CN114588741B - Waste gas treatment system for biodiesel production from swill-cooked dirty oil - Google Patents
Waste gas treatment system for biodiesel production from swill-cooked dirty oil Download PDFInfo
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- CN114588741B CN114588741B CN202210247444.XA CN202210247444A CN114588741B CN 114588741 B CN114588741 B CN 114588741B CN 202210247444 A CN202210247444 A CN 202210247444A CN 114588741 B CN114588741 B CN 114588741B
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- 239000002912 waste gas Substances 0.000 title claims abstract description 84
- 239000003225 biodiesel Substances 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 116
- 238000001179 sorption measurement Methods 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 238000005406 washing Methods 0.000 claims abstract description 36
- 238000007084 catalytic combustion reaction Methods 0.000 claims abstract description 35
- 239000007789 gas Substances 0.000 claims description 55
- 238000003795 desorption Methods 0.000 claims description 11
- 238000009833 condensation Methods 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims description 9
- 239000000567 combustion gas Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims 1
- 238000003912 environmental pollution Methods 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 13
- 235000019198 oils Nutrition 0.000 description 13
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 239000003208 petroleum Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 239000010775 animal oil Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008162 cooking oil Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000019387 fatty acid methyl ester Nutrition 0.000 description 1
- 239000010685 fatty oil Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Classifications
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
-
- 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
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0012—In-line filters
-
- 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
- B01D53/002—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 by condensation
-
- 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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- 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
- B01D53/14—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 by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a waste gas treatment system for biodiesel production by swill-cooked dirty oil, which solves the technical problems of great harm and high treatment difficulty of the existing waste gas for biodiesel production by swill-cooked dirty oil. The invention comprises a vacuum waste gas conveying pipe, a non-vacuum waste gas conveying pipe, a first condenser, a first filter, a first catalytic combustion device, a mixer, a water washing tank, a second filter, a first activated carbon adsorption tower and a first exhaust pipe. The invention adopts the waste gas treatment system, can efficiently and rapidly treat the vacuum waste gas and the non-vacuum waste gas and then directly discharge the treated waste gas, reduces environmental pollution and realizes the green development of biodiesel production.
Description
Technical Field
The invention belongs to the technical field of biodiesel production, and particularly relates to a waste gas treatment system for biodiesel production from swill-cooked dirty oil.
Background
Biodiesel (Biodiesel) is also called fatty acid methyl ester, which is obtained by transesterification of plant fruits, seeds, plant duct milk or animal fatty oil, waste edible oil, etc. with alcohols (methanol, ethanol). The performance of the biodiesel is similar to that of petroleum diesel, and the biodiesel can be directly mixed with the petroleum diesel or mixed with the petroleum diesel in any proportion for combustion of an internal combustion engine, so that compared with petroleum diesel, the biodiesel is cleaner. The biodiesel with 20 percent is added into the petrochemical diesel, so that the emission of 50 percent of carbon dioxide and 70 percent of sulfur dioxide can be reduced, and the air toxicity can be reduced by 90 percent.
At present, the main raw materials for domestic production of biodiesel are waste animal and vegetable oil, including 'lower corner oil' produced by the oil industry and waste cooking oil, namely 'swill-cooked dirty oil'. The biodiesel produced by swill-cooked dirty oil can produce a large amount of waste gas, including 95% of non-vacuum waste gas and 5% of vacuum waste gas, wherein the non-vacuum waste gas has low treatment difficulty, and the vacuum waste gas contains sulfur, phosphorus, aldehyde, ketone and the like, and has strong pungent smell, large malodor and large treatment difficulty. For vacuum waste gas, no related treatment system is used for reducing the harm of the waste gas, so that the waste gas has great pollution to the environment and great influence to nearby households, and the waste gas becomes a great difficulty for limiting the green development of biodiesel.
