A livestock and poultry manure resource processing system

Abstract

The utility model discloses a system for resource processing of livestock and poultry manure, which belongs to the technical field of environmentally friendly organic solid waste, and includes: a feed hopper, a blending tank, a feed tank, a CSTR reactor, a biogas storage tank, a discharging tank, a transport vehicle, a double-membrane gas holder, a biogas purifier, a booster fan, a biogas generator, a waste heat recovery device, a hot water circulation pump, a solid-liquid separator, a mechanical grille, etc. In the utility model, livestock and poultry manure enters the CSTR reactor after preheating and blending, and the biogas generated by anaerobic digestion is used for power generation after purification and boosting, and the waste heat generated by the generator is used for preheating and heating the blending tank and the CSTR reactor. Biogas and biogas residue are used to make biogas residue fertilizer and farmland irrigation. The utility model has the following characteristics: the amount of livestock and poultry manure is reduced, and the resource processing effect is good; the material energy utilization efficiency is high, forming a good ecological cycle; less waste is discharged during the treatment process, the ecology is environmentally friendly, and the consumption of electricity and heat energy is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmentally friendly organic solid waste, in particular to a livestock and poultry manure resource processing system. Background Art

[0002] With the continuous development of the breeding industry, the scale of livestock and poultry breeding is constantly increasing, and the amount of manure and sewage produced is large. If the manure and sewage of livestock and poultry is not handled in a timely and proper manner, it will inevitably cause serious adverse harm to the living environment. Doing a good job in the treatment and resource utilization of livestock and poultry sewage can not only promote the safe and clean production of the agricultural industry chain, but also realize the resource utilization of livestock and poultry sewage, truly turning waste into treasure.

[0003] The traditional method of piling up and fermenting livestock and poultry manure can no longer meet the needs of modern farming and increasingly stringent environmental protection requirements. Farms often build or purchase special livestock and poultry manure treatment facilities to achieve the purpose of treating livestock and poultry manure, but the investment in equipment and facilities is large, and the high operating costs have become a major concern for farmers. Utility Model Content

[0004] In order to solve the problems in the above-mentioned background technology, the purpose of the utility model is to provide a livestock and poultry manure resource processing system.

[0005] The specific technical solutions are as follows:

[0006] A livestock and poultry manure resource processing system includes: a feed hopper, a blending tank, a feed tank, a CSTR reactor, a biogas storage tank, a discharge tank, a transport vehicle, a double membrane gas holder, a biogas purifier, a booster fan, a biogas generator, a waste heat recovery device, a hot water circulation pump, etc. The blending tank is provided with a first agitator and a gate, the feed tank is provided with a first slurry pump, a mechanical grille is provided between the blending tank and the feed tank, the CSTR reactor is provided with a positive and negative pressure protector, a sampling tube, a discharge pipe, and a second agitator, a solid-liquid separator is provided between the CSTR reactor and the feed hopper, the discharge pipe of the CSTR reactor is connected to the biogas storage tank, a pipeline is provided between the biogas storage tank and the discharge tank, a second slurry pump is provided in the discharge tank, and the biogas purifier is used for at least biogas dehydration and desulfurization.

[0007] To implement the above technical solution, livestock and poultry manure is first put into the feed hopper and then into the blending tank. A first agitator is provided in the blending tank, which is used to mix the materials evenly after stirring for a certain period of time. After the materials are evenly mixed, the gate between the blending tank and the feed tank is opened. The materials pass through a mechanical grille to remove larger debris in the manure and then enter the feed tank. The materials are transported to the CSTR reactor for anaerobic fermentation through the first slurry pump. A second agitator is provided in the CSTR reactor to keep the materials in a fully mixed state, and the anaerobic reaction is fully carried out under suitable alkalinity and temperature conditions. Part of the biogas residue and liquid from the CSTR reactor is separated into solid and liquid by a solid-liquid separator, and the remaining part flows into the biogas storage tank for storage and is transported to the farmland by a transport vehicle. The biogas enters the double membrane gas cabinet for storage through the biogas purifier, and after dehydration, desulfurization and other treatments, it is adjusted to an appropriate pressure by a booster fan and then transported to the biogas generator for power generation. The positive and negative pressure protector is used to set the pressure alarm range according to the gas production capacity in the CSTR reactor to ensure the structural safety of the CSTR reactor.

[0008] As a preferred solution of the utility model, the waste heat recovery device is used to provide heat for preheating the mixing tank and heating the CSTR reactor. A first heating coil is also provided in the mixing tank, and a second heating coil is also provided in the CSTR reactor.

[0009] To implement the above technical solution, a first heating coil is provided in the blending tank, a second heating coil is provided in the CSTR reactor, and a waste heat recovery device is used to recover the waste heat generated by the biogas generator. The heated water is respectively sent to the blending tank and the CSTR reactor by the action of a hot water circulation pump to preheat the new material in the blending tank, while ensuring that the reaction in the CSTR reactor reaches a stable operating temperature, maintaining the material temperature in the tank within the temperature range required for medium-temperature anaerobic fermentation, and ensuring the normal and stable operation of anaerobic fermentation.

