Resource regeneration system and method for full-quantitative treatment of livestock and poultry manure through subcritical water pyrolysis

Abstract

The invention discloses a resource regeneration system and method for full-quantitative treatment of livestock and poultry manure through subcritical water pyrolysis, and the regeneration system comprises a metering buffer device which is used for receiving a manure raw material and a straw auxiliary material and preparing a mixture; the subcritical water pyrolysis reaction kettle is used for receiving the mixture and carrying out a subcritical water pyrolysis process reaction procedure on the mixture; the solid-liquid separation equipment is used for carrying out solid-liquid separation on the water pyrolysis material discharged from the kettle; the aerobic fermentation area is used for stacking solid materials subjected to solid-liquid separation; the high-temperature anaerobic fermentation treatment device is used for receiving the liquid material subjected to solid-liquid separation and producing biogas; and the biogas purification and storage device is used for receiving and storing the produced biogas and providing gas energy for the steam generator. According to the present invention, the manure organic waste can be strongly decomposed, such that the rapid and efficient disinfection treatment on the harmful substances and the odor can be achieved, the rapid degradation and the small molecularization on the organic nutrient substances in the manure can be achieved, and the manure organic waste can be used as the fertilizer and the feed resource.

Description

Technical Field

[0001] The present invention relates to the technical field of resource recycling, and in particular to a system and method for recycling livestock and poultry manure resources by fully quantifying subcritical water pyrolysis. Background Art

[0002] The existing manure treatment and disposal technology is still at the stage where traditional fermentation and incineration are the mainstream methods. With the development of society, its disadvantages have become increasingly obvious. For example, manure fermentation and composting takes a long time, occupies a large area, has widespread excessive emissions, has high overall costs, and has average product quality. In addition, fermentation is significantly affected by climate temperature restrictions. This technology cannot meet the needs of recycling manure resources day and night. Therefore, the call to effectively solve manure pollution has never stopped.

[0003] Livestock and poultry manure has the obvious duality of "resource" and "pollution". The current reality is that the "pollution" of livestock and poultry manure is far greater than the "resource" utilization. It is difficult to meet the demand for large amounts of water and fertilizer in agriculture, and only a large amount of fertilizer and water resources can be used. It is the trend of the times to use industrialized processes and equipment to quickly, efficiently and simply treat manure and realize resource utilization. Manure water is the most troublesome material for existing manure treatment processes and equipment, but there is no fast, efficient and simple process and equipment to treat and utilize resources. It is either treated in a high-energy and high-cost manner, or used or discharged inefficiently. Therefore, manure water is the cause of the most common and serious pollution phenomenon at present, and it is also the biggest environmental burden for breeders. Summary of the invention

[0004] The purpose of the present invention is to provide a system and method for fully quantifying livestock and poultry manure resource regeneration by subcritical water pyrolysis to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] Subcritical water pyrolysis fully quantitative treatment of livestock and poultry manure resource regeneration system, including:

[0007] Metering and buffering equipment, used to receive manure raw materials and straw auxiliary materials, to measure and control the raw materials and / or auxiliary materials with dual functions of volume and weight, and to prepare mixed materials;

[0008] A subcritical water pyrolysis reactor is used to receive the mixed material and perform a subcritical water pyrolysis process reaction procedure on the mixed material;

[0009] Solid-liquid separation equipment, used for solid-liquid separation of the hydrothermal decomposition material leaving the kettle;

[0010] The aerobic fermentation area is used to pile up the solid materials after solid-liquid separation, further evaporate the water, and use them as biofertilizer, feed or pesticide carrier;

[0011] High temperature anaerobic fermentation treatment device, used to receive liquid materials after solid-liquid separation and produce biogas;

[0012] The biogas purification and storage device is used to receive and store the produced biogas, provide gas energy to the steam generator, and the steam generator generates water vapor, and inputs high-temperature and high-pressure water vapor into the subcritical water pyrolysis reactor through the steam storage tank.

[0013] As a further solution of the present invention, it also includes a slag-liquid separation device for separating slag-liquid from the sludge water of high-temperature anaerobic fermentation, the separated sludge is used as biofertilizer, and the separated sludge is used for farmland irrigation, facility agriculture and / or reclaimed water reuse.

[0014] As a further solution of the present invention, it also includes a biological deodorization device and a raw material pool for caching feces and sewage raw materials. The biological deodorization device is connected to the raw material pool and the pressure relief pool through a negative pressure pipe, respectively, and is used to suck the waste gas discharged from the raw material pool and the pressure relief pool, and deodorize the exhaust gas. The pressure relief pool is connected to the pressure relief port of the subcritical water pyrolysis reactor through a pipe.