Therefore, the invention provides a waste gas treatment system for biodiesel production by swill-cooked dirty oil, so as to treat waste gas efficiently and rapidly, reduce environmental pollution, and become a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to solve the technical problems that: the waste gas treatment system for biodiesel production by using swill-cooked dirty oil solves the technical problems of large harm and high treatment difficulty of the existing waste gas for biodiesel production by using swill-cooked dirty oil.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
A waste gas treatment system for biodiesel production by swill-cooked dirty oil comprises a vacuum waste gas conveying pipe for conveying vacuum waste gas, a non-vacuum waste gas conveying pipe for conveying non-vacuum waste gas, a first condenser connected with the vacuum waste gas conveying pipe and used for cooling the vacuum waste gas, a first filter connected with the first condenser and used for dewatering the vacuum waste gas, a first catalytic combustion device connected with the first filter and used for burning the vacuum waste gas, a mixer connected with the first catalytic combustion device and the non-vacuum waste gas conveying pipe respectively, a water washing tank connected with the mixer, a second filter connected with the water washing tank and used for dewatering mixed gas, a first activated carbon adsorption tower connected with the second filter, and a first exhaust pipe connected with the first activated carbon adsorption tower.
Further, the first activated carbon adsorption tower is connected with a desorption gas treatment device, and the desorption gas treatment device comprises a second condenser connected with the first activated carbon adsorption tower, a third filter connected with the second condenser, a second catalytic combustion device connected with the third filter, and a third exhaust pipe connected with the second catalytic combustion device.
Further, a first conveying pipe is connected between the first activated carbon adsorption tower and the second condenser, a first valve and a first pump are arranged on the first conveying pipe, and a first exhaust valve is arranged on the first exhaust pipe;
a third conveying pipe is connected between the second condenser and the third filter, a fourth conveying pipe is connected between the third filter and the second catalytic combustion device, and a third exhaust valve is arranged on the third exhaust pipe.
Further, the device also comprises a second activated carbon adsorption tower which is connected between the second filter and the second condenser and is connected with the first activated carbon adsorption tower in parallel, the second activated carbon adsorption tower is connected with a second exhaust pipe, and a second exhaust valve is arranged on the second exhaust pipe;
The second activated carbon adsorption tower and the second condenser are connected with a second conveying pipe, and a second valve and a second pump are arranged on the second conveying pipe.
Further, the outlet of the second filter is connected with a fifth conveying pipe, and a first branch pipeline connected with the first activated carbon adsorption tower and a second branch pipeline connected with the second activated carbon adsorption tower are connected from the fifth conveying pipe;
the first branch pipeline is provided with a fifth valve, and the second branch pipeline is provided with a sixth valve.
Further, a gas pipe for vacuum waste gas to enter the first filter from the first condenser and a circulating condensing pipe for secondary condensation in the first condenser from the first filter are respectively connected between the first condenser and the first filter, and a third valve and a circulating pump are arranged on the circulating condensing pipe; the first filter and the first catalytic combustion device are connected by a pipe, and a fifth pump is provided on the pipe.
Further, a combustion gas output pipe is connected between the first catalytic combustion device and the mixer, and a fourth valve is arranged on the combustion gas output pipe.
Further, a water washing input pipe is connected between the mixer and the bottom of the water washing tank, and a water washing output pipe is connected between the top of the water washing tank and the second filter.
Further, the water washing pool is respectively connected with a water inlet pipe for water inlet and a water outlet pipe for water outlet, the water inlet pipe is provided with a water inlet valve, and the water outlet pipe is provided with a water outlet valve.
Further, a third pump is arranged on the vacuum waste gas conveying pipe, and a fourth pump is arranged on the non-vacuum waste gas conveying pipe.
Compared with the prior art, the invention has the following beneficial effects:
the waste gas treatment system is simple in structure, scientific and reasonable in design and convenient to use, solves the technical problems of high harm and high treatment difficulty of the existing waste gas generated in biodiesel production by swill-cooked dirty oil, can be used for efficiently and quickly treating the waste gas and then directly discharging, reduces environmental pollution, and realizes the green development of biodiesel production.
