A system for synergistically treating poultry waste, sludge and household garbage

Abstract

The application discloses a kind of poultry waste, sludge and domestic waste collaborative processing system, belong to garbage processing technical field.Its poultry waste carbonization furnace includes carbonization outer chamber, carbonization inner chamber and sludge drying chamber from outside to inside, the flue gas import of carbonization outer chamber is connected with the flue gas export of combustion tower, the flue gas import of sludge drying chamber is connected with the flue gas export, the poultry waste feed inlet of carbonization inner chamber is connected with the poultry waste discharge port of drying furnace, carbonization material export is connected with carbonization material collection device, the gas import of combustion tower is connected with carbonization gas export, the sludge feed inlet of combustion furnace is connected with the drying sludge discharge port of sludge drying chamber, the flue gas import of combustion tower is connected with the flue gas export.The application can realize the reduction of poultry waste and sludge, harmless treatment, optimize domestic waste incineration process, reduce pollutant emission, while reasonable use of energy, give full play to the advantage of collaborative disposal.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of waste treatment, and particularly relates to a system for synergistically treating poultry and livestock waste, sludge and household garbage. BACKGROUND

[0002] Sludge is complex in composition, high in organic matter and water content, prone to spoilage and having foul odor, and rich in pathogenic organisms such as parasitic eggs, bacteria, viruses and organic pollutants such as antibiotics, which can easily cause pollution source diffusion and pollute soil, water sources, air and even food chains through various channels, seriously threatening human health and environmental safety.

[0003] Meanwhile, with the development of the breeding industry, the output of poultry and livestock waste is increasing, and the pollution is serious. The traditional composting method can only kill general pathogenic microorganisms. Since the highest temperature of natural fermentation is 70℃, it cannot solve the problems of pesticide residues that may be carried in auxiliary materials, and antibiotics, antibiotic resistance genes (super bacteria) contained in manure, and cannot solve the problem of heavy metal pollution contained.

[0004] At present, poultry and livestock waste and sludge are generally treated separately, which is costly, and the traditional landfill and composting methods cannot achieve reduction and harmlessness. Poultry and livestock waste can be energyized through biogas engineering, but a separate plant needs to be built, which requires high investment and technical requirements and is prone to secondary pollution. Household garbage is mainly treated by incineration technology. With the improvement of environmental protection standards, the NOx content in flue gas is increasing, and the treatment cost is also increasing. x SUMMARY

[0005] The technical problem solved by the present application is that a system for synergistically treating poultry and livestock waste, sludge and household garbage is provided, which can achieve reduction and harmlessness of poultry and livestock waste and sludge, optimize the incineration process of household garbage, reduce pollutant emissions, and reasonably utilize energy while fully utilizing the advantages of synergistic disposal.

[0006] ​Technical Solution: A co-processing system for livestock waste, sludge, and municipal solid waste includes a drying furnace, a livestock waste carbonization furnace, a combustion tower, an air preheater, a combustion furnace, and a waste heat boiler. The drying furnace is equipped with a livestock waste inlet. The livestock waste carbonization furnace includes, from the outside in, a carbonization outer chamber, a carbonization inner chamber, and a sludge drying chamber. The flue gas inlet of the carbonization outer chamber is connected to the flue gas outlet of the combustion tower, and the flue gas outlet of the carbonization outer chamber is connected to the flue gas inlet of the sludge drying chamber. The livestock waste inlet of the carbonization inner chamber is connected to the livestock waste outlet of the drying furnace, and the carbonized material outlet of the carbonization inner chamber is connected to... A carbonized material collection device is connected; the carbonized gas outlet of the carbonization chamber is connected to the gas inlet of the combustion tower; the sludge drying chamber is equipped with a sludge inlet; the dried sludge outlet of the sludge drying chamber is connected to the sludge inlet of the combustion furnace; the flue gas outlet of the sludge drying chamber is connected to the flue gas inlet of the combustion tower; the combustion furnace includes a grate at the bottom, a furnace in the middle, and a flue at the top; the grate is equipped with a domestic waste inlet and a sludge inlet; the flue is connected to a waste heat boiler; the air outlet of the air preheater is connected to the air inlet of the combustion tower and the air inlet of the grate respectively; the steam outlet of the waste heat boiler is connected to a steam turbine.

[0007] Preferably, the furnace is provided with a carbonization flue gas nozzle, and the flue gas inlet of the carbonization flue gas nozzle is connected to the flue gas outlet of the carbonization outer chamber.

[0008] Furthermore, the furnace is equipped with a secondary air nozzle, the air inlet of which is connected to the air outlet of the air preheater, and the airflow direction of the secondary air nozzle is opposite to that of the carbonization flue gas nozzle.