[0015] As a further scheme of the present invention, the high-temperature anaerobic fermentation treatment device includes an anaerobic fermentation tank, a liquid inlet pipe for receiving liquid materials is connected to the bottom of the anaerobic fermentation tank, a water distributor is installed at the lower end of the anaerobic fermentation tank corresponding to the liquid inlet end, a three-phase separator is installed at the upper end of the anaerobic fermentation tank, an anaerobic sludge bed is filled between the three-phase separator and the water distributor, a liquid biogas discharge pipe for draining liquid biogas water is connected to the outer wall of the upper end of the anaerobic fermentation tank, and a biogas discharge pipe for draining biogas is connected to the top of the anaerobic fermentation tank.

[0016] The method for regenerating livestock and poultry manure resources by fully quantified treatment of subcritical water pyrolysis is based on the aforementioned system for regenerating livestock and poultry manure resources by fully quantified treatment of subcritical water pyrolysis, and comprises the following steps:

[0017] S1, using fresh manure as raw material and crushed straw as auxiliary material, adding the raw material and auxiliary material into a subcritical water pyrolysis reactor according to the ratio;

[0018] S2, inputting high-temperature and high-pressure steam into the subcritical water pyrolysis reactor through the steam storage tank, and sequentially performing pressure-increasing, pressure-maintaining and pressure-relieving treatments on the subcritical water pyrolysis reactor to complete the subcritical water pyrolysis process reaction procedure, and achieve the requirements of harmless and low-molecular manure; wherein the steam in the steam storage tank is provided and supplemented by the steam generator;

[0019] S3, extracting the hydrothermolysis material from the subcritical hydrothermolysis reactor, and performing solid-liquid separation on the hydrothermolysis material exiting the reactor;

[0020] S4. The separated solid materials are piled in the aerobic fermentation area to further evaporate the water to meet the water content requirements of various resource products; the separated liquid materials are introduced into the high-temperature anaerobic fermentation treatment device;

[0021] S5. The biogas produced by high-temperature anaerobic fermentation is introduced into the biogas purification and storage device to provide gas energy to the steam generator; the biogas slurry water produced by high-temperature anaerobic fermentation is separated into slag and liquid, the separated biogas slag is used as bio-fertilizer, and the separated biogas slurry is used for farmland irrigation, facility agriculture and / or reclaimed water reuse.

[0022] As a further solution of the present invention, the specific process of step S1 is:

[0023] First, the raw materials are conveyed to the metering and buffering equipment by a screw pump or a scraper, and then, according to the proportion, the auxiliary materials are conveyed to the metering and buffering equipment by pneumatic or belt conveyors to form a mixture for standby use, wherein the metering and buffering equipment measures and controls the raw materials and / or auxiliary materials by means of both volume and weight, and the final volume of the mixture measured and buffered each time is less than 70% of the inner volume of the subcritical water pyrolysis reactor;

[0024] Next, a screw pump or a scraper is used to transport the prepared mixture to a subcritical water pyrolysis reactor.

[0025] As a further solution of the present invention, in step S1, when the water content of the raw material or the mixture is greater than 78%, a screw pump is used to suck and transport the raw material; when the water content of the raw material or the mixture is 78% or less, a scraper conveyor is used to transport the raw material.

[0026] As a further solution of the present invention, during the metering and buffering process of step S1, 2-10% of auxiliary materials are added based on the solid weight of the manure raw material, and the particle size of the auxiliary materials is less than or equal to 5 mm.

[0027] As a further solution of the present invention, in step S2, the water vapor pressure inside the steam storage tank is set to 2.0 MPa, the temperature is set to 180°C, and the water vapor pressure inside the steam generator is set to 2.5 MPa, the temperature is set to 210°C.

[0028] As a further scheme of the present invention, in step S2, the pressure-raising, pressure-maintaining and pressure-releasing treatment processes of the subcritical water pyrolysis reactor are specifically as follows: first, the pressure is raised to 1.6 MPa, the temperature reaches 150°C, and the pressure-raising process lasts for 18-22 minutes; then, the pressure is maintained for 9-11 minutes, and finally, the pressure is released to 0 MPa, the temperature is greater than 100°C, and the pressure-releasing process lasts for 9-11 minutes. During the feeding, pressure-raising and pressure-maintaining processes, the stirring blades of the subcritical water pyrolysis reactor are all turned in the forward direction, and the speed is 15-20 rpm; in the pressure-releasing link, stirring is stopped; after the pressure-releasing is completed, the material is discharged, at this time, the stirring blade turns in the reverse direction, the speed is 20 rpm, and the discharge time is 10 minutes.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention makes full use of the large ion capacity of subcritical water, and has a strong decomposition ability for manure and organic waste. While achieving rapid and efficient disinfection and treatment of harmful substances and odors such as manure, viruses and bacteria, it also has the function of rapidly degrading and reducing the valuable organic nutrients in manure to small molecules; the organic matter and nutrients in the manure after the reaction treatment can be rapidly and efficiently absorbed and differentiated by plant roots, animal intestines and stomachs, and microorganisms in the soil, and can be used as fertilizer and feed resources; the appropriate pressure and temperature of subcritical water is used to render manure and waste harmless and regenerate resources, which will not produce excessive treatment of carbonization of organic matter in manure and waste, and can meet the resource recycling requirements of manure and waste, which can be said to be economical and just right. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the subcritical water pyrolysis full-scale treatment of livestock and poultry manure resource regeneration system;