The invention comprises a vacuum waste gas conveying pipe, a non-vacuum waste gas conveying pipe, a first condenser, a first filter, a first catalytic combustion device, a mixer, a water washing tank, a second filter and a first activated carbon adsorption tower. A large amount of vacuum waste gas and non-vacuum waste gas are generated in the biodiesel production process, wherein the vacuum waste gas needs to be pretreated, is cooled by a first condenser and dehydrated by a first filter in sequence, and then enters a first catalytic combustion device to burn and consume a large amount of harmful combustible gas; and then fully and uniformly mixing the combustion gas pretreated by the vacuum waste gas with the non-vacuum waste gas in a mixer, and sequentially washing the mixture by a water washing tank, dehydrating the mixture by a second filter and adsorbing the mixture by a first activated carbon adsorption tower to obtain the gas reaching the standard, and discharging the gas. The invention can carry out comprehensive and specific treatment according to gases with different attributes, finally meets the emission standard, greatly reduces the environmental pollution caused by biodiesel production, and carries out effective and critical reform on biodiesel waste gas treatment.
The invention provides a desorption gas treatment device for realizing zero pollution of exhaust gas, which is used for secondarily treating desorption gas in a first activated carbon adsorption tower, and comprises a second condenser, a third filter and a second catalytic combustion device. Because the gas absorbed by the activated carbon in the first activated carbon adsorption tower contains gas components harmful to the environment, the gas components are desorbed and volatilized, so that the desorbed gas is cooled by the second condenser and dehydrated by the third filter and then enters the second catalytic combustion device to be combusted, and finally, zero residue of the harmful gas and zero emission of the harmful gas are realized, thereby achieving the real environment protection.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
FIG. 2 shows the present invention water washing pool structure diagram.
Wherein, the names corresponding to the reference numerals are:
1-circulation pump, 2-fifth pump, 3-first condenser, 4-first filter, 5-first catalytic combustion device, 6-mixer, 7-water-washing tank, 8-second filter, 9-first activated carbon adsorption tower, 10-second activated carbon adsorption tower, 11-first exhaust pipe, 12-second exhaust pipe, 13-second condenser, 14-third filter, 15-second catalytic combustion device, 16-first delivery pipe, 17-first valve, 18-first pump, 19-second delivery pipe, 20-second valve, 21-second pump, 22-third delivery pipe, 23-fourth delivery pipe, 24-third exhaust pipe, 25-third exhaust valve, 26-vacuum exhaust gas delivery pipe, 27-third pump, 28-gas delivery pipe, 29-circulation condensing pipe, 30-third valve, 31-non-vacuum exhaust gas delivery pipe, 32-fourth pump, 33-combustion gas delivery pipe, 34-fourth valve, 35-water-washing delivery pipe, 36-water delivery pipe, 37-second delivery pipe, 39-third delivery pipe, 23-fourth delivery pipe, 24-third exhaust valve, 25-third exhaust valve, 26-vacuum exhaust gas delivery pipe, 27-third pump, 28-gas delivery pipe, 29-circulation condensing pipe, 30-third valve, 31-third delivery pipe, 37-water-fourth valve, 36-water-washing delivery pipe, 37-water-second delivery pipe, 37-second exhaust valve, 37-third valve, 43-fifth delivery pipe, 45-exhaust valve, 46-third exhaust valve, 46-exhaust valve, fifth delivery pipe, and fifth delivery pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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 explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; of course, it may be mechanically or electrically connected; in addition, the connection may be direct, indirect via an intermediate medium, or communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1-2, the waste gas treatment system for biodiesel production by swill-cooked dirty oil provided by the invention has the advantages of simple structure, scientific and reasonable design and convenience in use, solves the technical problems of large harm and high treatment difficulty of the waste gas produced by biodiesel production by swill-cooked dirty oil, can be used for directly discharging the waste gas after being treated efficiently and rapidly, reduces environmental pollution, and realizes the green development of biodiesel production.
The invention comprises a vacuum exhaust gas conveying pipe 26 for conveying vacuum exhaust gas, a non-vacuum exhaust gas conveying pipe 31 for conveying non-vacuum exhaust gas, a first condenser 3 connected with the vacuum exhaust gas conveying pipe 26 and used for cooling the vacuum exhaust gas, a first filter 4 connected with the first condenser 3 and used for dehydrating the vacuum exhaust gas, a first catalytic combustion device 5 connected with the first filter 4 and used for combusting the vacuum exhaust gas, a mixer 6 respectively connected with the first catalytic combustion device 5 and the non-vacuum exhaust gas conveying pipe 31, a water washing tank 7 connected with the mixer 6, a second filter 8 connected with the water washing tank 7 and used for dehydrating mixed gas, a first activated carbon adsorption tower 9 connected with the second filter 8, and a first exhaust pipe 11 connected with the first activated carbon adsorption tower 9.
