A small experimental animal carcass harmless incinerator

Abstract

The present invention discloses a harmless incinerator for small experimental animal carcasses, belonging to the technical field of incinerators. It includes: a furnace body, which is integrally composed of a rotating cylinder bin in the upper part and a combustion chamber in the lower part; a rotating incineration assembly, which includes a rotating cylinder rotatably installed in the rotating cylinder bin; a vibration grinding assembly, which includes a hopper fixed in the combustion chamber and a spherical container arranged in the middle of the hopper and concave downward; a burner assembly, which includes a burner installed in the combustion chamber; a negative pressure adsorption device, which is communicated with the furnace body. The rotating incineration assembly driven by an electric servo drive mechanism can preliminarily incinerate the feed without dead angles. Among them, the control rolling part reciprocates to realize the preliminary incineration and rolling of the feed, and then the screening part is used to screen the materials rolled into small particles into the vibration grinding assembly for further pulverization.

Description

Technical Field

[0001] The present invention relates to a harmless incinerator for small experimental animal carcasses, belonging to the technical field of incinerators. Background Art

[0002] Small experimental animals, such as mice, rats, rabbits, and guinea pigs, play a crucial role in the field of medical research. They are often used as model organisms for drug screening and experimental analysis to promote scientific research progress and medical discoveries. The disposal of experimental animal carcasses must follow relevant policies to take harmless measures. Common methods include high-temperature incineration, chemical disinfectant treatment, or high-pressure steam sterilization technology to effectively prevent the spread of pathogenic microorganisms and thus protect the ecological environment from pollution.

[0003] Incineration is an efficient means of harmless treatment of small experimental animal carcasses, which shows significant advantages in ensuring the complete inactivation of pathogens. Currently, most hospitals tend to rely on professional off-site harmless treatment institutions to dispose of small experimental animal carcasses by incineration. However, this approach not only makes the transportation cost far exceed the actual incineration treatment cost, but also there is a risk of leakage of infectious bacteria during the entire transportation and loading / unloading process, which may pose a potential threat to the environment and public health. Therefore, promoting the local harmless treatment of small experimental animal carcasses in hospitals has become an urgent development direction that needs attention. Especially for small experimental animal carcasses with small volume and strong infectivity, using miniaturized and specialized incineration equipment for treatment within medical institutions can not only significantly reduce the transportation risk, but also improve the treatment efficiency and safety.

[0004] Currently, there are also some miniaturized incinerators with relatively simple structures. They use burners to incinerate small experimental animal carcasses, and the temperature is generally above 600°C, which can effectively disinfect and sterilize. However, there are also the following defects during the combustion process: First, there may be dead corners in the material combustion, and the combustion is not sufficient, resulting in an infection risk when dealing with the ashes; Second, the infectious bacteria in the incinerator may spread with the flue gas, increasing the infection risk to the environment and personnel.

[0005] Therefore, it is crucial to develop an efficient incinerator designed for small experimental animal carcasses in medical institutions and laboratories. This incinerator needs to ensure that small experimental animal carcasses can be completely burned to achieve the goal of thorough harmlessness. In addition, this incinerator also needs to integrate a negative pressure adsorption device to effectively capture and process the flue gas released during the incineration process, and be equipped with a powerful sterilization and disinfection function to ensure the overall safety and reliability during the incineration process. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a harmless incinerator for small experimental animal carcasses, enabling medical institutions to complete two-stage combustion and grinding locally, generating harmless solid ashes, and greatly reducing the risk of pathogen transmission.

[0007] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0008] A harmless incinerator for small experimental animal carcasses, comprising:

[0009] A furnace body, which is integrally composed of a rotary drum bin in the upper part and a combustion chamber in the lower part. The furnace body is installed on a vibrating chassis, and the rotary drum bin is provided with an openable feeding channel;

[0010] A rotating incineration assembly, which includes a rotary drum rotatably installed in the rotary drum bin and an electric servo drive mechanism for driving the rotary drum to rotate. The end face of the rotary drum is provided with a feed hole corresponding to the position of the feeding channel. The circumferential side of the rotary drum is divided into a screening part and a rolling part. The screening part of the rotary drum is provided with screening slits, and several rolling balls with diameters larger than the width of the screening slits are placed inside the rotary drum;

[0011] A vibrating grinding assembly, which includes a hopper fixed in the combustion chamber and a spherical container concave in the middle of the hopper. Several first grinding balls are placed inside the spherical container. A circular grinding channel is provided at the bottom of the spherical container, and a second grinding ball for grinding the discharged material into powder is installed in the grinding channel;

[0012] A burner assembly, which includes a burner installed in the combustion chamber and a deflection baffle rotatably installed in front of the burner nozzle for changing the flame injection direction;

[0013] A negative pressure adsorption device, which is connected to the furnace body. The negative pressure adsorption device sucks the inside of the furnace body to maintain a negative pressure state inside the furnace body. A pre-stage flue gas disinfection mechanism for disinfecting the extracted exhaust gas is installed at the air inlet end of the negative pressure adsorption device.

