CN112404110B - Method and system for treating waste salt containing organic matters by adopting double-circulation thermodynamic purification technology - Google Patents
Method and system for treating waste salt containing organic matters by adopting double-circulation thermodynamic purification technology Download PDFInfo
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- CN112404110B CN112404110B CN202011377335.7A CN202011377335A CN112404110B CN 112404110 B CN112404110 B CN 112404110B CN 202011377335 A CN202011377335 A CN 202011377335A CN 112404110 B CN112404110 B CN 112404110B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- 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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
Abstract
The invention provides a method for treating waste salt containing organic matters by adopting a double-circulation thermal purification technology, which relates to the technical field of solid waste treatment, and comprises the steps that the waste salt containing the organic matters is decomposed into purified industrial waste salt and flue gas after entering a thermal kiln through a feeding bin; after entering the intermediate bin, the purified industrial waste salt is divided into two paths, wherein one path of the purified industrial waste salt enters the feeding bin in a recycling way through a variable-frequency reflux conveying system, and the other path of the purified industrial waste salt is discharged outwards through a finished product bin; the flue gas is divided into two paths after dust removal, combustion and purification, one path is circulated to the thermal kiln, and the other path is discharged outwards. The invention also provides a system adopting the method. The invention adopts a double-circulation mode to reduce TOC content of dried organic waste salt from 800ppm to 20000ppm to below 100ppm so as to meet the requirements of further impurity removal and salt separation, realize recycling of waste salt, simultaneously purify industrial waste salt for recycling, and overcome the phenomenon of melting and caking in the treatment process of the organic waste salt.
Description
Technical Field
The invention relates to the technical field of solid waste treatment, in particular to a method and a system for treating organic matter-containing waste salt by adopting a double-circulation thermal purification technology.
Background
The enterprises for producing waste salt mainly comprise national important industries such as coal chemical industry, pesticide, pharmacy, fine chemical industry, printing and dyeing and the like. The chemical waste salt pollution is serious, the human health is directly endangered, the ecological environment is destroyed, and the quality of surface water and underground water can be deteriorated, the land salinization and the like can be caused.
The amount of waste salt is huge, the regenerated product market is limited, the original salt has low value and high purification cost, the waste salt possibly enters a food chain, the human health is directly endangered, and the harmless management difficulty is great. At present, the harmless management measures of the waste salt mainly comprise: reducing emission, producing chemical raw materials, discharging sea and burying.
With the improvement of environmental protection requirements, the existing disposal means cannot meet the requirements of harmless management of waste salt, and particularly for three industries of pesticide, medicine and printing and dyeing, the disposal of waste salt becomes a bottleneck for restricting the development of the industry.
Due to the characteristics of large waste salt production, difficult incineration, limited landfill and the like, the recycling treatment of the waste salt is a feasible harmless management way, however, no mature technology for recycling the chemical waste salt exists at home and abroad at present, and the resource treatment of the waste salt relates to various key technologies such as organic matter removal, impurity removal, salt separation and the like, so that the method is still further broken through.
The organic matter removal is used as a key link in the recycling of the waste salt, and a good foundation is laid for the subsequent impurity removal and salt separation process by reducing TOC (total organic carbon) in the waste salt to below 100ppm, and meanwhile, the best energy practice can be realized by applying a multi-energy channel, waste salt and flue gas double-circulation technology, so that the occurrence of melting and caking phenomena in the waste salt treatment is avoided, and the technical problem to be solved urgently by the technicians in the field is solved.
Disclosure of Invention
In view of the above, one of the purposes of the present invention is to provide a method for treating waste salt containing organic matters by adopting a double-circulation thermal purification technology, so as to solve the technical problems that the TOC (total organic carbon) content of the dried waste salt in the prior art is not equal from 800ppm to 20000ppm, thereby failing to lay a good foundation for the subsequent impurity removal and salt separation processes, and melting agglomeration occurs in the waste salt treatment.
The second object of the invention is to provide a system for treating waste salt containing organic matters by adopting a double-circulation thermal purification technology.
