CN107936986A - It is pyrolyzed the system and method for raw coke oven gas segmentation export and oil cooling recycling tar - Google Patents
It is pyrolyzed the system and method for raw coke oven gas segmentation export and oil cooling recycling tar Download PDFInfo
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- CN107936986A CN107936986A CN201711437418.9A CN201711437418A CN107936986A CN 107936986 A CN107936986 A CN 107936986A CN 201711437418 A CN201711437418 A CN 201711437418A CN 107936986 A CN107936986 A CN 107936986A
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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
- C10B27/00—Arrangements for withdrawal of the distillation gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
- B01D17/02—Separation of non-miscible liquids
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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
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
- C10K1/046—Reducing the tar content
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/16—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids
- C10K1/18—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids hydrocarbon oils
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Abstract
The invention discloses a kind of system and method for being pyrolyzed raw coke oven gas segmentation export and oil cooling recycling tar, including pyrolysis oven high temperature section raw coke oven gas export mouth, pyrolysis oven low-temperature zone raw coke oven gas export mouth, spray column one, spray column two, primary cooler, electrical tar precipitator, gas fan, pyrolysis oven high temperature section raw coke oven gas export mouth is connected with the entrance of spray column one, pyrolysis oven low-temperature zone raw coke oven gas export mouth is connected with the entrance of spray column two, the raw coke oven gas outlet of spray column one enters primary cooler after converging with the raw coke oven gas outlet of spray column two, the outlet of primary cooler is connected with the entrance of electrical tar precipitator, electrical tar precipitator gas exit connects gas fan entrance, gas fan outlet is connected with purified treatment workshop section.Not only solve the difficult separation problem of light oil and heavy oil of the raw coke oven gas rich in tar, solve at the same time in chilling process, the problem of dust, tar, water more difficult separation, and low system thermal efficiency in current low temperature pyrogenation raw coke oven gas purification technique, recycling heat poor quality can be solved, the problems such as recycling tar water content is high, tar recovery process is complicated.
Description
Technical field
The present invention relates to a kind of pyrolysis of coal technology, more particularly to a kind of pyrolysis raw coke oven gas segmentation export and oil cooling recycling tar
System and method.
Background technology
As the increasingly deficient and people of petroleum and natural gas resource are to the inherently required of the utilization ratio of resource and environmental protection,
Coal using form, there occurs great change.Pyrolysis of coal technology is the important channel of coal sub-prime high-efficiency cleaning trans-utilization
One of, the products of clean three kinds of different shapes of gas, liquid, solid can be produced by pyrolysis of coal, then to heterogeneity in coal into
Row sub-prime utilizes, i.e. air-liquid product is used as chemicals, and solid coal Jiaozhuo is the raw material further to gasify.Pyrolysis of coal technology
The step sub-prime for realizing coal utilizes, and has not only improved the comprehensive utilization ratio and value-added content of product of coal resources, but also reduce combustion
Environmental pollution caused by coal, has significant economic benefit, social benefit and environmental benefit.
It is extremely important link in pyrolytic process of coal to be pyrolyzed raw coke oven gas dedusting and tar recycling.Industrial pyrolysis coal gas at present
The technique that cooling and tar recycling are mainly combined using the directly quick chilling of a large amount of ammonia sprays and electrically trapped tar oil, though the technique
So can be by pyrolyzing coal air cooling to proper temperature, but the process has following significant shortcoming：First, coal gas cools down and tar
A large amount of high-concentration organic substance wastewaters are produced in removal process, environmental pollution is serious；Second, in coal gas cooling and tar removal process
A large amount of sensible heats entrained by pyrolysis coal gas are wasted, can not the rationally high efficiente callback part heat, therefore using ammonium hydroxide spray
The pyrolytic process of coal thermal efficiency of the directly quick chilling coal gas of leaching is relatively low.3rd, institute in tar recovery process in pyrolysis industry at present
Obtained tar is entrainment of substantial amounts of pyrolysis water, and follow-up water-oil separating difficulty is big, high processing costs.Therefore, it is domestic at present very much
Manufacturing enterprise and R＆D institution are all actively improving or are upgrading existing gas cleaning system, it is intended to develop a kind of high-efficiency energy-saving ring
Protect, the system and method that technique is simply pyrolyzed raw coke oven gas purification and tar recycles.
The prior art one：
A kind of raw gas cooling and fractionation method and coking apparatus of 103509608 A of Chinese patent CN, raw coke oven gas cooling point
It is that the raw coke oven gas for will be discharged from coke furnace carbonization chamber recycles to evaporate method, the raw coke oven gas that will be discharged from coke furnace carbonization chamber
Directly cool down, and during the raw coke oven gas is cooled down step by step, carried step by step according to the order of cut boiling point from high to low step by step
Take the different fractions in the raw coke oven gas.Raw coke oven gas cooling fractional method not only reduces energy consumption and pollution, reduces production
Cost；And improve the organic efficiency of raw coke oven gas.
The shortcomings that prior art one：
System complex industrialization does not have operability；Tar production technique is grafted onto in raw coke oven gas cooling procedure, is created
New property is not strong.
The prior art two：
The apparatus and method that 103254942 A of Chinese patent CN directly cool down high temperature raw coke oven gas using cooling water,
Its device includes the first chuck direct cooler, oil spilling groove, sieve-plate tower, water-oil separating unit, the second chuck direct cooler, nothing
The direct cooling unit of chuck；Wherein described first chuck direct cooler successively with the oil spilling groove, sieve-plate tower, water-oil separating list
Member is connected, and the sieve-plate tower is connected with the second chuck direct cooler, without the direct cooling unit of chuck successively, and described first
Chuck direct cooler is connected by gas outlet tube with the sieve-plate tower.It not only ensure that the cooling effect of raw coke oven gas, but also
Greatly reduce the treating capacity of oily wastewater.Simple in structure, all static equipments, without power consumption, failure rate is low, operation dimension
Shield is convenient.
