CN212091562U - Oil sludge pyrolysis desorption equipment - Google Patents
Oil sludge pyrolysis desorption equipment Download PDFInfo
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- CN212091562U CN212091562U CN202020708634.3U CN202020708634U CN212091562U CN 212091562 U CN212091562 U CN 212091562U CN 202020708634 U CN202020708634 U CN 202020708634U CN 212091562 U CN212091562 U CN 212091562U
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- desorption
- gas pipeline
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Abstract
The utility model belongs to the technical field of the pyrolysis desorption, in particular to oil sludge pyrolysis desorption equipment. This oil sludge pyrolysis desorption equipment includes the pyrolysis desorption stove, and the pyrolysis desorption stove is connected with desorption gas pipeline and tail gas pipeline, tail gas pipeline intercommunication spray column, be provided with the sleeve pipe on the desorption gas pipeline, sheathed tube both ends make flue gas tail gas can heat desorption gas pipeline with tail gas pipeline intercommunication, the last heat exchanger that is provided with of tail gas pipeline, the heating flue gas is provided by the combustion chamber, and the combustion-supporting wind of combustion chamber preheats through the heat exchanger. The utility model can keep the desorption trachea smooth.
Description
Technical Field
The utility model belongs to the technical field of the pyrolysis desorption, in particular to oil sludge pyrolysis desorption equipment.
Background
The pyrolysis desorption technology is a new oily sludge treatment technology and is widely used for treating oily sludge. In the prior art, heating flue gas is generally used for providing a heat source for the pyrolysis desorption furnace, oil-containing desorption gas is led out from the pyrolysis desorption furnace and then enters a desorption gas pipeline, non-condensable gas is guided into a combustion chamber for high-temperature harmless treatment after being sprayed, washed and cooled, and the non-condensable gas after high-temperature treatment becomes a part of high-temperature heating flue gas. The heating flue gas is led out from the pyrolysis desorption furnace to become flue gas tail gas and enters a tail gas pipeline, and the tail gas pipeline is communicated with the spray tower. In the prior art, the inlet temperature of the heated flue gas entering the pyrolysis desorption furnace is generally about 700-800 ℃, and the outlet temperature of the flue gas tail gas discharged from the pyrolysis desorption furnace is generally about 300-500 ℃. When the flue gas contains a precursor of dioxin, the dioxin is very easy to be synthesized at the temperature of 230-500 ℃, so that the tail gas of the flue gas can be discharged into the atmospheric environment only through a combustion step. On the other hand, the temperature of the oil-containing desorption gas discharged from the pyrolysis desorption furnace is about 300 ℃, and the oil content is easy to condense due to the heat dissipation and temperature reduction of the desorption gas pipeline, so that the pipeline is seriously blocked. According to practical experience of an applicant, the desorption gas pipeline can be seriously blocked after being normally used for one week, so that a thermal insulation material is generally required to be wrapped on the desorption gas pipeline to prevent the oil-containing desorption gas from being excessively cooled.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the oil sludge pyrolysis desorption equipment which can keep the desorption gas pipeline smooth.
In order to achieve the above purpose, the technical solution of the present invention is as follows:
oil sludge pyrolysis desorption equipment, including pyrolysis desorption stove, pyrolysis desorption stove is connected with desorption gas pipeline and tail gas pipeline, tail gas pipeline intercommunication spray column, be provided with the sleeve pipe on the desorption gas pipeline, the sheathed tube both ends make flue gas tail gas can heat desorption gas pipeline with tail gas pipeline intercommunication.
As an improvement, a heat exchanger is arranged on the tail gas pipeline, heating smoke is provided by a combustion chamber, and combustion-supporting air of the combustion chamber is preheated by the heat exchanger.
As an improvement, the tail gas pipeline is connected with a back mixing flue, the heating flue gas is provided by the combustion chamber, and the back mixing flue is used for guiding partial flue gas tail gas to the combustion chamber.
The utility model has the advantages that: the inlet temperature of the heated flue gas is increased, and the outlet temperature of the flue gas tail gas is improved. The treatment efficiency of the pyrolysis desorption furnace can be improved after the inlet air temperature of the heating flue gas is increased, and meanwhile, the temperature of the oil-containing desorption gas can also be increased, so that the probability of condensation of the oil-containing desorption gas in a desorption gas pipeline can be reduced. The temperature of giving vent to anger when leading out from pyrolysis desorption stove with tail gas from flue gas controls more than 600 ℃ to heating desorption gas pipeline with tail gas from flue gas, can further prevent that oil-containing desorption gas from taking place the condensation at desorption gas pipeline. Because the amount of the oil-containing desorption gas is relatively less than that of the tail gas of the flue gas, the reduction amplitude of the temperature is within 50 ℃ after the tail gas of the flue gas heats the desorption gas pipeline, and then the tail gas of the flue gas is sprayed and rapidly cooled to be below 200 ℃, so that the retention time of the tail gas of the flue gas in the temperature range in which dioxin is easily resynthesized is extremely short, the generation probability of the dioxin is greatly reduced, and the combustion step in the tail gas treatment process can be omitted. Adsorption and combustion are conventional combinations in flue gas tail gas treatment processes. If dioxin is generated, the dioxin can be adsorbed only by activated carbon.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a combustion chamber; 2. a thermal desorption furnace; 3. an exhaust gas pipeline; 4. a desorption gas pipeline; 5. a sleeve; 6. a spray tower; 7. a heat exchanger; 8. a back mixing flue.