[0009] Furthermore, the furnace is equipped with a flue gas recirculation nozzle, which is located above the carbonization flue gas nozzle and the secondary air nozzle. Its flue gas inlet is connected to the flue gas recirculation intake port of the tail flue of the waste heat boiler.

[0010] Preferably, the grate includes, from top to bottom, a carbonization section, a combustion section, a burnout section, and a slag dump. The air inlets of the carbonization section, the combustion section, and the burnout section are respectively connected to the air outlet of the air preheater via pipelines, and each of the connecting pipelines is equipped with a flow control valve.

[0011] Furthermore, a heat storage arch is provided above the carbonization section, and the heat storage arch is provided with carbonization gas vents.

[0012] Preferably, the waste heat boiler is provided with an ash hopper at the bottom.

[0013] Preferably, the steam inlet of the drying furnace is connected to the steam outlet of the combustion furnace, and the exhaust gas outlet of the drying furnace is connected to the flue gas purification device.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The heat required for drying livestock and poultry waste is provided by a combustion furnace, and the exhaust gas generated during drying is connected to the flue gas purification device of the original waste incineration process to meet emission standards, thus reducing equipment investment.

[0016] 2. By coupling the carbonization of livestock and poultry waste with the drying of sludge, the equipment footprint is reduced and investment is lowered.

[0017] 3. The reasonable layout of the carbonization furnace, combustion tower, sludge drying chamber and flue gas pipeline for livestock and poultry waste, and the reasonable utilization of flue gas waste heat, can improve energy utilization efficiency.

[0018] 4. Livestock waste is carbonized using external heating, which results in high carbonization efficiency, high-quality carbonized material, and the ability to be reused.

[0019] 5. The design of the grate carbonization section divides the combustion process of municipal solid waste and sludge into two processes: carbonization and incineration, which is beneficial for controlling the combustion process and the generation of pollutants.

[0020] 6. The design of the heat storage arch completely separates the carbonization process of municipal solid waste and sludge from the incineration process, while the heat storage capacity of the heat storage arch ensures the smooth progress of the carbonization process.

[0021] 7. The carbonization flue gas nozzle design ensures that the flue gas generated from the carbonization of poultry and livestock waste enters the combustion furnace without producing secondary pollution.

[0022] 8. The design of the secondary air nozzle, which is opposed to the carbonization flue gas nozzle, enhances the turbulence inside the furnace and optimizes the flow field inside the furnace while ensuring complete combustion inside the furnace.

[0023] 9. The design of the flue gas recirculation nozzle reduces NO in the furnace. x The generation of . Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] The numbers in the diagram represent the following: 1. Drying furnace, 2. Livestock waste carbonization furnace, 3. Combustion tower, 4. Air preheater, 5. Combustion furnace, 6. Waste heat boiler, 7. Carbonized material collection device, 21. Carbonization outer chamber, 22. Carbonization inner chamber, 23. Sludge drying chamber, 51. Grate, 52. Furnace, 53. Flue, 511. Carbonization section, 512. Combustion section, 513. Burnout section, 514. Slag dump, 515. Heat storage arch, 521. Carbonization flue gas nozzle, 522. Secondary air nozzle, 523. Flue gas recirculation nozzle, 61. Ash hopper. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Example 1

[0027] like Figure 1 As shown, a co-processing system for livestock waste, sludge, and domestic waste includes a drying furnace 1, a livestock waste carbonization furnace 2, a combustion tower 3, an air preheater 4, a combustion furnace 5, and a waste heat boiler 6.

[0028] The drying furnace 1 is equipped with a livestock waste inlet and a livestock waste outlet. The steam inlet of the drying furnace 1 is connected to the steam outlet of the combustion furnace 5, and the exhaust gas outlet of the drying furnace 1 is connected to the flue gas purification device.

[0029] The livestock waste carbonization furnace 2 includes an inner carbonization outer chamber 21, an inner carbonization chamber 22, and a sludge drying chamber 23 connected in a sleeve-like manner from the outside. The flue gas inlet of the outer carbonization chamber 21 is connected to the flue gas outlet of the combustion tower 3, and the flue gas outlet of the outer carbonization chamber 21 is connected to the flue gas inlet of the sludge drying chamber 23. The livestock waste feed inlet of the inner carbonization chamber 22 is connected to the livestock waste discharge outlet of the drying furnace 1. The carbonized material outlet of the inner carbonization chamber 22 is connected to the carbonized material collection device 7. The carbonized gas outlet of the inner carbonization chamber 22 is connected to the gas inlet of the combustion tower 3. The sludge drying chamber 23 is provided with a sludge feed inlet. The dried sludge discharge outlet of the sludge drying chamber 23 is connected to the sludge feed inlet of the combustion furnace 5. The flue gas outlet of the sludge drying chamber 23 is connected to the flue gas inlet of the combustion tower 3.

