CN117447039B - Method and integrated equipment for treating municipal sludge using semi-carbonization coupled carbonization process - Google Patents
Method and integrated equipment for treating municipal sludge using semi-carbonization coupled carbonization processInfo
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- CN117447039B CN117447039B CN202210838664.XA CN202210838664A CN117447039B CN 117447039 B CN117447039 B CN 117447039B CN 202210838664 A CN202210838664 A CN 202210838664A CN 117447039 B CN117447039 B CN 117447039B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/02—Multi-step carbonising or coking processes
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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Abstract
本发明属于市政污泥处理技术领域，特别涉及一种半炭化耦合炭化工艺处理市政污泥的方法和集成设备。该集成设备包括采用直接加热的第一热处理炉（10）和采用夹套加热的第二热处理炉（20），第二热处理炉（20）配设第二供热源（21），第一热处理炉（10）的进气端位于其出料端处，第一热处理炉（10）配设第一供热源（11），第一供热源（11）与第一热处理炉（10）的进气端相接；第一热处理炉（10）的出气端与干法除尘装置（12）相接，第二热处理炉（20）的夹套接尾气处理装置（22）。本发明通过引入半炭化的概念，用直接接触的加热方式实现物料的部分炭化，提高了热处理效率，也有助于提高气体的除尘效率。
The present invention belongs to the technical field of municipal sludge treatment, and particularly relates to a method and integrated equipment for treating municipal sludge using a semi-carbonization coupled carbonization process. The integrated equipment comprises a first heat treatment furnace (10) using direct heating and a second heat treatment furnace (20) using jacket heating. The second heat treatment furnace (20) is equipped with a second heat source (21). The air inlet of the first heat treatment furnace (10) is located at its discharge end. The first heat treatment furnace (10) is equipped with a first heat source (11), and the first heat source (11) is connected to the air inlet of the first heat treatment furnace (10). The air outlet of the first heat treatment furnace (10) is connected to a dry dust removal device (12), and the jacket of the second heat treatment furnace (20) is connected to an exhaust gas treatment device (22). The present invention introduces the concept of semi-carbonization and uses a direct contact heating method to achieve partial carbonization of the material, thereby improving the heat treatment efficiency and also helping to improve the dust removal efficiency of the gas.
Description
Technical Field
The invention belongs to the technical field of municipal sludge treatment, and particularly relates to a method and integrated equipment for treating municipal sludge by a semi-carbonization coupling carbonization process.
Background
Municipal sludge is an inevitable by-product in the municipal wastewater treatment process. In recent years, with the rapid increase in sewage treatment capacity, municipal sludge production has also increased dramatically. The sludge contains heavy metals, microorganisms and various other contaminants. The sludge treatment is improper, which can cause the secondary environmental problems of greenhouse gas emission, groundwater pollution, land pollution and the like. At present, municipal sludge drying pyrolysis carbonization technology is of great concern, and the technology has the advantages of high reduction degree, high heavy metal solidification ratio and the like.
The Chinese patent document CN107200458A discloses a municipal sludge treatment method, which adopts a drying furnace and a pyrolysis carbonization furnace to carry out dehydration and pyrolysis carbonization treatment on municipal sludge, the drying furnace and the pyrolysis carbonization furnace are both indirectly heated by adopting a jacketed rotary furnace, the heating temperature of materials in the drying furnace is 100-150 ℃, the drying furnace supplies heat through auxiliary heating smoke generated by an auxiliary drying combustion furnace and pyrolysis furnace jacket smoke led out from a pyrolysis carbonization furnace heating jacket, and the pyrolysis carbonization furnace supplies heat through high-temperature heating smoke generated by a mixed combustion furnace. The pyrolysis carbonization furnace is provided with a pyrolysis gas discharge port, and the pyrolysis gas discharge port is used for sending pyrolysis gas generated in the furnace chamber of the pyrolysis carbonization furnace into the mixed combustion furnace for combustion so as to generate high-temperature heating smoke. The drying efficiency is relatively low due to the fact that the heating temperature in the drying furnace is relatively low and an indirect heating mode is adopted.
