CN114686247B - Treatment method of tar residues - Google Patents
Treatment method of tar residues Download PDFInfo
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- CN114686247B CN114686247B CN202011581716.7A CN202011581716A CN114686247B CN 114686247 B CN114686247 B CN 114686247B CN 202011581716 A CN202011581716 A CN 202011581716A CN 114686247 B CN114686247 B CN 114686247B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
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Abstract
The invention provides a tar residue treatment method, which comprises the steps of firstly placing tar residue in a high-temperature alkaline liquid environment to reduce viscosity, and simultaneously carrying out primary separation on tar residue by utilizing stirring effect; and then carrying out secondary filter pressing separation on the primarily separated tar residues, and finally carrying out high-temperature dry distillation on the secondarily separated tar residues to obtain crude gas and coke powder. According to the invention, the tar residues can be efficiently and thoroughly recovered through three steps of separation treatment on the tar residues, and products such as coal tar, coke powder and the like generated in each separation process can be sold or used by oneself, so that various problems caused by improper treatment of the tar residues are avoided, and additional economic benefits are brought to enterprises; meanwhile, the treatment steps of the method are simple and easy to realize, any high-cost and high-pollution equipment and materials are not needed, the cost is low, the method is environment-friendly, and large-scale and continuous treatment is very easy to realize.
Description
The technical field is as follows:
the invention relates to the technical field of coal chemical industry, in particular to a treatment method of tar residues.
The background art comprises the following steps:
in the traditional coking route, organic compounds with high boiling point can be condensed to form coal tar under the condition of ammonia water spray cooling of a gas collecting pipe or a primary cooler, and meanwhile, coal dust, semi-coke and the like carried in the coal gas are mixed in the coal tar to form tar residues. The tar slag is viscous waste slag, the main components of the tar slag comprise carbon-containing substances such as coal dust, coke powder, coal tar, asphaltene and polycyclic aromatic hydrocarbon, and the tar slag belongs to toxic and harmful solid waste slag, if the tar slag is not properly treated, not only is environmental pollution easily caused, but also resource waste is caused, and some polycyclic aromatic hydrocarbon substances with high boiling point can generate strong carcinogen benzopyrene when the tar slag is not completely combusted, so that the atmosphere is seriously polluted, and the health of people is harmed; but if the treatment is proper, the method also brings benefits.
The current treatment methods of tar residues can be divided into two types: the first type is to separate oil and residue in tar residue by physical method, recover valuable tar and further process and utilize, and common methods include solvent extraction separation and mechanical centrifugal separation. The second type is the development and utilization of tar residue as fuel and coal blending additive or resource, and common methods are used for coal blending coking, fuel and activated carbon preparation. However, various treatment methods still have many disadvantages, for example, it is difficult to find efficient, green and environment-friendly organic solvents in solvent extraction and separation, and the higher cost of the extractant further increases the production cost; the mechanical centrifugal separation effect is not thorough, so that the subsequent treatment is inconvenient, the purchase cost and the operation and maintenance cost of centrifugal equipment are high, and the centrifugal equipment is not suitable for most coal enterprises; if coal blending coking or direct fuel is used, resources are not fully utilized, and even pollutant discharge exceeds standard.
The invention content is as follows:
the invention aims to provide a tar residue treatment method which is efficient, environment-friendly, low in cost, thorough in recovery and easy to realize large-scale and continuous treatment.
The invention is implemented by the following technical scheme: a tar residue treatment method, comprising:
primary separation treatment: placing the tar residue in a high-temperature alkaline liquid environment, stirring and separating to obtain primarily separated tar residue and a liquid product, standing and layering the liquid product, and separating primary separated tar and alkaline liquid;
secondary separation treatment: carrying out filter pressing on the primary separation tar residue to obtain secondary separation tar residue and secondary separation tar;
and (3) third separation treatment: and carrying out high-temperature dry distillation on the secondary separation tar residues to obtain crude gas and coke powder.
Further, in the primary separation treatment step, the tar residue is heated, and then the heated tar residue is placed in an alkaline liquid environment to be stirred, so that the primary separated tar residue and the liquid product are obtained through separation.
Further, in the primary separation treatment step, the alkaline liquid separated by standing and layering is sent to the alkaline liquid environment for recycling.
