CN219036591U - Steam generator for biohazard waste treatment equipment - Google Patents

Abstract

The present utility model relates to a steam generator for a biohazard waste treatment facility. The steam generator includes: the novel steam box comprises a box body (1), wherein a manual air exhaust ball valve hole (2), a temperature sensor hole (3), a liquid level meter hole (4), a safe pressure relief valve hole (5), a pressure switch, a pressure meter hole (6), a steam outlet (7), an electric heating pipe (8), a sewage outlet (9), a preformed hole (10) and a water supply hole (11) are formed in the box body (1). The utility model has compact volume, high temperature control precision, small temperature difference and small temperature fluctuation, and can be used for the steam generating device of the biohazard waste treatment equipment, thereby effectively reducing the cost of a sterilization system, simplifying the system structure, reducing the heat loss and improving the energy utilization rate.

Description

Steam generator for biohazard waste treatment equipment

Technical Field

The utility model relates to the technical field of biohazard waste treatment, in particular to a steam generator for biohazard waste treatment equipment.

Background

Medical waste is mainly treated in a centralized manner in the fields of biological laboratories, hospitals, animal research institutes and the like. Centralized processing involves processes such as transfer storage, increasing security risks. Thus, the steam generation system is used in combination with an integrated disruption system and sterilization chamber to reduce the biohazard risk of biohazard waste treatment.

The most common heat source for high temperature sterilization is high temperature steam, and the most common way to generate high temperature steam is electrical heating. The steam generator of the desk-top steam sterilizer on the market at present adopts two aluminum alloy about generally, by drawing aluminum alloy embryo, through machining center processing, two aluminum alloy about by twenty more screw fixation, form complicated steam pipeline, and install rubber seal between two aluminum alloy about and seal, this kind of steam generator rubber seal works at high temperature for a long time, it is easy to age, produce steam leakage, work at high temperature for a long time, aluminum alloy can produce the deformation, the deformation of two aluminum alloy about making can't paste tightly, steam can not pass along given steam pipeline, can pass along the gap between the aluminum alloy about, the water is just gasified completely, the quality of vapor descends.

In the prior art, CN210035443U discloses an integral steam generator, which has the defects of light weight and large volume, wastes energy and is inconvenient to be assembled with sterilization equipment into a whole for use, and the safety protection is slightly insufficient. The small evaporator disclosed in CN210354311U has the disadvantages of slightly slow temperature rise and large temperature deviation,

how to overcome the defects of the prior art scheme, how to provide a steam generating device which has compact volume, high temperature control precision, small temperature difference and small temperature fluctuation and can be used for biohazard waste treatment equipment, thereby effectively reducing the cost of a sterilization system, simplifying the structure of the system, reducing heat loss and improving the utilization rate of energy sources, and becoming the problem to be solved urgently in the technical field.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a steam generator for biohazard waste treatment equipment, which adopts the following technical scheme:

a steam generator for a biohazard waste treatment facility, the steam generator comprising: the box body is provided with a manual exhaust ball valve hole, a temperature sensor hole, a liquid level meter hole, a safe pressure relief valve hole, a pressure switch, a pressure meter hole, a steam outlet, an electric heating pipe, a sewage outlet, a reserved hole and a water supply hole (11);

the manual exhaust ball valve hole, the temperature sensor hole, the liquid level meter hole, the safety pressure relief valve hole, the pressure switch, the pressure meter hole and the steam outlet are arranged at the top of the box body;

the sewage outlet, the reserved hole and the water supply hole are arranged at the bottom of the box body;

the heating main body of the electric heating pipe is arranged inside the box body, and the electric connecting part of the electric heating pipe is arranged on the left side surface of the box body.

Further, the box body comprises a pressure container, a heat-insulating shell and heat-insulating cotton; the pressure container is arranged inside the heat-insulating shell, and the heat-insulating cotton is filled between the pressure container and the heat-insulating shell; the pressure vessel comprises a first end plate, a second end plate and a guard plate; the heat preservation shell comprises a first heat preservation Wen Duanban, a second heat preservation end plate, a heat preservation bottom plate and a heat preservation guard plate.

Further, the first end plate and the second end plate are hemispherical shells; the guard plate is a cylindrical shell; the first end plate and the second end plate are welded at two ends of the guard plate respectively to form the pressure container.

