CN111707107A - Degreasing tail gas waste heat recycling device and method - Google Patents
Degreasing tail gas waste heat recycling device and method Download PDFInfo
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- CN111707107A CN111707107A CN202010457746.0A CN202010457746A CN111707107A CN 111707107 A CN111707107 A CN 111707107A CN 202010457746 A CN202010457746 A CN 202010457746A CN 111707107 A CN111707107 A CN 111707107A
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- 238000005238 degreasing Methods 0.000 title claims abstract description 42
- 239000007789 gas Substances 0.000 title claims abstract description 41
- 239000002918 waste heat Substances 0.000 title claims abstract description 26
- 238000004064 recycling Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000005336 cracking Methods 0.000 claims abstract description 49
- 238000001816 cooling Methods 0.000 claims abstract description 26
- 238000000197 pyrolysis Methods 0.000 claims abstract description 18
- 241000894006 Bacteria Species 0.000 claims abstract description 16
- 238000000855 fermentation Methods 0.000 claims description 30
- 230000004151 fermentation Effects 0.000 claims description 30
- 239000010806 kitchen waste Substances 0.000 claims description 12
- 238000010248 power generation Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 18
- 239000010813 municipal solid waste Substances 0.000 description 9
- 229910010293 ceramic material Inorganic materials 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000010411 cooking Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- CJNBYAVZURUTKZ-UHFFFAOYSA-N hafnium(IV) oxide Inorganic materials O=[Hf]=O CJNBYAVZURUTKZ-UHFFFAOYSA-N 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004227 thermal cracking Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
- C12M41/18—Heat exchange systems, e.g. heat jackets or outer envelopes
- C12M41/22—Heat exchange systems, e.g. heat jackets or outer envelopes in contact with the bioreactor walls
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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- C12M43/00—Combinations of bioreactors or fermenters with other apparatus
- C12M43/08—Bioreactors or fermenters combined with devices or plants for production of electricity
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P5/00—Preparation of hydrocarbons or halogenated hydrocarbons
- C12P5/02—Preparation of hydrocarbons or halogenated hydrocarbons acyclic
- C12P5/023—Methane
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Abstract
The invention discloses a degreasing tail gas waste heat recycling device and a method, which belong to the technical field of degreasing and comprise the following steps: a degreasing furnace; the induced draft fan is connected with an air outlet of the degreasing furnace through a pipeline; the high-temperature cracking furnace is connected with an air outlet of the induced draft fan through a pipeline; a constant temperature cooling box connected with the air outlet of the pyrolysis furnace through a pipeline; the first air pump and the bacteria cultivation system are respectively connected with the two air outlets of the high-temperature cracking furnace through pipelines, a second electromagnetic valve and a first electromagnetic valve are respectively arranged on the two pipelines, the second electromagnetic valve is arranged on the pipeline connecting the constant-temperature cooling box and the first air pump, and the first electromagnetic valve is arranged on the pipeline connecting the constant-temperature cooling box and the bacteria cultivation system; the heat conducting plate is connected with the air outlet of the first air pump through a pipeline; the second air pump is connected with the exhaust outlet of the heat-conducting plate through the pipeline, so that the treated tail gas and the treated waste heat can be recycled well, the energy is saved, and the practicability is high.
Description
Technical Field
The invention relates to the technical field of degreasing, in particular to a degreasing tail gas waste heat recycling device and method.
Background
The zirconia ceramics are white, yellow or gray when containing impurities, generally contain HfO2, and are not easy to separate. Pure ZrO2 has three crystalline states in total at atmospheric pressure. The production of zirconia ceramics requires the preparation of powder with high purity, good dispersion performance, superfine particles and narrow particle size distribution, the preparation methods of zirconia superfine powder are many, and the degreasing of zirconia is one of the processes.
After the zirconia ceramic material is degreased, the tail gas of the zirconia ceramic material needs to be treated, but most of the existing zirconia ceramic materials are treated in a thermal cracking mode, the tail gas is directly discharged after being subjected to high-temperature cracking, and the tail gas subjected to high-temperature cracking is well treated, but is directly discharged into the air, so that the ambient temperature is too high, and meanwhile, the tail gas cannot be well recycled, and the energy waste is caused.