[0014] Preferably, the pre-stage flue gas disinfection mechanism includes a flue gas collection hood, a spiral tube, and a connecting pipe. The flue gas collection hood is arranged on the top of the rotary drum bin. The flue gas collection hood is connected to the spiral tube arranged between the burner nozzle and the deflection baffle through a connecting pipe, and the other end of the spiral tube is connected to the negative pressure adsorption device through a connecting pipe.

[0015] Preferably, the negative pressure adsorption device includes:

[0016] A negative pressure fan, which is connected to the furnace body and sucks the inside of the furnace body to maintain the negative pressure state of the furnace body;

[0017] A cyclone separator is connected between a negative pressure fan and a furnace body and is used for gas-solid separation of flue gas. The intake end of the cyclone separator is communicated with a pre-flue gas disinfection mechanism arranged in the furnace body;

[0018] An absorption tank is connected between the cyclone separator and the negative pressure fan and is used for adsorbing and filtering the flue gas after gas-solid separation.

[0019] Preferably, the absorption tank is a sealed tank body. The bottom of the absorption tank is provided with an intake end, and the top of the absorption tank is provided with an exhaust end. A circulating water cooling pipe and a filter adsorption layer are arranged from bottom to top. Among them, a wire mesh layer is welded on the outer surface of the circulating water cooling pipe.

[0020] Preferably, a sealed air mixing chamber is further arranged in the furnace body. The outlet end of the pre-flue gas disinfection mechanism is communicated with the bottom of the air mixing chamber. The upper part of the air mixing chamber is communicated with the intake end of the cyclone separator. A mixing air pipe is hermetically inserted into the top of the air mixing chamber. A one-way valve that only allows gas to flow in is arranged at the top end of the mixing air pipe. An adjustable intake valve is arranged at the intake end of the one-way valve. The adjustable intake valve is connected with a cold air supply pipe. A series of air inlet holes are arranged on the pipe wall of the mixing air pipe located in the air mixing chamber.

[0021] Preferably, the electric servo drive mechanism includes a servo motor whose rotation angle is precisely controlled by a controller. The servo motor is installed outside the furnace body and drives the rotation shaft of the rotating drum through a first sprocket drive mechanism. When the servo motor rotates the rolling part of the rotating drum to the lower part and maintains a pendulum-like forward and reverse rotation, the burner heats the rolling part of the rotating drum to carbonize the material. The rolling balls roll and grind the carbonized material. At this time, the vibrating chassis can concentrate the crushed material to the bottom of the rolling part and be repeatedly rolled by the rolling balls. When the servo motor rotates the screening part of the rotating drum to the lower part and maintains a pendulum-like forward and reverse rotation, the material smaller than the screening gap gradually falls from the screening gap.

[0022] Preferably, the first sprocket drive mechanism includes a first drive sprocket, a first rotating sprocket, and a first chain. The first drive sprocket is installed on the rotating shaft of the servo motor, and the first rotating sprocket is installed on the rotating shaft of the rotating drum. The first drive sprocket and the first rotating sprocket are driven by the first chain.

[0023] Preferably, the vibrating chassis includes a base, a vibrating seat installed above the base through a plurality of elastic members, and a vibrator installed on the vibrating seat. The furnace body is fixed on the vibrating seat.

[0024] Preferably, equally spaced tooth grooves are provided on the outer circumferential side of the rotary drum, and a cleaning gear roller meshing with the tooth grooves of the rotary drum is installed in the furnace body. The screening gap of the screening part is formed by digging through the tooth grooves outward from the inner circumference of the rotary drum. When the cleaning gear roller rolls to the screening part, the materials blocked in the screening gap are pressed into the interior of the rotary drum, and the outer end of the cleaning gear roller drives the second grinding ball to rotate through a second sprocket drive mechanism.

[0025] Preferably, a pull-out ash storage box is provided at the bottom of the combustion chamber.

[0026] The beneficial effects of the present invention are as follows:

[0027] (1) The rotating incineration assembly driven by an electric servo drive mechanism can preliminarily incinerate the feed without dead angles. Among them, controlling the reciprocating rotation of the rolling part realizes the preliminary incineration and rolling of the feed, and then the screening part is used to screen the materials rolled into small particles into the vibration grinding assembly for further pulverization;

[0028] (2) This structure can also process the waste medical supplies in hospitals, such as disposable infusion supplies with sharp instruments like infusion needles, injection needles, blood collection needles, etc. The sharp instruments are separated from the ashes in the vibration grinding assembly and can be recycled;

[0029] (3) The negative pressure adsorption device with a preposed flue gas disinfection mechanism can more thoroughly sterilize the flue gas extracted from the furnace body even when the internal temperature is not high enough in the initial stage, and basically eliminate the infection risk even after the external negative pressure adsorption device is saturated, further improving the safety. Description of the Drawings

[0030] Figure 1 is a three-dimensional structure schematic diagram of the present invention;

[0031] Figure 2 is a front structure schematic diagram of the present invention;

[0032] Figure 3 is an internal structure schematic diagram of the present invention;

[0033] Figure 4 is an internal structure schematic diagram of the furnace body;

[0034] Figure 5 is a structure schematic diagram of the rotary drum;

[0035] Figure 6 is a rotary drum drive structure schematic diagram;

[0036] Figure 7 is a side structure schematic diagram of the furnace body;