[0030] The combustion furnace 5 includes a grate 51 at the bottom, a furnace chamber 52 in the middle, and a flue 53 at the top. The grate 51 is provided with a domestic waste inlet and a sludge inlet, and the flue 53 is connected to the waste heat boiler 6. In a preferred embodiment, the grate 51 includes, from top to bottom, a carbonization section 511, a combustion section 512, a burnout section 513, and a slag heap 514. The air inlets of the carbonization section 511, the combustion section 512, and the burnout section 513 are respectively connected to the air outlet of the air preheater 4 through pipes, and each connecting pipe is equipped with a flow control valve. A heat storage arch 515 covers the top of the carbonization section 511, and the heat storage arch 515 is provided with carbonization gas vents. In a preferred embodiment, the furnace chamber 52 is provided with a carbonization flue gas nozzle 521, and the flue gas inlet of the carbonization flue gas nozzle 521 is connected to the flue gas outlet of the carbonization outer chamber 21. The furnace 52 is equipped with a secondary air nozzle 522. The air inlet of the secondary air nozzle 522 is connected to the air outlet of the air preheater 4, and the airflow direction of the secondary air nozzle 522 is opposite to that of the carbonization flue gas nozzle 521. The furnace 52 is also equipped with a flue gas recirculation nozzle 523, which is located above the secondary air nozzle 522 and the carbonization flue gas nozzle 521. Its flue gas inlet is connected to the flue gas recirculation intake port of the tail flue of the waste heat boiler 6.

[0031] The air outlet of the air preheater 4 is connected to the air inlet of the combustion tower 3 and the air inlet of the grate 51, respectively.

[0032] The steam outlet of the waste heat boiler 6 is connected to the steam turbine, and the bottom of the waste heat boiler 6 is provided with an ash hopper 61.

[0033] The system works as follows:

[0034] Livestock waste is fed into drying furnace 1 via a livestock waste drying feed system. The heat required for drying is provided by combustion furnace 5. The exhaust gas generated during drying is treated by a flue gas purification device used in waste incineration to meet emission standards. The dried livestock waste is then transported to livestock waste carbonization furnace 2 and enters the carbonization chamber 22, where it undergoes carbonization in an oxygen-deficient environment. The carbonized material is then transported to carbonized material collection device 7 via a discharge device. The carbonized material can be sold directly as a product or further processed into activated carbon for reuse. The carbonized gas generated during carbonization is transported to combustion tower 3, where it undergoes complete combustion. The air required for combustion is preheated via an air header in air preheater 4 and then branched into combustion tower 3. The high-temperature flue gas generated by the combustion tower 3 is transported to the carbonization outer chamber 21 to provide the heat required for the carbonization of livestock and poultry waste and the drying of sludge. After the flue gas is cooled, part of it is transported to the carbonization flue gas nozzle 521 and injected into the combustion furnace 5, while the other part of the flue gas is returned to the sludge drying chamber 23 for drying the sludge.

[0035] The sludge raw material is sent into the sludge drying chamber 23. After drying in the sludge drying chamber 23, it is directly sent into the waste incinerator 5. The waste gas generated during the drying process is sent into the combustion tower 3 for high-temperature treatment.

[0036] Domestic waste is fed into the combustion furnace 5 through the domestic waste inlet. After entering the combustion furnace 5, the domestic waste and dried sludge first reach the carbonization section 511 of the grate 51. Air heated by the air preheater 4 is then fed into the two carbonization sections 511 on the grate 51. The air volume in the two sections is controlled separately to ensure that the carbonization sections 511 are in a low-oxygen environment. The domestic waste and sludge undergo carbonization in the carbonization chamber formed by the carbonization sections 511 and the heat storage arch 515. The heat storage arch 515 has a certain heat storage capacity and a certain number of carbonization gas vents. The carbonization gas generated by the carbonization of domestic waste and sludge enters the upper part of the furnace 52 through the carbonization gas vents for combustion.

[0037] The carbonized material formed from the carbonization of municipal solid waste and sludge enters the two combustion sections 512 and one burnout section 513 of the grate 51 for complete combustion as the grate 51 moves. The air required for each section is controlled separately to ensure complete combustion of the material. The ash and slag formed after combustion enter the ash chute 514.