Further, in the primary separation treatment step, the temperature of the discharged coal gas in the traditional coking route is increased, then the high-temperature tar residues which are collected after ammonia water spray cooling and mixed with ammonia water are directly used as the tar residues which are placed in the high-temperature alkaline liquid environment to be stirred, the primary separation tar residues and the tar ammonia water mixture are obtained through separation, the tar ammonia water mixture is subjected to standing and layering, and the primary separation tar and the ammonia water are separated.
And further, the separated ammonia water is sent to a circulating ammonia water system in the traditional coking route for recycling.
Further, in the primary separation treatment step, the conditions of the high-temperature alkaline liquid environment are as follows: the temperature is 72-80 ℃, and the pH value is 7.6-9.2.
Further, in the primary separation treatment step, the rotation speed of the stirring is 1280r/min.
Further, in the three separation treatment steps, the temperature of the high-temperature carbonization is 620-720 ℃.
Further, in the third separation processing step, the method further comprises: and cooling and purifying the crude gas to obtain three times of separated tar and pure gas.
The invention has the advantages that:
the tar residue treatment method provided by the invention comprises the following steps of firstly, placing the tar residue in a high-temperature alkaline liquid environment to reduce the viscosity, and simultaneously carrying out primary separation on the tar residue by utilizing the stirring effect; and then carrying out secondary filter pressing separation on the primarily separated tar residues, and finally carrying out high-temperature dry distillation on the secondarily separated tar residues to obtain crude gas and coke powder. The tar residues can be efficiently and thoroughly recovered through three steps of separation treatment on the tar residues, and products such as coal tar, coke powder and the like generated in each separation process can be sold or used by oneself, so that various problems caused by improper treatment of the tar residues are avoided, and additional economic benefits are brought to enterprises; meanwhile, the treatment steps of the method are simple and easy to realize, any high-cost and high-pollution equipment and materials are not needed, the cost is low, the method is environment-friendly, and large-scale and continuous treatment is very easy to realize.
Furthermore, the tar residue treatment method provided by the invention can also utilize the traditional coking route to provide a high-temperature alkaline liquid environment for the tar residue in the primary separation treatment step, namely, the temperature of the discharged coal gas in the traditional coking route is increased, then the high-temperature tar residue mixed with ammonia water can be collected after being sprayed and cooled by the ammonia water, and the tar residue is in the high-temperature alkaline liquid environment and is directly stirred and separated, so that the treatment process of the tar residue is greatly simplified, the requirement for newly added tar residue treatment equipment and materials is reduced, and the tar residue treatment method is very convenient for common coal enterprises to adopt and implement; in addition, the subsequently separated ammonia water can be sent into a circulating ammonia water system in the traditional coking route for cyclic utilization, so that the waste of resources is effectively avoided, and the treatment cost is greatly saved.
Description of the drawings:
fig. 1 is a schematic flow chart of a first embodiment of the present invention.
Fig. 2 is a schematic flow chart of a first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.
Fig. 4 is a schematic flow chart of a third embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a fourth embodiment of the present invention.
The components in the drawings are numbered as follows:
the high-temperature alkaline liquid environment unit 10, the heating device 110, a feeding port 1101 of the heating device 110, a discharging port 1102 of the heating device 110, the alkaline liquid device 120, a feeding port 1201 of the alkaline liquid device 120, a discharging port 1202 of the alkaline liquid device 120, a liquid inlet 1203 of the alkaline liquid device 120, the second carbonization device 130, a gas outlet 1302 of the second carbonization device 130, the second gas purification device 140, a gas inlet 1401 of the second gas purification device 140, an ammonia water spray device 141, a liquid inlet 1411 of the ammonia water spray device 141, a liquid outlet 1402 of the second gas purification device 140, the tar collection device 150, a liquid inlet 1501 of the tar collection device 150, a liquid outlet 1502 of the tar collection device 150, the circulating ammonia water device 160, a liquid inlet 1601 of the circulating ammonia water device 160, a liquid outlet 1602 of the circulating ammonia water device 160, the stirring device 20, the slag pumping device 30, a feeding port 301 of the slag pumping device 30, a discharging port 302 of the slag pumping device 30, the filter press filter device 40, a feeding port 401 of the filter press filter device 40, a gas outlet 402 of the filter device 40, the first gas purification device 50, a feeding port 501 of the first carbonization device 50, a gas outlet 501 of the first carbonization device 50, a gas tank 502 of the heating device 110, a gas tank 502, a gas tank 701, and a gas purification device 701.