The Chinese patent document CN214400194U discloses a municipal sludge drying, pyrolysis and carbonization system, which comprises a drying furnace and a pyrolysis and carbonization furnace, wherein the drying furnace and the pyrolysis and carbonization furnace are both provided with heating jackets, a drying gas delivery pipe is arranged on the drying furnace, the drying gas delivery pipe is sequentially connected with a spray tower, a condenser and a heat exchanger, the pyrolysis gas delivery pipe is communicated with the heat exchanger to realize heat exchange of drying gas and pyrolysis gas, and the drying gas delivery pipe is respectively led to two branches of a combustion chamber and the drying furnace after the heat exchanger. The drying furnace adopts two modes of internal heating and external heating. The drying gas returns to the drying furnace again after spraying and heat exchange to realize partial circulation of the drying gas and internal heating. The high-temperature flue gas generated by the combustion chamber sequentially passes through jackets of the pyrolysis carbonization furnace and the drying furnace, so that external heating is realized. The scheme improves the drying efficiency in a drying gas internal circulation mode, is also beneficial to reducing the peculiar smell of a project site, represents a technical development trend, and increases the energy loss by a condensation and heat exchange process.
Disclosure of Invention
The invention aims to provide a method for treating municipal sludge by a semi-carbonization coupling carbonization process on the basis of the prior art, and the peculiar smell of a project site is reduced on the basis of further improving the heat treatment efficiency.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
The municipal sludge is treated by a first heat treatment section and a second heat treatment section, the second heat treatment section is heated by a jacket, and a second heat supply source is arranged in the second heat treatment section to provide a heat source for the jacket:
(1) Controlling the water content of municipal sludge in the first heat treatment section to ensure that the water content of a feeding end is more than 60 percent and the water content of a discharging end is less than 30 percent;
(2) The air inlet end of the first heat treatment section is positioned at the discharge end of the first heat treatment section, the first heat treatment section is provided with a first heat supply source, heating smoke guided out by the first heat supply source enters the first heat treatment section from the air inlet end of the first heat treatment section and is in direct contact with municipal sludge, the movement direction of the heating smoke is opposite to the advancing direction of the municipal sludge, and the temperature of the heating smoke at the air inlet end is not less than 450 ℃ so that the municipal sludge is partially carbonized at the rear section of the first heat treatment section;
(3) Municipal sludge is led out from the first heat treatment section and enters the second heat treatment section, the municipal sludge is carbonized in the second heat treatment section, the second heat treatment section generates second pyrolysis gas, and the second pyrolysis gas is led into a second heat supply source and/or a first heat supply source for recycling;
(4) The first pyrolysis gas generated by the first heat treatment section is led out through the air outlet end of the first heat treatment section, the part of the first pyrolysis gas after dry dedusting is led to the first heat supply source so that part of the first pyrolysis gas forms circulation among the air outlet end of the first heat treatment section, the first heat supply source and the air inlet end of the first heat treatment section, and the part of the first pyrolysis gas is led to the second heat supply source so that part of the first pyrolysis gas is recycled through the second heat supply source and is discharged after being treated by tail gas along with the heating flue gas of the second heat treatment section.
The semi-carbonization refers to that the material is partially carbonized through direct contact of high-temperature flue gas at the rear section of a drying section with relatively low water content.
Compared with the Chinese patent document CN214400194U, the main innovation point of the application is that:
(1) By increasing the temperature of the heating flue gas of the first heat treatment section, a partial carbonization is achieved in the first heat treatment section. On one hand, the drying efficiency of municipal sludge in the first heat treatment section is accelerated at high temperature, and on the other hand, the carbonization efficiency of the second heat treatment section is equivalently improved, and compared with the second heat treatment section which adopts a jacket indirect heating mode, the carbonization efficiency of the first heat treatment section in a direct heating mode is higher.
