112 results about "Wastewater systems" patented technology

The invention discloses a phenol-cyanogen wastewater tail gas deodorization treatment process which comprises the following steps: firstly, intensively collecting tail gas through a system consisting of a sealing cover, a collecting pipeline and an induced draft fan aiming at normal-temperature odor containing ammonia gas, hydrogen sulfide and organic waste gas generated by structures such as an adjusting tank and a floatation tank in a phenol-cyanogen wastewater system of a coking plant; the chemical washing tower is used for removing alkaline substances and the like by using a phosphoric acid solution, the biological filter prewashing section is used for absorbing impurities and humidifying gas by using clear water, the biological section is used for degrading pollutants by using microorganisms, the activated carbon is used for adsorbing residual organic waste gas, and finally, the gas reaches the standard and is discharged through a chimney. The process can effectively reduce the concentration of each pollutant in the waste gas, improves the environment quality, provides treatment demonstration for the industry, and has remarkable environmental and economic benefits.

A wastewater system with high recyclability may include one or more mechanical or membrane filtration technologies. Process waste streams may be processed through a variety of processing units to remove contaminants without or with limited additional chemical additives, thereby forming a near-zero or zero liquid discharge wastewater system.

The utility model relates to the technical field of tail gas treatment in chemical production, in particular to a nitrogen and oxygen-containing tail gas treatment device which comprises an absorption tower, a water scrubber, a water tank, a liquid separation tank and an incinerator, the absorption tower is connected with a methanol pipeline and a tail gas pipeline, the water scrubber is connected with the absorption tower and the water tank, a tower kettle of the water scrubber is connected to a wastewater system, and the tower top of the water scrubber is connected with the liquid separation tank. The device has the following beneficial effects that the emission standard is reached, the process operation is simple, the switching is convenient, on one hand, residual propylene and methanol in the tail gas can be recovered, and the material loss is reduced; on the other hand, by-product low-temperature process condensate of the device can be used as washing liquid of the washing tower, energy is fully utilized, and waste water is reduced.

The invention discloses a method and equipment for generating a schematic diagram of a sewage and wastewater system, and a medium, and relates to the technical field of electric digital data processing. The method comprises the following steps: identifying a sewage and wastewater pipeline corresponding to a sewage and wastewater system in a three-dimensional model, and determining a pipeline type corresponding to the sewage and wastewater pipeline according to a topological relation of the sewage and wastewater pipeline; wherein the pipeline type comprises a vertical pipe main pipe, a transverse pipe main pipe and an appliance branch pipe; reading elevation information in a link model of the three-dimensional model, and generating elevation lines and elevation names corresponding to the elevation lines based on a base point selected by a user according to the elevation information; taking the first elevation line as a drawing starting point, and generating a pipeline graph line corresponding to each pipeline type; and generating an end equipment legend connected with the pipeline graph line at a preset position of the pipeline graph line, and carrying out pipe diameter labeling and stand pipe number labeling on the pipeline graph line to obtain a schematic diagram corresponding to the sewage and wastewater system.

The detection of candidate locations of water intake in a target basin of a wastewater system. This detection is done by performing computerized evaluation of hydrograph data sets that are each generated from sampling at a respective sample point of a target basin. Computerized pattern recognition is performed on the hydrograph data sets to identify one or more candidate locations of the target basin that are candidates for water intake. This identification is based on detection of characteristic patterns of water intake in the respective hydrograph data set. This allows for the automated detection of candidate locations of water intake in a target basin.

The utility model discloses a high-efficiency heat exchange device of a pure waste water system, and relates to the technical field of heat exchangers, the high-efficiency heat exchange device comprises a box body, heat exchange pipes and joint cavities, a plurality of heat exchange pipes are arranged in the box body, the joint cavities are arranged at the two ends of the box body, the corresponding joint cavities are communicated with the ends of the heat exchange pipes, and the joint cavities are further connected with corresponding water inlet / outlet pipes. The cleaning device is characterized in that a cleaning agent inflow assembly and a cleaning agent outflow assembly are arranged in connector cavities in the two ends of the box body respectively; the cleaning agent inflow assembly and the cleaning agent outflow assembly are respectively in driving connection with the corresponding action driving mechanisms; and the action driving mechanism can enable the cleaning agent inflow assembly, the heat exchange tube and the cleaning agent outflow assembly to be connected or disconnected. The heat exchange tube to be cleaned is switched under the condition that the heat exchange process is not affected, deposition of microorganisms and / or dirt in the heat exchange tube caused by a waste water heat medium is avoided, and the heat exchanger does not need to be disassembled frequently.