[0037] Figure 8 is a structure schematic diagram of the vibration grinding assembly;

[0038] Figure 9 It is a schematic structural diagram of the front - placed flue gas disinfection mechanism;

[0039] Figure 10 It is a schematic structural diagram of the main body part of the negative - pressure adsorption device;

[0040] Figure 11 It is a three - dimensional structural diagram of the main body part of the negative - pressure adsorption device;

[0041] Figure 12 It is a schematic structural diagram of the absorption tank;

[0042] Figure 13 It is a schematic structural diagram of a rotating drum with a self - cleaning function;

[0043] Figure 14 It is a schematic structural diagram when the toothed rotating drum and the cleaning gear are engaged;

[0044] Figure 15 It is a schematic structural diagram when the cleaning gear cleans the screening gap of the rotating drum;

[0045] Figure 16 It is a schematic structural diagram of the back of the furnace body.

[0046] In the figure:

[0047] 1. Furnace body; 101. Rotating drum bin; 102. Combustion chamber; 103. Feeding channel; 104. Pull - out ash box; 105. Air mixing chamber; 106. Air mixing pipe; 107. Check valve; 108. Adjustable air intake valve; 109. Air inlet hole; 110. Access hole;

[0048] 2. Rotating incineration assembly; 201. Rotating drum; 202. Support part; 203. Rotating shaft; 204. Feed hole; 205. Screening part; 206. Rolling part; 207. Screening gap; 208. Rolling ball; 209. Tooth groove; 210. Cleaning gear roller; 211. Second driving sprocket; 212. Second driven sprocket; 213. Second chain;

[0049] 3. Vibration grinding assembly; 301. Hopper; 302. Spherical container; 303. First grinding ball; 304. Grinding channel; 305. Second grinding ball; 306. Driving shaft;

[0050] 4. Burner assembly; 401. Burner; 402. Deflection baffle; 403. Switching shaft; 404. Eccentric block; 405. Cylinder;

[0051] 5. Negative - pressure adsorption device; 501. Negative - pressure fan; 502. Cyclone separator; 503. Absorption tank; 504. Circulating water cooling pipe; 505. Filter adsorption layer; 506. Steel wire mesh layer;

[0052] 6. Vibration chassis; 601. Base; 602. Elastic member; 603. Vibration seat; 604. Vibrator;

[0053] 7. Electric servo drive mechanism; 701. Servo motor; 702. First drive sprocket; 703. First rotating sprocket; 704. First chain;

[0054] 8. Front - end flue gas disinfection mechanism; 801. Flue gas collection hood; 802. Spiral tube; 803. Connecting pipe. Detailed implementation manners

[0055] For easy understanding of the technical means, creative features, achieved purposes and effects of the present invention, the present invention will be further described below with reference to specific drawings.

[0056] Before using this incinerator for harmless treatment, the small experimental animal corpses in the hospital need to be frozen and then crushed into particles of 10 - 20 mm, and then put into this small experimental animal corpse harmless incinerator for incineration treatment.

[0057] As Figures 1 - 4 shown, this small experimental animal corpse harmless incinerator includes: a furnace body 1, a rotating incineration assembly 2 arranged in the furnace body 1 for preliminary incineration, a vibration grinding assembly 3 for full - incineration and grinding, a burner assembly 4 for providing incineration flame, and a negative - pressure adsorption device 5 for sucking the inside of the furnace body 1 to prevent flue gas from overflowing.

[0058] The furnace body 1 is integrally composed of an upper rotating cylinder bin 101 and a lower combustion bin 102. The furnace body 1 is installed on a vibration chassis 6, and the rotating cylinder bin 101 is provided with an openable feeding channel 103. Heat - insulating materials are arranged outside the furnace body 1 to prevent accidental contact and scalding.

[0059] In some embodiments, the vibration chassis 6 includes a base 601, and a vibration seat 603 installed above the base 601 through a plurality of elastic members 602, and further includes a vibrator 604 installed on the vibration seat 603. The furnace body 1 is fixed on the vibration seat 603. The elastic members 602 can adopt spiral springs or disc springs. Through the eccentric vibration of the vibrator 604, the vibration chassis 6 and the furnace body 1 fixed on the vibration chassis 6 vibrate together.

[0060] In some embodiments, a pull - out ash box 104 is arranged at the bottom of the combustion bin 102. Under the action of the vibration chassis 6, the pull - out ash box 104 vibrates and spreads the ashes out flat to prevent the ashes from concentrating too much in the middle.

[0061] As Figures 5 - 7As shown in the figure, the rotating incineration assembly 2 includes a rotating cylinder 201 rotatably installed in the rotary cylinder bin 101. The rotating cylinder 201 is made of steel material or ceramic material that can withstand 1100 °C. Among them, the steel material can be 310S stainless steel, which has excellent high-temperature strength and oxidation resistance. It can still maintain good mechanical properties at a high temperature of 1100 °C, is not prone to deformation and oxidation corrosion, has a relatively high melting point, and can be used for a long time in a high-temperature environment. A rotating shaft 203 is fixed on the central axis of the rotating cylinder 201 through a support part 202, and the rotating shaft 203 is rotatably installed on the furnace body 1 through a stuffing box sealing structure.

