Method and equipment for reducing the amount of antibiotic sludge

Abstract

The present application relates to the technical field of antibiotic bacterial residue treatment, and particularly relates to a method and equipment for reducing antibiotic bacterial residue.The present application adopts hot air drying to dry the granular antibiotic bacterial residue to a moisture content of 10% to 28%, and the temperature of the hot air drying is 52 DEG C to 58 DEG C.The present application adopts hot air drying and limits the temperature of the hot air drying, so that the problems caused by incineration during the treatment of antibiotic bacterial residue can be solved, the antibiotic bacterial residue has high reduction efficiency, and the reduction rate is as high as 53%.The present application uses the equipment to treat antibiotic bacterial residue, the hot air drying process is completely closed, no waste gas is discharged, the reduction process does not change the chemical properties of the bacterial residue, no secondary pollution is generated, the amount of the bacterial residue after air drying is small, the bacterial residue is easy to package, store, transport and further disposed by harmless incineration, is conducive to protecting the ecological environment and human health, meets the strict environmental protection control requirements, and has very considerable economic benefits.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antibiotic bacterial residue treatment, and particularly relates to a method and equipment for reducing antibiotic bacterial residue. BACKGROUND

[0002] In the extraction process of fermentation antibiotics, a large amount of antibiotic bacterial residue is produced, which is mainly composed of microbial mycelium, residual sugar, cellulose, and a small amount of vitamins, inorganic salts, enzymes and other substances, and contains a small amount of antibiotic residues. The antibiotic bacterial residue is large in volume, high in viscosity, complex in composition, easy to deteriorate and produce volatile odor, and is not easy to store and transport. If the antibiotic bacterial residue is not properly disposed of, it will cause serious environmental pollution problems, and potential harm to the ecological environment and human health, and also bring major safety hazards and huge disposal cost pressure to enterprises.

[0003] At present, the most effective method for disposing a large amount of antibiotic bacterial residue is incineration. Incineration can greatly reduce the total amount of antibiotic bacterial residue in a short time, and the volume of the bacterial residue can be reduced to less than 5% of the original volume. However, when incinerating antibiotic bacterial residue, GB 18484-2020 "Hazardous Waste Incineration Pollution Control Standard" must be strictly implemented, and the conditions are strict. Except for a few antibiotic enterprises that have the conditions to build incinerators for harmless incineration and disposal of bacterial residue, most enterprises produce bacterial residue which is disposed of by qualified third-party disposal institutions for harmless incineration and standardized disposal. In addition, the antibiotic bacterial residue has a low calorific value and a high water content, usually 50% to 75%, and some bacterial residue even has a water content as high as 92%. After secondary pressing with a plate frame, the water content can be as high as 40% to 65%. In order to ensure standardized incineration, high-calorific-value heavy oil or natural gas fuel additives need to be added during the incineration process, which greatly increases the operation and energy consumption costs of incineration, causing great resource waste and increasing the disposal cost pressure of enterprises, which is not conducive to the protection of the ecological environment. SUMMARY

[0004] The present application aims to provide a method and equipment for reducing antibiotic bacterial residue, which effectively reduces the water content and reduction rate of antibiotic bacterial residue.

[0005] In order to achieve the above-mentioned application purposes, the present application provides the following technical solutions:

[0006] The present application provides a method for reducing antibiotic bacterial residue, comprising the following steps: drying granular antibiotic bacterial residue to a water content of 10% to 28% by hot air drying; and the temperature of the hot air drying is 52℃ to 58℃.

[0007] Preferably, the temperature of the hot air drying is 54℃ to 56℃.

[0008] Preferably, the hot air drying time is 50-120 min.

[0009] Preferably, the hot air drying air volume is 5000 m 3 / h-6000 m 3 / h.

[0010] Preferably, the initial moisture content of the antibiotic residue is 40%-65%.

[0011] Preferably, the granular antibiotic residue is dried to a moisture content of 15%-21%.

[0012] Preferably, the diameter of the granular antibiotic residue is 3.0 mm-5.0 mm.

[0013] Preferably, the thickness of the granular antibiotic residue is 12.0 mm-20.0 mm.