Disclosure of Invention
1. Technical problem to be solved
Aiming at the problems in the prior art, the invention aims to provide a degreasing tail gas waste heat recycling device and a degreasing tail gas waste heat recycling method, which are convenient for achieving good recycling of the treated tail gas and waste heat, energy is saved, and the degreasing tail gas waste heat recycling device is high in practicability.
2. Technical scheme
In order to solve the problems, the invention adopts the following technical scheme:
the utility model provides a degrease tail gas waste heat recovery utilizes device, includes:
a degreasing furnace;
the induced draft fan is connected with an air outlet of the degreasing furnace through a pipeline;
the high-temperature cracking furnace is connected with an air outlet of the induced draft fan through a pipeline;
a constant temperature cooling box connected with the air outlet of the pyrolysis furnace through a pipeline;
the device comprises a first air pump and a bacteria cultivation system which are respectively connected with two air outlets of a high-temperature cracking furnace through pipelines, wherein a second electromagnetic valve and a first electromagnetic valve are respectively arranged on the two pipelines;
the heat conducting plate is connected with the air outlet of the first air pump through a pipeline;
the second air pump is connected with the air outlet of the heat-conducting plate through a pipeline, and the air outlet of the second air pump is connected with the air inlet of the degreasing furnace through a pipeline;
the kitchen waste fermentation system is arranged at the top of the heat conduction plate;
the power generation module electrically connected with the kitchen waste fermentation system is convenient for realize carrying out good recycle to the tail gas and the waste heat after handling, and the energy saving is strong in practicability.
The invention further comprises a pressure sensor, an alarm and a PLC controller which are arranged on the high-temperature cracking furnace, wherein the pressure sensor is arranged at the left end part of the high-temperature cracking furnace, a detection head of the pressure sensor penetrates through the high-temperature cracking furnace and extends into the high-temperature cracking furnace, the alarm is arranged at the left end part of the high-temperature cracking furnace, the alarm is positioned at the upper side of the pressure sensor, the PLC controller is arranged at the right end part of the high-temperature cracking furnace, and the pressure sensor, the alarm, the first electromagnetic valve and the second electromagnetic valve are all electrically connected to the PLC controller.
As a preferred scheme of the invention, the heat conducting plate is internally provided with a snake-shaped arrangement, an outlet at one end is communicated with an air inlet of the heat conducting plate, and an outlet at the other end is communicated with an air outlet of the heat conducting plate.
A degreasing tail gas waste heat recycling method comprises the following steps:
s1, pyrolysis: starting an induced draft fan, pumping the tail gas in the degreasing furnace into a high-temperature cracking furnace, and carrying out high-temperature cracking to prepare hot air subjected to high-temperature cracking;
s2, cooling: the hot air enters a constant-temperature cooling box for cooling to prepare cooled hot air;
s3, fermentation promotion:
(a) when the pressure in the high-temperature cracking furnace is normal, starting a second electromagnetic valve and a first air pump, sending the cooled hot air into a heat conducting plate, transferring the heat in the cooled hot air into a kitchen garbage fermentation system due to the heat transfer, increasing the fermentation speed of the kitchen garbage fermentation system, fermenting the kitchen garbage fermentation system to prepare biogas, correspondingly purifying the biogas, and conveying the biogas to a power generation module for power generation, so that the power is supplied to a degreasing tail gas waste heat recycling device by using the electric energy;
(b) when the pressure in the pyrolysis furnace is abnormal, starting a first electromagnetic valve, and conveying the cooled hot air into a bacteria cultivation system for bacteria cultivation;
s4, gas recovery circulation: and (4) after the step (S- (a), conveying the cooled hot air into the degreasing furnace under the action of a second air pump, and completing the recycling of the steps S1-S3.
As a preferable embodiment of the present invention, in step S1, the pyrolysis temperature is 800-900 ℃.
In a preferred embodiment of the present invention, in step S2, the temperature of the hot air after pyrolysis is reduced to 40 to 50 ℃ by using a constant temperature cooling box (4).
