CN103980952B - Band retort section list outlet gas producer gas purification cooling and oily water separation technique - Google Patents
Band retort section list outlet gas producer gas purification cooling and oily water separation technique Download PDFInfo
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- CN103980952B CN103980952B CN201410233443.5A CN201410233443A CN103980952B CN 103980952 B CN103980952 B CN 103980952B CN 201410233443 A CN201410233443 A CN 201410233443A CN 103980952 B CN103980952 B CN 103980952B
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Abstract
The present invention relates to a kind of producer gas generator purification cooling and oily water separation technique, particularly the retort section list outlet gas producer gas purification cooling of a kind of band and oily water separation technique.Producer gas generator top arranges quantitatively spray pressure dirt device, coal gas enters gas washing temperature-reducing tower after entering oily water separation evaporator tower again, the coal gas that electrostatic tar remover removes tar removing and dust enters indirect cooler, oil-water mixture is circulating cooling coal gas in gas washing temperature-reducing tower, water in mixed solution is constantly entered coal gas by evaporation, when the tar ratio in oil mixing with water pond accounts for after 50% of mixed solution mass ratio, import oily water separation storage pond; Oil-water mixture in oily water separation storage pond imports oily water separation tower, and with the coal gas of high temperature recuperated cycle in oily water separation tower, the tar water ratio in oil-water mixture constantly reduces; By pump, tar is imported in tar storage tank.The present invention can reduce the dust content of tar; Utilize gas heat to realize tar to be fully separated with water, thus reduce tar water ratio.
Description
Technical field
The present invention relates to a kind of producer gas generator purification cooling and oily water separation technique, particularly the retort section list outlet gas producer gas purification cooling of a kind of band and oily water separation technique.
Background technology
Current gas producer gas station many employings gas purification and cooling process of two stage type gas generating furnace, its technical process is as Fig. 1.
Gas in upper segment enters electrostatic tar remover and carries out purifying and dedusting, tar removing process, by the most tar in coal gas and dust removing, then enters indirect cooler;
Hypomere coal gas by big dust particle removing in coal gas through gravitational precipitator, enters waste-heat recoverer, is utilized by coal gas high-temperature Exposure degree, reduce gas temperature, then enter air cooler, enter indirect cooler again after utilizing outside air to lower the temperature to coal gas;
Gas in upper segment and hypomere coal gas carry out degree of depth cooling process after entering indirect cooler mixing simultaneously;
Then coal gas enters electrostatic again except light oil device, the mechanical water droplet in coal gas and light oil droplet is caught and removes;
Coal gas desulfurization station or user is pressed and delivered to finally by coal gas supercharging equipment.
There is following problem in this gas purification and cooling process:
(1) producer gas generator top larger particles coal grain and thinner coal dust are carried by the air-flow of gas in upper segment, be mixed in tar, increase the dust content in tar in electrostatic tar remover after being caught to remove.
(2) moisture more in gas in upper segment, after entering electrostatic tar remover, most water is separated out in coal gas, by electrostatic tar remover catch remove after be mixed in tar, cause tar water content comparatively large, this technique cannot realize being separated of tar and water.
Summary of the invention
The object of the invention is to the deficiency overcoming background technology, and the one band retort section list outlet gas producer gas purification cooling provided and oily water separation technique.