The shortcomings that prior art two：
The basic set pattern of traditional raw coke oven gas cooling is not broken away from, simply traditional raw coke oven gas type of cooling is thickened
Cooling system, operability be not strong.
The prior art three：
104629816 A of Chinese patent CN are disclosed burnt from refrigeration mode from the preliminary cooling device of refrigeration mode coal oven dithio-gas
The preliminary cooling device of stove raw coke oven gas, including coal gas heat recovery cooler, coal gas water recirculator, gas refrigeration water cooling
Device, coal gas heat recovery cooler top are equipped with gas inlet, and gas refrigeration water cooler lower part is equipped with gas exit, coal gas heat
Amount recycles cooler and is connected with generation evaporator, and evaporator occurs with condenser occurs and combines integral, generation condenser and suction
Evaporator connection is received, evaporator occurs and is connected with solution heat exchanger, solution heat exchanger is connected with absorptive condenser；Solution heat exchanger
It is connected with solution circulation pump, solution heat exchanger is connected with coal gas heat recovery cooler；Absorb evaporator and absorptive condenser group
Synthesis is overall, absorbs evaporator and is connected with gas refrigeration water cooler, and absorptive condenser is connected with solution circulation pump, solution circulation
Pump is connected with solution heat exchanger；Evaporator, absorptive condenser, generation evaporator, generation condenser is absorbed to be connected with vacuum pump.Change
The thermal efficiency is high.
The shortcomings that existing patent three：
In actual mechanical process, system jams outstanding problem, system can not long-term operation.
The content of the invention
The object of the present invention is to provide a kind of system and method for being pyrolyzed raw coke oven gas segmentation export and oil cooling recycling tar.
The purpose of the present invention is what is be achieved through the following technical solutions：
The pyrolysis raw coke oven gas segmentation export of the present invention and the system of oil cooling recycling tar, including pyrolysis oven high temperature section raw coke oven gas
Export mouth, pyrolysis oven low-temperature zone raw coke oven gas export mouth, spray column one, spray column two, primary cooler, electrical tar precipitator, gas fan,
Pyrolysis oven high temperature section raw coke oven gas export mouth is connected with the entrance of spray column one, pyrolysis oven low-temperature zone raw coke oven gas export mouth and spray column
Two entrance is connected, and the raw coke oven gas outlet of spray column one enters primary cooler after converging with the raw coke oven gas outlet of spray column two, just cold
The outlet of device is connected with the entrance of electrical tar precipitator, and electrical tar precipitator gas exit connection gas fan entrance, gas fan goes out
Mouth is connected with purified treatment workshop section.
The above-mentioned pyrolysis raw coke oven gas segmentation export of the present invention and the system of oil cooling recycling tar realize pyrolysis raw coke oven gas point
Section export and the method for oil cooling recycling tar, comprise the following steps：
Step 1：The high temperature raw coke oven gas drawn from pyrolysis pyrolysis stove high temperature section initially enters spray column one, and raw coke oven gas is from spray
One bottom of leaching tower enters realizes that raw coke oven gas is uniformly distributed in spray column one through gas distribution grid, and coal tar is at the top of spray column one
Entrance enters spray column, and the circulation tar nozzle set through tower body top realizes the spray of tar, makes tar and raw coke oven gas adverse current
Contact, has the function that raw coke oven gas cooling and dedusting, absorbs tar；Raw coke oven gas after cooling is exported and sprayed from one tower top of spray column
Raw coke oven gas derived from tower two mixes；
Step 2：The low temperature raw coke oven gas drawn from pyrolysis pyrolysis stove low-temperature zone initially enters spray column two, and raw coke oven gas is from spray
Two bottom of leaching tower enters realizes that low temperature raw coke oven gas is uniformly distributed in spray column through gas distribution grid, and spray column two is divided to two sections of sprays
Leaching, tower middle part are equipped with disconnected tower tray, and epimere is sprayed using coalite tar, and hypomere is sprayed using high temperature coal-tar, and epimere, hypomere spray
Self-organizing system is drenched, low temperature raw coke oven gas initially enters the weight of the hypomere and tar heavy oil nozzle spray at the top of spray column hypomere of spray column two
Tar inversely contacts, cooling dedusting, recycling light tar；Raw coke oven gas after cooling dedusting, recycling light tar is through disconnected tower tray middle part
Coal gas leadout hole enter the epimere of spray column two, inversely contact cooling with the light tar of light tar nozzle spray at the top of epimere and remove
After dirt, recycling light tar, primary cooler is mixed into from the export of the top of spray column two and raw coke oven gas derived from the top of spray column one；
Step 3：From spray column one, spray column two top derived from raw coke oven gas, after collecting enter primary cooler top,
Chilled water following current indirect heat exchange with coming from circulating water refrigeration system makes raw coke oven gas further cool down, and raw coke oven gas walks shell side, system
Cold water walks tube side, and raw coke oven gas after cooling is drawn from the bottom conduit of primary cooler, and the chilled water after heating is from the bottom of primary cooler
Circulating water refrigeration system is exited into, the oil water mixture produced in raw coke oven gas condensation process divides from primary cooler bottom into grease
From groove；
Step 4：The raw coke oven gas come out from primary cooler enters electrical tar precipitator from top, is drawn from electrical tar precipitator bottom,
Raw coke oven gas realizes the further trapping of raw coke oven gas entrainment coal tar in electrical tar precipitator, and the oil water mixture of trapping is cold from coal gas
But tower bottom is discharged into oil-water separation tank；
Step 5：The raw coke oven gas drawn from electrical tar precipitator, out-of-bounds further purified treatment is transported to through wind turbine.
As seen from the above technical solution provided by the invention, pyrolysis raw coke oven gas segmentation provided in an embodiment of the present invention is led
Go out the system and method with oil cooling recycling tar, the difficult separation for not only solving light oil and heavy oil of the raw coke oven gas rich in tar is difficult
The problem of topic, while solves in chilling process, the more difficult separation of dust, tar, water, and current low temperature pyrogenation famine coal can be solved
System thermal efficiency is low in gas purification technique, recycles heat poor quality, recycles tar water content height, tar recovery process complexity etc.