[0031] Figure 2 This is a schematic diagram of the process of fully quantifying the treatment of livestock and poultry manure resources by subcritical water pyrolysis;

[0032] Figure 3 It is a schematic diagram of a high-temperature anaerobic fermentation treatment device in a subcritical water pyrolysis full-scale treatment system for livestock and poultry manure resource regeneration;

[0033] Figure 4 This is a schematic diagram of the solid-liquid separation equipment in the subcritical water pyrolysis full-scale treatment of livestock and poultry manure resource regeneration system.

[0034] In the figure: 1. Raw material pool; 2. Metering buffer equipment; 3. Subcritical water pyrolysis reactor; 4. Steam storage tank; 5. Steam generator; 6. Solid-liquid separation equipment; 61. Buffer tank; 62. Solid-liquid separator; 7. Aerobic fermentation area; 8. High-temperature anaerobic fermentation treatment device; 81. Anaerobic fermentation tank; 82. Liquid inlet pipe; 83. Biogas discharge pipe; 84. Biogas discharge pipe; 85. Anaerobic sludge bed; 86. Water distributor; 87. Three-phase separator; 9. Slag-liquid separation equipment; 10. Biogas purification storage device; 11. Pressure relief tank; 12. Biological deodorization device. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 4 The subcritical water pyrolysis fully quantitative treatment livestock and poultry manure resource regeneration system includes a metering and buffering device 2, a subcritical water pyrolysis reactor 3, a solid-liquid separation device 6, an aerobic fermentation area 7, a high-temperature anaerobic fermentation treatment device 8 and a biogas purification and storage device 10. The metering and buffering device 2 is used to receive manure raw materials and straw auxiliary materials, and to meter and control the raw materials and / or auxiliary materials with dual functions of volume and weight to prepare a mixture; the subcritical water pyrolysis reactor 3 is used to receive the mixture and perform a subcritical water pyrolysis process reaction procedure on the mixture; the solid-liquid separation device 6 is used to perform solid-liquid separation on the water pyrolysis material discharged from the reactor; the aerobic fermentation area 7 is used to stack the solid materials after solid-liquid separation, further evaporate the water, and use it as a biofertilizer, feed or pesticide carrier; the high-temperature anaerobic fermentation treatment device 8 is used to receive the liquid materials after solid-liquid separation to produce biogas; the biogas purification and storage device 10 is used to receive and store the produced biogas, provide gas energy to the steam generator 5, the steam generator 5 generates water vapor, and inputs high-temperature and high-pressure water vapor into the subcritical water pyrolysis reactor 3 through the steam storage tank 4.

[0037] As a further solution, the present invention also includes a slag-liquid separation device 9, which is used to separate slag from liquid in the high-temperature anaerobic fermentation sludge water. The separated sludge is used as biofertilizer, and the separated sludge is used for farmland irrigation, facility agriculture and / or reclaimed water reuse.

[0038] As a further solution, the present invention also includes a biological deodorization device 12 and a raw material pool 1 for caching feces raw materials. The biological deodorization device 12 is connected to the raw material pool 1 and the pressure relief pool 11 through a negative pressure pipe, respectively, and is used to suck the waste gas discharged from the raw material pool 1 and the pressure relief pool 11, and deodorize the exhaust gas. The pressure relief pool 11 is connected to the pressure relief port of the subcritical water pyrolysis reactor 3 through a pipe.

[0039] The manure and sewage materials to be processed are concentrated in a semi-underground steel-concrete structure raw material pool 1 for buffering. The pool capacity of the raw material pool 1 can meet the processing needs for more than one day. The capacity of a single pool is 200m 3 The need for a larger number of caches can be met by increasing the number of pools. The raw material pool 1 can be specifically a negative pressure chamber equipped with an anti-corrosion stacking door seal. The negative pressure air inside the negative pressure chamber is sent into the deodorizing biological curtain tunnel greater than 6 meters in the biological deodorizing device 12 through a pipe, and discharged from a chimney higher than 12 meters (or higher than the height of surrounding buildings) at the tail end of the deodorizing biological curtain tunnel. The biological deodorizing device 12 also deodorizes and discharges the slowly released waste gas in the negative pressure relief pool 11 at the same time. The noise released by the subcritical water pyrolysis reactor 3 is absorbed by the pool water in the pressure relief pool 11, and the waste gas is absorbed by the pool water in the pressure relief pool 11 and released slowly.