[0014] Preferably, the hot air drying uses a reduction device; the reduction device comprises a sealed air drying box, a conveying mesh belt, a circulating air chamber and an air conditioning refrigeration assembly, the outer side of the sealed air drying box is sealed with a circulating air chamber, the circulating air chamber is sequentially provided with an air induction fan and an evaporator and a condenser of the air conditioning refrigeration assembly, the sealed air drying box is provided with an air outlet and an air inlet, the air outlet is communicated with the air induction fan, the air inlet is communicated with the air outlet of the circulating air chamber, the sealed air drying box is provided with the conveying mesh belt, the conveying mesh belt is used for carrying the granular antibiotic residue, the initial end of the conveying mesh belt is connected with a feeding mechanism and the terminal end is connected with a residue collecting mechanism.

[0015] The application also provides a reduction device for antibiotic residue reduction, which comprises a sealed air drying box, a conveying mesh belt, a circulating air chamber and an air conditioning refrigeration assembly, the outer side of the sealed air drying box is sealed with a circulating air chamber, the circulating air chamber is sequentially provided with an air induction fan and an evaporator and a condenser of the air conditioning refrigeration assembly, the sealed air drying box is provided with an air outlet and an air inlet, the air outlet is communicated with the air induction fan, the air inlet is communicated with the air outlet of the circulating air chamber, the sealed air drying box is provided with the conveying mesh belt, the conveying mesh belt is used for carrying antibiotic residue, the initial end of the conveying mesh belt is connected with a feeding mechanism and the terminal end is connected with a residue collecting mechanism. Advantages

[0016] The application provides an antibiotic residue reduction method, which comprises the following steps: adopting hot air drying to dry granular antibiotic residue to a water content of 10-28%; and the temperature of the hot air drying is 52-58 DEG C.

[0017] Further, the antibiotic residue is treated by using the reduction equipment, the hot air drying process is completely closed, no waste gas is discharged, the reduction process does not change the chemical properties of the residue, no secondary pollution is generated, the residue is small in quantity after air drying, easy to package, store, transport and further disposal by harmless incineration, beneficial to protecting the ecological environment and human health, in line with the strict environmental protection control requirements, and the economic benefits are very considerable. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 The structure diagram of the reduction equipment used in the application;

[0020] Figure 2 The principle diagram of the reduction equipment used in the application;

[0021] In the figure: 1-cutting granulator, 2-residue collecting mechanism, 3-closed air drying box, 4-conveying net belt, 5-circulating air chamber, 6-air outlet, 7-air inlet, 8-inducing fan, 9-matching net belt, 10-feeding port, 11-discharging port, 12-evaporator, 13-condenser, 14-compressor, 15-throttle valve, 16-condensed water discharge pipe, 17-temperature sensor, 18-inclined surface. DETAILED DESCRIPTION

[0022] The application provides an antibiotic residue reduction method, which comprises the following steps: adopting hot air drying to dry granular antibiotic residue to a water content of 10-28%; and the temperature of the hot air drying is 52-58 DEG C.

[0023] As an optional solution, the antibiotic bacterial residue is extruded and granulated by a granulator to obtain granular antibiotic bacterial residue. As an optional solution, the initial water content of the antibiotic bacterial residue is 40% to 65%; as another embodiment, the initial water content of the antibiotic bacterial residue is 50% to 60%; as another embodiment, the initial water content of the antibiotic bacterial residue is 55%. As an optional solution, the diameter of the granular antibiotic bacterial residue is 3.0 mm to 5.0 mm; as another embodiment, the diameter of the granular antibiotic bacterial residue is 4.0 mm. The source of the antibiotic bacterial residue is not strictly required in the present application, and the by-product bacterial residue produced by microbial fermentation for preparing antibiotics can be used.

[0024] After obtaining the granular antibiotic bacterial residue, the granular antibiotic bacterial residue is dried to a water content of 10% to 28% by hot air drying. As an optional solution, the granular antibiotic bacterial residue is dried to a water content of 15% to 21% by hot air drying.

[0025] As an optional solution, the granular antibiotic bacterial residue is laid flat and then hot air dried. As an optional solution, the laying thickness of the granular antibiotic bacterial residue is 12.0 mm to 20.0 mm; as another embodiment, the laying thickness of the granular antibiotic bacterial residue is 15.0 mm to 18.0 mm; as another embodiment, the laying thickness of the granular antibiotic bacterial residue is 16.0 mm. As an optional solution, the granular antibiotic bacterial residue is laid flat on a conveying mesh belt.

