CN102527186A - Technology and system for recycling solvent oil from oil gas of butadiene prepared from butane under oxidative dehydrogenation effect - Google Patents
Technology and system for recycling solvent oil from oil gas of butadiene prepared from butane under oxidative dehydrogenation effect Download PDFInfo
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Abstract
The invention relates to a technology and a system for recycling solvent oil from oil gas of butadiene prepared from butane under an oxidative dehydrogenation effect. The technology comprises the following steps: 1) utilizing a fine oil gas filter to filter a catalyst in the oil gas and utilizing an oil gas cooler to cool the oil gas; 2) causing the cooled oil gas to enter into an adsorption/desorption device, adsorbing the solvent oil in the oil gas, and desorbing after fully adsorbing, thereby obtaining desorbed gas of the solvent oil; and 3) separating the solvent oil from the desorbed gas of the solvent oil by utilizing a separating jar, recycling and reusing. The recycling system comprises a preprocessing system, an adsorption/desorption system and a recycling device, wherein the adsorption/desorption system is capable of alternately adsorbing and desorbing or adsorbing, desorbing and drying. The technology has the advantages that the technology is simple; the operation is convenient; the recycling rate of the solvent oil is high; the emission concentration of the oil gas is low; the potential safety hazard is eliminated; the emission load of the oil gas is controlled; the clean production, energy saving and environmental protection are realized; the whole recycling process is continuous; the adsorption efficiency is increased; the solvent oil is recycled from the oil gas; the solvent oil is reused; and the production cost of the butadiene is saved.
Description
Technical field
The present invention relates to solvent oil recovering process and system in a kind of butylene oxidation-dehydrogenation system butadiene oil gas.
Background technology
Butadiene is to be used to produce elastomeric important source material, and for the raw material production synthetic rubber accounts for more than 80% of synthetic rubber total output, along with the increase of rubber demand, the market demand of butadiene enlarges rapidly with the butadiene.
Butylene oxidation-dehydrogenation is one of main method of producing butadiene; But absorb cat head in dehydrogenation unit and can produce a large amount of oil gas; The main component of oil gas is water, nitrogen, oxygen, carbon monoxide, carbon dioxide, dimethyl pentane, trimethylpentane and n-hexane, contains the solvent naphtha on a large amount of butadiene dehydrogenation unit absorption tower.Existing oil gas processing mode has two kinds: a kind of is directly to be discharged in the atmosphere, and another kind is to be discharged in the atmosphere behind the nitrogen that reclaims in the oil gas, and the nitrogen after reclaiming is as the thick nitrogen in the commercial production.These two kinds of methods are contaminated environment not only, is detrimental to health, and also can produce potential safety hazard simultaneously, and cause energy waste.
Summary of the invention
The technical problem that the present invention will solve provides and a kind ofly reduces environmental pollution, eliminates safe hidden trouble, reduces solvent oil recovering process and system in the butylene oxidation-dehydrogenation system butadiene oil gas of energy waste.
Technical solution of the present invention is:
Solvent oil recovering process in a kind of butylene oxidation-dehydrogenation system butadiene oil gas, its concrete steps are following:
1) oil gas preliminary treatment
Adopt the oil gas accurate filter to filter the catalyst in the oil gas, and oil gas is lowered the temperature with the oil gas cooler;
2) absorption and desorption
The oil gas of cooling gets into absorption/desorption equipment, and described absorption/desorption equipment comprises that at least two are assembled with the absorber of adsorbent, and solvent naphtha in the adsorbents adsorb oil gas adsorbs and carries out desorption after saturated, must solvent naphtha desorption gas;
3) reclaim
Solvent naphtha desorption gas is isolated solvent naphtha through knockout drum, recycling.
Solvent oil recovering process in the above-mentioned butylene oxidation-dehydrogenation system butadiene oil gas, described adsorbent are a kind of in active carbon, silica gel, the carbon fiber.