[0040] As a further specific scheme, the high-temperature anaerobic fermentation treatment device 8 includes an anaerobic fermentation tank 81, the bottom of the anaerobic fermentation tank 81 is connected to a liquid inlet pipe 82 for receiving liquid materials, the lower end of the inside of the anaerobic fermentation tank 81 is installed with a water distributor 86 corresponding to the liquid inlet end, the upper end of the inside of the anaerobic fermentation tank 81 is installed with a three-phase separator 87, and an anaerobic sludge bed 85 is filled between the three-phase separator 87 and the water distributor 86, the upper end outer wall of the anaerobic fermentation tank 81 is connected to a biogas discharge pipe 83 for draining biogas water, and the top of the anaerobic fermentation tank 81 is connected to a biogas discharge pipe 84 for draining biogas.

[0041] See also Figure 2 The method for regenerating livestock and poultry manure resources by subcritical water pyrolysis is based on the above-mentioned system for regenerating livestock and poultry manure resources by subcritical water pyrolysis, and includes the following steps:

[0042] S1, using fresh manure as raw material and crushed straw as auxiliary material, adding the raw material and auxiliary material into a subcritical water pyrolysis reactor 3 according to the ratio;

[0043] S2, inputting high-temperature and high-pressure water vapor into the subcritical water pyrolysis reactor 3 through the steam storage tank 4, and sequentially performing pressure-increasing, pressure-maintaining and pressure-relieving treatments on the subcritical water pyrolysis reactor 3 to complete the subcritical water pyrolysis process reaction procedure, and achieve the requirements of harmless and low-molecular manure; wherein the water vapor of the steam storage tank 4 is provided and supplemented by the steam generator 5;

[0044] S3, extracting the hydrothermolysis material from the subcritical water pyrolysis reactor 3, and performing solid-liquid separation on the hydrothermolysis material exiting the reactor;

[0045] S4, the separated solid materials are piled up in the aerobic fermentation area 7 to further evaporate the water to meet the water content requirements of various resource products; the separated liquid materials are introduced into the high temperature anaerobic fermentation treatment device 8;

[0046] S5. The biogas produced by high-temperature anaerobic fermentation is introduced into the biogas purification and storage device 10 to provide gas energy to the steam generator 5; the biogas slurry water produced by high-temperature anaerobic fermentation is separated into slag and liquid, the separated biogas slag is used as biofertilizer, and the separated biogas slurry is used for farmland irrigation, facility agriculture and / or reclaimed water reuse.

[0047] As a further solution, the specific process of step S1 is:

[0048] First, the raw materials are conveyed to the metering buffer device 2 by a screw pump or a scraper, and then, according to the proportion, the auxiliary materials are conveyed to the metering buffer device 2 by pneumatic or belt conveyor to form a mixture for standby use, wherein the metering buffer device 2 measures and controls the raw materials and / or auxiliary materials by the dual functions of volume and weight, and the final volume of the mixture measured and cached each time is less than 70% of the inner volume of the subcritical water pyrolysis reactor 3;

[0049] Next, a screw pump or a scraper is used to transport the prepared mixed material to the subcritical water pyrolysis reactor 3 .

[0050] Specifically, the preparation time width of the raw materials and auxiliary materials in the metering and buffering device 2 is within 45 minutes; the bottom of the metering and buffering device 2 is a shaftless screw pushing mechanism with a certain width and from high to low (with a certain inclination). After the feed valve of the subcritical water pyrolysis reactor 3 is opened, the shaftless screw pushing mechanism of the metering and buffering device 2 is started, and all the mixed materials in the metering and buffering device 2 are sent into the subcritical water pyrolysis reactor 3 through a scraper or a screw pump. The feeding process is completed in about 10 minutes.

[0051] As a further solution, in step S1, when the water content of the raw material or the mixture is greater than 78%, a screw pump is used to suck and transport the raw material; when the water content of the raw material or the mixture is 78% or less, a scraper conveyor is used to transport the raw material.

[0052] As a further solution, during the metering and buffering process of step S1, 2-10% of auxiliary materials are added based on the solid weight of the manure raw material, and the particle size of the auxiliary materials is less than or equal to 5 mm.

[0053] As a further solution, in step S2, the water vapor pressure inside the steam storage tank 4 is set to 2.0 MPa, the temperature is set to 180° C., and the water vapor pressure inside the steam generator 5 is set to 2.5 MPa, the temperature is set to 210° C. The steam generator 5 may have the functions of automatic soft water treatment, water replenishment, water consumption, and automatic recording of water vapor consumption per unit time, flow rate, pressure, temperature, water vapor production, energy consumption and other data.