[0026] As an optional solution, the temperature of the hot air drying is 54°C to 56°C; as another embodiment, the temperature of the hot air drying is 55°C. As an optional solution, the time of the hot air drying is 50 to 120 min; as another embodiment, the time of the hot air drying is 60 to 100 min; as another embodiment, the time of the hot air drying is 70 to 90 min; as another embodiment, the time of the hot air drying is 80 min. As an optional solution, the air volume of the hot air drying is 5000 m 3 / h to 6000 m 3 / h; as another embodiment, the air volume of the hot air drying is 5500 m 3 / h.

[0027] The method provided by the present application can reduce the water content of antibiotic bacterial residue to 10% to 28%, with a reduction rate of up to 53%, solving the related problems caused by incineration in the prior art.

[0028] As an optional solution, the hot air drying device uses a reducing device; the reducing device comprises a closed air drying box, a conveying mesh belt, a circulating air chamber and an air conditioning refrigeration assembly, the outer side of the closed air drying box is sealed and provided with a circulating air chamber, the circulating air chamber is sequentially provided with an air guide fan and an evaporator and a condenser of the air conditioning refrigeration assembly, the closed air drying box is provided with an air outlet and an air inlet, the air outlet is communicated with the air guide fan, the air inlet is communicated with the air outlet of the circulating air chamber, the closed air drying box is provided with the conveying mesh belt, the conveying mesh belt is used for carrying the granular antibiotic residue, the initial end of the conveying mesh belt is connected with a feeding mechanism, and the terminal end is connected with a residue collecting mechanism.

[0029] As an optional solution, the feeding mechanism is a strip cutting granulator, which is used for making the antibiotic residue after water extrusion into residue pellets or residue blocks with a maximum size of 3mm-5mm, and the material laying thickness is 12.0mm-20.0mm.

[0030] As an optional solution, the closed air drying box, the circulating air chamber and the air conditioning refrigeration assembly are provided with a plurality of groups in parallel and in series according to the water content of the antibiotic residue, and the side walls of the closed air drying boxes of adjacent two groups are matched and provided with a flow passage of the conveying mesh belt.

[0031] As an optional solution, the conveying mesh belt comprises an upper conveying belt and a lower conveying belt arranged in parallel, one end of the upper conveying belt is connected with the feeding mechanism through a feeding port, one end of the lower conveying belt is connected with the terminal end of the upper conveying belt for discharging material, the other end falls into a discharging port, the residue collecting mechanism is connected with the discharging port, and the feeding port and the discharging port are located in the same closed air drying box. As an optional solution, the upper conveying belt and the lower conveying belt are both stainless steel spring mesh belts arranged in a double-layer S-shaped staggered engagement mode, and the mesh hole diameter of the stainless steel spring mesh belt is 1mm-2mm. As an optional solution, a matching mesh belt is arranged below the upper conveying belt, the matching mesh belt is arranged obliquely towards the discharging end of the upper conveying belt, the matching mesh belt is a polyurethane ultra-thin mesh belt, the thickness of the matching mesh belt is 6mm-1.2mm, and the mesh hole diameter is 0.8mm-1.5mm.

[0032] As an optional solution, the circulating air chamber and the top plate and the bottom plate of the closed air drying box are respectively communicated, and the communication areas are uniformly provided with air holes; the top and the bottom of the closed air drying box are both provided with temperature sensors, and the bottom temperature of the closed air drying box is 50℃-60℃.

[0033] As an optional solution, the air volume of the air guide fan is 5000m 3 / h~6000m 3 / h.

[0034] As an optional solution, the air-drying time of the antibiotic bacterial residue from the feeding mechanism to the discharging mechanism is 50-90 minutes.

[0035] As an optional solution, the air-conditioning refrigeration assembly comprises an evaporator, a compressor, a condenser and a throttle valve connected in sequence by pipelines, the evaporator is located in the vertical section of the circulating air chamber, the condenser is located in the horizontal section at the bottom of the circulating air chamber, and the air outlet of the air blower passes through the evaporator and the condenser in sequence.