In order to achieve one of the above objects, the present invention provides a method for treating waste salt containing organic matters using a double circulation thermodynamic purification technology, the method comprising:
the organic waste salt enters a thermal kiln through a feeding bin and is decomposed into purified industrial waste salt and flue gas;
the purified industrial waste salt enters an intermediate bin and is divided into two paths, one path of the purified industrial waste salt enters the feeding bin in a recycling way through a variable-frequency reflux conveying system, and the purified industrial waste salt and the organic waste salt which are not treated in the feeding bin are mixed together and enter the thermal kiln together, and the other path of the purified industrial waste salt is discharged outwards through a finished product bin;
the flue gas is divided into two paths after dust removal, combustion and purification, one path is circulated to the thermal kiln, and the other path is discharged outwards.
According to a preferred embodiment, the organic waste salt is pretreated before entering the feeding bin, then enters the thermal kiln through the feeding bin, stays in the thermal kiln for 30-120min, and the organic matters in the organic waste salt are thermally decomposed into the flue gas and the purified industrial waste salt.
According to a preferred embodiment, the thermal kiln is a rotary thermal kiln, the inclination angle of the rotary thermal kiln is 2-5 degrees, and the thermal kiln rotates 360 degrees.
According to a preferred embodiment, the thermal kiln is driven to rotate by a rotating motor, the frequency of the rotating motor is changed, and the residence time of the organic waste salt in the thermal kiln is adjusted.
According to a preferred embodiment, the temperature of the thermal kiln is adjustable in the range of 300-600 ℃, the temperature being adjusted by varying the power of the heating means of the thermal kiln, the combustion temperature of the flue gases and the flow rate of the circulating flue gases.
According to a preferred embodiment, the heating means is an electric heater or a burner.
According to a preferred embodiment, the recycle flue gas enters tangentially into the kiln tail of the thermal kiln.
According to a preferred embodiment, the kiln hood of the thermal kiln separates the clean industrial waste salt from the flue gas using a settling structure.
In order to achieve the second object, the present invention provides a system for treating waste salt containing organic matters by adopting a double-circulation thermal purification technology, comprising a waste salt treatment system for organic matters and a flue gas treatment system, wherein:
the organic matter waste salt treatment system comprises a feeding bin, a thermal kiln, an intermediate bin, a finished product bin and a reflux conveying system, wherein the thermal kiln, the intermediate bin and the finished product bin are sequentially connected end to end and communicated, the thermal kiln decomposes the organic matter waste salt to form purified industrial waste salt and flue gas, the thermal kiln is simultaneously connected and communicated with the feeding bin through the reflux conveying system, one path of the purified industrial waste salt flows back to the feeding bin through the reflux conveying system, and the other path of the purified industrial waste salt is discharged outwards through the finished product bin;
the flue gas treatment system is connected and communicated with the thermal kiln, and the flue gas is discharged from the thermal kiln and then treated by the flue gas treatment system, and circulates to the thermal kiln all the way and is discharged outwards all the way.
According to a preferred embodiment, the flue gas treatment system comprises a dust remover, a combustion chamber, a flue gas purification device and a circulating fan, wherein the dust remover is connected and communicated with the thermal kiln, the dust remover, the combustion chamber, the flue gas purification device and the circulating fan are sequentially connected end to end, flue gas is discharged from the thermal kiln and sequentially passes through the dust remover for dust removal, and after being combusted by the combustion chamber and purified by the flue gas purification device, the flue gas is circulated to the thermal kiln through the circulating fan.
According to a preferred embodiment, the flue gas purifying device further comprises an induced draft fan and a chimney, wherein the induced draft fan is simultaneously connected with the chimney and the flue gas purifying device, and the induced draft fan is used for discharging the standard flue gas purified by the flue gas purifying device outwards.
According to a preferred embodiment, the flue gas cleaning device comprises a semi-dry quenching and deacidification tower, an SNCR, a bag-type dust remover, a flue gas condenser and a flue gas heat exchanger.
According to a preferred embodiment, the thermal kiln is arranged as a rotary kiln with an inclination angle of 2 ° -5 °.