[0054] As a further scheme, in step S2, the pressure-raising, pressure-maintaining and pressure-releasing treatment processes of the subcritical water pyrolysis reactor 3 are specifically as follows: first, the pressure is raised to 1.6 MPa, the temperature reaches 150°C, and the pressure-raising process lasts for 18-22 minutes; then, the pressure is maintained for 9-11 minutes, and finally, the pressure is released to 0 MPa, the temperature is greater than 100°C, and the pressure-releasing process lasts for 9-11 minutes. During the feeding, pressure-raising and pressure-maintaining processes, the stirring blades of the subcritical water pyrolysis reactor 3 turn in the forward direction, and the speed is 15-20 rpm; in the pressure-releasing link, stirring is stopped; after the pressure-releasing is completed, the material is discharged, at this time, the stirring blade turns in the reverse direction, the speed is 20 rpm, and the discharge time is 10 minutes.

[0055] Specifically, after the feeding is completed and it is confirmed that the feeding valve of the water pyrolysis reactor 3 is closed, the time sequence electronic control system can be started. After the time sequence electronic control system detects that the positions of each valve and the signal of the reactor stirring mechanism are normal, the valve of the electronically controlled steam storage tank 4 is opened, and the subcritical water pyrolysis process program is executed according to the set step sequence and pressure temperature, stirring positive and negative direction, speed and other parameters. The subcritical water pyrolysis process timing is controlled 60 seconds and 30 seconds before the material is about to be processed. The buzzer alarm will send out sound reminder signals respectively, among which the second 30-second sound reminder signal must be manually released, and the manual operation of pressure relief is taken over according to the instructions of the electronic control display screen. After the electronic control display confirms that the pressure relief is completed, the discharge valve of the subcritical water pyrolysis reactor 3 can be opened to discharge the material, otherwise opening the discharge valve is regarded as an invalid operation and is displayed.

[0056] The discharge operation of the hydrothermolysis material is that the discharge valve of the subcritical water pyrolysis reactor 3 is connected to the inlet of the buffer tank 61, and the material is discharged by gravity in the vertical direction. When the buffer tank 61 detects no discharge signal, it means that the discharge of the subcritical water pyrolysis reactor 3 is completed. This discharge process takes about 10 minutes.

[0057] After the discharge operation is completed, the discharge valve of the subcritical water pyrolysis reactor 3 is closed, and the feed valve of the subcritical water pyrolysis reactor 3 is opened to repeat the feeding. If the discharge valve is not in the closed state, the operation of opening the feed valve is regarded as an invalid operation and is displayed.

[0058] The material entering the buffer tank 61 is sent to the solid-liquid separator 62 by a scraper or a screw pump for solid-liquid separation. The solid-liquid separation operation time width is 45 minutes. The separated solid material has a water content of 57%. The solid material is piled on the hardened ground of the aerobic fermentation area 7. The hardened ground is buried with a PE air supply pipe every 0.75 meters. The PE air supply pipe is slightly lower than the ground. There are 6 mm diameter air outlets on the 2.5 cm lines on both sides of the center line of the upper end of the pipe. The air outlets on the lines on both sides are arranged crosswise, and the distance between the two air outlets is 20 cm. The high-pressure fan is used for frequency conversion interval air supply. The fan start and stop time is adjustable and controllable. The solid material is piled up to 0.8-1.0 meters. For about 8 days, the water content of the solid material can reach about 40%, and there is no need to turn the pile during this period; the temperature of the liquid material separated by the solid-liquid separator 62 is above 60°C, and it is pumped to the high-temperature anaerobic fermentation treatment device 8 by a high-temperature pump for anaerobic fermentation and reprocessing.

[0059] When the water content of the solid material in the aerobic fermentation zone 7 reaches about 40%, it can be moved to a place with good ventilation and high temperature for further dehydration. During this period, it can be turned and crushed by a compost turning machine. Generally, within 5 days, the water content can be close to about 30%, and it can be packaged after screening. The material is completely harmless, and all indicators are higher than the 525 standard of organic fertilizer. It is a high-quality carrier for producing high-end biological fertilizers, biological feeds, and biological pesticides, and its value is much higher than that of traditional fermented fertilizers. The most obvious effect of using it as a fertilizer is that crop diseases and insect pests have dropped sharply, reducing the use of pesticides. This is due to the complete harmlessness of pyrolysis fertilizers, which has eliminated the opportunity of weed seeds and pathogens to re-enter the soil and reproduce from the source; the high pyrolysis conversion efficiency of multiple nutrients, the organic fertilizer is rich in organic matter and nutrient diversity, and the unique advantages of natural and reasonable nutrient ratios make it possible to exert its maximum in the season, and it is quickly absorbed and differentiated by plants and soil microorganisms. The comprehensive nutrients also improve the utilization rate of inorganic nutrients, realize the improvement of crop immunity and stress resistance, and reduce the chance of infection and disease.