In the production process of biodiesel, a large amount of vacuum waste gas and non-vacuum waste gas which are harmful to the environment are generated, and the waste gas is required to be subjected to harmless treatment to be discharged into the atmosphere. Wherein, the vacuum waste gas needs additional pretreatment, is cooled to below 10 ℃ through a first condenser 3 in sequence, is dehydrated through a first filter 4, and enters a first catalytic combustion device 5 with the combustion temperature less than 500 ℃ to consume a large amount of harmful combustible gas; and then fully and uniformly mixing the combustion gas pretreated by the vacuum waste gas with the non-vacuum waste gas in the mixer 6, and sequentially washing out water-soluble harmful substances by a water washing tank 7, dehydrating by a second filter 8, and carrying out physical adsorption by a first activated carbon adsorption tower 9 to obtain the gas reaching the standard, and discharging. The invention can carry out comprehensive and specific treatment according to gases with different attributes, finally meets the emission standard, greatly reduces the environmental pollution caused by biodiesel production, and carries out effective and critical reform on biodiesel waste gas treatment.
The invention also provides an air suction treatment device for secondary treatment of the air suction reburning of the first activated carbon adsorption tower 9. The desorption gas treatment device includes a second condenser 13 connected to the first activated carbon adsorption tower 9, a third filter 14 connected to the second condenser 13, a second catalytic combustion device 15 connected to the third filter 14, and a third exhaust pipe 24 connected to the second catalytic combustion device 15. Because the gas absorbed by the activated carbon in the first activated carbon adsorption tower 9 contains gas components harmful to the environment, the gas components are desorbed and volatilized, so that the desorbed gas is cooled by the second condenser 13 and dehydrated by the third filter 14 and then enters the second catalytic combustion device 15 to be combusted, and finally, zero residue of the harmful gas and zero emission of the harmful gas are realized, thereby achieving the real environment protection.
The present invention includes a second activated carbon adsorption column 10 connected between the second filter 8 and the second condenser 13 and in parallel with the first activated carbon adsorption column 9. The first activated carbon adsorption tower 9 is connected with a first exhaust pipe 11, and a first exhaust valve 41 is arranged on the first exhaust pipe 11; the second activated carbon adsorption tower 10 is connected with a second exhaust pipe 12, and a second exhaust valve 42 is arranged on the second exhaust pipe 12. The outlet of the second filter 8 is connected with a fifth conveying pipe 43, and a first branch pipe 44 connected with the first activated carbon adsorption tower 9 and a second branch pipe 45 connected with the second activated carbon adsorption tower 10 are connected from the fifth conveying pipe 43; the first branch pipe 44 is provided with a fifth valve 46, the second branch pipe 45 is provided with a sixth valve 47, and the fifth valve 46 and the sixth valve 47 are used for controlling the alternating operation of the first activated carbon adsorption tower 9 and the second activated carbon adsorption tower 10. When the first activated carbon adsorption tower 9 stops working after adsorption, the second activated carbon adsorption tower 10 takes over the work, the first activated carbon adsorption tower 9 carries out desorption of the adsorbed gas, and the desorbed gas enters a desorption gas treatment device to complete desorption gas combustion. Similarly, the second activated carbon adsorption tower 10 stops working, and the first activated carbon adsorption tower 9 takes over the adsorption work. The number of the activated carbon adsorption towers can be reasonably designed according to the actual gas treatment capacity, and the number of the activated carbon adsorption towers for adsorption and desorption can be also reasonably set.