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
the scheme is convenient for realizing good recycling of the treated tail gas and the treated waste heat, saves energy and has strong practicability.
Drawings
FIG. 1 is a schematic structural diagram of a waste heat recycling device for defatted tail gas of the present invention;
fig. 2 is a schematic structural diagram of an air duct in the device for recycling waste heat of defatted tail gas according to the present invention.
The reference numbers in the figures illustrate:
the kitchen garbage fermentation system comprises a degreasing furnace 1, a draught fan 2, a high-temperature cracking furnace 3, a constant-temperature cooling box 4, a first air pump 5, a heat conducting plate 6, a kitchen garbage fermentation system 7, a second air pump 8, a power generation module 9, a pressure sensor 10, an alarm 11, a PLC (programmable logic controller) 12, a first electromagnetic valve 13, a bacteria cultivation system 14 and a second electromagnetic valve 15.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
referring to fig. 1-2, a device and a method for recycling waste heat of degreasing tail gas includes:
the degreasing furnace 1 is used for high-temperature degreasing and hot air circulation of the zirconia ceramic material, and tail gas is generated in the degreasing process;
the induced draft fan 2 is connected with an air outlet of the degreasing furnace 1 through a pipeline, and the induced draft fan 2 is used for pumping out tail gas generated in the degreasing furnace 1 and conveying the tail gas into the high-temperature cracking furnace 3;
the high-temperature cracking furnace 3 is connected with an air outlet of the draught fan 2 through a pipeline, the high-temperature cracking furnace 3 is used for realizing high-temperature cracking of tail gas, the temperature in the high-temperature cracking furnace 3 can be heated to 1000 ℃, and under the general condition, the tail gas can be subjected to good high-temperature cracking in an environment of 800 plus materials at 900 ℃, so that hot air after high-temperature cracking is obtained;
the constant temperature cooling box 4 is connected with the air outlet of the high temperature cracking furnace 3 through a pipeline, the hot air after high temperature cracking has high temperature after being discharged, the temperature is cooled by the action of the constant temperature cooling box 4, the temperature after the constant temperature cooling box 4 is cooled is about 40-50 ℃, and the temperature can be realized by the constant temperature cooling box 4 per se, which is common knowledge of technicians in the field, and therefore, the description is omitted;
the device comprises a first air pump 5 and a bacteria cultivation system 14 which are respectively connected with two air outlets of a high-temperature cracking furnace 3 through pipelines, wherein a second electromagnetic valve 15 and a first electromagnetic valve 13 are respectively arranged on the two pipelines, the second electromagnetic valve 15 is arranged on the pipeline connecting a constant-temperature cooling box 4 and the first air pump 5, the first electromagnetic valve 13 is arranged on the pipeline connecting the constant-temperature cooling box 4 and the bacteria cultivation system 14, when the pressure in the high-temperature cracking furnace 3 is normal, the second electromagnetic valve 15 and the first air pump 5 can be braked, and at the moment, the second electromagnetic valve 15 is closed; when the pressure in the pyrolysis furnace 3 is abnormal, the first electromagnetic valve 13 is braked, at the moment, the first electromagnetic valve 13 is closed, and the bacteria cultivation system 14 is used for cultivating bacteria;
the heat conducting plate 6 is connected with the air outlet of the first air pump 5 through a pipeline, and the heat conducting plate 6 has good heat conductivity;
the second air pump 8 is connected with an air outlet of the heat-conducting plate 6 through a pipeline, the air outlet of the second air pump 8 is connected with an air inlet of the degreasing furnace 1 through a pipeline, and the second air pump 8 is used for conveying hot air exhausted by the heat-conducting plate 6 into the degreasing furnace 1 to complete circulation;
the kitchen waste fermentation system 7 is fixedly arranged at the top of the heat conduction plate 6, although the heat conduction plate 6 has good heat conduction performance, heat can be lost partially at all, the cooling of hot air to 40-50 ℃ is necessary, the heat is lost due to heat transfer, and the temperature required by the fermentation of the kitchen waste fermentation system 7 is generally 20-30 ℃, so that the temperature of 20-30 ℃ can be increased due to heat loss, and the fermentation effect of the kitchen waste fermentation system 7 is promoted;