[0060] After dual treatment of subcritical water pyrolysis and high-temperature anaerobic fermentation, the separation performance of the biogas slurry is greatly improved. The organic matter in the manure produced by hydrothermal pyrolysis has become a substance that is easily decomposed by anaerobic bacteria, which shortens the residence time of the subsequent high-temperature anaerobic fermentation and increases the replacement rate of organic matter into biogas.

[0061] The amount of biogas produced by the anaerobic fermentation of feces after subcritical water pyrolysis is more than 1.5 times that of direct anaerobic fermentation, and the biochemical digestion of organic matter in the water is more than 3 times that of direct anaerobic fermentation, while the retention time is only one-third of that of direct anaerobic fermentation. After high-temperature anaerobic fermentation, the content of organic matter in the water is greatly reduced. Through the physical filtration treatment of the slag-liquid separation equipment, the ideal slag-liquid separation effect can be obtained. No flocculation chemicals are required, which greatly simplifies the water treatment procedure, reduces the water treatment cost, meets the resource utilization needs of large amounts of water and fertilizer in agriculture, and eliminates many inconveniences and economic burdens of traditional water treatment discharge.

[0062] Among them, the water used for field and garden irrigation can be filtered through 60 mesh, and the water used for facility agriculture and drip irrigation spray can be filtered through 150 mesh. It can also be used as a carrier and diluent for water-soluble fertilizers, and can be disinfected by ozone and decolorized and deodorized. It can be supplied to piglets and other animals for showering, drinking and site cleaning. The biogas slurry water has the effect of sterilization and deodorization.

[0063] A test was conducted on a batch of solid materials in aerobic fermentation zone 7 in the embodiment of the present invention, and the test results are shown in Table 1 below.

[0064] Table 1:

[0065]

[0066]

[0067] The effects of the present invention are as follows:

[0068] 1. Rapid, efficient, and simple full-scale treatment of manure pollution, improving the height and width of resource utilization. Since hydrothermal decomposition expands the surface area of ​​manure raw materials and auxiliary materials and produces countless pores, the odor accumulated on the manure can be released and discharged with the steam, and the hydrothermal decomposition process of manure materials can be deodorized. Hydrothermal decomposition decomposes and weakens strong gases such as ammonia and hydrogen sulfide. At the same time, the precipitated manure odor is interwoven with the taste of auxiliary materials and diluted, reducing the burden on the biological deodorization device 12, which is very beneficial to the subsequent biological differentiation and degradation of deodorizing bacteria, and ensuring the exhaust gas treatment effect. Industrialized treatment of manure is convenient for the concentration and effective collection of waste gas, and achieves a simple, effective method with the lowest cost at the same time without waste gas pollution in the manure treatment site.

[0069] 2. The subcritical water pyrolysis of the present invention is a fully quantitative treatment process and system for the regeneration of livestock and poultry manure resources. Some elements in the auxiliary materials are used, and even a very small amount of silica (SiO2) and lime (CaO) and other additives can be added when necessary, so that the calcium in the stone powder and lime can be synthesized with the heavy metals in the manure to synthesize reactants that cannot be obtained at room temperature, such as synthesizing a calcium silicate (5CaO·6SiO2·5H2O) with heavy metals embedded inside, which becomes a chemically very stable crystal. In nature, the crystal can only dissolve heavy metals unless it encounters strong sulfuric acid or high temperature and high pressure. This calcium silicate crystal cannot be absorbed by plant roots, thereby effectively solidifying and cutting off the harm of heavy metals in manure to the ecological cycle chain. Antibiotics, viruses, bacteria, weed seeds and other proteins and nucleic acids of all life are degraded and inactivated under subcritical water pressure and temperature process conditions. These effects are difficult to achieve with existing traditional treatment technologies.

[0070] 3. Manure waste can be cleaned up in the shortest time, which is a simple, cheap and effective measure for biological hygiene. Timely cleaning of manure is to cut off the breeding ground of flies, mosquitoes, rats and viruses and the source of disease transmission. The subcritical water pyrolysis full-quantity treatment of livestock and poultry manure resource regeneration process and system of the present invention is rapid, efficient and simple, and can achieve effective harmless cleaning of manure waste in the shortest time on a regular basis.

[0071] 4. The resource recycling products (biofertilizer, feed, pesticide carrier, and reclaimed water reuse) of the subcritical water pyrolysis full-scale treatment of livestock and poultry manure resource recycling process and system of the present invention are completely harmless, and organic matter is reduced to small molecules. It is a recycled resource product that is free of pathogens, weed seeds, antibiotics, and heavy metals are effectively treated. It contains a variety of natural nutrients in reasonable proportions and is easily absorbed and differentiated by plants, animals, and microorganisms. It is a high-quality carrier for promoting the development of biotechnology. The high-value economy of the recycled resource products highlighted is incomparable to the existing traditional manure treatment processes and equipment.