An embodiment of a system includes a pipeline of a wastewater system, an equalization tank that is configured to receive wastewater from the pipeline, and a return line extending from the equalization tank to the pipeline. In addition, the system includes an electricity generation assembly in fluid communication with the return line that is configured to generate electrical power using a flow of wastewater through the return line. The electricity generation assembly includes a flow channel, a water wheel that is partially inserted into the flow channel such that a portion of the water wheel is extended outside of the flow channel, and an electrical generator connected to the water wheel.

The embodiment of the application provides a desulfurization wastewater treatment system and method, and relates to the technical field of wastewater treatment. According to the desulfurization wastewater treatment system, a triple box assembly, a storage assembly, a feeding assembly, a pollution discharge assembly and a stirring assembly are included. The triple box assembly includes a purification box. The storage assembly is fixedly installed on the top and the front end of the purification box. The feeding assembly is arranged at the bottom of the purification box. The feeding assembly includes a driving member for power driving and a lead screw member for transmission. Through the transformation of the desulfurization wastewater system, the original desulfurization wastewater treatment system is changed into a triple box direct medicine supply, and a high-efficiency wastewater removal agent is used to replace the original medicine. After the system transformation, the heavy metal and COD content can be effectively removed, the desulfurization wastewater can be discharged up to the standard, the wastewater zero discharge can be realized, the wastewater purification efficiency is improved, and the cost input of the factory desulfurization wastewater is reduced.

Surface cleaning device, characterized in that it comprises: a cleaning base for contacting surfaces within an environment to be cleaned; a rechargeable battery to supply the surface cleaning device with operating energy; a vacuum source; a wastewater system that is fluidically connected to the vacuum source and includes a container for wastewater; a liquid detector positioned within the dirty water container, the liquid detector comprising an impeller assembly comprising a drive motor and an impeller rotated by the drive motor; and a control system connected to the impeller assembly for controlling the impeller assembly and for determining the fill level in the dirty water tank based on the current of the drive motor.

The invention discloses a composite microbial agent for degrading micro-plastics in seawater and a preparation method thereof, the microbial agent is composed of effective viable bacteria and auxiliary components, the effective viable bacteria are marine-derived halomonas, acinetobacter and bacillus and pseudomonas with high affinity with the micro-plastics, the effective viable bacteria are compounded according to a specific viable bacteria number ratio, and the microplastics are degraded by the auxiliary components. And function collaboration is realized. The auxiliary components comprise a protective agent consisting of trehalose, skimmed milk, glycerol and cane sugar, and a nutritional agent consisting of glucose and yeast extract. The preparation method comprises the following steps: respectively fermenting, centrifugally concentrating, compounding in proportion, mixing with auxiliary components, and finally drying to prepare powder. The invention further discloses application of the microbial inoculum to degradation of microplastics in beach intertidal zones and ship wastewater systems. The microbial agent is high in pertinence, good in stability in a high-salt seawater environment and high in degradation efficiency, and an effective solution is provided for in-situ bioremediation of marine micro-plastic pollution.

This utility model discloses a zero-discharge wastewater system for the tire industry, relating to the field of water treatment technology. The technical solution includes a first water treatment unit, a primary reverse osmosis unit, a primary reverse osmosis concentration unit, and a secondary reverse osmosis system for deep treatment. The first water treatment unit includes a raw water tank, a self-cleaning filter, an ultrafiltration system, and an ultrafiltration permeate buffer tank connected in sequence. The secondary reverse osmosis system for deep treatment treats the concentrated water from the second concentrated water tank using secondary reverse osmosis. By setting up a primary reverse osmosis unit, a primary reverse osmosis concentration unit, and a secondary reverse osmosis system for deep treatment, this application achieves high water utilization and low energy consumption requirements for the tire industry by treating the concentrated water from the second concentrated water tank using secondary reverse osmosis.