Solvent oil recovering process in the above-mentioned butylene oxidation-dehydrogenation system butadiene oil gas utilizes vavuum pump to form the negative-pressure vacuum desorption when desorption, and absorption/desorption equipment comprises two groups of absorbers, and two groups of absorbers hocket and adsorb and desorption; Solvent naphtha desorption gas gets into knockout drum and carries out gas-liquid separation; Liquid is discharged from the knockout drum lower part outlet; To be solvent naphtha gas enter into the solvent naphtha absorption tower from the top outlet of knockout drum to gas, and solvent naphtha absorbs Tata base solvent oil and after the cooling of solvent naphtha recirculation cooler, sends agent oil-absorption tower cat head through the solvent naphtha circulating pump back to, cat head by the solvent naphtha after lowering the temperature with get into solvent naphtha absorption tower solvent naphtha gas and meet; Cold and hot exchange solvent naphtha liquid; Flow at the bottom of the tower, between solvent naphtha recirculation cooler and solvent naphtha circulating pump, be provided with and extract mouth out, solvent naphtha is evacuated to recovery tower.
Solvent oil recovering process in the above-mentioned butylene oxidation-dehydrogenation system butadiene oil gas; When desorption, utilize steam to carry out the steam desorption, absorption/desorption equipment comprises three groups of absorbers, three groups of absorbers hocket absorption, desorption and drying; Solvent naphtha in the oil gas of cooling gets Purge gas after being adsorbed agent absorption; Purge gas gets into drying air fan through pipeline, and the adsorbent after utilizing the Purge gas that gets in the drying air fan to desorption carries out drying, and dried gas drains into atmosphere; Solvent naphtha desorption gas gets into condensation in the desorption gas condenser; The desorption gas of condensation gets in the gun barrel and utilizes the immiscible character of water and solvent naphtha to separate; The directly dehydration bag discharge of the water of lower floor from the gun barrel bottom; The solvent on upper strata is transported to the solvent naphtha dehydrating tower through the solvent oil pump with solvent naphtha, and the gas at solvent naphtha dehydrating tower top gets into the solvent naphtha return tank through the solvent naphtha condenser and carries out separating of solvent naphtha and water, and water is discharged from the dehydration bag of solvent naphtha return tank; Solvent naphtha is sent circulation purification in the solvent naphtha dehydrating tower back to through the solvent naphtha reflux pump; The purification solvent naphtha is recycled to the solvent naphtha recovery tower at the bottom of tower, adopt the moisture of the dry desorbing agent of purified gas, makes full use of the energy and has improved the purification efficiency of installing effectively.
Solvent naphtha recovery system in a kind of butylene oxidation-dehydrogenation system butadiene oil gas; Comprise pretreatment system, absorption/desorption system and recovery system; Its special character is: said pretreatment system comprises oil gas accurate filter and oil gas cooler; Said absorption/desorption system comprises that vavuum pump and two is assembled with the absorber of adsorbent, and two groups of absorbers cooperate vavuum pump to hocket and adsorb and desorption; Said retracting device comprise knockout drum, solvent naphtha absorption tower, with the solvent naphtha circulating pump that is connected at the bottom of solvent naphtha absorbs Tata; Be arranged on the solvent naphtha recirculation cooler between solvent naphtha circulating pump and the solvent naphtha absorption tower cat head, between solvent naphtha recirculation cooler and solvent naphtha circulating pump, be provided with and extract mouth out.
Solvent naphtha recovery system in a kind of butylene oxidation-dehydrogenation system butadiene oil gas; Comprise pretreatment system, absorption/desorption system and retracting device; Its special character is: said pretreatment system comprises oil gas accurate filter and oil gas cooler; Said absorption/desorption system comprises that drying air fan and three is assembled with the absorber of adsorbent, and three groups of absorbers cooperate drying air fans can hocket absorption, desorption, drying; Said retracting device comprises desorption gas condenser, knockout drum, solvent oil pump, solvent naphtha dehydrating tower; Be separately positioned on the solvent naphtha condenser and the solvent naphtha reflux pump of solvent naphtha dehydration column overhead, between solvent naphtha condenser and solvent naphtha reflux pump, be provided with the solvent naphtha return tank.
