CN216550091U

CN216550091U - Medical wastewater sludge disinfection system

Info

Publication number: CN216550091U
Application number: CN202123278316.1U
Authority: CN
Inventors: 侯江; 张韵洁; 雍毅; 郭卫广; 尹朝阳; 薛嘉
Original assignee: SICHUAN ACADEMY OF ENVIRONMENTAL SCIENCES
Current assignee: SICHUAN ACADEMY OF ENVIRONMENTAL SCIENCES
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-05-17
Anticipated expiration: 2031-12-23

Abstract

The utility model discloses a medical wastewater sludge disinfection system which comprises a sludge feeding unit, a sludge mixing unit, a sludge preheating unit and a cooking unit, wherein a medicament adding unit and an exhaust pipe are arranged on the sludge mixing unit, and the exhaust pipe is communicated with a gas purification device; the boiling unit comprises a sludge tank truck and a high-temperature steam sterilization cabinet, one end of the high-temperature steam sterilization cabinet is provided with a heat-insulation sealing door, the high-temperature steam sterilization cabinet is provided with a steam inlet, an exhaust port and a safety valve, the exhaust port is connected with a gas purification device, and the outer wall of the high-temperature steam sterilization cabinet is provided with a heat-insulation layer. The system can effectively solve the problems of incomplete disinfection, high energy consumption, secondary harmful substance generation and environmental influence control in the existing medical sludge treatment process.

Description

Medical wastewater sludge disinfection system

Technical Field

The utility model belongs to the technical field of hazardous waste treatment devices, and particularly relates to a medical wastewater and sludge disinfection system.

Background

Medical wastewater sludge is produced in a sewage treatment process in hospitals, may contain pathogenic microorganisms and parasite eggs, belongs to hazardous waste, and should be managed and disposed according to the hazardous waste. According to the requirement of treatment regulations, the infectious medical wastes can be subjected to centralized incineration treatment by units with corresponding hazardous waste treatment qualifications, or subjected to centralized disinfection treatment and then buried in a household garbage landfill or incinerated in a household garbage incineration plant. At present, domestic infectious medical wastes are mostly treated by adopting an incineration method and a high-temperature steam sterilization method, but medical wastewater sludge has the characteristics of high water content, easiness in decay and odor generation and the like compared with common infectious medical wastes, the high-temperature steam sterilization method is directly adopted for treating the wastes, the energy consumption is high, a large amount of odor is easily generated under the high-temperature condition, the steam is difficult to penetrate, and incomplete disinfection is easily caused.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects, the utility model provides a medical wastewater and sludge disinfection system which can effectively solve the problems of incomplete disinfection, high energy consumption, heavy odor and easy environmental pollution in the existing high-temperature treatment process of sludge production.

In order to achieve the purpose, the technical scheme adopted by the utility model for solving the technical problems is as follows:

a medical wastewater sludge disinfection system comprises a sludge feeding unit, a sludge mixing unit, a sludge preheating unit and a cooking unit, wherein a medicament adding unit and an exhaust pipe are arranged on the sludge mixing unit, and the exhaust pipe is communicated with a gas purification device; the boiling unit comprises a sludge tank truck and a high-temperature steam sterilization cabinet, a heat-preservation sealing door is arranged at one end of the high-temperature steam sterilization cabinet, the high-temperature steam sterilization cabinet is provided with a steam inlet, an exhaust port and a safety valve, the exhaust port is connected with a gas purification device, and a heat-preservation layer is arranged on the outer wall of the high-temperature steam sterilization cabinet.

Further, the sludge feeding unit comprises a sludge hopper and a screw conveying device.