According to a preferred embodiment, a rotary motor is mounted at the bottom of the thermal kiln, said rotary motor being in driving connection with the thermal kiln, the frequency of said rotary motor being variable.
According to a preferred embodiment, an electric heater is mounted on the thermal kiln, which is divided into three independent circuits for controlling the temperature of the thermal kiln.
According to a preferred embodiment, a burner is mounted on the thermal kiln, the temperature of which is regulated by controlling the power of the burner.
According to a preferred embodiment, a humidifying water atomization spray gun and a water flow control loop are arranged at the kiln head of the thermal kiln and are used for controlling the water quantity of the thermal kiln.
According to a preferred embodiment, a nitrogen nozzle and a nitrogen flow control loop are arranged at the kiln head of the thermal kiln, and are used for controlling the nitrogen amount of the thermal kiln.
According to a preferred embodiment, the head cover of the thermal kiln is arranged in a drop-down configuration.
The method for treating the waste salt containing the organic matters by adopting the double-circulation thermal purification technology provided by the invention has the following technical effects:
the method mainly comprises two circulating thermal purification technologies, namely, after the purified industrial waste salt enters an intermediate bin, the waste salt enters a feeding bin in a circulating way through a variable-frequency reflux conveying system and is mixed with untreated organic waste salt in the feeding bin, the waste salt enters a thermal kiln together, the flue gas is divided into two paths after dust removal, combustion and purification, one path of the flue gas is recycled to the thermal kiln, the flue gas is discharged outwards after reaching standards, and the TOC content of the dried organic waste salt can be reduced from 800ppm to 20000ppm to below 100ppm by adopting the double-circulation mode so as to meet the requirements of further impurity removal and salt separation, realize the recycling of the waste salt, and simultaneously recycle the purified industrial waste salt and overcome the melting and caking phenomenon in the treatment process of the organic waste salt.
The system for treating the waste salt containing the organic matters by adopting the double-circulation thermal purification technology provided by the invention has the following technical effects:
the system is corresponding to the method, namely, the system mainly comprises an organic matter waste salt treatment system and a flue gas treatment system, wherein the organic matter treatment system comprises a feeding bin, a thermal kiln for decomposing organic matter waste salt, a middle bin, a finished product bin and a reflux conveying system, the feeding bin, the thermal kiln, the middle bin and the finished product bin are sequentially connected end to end and communicated, the thermal kiln decomposes the organic matter waste salt to form purified industrial waste salt and flue gas, the thermal kiln is simultaneously connected and communicated with the feeding bin through the reflux conveying system to form a cycle, and the purified industrial waste salt is refluxed to the feeding bin through the reflux conveying system; and the other path of circulation is flue gas circulation, the flue gas treatment system is connected and communicated with the thermal kiln, and the flue gas is discharged from the thermal kiln and treated by the flue gas treatment system, and flows back to the thermal kiln for circulation. The adoption of the double circulation system can reduce the TOC content of the dried organic waste salt from 800ppm to 20000ppm to below 100ppm so as to meet the requirements of further impurity removal and salt separation, realize the recycling of the waste salt, simultaneously purify the recycling of the industrial waste salt and overcome the melting and caking phenomenon in the treatment process of the organic waste salt.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a system for treating waste salts containing organic matter using a dual cycle thermal purification technique in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of the thermal kiln of FIG. 1;
FIG. 3 is a cross-sectional view of the kiln tail of the thermal kiln of FIG. 2 taken along the direction A-A;
wherein, fig. 1-3:
1. an organic matter waste salt treatment system; 101. a feeding bin; 102. a thermal kiln; 1021. a sedimentation structure; 1022. a rotating motor; 1023. an electric heater; 1024. kiln tail; 103. a middle bin; 104. a finished product bin;
2. a flue gas treatment system; 201. a dust remover; 202. a combustion chamber; 203. a flue gas purifying device; 204. a circulating fan; 205. an induced draft fan; 206. and (5) a chimney.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
The technical scheme of the invention is further described below by combining examples.