(2) The partial carbonization can decompose organic matters in partial drying gas, so that the viscosity of the drying gas is reduced, the influence of the viscosity of the drying gas on the dry dedusting stability is reduced, and the removal of particles or dust in the first pyrolysis gas is facilitated.
(3) The first pyrolysis gas only adopts dry dedusting, so that the water vapor content of the first pyrolysis gas is ensured, the specific heat capacity of the liquid is larger than that of the gas, and the heat storage performance of the first pyrolysis gas can be improved, thereby improving the efficiency of the first heat treatment section and reducing the equipment scale. If a spraying mode is adopted, a large amount of organic wastewater is generated, and high-temperature water vapor in the first pyrolysis gas is condensed when meeting cold, so that the heat storage performance of the first pyrolysis gas is reduced, and secondly, the organic wastewater is an important source of on-site peculiar smell of the project.
(4) The first heat treatment section is provided with a first heat supply source, so that on one hand, the heating flue gas of the first heat treatment section is guaranteed to have a high enough temperature, and on the other hand, organic components in the circulating gas can be timely removed, and the heat energy of the organic components is fully utilized.
(5) The first pyrolysis gas part is led to the second heat supply source and then is discharged along with the heating flue gas of the second heat treatment section after being treated by tail gas, which is equivalent to transferring the water vapor separated out in the drying gas spraying stage to the tail gas treatment section for separation in the scheme described in the Chinese patent document CN214400194U, and at the moment, the organic matter in the tail gas has very low content after high-temperature oxidation, so that the generation of peculiar smell can be greatly reduced. And the content of water vapor in the tail gas is higher, so that the consumption of spray water can be reduced in the subsequent tail gas treatment.
As an improvement, at least 50% of the first pyrolysis gas is led to the first heat supply source, so that enough organic matters for combustion are ensured in the first heat supply source.
As an improvement, the temperature of the first pyrolysis gas when being led out from the air outlet end of the first heat treatment section is not more than 300 ℃ so as to adapt to the requirement of the subsequent dry dedusting.
As an improvement, the temperature of the heating flue gas generated by the second heat supply source at the air inlet end of the jacket is not less than 850 ℃.
As an improvement, a bag-type dust remover is adopted in the step (4) for removing dust.
As an improvement, the dust outlet of the bag-type dust collector is communicated with the feeding end of the second heat treatment section.
As an improvement, the first pyrolysis gas in the step (4) is subjected to dust removal treatment and then exchanges heat with the tail gas of the heating flue gas led out of the jacket so as to raise the temperature of the first pyrolysis gas.
As an improvement, the first heat supply source and the second heat supply source are provided with combustion-supporting air, and the combustion-supporting air exchanges heat with the heating flue gas tail gas led out from the jacket to reduce the temperature of the heating flue gas tail gas.
As a modification, the tail gas treatment in the step (4) comprises deacidification treatment.
The invention also provides integrated equipment for treating municipal sludge by using the semi-carbonization coupling carbonization process, which comprises a first heat treatment furnace and a second heat treatment furnace, wherein the second heat treatment furnace is an indirect thermal desorption furnace heated by a jacket, the second heat treatment furnace is provided with a second heat supply source for providing a heat source for the jacket, the first heat treatment furnace is a direct thermal desorption furnace, the air inlet end of the first heat treatment furnace is positioned at the discharge end of the first heat treatment furnace, the first heat treatment furnace is provided with a first heat supply source, the first heat supply source is connected with the air inlet end of the first heat treatment furnace, the air outlet end of the first heat treatment furnace is connected with a dry dedusting device, the air outlet end of the dry dedusting device is communicated with the first heat supply source and the second heat supply source, the jacket of the second heat treatment furnace is connected with an exhaust gas treatment device, and a pyrolysis gas outlet of the second heat treatment furnace is communicated with the second heat supply source and/or the first heat supply source.