The present invention adopts following technical scheme:
The retort section list outlet gas producer gas purification cooling of a kind of band and oily water separation technique, carry out as follows:
A, band retort section list outlet gas producer top arrange quantitatively spray pressure dirt device, after the coal dust that the maximum material size that as-fired coal carries is less than 3mm is squirted, be attached to coal cinder surface, effectively prevent stove and go out coal gas and carry problem compared with fine dust, first time cooling is carried out to coal gas simultaneously;
B, stove go out first the maximum material size carried in coal gas is greater than 0.5mm by coal gas granule dust removing through gravitational precipitator;
C, coal gas enter oily water separation evaporator tower, utilize gas heat that the water needed in the tar of oily water separation evaporation is entered coal gas, tar is fully separated with water, carry out second time cooling simultaneously to coal gas;
D, then coal gas enter gas washing temperature-reducing tower again, utilize water coolant to lower the temperature to coal gas, make to account for gas quality in coal gas than after the tar condensing of more than 65% simultaneously, together enter oil mixing with water pond with water coolant, carry out third time cooling to coal gas simultaneously;
E, coal gas obtain deep purifying after entering electrostatic tar remover, further remaining tar and dust in removing coal gas;
F, enter indirect cooler through electrostatic tar remover except the coal gas of tar removing and dust, coal gas is carried out to the 4th cooling down of the more degree of depth;
G, coal gas enter electrostatic except light oil device, the water droplet in coal gas and light oil droplet are caught and remove;
H, be pressed and delivered to coal gas desulfurization station or user finally by coal gas supercharging equipment;
I, through electrostatic tar remover catch the tar that removes and gas washing temperature-reducing tower first under tar collect and enter oil mixing with water pond and collect, the oil-water mixture in oil mixing with water pond is sent to gas washing temperature-reducing tower as circulatory mediator; Along with oil-water mixture continuous circulating cooling coal gas in gas washing temperature-reducing tower, water in mixed solution is constantly entered coal gas by evaporation, and tar in coal gas constantly by gas washing temperature-reducing tower and electrostatic tar remover catch remove after be mixed in mixed solution, when the tar ratio in oil mixing with water pond accounts for after 50% of mixed solution mass ratio, by the first transferpump, the mixed solution in oil mixing with water pond is imported oily water separation and store up pond;
Oil-water mixture in j, oily water separation storage pond delivers to oily water separation tower by the second transferpump, and circulate with the coal gas of high temperature direct contact heat transfer in oily water separation tower, water in working cycle in oil-water mixture is evaporated in coal gas gradually, and the tar water ratio in oil-water mixture constantly reduces; After tar water ratio is lower than 5%, first tar is imported in tar storage tank by the second transferpump; After tar is imported tar storage tank by the second transferpump, the oil-water mixture in oil mixing with water pond imports oily water separation storage pond by the first transferpump again, and oily water separation storage pond is repeated above separating step and proceeded oily water separation.
Adopt the present invention of technique scheme compared with prior art to have the following advantages: the larger particles dust carried in coal gas can be removed, significantly reduce the dust content in by-product tar; Utilize gas heat that the water needed in the tar of oily water separation evaporation is entered coal gas, tar is fully separated with water, thus reaches the object reducing tar water ratio.
Preferred version of the present invention is:
Coal gas first time cools to 250 DEG C ~ 350 DEG C.
Coal gas second time cools to 100 DEG C ~ 150 DEG C.
Coal gas third time cools to 80 DEG C ~ 120 DEG C.
Coal gas cools to 35 DEG C ~ 50 DEG C the 4th time.
For ensureing that gas washing temperature-reducing tower is to the cooling-down effect of coal gas, oil mixing with water pond needs regular moisturizing.
Moisturizing is needed during oily water separation storage pond repeated isolation step.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of prior art.
Fig. 2 is structural representation of the present invention.
Embodiment
Below in conjunction with drawings and Examples in detail the present invention is described in detail:
The retort section list outlet gas producer gas purification cooling of a kind of band and oily water separation technique, see the schema shown in accompanying drawing 2.
In the present embodiment, band retort section list outlet gas producer top arranges quantitatively spray pressure dirt device, after the coal dust that the maximum material size that as-fired coal carries is less than 3mm is squirted, be attached to coal cinder surface, outside avoiding being come out of the stove by Gas Flow band, thus effectively prevent stove and go out coal gas and carry problem compared with fine dust, first time cooling is carried out to coal gas simultaneously; Coal gas first time cools to 250 DEG C ~ 350 DEG C.
Stove goes out first the maximum material size carried in coal gas is greater than 0.5mm by coal gas granule dust removing through gravitational precipitator.
Coal gas enters oily water separation evaporator tower, utilizes gas heat that the water needed in the tar of oily water separation evaporation is entered coal gas, tar is fully separated with water, thus reaches the object reducing tar water ratio, carry out second time cooling simultaneously to coal gas; Coal gas second time cools to 100 DEG C ~ 150 DEG C.