Detailed Description
Example 1
As shown in fig. 1, oil sludge pyrolysis desorption equipment, including combustion chamber 1, pyrolysis desorption stove 2, the heating flue gas is provided by combustion chamber 1, and pyrolysis desorption stove 2 is connected with desorption gas pipeline 4 and tail gas pipeline 3, is provided with sleeve pipe 5 on desorption gas pipeline 4, and sleeve pipe 5's both ends and tail gas pipeline 3 intercommunication make flue gas tail gas can heat desorption gas pipeline 4. The tail gas pipeline 3 is provided with a heat exchanger 7, combustion-supporting air of the combustion chamber 1 is preheated by the heat exchanger 7, and the running route of the combustion-supporting air is indicated by a dotted line in the figure. The exhaust gas duct 3 is connected with a back-mixing flue 8, and the running route of the back-mixing flue 8 is shown by a thin solid line in the figure. The back mixing flue 8 is used for guiding part of the flue gas tail gas to the combustion chamber 1, and the rest flue gas tail gas is directly guided to the spray tower 6 through the tail gas pipeline 3 for spray quenching.
According to the method for pyrolyzing and desorbing the oil sludge, the combustion chamber 1 provides heating flue gas, the temperature of the high-temperature section of the combustion chamber 1 is kept above 1100 ℃, the heating flue gas is used for providing a heat source for the pyrolysis and desorption furnace 2, and the inlet temperature of the heating flue gas entering the pyrolysis and desorption furnace 2 is controlled to be above 850 ℃. The heating flue gas is led out from the pyrolysis desorption furnace 2 to become flue gas tail gas and enters the tail gas pipeline 3, and the outlet temperature of the flue gas tail gas when being led out from the pyrolysis desorption furnace 2 is controlled to be more than 600 ℃. Preferably, the inlet air temperature can be kept between 900 and 950 ℃, the outlet air temperature can be kept between 650 and 700 ℃, and the treatment capacity of the pyrolysis desorption furnace 2 can be improved by 20 to 30 percent compared with the conventional inlet air temperature.
The oil-containing desorption gas is led out from the pyrolysis desorption furnace 2 and then enters a desorption gas pipeline 4, and the temperature of the oil-containing desorption gas led out from the pyrolysis desorption furnace 2 is 300-400 ℃. Set up sleeve pipe 5 outside desorption gas pipeline 4, the both ends of sleeve pipe 5 and 3 intercommunications of tail gas pipeline make flue gas tail gas can heat desorption gas pipeline 4, make the temperature of oily desorption gas in desorption gas pipeline 4 control at 400 + 450 ℃ all the time, the oil branch can not take place the condensation in desorption gas pipeline, desorption gas pipeline 4 is difficult for taking place to block up.
The tail gas pipeline 3 is communicated with a spray tower 6, and a semi-dry type quench tower is adopted to carry out spray quenching on the flue gas tail gas, so that the temperature of the flue gas tail gas is reduced to below 200 ℃ within 1 s.
The tail gas pipeline 3 is provided with a heat exchanger 7. The combustion air of the combustion chamber 1 is preheated by the heat exchanger 7. Keeping the temperature of the outlet air at 650-700 ℃, reducing the temperature of the tail gas of the flue gas to about 550 ℃ after heat exchange by the heat exchanger 7, and preheating the temperature of the combustion-supporting air to 200-250 ℃. The retention time of the heating flue gas in the pyrolysis desorption furnace 2 can be controlled by adjusting the air volume of the heating flue gas, so that the outlet temperature of the flue gas tail gas when the flue gas tail gas is led out from the pyrolysis desorption furnace 2 is controlled.
The tail gas pipeline 3 is connected with a back mixing flue 8, the back mixing flue 8 is used for guiding partial flue gas tail gas to the combustion chamber 1, the back mixing proportion of the flue gas tail gas is controlled to be 40-50% of the total amount of the flue gas tail gas, and 50-60% of the flue gas tail gas enters the spray tower 6 and subsequent flue gas treatment equipment. Subsequent flue gas treatment equipment generally does not need to be provided with a combustion device.
Claims (3)
1. Oil sludge pyrolysis desorption equipment, including pyrolysis desorption stove, pyrolysis desorption stove is connected with desorption gas pipeline and tail gas pipeline, and tail gas pipeline intercommunication spray column, its characterized in that: the desorption gas pipeline is provided with a sleeve, and the two ends of the sleeve are communicated with the tail gas pipeline to heat the desorption gas pipeline.
2. The oil sludge pyrolysis desorption equipment of claim 1, characterized in that: the tail gas pipeline is provided with a heat exchanger, heating smoke is provided by a combustion chamber, and combustion-supporting air of the combustion chamber is preheated by the heat exchanger.
3. The oil sludge pyrolysis desorption equipment of claim 1, characterized in that: the tail gas pipeline is connected with a back mixing flue, heating flue gas is provided by the combustion chamber, and the back mixing flue is used for guiding partial flue gas tail gas to the combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020708634.3U CN212091562U (en) | 2020-05-01 | 2020-05-01 | Oil sludge pyrolysis desorption equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020708634.3U CN212091562U (en) | 2020-05-01 | 2020-05-01 | Oil sludge pyrolysis desorption equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212091562U true CN212091562U (en) | 2020-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020708634.3U Active CN212091562U (en) | 2020-05-01 | 2020-05-01 | Oil sludge pyrolysis desorption equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212091562U (en) |
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2020
- 2020-05-01 CN CN202020708634.3U patent/CN212091562U/en active Active
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