[0062] It also includes an electric servo drive mechanism 7 for driving the rotation of the rotating cylinder 201. An inlet hole 204 corresponding to the position of the feeding channel 103 is opened on the end face of the rotating cylinder 201. The frozen and crushed small animal carcass particles enter the rotating cylinder 201 from the feeding channel 103 and the inlet hole 204, and then the feeding channel 103 is closed, so that the particles burn in the rotating cylinder 201. The circumferential side surface of the rotating cylinder 201 is divided into a screening part 205 and a rolling part 206. The angle a of the screening part 205 in the circumference ranges from 30° to 60°, and the remaining area is the rolling part 206. Screening slits 207 are opened on the screening part 205 of the rotating cylinder 201. The length of the screening slits 207 is 100 - 500 mm, and the width of the screening slits 207 is 2 - 5 mm. This width is larger than the diameters of almost all common needles (the diameter range of common needles is between 0.18 mm and 1.2 mm). When incinerating medical waste with needles, it is beneficial for the needles to fall from the screening slits 207. A number of rolling balls 208 with diameters larger than the width of the screening slits 207 are placed inside the rotating cylinder 201. The diameter of the rolling balls 208 is 30 - 100 mm, and ceramic balls can be used, or 310S stainless steel with a rough surface can also be used.

[0063] In addition to having a rolling effect on the material, the rolling balls 208 also have a self-cleaning effect on the rotating cylinder 201. An arc chamfer is provided inside the rotating cylinder 201, and the radius of the arc chamfer is larger than the radius of the rolling balls 208. Through the continuous rotation of the rotating cylinder 201, the rolling balls 208 continuously and frictionlessly contact the inner wall of the rotating cylinder 201 without dead angles, cleaning the inner wall of the rotating cylinder 201.

[0064] As Figure 3 、 Figure 4 shown in the figure, the burner assembly 4 includes a burner 401 installed in the combustion chamber 102, and a deflection baffle 402 rotatably installed in front of the nozzle of the burner 401 for changing the flame jet direction. In the furnace body 1 with a maximum temperature of 1100 °C, the burner 401 can be a gas burner. By precisely regulating the input of natural gas and air (or oxygen), the natural gas and the air blown in by the high-pressure blower are fully and evenly mixed in the burner head, and the ignition device ignites the mixed gas, and the flame sprays out from the nozzle, providing a stable high-temperature heat source for the incinerator.

[0065] As shown in Figure 4 and Figure 16 shown, the deflection baffle 402 is connected to a switching shaft 403 rotatably mounted on the side of the furnace body 1. An eccentric block 404 is fixed to the outer end of the switching shaft 403, and the eccentric block 404 can be rotated by a cylinder 405 to realize the switching of the flame jet direction. Initially, the flame jet direction is towards the bottom of the rotary drum 201; after switching, the flame jet direction is towards the spherical container 302.

[0066] As shown in Figure 6 shown, in some embodiments, the electric servo drive mechanism 7 includes a servo motor 701 whose rotation angle is precisely controlled by a controller. The servo motor 701 is installed outside the furnace body 1 and drives the rotation shaft 203 of the rotary drum 201 through a first sprocket drive mechanism. When the servo motor 701 rotates the rolling part 206 of the rotary drum 201 to the lower part and maintains a pendulum-like forward and reverse rotation, the burner 401 heats the rolling part 206 of the rotary drum 201, so that the inside is maintained at 400 - 900 °C, and the material is gradually carbonized. The rolling balls 208 repeatedly roll and grind the carbonized material. At this time, the vibrator 604 can concentrate the crushed material to the bottom of the rolling part 206 and be repeatedly rolled by the rolling balls 208. Until there is no liquid substance inside, the screening part 205 of the rotary drum 201 is rotated to the lower part by the servo motor 701 and maintains a pendulum-like forward and reverse rotation. At this time, the material smaller than the screening gap 207 gradually falls from the screening gap 207. If there are still larger materials, the rolling part 206 of the rotary drum 201 is continuously rotated to the lower part and maintains a pendulum-like forward and reverse rotation until all the materials fall from the screening gap 207 into the vibration grinding assembly 3. At this time, by rotating the deflection baffle 402, the flame jet direction of the burner 401 is deflected from the direction of the rotary drum 201 to the direction of the vibration grinding assembly 3, that is, the flame is sprayed obliquely from above to obliquely below.

[0067] The first sprocket drive mechanism includes a first drive sprocket 702, a first rotating sprocket 703, and a first chain 704. The first drive sprocket 702 is installed on the rotating shaft of the servo motor 701, the first rotating sprocket 703 is installed on the rotating shaft 203 of the rotary drum 201, and the first drive sprocket 702 and the first rotating sprocket 703 are driven by the first chain 704. The first drive sprocket 702 and the first rotating sprocket 703 are arranged in the sandwich of the rotary drum bin 101 of the furnace body 1.