[0036] The antibiotic bacterial residue is treated by the reduction equipment, the hot air drying process is fully closed, no waste gas is discharged, the reduction process does not change the chemical properties of the bacterial residue, no secondary pollution is generated, the bacterial residue after air drying is small in amount, easy to package, store, transport and further disposal by harmless incineration, beneficial to protect the ecological environment and human health, and meets the strict environmental protection control requirements.

[0037] As Figures 1 to 2 shown, the embodiment of the application provides a reduction equipment for antibiotic bacterial residue reduction, which comprises a closed air-drying box 3, a conveying mesh belt 4, a circulating air chamber 5 and an air-conditioning refrigeration assembly, the outer side of the closed air-drying box 3 is sealed and provided with a circulating air chamber 5, the circulating air chamber 5 is sequentially provided with an air blower 8 and an evaporator 12 and a condenser 13 of the air-conditioning refrigeration assembly, the closed air-drying box 3 is provided with an air outlet 6 and an air inlet 7, the air outlet 6 is communicated with the air blower 8, the air inlet 7 is communicated with the air outlet 6 of the circulating air chamber 5, the closed air-drying box 3 is provided with the conveying mesh belt 4, the conveying mesh belt 4 is used for carrying antibiotic bacterial residue, the initial end of the conveying mesh belt 4 is connected with a feeding mechanism and the terminal end is connected with a residue collecting mechanism 2, the air inlet 7 enters low-temperature hot air, the initial antibiotic bacterial residue granular shaped material can be air-dried to have a water content of 10%-28%, and the discharged material is packaged, measured and stored in the warehouse.

[0038] As an optional solution, the feeding mechanism in the embodiment is a strip granulator 1, which is used to make the antibiotic residue after extrusion into residue pellets or residue blocks with a maximum size of 3-5 mm, and the laying thickness is 12-20 mm. In the embodiment, the initial granular forming material of the strip granulator 1 is a strip columnar forming material with a diameter of 3-5 mm, which is cut into 3-5 mm horizontal sections. The residue filter cake is granulated and formed, which is beneficial to uniform heating of the residue, sufficient air drying, saving of air drying energy, improvement of the reduction effect, low moisture of the granular material after air drying, and ease of standardized incineration disposal in the later period. Specifically, the antibiotic residue to be treated is first collected into a collection tank, which helps to prevent secondary pollution of the residue from scattering and odor before treatment. The residue is pushed to the strip granulator 1 for granulation and forming by a hydraulic double screw method. The viscous material is easily and smoothly fed into the strip granulator 1 by the hydraulic device cooperating with the double screw conveyor, and the initial granular forming material is obtained. In the embodiment, the initial moisture content of the residue can be 50-60%. If the initial moisture content of the residue is too high, the residue cannot be granulated and formed or the residue is re-bonded into blocks after granulation and forming, which affects the reduction effect. If the moisture content is too low, more fine powder is produced during the granulation and drying process, which affects the reduction effect and equipment maintenance, and the powder after drying is not conducive to further harmless incineration and standardized disposal in the later period. The moisture content of the residue after drying is preferably 15-21%, and more preferably 18-21%.

[0039] As an optional solution, the closed air drying box 3, the circulating gas chamber 5 and the air conditioning refrigeration assembly in the embodiment are provided in several groups according to the moisture content of the antibiotic residue, and the side walls of the closed air drying boxes 3 of adjacent two groups are attached and provided with a flow-through opening of the conveying mesh belt 4. In the embodiment, the closed air drying box 3 can be an array of independent box type split module assemblies, each module assembly is provided with an independent air suction fan 8, a compressor 14, an evaporator 12 and a condenser 13, and a conveying mesh belt 4 of a corresponding length is arranged at the side opening of the closed air drying box 3. The independent box type split module assemblies can be combined in series to form a row of air drying boxes. The number of groups can be determined according to the drying time and drying effect to achieve the best number of groups, which can not only achieve the best reduction efficiency but also avoid excessive drying and waste of energy. The residue amount is greatly reduced, and the best economic benefit is achieved. In addition, the split module assembly design is beneficial to single repair when a fault occurs, which does not affect the operation and helps to ensure the reduction rate and further reduce the operation cost and maintenance cost.

[0040] As an optional solution, the conveying mesh belt 4 in the embodiment includes an upper conveying belt and a lower conveying belt arranged in parallel. One end of the upper conveying belt is connected to the feeding mechanism through the feeding port 10, one end of the lower conveying belt is connected to the end of the upper conveying belt for discharging, and the other end falls into the discharging port 11. The residue collecting mechanism 2 is connected to the discharging port 11, and the feeding port 10 and the discharging port 11 are located in the same closed air drying box 3.

