CN103980952A - Gas generator with dry distillation section single exit and gas purifying, cooling and oil-water separation process thereof - Google Patents
Gas generator with dry distillation section single exit and gas purifying, cooling and oil-water separation process thereof Download PDFInfo
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- CN103980952A CN103980952A CN201410233443.5A CN201410233443A CN103980952A CN 103980952 A CN103980952 A CN 103980952A CN 201410233443 A CN201410233443 A CN 201410233443A CN 103980952 A CN103980952 A CN 103980952A
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Abstract
The invention relates to a gas generator purifying, cooling and oil-water separation process and in particular relates to a gas generator with a dry distillation section single exit and a gas purifying, cooling and oil-water separation process thereof. A quantitative spraying dust pressing device is arranged at the top of the gas generator, gas enters into an oil-water separation and evaporation tower and then enters into a gas washing cooling tower, tar and dust in the gas are removed by virtue of a static tar remover and then the gas enters into an indirect cooler, an oil-water mixed solution cools the gas in the washing cooling tower in a circulation way, water in the mixed solution is continuously evaporated and enters into the gas, when tar in an oil-water mixed tank accounts for 50% of the mass of the mixed solution, the oil-water mixed solution is introduced into an oil-water separation storage tank; the oil-water mixed solution in the oil-water separation storage tank is introduced into an oil-water separation tower, high temperature gas heat exchange circulation between the oil-water mixed solution and high temperature gas in the oil-water separation tower is carried out, and water content of the tar in the oil-water mixed solution is continuously reduced; the tar is introduced into a tar storage tank by virtue of a pump. By adopting the gas generator with the dry distillation section single exit and the gas purifying, cooling and oil-water separation process thereof, dust content of the tar can be reduced, and complete separation of oil and water can be realized by utilizing sensible heat of the gas, so that the water content of the tar is reduced.
Description
Technical field
The present invention relates to a kind of producer gas generator and purify the cooling and oily water separation technique of cooling and oily water separation technique, the particularly gas purification of a kind of band retort section list outlet gas producer.
Background technology
Gas producer gas station adopts gas purification and cooling process of two stage type gas generating furnace more at present, and its technical process is as Fig. 1.
Gas in upper segment enters electrostatic tar remover and carries out purifying and dedusting, tar removing processing, most tar and dust in coal gas is removed, then entered indirect cooler;
Hypomere coal gas is removed big dust particle in coal gas through gravitational precipitator, enters waste-heat recoverer, and coal gas high-temperature sensible heat is recycled, and reduces gas temperature, then enters air cooler, enters indirect cooler after utilizing outside air to lower the temperature to coal gas again;
Gas in upper segment and hypomere coal gas enter after indirect cooler mixing simultaneously, carry out degree of depth cooling process;
Then coal gas enters static again except light oil device, and the mechanical water droplet in coal gas and light oil droplet are caught and removed;
Finally by coal gas supercharging equipment, be pressed and delivered to coal gas desulfurization station or user.
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, after being caught to remove, sneak in tar in electrostatic tar remover, have increased the dust content in tar.
(2) moisture more in gas in upper segment, enter electrostatic tar remover after most water in coal gas, separate out, by electrostatic tar remover, caught after removing and sneak in tar, cause tar water content larger, this technique cannot realize the separated of tar and water.
Summary of the invention
The object of the invention is to overcome the deficiency of background technology, and a kind of band retort section list outlet gas producer gas purification providing is cooling and oily water separation technique.
