embodiment, a filtrate storage tank 5 is arranged between the spiral press filter 4 and the high-efficiency sedimentation tank 6. A filtrate lift pump 501 and a chemical dosing tank 601 are provided at the top of the high-efficiency sedimentation tank 6. The filtrate storage tank 5 is in communication with the high-efficiency sedimentation tank 6 through the filtrate lift pump 501, and the high-efficiency sedimentation tank 6 is in communication with the chemical dosing tank 601. With this structure, the filtrate storage tank 5 is used to store the filtrate discharged from the spiral press filter 4, and the filtrate lift pump 501 lifts the filtrate to the high-efficiency sedimentation tank 6. The high-efficiency sedimentation tank 6 is used to remove large specific gravity suspended solids in the filtrate, and the chemical dosing tank 601 is used to add liquid caustic soda to adjust the pH of the filtrate to neutral.

[0032] A first pH detector and a second pH detector are respectively provided in the regulating tank 1 and the high-efficiency sedimentation tank 6. The first pH detector is used to monitor the pH of the homogenized and equalized kitchen waste slurry in the regulating tank 1, and the second pH detector is used to monitor the pH after alkali addition adjustment in the high-efficiency sedimentation tank 6.

[0033] The signal input of the chemical dosing tank 601 is electrically connected to the signal output of the second pH detector to accurately control the liquid caustic soda dosage. Second electromagnetic flowmeters are provided on the outlet pipes of the slurry lift pump 102, the filtrate lift pump 501 and the sludge lift pump 901 to facilitate flow regulation.

[0034] In the preferred embodiment, a sludge lift pump 901 is installed at the top of the sludge holding tank 9, connecting the sludge holding tank 9 to the screw filter press 4 via the sludge lift pump 901. With this structure, the vortex air flotation machine 7 is used to remove most of the low-density suspended matter and grease in the filtrate, ensuring the stable operation of the dissolved air flotation machine 8. The dissolved air flotation machine 8 is used to further remove the remaining low-density suspended matter and grease, ensuring the stability of the subsequent biochemical system. The sludge or scum from the high-efficiency sedimentation tank 6, the vortex air flotation machine 7, and the dissolved air flotation machine 8 is discharged into the sludge holding tank 9. The sludge lift pump 901 in the sludge holding tank 9 lifts the sludge to the screw filter press 4 for dehydration along with the food slurry.

[0035] In a preferred embodiment, the screw filter press 4 includes a filter body 401, on which two dosing devices 402 are provided. A drug receiving device 403 is provided at the bottom of the dosing device 402, and a spraying device 404 is provided on one side of the drug receiving device 403. With this structure, flocculants and coagulants are placed inside the two dosing devices 402, respectively. When flocculants are to be added to the screw filter press 4, the rotating shaft 4025 is pressed to engage the rotating shaft 4025 with the first slave gear 4023. The rotating shaft 4025 is rotated, and the flocculants in the first dosing device 402 are poured into the drug receiving device 403. When coagulants are to be added to the screw filter press 4, the rotating shaft 4025 is pressed again to engage the rotating shaft 4025 with the second slave gear 4023. 023 engages, rotating shaft 4025 rotates, and the coagulant from the second dosing device 402 is poured into the drug receiving device 403. The first electromagnetic flowmeter 408 precisely controls the poured flocculant and coagulant to ensure mixing in the drug receiving device 403. Simultaneously, the spraying device 404 rinses the flocculant and coagulant to ensure they are fully mixed before being added to the mixing mechanism 405. This thorough mixing improves the flocculation effect and promotes the binding and sedimentation of solid particles. The dosage of flocculant and coagulant can be precisely controlled by a single rotating shaft 4025, and the dosage can be added to the screw filter press 4 at any time, which is convenient and quick, avoiding the problem of insufficient mixing of flocculant and coagulant, which can lead to poor effect.

[0036] Later, the medicine receiving device 403 is opened to allow the mixed flocculant and coagulant to enter the screw filter press 4 , and the spraying device 404 is opened again to clean the medicine receiving device 403 .

[0037] In a preferred solution, the chemical dosing device 402 includes a chemical dosing port 4021. At the bottom of the pipeline of the chemical dosing port 4021, there is a driven gear 4023 rotatably connected. An arc-shaped baffle 4026 is provided on the driven gear 4023. An arc-shaped notch is provided at the bottom of the pipeline of the chemical dosing port 4021. The two driven gears 4023 are at different heights. A rotating shaft 4025 is provided between the two chemical dosing ports 4021. A main gear 4022 is provided at the bottom of the rotating shaft 4025. A spring 4024 is provided between the rotating shaft 4025 and the filter body 401. A first electromagnetic flowmeter 408 is provided on the pipeline of the chemical dosing port 4021. With this structure, when the rotating shaft 4025 meshes with the driven gear 4023, rotate the rotating shaft 4025 so that the arc-shaped notch at the bottom of the pipeline of the chemical dosing port 4021 is not aligned with the arc-shaped baffle 4026 on the driven gear 4023, so that the pipeline of the chemical dosing port 4021 is opened, so that the chemical agent falls into the chemical receiving device 403, and the coagulant aid of the second chemical dosing device 402 is poured into the chemical receiving device 403.

[0038] In a preferred solution, a first pipeline 406 and a second pipeline 407 are provided at the top of the filter body 401. The mixing mechanism 405 includes a stirring shaft and a stirring motor. The stirring motor is installed on the filter body 401. The spiral filter press 4 is communicated with the oil-water separator 3 through the first pipeline 406, and the spiral filter press 4 is communicated with the sludge storage tank 9 through the second pipeline 407.