[0038] The secondary air nozzle 522 and the carbonization flue gas nozzle 521 are arranged opposite each other. The secondary air is mainly used for the complete combustion of the carbonization gas and a small amount of volatiles generated by the carbonization material in the carbonization section 511, while also opposing the carbonization flue gas to create a uniform flow field. The flue gas recirculation nozzle 523 is located above the secondary air nozzle 522 and the carbonization flue gas nozzle 521, and it draws flue gas with a temperature of 200-300℃. This is used to enhance the turbulence inside the furnace and to create a certain reducing atmosphere in the area of ​​intense combustion inside the furnace, thereby reducing NO. x The generation of .

[0039] The high-temperature flue gas generated from combustion enters the waste heat boiler 6, producing a large amount of steam, which is used for steam turbine power generation. The ash hopper 61 is used to collect the fly ash generated in the flue gas.

Claims

1. A co-processing system for livestock waste, sludge, and domestic waste, characterized in that, The system includes a drying furnace (1), a livestock waste carbonization furnace (2), a combustion tower (3), an air preheater (4), a combustion furnace (5), and a waste heat boiler (6). The drying furnace (1) is equipped with a livestock waste inlet. The livestock waste carbonization furnace (2) includes, from the outside to the inside, a carbonization outer chamber (21), a carbonization inner chamber (22), and a sludge drying chamber (23). The flue gas inlet of the carbonization outer chamber (21) is connected to the flue gas outlet of the combustion tower (3), the flue gas outlet of the carbonization outer chamber (21) is connected to the flue gas inlet of the sludge drying chamber (23), the livestock waste inlet of the carbonization inner chamber (22) is connected to the livestock waste outlet of the drying furnace (1), the carbonized material outlet of the carbonization inner chamber (22) is connected to the carbonized material collection device (7), the carbonization gas outlet of the carbonization inner chamber (22) is connected to the gas inlet of the combustion tower (3), and the sludge drying chamber (23) is equipped with a waste heat boiler. The sludge feed inlet and the dried sludge outlet of the sludge drying chamber (23) are connected to the sludge feed inlet of the combustion furnace (5). The flue gas outlet of the sludge drying chamber (23) is connected to the flue gas inlet of the combustion tower (3). The combustion furnace (5) includes a grate (51) at the bottom, a furnace (52) in the middle and a flue (53) at the top. The grate (51) is provided with a domestic waste feed inlet and a sludge feed inlet. The flue (53) is connected to the waste heat boiler (6). The air outlet of the air preheater (4) is connected to the air inlet of the combustion tower (3) and the air inlet of the grate (51) respectively. The steam outlet of the waste heat boiler (6) is connected to the steam turbine. The grate (51) includes a carbonization section (511), a combustion section (512), a burnout section (513) and a slag dump (514) from top to bottom. The carbonization section (511) is covered with a heat storage arch (515).

2. The co-treatment system for livestock waste, sludge, and domestic waste according to claim 1, characterized in that, The furnace (52) is provided with a carbonization flue gas nozzle (521), and the flue gas inlet of the carbonization flue gas nozzle (521) is connected to the flue gas outlet of the carbonization outer chamber (21).

3. The co-treatment system for livestock waste, sludge, and domestic waste according to claim 2, characterized in that, The furnace (52) is provided with a secondary air nozzle (522), the air inlet of the secondary air nozzle (522) is connected to the air outlet of the air preheater (4), and the airflow direction of the secondary air nozzle (522) is opposite to that of the carbonization flue gas nozzle (521).

4. The co-treatment system for livestock waste, sludge, and domestic waste according to claim 3, characterized in that, The furnace (52) is provided with a flue gas recirculation nozzle (523), which is located above the carbonization flue gas nozzle (521) and the secondary air nozzle (522). Its flue gas inlet is connected to the flue gas recirculation intake port of the tail flue of the waste heat boiler (6).

5. The co-treatment system for livestock waste, sludge, and domestic waste according to claim 1, characterized in that, The air inlets of the carbonization section (511), combustion section (512) and burnout section (513) are respectively connected to the air outlet of the air preheater (4) by pipelines, and each of the connecting pipelines is equipped with a flow control valve.

6. The co-treatment system for livestock waste, sludge, and domestic waste according to claim 1, characterized in that, The heat storage arch (515) is provided with carbonization gas vent holes.

7. The co-treatment system for livestock waste, sludge, and domestic waste according to claim 1, characterized in that, The waste heat boiler (6) is equipped with an ash hopper (61) at the bottom.

8. The co-treatment system for livestock waste, sludge, and domestic waste according to claim 1, characterized in that, The steam inlet of the drying furnace (1) is connected to the steam outlet of the combustion furnace (5), and the exhaust gas outlet of the drying furnace (1) is connected to the flue gas purification device.

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