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CN-121974737-A - System and method for recycling production of organic fertilizer by solid waste three-section horizontal rotary fermentation

CN121974737ACN 121974737 ACN121974737 ACN 121974737ACN-121974737-A

Abstract

The invention provides a system and a method for producing organic fertilizer by solid waste three-section horizontal rotary fermentation resource, belonging to the technical field of agricultural waste resource treatment. Solves the problems that when the environmental temperature of the traditional single tank is lower than-20 ℃, the temperature of materials is slowly raised, the microbial activity is low, and the system is seriously dependent on high-energy consumption electric auxiliary heat to maintain operation, so that the operation cost is increased. The device comprises a preheating starting tank, a drying odor-suppressing tank, a decomposing odor-suppressing tank and a heat recovery unit, wherein the preheating starting tank, the drying odor-suppressing tank and the decomposing odor-suppressing tank are sequentially connected along a material conveying direction, the heat recovery unit comprises a first heat exchanger, a second heat exchanger and a heat pump unit, the first heat exchanger is arranged between an air outlet of the preheating starting tank and an air inlet passage of the drying odor-suppressing tank, the second heat exchanger is arranged on an air outlet passage of the drying odor-suppressing tank, and an evaporator inlet of the heat pump unit is connected with an air outlet junction of the second heat exchanger and an air outlet junction of the decomposing odor-suppressing tank. It is mainly used for treating agricultural waste.

Inventors

  • ZHANG JUNZHENG
  • HE WEI
  • LIU JINGWEI
  • LIU ZHONGSHAN
  • LIU LIJIA
  • ZHANG JISHENG
  • YU YANLING
  • SHI QING

Assignees

  • 哈尔滨华美亿丰成套设备制造有限公司

Dates

Publication Date
20260505
Application Date
20260205

Claims (10)

  1. 1. The system for producing the organic fertilizer by solid waste three-section horizontal rotary fermentation is characterized by comprising a preheating starting tank (1), a drying and odor suppressing tank (2), a rotten odor suppressing tank (3) and a heat recovery unit, wherein the preheating starting tank (1), the drying and odor suppressing tank (2) and the rotten odor suppressing tank (3) are sequentially connected along the material conveying direction, the heat recovery unit comprises a first heat exchanger (4), a second heat exchanger (5) and a heat pump unit (8), the first heat exchanger (4) is arranged between an air outlet of the preheating starting tank (1) and an air inlet passage of the drying and odor suppressing tank (2), the second heat exchanger (5) is arranged on the air outlet passage of the drying and odor suppressing tank (2), an evaporator inlet of the heat pump unit (8) is connected with an air outlet of the second heat exchanger (5) and an air outlet of the rotten odor suppressing tank (3) in a crossing mode, and a condenser outlet of the heat pump unit (8) is respectively connected with the air inlets of the preheating starting tank (1) and the rotten odor suppressing tank (3).
  2. 2. The system for producing organic fertilizer by solid waste three-stage horizontal rotary fermentation recycling according to claim 1 is characterized in that an exhaust gas outlet of the first heat exchanger (4) is connected with an oxygen supply gas mixing tank, an air outlet of the first heat exchanger is connected with the second heat exchanger (5), an air outlet of the second heat exchanger (5) is connected with an oxygen supply gas mixing tank (6), and an outlet of the oxygen supply gas mixing tank (6) is connected with an air inlet of the drying odor suppression tank (2).
  3. 3. The system for producing the organic fertilizer by solid waste three-section horizontal rotary fermentation recycling according to claim 2 is characterized in that the outlet of the second heat exchanger (5) and the air outlet of the decomposed deodorizing tank (3) are connected with a waste heat steam mixing tank (7), and the outlet of the waste heat steam mixing tank (7) is connected with the inlet of an evaporator of a heat pump unit (8).
  4. 4. The system for producing the organic fertilizer by recycling the solid waste three-section horizontal rotary fermentation is characterized in that each passage connected with the heat recovery unit is provided with an electric control valve, wherein the preheating starting tank (1), the drying odor suppressing tank (2) and the decomposing odor eliminating tank (3).
  5. 5. The system for producing the organic fertilizer by solid waste three-stage horizontal rotary fermentation recycling according to claim 4 is characterized in that fans are arranged at the inlet/outlet of the preheating starting tank (1), the drying and odor-inhibiting tank (2), the decomposing and odor-eliminating tank (3), the first heat exchanger (4), the second heat exchanger (5) and the heat pump unit (8).
  6. 6. The system for producing organic fertilizer by solid waste three-section horizontal rotary fermentation recycling of claim 5, wherein the tail end of the waste gas pipeline of the second heat exchanger (5) is provided with a first exhaust valve (91), and the waste gas pipeline of the decomposing deodorizing tank (3) is provided with a second exhaust valve (92).
  7. 7. The system for producing the organic fertilizer by recycling the solid waste three-section horizontal rotary fermentation is characterized in that the preheating starting tank (1), the drying odor suppression tank (2), the decomposing odor suppression tank (3), the heat recovery unit, the fan, the electric control valve, the first exhaust valve (91) and the second exhaust valve (92) are all in signal connection with the intelligent control system.
  8. 8. A method for producing organic fertilizer by adopting the system for producing organic fertilizer by solid waste three-section horizontal rotary fermentation recycling as claimed in any one of claims 1-7, which is characterized by comprising the following steps: Step 1, conveying the pretreated agricultural waste gas to a preheating starting tank (1), preheating air and materials in the tank by using 65-85 ℃ hot air provided by a heat pump unit (8), and inoculating a composite microbial inoculum to ensure that the core temperature of the materials is increased to more than 40 ℃ within 18 hours; Step 2, conveying the material to a drying and odor inhibiting tank (2), and carrying out high-temperature aerobic fermentation under the conditions of 55-65 ℃ and 5% -15% of oxygen concentration to realize deep drying of the material and inhibit odor generation in situ; Step 3, conveying the treated material to a decomposing and deodorizing tank (3), decomposing and stabilizing in a micro-oxygen environment at 40-45 ℃, and degrading residual odor by utilizing a functional microbial agent; And 4, aging the decomposed material to obtain an organic fertilizer product.
  9. 9. The method for producing the organic fertilizer by recycling the solid waste three-section horizontal rotary fermentation system, which is disclosed in claim 8, is characterized in that in the step 1, the composite microbial inoculum is 0.3% of the total mass of materials, and the composite microbial inoculum is bacillus stearothermophilus.
  10. 10. The method for producing the organic fertilizer by recycling the solid waste three-section horizontal rotary fermentation system, which is disclosed in claim 8, is characterized in that the treated material in the step 3 can be directly subjected to open air aging.