[0041] As an optional solution, the upper conveying belt and the lower conveying belt in the embodiment are both SS304 stainless steel spring mesh belts arranged in a double S type staggered engagement, which can realize automatic conveying and discharging of the materials. The mesh diameter of the spring mesh belt is 1mm-2mm, which facilitates low-temperature air drying of the formed materials on the belt by the low-temperature circulating hot air from the bottom of the box. The SS304 stainless steel material is suitable for strong acidic bacterial residue materials, and the S type arrangement has good plasticity and ductility during transmission. The use of stainless steel spring mesh belt and polyurethane ultra-thin mesh belt can be used for strong acidic bacterial residue air drying, and improve the service life of the equipment. The belt is a conveying mesh belt 4, which facilitates continuous feeding and air drying of the initial granular formed materials, and continuous discharging of the materials after air drying. The initial granular formed materials are laid flat above the mesh belt, and the thickness of the laid materials on the mesh belt is limited, which is beneficial to the penetration of the circulating hot air and the air drying of the materials on the mesh belt.

[0042] As an optional solution, a matching mesh belt 9 is arranged below the upper conveying belt in the embodiment. The matching mesh belt 9 is arranged obliquely towards the material dropping end of the upper conveying belt. The matching mesh belt 9 is a polyurethane ultra-thin mesh belt, and the thickness of the matching mesh belt 9 is 6mm-1.2mm, and the mesh diameter is 0.8mm-1.5mm. Figure 1 In the embodiment, the matching mesh belt 9 is inclined to the material dropping end (lower right) of the upper conveying belt by 25°-40°, preferably about 30°. The matching mesh belt 9 can be installed on the closed air drying box 3 by two supporting rods, so that the fine particles falling on the matching mesh belt 9 during the movement of the upper conveying belt can slide to the lower conveying belt under the blowing of the hot air and be taken away, which is beneficial to the cleaning and maintenance of the equipment, and improves the utilization rate and air drying efficiency of the equipment.

[0043] As an optional solution, the circulating air chamber 5 is in communication with the top plate and the bottom plate of the closed air drying box 3, and the communication areas are uniformly distributed with air holes. The top and bottom of the closed air drying box 3 are provided with temperature sensors 17. The bottom temperature of the closed air drying box 3 is 50℃-60℃, and is preferably 56℃. In the embodiment, the circulating hot air uses the inherent air source in the box. The air is heated by the compressor 14, and then the hot air is circulated and delivered in the box by the induced draft fan 8. The circulating hot air penetrates the mesh belt from bottom to top to dry the formed materials at low temperature. The moisture generated during the air drying process is condensed into condensed water by the condenser 13 and then discharged into the sewage treatment system, achieving the purpose of water removal and weight reduction.

[0044] As an optional solution, the air volume of the induced draft fan 8 in the embodiment is 5000m 3 / h-6000m 3 / h, preferably 5500m 3The air-drying time of the antibiotic bacterial residue from the feeding mechanism to the discharging mechanism 2 is 50-90 minutes, preferably 60 minutes, to ensure economic benefits.

[0045] As an alternative, the air conditioning refrigeration assembly in the embodiment comprises an evaporator 12, a compressor 14, a condenser 13 and a throttle valve 15 connected in sequence by pipelines, the evaporator 12 is located in the vertical section of the circulating air chamber 5, the condenser 13 is located in the horizontal section at the bottom of the circulating air chamber 5, and the air outlet of the air blower 8 passes through the evaporator 12 and the condenser 13 in sequence.

[0046] As an alternative, the bottom of the circulating air chamber 5 between the evaporator 12 and the condenser 13 is provided with an inclined surface 18 facing the evaporator 12, the bottom of the inclined surface 18 is provided with a condensate discharge pipe 16, and the moisture generated in the air-drying process is discharged into the sewage treatment system after being condensed into condensate by the condenser 13.