The method for treating the waste salt containing the organic matters by adopting the double-circulation thermal purification technology provided by the embodiment of the invention comprises the following steps: the organic waste salt enters a thermal kiln 102 through a feeding bin 101 and is decomposed into purified industrial waste salt and flue gas; the purified industrial waste salt enters the intermediate bin 103 and is divided into two paths, one path of the purified industrial waste salt enters the feeding bin 101 through the variable-frequency reflux conveying system in a recycling way, the purified industrial waste salt is mixed with the untreated organic waste salt in the feeding bin 101, the mixture enters the thermal kiln 102 together, and the other path of the purified industrial waste salt is discharged outwards through the finished product bin 104; the flue gas is divided into two paths after dust removal, combustion and purification, one path is circulated to the thermal kiln 102, and the other path is discharged outwards.
The method can be used for harmless recycling treatment of chemical waste salt, TOC content of the dried chemical waste salt is different from 800ppm to 20000ppm, and after the chemical waste salt is treated by a double-circulation thermodynamic purification system, namely organic waste salt is decomposed into purified chemical waste salt and smoke in a thermodynamic kiln 102, the purified chemical waste salt enters an intermediate bin 103 and then enters a feeding bin 101 in a circulating way through a variable-frequency reflux conveying system, so that the purpose of recycling treatment is achieved, and the smoke is also circulated to the thermodynamic kiln 102 after dust removal, combustion and purification, so that TOC content in the waste salt is reduced to below 100ppm, further impurity removal and salt separation are met, and the requirement of recycling of the waste salt is realized.
Further, the organic waste salt needs to be pretreated before entering the feeding bin 101, then enters the thermal kiln 102 through the feeding bin 101, stays in the thermal kiln 102 for 30-120min, the organic matters in the organic waste salt are thermally decomposed into smoke and purified industrial waste salt, the purified industrial waste salt is discharged to the intermediate bin 103 through the kiln tail 1024 of the thermal kiln 102, and the smoke is subjected to dust removal, combustion and purification treatment.
Further, the thermal kiln 102 adopts a rotary thermal kiln 102, the inclination angle is 2 degrees to 5 degrees, the thermal kiln 102 360 degrees rotates, and is particularly in driving connection with the rotating motor 1022, the frequency of the rotating motor 1022 is changed through driving rotation of the rotating motor 1022, and the residence time of the organic waste salt in the thermal kiln 102 can be adjusted, namely, the residence time in the thermal kiln 102 is 30-120min.
Further, the temperature of the thermal kiln 102 is adjustable within the range of 300-600 ℃, and the temperature can be adjusted by changing the power of a heating device of the thermal kiln 102, the combustion temperature of the flue gas and the flow rate of the circulating flue gas.
It should be noted that, the heating device of the present invention may be the electric heater 1023, the burner, or other types of heating devices, so long as the heating function of the thermal kiln can be achieved, and the present invention is not limited to this.
Further, the circulating flue gas enters the kiln tail 1024 of the thermal kiln 102 tangentially, namely, specifically, the circulating flue gas enters tangentially from the kiln tail 1024 270 degrees of the thermal kiln 102, as shown in fig. 2-3, the flue gas rotates in front of the thermal kiln 102, so that the contact area with the organic waste salt at the bottom of the thermal kiln 102 is increased, and the effect of full contact is achieved.
Further, the kiln head cover of the thermal kiln 102 adopts a sedimentation structure 1021 to separate the purified industrial waste salt and the flue gas, thereby realizing the separation of the purified industrial waste salt and the flue gas and reducing the quantity of the purified industrial waste salt carried by the flue gas into the combustion chamber 202.