Problem.
Brief description of the drawings
Fig. 1 is the system and method that tar is recycled in pyrolysis raw coke oven gas segmentation export and oil cooling provided in an embodiment of the present invention
Structure diagram.
In figure：
1st, spray column one, 2, spray column two, 3, primary cooler, 4, electrical tar precipitator, 5, gas fan.
Embodiment
The embodiment of the present invention will be described in further detail below.What is be not described in detail in the embodiment of the present invention is interior
Appearance belongs to the prior art known to professional and technical personnel in the field.
The pyrolysis raw coke oven gas segmentation export of the present invention and the system of oil cooling recycling tar, its preferable embodiment
It is：
Including pyrolysis oven high temperature section raw coke oven gas export mouth, pyrolysis oven low-temperature zone raw coke oven gas export mouth, spray column one, spray column
2nd, primary cooler, electrical tar precipitator, gas fan, pyrolysis oven high temperature section raw coke oven gas export mouth are connected with the entrance of spray column one, heat
Solution stove low-temperature zone raw coke oven gas export mouth is connected with the entrance of spray column two, the raw coke oven gas outlet of spray column one and the famine of spray column two
Gas exit enters primary cooler after converging, and the outlet of primary cooler is connected with the entrance of electrical tar precipitator, and electrical tar precipitator coal gas goes out
Mouth connection gas fan entrance, gas fan outlet are connected with purified treatment workshop section.
The spray column one is empty spray tower, and top is equipped with light tar spray port, and one lower part of spray column is equipped with light tar
Groove, the light tar groove are connected by filter, heat exchanger and light tar pump inlet；
The spray column two is two sections of settings, and disconnected tower tray is equipped with the middle part of tower, and the top of hypomere is equipped with tar heavy oil spray port, on
The top of section is equipped with light tar spray port, and two lower part of spray column is equipped with tar heavy oil groove, and the tar heavy oil groove is through another filtering
Device, heat exchanger and tar heavy oil pump inlet connect；
The light tar pump discharge and the light tar spray port on the top of two epimere of top and spray column of spray column one connect
Connect, the tar heavy oil pump discharge is connected with the tar heavy oil spray port on the top of two hypomere of spray column.
The tar heavy oil groove is connected with tar heavy oil dashpot, and tar heavy oil dashpot is connected with tar heavy oil whizzer, weight
The tar heavy oil outlet of tar whizzer is connected with the tar heavy oil groove all the way, another way and external connection；
The light tar groove is connected with light tar dashpot, and light tar dashpot is connected with light tar whizzer, gently
The light tar outlet of tar whizzer is connected with the light tar groove all the way, another way and external connection.
Coal gas primary cooler and the electrical tar precipitator bottom offers tar and condensed water discharge outlet, the tar with it is cold
Condensate outlet connects oil-water separation tank, and the tar outlet of the oil-water separation tank accesses the light tar dashpot, the oil
The condensation-water drain of water separating tank is connected with sewage disposal system.
The coal gas primary cooler cold tubular heat exchanger between being, main body include tube side and shell side, Jiao are provided with above tube side
Oil nozzle, shell side are provided with circulating cooling water entrance and are connected to circulating water refrigeration system.
The above-mentioned pyrolysis raw coke oven gas segmentation export of the present invention and the system of oil cooling recycling tar realize pyrolysis raw coke oven gas point
Section export and the method for oil cooling recycling tar, its preferable embodiment are：
Comprise the following steps：
Step 1：The high temperature raw coke oven gas drawn from pyrolysis pyrolysis stove high temperature section initially enters spray column one, and raw coke oven gas is from spray
One bottom of leaching tower enters realizes that raw coke oven gas is uniformly distributed in spray column one through gas distribution grid, and coal tar is at the top of spray column one
Entrance enters spray column, and the circulation tar nozzle set through tower body top realizes the spray of tar, makes tar and raw coke oven gas adverse current
Contact, has the function that raw coke oven gas cooling and dedusting, absorbs tar；Raw coke oven gas after cooling is exported and sprayed from one tower top of spray column
Raw coke oven gas derived from tower two mixes；
Step 2：The low temperature raw coke oven gas drawn from pyrolysis pyrolysis stove low-temperature zone initially enters spray column two, and raw coke oven gas is from spray
Two bottom of leaching tower enters realizes that low temperature raw coke oven gas is uniformly distributed in spray column through gas distribution grid, and spray column two is divided to two sections of sprays
Leaching, tower middle part are equipped with disconnected tower tray, and epimere is sprayed using coalite tar, and hypomere is sprayed using high temperature coal-tar, and epimere, hypomere spray
Self-organizing system is drenched, low temperature raw coke oven gas initially enters the weight of the hypomere and tar heavy oil nozzle spray at the top of spray column hypomere of spray column two
Tar inversely contacts, cooling dedusting, recycling light tar；Raw coke oven gas after cooling dedusting, recycling light tar is through disconnected tower tray middle part
Coal gas leadout hole enter the epimere of spray column two, inversely contact cooling with the light tar of light tar nozzle spray at the top of epimere and remove
After dirt, recycling light tar, primary cooler is mixed into from the export of the top of spray column two and raw coke oven gas derived from the top of spray column one；
Step 3：From spray column one, spray column two top derived from raw coke oven gas, after collecting enter primary cooler top,
Chilled water following current indirect heat exchange with coming from circulating water refrigeration system makes raw coke oven gas further cool down, and raw coke oven gas walks shell side, system
Cold water walks tube side, and raw coke oven gas after cooling is drawn from the bottom conduit of primary cooler, and the chilled water after heating is from the bottom of primary cooler
Circulating water refrigeration system is exited into, the oil water mixture produced in raw coke oven gas condensation process divides from primary cooler bottom into grease
From groove；
Step 4：The raw coke oven gas come out from primary cooler enters electrical tar precipitator from top, is drawn from electrical tar precipitator bottom,
Raw coke oven gas realizes the further trapping of raw coke oven gas entrainment coal tar in electrical tar precipitator, and the oil water mixture of trapping is cold from coal gas
But tower bottom is discharged into oil-water separation tank；
Step 5：The raw coke oven gas drawn from electrical tar precipitator, out-of-bounds further purified treatment is transported to through wind turbine.