[0068] As shown in Figure 4 and Figure 6 and Figure 8As shown in the figure, the vibration grinding assembly 3 includes a hopper 301 fixed in the combustion chamber 102 and a spherical container 302 arranged in the middle of the hopper 301 and concave downward. The hopper 301 and the spherical container 302 are made of ceramic material. A number of first grinding balls 303 are placed in the spherical container 302. A circular grinding channel 304 is provided at the bottom of the spherical container 302. A second grinding ball 305 for grinding the discharged material into powder is installed in the grinding channel 304. The first grinding balls 303 and the second grinding balls 305 are ceramic balls. The diameter of the first grinding balls 303 is 2 - 5 mm, and the diameter of the second grinding balls 305 is 30 - 50 mm. The gap between the second grinding balls 305 and the grinding channel 304 is wider at the top and narrower at the bottom. The wider upper part is convenient for feeding, and the narrowest part at the bottom is 50 - 200 μm.

[0069] When the material falls on the hopper 301 and the spherical container 302, the flame of the burner 401 is sprayed and burned directly at the spherical container 302. Under the vibration of the vibration chassis 6, the material particles are concentrated in the spherical container 302 and come into full contact with and are ground by the first grinding balls 303 to form smaller powders, which gradually sink to the bottom of the spherical container 302.

[0070] The second grinding balls 305 are fixed to a drive shaft 306 rotatably installed on the furnace body 1. The drive shaft 306 is rotatably installed on the furnace body 1 by means of packing seal. The drive shaft 306 is driven to rotate by an external power mechanism, so as to drive the second grinding balls 305 to rotate slowly. It can rotate forward for a period of time and then reverse for a period of time. The powder at the bottom is ground and discharged, and finally solid ashes are generated and fall into the pull-out ash storage box 104.

[0071] The feeding structure composed of the second grinding balls 305 and the grinding channel 304 has at least the following four functions:

[0072] (1) By using the friction between the second grinding balls 305 and the grinding channel 304, the powder can be finally ground into finer ashes, the combustion is more complete, and the sterilization and disinfection are more thorough;

[0073] (2) The continuously rotating second grinding balls 305 can also prevent the grinding channel 304 from being blocked. Compared with the existing incinerator that needs to frequently clean the ash outlet, the ash discharge of this incinerator is not easily blocked;

[0074] (3) When the second grinding balls 305 rotate, the top of the second grinding balls 305 rubs against the first grinding balls 303 in contact, which can not only improve the grinding effect, but also help to stir the powder at the bottom and make the grinding more efficient;

[0075] (4) When incinerating medical waste with needles, the metal needles are blocked by the second grinding ball 305 and do not enter the circular grinding channel 304, achieving the purpose of separating the metal needles, which is beneficial for recycling through the access hole 110 provided on the side of the combustion chamber 102 of the furnace body 1 (such as Figure 4 ).

[0076] Such as Figure 3 , Figures 9 - 12 As shown, the negative pressure adsorption device 5 is connected to the furnace body 1. The negative pressure adsorption device 5 sucks the inside of the furnace body 1 to maintain a negative pressure state inside the furnace body 1. A pre - flue gas disinfection mechanism 8 for disinfecting the extracted exhaust gas is installed at the intake end of the negative pressure adsorption device 5.

[0077] In some embodiments, the pre - flue gas disinfection mechanism 8 includes a flue gas collection hood 801, a spiral tube 802, and a connecting pipe 803. The flue gas collection hood 801 is arranged on the top of the rotary drum bin 101. The flue gas collection hood 801 is connected to the spiral tube 802 provided between the nozzle of the burner 401 and the deflection baffle 402 through the connecting pipe 803. The other end of the spiral tube 802 is connected to the negative pressure adsorption device 5 through the connecting pipe 803. The flue gas collection hood 801, the spiral tube 802, and the connecting pipe 803 are all made of ceramic material.

[0078] The temperature of the high - temperature flame ejected by the burner 401 is controlled at about 1100 °C. When the furnace body 1 is at its maximum negative pressure, the time for the gas flow to pass through the spiral tube 802 is greater than 2 s, which can enable the flue gas passing through the spiral tube 802 to be fully sterilized at high temperature and can fully decompose dioxin, and then the gas is discharged from the furnace body 1.

[0079] In some embodiments, the negative pressure adsorption device 5 includes:

[0080] A negative pressure fan 501, which is connected to the furnace body 1 and sucks the inside of the furnace body 1 to maintain the negative pressure state of the furnace body 1;

[0081] A cyclone separator 502, which is connected between the negative pressure fan 501 and the furnace body 1 and is used for gas - solid separation of the flue gas. The intake end of the cyclone separator 502 is connected to the pre - flue gas disinfection mechanism 8 arranged inside the furnace body 1;

[0082] An absorption tank 503, which is connected between the cyclone separator 502 and the negative pressure fan 501 and is used for adsorbing and filtering the flue gas after gas - solid separation.

[0083] In some embodiments, the absorption tank 503 is a sealed tank body. The intake end is arranged at the bottom of the absorption tank 503, and the exhaust end is provided at the top of the absorption tank 503. A circulating water cooling pipe 504 and a filter adsorption layer 505 are arranged from bottom to top. Among them, a wire mesh layer 506 is welded on the outer surface of the circulating water cooling pipe 504.

