CN218442322U - Waste gas recycling system - Google Patents
Waste gas recycling system Download PDFInfo
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- CN218442322U CN218442322U CN202123374414.5U CN202123374414U CN218442322U CN 218442322 U CN218442322 U CN 218442322U CN 202123374414 U CN202123374414 U CN 202123374414U CN 218442322 U CN218442322 U CN 218442322U
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Abstract
The utility model relates to a waste gas cyclic utilization's system, burn burning furnace including self-propagating pyrolysis, burn burning furnace from propagating pyrolysis is equipped with material import, dry preheating section in proper order and burns the section from propagating pyrolysis, still includes the heating chamber, the heating chamber is equipped with gas inlet and exhanst gas outlet, gas inlet with dry preheating section and burn the section from propagating pyrolysis and all communicate, gas outlet with the material import is linked together. The utility model discloses having set up the heating chamber, having returned the flue gas partly to the heating chamber heating intensification back, returning again and self-propagating pyrolysis incinerator, reduce moisture content and consume some harmful components, reduce pyrolysis incineration system's energy consumption and treatment cost, alleviateed the load of two combustion chambers, can reduce pyrolysis incinerator's total emission simultaneously.
Description
Technical Field
The utility model relates to a burn technical field, concretely relates to pyrolysis technology of wastes material.
Background
The self-propagating pyrolysis incineration means that heat automatically propagates through the heat and mass transfer process of solid materials and gas to complete the pyrolysis incineration of the oily sludge on the premise of not turning over the materials. The treatment process of flue gas purification in the prior art is as follows: the temperature of the flue gas from the self-propagating pyrolysis incinerator is 132 ℃, the temperature of the flue gas is 540 ℃ after heat exchange of a primary waste heat recoverer, and then the flue gas enters a secondary combustion chamber for high-temperature secondary combustion treatment; the smoke exhaust temperature of the secondary combustion chamber is 750 ℃, one part of high-temperature smoke exhaust returns to the drying and preheating section of the self-propagating pyrolysis incinerator for drying and preheating the oily sludge mixture, the other part of high-temperature smoke exhaust exchanges heat with the smoke of the self-propagating pyrolysis incinerator through the primary waste heat recoverer, the temperature of a smoke outlet of the secondary combustion chamber after heat exchange is 281 ℃, then the high-temperature smoke exhaust exchanges heat with air through the secondary waste heat recoverer, the temperature of the air after heat exchange is 250 ℃, the temperature of the smoke is 220 ℃, and the air after heat exchange is used as combustion air of the ignition section of the secondary combustion chamber and the self-propagating pyrolysis incinerator; flue gas through second grade waste heat recoverer loops through quench tower, active carbon injection apparatus, bag collector, active carbon adsorption tower, total fan, denitration tower, deacidification tower, defroster again, has organized up to standard through the chimney finally and discharges to the atmosphere in.
However, in the treatment process, due to the complexity of the components of the materials to be treated, the generated initial smoke components and types are diversified and have high concentration, and the secondary combustion chamber is overloaded when the smoke enters the secondary combustion chamber, and the loads of fuel, fans, systems and the like are increased. In addition, since the material to be treated contains high moisture, particularly various domestic sludge, even up to 80% or more, if it can be preheated and dried before incineration, the incineration pressure and cost can also be reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a waste gas cyclic utilization's system to solve produced initial flue gas composition complicacy among the prior art, the variety is diversified and concentration is high, can lead to the overweight problem of load of second combustion chamber after getting into the second combustion chamber.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
the utility model provides a waste gas cyclic utilization's system, includes the self-propagating pyrolysis incinerator, the self-propagating pyrolysis incinerator is equipped with material import, dry preheating section and self-propagating pyrolysis incineration section, still includes the heating chamber, the heating chamber is equipped with gas inlet and exhanst gas outlet, gas inlet with dry preheating section and self-propagating pyrolysis incineration section all communicate, gas outlet with the material import is linked together.
By adopting the technical means, the smoke inlet and the smoke outlet of the heating chamber are communicated with the drying preheating section and the self-propagating pyrolysis incineration section, and the smoke outlet is communicated with the material inlet, so that initial smoke generated in the self-propagating pyrolysis incinerator can enter the heating chamber, the heating chamber carries out high-temperature treatment on the part of smoke, the moisture content in the smoke is reduced, part of harmful ingredients are consumed, and then the part of smoke returns to the material inlet of the self-propagating pyrolysis incinerator through the smoke outlet to preheat and dry the material, on one hand, the temperature of the upper material surface of the incineration device can be effectively kept by recycling the high-temperature smoke, a heat accumulation effect is generated, the treatment temperature of the material is ensured, and the treatment effect is improved; on the other hand, the total discharge amount of the pyrolysis incineration device can be reduced.
Further, the heating chamber is communicated with a natural gas inlet, and the heating chamber is also provided with a combustion control system for controlling the flow of natural gas entering the heating chamber, the inlet flow of the flue gas inlet and the outlet flow of the flue gas outlet.