Then coal gas enters gas washing temperature-reducing tower again, utilizes water coolant to lower the temperature to coal gas, makes to account for gas quality in coal gas than after the tar condensing of more than 65% simultaneously, together enters oil mixing with water pond with water coolant, carries out third time cooling to coal gas simultaneously; Coal gas third time cools to 80 DEG C ~ 120 DEG C.
Coal gas obtains deep purifying after entering electrostatic tar remover, further remaining tar and dust in removing coal gas.
Enter indirect cooler through electrostatic tar remover except the coal gas of tar removing and dust, coal gas is carried out to the 4th cooling down of the more degree of depth; Coal gas cools to 35 DEG C ~ 50 DEG C the 4th time.
Next step, coal gas enters electrostatic except light oil device, the mechanical water droplet in coal gas and light oil droplet is caught and removes;
Coal gas desulfurization station or user is pressed and delivered to finally by coal gas supercharging equipment;
Through electrostatic tar remover catch the tar that removes and gas washing temperature-reducing tower first under tar collect and enter oil mixing with water pond and collect, for ensureing that gas washing temperature-reducing tower is to the cooling-down effect of coal gas, oil mixing with water pond needs regular moisturizing; Oil-water mixture in oil mixing with water pond is sent to gas washing temperature-reducing tower as circulatory mediator; Along with oil-water mixture continuous circulating cooling coal gas in gas washing temperature-reducing tower, water in oil-water mixture is constantly entered coal gas by evaporation, and tar in coal gas constantly by gas washing temperature-reducing tower and electrostatic tar remover catch remove after be mixed in mixed solution, when the tar ratio in oil mixing with water pond accounts for after 50% of mixed solution mass ratio, by the first transferpump, the mixed solution in oil mixing with water pond is imported oily water separation and store up pond.
Oil-water mixture in oily water separation storage pond delivers to oily water separation tower by the second transferpump, and circulate with the coal gas of high temperature direct contact heat transfer in oily water separation tower, water in working cycle in oil-water mixture is evaporated in coal gas gradually, and the tar water ratio in oil-water mixture constantly reduces; After tar water ratio is lower than 5%, first tar is imported in tar storage tank by the second transferpump; After tar is imported tar storage tank by the second transferpump, and then the oil-water mixture in oil mixing with water pond is imported oily water separation storage pond by the first transferpump, now, oil mixing with water pond needs moisturizing again, and oily water separation storage pond is repeated above separating step and proceeded oily water separation.
First the present embodiment, can realize significantly reducing the dust content in by-product tar; And do not utilize external heat source, only utilize gas heat to be evaporated gradually by the water needed in the tar of oily water separation and enter coal gas, tar is fully separated with water, thus reach the object reducing tar water ratio; Before simultaneously coal gas enters indirect cooler, first carry out high efficiencyly catching tar removing and dust, thus effectively prevent the latch up phenomenon of indirect cooler.