Further, the first heat preservation end plate Wen Duanban and the second heat preservation end plate are flat plates with semicircular upper parts and rectangular lower parts; the heat-insulating bottom plate is a rectangular flat plate; the heat-insulating guard plate is a rectangular flat plate with a U-shaped bending section; the first heat preservation Wen Duanban and the second heat preservation end plate are riveted at two ends of the heat preservation guard plate, the heat preservation bottom plate is riveted at the bottoms of the first heat preservation Wen Duanban, the second heat preservation end plate and the heat preservation guard plate, and the heat preservation shell with the upper part being a semi-cylinder and the lower part being a cuboid is formed.

Further, the diameter of the upper semi-cylinder of the heat-insulating shell is 578mm, and the height of the heat-insulating shell is 824mm.

Further, the first end plate, the second end plate, the guard plate, the first protection Wen Duanban, the second heat preservation end plate, the heat preservation bottom plate and the heat preservation guard plate are all made of stainless steel.

Further, the electric heating pipe comprises a U-shaped heating main body, and the heating main body is arranged inside the pressure container; the number of the electric heating pipes is 9, the electric heating pipes are arranged in 3 rows from top to bottom, the first row of electric heating pipes are horizontally arranged in parallel on the upper side, the second row of electric heating pipes are horizontally arranged in parallel on the middle side, the third row of electric heating pipes are horizontally arranged in parallel on the lower side, and the electric heating pipes are horizontally arranged in 2.

Further, the manual exhaust ball valve hole is provided with a manual exhaust ball valve; the temperature sensor hole is provided with a temperature sensor; the liquid level meter hole is provided with a liquid level meter; the safety pressure relief valve hole is provided with a safety pressure relief valve; the pressure switch and the pressure gauge hole are provided with the pressure switch and the pressure gauge; the sewage outlet is connected with a sewage valve; the water supply hole is connected with a water supply pump.

Further, the safety relief valve is an adjustable automatic relief valve, and a silencing device is arranged at an air outlet of the adjustable automatic relief valve.

Further, the stainless steel tee joint is installed in pressure switch and manometer hole, stainless steel tee joint's first passageway is connected the box, the pressure switch is connected to the second passageway, and the manometer is connected through the trachea to the third passageway.

The technical scheme of the utility model has the following beneficial effects: the steam generator has compact external dimension, can be installed along with equipment, occupies small space and improves the space utilization rate. The electric heating pipes of 9 KW-9 groups are adopted for direct heating, the heating power is high, the working requirement temperature can be quickly reached, the time of a heat engine is saved, the working efficiency is improved, the volume is small, the working temperature is quickly reached to 134 ℃, and the heat preservation process can be completed by grouping control of the electric heating pipes. The automatic water supplementing and automatic temperature control can be realized, pressure and temperature safety protection measures are provided, personnel intervention can be reduced, and the risk of personnel being infected is avoided.

Drawings

Fig. 1 is a schematic structural view of a steam generator according to the present utility model.

Fig. 2 is a front view of the present biohazard waste treatment facility.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model. It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof. The terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "inner" are used in conjunction with the following terms,

The orientation or positional relationship indicated by "external" or the like is based on the orientation or positional relationship shown in the drawings for convenience of description only, and is not indicative or implying that the apparatus or elements in question must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present utility model.

As shown in fig. 1, the steam generator for a biohazard waste treatment apparatus of the present utility model includes: the box 1, be equipped with manual exhaust ball valve opening 2, temperature sensor hole 3, level gauge hole 4, safe pressure release valve opening 5, pressure switch and manometer hole 6, steam outlet 7, electric heating pipe 8, blowdown export 9, preformed hole 10, water supply hole 11 on the box 1.

The manual exhaust ball valve hole 2, the temperature sensor hole 3, the liquid level meter hole 4, the safety pressure relief valve hole 5, the pressure switch, the pressure gauge hole 6 and the steam outlet 7 are arranged at the top of the box body 1.

The sewage outlet 9, the reserved hole 10 and the water supply hole 11 are arranged at the bottom of the box body 1.

The manual exhaust balloon valve hole 2, the temperature sensor hole 3, the liquid level meter hole 4, the safety pressure relief valve hole 5, the pressure switch, the pressure gauge hole 6 and the steam outlet 7 are sequentially arranged at the top of the steam generator from right to left. The blowdown outlet 9, the reserved hole 10 and the water supply hole 11 are sequentially arranged from right to left at the bottom of the steam generator.

The heating body of the electric heating pipe 8 is arranged inside the box body, and the electric connection part of the electric heating pipe 8 is arranged on the left side surface of the box body 1.

The box body 1 comprises a pressure container, a heat-preserving shell and heat-preserving cotton. The pressure container is arranged inside the heat-insulating shell, the heat-insulating cotton is filled between the pressure container and the heat-insulating shell, and heat loss is reduced by filling the heat-insulating shell with heat-insulating materials. The pressure vessel comprises a first end plate, a second end plate and a guard plate; the heat preservation shell comprises a first heat preservation Wen Duanban, a second heat preservation end plate, a heat preservation bottom plate and a heat preservation guard plate.