The invention provides a system for treating waste salt containing organic matters by adopting a double-circulation thermal purification technology, which is shown in fig. 1-3, and comprises an organic matter waste salt treatment system 1 and a flue gas treatment system 2, wherein the organic matter treatment system comprises a feeding bin 101, a thermal kiln 102 for decomposing the waste salt containing organic matters, an intermediate bin 103, a finished product bin 104 and a reflux conveying system, the feeding bin 101, the thermal kiln 102, the intermediate bin 103 and the finished product bin 104 are sequentially connected end to end and communicated, the thermal kiln 102 decomposes the waste salt containing organic matters to form purified industrial waste salt and flue gas, the thermal kiln 102 is simultaneously connected and communicated with the feeding bin 101 through the reflux conveying system, and one path of the purified industrial waste salt flows back to the feeding bin 101 through the reflux conveying system and the other path of the purified industrial waste salt is discharged outwards through the finished product bin 104; the flue gas treatment system 2 is connected and communicated with the thermal kiln 102, and flue gas is treated by the flue gas treatment system 2 after being discharged from the thermal kiln 102, and circulates to the thermal kiln 102 all the way and is discharged outwards all the way.
The system of the embodiment corresponds to the method of the embodiment, namely, the system mainly comprises an organic matter waste salt treatment system 1 and a flue gas treatment system 2, wherein the organic matter waste salt treatment system 1 comprises a feeding bin 101, a thermal kiln 102 for decomposing organic matter waste salt, an intermediate bin 103, a finished product bin 104 and a reflux conveying system, the feeding bin 101, the thermal kiln 102, the intermediate bin 103 and the finished product bin 104 are sequentially connected end to end and communicated, the thermal kiln 102 decomposes the organic matter waste salt to form clean industrial waste salt and flue gas, the thermal kiln 102 is simultaneously connected and communicated with the feeding bin 101 through the reflux conveying system to form a cycle, and the clean industrial waste salt is refluxed to the feeding bin 101 through the reflux conveying system; the other path of circulation is flue gas circulation, the flue gas treatment system 2 is connected and communicated with the thermal kiln 102, and flue gas is discharged from the thermal kiln 102 and then treated by the flue gas treatment system 2, and the flue gas flows back to the thermal kiln 102. The adoption of the double circulation system can reduce the TOC content of the dried organic waste salt from 800ppm to 20000ppm to below 100ppm so as to meet the requirements of further impurity removal and salt separation, realize the recycling of the waste salt, simultaneously purify the industrial waste salt in circulation and overcome the melting and caking phenomenon in the treatment process of the organic waste salt.
After passing through the tail 1024 of the thermal kiln 102, the purified industrial waste salt enters the intermediate bin 103, the purified industrial waste salt of the intermediate bin 103 is connected with the feeding bin 101 through a variable-frequency reflux conveying system, and the purified industrial waste salt can circularly enter the feeding bin 101 through the reflux conveying system to be mixed with the industrial waste salt which is not treated in the feeding bin 101 and then enter the thermal kiln 102 together. The amount of recycled industrial waste salt can be adjusted by changing the frequency of the reflux conveying system.
By means of the mixing of the purified and unpurified industrial waste salts, the following effects can be achieved:
a. the adhesion and blockage phenomena of the industrial waste salt in the feeding bin 101 can be reduced;
b. reducing caking of industrial waste salts in the thermal kiln 102;
c. and (5) enhancing the heat transfer process and recovering a part of heat.
Further, the flue gas treatment system 2 comprises a dust remover 201, a combustion chamber 202, a flue gas purifying device 203 and a circulating fan 204, wherein the dust remover 201 is connected and communicated with the thermal kiln 102, the dust remover 201, the combustion chamber 202, the flue gas purifying device 203 and the circulating fan 204 are sequentially connected end to end, flue gas is discharged from the thermal kiln 102 and is dedusted by the dust remover 201, and after the combustion chamber 202 burns and the flue gas purifying device 203 purifies, the flue gas is circulated to the thermal kiln 102 through the circulating fan 204.
Still include draught fan 205 and chimney 206, draught fan 205 is connected with chimney 206 and fume cleaning device 203 simultaneously, and draught fan 205 is used for outwards discharging the up-to-standard flue gas after fume cleaning device 203 purifies.
Specifically, the flue gas from the thermal kiln 102 enters the dust remover 201 to separate out salts possibly carried in the flue gas.