[0084] The cooling water in the cooling water tank is pumped into the circulating water cooling pipe 504 by a water pump and then flows back to the cooling water tank to cool the passing gas in a cycle. The steel wire mesh layer 506 is conducive to the gas fully releasing heat and reducing the gas temperature below 70°C. The filter adsorption layer 505 adopts an activated carbon adsorption filter layer, which can adsorb the toxic and harmful substances in the tail gas and discharge it up to the standard.

[0085] As Figure 4 shown, in some embodiments, a sealed air mixing chamber 105 is further provided in the furnace body 1. The air outlet end of the pre - placed flue gas disinfection mechanism 8 is communicated with the bottom of the air mixing chamber 105. The upper part of the air mixing chamber 105 is communicated with the air inlet end of the cyclone separator 502. A mixing air pipe 106 is sealed and inserted into the top of the air mixing chamber 105. A one - way valve 107 that only allows gas to flow in is arranged at the top end of the mixing air pipe 106. An adjustable air inlet valve 108 is arranged at the air inlet end of the one - way valve 107. The adjustable air inlet valve 108 is connected with a cold air supply pipe. A series of air inlet holes 109 are opened on the pipe wall of the mixing air pipe 106 located in the air mixing chamber 105.

[0086] In order to prevent the generation of dioxins, the temperature of the gas flowing out of the air outlet end of the pre - placed flue gas disinfection mechanism 8 is kept above 600°C. The refrigerant gas is introduced into the air mixing chamber 105 through the adjustable air inlet valve 108. The refrigerant gas can be the gas evaporated from liquid nitrogen. The high - temperature gas flowing out is rapidly cooled, and the high - temperature gas is quickly cooled from 600°C to below 200°C to prevent the re - generation of dioxins. Among them, the adjustable air inlet valve 108 can adjust the mixing ratio of the refrigerant gas and the hot air to achieve the purpose of rapid cooling.

[0087] Through the cooperation of the pre - placed flue gas disinfection mechanism 8 and the air mixing chamber 105, it can not only fully sterilize and disinfect at high temperature, but also rapidly cool to prevent the generation of harmful substances such as dioxins. It also creates better temperature conditions for subsequent cooling and adsorption, which is beneficial to improving the adsorption effect of the activated carbon in the filter adsorption layer 505.

[0088] As Figures 13 - 15 shown, in some embodiments, equally - spaced tooth grooves 209 are provided on the outer circumferential side of the rotating cylinder 201. A cleaning gear roller 210 meshing with the tooth grooves 209 of the rotating cylinder 201 is installed in the furnace body 1. The screening gap 207 of the screening part 205 is formed by digging through the tooth grooves 209 outward at the inner circumference of the rotating cylinder 201. When the cleaning gear roller 210 rolls to the screening part 205, the materials blocked in the screening gap 207 are pressed into the interior of the rotating cylinder 201. The outer end of the cleaning gear roller 210 drives the second grinding ball 305 to rotate through the second sprocket drive mechanism.

[0089] As Figure 8 、 Figure 16As shown, without adding more power mechanisms, the cleaning gear roller 210 is driven to rotate by using the power of the original rotary drum 201. The cleaning gear roller 210 is rotationally installed on the furnace body 1 through a stuffing box sealing structure. The second sprocket drive mechanism includes a second driving sprocket 211, a second driven sprocket 212, and a second chain 213. A second driving sprocket 211 is fixed to the outer end of the cleaning gear roller 210, and a second driven sprocket 212 is fixed to the same side of the drive shaft 306 fixed to the central axis of the second grinding ball 305. The second driving sprocket 211 and the second driven sprocket 212 are connected and driven by the second chain 213.

[0090] The cleaning gear roller 210 has at least the following two functions: (1) The cleaning gear roller 210 is driven by the power of the rotary drum 201, so that the cleaning gear roller 210 can be inserted into the screening gap 207 for cleaning to prevent the screening gap 207 from being blocked; (2) The cleaning gear roller 210 itself drives the second grinding ball 305 to rotate through the second driving sprocket 211 and the second driven sprocket 212, so as to realize the grinding of materials without an additional power source.

[0091] This structure adopts a single power source, that is, the electric servo drive mechanism 7, to provide power for the rolling of the rotary drum 201, the rolling of the cleaning gear roller 210, and the rotation of the second grinding ball 305. It saves costs and optimizes the drive structure of the incinerator.

[0092] During the incineration of small animal carcass bones, a high temperature of 800 - 1100 °C is required to be completely converted into ashes, which can be specifically divided into the following stages:

[0093] (1) Initial combustion stage (400 - 900 °C), the burner 401 indirectly burns the materials in the rotating incineration assembly 2.

[0094] In the initial stage, the materials are put in, the burner 401 is started, and then the negative pressure adsorption device 5 is started to keep the negative pressure in the furnace body 1 between - 10 Pa and - 50 Pa. The deflection baffle 402 aligns the flame sprayed by the burner 401 to heat the rotary drum 201, and the flame temperature is controlled at 1000 - 1100 °C, and the temperature in the rotary drum 201 is at least 400 - 900 °C. In this stage, the fat, muscle, and soft tissues in the small animal carcass are mainly burned in the rotary drum 201, releasing carbon dioxide and water. Gradually, the inorganic components (such as calcium phosphate) in the bones start to carbonize, and the bone collagen further decomposes, and the bones gradually become brittle and break into pieces. At this time, the form of the bone ash is not powder but block fragments, which are crushed by the rolling balls 208 to form particles that can pass through the screening gap 207 and fall into the vibration grinding assembly 3.