The invention relates to a micro-nano ozone oxidation high-salinity wastewater treatment system and a treatment method thereof. The system comprises an oxygen supply system, an ozone generator, a gas-liquid mixing pump, a wastewater system, a dissolved air tank, a micro-nano bubble generator and a catalytic reaction tank, the gas-liquid mixing pump mixes and pressurizes the salt-containing wastewater and ozone and then sends the mixture into the dissolved air tank, and the ozone reacts with the salt-containing wastewater in the dissolved air tank to remove COD in the wastewater; the mixed medium in the dissolved air tank passes through the micro-nano bubble generator to form micro-nano bubbles, the micro-nano bubbles enter the catalytic reaction tank, the catalytic filler reacts with the salt-containing wastewater to further remove COD in the wastewater, and produced water formed by the reaction in the catalytic reaction tank enters the produced water tank. Three modes of gas-liquid two-phase annular flow, gas-liquid mixing pump high-pressure dissolved gas and micro-nano bubble generator mechanical cutting are combined to form a micro-nano ozone oxidation system which is large in number, small in bubble average diameter, large in gas-liquid contact area and good in apparent mass transfer.

The application discloses a kind of dry treatment desulfurization wastewater system and process flow, high-temperature hot flue gas of boiler induced draft fan outlet is used, dust removal is entered into evaporator coil heat exchange to realize brine concentration, and cooperate with damper to realize temperature rise in evaporator and reach crystallization temperature requirement, by concentrated liquid direct injection high-temperature air duct to carry out vapor-solid separation, then into dryer to carry out gas-solid high-temperature cyclone separation.The application is more reasonable in arrangement, has lower maintenance cost, has wider applicability in finished product production, has higher economic benefit, especially avoids chloride crystalline salt pollution ash, so that ash and chloride crystalline salt can be collected and utilized separately.

The invention discloses a magnetic porous organic polymer material as well as preparation and adsorption application thereof, and belongs to the technical field of functional materials. The magnetic porous organic polymer material is prepared by adopting the processes of KH570 interface modification, construction of a porous network by vinyl aniline polymerization and gallic acid covalent grafting. A KH570 silanization interface layer is constructed on the surface of the Fe3O4 coated SiO2 magnetic core so as to enhance the organic-inorganic phase interface bonding force; a through mesoporous network is formed through vinyl aniline free radical polymerization, gallic acid is covalently grafted through diazotization reaction, high-density phenolic hydroxyl groups and a pi-pi conjugated structure are introduced, and multi-mechanism synergistic adsorption of fluorine ions and organic dye is achieved. Therefore, the functional limitation of a traditional azo reaction material is broken through, and a new scheme is provided for synchronous removal of multiple pollutants in a complex wastewater system.

The invention relates to the technical field of desulfurization wastewater zero discharge, and discloses a full-load desulfurization wastewater zero discharge system and method, and the system comprises an acquisition module which is used for constructing a first control parameter group, a second control parameter group and a third control parameter group of a unit full load, and carrying out the neural network training as training data, a corresponding control parameter prediction model is obtained; the generation module is used for acquiring a real-time load value and inputting the real-time load value into the control parameter prediction model to obtain a plurality of prediction control parameters and generate a desulfurization wastewater treatment instruction; the evaluation module is used for acquiring real-time monitoring parameters of the wastewater based on the monitoring time nodes and generating real-time operation evaluation values of the corresponding modules according to the real-time monitoring parameters; the optimization module is used for judging whether optimization is needed or not according to the real-time operation evaluation value, if yes, the control parameters to be optimized are screened out, an optimization instruction is generated, full-load desulfurization wastewater zero discharge of the desulfurization wastewater system is achieved, the wastewater discharge requirement is met, and environmental pollution is reduced.

The embodiment of the present invention discloses an energy-saving process for recycling high-salt wastewater containing COD and ammonia nitrogen into high-purity liquid ammonia or ammonia water. The present invention utilizes the volatility difference of COD-generating substances in the high-salt wastewater system to physically separate the COD in the ammonia nitrogen wastewater from the product, and recycle the ammonia nitrogen in the wastewater into high-purity liquid ammonia or ammonia water. At the same time, the steam circulation recovery process is coupled to the recovery process, which greatly saves the use of circulating water while reducing steam energy consumption, thereby achieving low energy consumption and high returns. The process flow is simple, the equipment investment cost is low, the operating cost is low, the operation is simple, the degree of automation is high, and the operation is stable.