Further, the temperature in the heating chamber is 700 to 800 ℃.
Further, be equipped with first passageway between dry preheating section and the gas inlet, be equipped with the second passageway between self-propagating pyrolysis burning section and the gas inlet, first passageway and second passageway are parallelly connected, be equipped with the first pump on the first passageway, make the flue gas of dry preheating section can get into in the heating chamber, be equipped with the second pump on the second passageway, make the flue gas of self-propagating pyrolysis burning section can get into in the heating chamber.
Furthermore, a third channel is arranged between the smoke outlet and the part between the material inlet end and the drying and preheating section, and a third pump is arranged on the third channel, so that smoke can enter the self-propagating pyrolysis incinerator from the heating chamber.
Further, the flow rate of the natural gas entering the heating chamber is controlled to be 10-15Nm by the combustion control system 3 /h。
Further, the air input of the flue gas inlet is 0-10000Nm 3 /h。
Further, the gas outlet amount of the flue gas inlet is 0-10000Nm 3 /h。
The utility model has the advantages that:
the utility model discloses having set up the heating chamber, having returned the flue gas partly to the heating chamber heating intensification back, returning again and self-propagating pyrolysis incinerator, reduce moisture content and consume some harmful components, reduce pyrolysis incineration system's energy consumption and treatment cost, alleviateed the load of two combustion chambers, can reduce pyrolysis incinerator's total emission simultaneously.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1-self-propagating pyrolysis incinerator, 11-drying preheating section, 12-self-propagating pyrolysis incineration section; 13-material inlet; 2-a heating chamber; 3-a second pump; 4-a first pump; 5-a third pump; 6-natural gas inlet; 7-a combustion control system; 8-a first channel; 9-a second channel; 10-third channel.
Detailed Description
The embodiments of the present invention will be described with reference to the accompanying drawings and preferred embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure in the specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic concept of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and ratio of the components in actual implementation may be changed at will, and the layout of the components may be more complicated.
The present embodiment proposes a system for recycling exhaust gas, as shown in fig. 1, which comprises a self-propagating pyrolysis incinerator 1, wherein a material inlet 13 of the self-propagating pyrolysis incinerator 1 is provided, the material distribution is performed by a material distributor uniformly at a material distribution section of a trolley of the self-propagating pyrolysis incinerator 1, and the material distribution is performed by forward movement of the trolley after the material distribution is performed, so that the material is sequentially provided to a drying preheating section 11, an ignition section, a self-propagating pyrolysis incineration section 12 and a residue cooling section of the self-propagating pyrolysis incinerator 1.
The heating device is characterized by further comprising a heating chamber 2, wherein the heating chamber 2 is communicated with a natural gas inlet 6, natural gas can enter a heating system of the heating chamber 2 through the natural gas inlet 6, and the heating system controls the temperature in the heating chamber 2 through burning natural gas.
A first channel 8, a second channel 9 and a third channel 10 are arranged between the heating chamber 2 and the self-propagating pyrolysis incinerator 1, and the heating chamber 2 is provided with a flue gas inlet and a flue gas outlet.
One end of the first channel 8 is communicated with the drying and preheating section 11 of the self-propagating pyrolysis incinerator 1, the other end of the first channel is communicated with the flue gas inlet of the heating chamber 2, the first channel 8 is provided with a first pump 4, and the first pump 4 can pump out part of the flue gas in the drying and preheating section 11 and convey the part of the flue gas into the heating chamber 2.
One end of the second channel 9 is communicated with the self-propagating pyrolysis incineration section 12 of the self-propagating pyrolysis incinerator 1, the other end is communicated with the flue gas inlet of the heating chamber 2, the second channel 9 is provided with the second pump 3, and the second pump 3 can pump out part of flue gas in the self-propagating pyrolysis incineration section 12 and then convey the part of flue gas to the inside of the heating chamber 2.
One end of the third channel 10 is communicated with a material inlet 13 in the self-propagating pyrolysis incinerator 1, the other end is communicated with a smoke outlet of the heating chamber 2, and the third channel 10 is provided with a third pump 5 which can transfer smoke in the heating chamber 2 to an initial position where the material enters the self-propagating pyrolysis incinerator 1.
The heating chamber 2 is also provided with a combustion control system 7 for controlling the flow of natural gas entering the heating chamber 2, the air input of the flue gas entering the heating chamber 2 from the flue gas inlet and the air output of the flue gas discharged from the flue gas outlet out of the heating chamber 2.