The specific implementation mode is as follows:
the technical solutions 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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
The first embodiment is as follows:
the present embodiment provides a tar residue processing method, as shown in fig. 1, which includes:
s1, primary separation treatment: placing the tar residue in a high-temperature alkaline liquid environment, stirring and separating to obtain primarily separated tar residue and a liquid product, standing and layering the liquid product, and separating primarily separated tar and alkaline liquid;
s2, secondary separation treatment: carrying out filter pressing on the primary separation tar residues to obtain secondary separation tar residues and secondary separation tar;
s3, third separation treatment: and carrying out high-temperature dry distillation on the secondarily separated tar residues to obtain crude gas and coke powder.
It should be noted that, under the high-temperature alkaline liquid environment, the viscosity of the tar residue is reduced, the coal tar therein is easier to separate, and the solution is stirred simultaneously, so that the separation process of the tar residue is easier.
According to the tar residue treatment method provided by the embodiment, the tar residue can be efficiently and thoroughly recovered through three steps of separation treatment on the tar residue, and products such as coal tar, coke powder and the like generated in each separation process can be sold or used by oneself, so that various problems caused by improper treatment of the tar residue are avoided, and extra economic benefits are brought to enterprises; meanwhile, the treatment steps of the method are simple and easy to realize, any high-cost and high-pollution equipment and materials are not needed, the cost is low, the method is environment-friendly, and large-scale and continuous treatment is easy to realize.
For example, in the primary separation treatment step, the tar residue is heated, and then the heated tar residue is placed in an alkaline liquid environment for stirring, so as to separate the primary separated tar residue and the liquid product, as shown in fig. 2.
As an example, in the primary separation treatment step, the alkaline liquid separated by standing and layering is sent to the alkaline liquid environment for recycling, so that waste of resources can be effectively avoided, and treatment cost is greatly saved.
As an example, in the primary separation treatment step, the conditions of the high-temperature alkaline liquid environment are: the temperature is 72-80 ℃, and the pH value is 7.6-9.2.
As an example, in the primary separation treatment step, the rotation speed of the stirring is 1280r/min.
As an example, in the three separation treatment steps, the temperature of the high-temperature carbonization is 620-720 ℃.
It should be noted that the high-temperature dry distillation temperature is higher than that in the traditional coking route (550-580 ℃), so that tar residues can be decomposed more completely.
As an example, in the three separation processing steps, the method further includes: and cooling and purifying the crude gas to obtain three times of separated tar and pure gas.
In practical application, after the tar residue treatment method of the embodiment is adopted for treatment, the recovery rate of the tar residue is close to 100%.
Example two:
the present embodiment provides a tar residue processing system, as shown in fig. 3, which can be used to implement the tar residue processing method in the first embodiment, and the system in this embodiment includes a high-temperature alkaline liquid environment unit 10, a stirring device 20, a residue extraction device 30, a standing and layering device, a filter pressing device 40, and a first carbonization device 50;
the stirring device 20 and the slag pumping device 30 are both arranged in the high-temperature alkaline liquid environment unit 10, the liquid outlet of the high-temperature alkaline liquid environment unit 10 is communicated with the liquid inlet of the standing layering device, the discharge hole 302 of the slag pumping device 30 is communicated with the feed inlet 401 of the filter pressing device 40, and the slag outlet 402 of the filter pressing device 40 is communicated with the feed inlet 501 of the first carbonization device 50.
The high-temperature alkaline liquid environment unit 10 is arranged to provide a high-temperature alkaline liquid environment for the tar residues, so that the viscosity of the tar residues is reduced, the tar residues are easier to separate from tar, meanwhile, the stirring device 20 is used for stirring to realize the primary separation of the tar residues, and liquid products after the tar residues are separated can be sent into a standing layering device for separation; and then, the residue extraction device 30 is used for sending the primarily separated tar residues into a filter pressing device 40 for secondary separation, and the separated tar residues are sent into a first carbonization device 50 for high-temperature dry distillation to realize tertiary separation and produce crude gas and coke powder. The tar residue treatment system of the embodiment can realize efficient and thorough recovery of tar residues through three-step separation treatment of the tar residues, and products such as coal tar, coke powder and the like generated in each separation process can be sold or used by oneself, so that various problems caused by improper treatment of the tar residues are avoided, and extra economic benefits are brought to enterprises; meanwhile, most of the devices in the embodiment are common devices for coal enterprises, and high-cost and high-pollution devices and materials are not used, so that the device is low in cost and environment-friendly, and is very easy to realize large-scale and continuous production.