In the step 1, enter gently at the bottom one of spray column one with the light tar after high temperature raw coke oven gas dust-collecting and heat exchanging
Tar groove, then enter light tar heat exchanger after light tar filter impurity screening and exchange heat, the light tar weight tar after heat exchange
It is pumped at the top of two epimere of spray column and realizes circulated sprinkling；Light tar groove is connected with light tar dashpot, light tar dashpot
It is connected with light tar whizzer, light tar whizzer realizes light tar water-oil separating, the light tar part after separation
Return to and enter light tar groove, partly send outside.
In the step 2, the heavy coal tar of two hypomere of spray column and high temperature raw coke oven gas dust-collecting and heat exchanging, from spray column two
Bottom of towe enters tar heavy oil groove, then enters tar heavy oil heat exchanger after tar heavy oil filter impurity screening and exchange heat, and the weight after heat exchange is burnt
Oil is pumped to two hypomere top showerhead of spray column through tar heavy oil, realizes circulated sprinkling；The tar heavy oil dashpot is burnt with weight
Oil groove is connected, and point that tar heavy oil and dust are realized through tar heavy oil separator is drawn in the tar heavy oil part in tar heavy oil dashpot
Tar heavy oil groove is returned from, tar heavy oil after separation, and the tar heavy oil slag containing dust is delivered coal system；
Raw coke oven gas enters spray column epimere after hypomere spraying cooling through disconnected tower tray, is inversely contacted with the light tar of spray,
Raw coke oven gas is further cooled down, last raw coke oven gas is exported through spraying tower top, and light tar flows into light tar groove certainly after being pooled to disconnected tower tray.
In the step 2, after raw coke oven gas is inversely contacted into spray column two with light coal tar derived from low-temperature zone, from
Two bottom of spray column enters light tar dashpot, then draws out of light tar circulating slot through light tar circulating pump and realized through heat exchanger
Light tar drops to appropriate temperature, light Jiao in entrance two spraying cooling raw coke oven gas of spray column, the light tar dashpot
The separation that light tar and dust are realized through light tar separator is drawn in oily part, and light tar returns to light tar dashpot, containing dust
Light tar slag deliver coal system；
In the step 3, raw coke oven gas produces in primary cooler condensation oil water mixture and the grease of electrical tar precipitator trapping
Mixture enters oil-water separation tank, and condensed water water discharges sewage disposal system from the water out of oil-water separation tank, and tar is from oil
Water separating tank tar outlet is sent to light tar dashpot, and the tar in light, tar heavy oil dashpot is with the cooling of raw coke oven gas, tar
Amount constantly accumulation, meets after spray column raw coke oven gas spray that rich tar is drawn after tar pipeloop heat exchanger and adds into tar
Work system, tar water content is 2.0%~2.5% in above-mentioned tar groove.
The pyrolysis raw coke oven gas segmentation export of the present invention and the system and method for oil cooling recycling tar, not only solve raw coke oven gas
The difficult separation problem of light oil and heavy oil rich in tar, while solve in chilling process, dust, tar, water are more difficult separated
Problem, and low system thermal efficiency in current low temperature pyrogenation raw coke oven gas purification technique, recycling heat poor quality, recycling Jiao can be solved
The problems such as oily moisture is high, tar recovery process is complicated.
Specific embodiment one, as shown in Figure 1：
A kind of system and method for being pyrolyzed raw coke oven gas segmentation export and oil cooling recycling tar, including：Pyrolysis oven high temperature section is waste
Coal gas export mouth, pyrolysis oven low-temperature zone raw coke oven gas export mouth, the entrance of pyrolysis oven high temperature section raw coke oven gas export mouth and spray column 1
It is connected, pyrolysis oven low-temperature zone raw coke oven gas export mouth is connected with the entrance of spray column 22, the raw coke oven gas outlet and spray of spray column 1
The raw coke oven gas outlet of leaching tower 1 enters primary cooler after converging, and the outlet of primary cooler is connected with the entrance of electrical tar precipitator, electric tar
Oily device gas exit connects coal gas coal gas fans entrance, and gas fan realizes that coal gas sends purified treatment outside.