Claims (7)
1. be with retort section list outlet gas producer gas purification cooling and an oily water separation technique, carry out as follows:
A, band retort section list outlet gas producer top arrange quantitatively spray pressure dirt device, after the coal dust that the maximum material size that as-fired coal carries is less than 3mm is squirted, be attached to coal cinder surface, effectively prevent stove and go out coal gas and carry problem compared with fine dust, first time cooling is carried out to coal gas simultaneously;
B, stove go out first the maximum material size carried in coal gas is greater than 0.5mm by coal gas granule dust removing through gravitational precipitator;
C, coal gas enter oily water separation evaporator tower, utilize gas heat that the water needed in the tar of oily water separation evaporation is entered coal gas, tar is fully separated with water, carry out second time cooling simultaneously to coal gas;
D, then coal gas enter gas washing temperature-reducing tower again, utilize water coolant to lower the temperature to coal gas, make to account for gas quality in coal gas than after the tar condensing of more than 65% simultaneously, together enter oil mixing with water pond with water coolant, carry out third time cooling to coal gas simultaneously;
E, coal gas obtain deep purifying after entering electrostatic tar remover, further remaining tar and dust in removing coal gas;
F, enter indirect cooler through electrostatic tar remover except the coal gas of tar removing and dust, coal gas is carried out to the 4th cooling down of the more degree of depth;
G, coal gas enter electrostatic except light oil device, the water droplet in coal gas and light oil droplet are caught and remove;
H, be pressed and delivered to coal gas desulfurization station or user finally by coal gas supercharging equipment;
I, through electrostatic tar remover catch the tar that removes and gas washing temperature-reducing tower first under tar collect and enter oil mixing with water pond and collect, the oil-water mixture in oil mixing with water pond is sent to gas washing temperature-reducing tower as circulatory mediator; Along with oil-water mixture continuous circulating cooling coal gas in gas washing temperature-reducing tower, water in oil-water mixture is constantly entered coal gas by evaporation, and tar in coal gas constantly by gas washing temperature-reducing tower and electrostatic tar remover catch remove after be mixed in oil-water mixture, when the tar ratio in oil mixing with water pond accounts for after 50% of oil-water mixture mass ratio, by the first transferpump, the oil-water mixture in oil mixing with water pond is imported oily water separation and store up pond;
Oil-water mixture in j, oily water separation storage pond delivers to oily water separation evaporator tower by the second transferpump, and circulate with the coal gas of high temperature direct contact heat transfer in oily water separation evaporator tower, water in working cycle in oil-water mixture is evaporated in coal gas gradually, and the tar water ratio in oil-water mixture constantly reduces; After tar water ratio is lower than 5%, first tar is imported in tar storage tank by the second transferpump; After tar is imported tar storage tank by the second transferpump, the oil-water mixture in oil mixing with water pond imports oily water separation storage pond by the first transferpump again, and oily water separation storage pond is repeated above separating step and proceeded oily water separation.
2. band retort section list outlet gas producer gas purification cooling according to claim 1 and oily water separation technique, is characterized in that: coal gas first time cools to 250 DEG C ~ 350 DEG C.
3. band retort section list outlet gas producer gas purification cooling according to claim 1 and oily water separation technique, is characterized in that: coal gas second time cools to 100 DEG C ~ 150 DEG C.
4. band retort section list outlet gas producer gas purification cooling according to claim 1 and oily water separation technique, is characterized in that: coal gas third time cools to 80 DEG C ~ 120 DEG C.
5. band retort section list outlet gas producer gas purification cooling according to claim 1 and oily water separation technique, is characterized in that: coal gas cools to 35 DEG C ~ 50 DEG C the 4th time.
6. band retort section list outlet gas producer gas purification cooling according to claim 1 and oily water separation technique, is characterized in that: for ensureing that gas washing temperature-reducing tower is to the cooling-down effect of coal gas, oil mixing with water pond needs regular moisturizing.
7. band retort section list outlet gas producer gas purification cooling according to claim 1 and oily water separation technique, is characterized in that: need moisturizing during oily water separation storage pond repeated isolation step.
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| GB759493A (en) * | 1952-04-18 | 1956-10-17 | Brennstoff Technik G M B H | Process and equipment for the treatment of gases from low - temperature carbonization, more particularly of coal, utilising electrostatic precipitation |
| JP2004107473A (en) * | 2002-09-18 | 2004-04-08 | Jfe Steel Kk | Method and apparatus for cleaning by-product gas |
| JP5552815B2 (en) * | 2010-01-19 | 2014-07-16 | 株式会社Ｉｈｉ | Tar recovery device |
| CN102146301A (en) * | 2011-02-15 | 2011-08-10 | 王子国 | Method for two-stage coal gasification on composite external heat fixed bed and gas furnace |
| CN202081066U (en) * | 2011-06-09 | 2011-12-21 | 宁波双翼能源科技有限公司 | Production equipment for preparing combustible gas continuously by utilizing biomass fuel |
| CN202427300U (en) * | 2011-09-19 | 2012-09-12 | 无锡湖光工业炉有限公司 | Dust-removal system of biomass gasifier |
| CN103013583B (en) * | 2012-12-05 | 2014-05-21 | 浙江大学 | Process for dust removing, cooling and tar oil recovering of pyrolysis coal gas |
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