The present invention discloses a visible light responsive photocatalyst capable of activating persulfate, and its preparation and application. The photocatalyst is added to a high-salt wastewater system containing antibiotic pollutants. After adsorption equilibrium is achieved in the dark under a water bath at 20-35°C, persulfate is added, and the antibiotic pollutants in the high-salt wastewater system are synergistically removed under visible light illumination. The photocatalyst is an Ag-doped asymmetric mesoporous TiO2 catalyst. The present invention deposits Ag inside the novel spirally stacked asymmetric TiO2 pores to obtain a composite catalyst with visible light response, and due to the Ti in the composite catalyst, the 3+ / Ti 4+ There is a coupling system that can effectively activate persulfate and utilize photocatalysis and persulfate activation to form abundant active groups such as photogenerated holes, sulfate radicals and hydroxyl radicals, which effectively improves the removal effect of the catalyst on ofloxacin antibiotics in the wastewater system.

The utility model discloses a peculiar smell control device of a laboratory wastewater system, and relates to the technical field of laboratory wastewater treatment. The peculiar smell control device of the laboratory wastewater system comprises a treatment box, an acid liquid storage cylinder and an alkaline liquid storage cylinder, a water inlet pipe is fixedly connected to the top of the treatment box, a supporting ring is fixedly connected to the inner surface of the treatment box, a supporting plate is arranged in a groove in the supporting ring, and balls are arranged on the inner surface of the groove of the supporting ring; a supporting frame is fixedly connected to the inner surface of the supporting plate, a water distribution plate is fixedly connected to the top of the supporting frame, a water pump, a pH meter and a water outlet pipe are arranged on the outer surface of the treatment box, a detection head is arranged on the outer surface of the pH meter, and the outer surfaces of the water outlet pipe and the detection head penetrate through the treatment box and extend into the inner cavity; according to the utility model, the peculiar smell in the wastewater can be fully treated, and the influence of excessive peculiar smell on human health is prevented.

The invention relates to a safety system (1) for a birthing pool device (100), the safety system comprising: an inlet unit (2); an outlet unit (12); a line system (3); a system separation device (4) for protecting against backflow into the drinking water supply system (101); a container device (5) for storing water; a sensor device (6) for detecting a water flow in the line system (3); a pump device (7) for conveying water from the container device (5) to the outlet unit (12); and a control device (10) for controlling the pump device (7) depending on a sensor signal from the sensor device (6). The control device (10) is suitable and designed for carrying out residual emptying by means of a safety device (8) depending on the water flow in the line system (3) detected by sensors and, for this purpose, for pumping the water out of the container device (5) and the second line region (23) into a waste water system (102) by means of the pump device (7).

This invention discloses an apparatus and method for reducing wastewater pressure fluctuations and extending equipment lifespan without interrupting production. The apparatus includes a wastewater end, with at least two sets of wastewater delivery pipelines and a tubular boiler delivery pipeline connected in parallel. A wastewater pump and a superheated water pump are respectively installed on the wastewater delivery pipelines and the tubular boiler delivery pipelines. Several branch pipelines are installed at the outlet end of the wastewater delivery pipelines, each branch pipeline equipped with a check valve. A bypass pipeline is installed between the wastewater delivery pipelines and the tubular boiler delivery pipelines, with a check valve on the bypass pipeline. The bypass pipeline is located between the wastewater pump and the superheated water pump. A PLC controller is electrically connected to a pressure tank, which is connected to the wastewater delivery pipelines via a pipeline. The outlet pressure of the superheated water pump is lower than the outlet pressure of the wastewater pump, forming a natural pressure relief channel to reduce the pressure within the wastewater system to a safe range.

The utility model relates to waste water system dosing block technical field, and disclose a device that prevents waste water system dosing block, including triplex box, the feeding port upper end of triplex box is provided with the clamping assembly that adds the fixed dosing feed pipe, be provided with the dosing assembly that adds the dosing to the waste water system on the clamping assembly, be provided with the air supply component that prevents the hot gas of triplex box to return to the channel on the dosing assembly, under the cooperation of screw, nut, blanking pipe, first arc clamp and second arc clamp, through the distance of adjusting blanking pipe and triplex box to reduce the influence of hot gas to blanking pipe, can also reduce the influence of hot gas to the upper end of blanking pipe with screw thread track, then open the valve on gasification air pipe, make the airflow pass through gasification air pipe and enter into blanking pipe, not only can increase the discharging rate still can push back hot gas, through the ball valve can carry out size adjustment to the air volume of gasification air pipe, satisfy the demand.

