CN113526817B

CN113526817B - Sludge treatment device

Info

Publication number: CN113526817B
Application number: CN202111080823.6A
Authority: CN
Inventors: 李晓晶; 顾红梅; 丛淅
Original assignee: Jiangsu Siyuan Environmental Remediation Co ltd
Current assignee: Jiangsu Siyuan Environmental Remediation Co ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2021-11-26
Anticipated expiration: 2041-09-15
Also published as: CN113526817A

Abstract

The invention discloses a sludge treatment device which comprises a shell, wherein a treatment chamber is arranged in the shell, the inner bottom of the treatment chamber is communicated with the outside through a discharge hole, a feed hole is formed in the inner top of the treatment chamber, a rotating pipe is vertically arranged in the treatment chamber, the upper end of the rotating pipe is rotatably connected with the inner top of the treatment chamber, an air pump is arranged on the right side of the shell, an air outlet end of the air pump is communicated with a communicating pipe, the upper end of the rotating pipe penetrates through the inner top of the treatment chamber and is connected with the other end of the communicating pipe through a rotating joint, and a plurality of stirring blades are arranged on the side wall of the rotating pipe. The device can get into biological stoste according to the volume of silt when using, avoids the waste of biological stoste or drops into too little condition and takes place, and after accomplishing the decomposition, the subassembly that can the automatic start heating has reduced staff's the amount of labour to a certain extent.

Description

Sludge treatment device

Technical Field

The invention relates to the field of sludge treatment, in particular to a sludge treatment device.

Background

At present, with the continuous development of science and technology and the progress of times, the living standard of people is continuously improved, so that the requirement of people on sludge treatment is higher and higher, the traditional sludge post-treatment conversion device is insufficient for mixing biological stock solution and sludge, and the treatment efficiency is lower;

therefore, the Chinese patent with the publication number of 'CN 109574433B' discloses a municipal sludge treatment device and a treatment method thereof, and comprises a box body, wherein the top of the box body is fixedly connected with a motor, an output shaft of the motor is fixedly connected with a rotating shaft, the bottom end of the rotating shaft extends into the box body, a plurality of stirring blades are welded on the outer side of the rotating shaft, connecting pipes are fixedly connected to two sides of the box body, the top ends of the two connecting pipes are connected with the same air box, and the air box is fixedly arranged on one side of the top of the box body;

in practical use, we find that although sludge and biological stock solution can be fully mixed by adopting the method, in the using process, a proper amount of microbial stock solution cannot be added according to the amount of the input sludge, so that the waste of the microbial stock solution or poor treatment effect can be caused, and workers are required to manually start the heating assembly after the microbial decomposition work is completed, so that the labor capacity of the workers is undoubtedly increased, and how to solve the problems needs to be considered.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a sludge treatment device which can be used for feeding biological stock solution according to the amount of sludge, so that the waste or the too little feeding of the biological stock solution is avoided, a heating assembly can be automatically started after the decomposition is finished, and the labor amount of workers is reduced to a certain extent.

In order to achieve the purpose, the invention adopts the following technical scheme:

a sludge treatment device comprises a shell, wherein a treatment chamber is arranged in the shell, the inner bottom of the treatment chamber is communicated with the outside through a discharge hole, a feed inlet is formed in the inner top of the treatment chamber, a rotating pipe is vertically arranged in the treatment chamber, the upper end of the rotating pipe is rotatably connected with the inner top of the treatment chamber, an air pump is installed on the right side of the shell, an air outlet end of the air pump is communicated with a communicating pipe, the upper end of the rotating pipe penetrates through the inner top of the treatment chamber and is connected with the other end of the communicating pipe through a rotating joint, a plurality of stirring blades are arranged on the side wall of the rotating pipe, rectangular cavities are arranged in the stirring blades, each rectangular cavity is communicated with the rotating pipe through a connecting pipe, a plurality of air outlets are arranged at the inner bottom of each rectangular cavity, a motor is installed at the upper end of the shell, and an output end of the motor extends into the treatment chamber, the output end of the motor is in transmission connection with the rotating pipe through a transmission structure, a purification assembly is installed on the left side wall of the shell, and the air inlet end of the purification assembly extends into the treatment chamber.