Step 1：850 DEG C drawn from pyrolysis pyrolysis stove high temperature section, gas volume 2500Nm3 high temperature raw coke oven gas initially enters
Spray column 1, raw coke oven gas enters from one 1 bottom of spray column realizes that raw coke oven gas uniformly divides in spray column 1 through gas distribution grid
Cloth, light coal tar enter spray column from one 1 top entry of spray column, and the circulation tar nozzle set through tower body top realizes tar
Spray, the spray flux 125m3/h of light coal tar, makes tar and high temperature raw coke oven gas counter current contacting, reach raw coke oven gas cooling and dedusting,
Absorb the effect of tar；70 DEG C of raw coke oven gas is cooled to mix with raw coke oven gas derived from spray column 22 from the export of one 1 tower top of spray column
Close；
Step 2：450 DEG C drawn from pyrolysis pyrolysis stove low-temperature zone, the low temperature raw coke oven gas of 2500Nm3 initially enters spray
Tower 22, raw coke oven gas enters from 22 bottom of spray column realizes that low temperature raw coke oven gas is uniformly distributed in spray column through gas distribution grid,
Two sections of sprays of spray column 22 point, tower middle part are equipped with disconnected tower tray, and epimere is sprayed using light coal tar, and hypomere is sprayed using heavy coal tar
Leaching, epimere, hypomere spray self-organizing system, epimere light coal tar spray flux 80m3/h, hypomere weight coal tar spray flux 45m3/h,
The tar heavy oil that low temperature raw coke oven gas initially enters the hypomere and tar heavy oil nozzle spray at the top of spray column hypomere of spray column 22 inversely connects
Touch, cooling dedusting, recycling light tar；Raw coke oven gas after cooling dedusting, recycling light tar is through the coal gas export in the middle part of disconnected tower tray
Hole inversely contacts cooling dedusting, recycling gently into the epimere of spray column 22 with the light tar of light tar nozzle spray at the top of epimere
Temperature is down to 70 DEG C after tar, and export is cold at the beginning of being mixed into raw coke oven gas derived from the top of spray column 1 at the top of spray column 22
Device
Step 3：From spray column 1, spray column 22 top derived from 70 DEG C of raw coke oven gas, after collecting into primary cooler
Top, the chilled water following current indirect heat exchange with coming from circulating water refrigeration system makes raw coke oven gas further cool down, and freeze water inlet
23 DEG C of raw coke oven gas of temperature walk shell side, and chilled water walks tube side, are cooled to 23 DEG C of raw coke oven gas and are drawn from the bottom conduit of primary cooler, are risen
Temperature to the chilled water after 40 DEG C exits into circulating water refrigeration system from the bottom of primary cooler, temperature is cooled back to 23 DEG C, famine
The oil water mixture produced in coal gas condensation process enters oil-water separation tank from primary cooler bottom；
Step 4：The 23 DEG C of raw coke oven gas come out from primary cooler enter electrical tar precipitator from top, from electrical tar precipitator bottom
Draw, raw coke oven gas realizes the further trapping of raw coke oven gas entrainment coal tar in electrical tar precipitator, drops raw coke oven gas oiling content
To 50mg/Nm3, the oil water mixture of trapping is discharged into oil-water separation tank from coal gas cooling tower bottom；
Step 5：The raw coke oven gas drawn from electrical tar precipitator, out-of-bounds further purified treatment is transported to through wind turbine.
In the step 1, enter with the light tar after high temperature raw coke oven gas dust-collecting and heat exchanging at the bottom one of spray column 1
Light tar groove, then through light tar filter impurity screening, light tar impurity content is not higher than 12g/m3, changed afterwards into light tar
Hot device heat exchange, makes the temperature of light tar be down to 60 DEG C by 85 DEG C, the light tar after heat exchange is pumped to spray column through weight tar
Circulated sprinkling is realized at the top of 22 epimeres；Light tar groove is connected with light tar dashpot, light tar dashpot and light tar centrifugation point
Connected from device, light tar whizzer realizes light tar water-oil separating, and light tar whizzer is intermittently operated, makes light Jiao
Oil is aqueous to be down to 2%, and the light tar after separation, 90% returns into light tar groove, and 10% sends outside.
In the step 2, the heavy coal tar of 22 hypomere of spray column and high temperature raw coke oven gas dust-collecting and heat exchanging, from spray column 22
Bottom of towe enter tar heavy oil groove, then through tar heavy oil filter impurity screening, impurity content is not higher than 3%, it is burnt subsequently into weight
Oil heat exchanger exchanges heat, and the tar heavy oil after heat exchange is pumped to 22 hypomere top showerhead of spray column through tar heavy oil, realizes circulation spray
Leaching；The tar heavy oil dashpot is connected with tar heavy oil groove, and the tar heavy oil part in tar heavy oil dashpot is drawn through tar heavy oil
Separator realizes the separation of tar heavy oil and water, dust, and tar heavy oil separator is intermittently operated, and the tar heavy oil 95% after separation returns
Tar heavy oil groove, 5% sends outside, and the tar heavy oil slag containing dust is delivered coal system；
Raw coke oven gas enters spray column epimere, light Jiao with spray after hypomere spraying cooling through disconnected tower tray in the step 2
Oily reverse contact, further cools down raw coke oven gas, and last raw coke oven gas is exported through spraying tower top, and light tar flows automatically after being pooled to disconnected tower tray
Enter light tar groove.
In the step 2, after raw coke oven gas is inversely contacted into spray column 22 with light coal tar derived from low-temperature zone, from
22 bottom of spray column enters light tar dashpot, then drawn through light tar circulating pump out of light tar circulating slot through heat exchanger reality
Show light tar and drop to appropriate temperature, it is light in entrance 22 spraying cooling raw coke oven gas of spray column, the light tar dashpot
Tar fraction draws the separation that light tar and dust are realized through light tar separator, and light tar returns to light tar dashpot, containing powder
The light tar slag of dirt is delivered coal system；
In the step 3, raw coke oven gas produces in primary cooler condensation oil water mixture and the grease of electrical tar precipitator trapping
Mixture enters oil-water separation tank, and condensed water water discharges sewage disposal system from the water out of oil-water separation tank, and tar is from oil
Water separating tank tar outlet is sent to light tar dashpot, and the tar in light, tar heavy oil dashpot is with the cooling of raw coke oven gas, tar
Amount constantly accumulation, meets after spray column raw coke oven gas spray that rich tar is drawn after tar pipeloop heat exchanger and adds into tar
Work system, tar water content is 2% in above-mentioned tar groove.
Specific embodiment two, referring back to Fig. 1：
A kind of system and method for being pyrolyzed raw coke oven gas segmentation export and oil cooling recycling tar, including：Pyrolysis oven high temperature section is waste
Coal gas export mouth, pyrolysis oven low-temperature zone raw coke oven gas export mouth, the entrance of pyrolysis oven high temperature section raw coke oven gas export mouth and spray column 1
It is connected, pyrolysis oven low-temperature zone raw coke oven gas export mouth is connected with the entrance of spray column 22, the raw coke oven gas outlet and spray of spray column 1
The raw coke oven gas outlet of leaching tower 1 enters primary cooler after converging, and the outlet of primary cooler is connected with the entrance of electrical tar precipitator, electric tar
Oily device gas exit connects coal gas coal gas fans entrance, and gas fan realizes that coal gas sends purified treatment outside.