The invention has the beneficial effects as follows:
(1) technology is simple, easy and simple to handle, the solvent naphtha rate of recovery high, exhaust of oil concentration is low, has eliminated potential safety hazard, and the discharge capacity of control oil gas realizes cleaner production, energy-conserving and environment-protective.
(2) adopt oil gas cooler cooling oil gas, the solvent naphtha in the oil gas is adsorbed in adsorbent more easily.
(3) adopt the absorption that hockets of many group absorbers, having guaranteed that adsorption process is continual carries out, and makes that the whole recovery process is continuous, has improved adsorption efficiency.
(4) from oil gas, reclaim solvent naphtha, solvent naphtha is recycled, practiced thrift the production cost of butadiene.
Description of drawings
Fig. 1 is the recovery system sketch map of vacuum desorption of the present invention;
Fig. 2 is the recovery system sketch map of steam desorption of the present invention;
Among the figure: the I-pretreatment system: 1-oil gas accurate filter, 2-oil gas cooler; II-absorption/desorption system: 3-absorption/desorption equipment, 301-absorber I, 302-absorber II, 303-absorber III, 4-vavuum pump; III-recovery system: 5-knockout drum, 6-solvent naphtha absorption tower, 7-solvent naphtha circulating pump, 8-solvent naphtha recirculation cooler; The 9-drying air fan; 10-desorption gas condenser, 11-gun barrel, 12-solvent oil pump, 13-solvent naphtha dehydrating tower, 14-solvent naphtha condenser, 15-solvent naphtha return tank, 16-solvent naphtha reflux pump.
The specific embodiment
Embodiment 1
As shown in Figure 1, solvent naphtha vacuum desorption recovery system in this butylene oxidation-dehydrogenation system butadiene oil gas comprises pretreatment system I, absorption/II of desorption system and retracting device III.Described pretreatment system I comprises oil gas accurate filter 1 and oil gas cooler 2; Said absorption/II of desorption system comprises absorption/desorption equipment 3 and vavuum pump 4, and absorption/desorption equipment 3 is made up of interior absorber I301, the absorber II302 that establishes adsorbent, absorber I301, absorber II302 cooperation vavuum pump 4 can hocket absorption, desorption; Said retracting device III comprises knockout drum 5; Solvent naphtha absorption tower 6; With the solvent naphtha circulating pump 7 that is connected at the bottom of 6 towers of solvent naphtha absorption tower; Be arranged on the solvent naphtha recirculation cooler 8 between solvent naphtha circulating pump 7 and solvent naphtha absorption tower 6 cats head, between solvent naphtha recirculation cooler 8 and solvent naphtha circulating pump 7, be provided with and extract mouth out.
Solvent naphtha vacuum desorption recovery technology concrete steps are following in this butylene oxidation-dehydrogenation system butadiene oil gas:
1) pretreatment system I carries out preliminary treatment
The oil gas that butylene oxidation-dehydrogenation system butadiene dehydrogenation unit absorbs tower top discharge gets into oil gas accurate filter 1 and filters catalyst granules in the oil gas, gets into the oil gas cooler 2 of making cooling medium with recirculated water then and makes the oil gas cooling.
2) II of absorption/desorption system adsorbs and desorption
The oil gas of cooling gets into absorption/desorption equipment 3 of being made up of the absorber I301 that acticarbon is housed, absorber I302, and the import magnetic valve that absorber I301 is corresponding is opened, and adsorbs in the absorber I301 that oil gas at first gets into; Solvent naphtha in the oil gas is got Purge gas by charcoal absorption; Purge gas directly enters atmosphere, after the charcoal absorption solvent naphtha is saturated, and the import closed electromagnetic valve that absorber I301 is corresponding; The outlet magnetic valve that absorber I301 is corresponding is opened; Vavuum pump 4 forms negative pressure and carries out vacuum desorption solvent naphtha desorption from active carbon is come out, solvent naphtha desorption gas, during absorber I301 desorption; The corresponding import magnetic valve of absorber II302 is opened; Oil gas continue to get in the absorber II302 that acticarbon is housed and adsorbs, and makes absorber I301, absorber II302 hocket absorption, desorption through solenoid control, obtains the opening and closing that the saturated required time of charcoal absorption solvent naphtha is set magnetic valve according to the flow of oil gas.