In this embodiment, the flow rate of the natural gas into the heating chamber 2 is 10-15Nm 3 H, the air input of the flue gas inlet in the heating chamber 2 is 0-10000Nm 3 H, the gas output of the flue gas outlet in the heating chamber 2 is 0-10000Nm 3 /h。
The mode that the material adopts this device to burn includes the following step:
(1) After the pretreatment of the materials is finished, the materials are conveyed to a distributor through a feeding belt and enter a self-propagating pyrolysis incinerator 1;
(2) The preheated flue gas from the secondary combustion chamber passes through a drying and preheating section 11 of the self-propagating pyrolysis incinerator 1 to dehydrate, dry and preheat the materials to be treated, then enters a flue gas cooling oil-water collecting system to be cooled and then is subjected to gas-liquid separation, the separated low-temperature flue gas enters a self-propagating pyrolysis incineration section 12, and the noncondensable organic gas in the flue gas and oxygen in air leakage are incinerated and removed; the flue gas of the upper stage of the self-propagating pyrolysis incineration section 12 enters a flue gas cooling oil-water collecting system to be cooled and then is subjected to gas-liquid separation, the separated low-temperature flue gas enters the lower stage of the self-propagating pyrolysis incineration section 12 to be incinerated to remove non-condensable organic gas in the flue gas and oxygen in air leakage, and the classification progression of the circulating flue gas of the self-propagating pyrolysis incineration section 12 is set to be 3 to 4 according to the processing capacity; the last stage of smoke enters a residue cooling section, the residue is cooled, and then the smoke enters a smoke treatment system, wherein the ignition temperature of an ignition section is 880 to 900 ℃, the temperature of a pyrolysis incineration material layer of a self-propagating pyrolysis incineration section 12 is 900 to 1100 ℃, the thickness of the self-propagating pyrolysis incineration material layer is 500 to 600mm, and the treatment time is 50 to 70min;
(3) In the material pyrolysis incineration process, the first pump 4 and the second pump 3 pump the smoke in the drying preheating section 11 and the self-propagating pyrolysis incineration section 12 to the heating chamber 2, and the smoke is subjected to high-temperature treatment for one time, so that the water content is reduced, part of harmful ingredients are consumed, the subsequent incineration pressure and cost are reduced, the temperature in the heating chamber 2 is 700-800 ℃, the temperature of the smoke subjected to heating treatment is 500-700 ℃, and the water content is reduced by 8-10% after drying;
(4) After the treatment is finished, the smoke in the heating chamber 2 is pumped to the material inlet 13 of the self-propagating pyrolysis incinerator 1 by the third pump 5 to preheat the material.
The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model.
Claims (8)
1. A system for recycling exhaust gases, comprising a self-propagating pyrolysis incinerator (1), said self-propagating pyrolysis incinerator (1) being provided with a material inlet (13), a drying preheating section (11) and a self-propagating pyrolysis incineration section (12), characterized in that: the drying and preheating device is characterized by further comprising a heating chamber (2), wherein a flue gas inlet and a flue gas outlet are formed in the heating chamber (2), the flue gas inlet is communicated with the drying and preheating section (11) and the self-propagating pyrolysis and incineration section (12), and the flue gas outlet is communicated with the material inlet (13).
2. The exhaust gas recycling system according to claim 1, characterized in that: the heating chamber (2) is communicated with a natural gas inlet (6), and the heating chamber (2) is further provided with a combustion control system (7) for controlling the flow of natural gas entering the heating chamber (2), the gas inlet flow of a flue gas inlet and the gas outlet flow of a flue gas outlet.
3. The exhaust gas recycling system according to claim 2, characterized in that: the temperature in the heating chamber (2) is 700 to 800 ℃.
4. The exhaust gas recycling system according to claim 1, characterized in that: be equipped with first passageway (8) between dry preheating section (11) and the flue gas inlet, be equipped with second passageway (9) between self-propagating pyrolysis incineration section (12) and the flue gas inlet, first passageway (8) and second passageway (9) are parallelly connected, be equipped with first pump (4) on first passageway (8), make the flue gas of dry preheating section (11) can get into in heating chamber (2), be equipped with second pump (3) on second passageway (9), make the flue gas of self-propagating pyrolysis incineration section (12) can get into in heating chamber (2).
5. The exhaust gas recycling system according to claim 4, wherein: a third channel (10) is arranged between the flue gas outlet and the part between the material inlet end and the drying and preheating section (11), and a third pump (5) is arranged on the third channel (10), so that flue gas can enter the self-propagating pyrolysis incinerator (1) from the heating chamber (2).
6. The exhaust gas recycling system according to claim 2, characterized in that: the fuel control system (7) controls the flow of natural gas entering the heating chamber (2) to be 10-15Nm 3 /h。
7. The exhaust gas recycling system according to claim 2, characterized in that: the air input of the flue gas inlet is 0-10000Nm 3 /h。
8. The exhaust gas recycling system according to claim 2, characterized in that: the gas output of the flue gas inlet is 0-10000Nm 3 /h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123374414.5U CN218442322U (en) | 2021-12-30 | 2021-12-30 | Waste gas recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123374414.5U CN218442322U (en) | 2021-12-30 | 2021-12-30 | Waste gas recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218442322U true CN218442322U (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123374414.5U Active CN218442322U (en) | 2021-12-30 | 2021-12-30 | Waste gas recycling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218442322U (en) |
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2021
- 2021-12-30 CN CN202123374414.5U patent/CN218442322U/en active Active
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