In the scheme, the sludge hopper is communicated with the spiral conveying device, and the sludge is conveyed to the sludge mixing unit through the spiral conveying device. After the sludge enters the mixing unit, a disinfectant is added into the sludge through the disinfectant adding unit, the sludge and the disinfectant are uniformly mixed under the stirring action of the mixing stirrer and then are conveyed to the sludge preheating unit, the preheated sludge is discharged into the sludge tank truck, the sludge tank truck filled with the sludge is transferred into the high-temperature steam sterilization cabinet, high-temperature steam is introduced into the sludge sterilization cabinet through the steam inlet, the temperature of the sludge is increased by utilizing the high-temperature steam, the disinfection can be realized at relatively low temperature due to the addition of the disinfectant, the amount of odor generated in the disinfection process can be reduced, a small amount of odor generated in the disinfection process is discharged into the gas purification device through the exhaust port to realize deodorization treatment, and the gas purification device is an existing device and can realize removal of the odor and disinfection of the gas.

Further, the sludge mixing unit comprises a mixing stirrer, a feed hopper is arranged on the mixing stirrer, and a stirring paddle is arranged inside the mixing stirrer.

In the above scheme, the feeder hopper communicates with the discharge end of mud feed unit, rotates through the stirring rake, realizes the mixture of mud and disinfectant, also conveys mud to next processing unit when mixing, realizes the serialization processing of mud.

The agent adding unit comprises an agent barrel with a metering valve, and a disinfectant is filled in the agent barrel and is used for disinfecting the sludge.

The odor can be generated in the mixing process after the medicament is added, and is discharged into the gas purification device through the exhaust pipe, so that the odor is treated, and the odor pollution is reduced.

Further, the sludge preheating unit comprises a spiral conveying preheater, a heating device is arranged inside the spiral conveying preheater, and a feeding hole and a discharging hole are formed in the side wall of the spiral conveying preheater.

Further, the outer wall of the spiral conveying preheater is provided with a heat insulation layer.

In the above scheme, heating device can be hollow intermediate layer, lets in high temperature steam or high temperature water in the intermediate layer, also can be electric heater unit, realizes heating the unit inside preheating sludge unit through heating device. Discharging the sludge containing the disinfectant into a sludge preheating unit, and preheating the sludge by a heating device; the heat-insulating layer is arranged outside the spiral conveying preheater, so that the temperature loss is reduced.

In summary, the utility model has the following advantages:

1. be provided with mud feed unit, mud mixing unit, mud in this application and preheat the unit and the unit of cooking, mud passes through above-mentioned unit in proper order after, realizes the disinfection to mud, through above-mentioned device, can realize the serialization disinfection of mud and handle, improves the disinfection efficiency of mud.

2. Through throwing in the mud in this application with after the disinfectant through the mud preheating unit can make the miscellany material rapid heating up, the disinfection process has utilized the stack disinfection effect of disinfectant and temperature, can exterminate harmful germ and parasitic ovum in the medical wastewater mud effectively, reduces the treatment temperature, the production of the stink that has significantly reduced. The equipment has the characteristics of energy consumption reduction, thorough disinfection, simple equipment and easy maintenance.

Drawings

FIG. 1 is a schematic diagram of the system;

wherein, 1, a sludge feeding unit; 2. a sludge mixing unit; 3. a sludge preheating unit; 4. a cooking unit; 5. a medicament adding unit; 6. an exhaust pipe; 7. a sludge tank truck; 8. a high-temperature steam sterilization cabinet; 9. a steam inlet; 10. an exhaust port; 11. a safety valve; 12. a sludge hopper; 13. a mixing agitator; 14. a feed hopper; 15. a stirring paddle; 16. a screw conveying preheater; 17. a heating device; 18. a feed inlet; 19. a discharge port; 20. and (7) an insulating layer.

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings.

In one embodiment of the utility model, as shown in fig. 1, a medical wastewater and sludge disinfection system is provided, which is characterized by comprising a sludge feeding unit 1, a sludge mixing unit 2, a sludge preheating unit 3 and a cooking unit 4, wherein a medicament adding unit 5 and an exhaust pipe 6 are arranged on the sludge mixing unit 2, and the exhaust pipe 6 is communicated with a gas purification device; the cooking unit 4 comprises a sludge tank truck 7 and a high-temperature steam sterilization cabinet 8, one end of the high-temperature steam sterilization cabinet 8 is provided with a heat-insulation sealing door, the high-temperature steam sterilization cabinet 8 is provided with a steam inlet 9, an exhaust port 10 and a safety valve 11, and the exhaust port 10 is connected with the gas purification device.