Preferably, a liquid storage box is installed on the right side wall of the shell, a microorganism stock solution is filled in the liquid storage box, the bottom space of the liquid storage box is communicated with the communicating pipe through a liquid inlet pipe, and an electromagnetic valve is installed in the liquid inlet pipe.

Preferably, the right side wall mounting of casing has the heating box, install spiral heating wire in the heating box, heating box inner space passes through intercommunication mouth and communicating pipe intercommunication, install the check valve in the intercommunication mouth, the inner space of heating box passes through one-way air inlet and external intercommunication, install the check valve in the one-way air inlet.

Preferably, the closed structure comprises a sealing block arranged on the left side of the feeding hole, and a touch switch used for controlling the motor and the air pump is arranged on the sealing block.

Preferably, the upper end of the housing is provided with a sliding groove, the sliding groove is internally provided with a sliding plate which can slide up and down, the upper end of the sliding plate is fixedly connected with a supporting rod, the upper end of the supporting rod penetrates through a groove opening of the sliding groove, and the lower end of the sliding plate is elastically connected with the inner bottom of the sliding groove through a restoring spring.

Preferably, the interior top of processing chamber is provided with electrically conductive box, set up in the electrically conductive box and be used for gliding electrically conductive piston piece from top to bottom, the symmetry is provided with two first electroplax on the both sides inner wall of electrically conductive box, the symmetry is provided with two second electroplax on the both sides inner wall of electrically conductive box, first electroplax cooperatees with spiral heating wire, the second electroplax cooperatees with the solenoid valve.

Preferably, the bottom space of electrically conductive box is through the one-way bottom space intercommunication that goes out tuber pipe and sliding tray, the bottom space of electrically conductive box passes through blast pipe and treatment room intercommunication, the pipe diameter of blast pipe is one-tenth of one-way tuber pipe diameter, the bottom space of sliding tray passes through air intake and treatment room intercommunication, all install the check valve in air intake and the one-way air-out pipe.

Preferably, the interior bottom of treatment chamber is provided with gravity sensing component, the left side of electrically conductive box is provided with the spout, install on the right side inner wall of spout with gravity sensing component complex electro-magnet, be provided with the magnetism slider that is used for the horizontal slip in the spout, the right-hand member and the electro-magnet of magnetism slider pass through connecting spring elastic connection, the left end fixedly connected with connecting rod of magnetism slider, the notch of spout is run through to the left end of connecting rod to fixedly connected with blocks the piece.

Compared with the prior art, the invention has the beneficial effects that:

1. be provided with touch switch and electrically conductive box, whole in-process only needs once to open and close touch switch and can realize the stirring to mud, the input of microorganism stoste, the oxygen suppliment of microorganism raw materials and the start-up of spiral heating wire, very big reduction the labour and use.

2. Be provided with the purification subassembly, when can be with microorganism decomposition mud through the setting of purification subassembly, the foul smell gas and the peculiar smell of production have promoted the environmental protection performance of device, have avoided taking place the condition that causes the pollution to the surrounding environment when handling sludge.

3. When the sewage that drops into is more, after through the transmission of gravity sensing subassembly, the electric current that goes up of electro-magnet through is big more, thereby the repulsion that produces is big more, the distance that makes the magnetic slide block move to the left is just big more, the hole of the air-out department of blast pipe at this moment also diminishes, in the unchangeable condition of air pump power, it also can become more to actually drop into microorganism stoste, on the contrary, when dropping into the sludge volume less, the microorganism stoste volume of discharging also can diminish, can go to drop into biological stoste according to the quantity of silt, avoid the waste of biological stoste or drop into the too little condition and take place.

Drawings

FIG. 1 is a schematic structural view of a sludge treatment apparatus according to the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

FIG. 4 is an enlarged view at C of FIG. 3;

FIG. 5 is a schematic view of the sealing block of FIG. 1 in a closed state;

FIG. 6 is a schematic structural diagram of embodiment 2 of the present invention;

fig. 7 is an enlarged view of fig. 6 at D.