[0072] 5. The subcritical water pyrolysis fully quantitative treatment of livestock and poultry manure resource regeneration process and system of the present invention can quickly, efficiently, simply and without secondary pollution treat manure waste, which is conducive to reducing the environmental burden of local vigorous development of breeding industry, so as to establish a production chain for environmentally friendly waste disposal, development of breeding scale, feed, slaughter, transportation industry and production chain base for processing and producing high-end agricultural products such as biological organic and inorganic fertilizers, biological feed, and biological pesticides. Centralized production is conducive to product supervision, quality improvement, employment, and value enhancement. The subcritical water pyrolysis fully quantitative treatment of livestock and poultry manure resource regeneration process and system can give full play to the economic role of revitalizing manure waste. Its ecological strategic benefits of revitalizing rural areas will surely far exceed the current production economic benefits of subcritical water pyrolysis full quantitative treatment of manure and resource utilization;

[0073] 6. The subcritical water pyrolysis fully quantitative treatment of livestock and poultry manure resource recycling process and system, the market sales price of resource recycling products is higher than the current existing treatment technology products. Selling products to obtain economic benefits is the most important way for enterprises to achieve economic benefits. Therefore, this technology and system is the project with the fastest return on investment for enterprises in similar treatment projects, which is incomparable to other process equipment for treating manure waste and resource recycling projects.

[0074] 7. Subcritical water pyrolysis fully quantitative treatment of livestock and poultry manure resource recycling process and system. The supply of manure raw materials is stable and developing. The market demand for the tail products produced by the subcritical water pyrolysis treatment of livestock and poultry manure resource recycling process and equipment is broad, and there is still a lot of market space to be developed and improved. Therefore, the environmental benefits, social benefits and economic benefits of the subcritical water pyrolysis fully quantitative treatment of livestock and poultry manure resource recycling process and equipment project are mutually unified, stable and reliable.

[0075] 8. The subcritical water pyrolysis fully quantitative treatment of livestock and poultry manure resource recycling process and system can be used to process dead animals, straw, sludge, kitchen waste, domestic wet garbage, and treat soil contaminated by heavy metals with a little modification and supplementation, achieving environmentally friendly treatment and resource recycling.

[0076] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. Subcritical water pyrolysis fully quantitative treatment of livestock and poultry manure resource regeneration system, characterized in that: include: The metering and buffering device (2) is used to receive manure raw materials and straw auxiliary materials, and to perform metering control on the raw materials and / or auxiliary materials by using the dual functions of volume and weight to prepare a mixed material; A subcritical water pyrolysis reactor (3) is used to receive the mixed material and perform a subcritical water pyrolysis process reaction procedure on the mixed material; Solid-liquid separation equipment (6), used for performing solid-liquid separation on the hydrothermolysis material discharged from the kettle; The aerobic fermentation zone (7) is used to store the solid materials after solid-liquid separation, further evaporate the water, and use them as biofertilizer, feed or pesticide carrier; A high temperature anaerobic fermentation treatment device (8) is used to receive the liquid material after solid-liquid separation and produce biogas; The biogas purification and storage device (10) is used to receive and store the produced biogas, provide fuel gas energy to the steam generator (5), the steam generator (5) generates water vapor, and inputs high-temperature and high-pressure water vapor into the subcritical water pyrolysis reactor (3) through the steam storage tank (4).

2. The subcritical water pyrolysis fully quantitative treatment livestock and poultry manure resource regeneration system according to claim 1 is characterized in that: It also includes a residue-liquid separation device (9) for separating residue from liquid in the biogas slurry water produced by high-temperature anaerobic fermentation. The separated biogas residue is used as a biological fertilizer, and the separated biogas slurry is used for farmland irrigation, facility agriculture and / or reclaimed water reuse.

3. The subcritical water pyrolysis fully quantitative treatment livestock and poultry manure resource regeneration system according to claim 2 is characterized in that: The invention also comprises a biological deodorization device (12) and a raw material pool (1) for caching manure raw materials. The biological deodorization device (12) is connected to the raw material pool (1) and the pressure relief pool (11) respectively through a negative pressure pipeline, and is used to suck the waste gas discharged from the raw material pool (1) and the pressure relief pool (11) and discharge it with deodorization. The pressure relief pool (11) is connected to the pressure relief port of the subcritical water pyrolysis reactor (3) through a pipeline.

4. The subcritical water pyrolysis fully quantitative treatment livestock and poultry manure resource regeneration system according to claim 3 is characterized in that: The high-temperature anaerobic fermentation treatment device (8) comprises an anaerobic fermentation tank (81), the bottom of the anaerobic fermentation tank (81) is butt-jointed with a liquid inlet pipe (82) for receiving liquid materials, the lower end of the anaerobic fermentation tank (81) is provided with a water distributor (86) corresponding to the liquid inlet end, the upper end of the anaerobic fermentation tank (81) is provided with a three-phase separator (87), an anaerobic sludge bed (85) is filled between the three-phase separator (87) and the water distributor (86), the upper outer wall of the anaerobic fermentation tank (81) is butt-jointed with a biogas discharge pipe (83) for discharging biogas water, and the top of the anaerobic fermentation tank (81) is butt-jointed with a biogas discharge pipe (84) for discharging biogas.