The first end plate and the second end plate are hemispherical shells. The guard plate is a cylindrical shell; the first end plate and the second end plate are welded at two ends of the guard plate respectively to form the pressure container.

The first heat preservation end plate Wen Duanban and the second heat preservation end plate are flat plates with semicircular upper parts and rectangular lower parts; the heat preservation bottom plate is a rectangular flat plate. The heat-insulating guard plate is a rectangular flat plate with a U-shaped bending section; the first heat preservation Wen Duanban and the second heat preservation end plate are riveted at two ends of the heat preservation guard plate, the heat preservation bottom plate is riveted at the bottoms of the first heat preservation Wen Duanban, the second heat preservation end plate and the heat preservation guard plate, and the heat preservation shell with the upper part being a semi-cylinder and the lower part being a cuboid is formed. The fully-enclosed heat-insulating structure reduces heat loss and saves energy.

The upper semi-cylinder diameter of the heat preservation shell is 578mm, the height of the heat preservation shell is 824mm, the design volume is 0.126m, and the heat preservation shell is small and convenient to assemble.

The first end plate, the second end plate, the guard plate, the first protection Wen Duanban, the second heat-insulating end plate, the heat-insulating bottom plate and the heat-insulating guard plate are made of stainless steel, are fireproof, heat-resistant and corrosion-resistant, can resist scaling and maintain strength at high temperature, are convenient to clean, firm and durable, the whole longitudinal and circumferential seams of the tank body of the water tank are welded on two sides by adopting welding rod arc welding, the connecting pipe is welded on a flat welding flange fillet weld, the connecting pipe is welded on a shell fillet weld, and a welding rod arc welding method is selected. The water tank 1 can also comprise a support, the welding fillet weld of the support and the shell of the heat-insulating shell belongs to a non-pressure-bearing weld, and the welding seam is formed well by adopting consumable electrode gas shielded welding. The bracket of the box body 1 and the heat preservation bottom plate are fixed on the equipment mounting bracket by using the opposite-penetrating bolts, so that the stable displacement-free shaking phenomenon is ensured.

The second heat preservation end plate, the heat preservation bottom plate and the heat preservation guard plate are assembled by adopting a riveting process, so that the box body can be conveniently detected and maintained.

The electric heating pipe 8 comprises a U-shaped heating main body, and the heating main body is arranged inside the pressure container; the number of the electric heating pipes 8 is 9, the power of each electric heating pipe 8 is 9kw, the electric heating pipes 8 are arranged in 3 rows from top to bottom, the upper first row of electric heating pipes 8 are horizontally arranged in parallel, the middle second row of electric heating pipes 8 are horizontally arranged in parallel, and the lower third row of electric heating pipes 8 are horizontally arranged in parallel. The heating power of 81KW is designed, the temperature is quickly raised, the constant temperature control can be realized, and the working efficiency is improved. The heating pipe is treated with heat insulating cotton by sticking method.

The manual exhaust ball valve hole 2 is provided with a manual exhaust ball valve for reserving a steam outlet or safely releasing pressure during maintenance. The manual exhaust ball valve is in a closed state when normally working, and can be opened only after the manual exhaust ball valve is stopped when the pressure and the temperature are reduced to be within a safe range, so that the manual exhaust ball valve is convenient to overhaul or clean the box body.

The temperature sensor hole 3 is provided with a temperature sensor, and the real-time temperature acquisition is convenient for calculating and controlling the temperature. The temperature sensor adopts a high-pressure-resistant temperature sensor, so that the detection accuracy, balance and stability of the temperature sensor are ensured. And a temperature protection switch is also arranged to prevent the dry burning condition during the electric heating failure or the water supply system failure.

The liquid level meter hole 4 is provided with a liquid level meter for realizing single-hole double-liquid level monitoring control, which is divided into high and low liquid levels, and the outside uses a liquid level controller to control the action of a water supply pump in combination with a PLC signal so as to fulfill the requirement of automatic water supply and water supplement. One interface is used for completing the monitoring of the high and low liquid levels and reducing the occupation of the box body holes.

The safety relief valve hole 5 is provided with a safety relief valve, the safety relief valve is an adjustable automatic relief valve, a silencing device is arranged at the air outlet of the adjustable automatic relief valve, and the safety of the pressure vessel is ensured. Pressure double protection, temperature protection, design pressure 0.4Mpa and relief valve pressure 0.35Mpa.