In the figure: 1 shell, 2 processing chambers, 3 discharge ports, 4 feed ports, 5 sealing blocks, 6 touch switches, 7 air pumps, 8 heating boxes, 9 liquid storage boxes, 10 rotary joints, 11 motors, 12 transmission structures, 13 rotating pipes, 14 rectangular cavities, 15 purification components, 16 liquid inlet pipes, 17 spiral heating wires, 18 one-way air inlets, 19 communication ports, 20 communication pipes, 21 sliding grooves, 22 abutting rods, 23 sliding plates, 24 recovery springs, 25 air inlets, 26 conductive boxes, 27 one-way air outlet pipes, 28 exhaust pipes, 29 first electric connection plates, 30 conductive piston blocks, 31 second electric connection plates, 32 wind blocking boxes, 33 electromagnets, 34 magnetic sliders, 35 connection springs, 36 blocking blocks, 37 gravity sensing components and 38 stirring blades.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

Referring to fig. 1-5, a sludge treatment device comprises a housing 1, a treatment chamber 2 is arranged in the housing 1, the inner bottom of the treatment chamber 2 is communicated with the outside through a discharge port 3, a valve is arranged at the discharge port 3, the valve is closed when the sludge treatment chamber is carried out, and after the valve is closed, the valve is opened, the inner bottom of the housing 1 is obliquely arranged for facilitating subsequent discharge, a feed port 4 is arranged at the inner top of the treatment chamber 2, a rotating pipe 13 is vertically arranged in the treatment chamber 2, the upper end of the rotating pipe 13 is rotatably connected with the inner top of the treatment chamber 2, an air pump 7 is arranged at the right side of the housing 1, the air outlet end of the air pump 7 is communicated with a communicating pipe 20, the upper end of the rotating pipe 13 penetrates through the inner top of the treatment chamber 2 and is connected with the other end of the communicating pipe 20 through a rotary joint 10, a plurality of stirring blades 38 are arranged on the side wall of the rotating pipe 13, a rectangular cavity 14 is arranged in each stirring blade 38, each rectangular cavity 14 is communicated with the rotating pipe 13 through a connecting pipe, the bottom in each rectangular cavity 14 is provided with a plurality of air outlets, so that subsequent gas and liquid can be discharged conveniently, and a transparent observation window can be arranged in the top space of the treatment chamber 2 to observe the subsequent sludge drying degree;

as an embodiment of the present invention, a motor 11 is installed at the upper end of a housing 1, the output end of the motor 11 extends into a processing chamber 2, the output end of the motor 11 is in transmission connection with a rotating pipe 13 through a transmission structure 12, the transmission structure 12 is two transmission wheels, the two transmission wheels are in transmission connection through a transmission belt, the sealing structure includes a sealing block 5 installed at the left side of a feeding port 4, the sealing block 5 is connected to the upper end of the housing 1 in a rotating manner as shown in fig. 1, a touch switch 6 for controlling the motor 11 and an air pump 7 is arranged on the sealing block 5, a power supply is arranged here, the power supply, the control motor 11, the air pump 7 and the touch switch 6 form a loop, and the air pump 7 and the motor 11 can be opened and closed by starting and closing the touch switch 6; a purification assembly 15 is installed on the left side wall of the shell 1, the purification assembly 15 is the prior art and can be an existing micro purifier, and the air inlet end of the purification assembly 15 extends into the treatment chamber 2;

as an embodiment of the invention, a liquid storage box 9 is installed on the right side wall of a shell 1, a microorganism stock solution is filled in the liquid storage box 9, the bottom space of the liquid storage box 9 is communicated with a communicating pipe 20 through a liquid inlet pipe 16, an electromagnetic valve is installed in the liquid inlet pipe 16, a heating box 8 is installed on the right side wall of the shell 1, a spiral heating wire 17 is installed in the heating box 8, the inner space of the heating box 8 is communicated with the communicating pipe 20 through a communicating port 19, a one-way valve is installed in the communicating port 19 (ensuring that gas enters the communicating pipe 20 from the heating box 8 in a one-way manner), the inner space of the heating box 8 is communicated with the outside through a one-way air inlet 18, and a one-way valve is installed in the one-way air inlet 18 (ensuring that gas outside enters the heating box 8 through the one-way air inlet 18 in a one-way manner);