5. A method for regenerating livestock and poultry manure resources by fully quantifying the treatment of livestock and poultry manure by subcritical water pyrolysis, characterized in that: The subcritical water pyrolysis fully quantitative treatment livestock and poultry manure resource regeneration system according to claim 4 comprises the following steps: S1, using fresh manure as raw material and crushed straw as auxiliary material, adding the raw material and auxiliary material into a subcritical water pyrolysis reactor (3) according to the proportion; S2, inputting high-temperature and high-pressure water vapor into the subcritical water pyrolysis reactor (3) through the steam storage tank (4), and sequentially performing pressure-increasing, pressure-maintaining and pressure-relieving treatments on the subcritical water pyrolysis reactor (3), completing the subcritical water pyrolysis process reaction procedure, and achieving the requirements of harmless and low-molecular-weight manure; wherein the water vapor in the steam storage tank (4) is provided and supplemented by the steam generator (5); S3, extracting the hydrothermolysis material from the subcritical hydrothermolysis reactor (3), and performing solid-liquid separation on the hydrothermolysis material exiting the reactor; S4, the separated solid materials are piled up in the aerobic fermentation area (7) to further evaporate the water to meet the water content requirements of various resource products; the separated liquid materials are introduced into the high temperature anaerobic fermentation treatment device (8); S5. The biogas produced by the high-temperature anaerobic fermentation is introduced into the biogas purification and storage device (10) to provide fuel gas energy to the steam generator (5); the biogas slurry water produced by the high-temperature anaerobic fermentation is separated into residue and liquid, the separated biogas residue is used as a biofertilizer, and the separated biogas slurry is used for farmland irrigation, facility agriculture and / or reclaimed water reuse.

6. The method for fully quantifying livestock and poultry manure resource regeneration by subcritical water pyrolysis according to claim 5 is characterized in that: The specific process of step S1 is as follows: First, a screw pump or a scraper is used to convey the raw material to the metering and buffering device (2), and then, according to the proportion, an auxiliary material is conveyed to the metering and buffering device (2) by air force or a belt conveyor to form a mixed material for standby use, wherein the metering and buffering device (2) measures and controls the raw material and / or auxiliary material by means of both volume and weight, and the final volume of the mixed material measured and buffered each time is less than 70% of the internal volume of the subcritical water pyrolysis reactor (3); Next, a screw pump or a scraper is used to transport the prepared mixed material to a subcritical water pyrolysis reactor (3).

7. The method for fully quantifying livestock and poultry manure resource regeneration by subcritical water pyrolysis according to claim 6, characterized in that: In step S1, when the water content of the raw material or the mixture is greater than 78%, a screw pump is used to pump and transport the raw material; when the water content of the raw material or the mixture is 78% or less, a scraper is used to transport the raw material.

8. The method for fully quantifying livestock and poultry manure resource regeneration by subcritical water pyrolysis according to claim 6 is characterized in that: In the metering and buffering process of step S1, 2-10% of auxiliary materials are added based on the solid weight of the manure raw material, and the particle size of the auxiliary materials is less than or equal to 5 mm.

9. The method for fully quantifying livestock and poultry manure resource regeneration by subcritical water pyrolysis according to claim 5, characterized in that: In step S2, the water vapor pressure inside the steam storage tank (4) is set to 2.0 MPa and the temperature is set to 180°C, and the water vapor pressure inside the steam generator (5) is set to 2.5 MPa and the temperature is set to 210°C.

10. The method for fully quantifying livestock and poultry manure resource regeneration by subcritical water pyrolysis according to claim 5, characterized in that: In step S2, the pressure increasing, pressure maintaining and pressure releasing treatment process of the subcritical water pyrolysis reactor (3) is specifically as follows: firstly, the pressure is increased to 1.6Mpa, the temperature reaches 150°C, and the pressure increasing process lasts for 18-22 minutes; then, the pressure is maintained for 9-11 minutes, and finally, the pressure is released to 0Mpa, the temperature is greater than 100°C, and the pressure releasing process lasts for 9-11 minutes. During the feeding, pressure increasing and pressure maintaining processes, the stirring blades of the subcritical water pyrolysis reactor (3) are all turned in the forward direction, and the speed is 15-20 rpm; in the pressure releasing link, stirring is stopped; after the pressure releasing is completed, the material is discharged, at which time, the stirring blade turns in the reverse direction, the speed is 20 rpm, and the material discharging time is 10 minutes.

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