A first conveying pipe 16 is connected between a first activated carbon adsorption tower 9 and a second condenser 13, and a first valve 17 and a first pump 18 are arranged on the first conveying pipe 16; the second activated carbon adsorption tower 10 and the second condenser 13 are connected with a second conveying pipe 19, and a second valve 20 and a second pump 21 are arranged on the second conveying pipe 19; a third conveying pipe 22 is connected between the second condenser 13 and the third filter 14, a fourth conveying pipe 23 is connected between the third filter 14 and the second catalytic combustion device 15, the second catalytic combustion device 15 is connected with a third exhaust pipe 24, and a third exhaust valve 25 is arranged on the third exhaust pipe 24.
The third pump 27 is arranged on the vacuum waste gas conveying pipe 26, the fourth pump 32 is arranged on the non-vacuum waste gas conveying pipe 31, and the third pump 27 and the fourth pump 32 can respectively pump the vacuum waste gas and the non-vacuum waste gas generated in the biodiesel production system into the system for harmless treatment.
In the invention, a gas pipe 28 for vacuum waste gas to enter the first filter 4 from the first condenser 3 and a circulating condensation pipe 29 for secondary condensation in the first condenser 3 from the first filter 4 are respectively connected between the first condenser 3 and the first filter 4, and a third valve 30 and a circulating pump 1 are arranged on the circulating condensation pipe 29. Since the vacuum waste gas catalytic combustion needs to remove the moisture to the greatest extent, the circulating condensation pipe 29 between the first filter 4 and the first condenser 3 can realize condensation dehydration in a plurality of times, so that the influence of the moisture on the catalytic combustion is avoided.
A water washing input pipe 35 is connected between the mixer 6 and the bottom of the water washing tank 7, a water washing output pipe 36 is connected between the top of the water washing tank 7 and the second filter 8, and the mixed gas passes through the water washing tank 7 from bottom to top, so that the mixed gas is ensured to be fully contacted with water, and the top of the water washing tank 7 is preferably in a cone structure, thereby facilitating the concentrated discharge of the water washing gas. The water washing tank 7 is respectively connected with a water inlet pipe 37 for water inlet and a water outlet pipe 38 for water outlet, the water inlet pipe 37 is provided with a water inlet valve 39, the water outlet pipe 38 is provided with a water outlet valve 40, and when a certain water washing amount is finished, water in the water washing tank 7 needs to be replaced.
The first condenser 3 and the second condenser 13 of the present invention are water coolers, the first pump 18, the second pump 21, the third pump 27 and the fourth pump 29 are membrane pumps, the first filter 4, the second filter 8 and the third filter 14 are air filters, and the first catalytic combustion device 5, the second catalytic combustion device 15, the mixer 6, the first activated carbon adsorption tower 9 and the second activated carbon adsorption tower 10 are all known devices, and can be directly purchased in the market, and the structure and the control principle thereof are all known technologies, so the structures, circuits and the control principles of the water coolers, the membrane pumps, the air filters, the first catalytic combustion device 5, the second catalytic combustion device 15, the mixer 6, the first activated carbon adsorption tower 9 and the second activated carbon adsorption tower 10 are not described herein.
Finally, it should be noted that: the above embodiments are merely preferred embodiments of the present invention for illustrating the technical solution of the present invention, but not limiting the scope of the present invention; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions; that is, even though the main design concept and spirit of the present invention is modified or finished in an insubstantial manner, the technical problem solved by the present invention is still consistent with the present invention, and all the technical problems are included in the protection scope of the present invention; in addition, the technical scheme of the invention is directly or indirectly applied to other related technical fields, and the technical scheme is included in the scope of the invention.