as an embodiment of the present invention, a sliding groove 21 is provided at the upper end of the housing 1, a sliding plate 23 for sliding up and down is provided in the sliding groove 21, a resisting rod 22 is fixedly connected to the upper end of the sliding plate 23, the upper end of the resisting rod 22 penetrates through the notch of the sliding groove 21, the lower end of the sliding plate 23 is elastically connected to the inner bottom of the sliding groove 21 through a restoring spring 24, a conductive box 26 is provided at the inner top of the processing chamber 2, a conductive piston block 30 for sliding up and down is provided in the conductive box 26, two first contact plates 29 are symmetrically provided on the inner walls of both sides of the conductive box 26, the negative electrode of the power supply is electrically connected to the first contact plate 29 on the left side through a wire, the positive electrode of the power supply, the touch switch 6, the spiral heating wire 17 and the first contact plate 29 on the right side are electrically connected through a wire, two second contact plates 31 are symmetrically provided on the inner walls of both sides of the conductive box 26, the first electric connecting plate 29 is matched with the spiral heating wire 17, the second electric connecting plate 31 is matched with the electromagnetic valve, the positive electrode of the power supply is electrically connected with the second electric connecting plate 31 positioned on the left side through a lead, and the negative electrode of the second electric connecting plate 31, the electromagnetic valve and the second electric connecting plate 31 positioned on the right side are electrically connected;

as an embodiment of the invention, the bottom space of the conductive box 26 is communicated with the bottom space of the sliding groove 21 through a one-way air outlet pipe 27, the bottom space of the conductive box 26 is communicated with the processing chamber 2 through an air outlet pipe 28, the diameter of the air outlet pipe 28 is one ninth of the diameter of the one-way air outlet pipe 27, so that the air outlet speed of the air outlet pipe 28 is slow, after the conductive piston block 30 moves upwards, the left movement and the downward movement speed under the gravity are slow, thereby ensuring that the electromagnetic valve can be electrified for a period of time, the bottom space of the sliding groove 21 is communicated with the processing chamber 2 through the air inlet 25, the air inlet 25 and the one-way air outlet pipe 27 are both provided with one-way valves, the one-way valve in the air inlet 25 ensures that the air enters the bottom space of the sliding groove 21 from the processing chamber 2 in a one-way manner, and the one-way valve at the one-way air outlet pipe 27 ensures that the air enters the conductive box 26 from the bottom space of the sliding groove 21 in a one-way manner.

When the device is used, the valve at the discharge port 3 is closed, then sludge to be treated is placed in the treatment chamber 2, then the sealing block 5 is closed, the state shown in fig. 5 is achieved, after the sealing block 5 is closed, the pressing rod 22 is rapidly extruded, the sliding plate 23 is made to move downwards, air at the bottom in the sliding groove 21 is discharged into the bottom space of the conductive box 26, the conductive piston block 30 is made to move upwards rapidly (due to the fact that the exhaust pipe 28 is thin, the exhaust speed cannot be met, and the air pressure in the bottom space of the conductive box 26 is increased), and at the moment, the conductive piston block 30 moves upwards to the limit position and contacts with the two second electric connection plates 31, so that the electromagnetic valve is conducted;

meanwhile, the touch switch 6 is pressed down, the air pump 7 and the motor 11 are started simultaneously (at this time, the two first electric connection plates 29 are in an off state, so that the spiral heating wire 17 cannot be started even if the touch switch 6 is opened), the motor 11 drives the rotating pipe 13 to rotate through the transmission structure 12, the rotating pipe 13 drives the plurality of stirring blades 38 to rotate to stir the sludge, at this time, the air pump 7 injects the gas into the plurality of rectangular cavities 14 through the communicating pipe 20, the rotating pipe 13 and the plurality of connecting pipes, and finally discharges the gas, because the electromagnetic valve is in an on state at this time, the gas flow rate in the communicating pipe 20 is high (according to the bernoulli principle, the gas flow rate is high, the pressure is low), so that the microbial raw liquid can be continuously sucked into the communicating pipe 20 through the liquid inlet pipe 16 by the pressure difference, and is uniformly discharged into the treatment chamber 2 through the plurality of gas outlets (here, namely, the microbial raw liquid addition is performed), the microbial stock solution is fully contacted with the sludge to carry out microbial decomposition;