the power generation module 9 is electrically connected with the kitchen waste fermentation system 7, the kitchen waste fermentation system 7 can ferment to produce biogas, the biogas is purified and then is transmitted to the power generation module 9 to generate power, and therefore the whole device is powered, and good resource utilization can be achieved;
in order to further control the safety performance of the invention, the invention further comprises a pressure sensor 10, an alarm 11 and a PLC controller 12 which are arranged on the high-temperature cracking furnace 3, wherein the pressure sensor 10 is fixedly arranged at the left end part of the high-temperature cracking furnace 3, the detection head of the pressure sensor 10 penetrates through the high-temperature cracking furnace 3 and extends into the high-temperature cracking furnace 3, the alarm 11 is fixedly arranged at the left end part of the high-temperature cracking furnace 3, the alarm 11 is positioned at the upper side of the pressure sensor 10, the PLC controller 12 is fixedly arranged at the right end part of the high-temperature cracking furnace 3, the pressure sensor 10, the alarm 11, a first electromagnetic valve 13 and a second electromagnetic valve 15 are electrically connected to the PLC controller 12, the pressure sensor 10 is used for detecting the pressure value in the high-temperature cracking furnace 3 to obtain the detection value, a pressure safety threshold value is arranged in the PLC controller 12, when the detection value is smaller than the pressure safety threshold value, controlling the first electromagnetic valve 13 to close; when the detection value is greater than or equal to the pressure safety threshold value, the PLC 12 automatically controls the second electromagnetic valve 15 and the first air pump 5 to be closed and controls the first electromagnetic valve 13 to be opened;
further, be provided with 16 that snakelike setting in the heat-conducting plate 6, 16's one end export communicates with the air intake of heat-conducting plate 6, 16's the other end export communicates with the air exit of heat-conducting plate 6, so sets up, can increase the area of contact of hot-air and heat-conducting plate 6 to carry out large tracts of land heat transfer, thereby promote the fermentation speed of rubbish from cooking fermentation system 7.
A degreasing tail gas waste heat recycling method comprises the following steps:
s1, pyrolysis: starting an induced draft fan 2, pumping the tail gas in the degreasing furnace 1 into a high-temperature cracking furnace 3, and carrying out high-temperature cracking to prepare hot air subjected to high-temperature cracking, wherein the temperature of the high-temperature cracking is 800-;
s2, cooling: the hot air enters a constant-temperature cooling box 4 to be cooled to prepare cooled hot air, and the constant-temperature cooling box 4 is utilized to cool the hot air subjected to pyrolysis to 40-50 ℃;
s3, fermentation promotion:
(a) when the pressure in the high-temperature cracking furnace 3 is normal, the second electromagnetic valve 15 and the first air pump 5 are started, the cooled hot air is sent into the heat conducting plate 6, the heat in the cooled hot air is transferred into the kitchen garbage fermentation system 7 due to the heat transfer, the fermentation speed of the kitchen garbage fermentation system 7 is increased, the kitchen garbage fermentation system 7 is fermented to prepare biogas, the biogas is correspondingly purified and is conveyed to the power generation module 9 to generate power, and therefore the power is used for supplying power to the degreasing tail gas waste heat recycling device;
(b) when the pressure in the high-temperature cracking furnace 3 is abnormal, starting the first electromagnetic valve 13, and conveying the cooled hot air into the bacteria cultivation system 14 for bacteria cultivation;
s4, gas recovery circulation: after the step S3- (a), the cooled hot air is delivered into the degreasing furnace 1 by the second air pump 8, and the recycling of the steps S1-S3 is completed.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the equivalent replacement or change according to the technical solution and the modified concept of the present invention should be covered by the scope of the present invention.