It should be noted that the optional conditions when the tar residue is stirred in the high-temperature alkaline liquid environment unit 10 are as follows: the temperature is 72 ℃ to 80 ℃, the pH value is 7.6 to 9.2, and the stirring speed is 1280r/min.
It should be noted that the tar residue is subjected to the high-temperature dry distillation in the first carbonization device 50 at a temperature of 620 ℃ to 720 ℃, wherein the high-temperature dry distillation temperature is higher than the high-temperature dry distillation temperature (550 ℃ to 580 ℃) of the carbonization device in the traditional coking route, so that the tar residue can be decomposed more completely.
As an example, the high-temperature alkaline liquid environment unit 10 comprises a heating device 110 and an alkaline liquid device 120, a discharge port 1102 of the heating device 110 is communicated with a feed port 1201 of the alkaline liquid device 120, a liquid outlet 1202 of the alkaline liquid device 120 is communicated with a liquid inlet of the standing and layering device, the stirring device 20 and the slag extracting device 30 are both arranged in the alkaline liquid device 120, and a feed port 301 of the slag extracting device 30 is arranged at the bottom of the alkaline liquid device 120.
It should be noted that the liquid product after the tar residue is separated from the alkali liquor device 120 is sent into the standing and layering device for standing and layering, and then the tar and the alkaline liquid can be separated.
It should be noted that the lye unit 120 can be an ammonia tank.
As an example, the liquid outlet of the standing and layering device is communicated with the liquid inlet 1203 of the alkali liquor device 120.
It should be noted that, the alkaline liquid separated from the standing and layering device is sent to the alkaline liquid device 120 again for recycling, so that the waste of resources can be effectively avoided, and the treatment cost is greatly saved.
By way of example, the standing and layering device comprises a plurality of standing tanks 60 connected in series, wherein initial liquid inlets 601 of the plurality of standing tanks 60 connected in series are communicated with a liquid outlet of the high-temperature alkaline liquid environment unit 10, and specifically, initial liquid inlets 601 of the plurality of standing tanks 60 connected in series are communicated with a liquid outlet 1202 of the alkali device 120.
It should be noted that, a plurality of standing tanks 60 connected in series may be communicated with the liquid inlet 1203 of the alkali solution apparatus 120 through the last liquid outlet 602, or may be communicated with the liquid inlet 1203 of the alkali solution apparatus 120 through a total liquid outlet after the liquid outlets on each standing tank 60 are collected, and the specific connection mode may be set according to actual conditions, and in fig. 3, the last liquid outlet 602 is communicated with the liquid inlet 1203 of the alkali solution apparatus 120 as an example.
As an example, the tar residue processing system of this embodiment further includes a first gas purification device 70, and a gas inlet 701 of the first gas purification device 70 is communicated with a gas outlet 502 of the first carbonization device 50, so as to perform cooling and purification treatment on the raw gas generated in the first carbonization device 50, and further separate out the coal tar contained in the raw gas.
It should be noted that the first gas purification device 70 may include a gas collecting pipe, a venturi tower, a cyclone tower, and an electrical tar precipitator, which are all in the prior art, and are not described herein again, and the specific combination of the devices may be selected according to actual requirements.
Illustratively, the agitation device 20 is an agitation pump and the pressure filtration device 40 is a filter press.
As an example, the slag extraction device 30 is a submerged pump.
As an example, the first carbonization device 50 is a carbonization furnace.
The specific use of this example is as follows:
sending the tar residues into the heating device 110 through a feeding hole 1101 of the heating device 110 for heating, then sending the tar residues into the alkali liquor device 120 through a feeding hole 1201 of the alkali liquor device 120, realizing primary separation of the tar residues under the stirring action of the stirring device 20, pumping the tar residues after primary separation into the pressure filtration device 40 for secondary separation through the residue pumping device 30, and sending liquid products obtained after primary separation into the standing tank 60 for standing and layering, thereby separating tar and alkaline liquid; the filter pressing device 40 can further separate part of the coal tar in the tar residue, the tar residue separated after the secondary separation by the filter pressing device 40 is sent to the first carbonization device 50 for high-temperature dry distillation to realize the tertiary separation and produce crude gas and coke powder, wherein the crude gas is further cooled and purified by the first gas purification device 70 to separate the coal tar in the crude gas, and the products such as the coal tar, the coke powder and the like produced in each separation treatment step can be sold or used by oneself, and in practical application, the tar residue treated by the system of the embodiment achieves a recovery rate close to 100%.