[0095] (2) Complete ashing stage (900 - 1100 °C), the burner 401 directly incinerates the materials in the vibration grinding assembly 3.

[0096] The deflection baffle 402 aligns the flame ejected by the burner 401 towards the spherical container 302. The flame of the burner 401 is directly ejected onto the particles and the first grinding balls 303. The combustion chamber 102 can reach 900 - 1100 °C. Under the action of the vibrating chassis 6, the first grinding balls 303 can not only play a grinding role but also play a role in heat storage and incineration. At this time, the remaining small bone particles will be further oxidized and collided, rubbed, and ground by the first grinding balls 303. The vibrating chassis 6 not only provides power to the first grinding balls 303 but also can gather the materials in the spherical container 302 by vibration. Finally, through the cooperation of the second grinding balls 305 and the grinding channel 304, the materials are ground into ashes.

[0097] (3) Negative pressure flue gas treatment. During the above incineration process, the small animal carcasses are completely burned, forming solid ashes that fall into the pull-out ash box 104. A small amount of flue gas is extracted by the negative pressure adsorption device 5 and is disinfected by the pre-positioned flue gas disinfection mechanism 8 in sequence, rapidly cooled in the air mixing chamber 105, and gas-solid separated by the cyclone separator 502. Finally, secondary cooling is completed in the absorption tank 503, and after passing through the activated carbon adsorption and filtration layer, it is discharged up to the standard.

[0098] During the above process, high-temperature incineration can effectively sterilize, avoid the spread of pathogens, and the main components of the generated bone ash are minerals (such as calcium phosphate, calcium carbonate, etc.), which are harmless to the human body. The generated flue gas is purified by the negative pressure adsorption device 5 and discharged up to the standard.

[0099] The rotating drum 201 and the burner 401 are used in cooperation to burn the frozen and crushed small hospital animal carcasses. The electric servo drive mechanism 7 is used to control the materials in the rolling part 206, enabling all-round heating and burning of the materials without dead angles. After the materials are burned, the surface carbonized layer will be rolled and crushed by the rolling balls 208 until the materials are fully burned into smaller particles. Then, the electric servo drive mechanism 7 controls the screening part 205 of the rotating drum 201 to rotate to the lower part, and the materials are discharged through the screening gap 207 and fall into the vibrating grinding assembly 3 for secondary incineration; the flame of the burner 401 directly burns the material particles, and the vibrator 604 vibrates the small particle materials into the spherical container 302 in the middle, where they are further ground and burned by the first grinding balls 303 to become smaller ashes, and after being ground by the grinding channel 304, they fall into the pull-out ash box 104. The rotating drum 201 has basically no combustion dead angles, the combustion is more complete, and the infection risk during the treatment of the ashes is reduced.

[0100] This structure can also handle the hospital's waste medical supplies, such as disposable infusion supplies with sharp instruments like infusion needles, injection needles, blood collection needles, etc. The sharp instruments are separated from the ashes on the upper surface of the double-layer microporous ceramic sieve and can be recycled.

[0101] By using the negative pressure adsorption device 5 with a sterilization structure, the flue gas extracted from the furnace body 1 can be sterilized more thoroughly, so that the flue gas extracted from the incinerator basically eliminates the infection risk even after the external negative pressure adsorption device 5 is saturated with adsorption.

[0102] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A small-scale harmless incinerator for experimental animal carcasses, characterized in that: include: A furnace body (1), wherein the furnace body (1) is integrally formed by an upper rotary silo (101) and a lower combustion silo (102), and the furnace body (1) is mounted on a vibrating chassis (6); A rotary incineration assembly (2), the rotary incineration assembly (2) comprising a rotary drum (201) rotatably mounted in a rotary drum silo (101), and an electric servo drive mechanism (7) for driving the rotary drum (201) to rotate, the circumferential side surface of the rotary drum (201) being divided into a screening portion (205) and a rolling portion (206), the screening portion (205) of the rotary drum (201) being provided with a screening gap (207), and a plurality of rolling balls (208) having a diameter greater than the width of the screening gap (207) being placed inside the rotary drum (201); The electric servo drive mechanism (7) comprises a servo motor (701) whose rotation angle is precisely controlled by a controller. The servo motor (701) is installed outside the furnace body (1) and drives the rotating shaft (203) of the rotating drum (201) to rotate through a first sprocket drive mechanism. When the servo motor (701) rotates the rolling part (206) of the rotating drum (201) to the lower part and maintains the pendulum-like forward and reverse rotation, the burner (401) rotates the rolling part (206) of the rotating drum (201) to the lower part. 206) is heated to carbonize the material, and the rolling balls (208) roll and grind the carbonized material. At this time, the vibrating chassis (6) can collect the crushed material to the bottom of the rolling part (206), and the rolling balls (208) are repeatedly rolled. When the servo motor (701) rotates the screening part (205) of the rotating drum (201) to the bottom and maintains the pendulum-like forward and reverse rotation, the material smaller than the screening gap (207) gradually falls from the screening gap (207); A vibration grinding assembly (3), the vibration grinding assembly (3) comprising a hopper (301) fixed in a combustion chamber (102) and a spherical container (302) arranged in the middle of the hopper (301), a plurality of first grinding balls (303) being placed in the spherical container (302), a circular grinding channel (304) being arranged at the bottom of the spherical container (302), and a second grinding ball (305) for grinding the output material into powder being installed in the grinding channel (304); A burner assembly (4), the burner assembly (4) comprising a burner (401) installed in a combustion chamber (102), and a deflection baffle (402) rotatably installed in front of a nozzle of the burner (401) for changing a flame spraying direction; A negative pressure adsorption device (5) is connected to the furnace body (1), the negative pressure adsorption device (5) sucks the interior of the furnace body (1) to maintain the interior of the furnace body (1) in a negative pressure state, and a pre-smoke disinfection mechanism (8) for disinfecting the extracted exhaust gas is installed at the air inlet end of the negative pressure adsorption device (5).