3) recovery system III reclaims
Solvent naphtha desorption gas gets into knockout drum 5 and carries out gas-liquid separation; Liquid is discharged from knockout drum 5 lower part outlets; To be solvent naphtha gas enter into solvent naphtha absorption tower 6 from the top outlet of knockout drum 5 to gas, and solvent naphtha absorption tower 6 tower base solvent oil are sent agent oil-absorption tower 6 cats head through solvent naphtha circulating pump 7 back to after 8 coolings of solvent naphtha recirculation cooler, cat head by the solvent naphtha after lowering the temperature with get into solvent naphtha absorption tower 6 solvent naphtha gases and meet; Cold and hot exchange solvent naphtha liquid; Flow at the bottom of the tower, between solvent naphtha recirculation cooler 8 and solvent naphtha circulating pump 9, be provided with and extract mouth out, solvent naphtha is evacuated to recovery tower.
In the oil gas of dehydrogenation unit absorption tower tower top discharge, causing the loss of solvent naphtha is 660kg/h in existing 100,000 tons of/year butylene oxidation-dehydrogenation system butadiene projects, sets up in the oil gas of present embodiment after the solvent naphtha recovery system; The yield of solvent naphtha is 600kg/h; The loss of solvent naphtha is reduced to 60kg/h, and the annual solvent naphtha that reclaims can reach 4800t, greatly reduces the discharge capacity of oil gas; Energy-conserving and environment-protective have realized cleaner production.
Embodiment 2
Adsorbent among the embodiment 1 is replaced to carbon fiber, and technical process is with embodiment 1.
Adsorbent among the embodiment 1 is replaced to silica gel, and technical process is with embodiment 1.
Embodiment 4
As shown in Figure 2; Oil gas steam desorption recovery solvent naphtha system comprises pretreatment system I, absorption/II of desorption system and retracting device III in this butadiene production; Described pretreatment system I comprises oil gas accurate filter 1 and oil gas cooler 2; Said absorption/II of desorption system comprises absorption/desorption equipment 3 and drying air fan 9; Adsorption/desorption equipment is made up of absorber I301, absorber I302, the absorber III303 of interior dress adsorbent, cooperates drying air fan 9 can hocket absorption, desorption, drying.Said retracting device III comprises desorption gas condenser 10; Gun barrel 11; Solvent oil pump 12; Solvent naphtha dehydrating tower 13 is contained in the solvent naphtha condenser 14 and solvent naphtha reflux pump 15 of solvent naphtha dehydrating tower 13 cats head respectively, is located at the solvent naphtha return tank 16 between solvent naphtha condenser 14 and the solvent naphtha reflux pump 15.
Oil gas steam desorption recovery solvent naphtha technology concrete steps are following in this butadiene production:
1) pretreatment system I carries out preliminary treatment
Butylene oxidation-dehydrogenation system butadiene dehydrogenation unit absorbs oil gas that cat head produces and gets into oil gas accurate filter 1 and filter catalyst granules in the oil gas, gets into the oil gas cooler 2 of making cooling medium with recirculated water then and makes the oil gas cooling.
2) II of absorption/desorption system adsorbs and desorption
The oil gas of cooling gets into absorption/desorption equipment 3 of being made up of the absorber I301 that acticarbon is housed, absorber II302, absorber III303; The import magnetic valve that absorber I301 is corresponding is opened, and oil gas at first gets in the absorber I301 and adsorbs, and the solvent naphtha in the oil gas is got Purge gas by charcoal absorption; Purge gas gets into drying air fan 9 through pipeline; After the charcoal absorption solvent naphtha is saturated, the import closed electromagnetic valve that absorber I301 is corresponding, the outlet magnetic valve that absorber I301 is corresponding is opened; Utilize steam that solvent naphtha is carried out the steam desorption from active carbon, get solvent naphtha desorption gas; During absorber I301 desorption; The import magnetic valve that absorber II302 is corresponding is opened, and oil gas continues to get in the absorber II302 and adsorbs, among the absorber II302 charcoal absorption solvent naphtha saturated after; The import closed electromagnetic valve that absorber II302 is corresponding; The outlet magnetic valve that absorber II302 is corresponding is opened, and utilizes steam that solvent naphtha is carried out the steam desorption from active carbon, gets solvent naphtha desorption gas; During absorber II302 desorption; The import magnetic valve that absorber III303 is corresponding is opened; Oil gas continues to adsorb in the entering absorber III303; Absorber I301 utilize to get into Purge gas in the drying air fan 9 active carbon after to desorption and carries out drying; Dried gas drains into atmosphere, makes absorber I301, absorber II302, absorber III303 hocket absorption, desorption, drying through solenoid control, obtains the opening and closing that the saturated required time of charcoal absorption solvent naphtha is set magnetic valve according to the flow of oil gas.