along with the continuous downward movement of the conductive piston block 30, when the conductive piston block 30 moves downward and does not contact the two second electric connection plates 31, the electromagnetic valve is powered off again, the gas discharged by the air pump 7 is matched with the plurality of stirring blades 38 to supply oxygen for the decomposition of the microorganisms, the decomposition speed of the microorganisms can be accelerated, and the toxic or unpleasant gas generated by the decomposition can be discharged after being purified from the purification assembly 15, so that the influence of the gas on the environment is avoided;

with the continuous downward movement of the conductive piston block 30, the conductive piston block will contact with the two first electric connection plates 29, so that the spiral heating wire 17 starts to work, and under the action of air pressure, high-temperature gas generated in the heating box 8 can be sucked into the communicating pipe 20, and is finally and uniformly discharged into the treatment chamber 2, so as to perform drying action on sludge, and a worker can observe the drying state of the sludge through the transparent observation window, and after the drying state of the sludge reaches the standard, close the touch switch 6, and open the valve at the discharge port 3, so that the time (influenced by the exhaust pipe 28, the gravity of the conductive piston block 30 and the friction force between the conductive piston block 30 and the inner wall of the conductive box 26) required by the conductive piston block 30 from leaving the second electric connection plate 31 to contacting with the first electric connection plate 29 can be set according to conventional implementation in practice, so as to meet the requirement that complete biological decomposition is performed.

Example 2

Referring to fig. 6-7, the present embodiment is different from embodiment 1 in that a gravity sensing assembly 37 is disposed at the bottom inside the processing chamber 2, a sliding slot is disposed at the left side of the conductive box 26, an electromagnet 33 fitted with the gravity sensing assembly 37 is mounted on the inner wall of the right side of the sliding slot, a magnetic slider 34 for sliding left and right is disposed in the sliding slot, the right end of the magnetic slider 34 is elastically connected to the electromagnet 33 through a connecting spring 35, the electromagnet 33 is repelled by the same polarity on the adjacent surface to the magnetic slider 34 after being energized, and a controller is disposed therein, the controller processes and analyzes the signal transmitted by the gravity sensing assembly 37 and transmits the signal to the electromagnet 33 in a current magnitude adjusting manner, when the gravity sensing assembly 37 is subjected to a larger action of gravity, the current passing through the electromagnet 33 is larger, and conversely, the current passing through the electromagnet 33 is smaller, the left end of the magnetic slider 34 is fixedly connected to a connecting rod, the left end of the connecting rod penetrates through the notch of the sliding groove and is fixedly connected with a blocking block 36.

In this embodiment, when a large amount of sewage is input, and after the sewage is transmitted through the gravity sensing assembly 37, the current passing through the electromagnet 33 is larger, so that the generated repulsion force is larger, the distance for moving the magnetic slider 34 to the left is larger, the hole at the air outlet of the exhaust pipe 28 at this time is also smaller, the speed for moving the subsequent conductive piston block 30 downward is slower (i.e. the electromagnetic valve power-on time is longer), under the condition that the power of the air pump 7 is not changed, the actual input microbial stock solution is also larger, and the time required by the conductive piston block 30 from leaving the second electric contact plate 31 to contacting the first electric contact plate 29 (i.e. the time for the air pump to react the raw material with the sludge after the raw material is input) is also longer, so as to ensure that the oxygen supply for the microbes can be completely decomposed, otherwise, when the input amount of sludge is smaller, the amount of the input microbial stock solution is also smaller;