Step 1：750 DEG C drawn from pyrolysis pyrolysis stove high temperature section, gas volume 2500Nm3 high temperature raw coke oven gas initially enters
Spray column 1, raw coke oven gas enters from one 1 bottom of spray column realizes that raw coke oven gas uniformly divides in spray column 1 through gas distribution grid
Cloth, weight coal tar enter spray column from one 1 top entry of spray column, and the circulation tar nozzle set through tower body top realizes tar
Spray, the spray flux 115m3/h of high temperature coal-tar, makes tar and high temperature raw coke oven gas counter current contacting, reach raw coke oven gas cooling remove
Dirt, the effect for absorbing tar；It is cooled to waste coal derived from 70 DEG C of raw coke oven gas from the export of one 1 tower top of spray column and spray column 22
Gas mixes；
Step 2：430 DEG C drawn from pyrolysis pyrolysis stove low-temperature zone, the low temperature raw coke oven gas of 2500Nm3 initially enters spray
Tower 22, raw coke oven gas enters from 22 bottom of spray column realizes that low temperature raw coke oven gas is uniformly distributed in spray column through gas distribution grid,
Two sections of sprays of spray column 22 point, tower middle part are equipped with disconnected tower tray, and epimere is sprayed using light coal tar, and hypomere is sprayed using heavy coal tar
Leaching, epimere, hypomere spray self-organizing system, epimere light coal tar spray flux 70m3/h, hypomere weight coal tar spray flux 40m3/h,
The tar heavy oil that low temperature raw coke oven gas initially enters the hypomere and tar heavy oil nozzle spray at the top of spray column hypomere of spray column 22 inversely connects
Touch, cooling dedusting, recycling light tar；Raw coke oven gas after cooling dedusting, recycling light tar is through the coal gas export in the middle part of disconnected tower tray
Hole inversely contacts cooling dedusting, recycling gently into the epimere of spray column 22 with the light tar of light tar nozzle spray at the top of epimere
Temperature is down to 72 DEG C after tar, and export is cold at the beginning of being mixed into raw coke oven gas derived from the top of spray column 1 at the top of spray column 22
Device
Step 3：From spray column 1, spray column 22 top derived from 72 DEG C of raw coke oven gas, after collecting into primary cooler
Top, the chilled water following current indirect heat exchange with coming from circulating water refrigeration system makes raw coke oven gas further cool down, and freeze water inlet
22 DEG C of raw coke oven gas of temperature walk shell side, and chilled water walks tube side, are cooled to 22 DEG C of raw coke oven gas and are drawn from the bottom conduit of primary cooler, are risen
Temperature to the chilled water after 41 DEG C exits into circulating water refrigeration system from the bottom of primary cooler, temperature is cooled back to 22 DEG C, famine
The oil water mixture produced in coal gas condensation process enters oil-water separation tank from primary cooler bottom；
Step 4：The 22 DEG C of raw coke oven gas come out from primary cooler enter electrical tar precipitator from top, from electrical tar precipitator bottom
Draw, raw coke oven gas realizes the further trapping of raw coke oven gas entrainment coal tar in electrical tar precipitator, drops raw coke oven gas oiling content
To 30mg/Nm3, the oil water mixture of trapping is discharged into oil-water separation tank from coal gas cooling tower bottom；
Step 5：The raw coke oven gas drawn from electrical tar precipitator, out-of-bounds further purified treatment is transported to through wind turbine.
In the step 1, enter with the light tar after high temperature raw coke oven gas dust-collecting and heat exchanging at the bottom one of spray column 1
Light tar groove, then through light tar filter impurity screening, light tar impurity content is not higher than 10g/m3, changed afterwards into light tar
Hot device heat exchange, makes the temperature of light tar be down to 62 DEG C by 83 DEG C, the light tar after heat exchange is pumped to spray column through weight tar
Circulated sprinkling is realized at the top of 22 epimeres；Light tar groove is connected with light tar dashpot, light tar dashpot and light tar centrifugation point
Connected from device, light tar whizzer realizes light tar water-oil separating, and light tar whizzer is intermittently operated, makes light Jiao
Oil is aqueous to be down to 1.5%, and the light tar after separation, 95% returns into light tar groove, and 5% sends outside.
In the step 2, the heavy coal tar of 22 hypomere of spray column and high temperature raw coke oven gas dust-collecting and heat exchanging, from spray column 22
Bottom of towe enter tar heavy oil groove, then through tar heavy oil filter impurity screening, impurity content is not higher than 5%, it is burnt subsequently into weight
Oil heat exchanger exchanges heat, and the tar heavy oil after heat exchange is pumped to 22 hypomere top showerhead of spray column through tar heavy oil, realizes circulation spray
Leaching；The tar heavy oil dashpot is connected with tar heavy oil groove, and the tar heavy oil part in tar heavy oil dashpot is drawn through tar heavy oil
Separator realizes the separation of tar heavy oil and water, dust, and tar heavy oil separator is intermittently operated, and the tar heavy oil 90% after separation returns
Tar heavy oil groove, 10% sends outside, and the tar heavy oil slag containing dust is delivered coal system；
Raw coke oven gas enters spray column epimere, light Jiao with spray after hypomere spraying cooling through disconnected tower tray in the step 2
Oily reverse contact, further cools down raw coke oven gas, and last raw coke oven gas is exported through spraying tower top, and light tar flows automatically after being pooled to disconnected tower tray
Enter light tar groove.