[0047] In the embodiment, the low-temperature circulating air-drying reduction method is used by the air conditioning system through the closed air-drying box 3, which can reduce the moisture content of the bacterial residue to 10-28% and the reduction rate is as high as 53%, solving the related problems caused by the use of incineration treatment; the air-drying process is completely closed, no waste gas is discharged, the reduction process does not change the chemical properties of the bacterial residue, no secondary pollution is generated, and it meets the strict environmental protection control requirements.

[0048] The method for reducing the amount of antibiotic bacterial residue provided by the embodiment adopts a low-temperature circulating hot air drying drying box as a closed box drying box, which is composed of a plurality of independent box-type split modules connected in series. Each module component is provided with an independent air blower 8, a compressor 14, an evaporator 12 and a condenser 13, and a conveying mesh belt 4 of a corresponding length is further provided. The compressor 14 and the air blower 8 are used to generate low-temperature circulating hot air to dry the formed material. The moisture generated during the drying process is condensed into condensed water by the condenser 13 and then discharged into the sewage treatment system. The number of the plurality of independent box-type split modules can be determined according to the drying time and the drying effect to determine the optimal number of modules. A conveying mesh belt 4 of a corresponding length is further provided to complete the low-temperature reduction and achieve the expected optimal economic effect. The split modules can be individually repaired in case of failure, without affecting the operation, which helps to ensure the reduction rate and further reduce the operation and maintenance costs. The low-temperature circulating hot air drying is fully closed during the drying process, which has high drying efficiency and low energy consumption. The moisture content of the dried bacterial residue is greatly reduced, and the reduction rate is as high as 53%. The drying process is fully closed and no waste gas is discharged. The low-temperature drying does not change the chemical properties of the material, and no secondary pollution is generated, which meets the strict environmental control requirements. The amount of dried bacterial residue is small, which is easy to package, store, transport and further dispose by standardized harmless incineration, which is beneficial to the protection of the ecological environment and human health. The direct cost of third-party incineration disposal of enterprises is reduced by as much as 50%, which greatly reduces the cost of enterprise waste bacterial residue treatment. The moisture content of the granular formed material after drying is low, and the calorific value is high, so no fuel or auxiliary material needs to be added during incineration. The granular formed material is also easy to dispose by standardized incineration in the later stage, which greatly reduces the incineration operation and energy consumption costs, and the economic benefits are very considerable.

[0049] The technical solutions in the present application will be described clearly and completely below in combination with the embodiments in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application. Embodiment 1

[0050] 1) The antibiotic bacterial residue with a moisture content of 55% is extruded and granulated by a granulator to obtain initial granular formed material, and the particle size of the initial granular formed material is 3.0 mm;

[0051] 2) The granular formed material is naturally discharged and laid on the slowly moving SS304 stainless steel conveying mesh belt in the closed box body, so that the laying thickness of the granular formed material is 12.0 mm~20.0 mm; the air in the box body is heated by the compressor and the hot air in the box body is circulated by the air blower to dry the formed material on the mesh belt. The moisture generated during the drying process is condensed into condensed water by the condenser and then discharged and collected to the sewage treatment system for centralized treatment. The circulating hot air temperature is 52℃, the air volume is 5000m 3 / h, the drying time of the formed material is 50 min, and the discharged and packaged material is measured and stored. Example 2

[0052] The same as Example 1, the same batch of antibiotic sludge is used, and the only difference in treatment is that the drying time of the formed material is 80 min. Example 3

[0053] The same as Example 1, the same batch of antibiotic sludge is used, and the only difference in treatment is that the drying time of the formed material is 160 min. Example 4

[0054] The same as Example 1, the same batch of antibiotic sludge is used, and the only difference in treatment is that the drying time of the formed material is 240 min.

[0055] Comparative Example 1

[0056] The same as Example 1, the same batch of antibiotic sludge is used, and the only difference in treatment is that the antibiotic sludge laid on the SS304 stainless steel conveying mesh belt is not subjected to drying treatment.

[0057] Test Example 1

[0058] After the treatment of Examples 1-4 and Comparative Example 1, the moisture content of the sludge, the amount of sludge (constant weight), the reduction rate and the treatment cost are measured, and the results are shown in Table 1.