As an improvement, the dust outlet of the dry dust removal device is communicated with the feeding end of the second heat treatment furnace.
As an improvement, a first heat exchanger for raising the temperature of the first pyrolysis gas generated by the first heat treatment furnace is arranged between the jacket of the second heat treatment furnace and the tail gas treatment device.
As an improvement, the tail gas treatment device comprises a deacidification tower provided with an alkali liquid pool.
In summary, the invention introduces the concept of half carbonization, realizes partial carbonization of materials by a direct contact heating mode, improves the heat treatment efficiency, and is also beneficial to improving the dust removal efficiency of gas. And meanwhile, spray washing is replaced by dry dedusting, so that the heat energy loss is reduced, and the peculiar smell of a project site is further reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the invention;
10. The device comprises a first heat treatment furnace, 11, a first heat supply source, 12, a dry dust removal device, 20, a second heat treatment furnace, 21, a second heat supply source, 22, a tail gas treatment device, 30, a first heat exchanger, 40, a second heat exchanger and 50, and a fuel gas supply device.
Detailed Description
Example 1
As shown in FIG. 1, the integrated equipment for treating municipal sludge by using the semi-carbonization coupling carbonization process disclosed by the invention is mainly composed of a first heat treatment furnace 10 and a second heat treatment furnace 20. The first heat treatment furnace 10 is a direct thermal desorption furnace, the first heat treatment furnace 10 is provided with a first heat supply source 11, and the first heat supply source 11 is a drying hot blast furnace. The first heat supply source 11 is connected with the air inlet end of the first heat treatment furnace 10, the air inlet end of the first heat treatment furnace 10 is positioned at the discharge end of the first heat treatment furnace, and the air outlet end of the first heat treatment furnace 10 is connected with the dry dust removing device 12. The air outlet of the dry dust removal device 12 is connected to a first heat exchanger 30. The second heat treatment furnace 20 is an indirect thermal desorption furnace heated by a jacket, the second heat treatment furnace 20 is provided with a second heat supply source 21, and the second heat supply source 21 is a combustion chamber. The jacket of the second heat treatment furnace 20 is connected in sequence to the first heat exchanger 30, the second heat exchanger 40 and the exhaust gas treatment device 22. Further, the first heat treatment furnace 10 and the second heat treatment furnace 20 are provided with a gas supply device 50.
The heating flue gas led out of the first heat supply source 11 enters the first heat treatment furnace 10 from the air inlet end of the first heat treatment furnace 10 and is in direct countercurrent contact with municipal sludge. The municipal sludge has an initial water content of 75-85% at the feed end of the first heat treatment furnace 10 and a water content of 15-20% at the discharge end. The temperature of the heating flue gas at the air inlet end is 450-550 ℃ so that municipal sludge is partially carbonized at the rear section of the first heat treatment section.
Municipal sludge is partially carbonized from the first heat treatment furnace 10 and then is led into the second heat treatment furnace 20 for secondary complete carbonization. The secondary complete carbonization is performed in the second heat treatment furnace 20. The temperature of the heating flue gas generated by the second heat supply source 21 at the inlet end of the jacket is 850-950 ℃. And after the carbonization treatment is finished, discharging municipal sludge.
The first pyrolysis gas generated in the first heat treatment furnace 10 is subjected to dust fall treatment by the dry dust removing device 12. The dust removing device is a cloth bag dust remover. The temperature of the first pyrolysis gas when being led out from the gas outlet end of the first heat treatment furnace 10 is 200-230 ℃, and the water content is 60-70%. The particulate matters or dust generated in the dust removal process are transferred to the second heat treatment furnace 20 for harmless treatment. In the conventional dust removal process, as viscous organic matters exist in the first pyrolysis gas, the heat load of the flue gas is low, the temperature is easy to lower in the circulating process, the dust removal efficiency generally begins to decline after the operation starts, tar-like substances are easy to adhere to the inner walls of the first pyrolysis gas pipeline and the fan, the operation time of 1-2 weeks can be generally maintained, the efficiency of the dust remover can be maintained for a long time to be more than 95% under the same condition by adopting pyrolysis gas generated by semi-carbonization in the first heat treatment section, cleaning maintenance is not needed, and the inside of the first pyrolysis gas pipeline, the fan and the heat exchanger can be maintained for 3 months.