In the step 2, after raw coke oven gas is inversely contacted into spray column 22 with light coal tar derived from low-temperature zone, from
22 bottom of spray column enters light tar dashpot, then drawn through light tar circulating pump out of light tar circulating slot through heat exchanger reality
Show light tar and drop to appropriate temperature, it is light in entrance 22 spraying cooling raw coke oven gas of spray column, the light tar dashpot
Tar fraction draws the separation that light tar and dust are realized through light tar separator, and light tar returns to light tar dashpot, containing powder
The light tar slag of dirt is delivered coal system；
In the step 3, raw coke oven gas produces in primary cooler condensation oil water mixture and the grease of electrical tar precipitator trapping
Mixture enters oil-water separation tank, and condensed water water discharges sewage disposal system from the water out of oil-water separation tank, and tar is from oil
Water separating tank tar outlet is sent to light tar dashpot, and the tar in light, tar heavy oil dashpot is with the cooling of raw coke oven gas, tar
Amount constantly accumulation, meets after spray column raw coke oven gas spray that rich tar is drawn after tar pipeloop heat exchanger and adds into tar
Work system, tar water content is 2.5% in above-mentioned tar groove.
The present invention using the coal tar that low temperature pyrogenation in coal charge produces as raw coke oven gas cool down it is cold remove medium, it is effective must gram
Take traditional raw coke oven gas and be difficult to separated problem with cyclic ammonia water cooling tar, ammonium hydroxide, dust；
During using coal tar to the spraying cooling of raw coke oven gas, dedusting and side line centrifugation point have been carried out to coal tar
From, fully ensured that circulation coal tar in impurity content it is not exceeded, kept spraying effect；
In primary cooler cooling procedure and electrical tar precipitator catches the tar that gets off, there is provided oil-water separation tank realize tar and
The separation of condensed water, returns tar and is fitted in circulation coal tar, save mechanizeding ammonia clarifying groove huge in traditional handicraft, save
Investment is saved.
The present invention does cooling medium with the coal tar contained in raw coke oven gas, makes raw coke oven gas is as far as possible few in cooling procedure to produce
Condensed water.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can readily occur in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (9)
1. a kind of system for being pyrolyzed raw coke oven gas segmentation export and oil cooling recycling tar, it is characterised in that including pyrolysis oven high temperature section
Raw coke oven gas export mouth, pyrolysis oven low-temperature zone raw coke oven gas export mouth, spray column one, spray column two, primary cooler, electrical tar precipitator, coal
Gas wind turbine, pyrolysis oven high temperature section raw coke oven gas export mouth are connected with the entrance of spray column one, pyrolysis oven low-temperature zone raw coke oven gas export mouth
It is connected with the entrance of spray column two, the raw coke oven gas outlet of spray column one enters just cold after converging with the raw coke oven gas outlet of spray column two
Device, the outlet of primary cooler are connected with the entrance of electrical tar precipitator, electrical tar precipitator gas exit connection gas fan entrance, coal gas
Fan outlet is connected with purified treatment workshop section.
2. pyrolysis raw coke oven gas segmentation export according to claim 1 and the system of oil cooling recycling tar, it is characterised in that institute
Spray column one is stated as empty spray tower, top is equipped with light tar spray port, and one lower part of spray column is equipped with light tar groove, described light burnt
Oil groove is connected by filter, heat exchanger and light tar pump inlet；
The spray column two is two sections of settings, and disconnected tower tray is equipped with the middle part of tower, and the top of hypomere is equipped with tar heavy oil spray port, epimere
Top is equipped with light tar spray port, and two lower part of spray column is equipped with tar heavy oil groove, the tar heavy oil groove through another filter, change
Hot device is connected with tar heavy oil pump inlet；
The light tar pump discharge is connected with the light tar spray port on the top of two epimere of top and spray column of spray column one, institute
The tar heavy oil spray port that tar heavy oil pump discharge is stated with the top of two hypomere of spray column is connected.
3. pyrolysis raw coke oven gas segmentation export according to claim 2 and the system of oil cooling recycling tar, it is characterised in that institute
State tar heavy oil groove to be connected with tar heavy oil dashpot, tar heavy oil dashpot is connected with tar heavy oil whizzer, tar heavy oil centrifugation point
Tar heavy oil outlet from device is connected with the tar heavy oil groove all the way, another way and external connection；
The light tar groove is connected with light tar dashpot, and light tar dashpot is connected with light tar whizzer, light tar
The light tar outlet of whizzer is connected with the light tar groove all the way, another way and external connection.
4. pyrolysis raw coke oven gas segmentation export according to claim 3 and the system of oil cooling recycling tar, it is characterised in that institute
State coal gas primary cooler and electrical tar precipitator bottom offers tar and condensed water discharge outlet, the tar and condensed water discharge outlet
Oil-water separation tank is connected, the tar outlet of the oil-water separation tank accesses the light tar dashpot, the oil-water separation tank
Condensation-water drain is connected with sewage disposal system.
5. pyrolysis raw coke oven gas segmentation export according to claim 4 and the system of oil cooling recycling tar, it is characterised in that institute
Cold tubular heat exchanger between stating coal gas primary cooler and being, main body include tube side and shell side, tar nozzle, shell side are provided with above tube side
It is provided with circulating cooling water entrance and is connected to circulating water refrigeration system.