It should be noted that, the combustion chamber 202 of the present invention is a sedimentation type combustion chamber, the flue gas from the dust remover 201 enters the combustion chamber 202, and is heated to 1100 ℃, and stays for 2s in the temperature range of 1100 ℃, so as to ensure that the gas compounds generated by pyrolysis in the thermal kiln 102 are completely decomposed in a harmless manner; the combustion chamber 202 is heated by natural gas, the combustion temperature is controlled by adjusting the natural gas flow, and the oxygen content in the flue gas is controlled by adjusting the fresh air flow.
The flue gas generated in the combustion chamber 202 enters the flue gas cleaning device 203, and the flue gas cleaning device 203 comprises: the flue gas temperature entering the induced draft fan 205 or the circulating fan 204 after heat exchange by the flue gas heat exchanger is 200 ℃, namely the flue gas after passing through the flue gas purifying device 203 is divided into two paths, one path enters the thermal kiln 102 by the circulating fan 204 to realize recycling of the flue gas, and the other path is discharged outwards by the induced draft fan 205 and the chimney 206 after reaching standards, and the discharge index of the flue gas discharged by the chimney 206 meets the requirements of GB 1884 hazardous waste incineration pollution control standard.
Wherein the condenser can reduce the water vapor content in the circulating flue gas.
Further, the electric heater 1023 is installed on the thermal kiln 102, and the electric heater 1023 is divided into three independent loops, as shown in fig. 2, and is used for controlling the temperature of the thermal kiln 102, namely, the temperature is controlled by the three independent loops, and the temperature control precision is +/-5 ℃.
Further, a humidifying water atomization spray gun and a water flow control loop are arranged at the kiln head of the thermal kiln 102, and the humidifying water atomization spray gun and the water flow control loop are used for controlling the water quantity of the thermal kiln 102 according to the organic matter removal effect in the actual organic matter waste salt.
Further, a nitrogen nozzle and a nitrogen flow control loop are arranged at the kiln head of the thermal kiln 102, and are used for controlling the nitrogen amount of the thermal kiln 102 according to the organic matter removal effect in the actual organic matter waste salt.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A method for treating waste salt containing organic matters by adopting a double-circulation thermal purification technology, which is characterized by comprising the following steps:
the organic waste salt enters a thermal kiln through a feeding bin and is decomposed into purified industrial waste salt and flue gas;
the purified industrial waste salt enters an intermediate bin and is divided into two paths, one path of the purified industrial waste salt enters the feeding bin in a recycling way through a variable-frequency reflux conveying system, and the purified industrial waste salt and the organic waste salt which are not treated in the feeding bin are mixed together and enter the thermal kiln together, and the other path of the purified industrial waste salt is discharged outwards through a finished product bin;
the flue gas is divided into two paths after dust removal, combustion and purification, one path is circulated to the thermal kiln, and the other path is discharged outwards; the organic matter waste salt is subjected to pretreatment before entering the feeding bin, then enters the thermal kiln through the feeding bin, stays in the thermal kiln for 30-120min, and is thermally decomposed into the flue gas and the purified industrial waste salt;
the circulating flue gas enters the kiln tail of the thermal kiln tangentially, and the circulating flue gas enters the kiln tail of the thermal kiln tangentially at 270 degrees.
2. The method for treating waste salt containing organic matters by adopting a double-circulation thermal purification technology according to claim 1, wherein the thermal kiln adopts a rotary thermal kiln, the inclination angle is 2-5 degrees, and the thermal kiln rotates 360 degrees.
3. The method for treating waste salt containing organic matters by adopting the double-circulation thermodynamic purification technology according to claim 2, wherein the thermodynamic kiln is driven to rotate by a rotating motor, the frequency of the rotating motor is changed, and the residence time of the waste salt containing organic matters in the thermodynamic kiln is adjusted.
4. The method for treating waste salt containing organic matter by adopting the double circulation thermodynamic purification technology according to claim 2, wherein the temperature of the thermodynamic kiln is adjustable within the range of 300-600 ℃, and the adjustment of the temperature can be realized by changing the power of a heating device of the thermodynamic kiln, the combustion temperature of the flue gas and the flow rate of circulating flue gas.