After the first pyrolysis gas is dedusted, heat exchange is performed between the first heat exchanger 30 and the heating flue gas tail gas in the jacket of the second heat treatment furnace 20. 70-80% of the first pyrolysis gas is distributed into the first heat supply source 11 for combustion, 20-30% of the first pyrolysis gas is distributed into the second heat supply source 21 for combustion, and water vapor is discharged.
The second pyrolysis gas generated in the second heat treatment furnace 20 is introduced into the second heat supply source 21 and is burned as fuel. The gas supplied from the gas supply device 50 is natural gas, and the amount of natural gas is adjusted to control the temperatures of the first heat supply source 11 and the second heat supply source 21.
The heat exchange is performed between the heating flue gas tail gas in the jacket of the second heat treatment furnace 20 and the first pyrolysis gas after dust removal through the first heat exchanger 30. The temperature of the tail gas of the heating flue gas before heat exchange is 750-820 ℃, the temperature of the first pyrolysis gas is 190-220 ℃, the temperature of the tail gas of the heating flue gas after heat exchange is 270-350 ℃, and the temperature of the first pyrolysis gas is 450-550 ℃. Therefore, after the heat exchange, the temperature of the first pyrolysis gas is sufficient to support the sludge to be partially carbonized in the first heat treatment furnace 10, and the first heat supply source 11 arranged in the first heat treatment furnace 10 is mainly used for removing organic components in the first pyrolysis gas and accurately regulating the temperature, so that the temperature of the heating flue gas at the air inlet end is stably kept at 450-550 ℃.
The heating flue gas tail gas continues to exchange heat with the combustion air through the second heat exchanger 40, and the combustion air after heat exchange enters the first heat supply source 11 and the second heat supply source 21 respectively. The temperature of the tail gas of the heating flue gas is 150-200 ℃ after twice heat exchange. The tail gas of the heating flue gas enters the tail gas treatment device 22 for treatment and then is discharged. The tail gas treatment device 22 comprises a deacidification tower provided with an alkali liquid pool. Because the tail gas of the heating flue gas contains more water vapor, the water in the tail gas can be condensed and recycled.
Because the organic matter component in the drying gas circulates in the system and is burnt by the first heat supply source 11 or the second heat supply source 21, the organic matter cannot escape into the environment in a gaseous or liquid state, and the peculiar smell of the project site is greatly reduced.
The system is used for a certain engineering site, municipal sludge daily treatment capacity is 60t/d, the specific parameters of materials are that the water content is 75-85%, the dry-basis organic matter content is 50-80%, and the dry-basis heat value is 2200Kcal/kg.
The residence time of municipal sludge in the first heat treatment furnace 10 is 45min, which is shortened by 20-25min compared with the residence time of a conventional drying furnace, the residence time of municipal sludge in the second heat treatment furnace 20 is 25min, which is shortened by 10-15min compared with the residence time of a conventional carbonization furnace, and the heat treatment time is shortened by about 30-40 min. The pyrolysis end product accords with the national standard, and the heat reduction rate is less than 8%.