[0059] Table 1: Detection results of relevant indicators of antibiotic sludge after treatment in Examples 1-4 and Comparative Example 1

[0060] Treatment method Air-drying time (min) Moisture content (%) Moisture content reduction percentage (%) Amount of mushroom residue (tons) Reduction rate (%) Air-drying cost (yuan) Incineration cost (yuan) Total cost (yuan) Comparative Example 1 0 55 0 1 0 0 2000 2000 Example 1 50 21 62 0.57 43 133 1140 1273 Example 2 80 17 69 0.54 46 213 1080 1293 Example 3 160 7.5 86 0.49 51 427 980 1407 Example 4 240 5.9 89 0.48 52 640 960 1600

[0061] Note: The drying cost is calculated at 160 yuan / 60 min, and the incineration cost is calculated at 2000 yuan / ton.

[0062] As can be seen from Table 1, the antibiotic sludge with a moisture content of 55% is subjected to Example 1 treatment, and the moisture content is 21%, reduced by 62%, and the reduction rate is 43%; after Example 2 treatment, the moisture content is 17%, reduced by 69%, and the reduction rate is 46%; after Example 3 treatment, the moisture content is 7.5%, reduced by 86%, and the reduction rate is 51%; after Example 4 treatment, the moisture content is 5.9%, reduced by 89%, and the reduction rate is 52%. Under the condition that the initial formed material, hot air temperature and air volume are consistent, the longer the drying time, the lower the moisture content after drying, but after drying to a certain extent, its drying cost rises rapidly, while the cost for direct incineration decreases slowly. Considering the drying cost and incineration cost, a balance point is found between them, so as not to cause energy waste due to excessive drying, and to greatly reduce the amount of sludge while achieving the best economic benefit. Example 5

[0063] 1) The wet sludge with a moisture content of 49% is extruded and granulated by a granulator to form initial granular formed material, and the granular formed material has a particle size of 3.0 mm;

[0064] 2) The granular formed material is naturally discharged and laid on the slowly moving SS304 stainless steel conveying mesh belt in the closed box, so that the laying thickness of the granular formed material is 12.0 mm~20.0 mm; the formed material on the mesh belt is dried by the hot air in the box circulated by the compressor and the induced draft fan, the moisture generated in the drying process is condensed into condensed water by the condenser and then discharged and collected to the sewage treatment system for centralized treatment, the circulating hot air temperature is 58℃, the air volume is 5500m 3 / h, the formed material drying residence time is 120 min, and the discharged and packaged material is metered and stored. After drying, the moisture content of the sludge is 10%, and the weight loss rate is 45%. Example 6

[0065] 1) The wet sludge with a moisture content of 58% is pushed to the granulator by the hydraulic double screw conveyor for extrusion and granulation to form initial granular formed material, and the initial granular formed material has a particle size of 3.0 mm;

[0066] 2) The granular formed material is naturally discharged and laid on the slowly moving SS304 stainless steel conveying mesh belt in the closed box, so that the laying thickness of the granular formed material is 12.0 mm~20.0 mm; the formed material on the mesh belt is dried by the hot air in the box circulated by the compressor and the induced draft fan, the moisture generated in the drying process is condensed into condensed water by the condenser and then discharged and collected to the sewage treatment system for centralized treatment, the circulating hot air temperature is 58℃, the air volume is 5500m 3 / h, the formed material drying residence time is 60 min, and the discharged and packaged material is metered and stored. After drying, the moisture content of the sludge is 15%, and the weight loss rate is 51%. Example 7

[0067] 1) The wet sludge with a moisture content of 60% is extruded and granulated by a granulator to form initial granular formed material, and the initial granular formed material has a particle size of 5.0 mm;

[0068] 2) The granular formed material is naturally discharged and laid on the slowly moving SS304 stainless steel conveying mesh belt in the closed box, so that the laying thickness of the granular formed material is 12.0 mm~20.0 mm; the formed material on the mesh belt is dried by the hot air in the box circulated by the compressor and the induced draft fan, the moisture generated in the drying process is condensed into condensed water by the condenser and then discharged and collected to the sewage treatment system for centralized treatment, the circulating hot air temperature is 52℃, the air volume is 5000m 3 / h, the residence time of the formed material in air drying is 50 min, the discharged material is packaged, measured and stored, the moisture content of the fungus residue after air drying is 28%, and the weight reduction rate is 44%. Example 8

[0069] 1) The wet fungus residue with a moisture content of 60% is extruded and granulated into initial granular formed material by a granulator, and the granulation particle size of the initial granular formed material is 3.0 mm;