Example three:
this embodiment provides a method for processing tar residue, as shown in fig. 4, which is substantially the same as the method for processing tar residue described in the first embodiment, and is not repeated herein, but the differences are: in the first separation processing step, improve the temperature of the coal gas of going out of the stove among the traditional coking route, later will collect through aqueous ammonia spray cooling back mix with aqueous ammonia high temperature tar sediment direct as arranging in the high temperature alkaline liquid state environment the tar sediment stirs, and the separation obtains first separation tar sediment and tar aqueous ammonia mixture will the layering is stood to tar aqueous ammonia mixture, separates first separation tar and aqueous ammonia.
It is noted that the temperature of the gas discharged from the traditional coking route can be increased by increasing the flow of the return gas and the air, and the temperature of the hearth of the original coke oven is 550-580 ℃, and is increased to 580-620 ℃.
In the embodiment, a high-temperature alkaline liquid environment is provided for the tar residues in the primary separation treatment step by using the traditional coking route, the treatment process of the tar residues is greatly simplified, the requirement for newly added tar residue treatment equipment and materials is reduced, and the method is very convenient for common coal enterprises to adopt and implement.
As an example, the separated ammonia water is sent to a circulating ammonia water system in a traditional coking route for recycling, so that the waste of resources is effectively avoided, and the treatment cost is greatly saved.
Example four:
this embodiment provides a tar residue processing system, which can be used to implement the tar residue processing method in the third embodiment, as shown in fig. 5, the basic structure of which is the same as that in the second embodiment, and is not repeated here, but the differences are:
in this embodiment, the high-temperature alkaline liquid environment unit 10 includes a second carbonization device 130, a second gas purification device 140 and a tar collection device 150, an air outlet 1302 of the second carbonization device 130 is communicated with an air inlet 1401 of the second gas purification device 140, an ammonia spray device 141 is disposed in the second gas purification device 140, an air outlet 1402 of the second gas purification device 140 is communicated with an air inlet 1501 of the tar collection device 150, an air outlet 1502 of the tar collection device 150 is communicated with an air inlet of the standing and layering device, the stirring device 20 and the slag extraction device 30 are both disposed in the tar collection device 150, and an air inlet 301 of the slag extraction device 30 is disposed at the bottom of the tar collection device 150.
It should be noted that the second carbonization device 130, the second gas purification device 140, and the tar collection device 150 in the tar residue treatment system of the embodiment are all devices in the conventional coking route, wherein the temperature of the furnace chamber of the second carbonization device 130 is 580 ℃ -620 ℃, and is higher than the temperature (550 ℃ -580 ℃) of the furnace chamber of the carbonization device in the conventional coking route, so as to increase the temperature of the discharged gas, thereby increasing the temperature of the tar residue collected after being sprayed by the ammonia water spraying device 141 in the subsequent second gas purification device 140, and then the high-temperature tar residue mixed with ammonia water and collected by the tar collection device 150 can be used as the tar residue in the high-temperature alkaline liquid environment for stirring.
It should be noted that the second carbonization device 130 can be a carbonization furnace; the second gas purification device 140 can comprise a gas collecting pipe, a Venturi tower, a cyclone tower and an electric tar precipitator, the ammonia water spraying device 141 can comprise an ammonia water sprayer, an ammonia water spraying pipe and the like, and the specific equipment combination can be selected according to actual requirements; the tar collecting device 150 may be a tar collecting tank, and the above devices are all in the prior art and will not be described herein.
The embodiment utilizes the equipment in the traditional coking route to directly provide the high-temperature alkaline liquid environment for the tar residue, namely utilizes the carbonization device, the gas purification device and the tar collecting device in the traditional coking route as the high-temperature alkaline liquid environment unit 10, greatly simplifies the treatment process of the tar residue, reduces the requirement of newly-added tar residue treatment equipment and materials, and is very convenient for common coal enterprises to adopt and implement.
As an example, the standing and layering device includes a plurality of standing tanks 60 connected in series, where initial liquid inlets 601 of the plurality of standing tanks 60 connected in series are communicated with a liquid outlet of the high-temperature alkaline liquid environment unit 10, and specifically, the initial liquid inlets 601 of the plurality of standing tanks 60 connected in series are communicated with a liquid outlet 1502 of the tar collecting device 150.