Claims (13)
1. The method for treating municipal sludge by using the semi-carbonization coupling carbonization process is characterized in that the municipal sludge is treated by a first heat treatment section and a second heat treatment section, the second heat treatment section is heated by a jacket, the second heat treatment section is provided with a second heat supply source for providing a heat source for the jacket,
(1) Controlling the water content of municipal sludge in the first heat treatment section to ensure that the water content of a feeding end is more than 60 percent and the water content of a discharging end is less than 30 percent;
(2) The air inlet end of the first heat treatment section is positioned at the discharge end of the first heat treatment section, the first heat treatment section is provided with a first heat supply source, heating smoke guided out by the first heat supply source enters the first heat treatment section from the air inlet end of the first heat treatment section and is in direct contact with municipal sludge, the movement direction of the heating smoke is opposite to the advancing direction of the municipal sludge, and the temperature of the heating smoke at the air inlet end is not less than 450 ℃ so that the municipal sludge is partially carbonized at the rear section of the first heat treatment section;
(3) Municipal sludge is led out from the first heat treatment section and enters the second heat treatment section, the municipal sludge is carbonized in the second heat treatment section, the second heat treatment section generates second pyrolysis gas, and the second pyrolysis gas is led into a second heat supply source and/or a first heat supply source for recycling;
(4) The first pyrolysis gas generated by the first heat treatment section is led out through the air outlet end of the first heat treatment section, the part of the first pyrolysis gas after dry dedusting is led to the first heat supply source so that part of the first pyrolysis gas forms circulation among the air outlet end of the first heat treatment section, the first heat supply source and the air inlet end of the first heat treatment section, and the part of the first pyrolysis gas is led to the second heat supply source so that part of the first pyrolysis gas is recycled through the second heat supply source and is discharged after being treated by tail gas along with the heating flue gas of the second heat treatment section.
2. The method for treating municipal sludge by a semi-carbonization coupled carbonization process according to claim 1, wherein at least 50% of the first pyrolysis gas is directed to the first heat source.
3. The method for treating municipal sludge by a semi-carbonization coupling carbonization process according to claim 1, wherein the temperature of the first pyrolysis gas is not higher than 300 ℃ when the first pyrolysis gas is led out through the gas outlet end of the first heat treatment section.
4. The method for treating municipal sludge by using the semi-carbonization coupling carbonization process according to claim 1, wherein the temperature of heating flue gas generated by the second heat supply source at the inlet end of the jacket is not less than 850 ℃.
5. The method for treating municipal sludge by using the semi-carbonization coupling carbonization process according to claim 1, wherein a bag-type dust remover is adopted for dust removal in the step (4).
6. The method for treating municipal sludge by using the semi-carbonization coupling carbonization process according to claim 5, wherein a dust outlet of the bag-type dust collector is communicated with a feeding end of the second heat treatment section.
7. The method for treating municipal sludge by using the semi-carbonization coupling carbonization process according to claim 1, wherein the first pyrolysis gas in the step (4) is subjected to dust removal treatment and then exchanges heat with the tail gas of the heating flue gas led out of the jacket so as to raise the temperature of the first pyrolysis gas.
8. The method for treating municipal sludge by using the semi-carbonization coupling carbonization process according to claim 1, wherein the first heat supply source and the second heat supply source are provided with combustion air, and the combustion air exchanges heat with the heating flue gas tail gas led out of the jacket to reduce the temperature of the heating flue gas tail gas.
9. The method for treating municipal sludge by using the semi-carbonization coupling carbonization process according to claim 1, wherein the tail gas treatment in the step (4) comprises deacidification treatment.
10. The method for treating municipal sludge by using the semi-carbonization coupling carbonization process according to claim 1, wherein the integrated equipment for implementing the method comprises a first heat treatment furnace (10) and a second heat treatment furnace (20), the second heat treatment furnace (20) is an indirect thermal desorption furnace heated by a jacket, the second heat treatment furnace (20) is provided with a second heat supply source (21) for providing a heat source for the jacket, the method is characterized in that the first heat treatment furnace (10) is a direct thermal desorption furnace, the air inlet end of the first heat treatment furnace (10) is positioned at the discharge end of the first heat treatment furnace, the first heat treatment furnace (10) is provided with a first heat supply source (11), the first heat supply source (11) is connected with the air inlet end of the first heat treatment furnace (10), the air outlet end of the first heat treatment furnace (10) is connected with a dry dust collector (12), the air outlet end of the dry dust collector (12) is connected with the first heat supply source (11) and the second heat supply source (21), the jacket of the second heat treatment furnace (20) is connected with a tail gas treatment device (22), and the pyrolysis gas outlet of the second heat treatment furnace (20) is connected with the second heat supply source (21) and/or the first heat supply source (11).