[0010] As a preferred solution of the utility model, an air connecting pipe is provided on the upper part of the discharge pipe; the biogas slurry is discharged in the form of high-level overflow discharge, no valve is provided, the pipe mouth is arranged obliquely and is located below the working liquid level; the biogas residue is discharged by gravity, and a double valve is provided in the pipe section.

[0011] To implement the above technical solution, the outlet of the discharge pipe is set obliquely and located below the working liquid level. The structure is simple and reasonable. The pipeline setting allows the pipe section to form a water seal to prevent the biogas in the CSTR reactor from escaping with the discharge pipe. The setting of the air connecting pipe can make the discharge pipe discharge smoothly and ensure the constant liquid level in the CSTR reactor. A rain cap is also set above the air connecting pipe to prevent rain and snow from affecting the discharge quality. The position of the biogas residue in the CSTR reactor is relatively low, and the discharge method relies on gravity pressure. The setting of the double valve establishes a guarantee for the normal operation of the CSTR reactor.

[0012] As a preferred solution of the utility model, a biogas slurry return pipe leading to the feed hopper and a biogas slurry discharge pipe leading to the biogas slurry storage tank are provided behind the solid-liquid separator.

[0013] To implement the above technical solution, the biogas slurry return pipe is used to transport a portion of the returned biogas slurry to the feed hopper as blending water, and the remaining biogas slurry is transported to the biogas slurry storage tank through the biogas slurry discharge pipe.

[0014] In summary, the utility model has the following beneficial effects:

[0015] (1) The reduction and resource utilization of livestock and poultry manure are effective.

[0016] (2) High efficiency in material and energy utilization, forming a good ecological cycle.

[0017] (3) The treatment process produces less waste, is environmentally friendly, and saves electricity and heat energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constitute a part of the specification and are used to assist in explaining the present utility model and deepen the understanding of the present utility model, but do not constitute a limitation of the present utility model.

[0019] Figure 1 This is a schematic diagram of the structure of a livestock and poultry manure resource treatment system of the utility model;

[0020] Figure 2 It is a schematic diagram of the feed hopper, the mixing tank and the feed tank in the utility model;

[0021] Figure 3 It is a schematic diagram of the first heating coil in the utility model;

[0022] Figure 4 The second heating coil in the utility model is shown in FIG. Figure 1 ;

[0023] Figure 5 The second heating coil in the utility model is shown in FIG. Figure 2 ;

[0024] Figure 6 This is a schematic diagram of the discharge pipe in the utility model;

[0025] Explanation of the reference numerals: 1 feed hopper; 2 blending tank; 3 feed tank; 4 CSTR reactor; 5 double membrane gas holder; 6 booster fan; 7 biogas generator; 8 waste heat recovery device; 9 hot water circulation pump; 10 biogas purifier; 11 biogas slurry discharge pipe; 12 solid-liquid separator; 13 positive and negative pressure protector; 14 safety valve; 15 gas holder fan; 16 transport vehicle; 17 biogas slurry storage tank; 18 discharge tank; 19 biogas slurry reflux pipe; 20 sampling tube; 21 discharge pipe; 22 first agitator; 23 gate; 24 mechanical grille; 25 first slurry pump; 26 second agitator; 27 second slurry pump; 28 first heating coil; 29 second heating coil. DETAILED DESCRIPTION

[0026] In order to make the process structure, technical features and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings. Specific embodiment:

[0028] Reference Figure 1-6 A livestock and poultry manure resource processing system includes: a feed hopper 1, a mixing tank 2, a feed tank 3, a CSTR reactor 4, a biogas storage tank 17, a discharge tank 18, a transport vehicle 16, a double membrane gas holder 5, a biogas purifier 10, a booster fan 6, a biogas generator 7, a waste heat recovery device 8, a hot water circulation pump 9, etc. The blending tank 2 is provided with a first agitator 22 and a gate 23, the feeding tank 3 is provided with a first slurry pump 25, a mechanical grille 24 is provided between the blending tank 2 and the feeding tank 3, the CSTR reactor 4 is provided with a positive and negative pressure protector 13, a sampling tube 20, a discharge pipe 21, and a second agitator 26, a solid-liquid separator 12 is provided between the CSTR reactor 4 and the feed hopper 1, the discharge pipe 21 of the CSTR reactor 4 is connected to the biogas storage tank 17, a pipeline is provided between the biogas storage tank 17 and the discharge tank 18, a second slurry pump 27 is provided in the discharge tank 18, and the biogas purifier 10 is at least used for biogas dehydration and desulfurization.