Description

System and method for recycling production of organic fertilizer by solid waste three-section horizontal rotary fermentation Technical Field The invention belongs to the technical field of agricultural waste recycling treatment, and particularly relates to a system and a method for producing organic fertilizer by solid waste three-stage horizontal rotary fermentation recycling. Background The recycling utilization of agricultural wastes in cold areas faces serious challenges, especially in low-temperature environments, the treatment efficiency and the environmental protection requirement of organic solid wastes such as livestock and poultry manure are difficult to be compatible, the traditional single-tank fermentation system is difficult to start at low temperature, energy consumption is increased rapidly, odor control is invalid and the like due to the fact that the functional integration level is too high, when the environment temperature is lower than-20 ℃, materials are slowly heated, heat loss is serious, microbial activity cannot reach an ideal threshold value for a long time, the system is forced to run by relying on high-energy consumption auxiliary heat, meanwhile, the parameter conflict of drying, decomposition and deodorization processes in the single tank is increasingly prominent, the beneficial microbial community is destroyed and nitrogen volatilization is aggravated while the high-temperature drying can accelerate dehydration, the fertilizer efficiency can be maintained while the temperature is reduced, the treatment period is prolonged and odor is accumulated due to the fact that the existing terminal deodorization technology is poor in low-temperature adaptability, the investment cost is increased, and the large-scale production of organic fertilizers is further restricted. The prior art fails to follow the staged rules of microorganism metabolism and material conversion, attempts to realize desiccation, decomposition and deodorization synchronously in a single reactor, and inevitably leads to frequent oscillation of process parameters, so that the system falls into a vicious circle of oxygen deficiency, oxygen enrichment, energy consumption and nitrogen retention, and odor excess when the temperature is controlled, although the prior art attempts to improve the system by series connection of a plurality of tanks or auxiliary improvement of a heat pump, the system is remained on the physical superposition level of equipment, and the system design of functional partition and energy gradient is lacked, so that the directional regulation and control requirements of microorganism communities in the special environment of a cold region are not fully considered. Disclosure of Invention In view of the above, the invention aims to provide a system and a method for producing organic fertilizer by solid waste three-stage horizontal rotary fermentation, which are used for solving the problems of slow material temperature rise, low microbial activity, serious dependence on high-energy consumption electric auxiliary heat for maintaining operation of the system and increased operation cost caused by the fact that the environment temperature of a traditional single tank is lower than-20 ℃. In order to achieve the above purpose, the present invention adopts the following technical scheme: The utility model provides a system for solid waste syllogic spiral fermentation resource production fertilizer, includes preheating starting tank, mummification and presses down the stink jar, rotten stink jar and heat recovery unit, preheating starting tank, mummification press down the stink jar and rotten stink jar is connected gradually along material conveying direction, the heat recovery unit includes first heat exchanger, second heat exchanger and heat pump unit, first heat exchanger sets up between the air outlet of preheating starting tank and the air intake passageway of mummification presses down the stink jar, the second heat exchanger sets up on the air outlet passageway of mummification presses down the stink jar, the evaporimeter entry and the second heat exchanger air outlet of heat pump unit and rotten stink jar air outlet junction of heat pump unit are connected, the condenser export of heat pump unit is connected with the air intake of preheating starting tank and rotten stink jar respectively. Further, the waste gas outlet of the first heat exchanger is connected with the oxygen supply gas mixing tank, the air outlet is connected with the second heat exchanger, the air outlet of the second heat exchanger is connected with the oxygen supply gas mixing tank, and the outlet of the oxygen supply gas mixing tank is connected with the air inlet of the drying odor-inhibiting tank. Further, the outlet of the second heat exchanger and the air outlet of the decomposed deodorizing tank are connected with a waste heat steam mixing tank, and the outlet of the waste heat steam mixing tank is connected with the in