As an example, the high-temperature alkaline liquid environment unit 10 further includes a circulating ammonia water device 160, a liquid outlet of the standing and layering device is communicated with a liquid inlet 1601 of the circulating ammonia water device 160, and a liquid outlet 1602 of the circulating ammonia water device 160 is communicated with a liquid inlet 1411 of the ammonia water spraying device 141.
It should be noted that the circulating ammonia water device 160 may be a circulating ammonia water system in a conventional coking route, which is a prior art and is not described herein again.
It should be noted that, the multiple serially connected standing tanks 60 may be communicated with the liquid inlet 1601 of the circulating ammonia water apparatus 160 through the last liquid outlet 602, or may be communicated with the liquid inlet 1601 of the circulating ammonia water apparatus 160 through a total liquid outlet after the liquid outlets of the standing tanks 60 are collected, and the specific connection manner may be set according to actual conditions, and fig. 5 illustrates that the last liquid outlet 602 is communicated with the liquid inlet 1601 of the circulating ammonia water apparatus 160.
It should be noted that, in this embodiment, the liquid product entering the standing and layering device is a tar ammonia water mixture, and after standing and layering, the separated ammonia water is sent to a circulating ammonia water system in a traditional coking route for recycling, so that waste of resources can be effectively avoided, and the treatment cost is greatly saved.
In practical application, the tar residue treated by the system of the embodiment achieves a recovery rate close to 100%.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A tar residue treatment method is characterized by comprising the following steps:
primary separation treatment: raising the temperature of the discharged gas in the traditional coking route, then directly taking the high-temperature tar residue mixed with ammonia water and collected after being cooled by ammonia water spraying as the tar residue placed in a high-temperature alkaline liquid environment for stirring, separating to obtain a primarily separated tar residue and a tar ammonia water mixture, standing and layering the tar ammonia water mixture, and separating primary separated tar and ammonia water;
secondary separation treatment: carrying out filter pressing on the primary separation tar residue to obtain secondary separation tar residue and secondary separation tar;
and (3) third separation treatment: and carrying out high-temperature dry distillation on the secondary separation tar residues to obtain crude gas and coke powder.
2. The tar residue treatment method according to claim 1, wherein the separated ammonia is sent to a circulating ammonia system in a conventional coking route for recycling.
3. The tar slag treatment method according to claim 1 or 2, wherein in the primary separation treatment step, the conditions of the high-temperature alkaline liquid environment are as follows: the temperature is 72-80 ℃, and the pH value is 7.6-9.2.
4. The tar residue processing method according to claim 1 or 2, wherein the rotation speed of the stirring in the primary separation processing step is 1280r/min.
5. The tar slag treatment method according to claim 1 or 2, wherein the high temperature dry distillation is performed at 620 ℃ to 720 ℃ in the three separation treatment steps.
6. The tar residue treatment method according to claim 1 or 2, further comprising, in the third separation treatment step: and cooling and purifying the crude gas to obtain third-time separation tar and pure gas.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09151381A (en) * | 1995-11-30 | 1997-06-10 | Kawasaki Steel Corp | Treatment of tar residue |
| CN207418667U (en) * | 2017-11-27 | 2018-05-29 | 胡建华 | A kind of tar slag disposal system |
| CN208907097U (en) * | 2018-10-11 | 2019-05-28 | 陕西东鑫垣化工有限责任公司 | Semi-coke device tar slag recovery and processing system |
| CN111961492A (en) * | 2020-08-15 | 2020-11-20 | 新疆新业能源化工有限责任公司 | Tar residue resource utilization process |
-
2020
- 2020-12-28 CN CN202011581716.7A patent/CN114686247B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09151381A (en) * | 1995-11-30 | 1997-06-10 | Kawasaki Steel Corp | Treatment of tar residue |
| CN207418667U (en) * | 2017-11-27 | 2018-05-29 | 胡建华 | A kind of tar slag disposal system |
| CN208907097U (en) * | 2018-10-11 | 2019-05-28 | 陕西东鑫垣化工有限责任公司 | Semi-coke device tar slag recovery and processing system |
| CN111961492A (en) * | 2020-08-15 | 2020-11-20 | 新疆新业能源化工有限责任公司 | Tar residue resource utilization process |
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