Claims (8)
1. A waste gas treatment system for biodiesel production by swill-cooked dirty oil is characterized in that: comprises a vacuum waste gas conveying pipe (26) for conveying vacuum waste gas, a non-vacuum waste gas conveying pipe (31) for conveying non-vacuum waste gas, a first condenser (3) connected with the vacuum waste gas conveying pipe (26) and used for cooling the vacuum waste gas, a first filter (4) connected with the first condenser (3) and used for dehydrating the vacuum waste gas, a first catalytic combustion device (5) connected with the first filter (4) and used for combusting the vacuum waste gas, a mixer (6) respectively connected with the first catalytic combustion device (5) and the non-vacuum waste gas conveying pipe (31), a water washing tank (7) connected with the mixer (6), a second filter (8) connected with the water washing tank (7) and used for dehydrating mixed gas, a first activated carbon adsorption tower (9) connected with the second filter (8), and a first exhaust pipe (11) connected with the first activated carbon adsorption tower (9);
the first activated carbon adsorption tower (9) is connected with a desorption gas treatment device, and the desorption gas treatment device comprises a second condenser (13) connected with the first activated carbon adsorption tower (9), a third filter (14) connected with the second condenser (13), a second catalytic combustion device (15) connected with the third filter (14) and a third exhaust pipe (24) connected with the second catalytic combustion device (15);
a combustion gas output pipe (33) is connected between the first catalytic combustion device (5) and the mixer (6), and a fourth valve (34) is arranged on the combustion gas output pipe (33).
2. The waste gas treatment system for biodiesel production by swill-cooked dirty oil according to claim 1, wherein: a first conveying pipe (16) is connected between the first activated carbon adsorption tower (9) and the second condenser (13), a first valve (17) and a first pump (18) are arranged on the first conveying pipe (16), and a first exhaust valve (41) is arranged on the first exhaust pipe (11);
A third conveying pipe (22) is connected between the second condenser (13) and the third filter (14), a fourth conveying pipe (23) is connected between the third filter (14) and the second catalytic combustion device (15), and a third exhaust valve (25) is arranged on the third exhaust pipe (24).
3. The waste gas treatment system for biodiesel production by swill-cooked dirty oil according to claim 1, wherein: the device further comprises a second activated carbon adsorption tower (10) which is connected between the second filter (8) and the second condenser (13) and is connected with the first activated carbon adsorption tower (9) in parallel, the second activated carbon adsorption tower (10) is connected with a second exhaust pipe (12), and a second exhaust valve (42) is arranged on the second exhaust pipe (12);
the second activated carbon adsorption tower (10) and the second condenser (13) are connected with a second conveying pipe (19), and a second valve (20) and a second pump (21) are arranged on the second conveying pipe (19).
4. A waste gas treatment system for biodiesel production by swill-cooked dirty oil according to claim 3, wherein: the outlet of the second filter (8) is connected with a fifth conveying pipe (43), and a first branch pipeline (44) connected with the first activated carbon adsorption tower (9) and a second branch pipeline (45) connected with the second activated carbon adsorption tower (10) are connected from the fifth conveying pipe (43);
A fifth valve (46) is arranged on the first branch pipeline (44), and a sixth valve (47) is arranged on the second branch pipeline (45).
5. The waste gas treatment system for biodiesel production by swill-cooked dirty oil according to claim 1, wherein: a gas pipe (28) for allowing vacuum waste gas to enter the first filter (4) from the first condenser (3) and a circulating condensation pipe (29) for refluxing from the first filter (4) to secondary condensation in the first condenser (3) are respectively connected between the first condenser (3) and the first filter (4), and a third valve (30) and a circulating pump (1) are arranged on the circulating condensation pipe (29); the first filter (4) and the first catalytic combustion device (5) are connected by a pipe, and a fifth pump (2) is arranged on the pipe.
6. The waste gas treatment system for biodiesel production by swill-cooked dirty oil according to claim 1, wherein: a water washing input pipe (35) is connected between the mixer (6) and the bottom of the water washing tank (7), and a water washing output pipe (36) is connected between the top of the water washing tank (7) and the second filter (8).
7. The waste gas treatment system for biodiesel production by swill-cooked dirty oil according to claim 6, wherein: the water washing pool (7) is respectively connected with a water inlet pipe (37) for water inlet and a water outlet pipe (38) for water outlet, the water inlet pipe (37) is provided with a water inlet valve (39), and the water outlet pipe (38) is provided with a water outlet valve (40).
8. The waste gas treatment system for biodiesel production by swill-cooked dirty oil according to claim 1, wherein: the vacuum waste gas conveying pipe (26) is provided with a third pump (27), and the non-vacuum waste gas conveying pipe (31) is provided with a fourth pump (32).
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