The invention provides a low-concentration waste water system of a ship laboratory, a low-concentration waste liquid collecting pool is arranged in the ship laboratory, and a water inlet end of a laboratory low-concentration waste water treatment device is connected with an outlet of the low-concentration waste liquid collecting pool through a pipeline; the water inlet end of the laboratory wastewater storage device is connected with the treated water outlet of the laboratory low-concentration wastewater treatment device through a pipeline; an inlet of the wastewater discharge pump is connected with an outlet of the laboratory wastewater storage device through a pipeline; the shore communicating device is connected with an outlet of the wastewater discharge pump; the movable storage tank is optionally connected to an outlet pipeline of the wastewater discharge pump; the ventilation devices are respectively arranged at the tops of the low-concentration waste liquid collecting tank, the laboratory low-concentration waste water treatment device and the laboratory waste water storage device, and are led above the deck through ventilation pipelines. According to the technical scheme, the problems of on-ship treatment, safe storage and compliant discharge of laboratory wastewater can be solved, and meanwhile, the operation convenience and environmental adaptability of the system are improved.

The invention discloses a catalyst for wastewater COD (Chemical Oxygen Demand) in-situ degradation and a preparation method of the catalyst, and belongs to the field of catalysts. A four-stage synergistic catalysis system of a metal phthalocyanine active matrix, a thiophene conjugated bridging chain, a cyclodextrin functional modification layer and a cross-linked network skeleton is adopted; the catalyst has the characteristics of controllable reaction path, designable product structure and efficient catalytic performance, a metal phthalocyanine compound matrix is used as a core active unit, a catalytic active center is formed through metal-nitrogen coordination, and a thienyl bridged ring structure is used as an electron transfer carrier, so that the catalytic activity of the catalyst is improved. A continuous electron channel for connecting a phthalocyanine active center and a cross-linked network is constructed through a conjugated system, electron migration is accelerated, a cyclodextrin functional modification layer serves as a performance optimization unit, and an adaptive bridge of the catalyst and a wastewater system is constructed through subject-object inclusion and hydrophilic modification, so that the performance of the catalyst is improved. Finally, a synergistic catalysis system with active center capable of efficiently generating active oxygen, conjugate bridging capable of guaranteeing electron transfer and cyclodextrin capable of optimizing application performance is formed.

The present invention relates to a process for treating ammonia-nitrogen-containing wastewater by utilizing a magnetic separation wastewater system. The magnetic separation wastewater system comprises a magnetic separation unit and is characterized in that the magnetic separation wastewater system further comprises an adsorption reaction unit, wherein the adsorption reaction unit comprises an adsorption reaction box, the adsorption reaction box is provided with an adsorption cavity, and the adsorption cavity is connected to the downstream magnetic separation unit. The process comprises: step S1, using a magnetic composite material with an ammonia-nitrogen adsorption function as a magnetic medium, inputting the magnetic medium and the wastewater together into the adsorption reaction unit, and achieving mixing of the magnetic medium and the wastewater in the adsorption cavity and completing adsorption of soluble ammonia-nitrogen in the wastewater; step S2, continuing to input the wastewater into the magnetic separation unit, continuing to treat the wastewater by utilizing a magnetic separation process, and at least removing insoluble pollutants in the wastewater; the process can simultaneously remove soluble ammonia-nitrogen and insoluble pollutants in the wastewater through a single magnetic separation process.

The embodiment of the invention discloses an energy-saving process for recycling high-purity liquid ammonia or ammonia water from high-salinity wastewater containing COD (Chemical Oxygen Demand) and ammonia nitrogen. According to the method, COD in the ammonia-nitrogen wastewater can be physically separated from a product by utilizing the volatility difference of substances generating COD in a high-salinity wastewater system, ammonia nitrogen in the wastewater is subjected to resource recovery in the form of high-purity liquid ammonia or ammonia water, meanwhile, a steam circulation recovery process is coupled in the recovery process, and the recovery efficiency is improved. And the steam energy consumption is reduced, the use of circulating water is greatly saved, and low energy consumption and high yield are realized. The process flow is simple, the equipment investment cost is low, the operation cost is low, the operation is simple, the automation degree is high and the operation is stable.