[0029] The livestock and poultry manure is first put into the feed hopper 1 and then enters the blending tank 2. The blending tank 2 is provided with a first agitator 22, which is used to mix the materials evenly after stirring for a certain period of time. After the materials are evenly mixed, the gate 23 between the blending tank 2 and the feed tank 3 is opened, and the materials pass through the mechanical grille 24 to remove the larger debris in the manure and then enter the feed tank 3, and are transported to the CSTR reactor 4 for anaerobic fermentation through the first slurry pump 25. The CSTR reactor 4 is provided with a second agitator 26 to make the materials in a fully mixed state, and the anaerobic reaction is fully carried out under suitable alkalinity and temperature conditions. Part of the biogas residue and liquid from the CSTR reactor 4 is separated into solid and liquid by the solid-liquid separator 12, and the remaining part flows into the biogas liquid storage tank 17 for storage, and is transported to the farmland by the transport vehicle 16. The biogas enters the double membrane gas cabinet 5 for storage through the biogas purifier 10, and after dehydration, desulfurization and other treatments, it is adjusted to an appropriate pressure by the booster fan 6 and then transported to the biogas generator 7 for power generation. The positive and negative pressure protector 13 is used to set the pressure alarm range according to the gas production capacity in the CSTR reactor 4 to ensure the structural safety of the CSTR reactor 4.

[0030] The waste heat recovery device 8 is used to provide heat for preheating the blending tank 2 and heating the CSTR reactor 4. The blending tank 2 is also provided with a first heating coil 28, and the CSTR reactor 4 is also provided with a second heating coil 29. The first heating coil 28 is provided in the blending tank 2, and the second heating coil 29 is provided in the CSTR reactor 4. The waste heat recovery device 8 is used to recover the waste heat generated by the biogas generator 7. The heated water is respectively sent to the blending tank 2 and the CSTR reactor 4 under the action of the hot water circulation pump 9, which is used to preheat the new materials in the blending tank 2, and at the same time ensure that the reaction in the CSTR reactor 4 reaches a stable operating temperature, maintain the temperature of the materials in the tank within the temperature range required for medium-temperature anaerobic fermentation, and ensure the normal and stable operation of anaerobic fermentation.

[0031] An air connecting pipe is provided on the upper part of the discharge pipe 21; the discharge of biogas slurry is in the form of high-level overflow discharge, without valves, and the pipe mouth is set obliquely and located below the working liquid level; the biogas residue is discharged by gravity, and the pipe section is provided with double valves. The pipe mouth of the discharge pipe 21 is set obliquely and located below the working liquid level. The structure is simple and reasonable. The pipeline setting forms a water seal in the pipe section to prevent the biogas in the CSTR reactor 4 from escaping with the discharge pipe 21. The setting of the air connecting pipe can make the discharge of the discharge pipe 21 stable and smooth, and ensure the constant liquid level in the CSTR reactor 4. A rain cap is also provided above the air connecting pipe to prevent rain and snow from affecting the discharge quality. The position of the biogas residue in the CSTR reactor 4 is relatively low, and the discharge method relies on gravity pressure discharge. The setting of the double valves is to establish a guarantee for the normal operation of the CSTR reactor 4.

[0032] A biogas slurry return pipe 19 leading to the feed hopper 1 and a biogas slurry discharge pipe 11 leading to the biogas slurry storage tank 17 are arranged behind the solid-liquid separator 12. The biogas slurry return pipe 19 is used to transport a portion of the returned biogas slurry to the feed hopper 1 as blending water, and the remaining biogas slurry is transported to the biogas slurry storage tank 17 through the biogas slurry discharge pipe 11.

[0033] In summary, the utility model provides a livestock and poultry manure resource treatment system, which has good livestock and poultry manure reduction and resource treatment effects, high material and energy utilization efficiency, forms a good ecological cycle, reduces waste emissions during the treatment process, is environmentally friendly, and saves electricity and heat energy consumption.

Claims

1. A livestock and poultry manure resource processing system, characterized in that: include: A feed hopper, a blending tank, a feed tank, a CSTR reactor, a biogas slurry storage tank, a discharge tank, a transport vehicle, a double-membrane gas holder, a biogas purifier, a booster fan, a biogas generator, a waste heat recovery device, and a hot water circulation pump. The blending tank is provided with a first agitator and a gate, the feed tank is provided with a first slurry pump, a mechanical grille is provided between the blending tank and the feed tank, the CSTR reactor is provided with a positive and negative pressure protector, a sampling tube, a discharge pipe, and a second agitator, a solid-liquid separator is provided between the CSTR reactor and the feed hopper, the discharge pipe of the CSTR reactor is connected to the biogas slurry storage tank, a pipeline is provided between the biogas slurry storage tank and the discharge tank, a second slurry pump is provided in the discharge tank, and the biogas purifier is at least used for biogas dehydration and desulfurization.

2. The livestock and poultry manure resource treatment system according to claim 1 is characterized in that: The waste heat recovery device is used to provide heat for preheating the blending tank and heating the CSTR reactor. A first heating coil is also provided in the blending tank, and a second heating coil is also provided in the CSTR reactor.

3. The livestock and poultry manure resource processing system according to claim 1 is characterized in that: An air connecting pipe is arranged on the upper part of the discharge pipe; the biogas slurry is discharged in the form of high-level overflow discharge, without valve, and the pipe mouth is arranged obliquely and located below the working liquid level; the biogas residue is discharged by gravity, and a double valve is arranged in the pipe section.

4. The livestock and poultry manure resource treatment system according to claim 1 is characterized in that: A biogas slurry return pipe leading to the feed hopper and a biogas slurry discharge pipe leading to the biogas slurry storage tank are arranged behind the solid-liquid separator.

Images