3) recovery system III reclaims
Solvent naphtha desorption gas gets into condensation in the desorption gas condenser 10; The desorption gas of condensation gets in the gun barrel 11 and utilizes the immiscible character of water and solvent naphtha to separate; The directly dehydration bag discharge of the water of lower floor from gun barrel 11 bottoms; The solvent on upper strata is transported to solvent naphtha dehydrating tower 13 through solvent oil pump 12 with solvent naphtha, and the gas at solvent naphtha dehydrating tower 13 tops gets into solvent naphtha return tank 15 through solvent naphtha condenser 14 and carries out separating of solvent naphtha and water, and water is discharged from the dehydration bag of solvent naphtha return tank 15; Solvent naphtha is sent circulation purification in the solvent naphtha dehydrating tower 13 back to through solvent naphtha reflux pump 16, and the purification solvent naphtha is recycled to the solvent naphtha recovery tower at the bottom of tower.
In the oil gas of dehydrogenation unit absorption tower tower top discharge, causing the loss of solvent naphtha is 660kg/h in existing 100,000 tons of/year butylene oxidation-dehydrogenation system butadiene projects, has increased in the oil gas of present embodiment after the solvent naphtha recovery system; The yield of solvent naphtha is 600kg/h; The loss of solvent naphtha is reduced to 60kg/h, and the annual solvent naphtha that reclaims can reach 4800t, greatly reduces the discharge capacity of oil gas; Energy-conserving and environment-protective have realized cleaner production.
Embodiment 5
Adsorbent among the embodiment 4 is replaced to carbon fiber, and technical process is with embodiment 4.
Embodiment 6
Adsorbent among the embodiment 4 is replaced to silica gel, and technical process is with embodiment 4.
Claims (6)
1. solvent oil recovering process in the butylene oxidation-dehydrogenation system butadiene oil gas is characterized in that step is following:
1) oil gas preliminary treatment
Adopt the oil gas accurate filter to filter the catalyst in the oil gas, and oil gas is lowered the temperature with the oil gas cooler;
2) absorption and desorption
The oil gas of cooling gets into absorption/desorption equipment, and described absorption/desorption equipment comprises that at least two are assembled with the absorber of adsorbent, and solvent naphtha in the adsorbents adsorb oil gas adsorbs and carries out desorption after saturated, must solvent naphtha desorption gas;
3) reclaim
Solvent naphtha desorption gas is isolated solvent naphtha through knockout drum, recycling.
2. solvent oil recovering process in the butylene oxidation-dehydrogenation system butadiene oil gas according to claim 1 is characterized in that: described adsorbent is a kind of in active carbon, silica gel, the carbon fiber.
3. solvent oil recovering process in the butylene oxidation-dehydrogenation system butadiene oil gas according to claim 1; It is characterized in that: when desorption, utilize vavuum pump to form the negative-pressure vacuum desorption; Absorption/desorption equipment comprises two groups of absorbers, and two groups of absorbers hocket and adsorb and desorption; Solvent naphtha desorption gas gets into knockout drum and carries out gas-liquid separation; Liquid is discharged from the knockout drum lower part outlet; To be solvent naphtha gas enter into the solvent naphtha absorption tower from the top outlet of knockout drum to gas, and solvent naphtha absorbs Tata base solvent oil and after the cooling of solvent naphtha recirculation cooler, sends agent oil-absorption tower cat head through the solvent naphtha circulating pump back to, cat head by the solvent naphtha after lowering the temperature with get into solvent naphtha absorption tower solvent naphtha gas and meet; Cold and hot exchange solvent naphtha liquid; Flow at the bottom of the tower, between solvent naphtha recirculation cooler and solvent naphtha circulating pump, be provided with and extract mouth out, solvent naphtha is evacuated to recovery tower.