The pressure switch and the pressure gauge hole 6 are provided with a pressure switch and a pressure gauge. The pressure switch and the pressure gauge hole are provided with a stainless steel tee joint, a first passage of the stainless steel tee joint is connected with the box body 1, a second passage of the stainless steel tee joint is connected with the pressure switch, and a third passage of the stainless steel tee joint is connected with the pressure gauge through an air pipe. The pressure switch adopts a mechanical electric signal type pressure protection switch for monitoring pressure overload. The pressure switch selects pressure to be adjustable, the passive signal output type, and the pressure gauge selects pressure measuring range of-1-5 bar.

The steam outlet 7 is provided with a group of manual ball valves which are in a normally open state, the manual ball valves are used when the container is independently subjected to pressure test, and the ball valve outlet is connected with a pneumatic control valve and a steam pipeline.

The electric heating pipe 8 is a tubular electric heating element and consists of a metal pipe spiral resistance wire, crystalline magnesia powder and the like.

The blowdown outlet 9 is connected with a blowdown valve and is connected to a system blowdown outlet through a pipeline, on-off is controlled through a pneumatic control valve, and the blowdown valve is used when a container is cleaned and used for cleaning or overhauling drainage of a water tank.

The reserved hole 10 is used for reserving a sensor or a protection type interface and can be used for a water inlet or a standby outlet of a sewage outlet.

The water supply hole 11 is connected with a water supply pump through a pipeline. Automatic water supplementing and selective water draining are performed through a liquid level meter and a PLC (programmable logic controller) control water pump, stable water quantity in the tank is guaranteed, liquid level monitoring is performed in real time, and dry burning protection is achieved.

All the pipelines are subjected to heat preservation treatment, so that the heat loss is reduced, and meanwhile, the touch safety is ensured.

The steam generator of the utility model converts water into steam by converting electric energy into heat energy through energy conversion. In the operation process of the electric heating steam generator, the liquid level gauge feeds back the water level, the opening and closing of the water pump are controlled through the PLC, the water quantity of water supply and the heating time of the electric heating pipe 8 are controlled, and the steam pressure is set. Along with the continuous output of steam, the water level in the pressure vessel is reduced, the water pump automatically supplements water when the water level is at a low level, the water pump stops when the water level is at a high level, and the electric heating tube in the pressure vessel is continuously heated to continuously generate steam.

The steam generator controls the water pump to operate according to the low liquid level feedback, and the water pump stops working when the water supply reaches the high liquid level feedback. The electric heating tube 8 starts to heat when the liquid level is higher than the lowest liquid level line. The left end face of the evaporator is horizontally inserted with three rows of U-shaped electric heating pipes 8, the first row is 4 9KW heating pipes 8, the second row is 3 9KW heating pipes 8, the bottom row is 2 9KW heating pipes 8, and 9KW electric heating pipes are added. The PLC controls the heating pipe 8 in three groups, wherein the power of the first two groups is 4 x 9KW, the power of the third group is 1 x 9KW, the heating pipe runs under the condition of expiration load before starting, and after the temperature and pressure requirements are rapidly met, the temperature is controlled through the PID of the three groups of heaters by adopting an incremental calculation mode, and the formula is as follows:

PID=Uk+KP*【E(k)-E(k-1)】+KI*E(k)+KD*【E(k)-2E(k-1)+E(k-2)】

wherein, KP: scaling factor, KI: integration constant, KD: differential constant, uk: stealth parameters, E (k): sign bit.

And then the high-temperature high-pressure steam is quickly delivered to a sterilizing bin of the biohazard waste treatment equipment through a short-distance pipeline by controlling a steam electromagnetic valve. The utility model has high control precision, small temperature difference and temperature fluctuation, can effectively reduce the cost of a sterilization system and simplify the structure of the system. The heat loss is reduced, and the energy utilization rate is improved.

The steam generator of the present utility model is located in the left middle of the overall biohazard waste treatment facility, see the location indicated by the dashed box a in fig. 2. When the waste is poured into the sterilizing bin of the biohazard waste treatment equipment, the sterilizing bin door is closed to form a closed space, and the crushing system of the biohazard waste treatment equipment starts to work, meanwhile, the air supply valve of the steam generator is opened, the air supply time is more than 3min, the air supply temperature is 134 ℃, and after the whole working flow is finished, the material is discharged for cleaning and can enter the next period for working. The steam generator for biohazard waste treatment equipment of the present utility model may provide a source of steam for the high temperature sterilization of bandages, gauze, dialyzers, charter, cloth and textile waste, plastics, glassware, human and animal tissue (including bones), pathological waste, expired and unused drugs and vaccines, laboratory cultures, plastic packaging and cartons, and the like.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present utility model, and such modifications and variations should also be regarded as being within the scope of the utility model.