11. The method for treating municipal sludge by a semi-carbonization coupling carbonization process according to claim 10, wherein the dust outlet of the dry dust removal device (12) is communicated with the feeding end of the second heat treatment furnace (20).
12. The method for treating municipal sludge by a semi-carbonization coupling carbonization process according to claim 10, wherein a first heat exchanger (30) for raising the temperature of the first pyrolysis gas generated in the first heat treatment furnace (10) is provided between the jacket of the second heat treatment furnace (20) and the tail gas treatment device (22).
13. The method for treating municipal sludge by a semi-carbonization coupled carbonization process according to claim 10, wherein the tail gas treatment device (22) comprises a deacidification tower equipped with an alkali liquid pool.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210838664.XA CN117447039B (en) | 2022-07-18 | 2022-07-18 | Method and integrated equipment for treating municipal sludge using semi-carbonization coupled carbonization process |
| PCT/CN2023/084625 WO2024016719A1 (en) | 2022-07-18 | 2023-03-29 | Method for treating municipal sludge by using semi-carbonization coupled carbonization process, and integrated apparatus |
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| CN202210838664.XA CN117447039B (en) | 2022-07-18 | 2022-07-18 | Method and integrated equipment for treating municipal sludge using semi-carbonization coupled carbonization process |
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| CN117447039A CN117447039A (en) | 2024-01-26 |
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| CN118085908B (en) * | 2024-03-01 | 2024-09-10 | 浙江润昇新能源有限公司 | Internal heating biomass steam-carbon co-production device utilizing boiler tail gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101708938A (en) * | 2009-11-06 | 2010-05-19 | 杭鹏志 | Sludge or organic garbage high-low temperature coupling themolysis method |
| CN108675588A (en) * | 2018-07-23 | 2018-10-19 | 安徽省通源环境节能股份有限公司 | Sludge high-drying charing process system |
| CN113831922A (en) * | 2021-09-06 | 2021-12-24 | 浙江宜可欧环保科技有限公司 | Heating mode adjustable pyrolysis furnace |
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| KR20130020518A (en) * | 2011-08-19 | 2013-02-27 | 박준호 | Sludge carbonizing system, and byproduct fuel extraction method |
| CN108862973B (en) * | 2018-06-22 | 2020-11-24 | 山东大学 | A device and method for pyrolyzing sludge to make charcoal based on microwave-induced directional heating technology |
| CN210764947U (en) * | 2019-08-28 | 2020-06-16 | 广东天源环境科技有限公司 | Sludge drying, carbonizing and gasifying system |
| CN110746070A (en) * | 2019-11-19 | 2020-02-04 | 江苏中顺节能科技有限公司 | Biomass gas-carbon co-production coupling sludge deep treatment system and method |
| CN211595397U (en) * | 2019-11-19 | 2020-09-29 | 江苏中顺节能科技有限公司 | Biomass gas-carbon co-production coupling sludge deep treatment system |
| CN114477709A (en) * | 2022-02-25 | 2022-05-13 | 江苏碧诺环保科技有限公司 | Heavy metal sludge carbonization system not prone to blockage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101708938A (en) * | 2009-11-06 | 2010-05-19 | 杭鹏志 | Sludge or organic garbage high-low temperature coupling themolysis method |
| CN108675588A (en) * | 2018-07-23 | 2018-10-19 | 安徽省通源环境节能股份有限公司 | Sludge high-drying charing process system |
| CN113831922A (en) * | 2021-09-06 | 2021-12-24 | 浙江宜可欧环保科技有限公司 | Heating mode adjustable pyrolysis furnace |
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| CN117447039A (en) | 2024-01-26 |
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