The invention provides a treatment method of papermaking chemimechanical pulp wastewater. The treatment method comprises the following steps: carrying out air flotation treatment on the papermaking chemimechanical pulp wastewater by using an air flotation machine, and adding a chemical agent into the air flotation machine; mixing the chemimechanical pulp wastewater subjected to air flotation treatment with paper machine wastewater according to a preset proportion; and adding a flocculating agent into the mixed wastewater for precipitation. According to the papermaking chemimechanical pulp wastewater treatment method provided by the embodiment of the invention, the air flotation treatment section is added before preliminary precipitation, the chemical agent is added in the air flotation treatment process to adsorb suspended substances in the chemimechanical pulp wastewater, and adsorbed floccules are discharged through the air flotation section, so that the phenomenon of'floating sludge 'does not occur any more when the adsorbed floccules are mixed with paper machine wastewater subsequently; further, a flocculating agent can be continuously added into the primary sedimentation tank for flocculation and sedimentation, and a subsequent treatment process is carried out; the treatment method can greatly reduce the treatment pressure of the wastewater system and improve the treatment effect of the wastewater treatment system.

The linear floor drain with a raised strainer and sediment retention capability serves as an inlet drain for various wastewater systems (domestic, public, and industrial). In this invention, by increasing the slope of the internal surface of the drain body, raising the strainer (in a cylindrical shape), and adding rings around the strainer to block its holes and create a temporary water reservoir, it aims—compared with existing drains—to maximize water flow into the wastewater pipe with a defined amount of residue, while preventing the entry of any solid materials and substances denser than water into the wastewater system.

Vacuum pump (1), in particular a self-priming vacuum pump (1), as a component of a vacuum wastewater system for emptying and flushing toilets, urinals and the like, with a collecting inlet line (3a) which is connected to an inlet (3b) in a housing (2) of the vacuum pump (1) and which is closed inside the housing (2) by a check valve (6) when the vacuum pump (1) is not in operation, optionally with a cutting device which is axially arranged and which comminutes solid substances in the wastewater, further comprising an axially arranged screw spindle which, when rotated, forms a water ring necessary for generating the vacuum and draws in the wastewater by means of vacuum, further comprising an outlet and a drive motor, characterized in that the vacuum pump (1) ▪ comprises a suction nozzle (4) arranged in the inlet (3b), which is configured such that the suction nozzle (4) is always in fluidic contact with an outer diameter (4b) of a water reserve (5); ▪ and the check valve (6) is arranged at an angle between 1° and 90° relative to a vertical axis of the inlet-suction port transition (7) and fully seals the suction port (4), wherein the suction port (4) is further arranged such that, in the event of a leak in the check valve (6), none of its inner diameters (4a) can come into fluidic contact with a level of the water reserve (5), and the suction nozzle (4) is arranged at a height to the water level that ensures a sufficient water reserve (5) for suction under all operating conditions.

The application discloses a method for repairing naphthalene contaminated wastewater based on microbial co-culture induced biological calcification, which comprises the following steps: step one, inoculating naphthalene contaminated wastewater with polycyclic aromatic hydrocarbon degrading bacteria and urea bacteria to obtain a repaired wastewater system; step two, oscillating the repaired wastewater system at 25-35 DEG C for 10-14 hours to obtain a co-cultured system; step three, adding urea and calcium chloride to the co-cultured system to obtain an induced system; and step four, oscillating the induced system at 25-35 DEG C for more than or equal to 24 hours to complete the repair of the naphthalene contaminated wastewater. The method has the characteristics of high naphthalene pollutant repair efficiency and strong stability of the repaired system.

Vacuum pump as part of a vacuum wastewater system for emptying and flushing toilets and urinals - with a collecting inlet line which is connected to an inlet (2) in a housing (1) of the vacuum pump and is closed inside the housing by a flap valve (12) when the vacuum pump is not in operation, - with a cutting device (4) which is axially arranged and which crushes solid substances in the wastewater, - with an axially arranged screw spindle (5) which, when rotated, forms a water ring (6) necessary for generating the vacuum and draws in the wastewater by means of vacuum, - with an outlet (7) and - with a drive motor (9) for the cutting device (4) and the screw spindle (5), characterized in that the inlet (2) is continued inside the housing (1) as a tubular channel (10) and the outlet opening (11) from the channel (10) can be closed by the flap valve (12), supported by gravity or part of the gravity of the flap (13) of the flap valve (12).