6. the system of a kind of claim 1 to 5 any one of them pyrolysis raw coke oven gas segmentation export and oil cooling recycling tar is realized
The method for being pyrolyzed raw coke oven gas segmentation export and oil cooling recycling tar, it is characterised in that comprise the following steps：
Step 1：The high temperature raw coke oven gas drawn from pyrolysis pyrolysis stove high temperature section initially enters spray column one, and raw coke oven gas is from spray column
One bottom, which enters, through gas distribution grid realizes that raw coke oven gas is uniformly distributed in spray column one, and coal tar is from one top entry of spray column
Into spray column, the circulation tar nozzle set through tower body top realizes the spray of tar, makes tar and raw coke oven gas counter current contacting,
Have the function that raw coke oven gas cooling and dedusting, absorb tar；Raw coke oven gas after cooling exports and spray column two from one tower top of spray column
Derived raw coke oven gas mixing；
Step 2：The low temperature raw coke oven gas drawn from pyrolysis pyrolysis stove low-temperature zone initially enters spray column two, and raw coke oven gas is from spray column
Two bottoms enter realizes that low temperature raw coke oven gas is uniformly distributed in spray column through gas distribution grid, and spray column two is divided to two sections of sprays, tower
Middle part is sprayed equipped with disconnected tower tray, epimere using coalite tar, and hypomere is sprayed using high temperature coal-tar, and epimere, hypomere spray are certainly
Into system, low temperature raw coke oven gas initially enters the tar heavy oil of the hypomere and tar heavy oil nozzle spray at the top of spray column hypomere of spray column two
Reverse contact, cooling dedusting, recycling light tar；Raw coke oven gas after cooling dedusting, recycling light tar is through the coal in the middle part of disconnected tower tray
Conductance is portalled into the epimere of spray column two, with the light tar of light tar nozzle spray at the top of epimere inversely contact cooling dedusting,
After recycling light tar, primary cooler is mixed into from the export of the top of spray column two and raw coke oven gas derived from the top of spray column one；
Step 3：From spray column one, spray column two top derived from raw coke oven gas, after collecting enter primary cooler top, with come
Raw coke oven gas is set further to cool down from the chilled water following current indirect heat exchange in circulating water refrigeration system, raw coke oven gas walks shell side, chilled water
Tube side is walked, raw coke oven gas after cooling is drawn from the bottom conduit of primary cooler, and the chilled water after heating is flowed out from the bottom of primary cooler
Into circulating water refrigeration system, the oil water mixture produced in raw coke oven gas condensation process enters water-oil separating from primary cooler bottom
Groove；
Step 4：The raw coke oven gas come out from primary cooler enters electrical tar precipitator from top, is drawn from electrical tar precipitator bottom, waste coal
Gas realizes the further trapping of raw coke oven gas entrainment coal tar in electrical tar precipitator, and the oil water mixture of trapping is from coal gas cooling tower
Bottom is discharged into oil-water separation tank；
Step 5：The raw coke oven gas drawn from electrical tar precipitator, out-of-bounds further purified treatment is transported to through wind turbine.
7. pyrolysis raw coke oven gas segmentation export according to claim 6 and the method for oil cooling recycling tar, it is characterised in that institute
State in step 1, enter light tar groove at the bottom one of spray column one with the light tar after high temperature raw coke oven gas dust-collecting and heat exchanging, then
Enter light tar heat exchanger after light tar filter impurity screening to exchange heat, the light tar weight tar after heat exchange is pumped to spray
Circulated sprinkling is realized at the top of leaching two epimere of tower；Light tar groove is connected with light tar dashpot, light tar dashpot and light tar from
Centrifugal separator connects, and light tar whizzer realizes light tar water-oil separating, and the light tar part after separation is returned into light
Tar groove, partly sends outside.
8. pyrolysis raw coke oven gas segmentation export according to claim 7 and the method for oil cooling recycling tar, it is characterised in that institute
State in step 2, the heavy coal tar of two hypomere of spray column and high temperature raw coke oven gas dust-collecting and heat exchanging, enter weight from the bottom of towe of spray column two
Tar groove, then enter tar heavy oil heat exchanger after tar heavy oil filter impurity screening and exchange heat, the tar heavy oil after heat exchange is through tar heavy oil
Two hypomere top showerhead of spray column is pumped to, realizes circulated sprinkling；The tar heavy oil dashpot is connected with tar heavy oil groove,
Draw the separation that tar heavy oil and dust are realized through tar heavy oil separator, the weight after separation in tar heavy oil part in tar heavy oil dashpot
Tar returns to tar heavy oil groove, and the tar heavy oil slag containing dust is delivered coal system；
Raw coke oven gas enters spray column epimere after hypomere spraying cooling through disconnected tower tray, is inversely contacted with the light tar of spray, into one
Step cooling raw coke oven gas, last raw coke oven gas are exported through spraying tower top, and light tar flows into light tar groove certainly after being pooled to disconnected tower tray.
9. pyrolysis raw coke oven gas segmentation export according to claim 8 and the method for oil cooling recycling tar, it is characterised in that institute
State in step 2, after raw coke oven gas is inversely contacted into spray column two with light coal tar derived from low-temperature zone, from two bottom of spray column
Portion enters light tar dashpot, then is drawn through light tar circulating pump out of light tar circulating slot and realize that light tar drops to through heat exchanger
Appropriate temperature, the light tar part in entrance two spraying cooling raw coke oven gas of spray column, the light tar dashpot are drawn
The separation of light tar and dust is realized through light tar separator, light tar returns to light tar dashpot, the light tar slag containing dust
Deliver coal system；
In the step 3, raw coke oven gas produces in primary cooler condensation oil water mixture and the oil mixing with water of electrical tar precipitator trapping
Thing enters oil-water separation tank, and condensed water water discharges sewage disposal system from the water out of oil-water separation tank, and tar divides from grease
Light tar dashpot is sent to from groove tar outlet, the tar in light, tar heavy oil dashpot is with the cooling of raw coke oven gas, and tar content is not
Disconnected accumulation, meets after spray column raw coke oven gas spray that rich tar is drawn after tar pipeloop heat exchanger and enters tar production system
Unite, tar water content is 2.0%~2.5% in above-mentioned tar groove.
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| CN110655960A (en) * | 2019-10-09 | 2020-01-07 | 陕西煤业化工集团神木天元化工有限公司 | Pyrolysis oil gas treatment process and device |
| CN110872523A (en) * | 2018-08-30 | 2020-03-10 | 浙江骐骥环境科技有限公司 | Thermal decomposition system and thermal decomposition process method for refuse derived fuel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110872523A (en) * | 2018-08-30 | 2020-03-10 | 浙江骐骥环境科技有限公司 | Thermal decomposition system and thermal decomposition process method for refuse derived fuel |
| CN110655960A (en) * | 2019-10-09 | 2020-01-07 | 陕西煤业化工集团神木天元化工有限公司 | Pyrolysis oil gas treatment process and device |
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