Claims (6)
1. The utility model provides a degrease tail gas waste heat recovery utilizes device which characterized in that includes:
a degreasing furnace (1);
the draught fan (2) is connected with the air outlet of the degreasing furnace (1) through a pipeline;
a high temperature cracking furnace (3) connected with the air outlet of the induced draft fan (2) through a pipeline;
a constant temperature cooling box (4) connected with the air outlet of the high temperature cracking furnace (3) through a pipeline;
the device comprises a first air pump (5) and a bacteria cultivation system (14) which are respectively connected with two air outlets of a high-temperature cracking furnace (3) through pipelines, wherein a second electromagnetic valve (15) and a first electromagnetic valve (13) are respectively arranged on the two pipelines, the second electromagnetic valve (15) is arranged on the pipeline which is connected with a constant-temperature cooling box (4) and the first air pump (5), and the first electromagnetic valve (13) is arranged on the pipeline which is connected with the constant-temperature cooling box (4) and the bacteria cultivation system (14);
a heat conducting plate (6) connected with the air outlet of the first air pump (5) through a pipeline;
the second air pump (8) is connected with an air outlet of the heat-conducting plate (6) through a pipeline, and the air outlet of the second air pump (8) is connected with an air inlet of the degreasing furnace (1) through a pipeline;
a kitchen waste fermentation system (7) arranged at the top of the heat conduction plate (6);
and the power generation module (9) is electrically connected with the kitchen waste fermentation system (7).
2. The degreasing tail gas waste heat recycling device according to claim 1, further comprising a pressure sensor (10), an alarm (11) and a PLC (programmable logic controller) which are arranged on the pyrolysis furnace (3), wherein the pressure sensor (10) is arranged at the left end of the pyrolysis furnace (3), a detection head of the pressure sensor (10) penetrates through the pyrolysis furnace (3) and extends to the interior of the pyrolysis furnace, the alarm (11) is arranged at the left end of the pyrolysis furnace (3), the alarm (11) is arranged on the upper side of the pressure sensor (10), the PLC (12) is arranged at the right end of the pyrolysis furnace (3), and the pressure sensor (10), the alarm (11), the first electromagnetic valve (13) and the second electromagnetic valve (15) are electrically connected to the PLC (12).
3. The degreasing tail gas waste heat recycling device according to claim 1, wherein the heat conducting plate (6) is internally provided with a snake-shaped arrangement (16), an outlet at one end of the snake-shaped arrangement (16) is communicated with an air inlet of the heat conducting plate (6), and an outlet at the other end of the snake-shaped arrangement (16) is communicated with an air outlet of the heat conducting plate (6).
4. The method for recovering the waste heat of the tail gas by adopting the degreasing tail gas waste heat recovery device as claimed in any one of claims 1 to 3 is characterized by comprising the following steps:
s1, pyrolysis: starting the induced draft fan (2), pumping the tail gas in the degreasing furnace (1) into the high-temperature cracking furnace (3), and carrying out high-temperature cracking to prepare hot air subjected to high-temperature cracking;
s2, cooling: the hot air enters a constant-temperature cooling box (4) for cooling to prepare cooled hot air;
s3, fermentation promotion:
(a) when the pressure in the high-temperature cracking furnace (3) is normal, a second electromagnetic valve (15) and a first air pump (5) are started, the cooled hot air is sent into a heat conducting plate (6), the heat in the cooled hot air is transferred into a kitchen waste fermentation system (7) due to the heat transfer, the fermentation speed of the kitchen waste fermentation system (7) is increased, the kitchen waste fermentation system (7) is fermented to prepare methane, the methane is correspondingly purified and is conveyed to a power generation module (9) to generate power, and therefore the power is used for supplying power to the degreasing tail gas waste heat recycling device;
(b) when the pressure in the high-temperature cracking furnace (3) is abnormal, starting a first electromagnetic valve (13), and conveying the cooled hot air into a bacteria cultivation system (14) for bacteria cultivation;
s4, gas recovery circulation: after the step S3- (a), the cooled hot air is conveyed into the degreasing furnace (1) under the action of the second air pump (8), and the recycling of the steps S1-S3 is completed.
5. The method as claimed in claim 4, wherein the pyrolysis temperature is 800-900 ℃ in step S1.
6. The degreasing tail gas waste heat recycling method according to claim 4, wherein in step S2, the temperature of the hot air after pyrolysis is reduced to 40-50 ℃ by using a constant temperature cooling box (4).
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Application publication date: 20200925 |