it should be noted here that in the circuit formed by the gravity sensing assembly 37, the controller and the electromagnet 33, the gravity can be increased significantly, the current passing through the electromagnet 33 will be slightly increased, the gravity will be slightly changed, and there will be almost no influence on the electromagnet 33, and the weight of the microorganism raw liquid is relatively the total weight of the sludge, so that the situation that the gravity sensing assembly 37 transmits information to move the blocking block 36 to the left after the microorganism raw liquid is put into the circuit will not occur.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A sludge treatment device comprises a shell (1) and is characterized in that a treatment chamber (2) is arranged in the shell (1), the inner bottom of the treatment chamber (2) is communicated with the outside through a discharge hole (3), a feed inlet (4) is formed in the inner top of the treatment chamber (2), a rotating pipe (13) is vertically arranged in the treatment chamber (2), the upper end of the rotating pipe (13) is rotatably connected with the inner top of the treatment chamber (2), an air pump (7) is installed on the right side of the shell (1), an air outlet end of the air pump (7) is communicated with a communicating pipe (20), the upper end of the rotating pipe (13) penetrates through the inner top of the treatment chamber (2) and is connected with the other end of the communicating pipe (20) through a rotary joint (10), a plurality of stirring blades (38) are arranged on the side wall of the rotating pipe (13), and a rectangular cavity (14) is formed in each stirring blade (38), each rectangular cavity (14) is communicated with a rotating pipe (13) through a connecting pipe, the inner bottom of each rectangular cavity (14) is provided with a plurality of air outlets, a motor (11) is installed at the upper end of the shell (1), the output tail end of the motor (11) extends into the processing chamber (2), the output tail end of the motor (11) is in transmission connection with the rotating pipe (13) through a transmission structure (12), a purification assembly (15) is installed on the left side wall of the shell (1), and the air inlet end of the purification assembly (15) extends into the processing chamber (2);

the upper end of the shell (1) is provided with a sliding groove (21), the inner top of the treatment chamber (2) is provided with a conductive box (26), the bottom space of the conductive box (26) is communicated with the bottom space of the sliding groove (21) through a one-way air outlet pipe (27), the bottom space of the conductive box (26) is communicated with the treatment chamber (2) through an exhaust pipe (28), the pipe diameter of the exhaust pipe (28) is one ninth of the pipe diameter of the one-way air outlet pipe (27), the bottom space of the sliding groove (21) is communicated with the treatment chamber (2) through an air inlet (25), and one-way valves are respectively arranged in the air inlet (25) and the one-way air outlet pipe (27);

the interior bottom of process chamber (2) is provided with gravity sensing subassembly (37), the left side of electrically conductive box (26) is provided with the spout, install on the right side inner wall of spout with gravity sensing subassembly (37) complex electro-magnet (33), be provided with in the spout and be used for horizontal slip's magnetic slide (34), the right-hand member and electro-magnet (33) of magnetic slide (34) pass through connecting spring (35) elastic connection, the left end fixedly connected with connecting rod of magnetic slide (34), the notch of spout is run through to the left end of connecting rod to fixedly connected with blocks piece (36).

2. The sludge treatment device according to claim 1, wherein a liquid storage box (9) is installed on the right side wall of the housing (1), the liquid storage box (9) is filled with microorganism stock solution, the bottom space of the liquid storage box (9) is communicated with the communicating pipe (20) through a liquid inlet pipe (16), and an electromagnetic valve is installed in the liquid inlet pipe (16).

3. The sludge treatment device according to claim 2, wherein a heating box (8) is installed on the right side wall of the shell (1), a spiral heating wire (17) is installed in the heating box (8), the inner space of the heating box (8) is communicated with a communicating pipe (20) through a communicating port (19), a one-way valve is installed in the communicating port (19), the inner space of the heating box (8) is communicated with the outside through a one-way air inlet (18), and the one-way valve is installed in the one-way air inlet (18).

4. The sludge treatment device according to claim 1, further comprising a sealing structure, wherein the sealing structure comprises a sealing block (5) installed on the left side of the feed port (4), and a touch switch (6) for controlling the motor (11) and the air pump (7) is arranged on the sealing block (5).

5. The sludge treatment device according to claim 3, wherein a sliding plate (23) for sliding up and down is arranged in the sliding groove (21), a resisting rod (22) is fixedly connected to the upper end of the sliding plate (23), the upper end of the resisting rod (22) penetrates through the notch of the sliding groove (21), and the lower end of the sliding plate (23) is elastically connected with the inner bottom of the sliding groove (21) through a restoring spring (24).

6. The sludge treatment device according to claim 5, wherein a conductive piston block (30) for sliding up and down is arranged in the conductive box (26), two first electric connection plates (29) are symmetrically arranged on the inner walls of two sides of the conductive box (26), two second electric connection plates (31) are symmetrically arranged on the inner walls of two sides of the conductive box (26), the first electric connection plates (29) are matched with the spiral heating wire (17), and the second electric connection plates (31) are matched with the electromagnetic valve.