Optimally, the sludge feeding unit 1 comprises a sludge hopper 12 and a screw conveyor.

Optimally, the sludge mixing unit 2 comprises a mixing stirrer 13, a feed hopper 14 is arranged on the mixing stirrer 13, and a stirring paddle 15 is arranged inside the mixing stirrer 13.

Optimally, the sludge preheating unit 3 comprises a spiral conveying preheater 16, a heating device 17 is arranged inside the spiral conveying preheater 16, and the spiral conveying preheater 16 is provided with a feeding hole 18 and a discharging hole 19.

Optimally, the outer wall of the spiral conveying preheater 16 is provided with an insulating layer 20.

The use process of the device is as follows: adding medical sludge through a sludge hopper 12, then conveying to a sludge mixing unit 2 through a sludge feeding unit 1, adding a disinfectant into the sludge mixing unit 2 through a reagent adding unit 5, uniformly mixing the sludge and the disinfectant under the action of a mixing stirring paddle 15, then conveying to a sludge preheating unit 3 under the conveying action of the mixing stirring paddle 15, in the sludge preheating unit 3, along with the conveying process, the sludge close to the outer layer of the inner wall receives heat from steam in the hollow interlayer, so that the temperature is raised, through the rotation of a spiral mandrel, the convection heat transfer of the sludge at the inner layer and the sludge at the outer layer is promoted, and the heat utilization efficiency is high. And (3) discharging the sludge preheated to 80 ℃ into a sludge tank truck 7, pushing the sludge tank truck 7 into a high-temperature steam sterilization cabinet 8, closing a sealing door, introducing steam from a steam inlet 9, raising the temperature in the high-temperature steam sterilization cabinet 8 to 50-80 ℃, maintaining the temperature for 1-4 hours, completing the sterilization process, and then discharging the steam through an exhaust port 10, thus pushing out the sludge tank truck.

While the present invention has been described in detail with reference to the illustrated embodiments, it should not be construed as limited to the scope of the present patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims

1. The medical wastewater and sludge disinfection system is characterized by comprising a sludge feeding unit (1), a sludge mixing unit (2), a sludge preheating unit (3) and a cooking unit (4), wherein a medicament adding unit (5) and an exhaust pipe (6) are arranged on the sludge mixing unit (2), and the exhaust pipe (6) is communicated with a gas purification device; the cooking unit (4) comprises a sludge tank truck (7) and a high-temperature steam sterilization cabinet (8), one end of the high-temperature steam sterilization cabinet (8) is provided with a heat-insulation sealing door, the high-temperature steam sterilization cabinet (8) is provided with a steam inlet (9), an exhaust port (10) and a safety valve (11), and the exhaust port (10) is connected with the gas purification device.

2. Medical wastewater sludge disinfection system according to claim 1, wherein the sludge feed unit (1) comprises a sludge hopper (12) and a screw conveyor.

3. Medical wastewater sludge disinfection system according to claim 2, wherein the sludge mixing unit (2) comprises a mixing agitator (13), wherein a feed hopper (14) is arranged on the mixing agitator (13), and wherein a stirring paddle (15) is arranged inside the mixing agitator (13).

4. Medical wastewater sludge disinfection system according to claim 2, wherein the sludge pre-heating unit (3) comprises a screw conveyor pre-heater (16), wherein a heating device (17) is arranged inside the screw conveyor pre-heater (16), and wherein the screw conveyor pre-heater (16) is provided with a feed inlet (18) and a discharge outlet (19).

5. Medical wastewater sludge sterilization system according to claim 4 wherein the outer wall of the screw conveyor preheater (16) is provided with an insulation layer (20).