2. According to claim 1, a small-scale harmless incinerator for experimental animal carcasses, characterized in that: The front smoke disinfection mechanism (8) comprises a smoke collection hood (801), a spiral tube (802), and a connecting pipe (803); the smoke collection hood (801) is arranged on the top of the rotary silo (101); the smoke collection hood (801) is connected to the spiral tube (802) arranged between the nozzle of the burner (401) and the deflection baffle (402) through the connecting pipe (803); the other end of the spiral tube (802) is connected to the negative pressure adsorption device (5) through the connecting pipe (803).

3. According to claim 1, a small-scale harmless incinerator for experimental animal carcasses, characterized in that: The negative pressure adsorption device (5) comprises: A negative pressure fan (501) is connected to the furnace body (1) and sucks the interior of the furnace body (1) to maintain a negative pressure state of the furnace body (1); A cyclone separator (502) is connected between the negative pressure fan (501) and the furnace body (1) and is used for performing gas-solid separation on the flue gas. The air inlet end of the cyclone separator (502) is connected to a pre-flue gas disinfection mechanism (8) arranged in the furnace body (1); The absorption tank (503) is connected between the cyclone separator (502) and the negative pressure fan (501) and is used for adsorption and filtration of the flue gas after gas-solid separation.

4. A small-scale harmless incinerator for experimental animal carcasses according to claim 3, characterized in that: The absorption tank (503) is a sealed tank body, an air inlet end is arranged at the bottom of the absorption tank (503), an exhaust end is arranged at the top of the absorption tank (503), and a circulating water cooling pipe (504) and a filtering adsorption layer (505) are arranged in sequence from bottom to top, wherein a steel wire mesh layer (506) is welded on the outer surface of the circulating water cooling pipe (504).

5. According to claim 3, a small-scale harmless incinerator for experimental animal carcasses is characterized in that: The furnace body (1) is further provided with a sealed air mixing chamber (105), the air outlet end of the front smoke disinfection mechanism (8) is connected to the bottom of the air mixing chamber (105), the upper part of the air mixing chamber (105) is connected to the air inlet end of the cyclone separator (502), a mixing air pipe (106) is sealed and inserted into the top of the air mixing chamber (105), a one-way valve (107) that only allows gas to flow in is provided at the top of the mixing air pipe (106), an adjustable air inlet valve (108) is provided at the air inlet end of the one-way valve (107), and the adjustable air inlet valve (108) is connected to a cold air supply pipe, and a series of air inlet holes (109) are opened on the wall of the mixing air pipe (106) located in the air mixing chamber (105).

6. The small-scale harmless incinerator for experimental animal carcasses according to claim 1 is characterized in that: The first sprocket drive mechanism comprises a first driving sprocket (702), a first rotating sprocket (703) and a first chain (704); the first driving sprocket (702) is mounted on the rotating shaft of the servo motor (701); the first rotating sprocket (703) is mounted on the rotating shaft (203) of the rotating drum (201); the first driving sprocket (702) and the first rotating sprocket (703) are driven by the first chain (704).

7. The small-scale harmless incinerator for experimental animal carcasses according to claim 1 is characterized in that: The vibration chassis (6) comprises a base (601), a vibration seat (603) mounted above the base (601) via a plurality of elastic members (602), and a vibrator (604) mounted on the vibration seat (603); a furnace body (1) is fixed on the vibration seat (603).

8. The small-scale harmless incinerator for experimental animal carcasses according to claim 1 is characterized in that: The outer circumferential side surface of the rotating drum (201) is provided with tooth grooves (209) at equal intervals. A cleaning gear roller (210) meshing with the tooth grooves (209) of the rotating drum (201) is installed in the furnace body (1). The screening gap (207) of the screening part (205) is formed by digging the tooth grooves (209) outward at the inner circumference of the rotating drum (201). When the cleaning gear roller (210) rolls to the screening part (205), the material blocked in the screening gap (207) is pressed into the interior of the rotating drum (201). The outer end of the cleaning gear roller (210) drives the second grinding ball (305) to rotate through a second sprocket drive mechanism.

9. The small-scale harmless incinerator for experimental animal carcasses according to claim 1, characterized in that: A pull-out ash storage box (104) is provided at the bottom of the combustion chamber (102).

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