4. solvent oil recovering process in the butylene oxidation-dehydrogenation system butadiene oil gas according to claim 1; It is characterized in that: when desorption, utilize steam to carry out the steam desorption; Absorption/desorption equipment comprises three groups of absorbers; Three groups of absorbers hocket absorption, desorption and drying, the solvent naphtha in the oil gas of cooling be adsorbed after the agent absorption Purge gas, Purge gas gets into drying air fan through pipeline; Utilize to get into Purge gas in the drying air fan adsorbent after to desorption and carry out drying, dried gas drains into atmosphere; Solvent naphtha desorption gas gets into condensation in the desorption gas condenser; The desorption gas of condensation gets in the gun barrel and utilizes the immiscible character of water and solvent naphtha to separate; The directly dehydration bag discharge of the water of lower floor from the gun barrel bottom; The solvent on upper strata is transported to the solvent naphtha dehydrating tower through the solvent oil pump with solvent naphtha, and the gas at solvent naphtha dehydrating tower top gets into the solvent naphtha return tank through the solvent naphtha condenser and carries out separating of solvent naphtha and water, and water is discharged from the dehydration bag of solvent naphtha return tank; Solvent naphtha is sent circulation purification in the solvent naphtha dehydrating tower back to through the solvent naphtha reflux pump, and the purification solvent naphtha is recycled to the solvent naphtha recovery tower at the bottom of tower.
5. solvent naphtha recovery system in the butylene oxidation-dehydrogenation system butadiene oil gas; Comprise pretreatment system, absorption/desorption system and retracting device; It is characterized in that: said pretreatment system comprises oil gas accurate filter and oil gas cooler; Said absorption/desorption system comprises that vavuum pump and two is assembled with the absorber of adsorbent, and two groups of absorbers cooperate vavuum pump to hocket and adsorb and desorption; Said retracting device comprise knockout drum, solvent naphtha absorption tower, with the solvent naphtha circulating pump that is connected at the bottom of solvent naphtha absorbs Tata; Be arranged on the solvent naphtha recirculation cooler between solvent naphtha circulating pump and the solvent naphtha absorption tower cat head, between solvent naphtha recirculation cooler and solvent naphtha circulating pump, be provided with and extract mouth out.
6. solvent naphtha recovery system in the butylene oxidation-dehydrogenation system butadiene oil gas; Comprise pretreatment system, absorption/desorption system and retracting device; It is characterized in that: said pretreatment system comprises oil gas accurate filter and oil gas cooler; Said absorption/desorption system comprises that drying air fan and three is assembled with the absorber of adsorbent, and three groups of absorbers cooperate drying air fans can hocket absorption, desorption, drying; Said retracting device comprises desorption gas condenser, knockout drum, solvent oil pump, solvent naphtha dehydrating tower; Be separately positioned on the solvent naphtha condenser and the solvent naphtha reflux pump of solvent naphtha dehydration column overhead, be arranged on the solvent naphtha return tank between solvent naphtha condenser and the solvent naphtha reflux pump.
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| CN111825516A (en) * | 2019-04-19 | 2020-10-27 | 惠生工程（中国）有限公司 | Separation system and separation method of crude butadiene |
| CN111825516B (en) * | 2019-04-19 | 2023-04-28 | 惠生工程（中国）有限公司 | Separation system and separation method of crude butadiene |
| CN111437691A (en) * | 2020-04-01 | 2020-07-24 | 安徽晋煤中能化工股份有限公司 | Organic waste gas treatment method for producing hydrogen peroxide by anthraquinone process |
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