5. The method for treating organic-containing waste salt by using a double circulation thermal purification technology according to claim 1, wherein a kiln head cover of the thermal kiln adopts a sedimentation structure to separate the purified industrial waste salt and the flue gas.
6. A system for treating waste salt containing organic matters by adopting a double-circulation thermodynamic purification technology is characterized by comprising a waste salt treatment system containing organic matters and a flue gas treatment system, wherein:
the organic matter waste salt treatment system comprises a feeding bin, a thermal kiln, an intermediate bin, a finished product bin and a reflux conveying system, wherein the thermal kiln, the intermediate bin and the finished product bin are sequentially connected end to end and communicated, the thermal kiln decomposes the organic matter waste salt to form purified industrial waste salt and flue gas, the thermal kiln is simultaneously connected and communicated with the feeding bin through the reflux conveying system, one path of the purified industrial waste salt flows back to the feeding bin through the reflux conveying system, and the other path of the purified industrial waste salt is discharged outwards through the finished product bin;
the flue gas treatment system is connected and communicated with the thermal kiln, and the flue gas is discharged from the thermal kiln, treated by the flue gas treatment system, and circulated to the thermal kiln all the way and discharged outwards all the way;
the flue gas treatment system comprises a dust remover, a combustion chamber, a flue gas purification device and a circulating fan, wherein the dust remover is connected and communicated with the thermal kiln, the dust remover, the combustion chamber, the flue gas purification device and the circulating fan are sequentially connected end to end, flue gas is discharged from the thermal kiln and sequentially passes through the dust remover for dust removal, and after being combusted by the combustion chamber and purified by the flue gas purification device, the flue gas is circulated to the thermal kiln through the circulating fan.
7. The system for treating waste salt containing organic matters by adopting the double-circulation thermal purification technology according to claim 6, further comprising an induced draft fan and a chimney, wherein the induced draft fan is simultaneously connected with the chimney and the flue gas purification device, and the induced draft fan is used for discharging the standard-reaching flue gas purified by the flue gas purification device outwards.
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| CN107321755A (en) * | 2017-06-30 | 2017-11-07 | 江苏省环境科学研究院 | A kind of abraum salt process for reclaiming and its special purpose device |
| CN206911924U (en) * | 2017-06-30 | 2018-01-23 | 江苏省环境科学研究院 | Process unit for abraum salt recycling |
| CN207238730U (en) * | 2017-07-27 | 2018-04-17 | 重庆盎瑞悦科技有限公司 | Reclaimer is burned in a kind of negative-pressure cyclic accumulation of heat that harmlessness disposing is carried out to high saliferous chemical engineering sludge |
| CN110642271A (en) * | 2019-10-31 | 2020-01-03 | 江苏省环境科学研究院 | Device and method for melting treatment and refining of industrial waste salt |
| CN110805907A (en) * | 2019-10-16 | 2020-02-18 | 北京航化节能环保技术有限公司 | Process and device for treating solid waste salt cracking furnace containing water, organic matters and other soluble gases |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107321755A (en) * | 2017-06-30 | 2017-11-07 | 江苏省环境科学研究院 | A kind of abraum salt process for reclaiming and its special purpose device |
| CN206911924U (en) * | 2017-06-30 | 2018-01-23 | 江苏省环境科学研究院 | Process unit for abraum salt recycling |
| CN207238730U (en) * | 2017-07-27 | 2018-04-17 | 重庆盎瑞悦科技有限公司 | Reclaimer is burned in a kind of negative-pressure cyclic accumulation of heat that harmlessness disposing is carried out to high saliferous chemical engineering sludge |
| CN110805907A (en) * | 2019-10-16 | 2020-02-18 | 北京航化节能环保技术有限公司 | Process and device for treating solid waste salt cracking furnace containing water, organic matters and other soluble gases |
| CN110642271A (en) * | 2019-10-31 | 2020-01-03 | 江苏省环境科学研究院 | Device and method for melting treatment and refining of industrial waste salt |
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