[0039] In a preferred solution, the chemical receiving device 403 includes a box board 4031. A hinged board 4032 is provided on the box board 4031. A cylinder 4033 is provided on one side of the box board 4031. One end of the cylinder 4033 is rotatably connected to the hinged board 4032 through a hinge seat. With this structure, drive the cylinder 4033 to open the chemical receiving device 403, so that the mixed flocculant and coagulant aid enter the spiral filter press 4, and then turn on the spraying device 404 again, so that the spraying device 404 cleans the chemical receiving device 403. The spraying device 404 includes a spray head and a spray pipe. The spray pipe is communicated with the water tank through a water pump. The water tank is installed on the top of the spiral filter press 4.

[0040] Embodiment 2:

[0041] Further described in combination with Embodiment 1: Working principle: The kitchen waste slurry first enters the regulation tank 1 for homogenization and equalization, then the temperature of the slurry is reduced by the heat exchanger 2, and then enters the oil-water separator 3 to remove most of the oil in the slurry. The effluent of the oil-water separator 3 then enters the spiral filter press 4 to remove most of the suspended solids. The filtrate flows by gravity to the filtrate storage tank 5, and then enters the high-efficiency sedimentation tank 6 to remove the suspended solids with large specific gravity in the filtrate. The effluent of the high-efficiency sedimentation tank 6 enters the vortex air flotation machine 7 to remove the suspended solids with small specific gravity and part of the oil, and then further removes the remaining suspended solids with small specific gravity and oil through the dissolved air flotation machine 8. The effluent of the dissolved air flotation machine 8 goes to the subsequent advanced treatment unit.

[0042] The above embodiments are only the preferred technical solutions of the present utility model and should not be regarded as limitations to the present utility model. The protection scope of the present utility model shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present utility model.

Claims

1. A pretreatment system for kitchen and dining waste slurry, characterized in that: It includes an adjustment tank (1). A connected spiral press filter (4) is provided on one side of the adjustment tank (1). On one side of the spiral press filter (4), there are successively a connected high-efficiency sedimentation tank (6), a vortex air flotation machine (7), and a dissolved air flotation machine (8). A sludge temporary storage tank (9) is provided on one side of the spiral press filter (4). The high-efficiency sedimentation tank (6), the vortex air flotation machine (7), and the dissolved air flotation machine (8) are all connected to the sludge temporary storage tank (9), and the sludge temporary storage tank (9) is connected to the spiral press filter (4).

2. The pretreatment system for kitchen and restaurant slurry according to claim 1, wherein: Between the adjustment tank (1) and the spiral press filter (4), there are successively a connected heat exchanger (2) and an oil-water separator (3). The water outlet of the adjustment tank (1) is connected to the water inlet of the heat exchanger (2). The water outlet of the heat exchanger (2) is connected to the water inlet of the oil-water separator (3). The water outlet of the oil-water separator (3) is connected to the water inlet of the spiral press filter (4).

3. The pretreatment system for kitchen waste slurry according to claim 1, characterized in that: A submersible agitator (101) is provided at the bottom of the adjustment tank (1). A slurry lift pump (102) is provided at the top of the adjustment tank (1). The adjustment tank (1) is connected to the heat exchanger (2) through the slurry lift pump (102).

4. The pretreatment system for kitchen waste slurry according to claim 1, wherein: A filtrate temporary storage tank (5) is provided between the spiral press filter (4) and the high-efficiency sedimentation tank (6). A filtrate lift pump (501) and a chemical dosing box body (601) are provided at the top of the high-efficiency sedimentation tank (6). The filtrate temporary storage tank (5) is connected to the high-efficiency sedimentation tank (6) through the filtrate lift pump (501), and the high-efficiency sedimentation tank (6) is connected to the chemical dosing box body (601).

5. The pretreatment system for kitchen waste slurry according to claim 1, wherein: A sludge lift pump (901) is provided at the top of the sludge temporary storage tank (9). The sludge temporary storage tank (9) is connected to the spiral press filter (4) through the sludge lift pump (901).

6. The pretreatment system for kitchen waste slurry according to claim 1, wherein: The spiral press filter (4) includes a filter body (401). There are two chemical dosing devices (402) on the filter body (401). A chemical receiving device (403) is provided at the bottom of the chemical dosing device (402). A spraying device (404) is provided on one side of the chemical receiving device (403).

7. The pretreatment system for kitchen waste slurry according to claim 6, characterized in that: The chemical dosing device (402) includes a chemical dosing port (4021). A driven gear (4023) connected by rotation is provided at the bottom of the pipeline of the chemical dosing port (4021). An arc-shaped baffle (4026) is provided on the driven gear (4023). An arc-shaped notch is provided at the bottom of the pipeline of the chemical dosing port (4021). The heights of the two driven gears (4023) are different. A rotating shaft (4025) is provided between the two chemical dosing ports (4021). A main gear (4022) is provided at the bottom of the rotating shaft (4025). A spring (4024) is provided between the rotating shaft (4025) and the filter body (401). A first electromagnetic flowmeter (408) is provided on the pipeline of the chemical dosing port (4021).

8. The pretreatment system for kitchen waste slurry according to claim 6, wherein: A first pipeline (406) and a second pipeline (407) are provided at the top of the filter body (401). The mixing mechanism (405) includes a stirring shaft and a stirring motor. The stirring motor is installed on the filter body (401). The spiral press filter (4) is connected to the oil-water separator (3) through the first pipeline (406), and the spiral press filter (4) is connected to the sludge temporary storage tank (9) through the second pipeline (407).

9. The pretreatment system for kitchen waste slurry according to claim 6, wherein: connect The medicine device (403) includes a box panel (4031), on which a hinge plate (4032) is provided. On one side of the box panel (4031), a cylinder (4033) is provided, and one end of the cylinder (4033) is rotatably connected to the hinge plate (4032) through a hinge seat.

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