[0070] 2) The granular formed material is naturally discharged and laid on the slowly moving SS304 stainless steel conveying mesh belt in a closed box, so that the laying thickness of the granular formed material is 12.0 mm to 20.0 mm; a matched mesh belt is laid side by side below the SS304 stainless steel mesh belt, the matched mesh belt is a polyurethane ultra-thin mesh belt with a thickness of 1.0 mm and a pore size of 1.0 mm, which is used to collect the small fungus residue particles scattered in the running and moving process of the upper mesh belt, so as to facilitate the cleaning and maintenance of the equipment, improve the utilization rate and air drying efficiency of the equipment; the formed material on the mesh belt is air dried by compressing the air in the box and circulating the hot air in the box by the induced draft fan, the moisture generated in the air drying process is condensed into condensed water by a condenser and then discharged and collected to a sewage treatment system for centralized treatment, the circulating hot air temperature is 54℃, the air volume is 6000m 3 / h, the residence time of the formed material in air drying is 90 min, the discharged material is packaged, measured and stored, the moisture content of the fungus residue after air drying is 15%, and the weight reduction rate is 53%.

[0071] As can be seen from the above, the method provided by the application has high antibiotic fungus residue weight reduction efficiency, and can dry the antibiotic fungus residue to a moisture content of 10% to 28%.

[0072] The above only describes the preferred embodiments of the application, and it should be noted that those skilled in the art can make some improvements and refinements without departing from the principles of the application, and these improvements and refinements should also be considered as the protection scope of the application.​

Claims

1. A weight reduction device for reducing the amount of antibiotic bacterial residue, characterized in that, The waste reduction equipment includes a sealed air-drying box, a conveyor belt, a circulating air chamber, and an air conditioning refrigeration component. The sealed air-drying box has a sealed circulating air chamber on its outside. The circulating air chamber is sequentially equipped with an induced draft fan and the evaporator and condenser of the air conditioning refrigeration component. The sealed air-drying box is equipped with an air outlet and an air inlet. The air outlet of the sealed air-drying box is connected to the induced draft fan, and the air inlet of the sealed air-drying box is connected to the air outlet of the circulating air chamber. The conveyor belt is installed inside the sealed air-drying box and is used to carry antibiotic bacterial residue. The conveyor belt includes an upper conveyor belt and a lower conveyor belt arranged in parallel. One end of the upper conveyor belt receives the material from the feeding mechanism through the inlet, and one end of the lower conveyor belt receives the material from the end of the upper conveyor belt. The antibiotic residue falls from the other end of the lower conveyor belt into the outlet. The residue collection mechanism receives the material from the outlet, and the inlet and outlet are located in the same sealed drying box. Both the upper conveyor belt and the lower conveyor belt are double-layered S-shaped interlocking stainless steel spring mesh belts, and the mesh diameter on the stainless steel spring mesh belt is 1mm~2mm. A matching mesh belt is provided below the upper conveyor belt. The matching mesh belt is inclined towards the material drop end of the upper conveyor belt, and the mesh diameter of the matching mesh belt is 0.8mm~1.5mm. The bottom of the circulating air chamber between the evaporator and the condenser is provided with an inclined surface facing the evaporator, and a condensate drain pipe is provided at the bottom of the inclined surface.

2. A method for reducing the amount of antibiotic bacterial residue, using the reduction equipment for reducing the amount of antibiotic bacterial residue as described in claim 1, characterized in that, Includes the following steps: The granular antibiotic bacterial residue was dried to a moisture content of 10%–28% using hot air drying; the hot air drying temperature was 52℃–58℃; the hot air drying time was 50–120 minutes; and the hot air volume was 5000 m³ / min. 3 / h~6000m 3 / h.

3. The method according to claim 2, characterized in that, The temperature for hot air drying is 54℃~56℃.

4. The method according to claim 2, characterized in that, The initial moisture content of the antibiotic bacterial residue is 40%~65%.

5. The method according to claim 2, characterized in that, The antibiotic residue was dried to a moisture content of 15% to 21%.

6. The method according to claim 2, characterized in that, The diameter of the antibiotic residue is 3.0 mm to 5.0 mm.

7. The method according to claim 2, characterized in that, The thickness of the antibiotic bacterial residue is 12.0 mm to 20.0 mm.

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