Claims (10)

1. A steam generator for a biohazard waste treatment facility, the steam generator comprising: the automatic water supply device comprises a box body (1), wherein a manual air exhaust ball valve hole (2), a temperature sensor hole (3), a liquid level meter hole (4), a safety pressure relief valve hole (5), a pressure switch, a pressure meter hole (6), a steam outlet (7), an electric heating pipe (8), a sewage outlet (9), a preformed hole (10) and a water supply hole (11) are formed in the box body (1);

the manual exhaust ball valve hole (2), the temperature sensor hole (3), the liquid level meter hole (4), the safety pressure relief valve hole (5), the pressure switch, the pressure meter hole (6) and the steam outlet (7) are arranged at the top of the box body (1);

the sewage outlet (9), the reserved hole (10) and the water supply hole (11) are arranged at the bottom of the box body (1);

the heating main body of the electric heating pipe (8) is arranged inside the box body, and the electric connecting part of the electric heating pipe (8) is arranged on the left side surface of the box body (1).

2. A steam generator for biohazard waste treatment equipment according to claim 1, characterized in that the tank (1) comprises a pressure vessel, a heat-insulating casing, heat-insulating cotton; the pressure container is arranged inside the heat-insulating shell, and the heat-insulating cotton is filled between the pressure container and the heat-insulating shell; the pressure vessel comprises a first end plate, a second end plate and a guard plate; the heat preservation shell comprises a first heat preservation Wen Duanban, a second heat preservation end plate, a heat preservation bottom plate and a heat preservation guard plate.

3. The steam generator for biohazard waste treatment equipment of claim 2, wherein said first and second end plates are hemispherical shells; the guard plate is a cylindrical shell; the first end plate and the second end plate are welded at two ends of the guard plate respectively to form the pressure container.

4. The steam generator for biohazard waste treatment equipment of claim 2, wherein said first Wen Duanban and second insulation end plates are each flat plates having an upper semi-circular shape and a lower rectangular shape; the heat-insulating bottom plate is a rectangular flat plate; the heat-insulating guard plate is a rectangular flat plate with a U-shaped bending section; the first heat preservation Wen Duanban and the second heat preservation end plate are riveted at two ends of the heat preservation guard plate, the heat preservation bottom plate is riveted at the bottoms of the first heat preservation Wen Duanban, the second heat preservation end plate and the heat preservation guard plate, and the heat preservation shell with the upper part being a semi-cylinder and the lower part being a cuboid is formed.

5. The steam generator for biohazard waste treatment equipment of claim 4, wherein said insulated housing has an upper semi-cylindrical diameter of 578mm and a height of 824mm.

6. The steam generator for biohazard waste treatment equipment of claim 2, wherein said first end plate, second end plate, guard plate, first guard Wen Duanban, second insulating end plate, insulating bottom plate, insulating guard plate are all stainless steel.

7. A steam generator for biohazard waste treatment equipment according to claim 2, characterized in that said electric heating tube (8) comprises a U-shaped heating body, said heating body being arranged inside said pressure vessel; the number of the electric heating pipes (8) is 9, the electric heating pipes are arranged in 3 rows from top to bottom, the upper first row of the electric heating pipes (8) are horizontally arranged in parallel, the middle second row of the electric heating pipes (8) are horizontally arranged in parallel, and the lower third row of the electric heating pipes (8) are horizontally arranged in parallel.

8. A steam generator for biohazard waste treatment equipment according to claim 1, characterized in that the manual exhaust valve opening (2) is fitted with a manual exhaust ball valve; the temperature sensor hole (3) is provided with a temperature sensor; the liquid level meter hole (4) is provided with a liquid level meter; the safety pressure relief valve hole (5) is provided with a safety pressure relief valve; the pressure switch and the pressure gauge hole (6) are provided with a pressure switch and a pressure gauge; the blowdown outlet (9) is connected with a blowdown valve; the water supply hole (11) is connected with a water supply pump.

9. The steam generator for biohazard waste treatment equipment of claim 8, wherein the safety relief valve is an adjustable automatic relief valve, and a muffler is mounted at an air outlet of the adjustable automatic relief valve.

10. The steam generator for biohazard waste treatment equipment of claim 8, wherein the pressure switch and the pressure gauge hole are fitted with a stainless steel tee, a first passage of the stainless steel tee is connected to the tank (1), a second passage is connected to the pressure switch, and a third passage is connected to the pressure gauge through an air pipe.

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