The present invention adopts following technical scheme:
Cooling and the oily water separation technique of band retort section list outlet gas producer gas purification, carry out as follows:
A, band retort section list outlet gas producer top arrange quantitative spray and press dirt device, after entering coal dust that maximum material size that stove coal carries is less than 3mm and being squirted, be attached to coal cinder surface, effectively avoided stove to go out coal gas and carried the problem compared with fine dust, coal gas is lowered the temperature for the first time simultaneously;
B, stove go out the granule dust that first coal gas be greater than 0.5mm through gravitational precipitator by the maximum material size carrying in coal gas and remove;
C, coal gas enter oily water separation evaporator tower, utilize gas heat by needing the water evaporation in the tar of oily water separation to enter coal gas, make tar fully separated with water, coal gas are lowered the temperature for the second time simultaneously;
D, then coal gas enters gas washing temperature-reducing tower again, utilizes water coolant to lower the temperature to coal gas, make to account in coal gas simultaneously gas quality than more than 65% tar condensing after, together enter oil mixing with water pond with water coolant, coal gas is lowered the temperature for the third time simultaneously;
E, coal gas obtain deep purifying after entering electrostatic tar remover, further remove tar and dust remaining in coal gas;
F, process electrostatic tar remover, except the coal gas of tar removing and dust enters indirect cooler, carry out more the 4th cooling down of the degree of depth to coal gas;
G, coal gas enter static except light oil device, and the water droplet in coal gas and light oil droplet are caught and removed;
H, finally by coal gas supercharging equipment, be pressed and delivered to coal gas desulfurization station or user;
I, catch the first lower tar collection of the tar that removes and gas washing temperature-reducing tower enter oil mixing with water pond and collect through electrostatic tar remover, 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 evaporated and enters coal gas, and tar in coal gas is constantly caught after removing and is sneaked in mixed solution by gas washing temperature-reducing tower and electrostatic tar remover, tar ratio in oil mixing with water pond account for mixed solution mass ratio 50% after, by the first transferpump, mixed solution in oil mixing with water pond is imported to oily water separation storage pond;
Oil-water mixture in j, oily water separation storage pond is delivered 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%, by the second transferpump, first tar is imported in tar storage tank; After the second transferpump imports tar storage tank by tar, 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: can remove the larger particles dust carrying in coal gas, significantly reduce the dust content in by-product tar; Utilize gas heat by needing the water evaporation in the tar of oily water separation to enter coal gas, make tar fully separated with water, thereby reach the object of reduction tar water ratio.
Preferred version of the present invention is:
Coal gas cools to 250 ℃～350 ℃ for the first time.
Coal gas cools to 100 ℃～150 ℃ for the second time.
Coal gas cools to 80 ℃～120 ℃ for the third time.
Coal gas cools to 35 ℃～50 ℃ for the 4th time.
For guaranteeing the cooling-down effect of gas washing temperature-reducing tower to coal gas, oil mixing with water pond needs regular moisturizing.
Oily water separation needs moisturizing while storing up 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:
Cooling and the oily water separation technique of band retort section list outlet gas producer gas purification, referring to the schema shown in accompanying drawing 2.
In the present embodiment, band retort section list outlet gas producer top arranges quantitative spray and presses dirt device, after entering coal dust that maximum material size that stove coal carries is less than 3mm and being squirted, be attached to coal cinder surface, outside avoiding being come out of the stove by Gas Flow band, thereby effectively avoided stove to go out coal gas and carried the problem compared with fine dust, coal gas has been lowered the temperature for the first time simultaneously; Coal gas cools to 250 ℃～350 ℃ for the first time.
Stove goes out the granule dust that first coal gas be greater than 0.5mm through gravitational precipitator by the maximum material size carrying in coal gas and removes.
Coal gas enters oily water separation evaporator tower, utilizes gas heat by needing the water evaporation in the tar of oily water separation to enter coal gas, makes tar fully separated with water, thereby reaches the object of reduction tar water ratio, coal gas is lowered the temperature for the second time simultaneously; Coal gas cools to 100 ℃～150 ℃ for the second time.
Then coal gas enters gas washing temperature-reducing tower again, utilizes water coolant to lower the temperature to coal gas, make to account in coal gas simultaneously gas quality than more than 65% tar condensing after, together enter oil mixing with water pond with water coolant, coal gas is lowered the temperature for the third time simultaneously; Coal gas cools to 80 ℃～120 ℃ for the third time.
Coal gas obtains deep purifying after entering electrostatic tar remover, further removes tar and dust remaining in coal gas.
The coal gas that removes tar removing and dust through electrostatic tar remover enters indirect cooler, and coal gas is carried out to more the 4th cooling down of the degree of depth; Coal gas cools to 35 ℃～50 ℃ for the 4th time.
Next step, coal gas enters static except light oil device, and the mechanical water droplet in coal gas and light oil droplet are caught and removed;
Finally by coal gas supercharging equipment, be pressed and delivered to coal gas desulfurization station or user;
Through electrostatic tar remover catch the tar that removes and gas washing temperature-reducing tower first lower tar collect and enter oil mixing with water pond and collect, be to guarantee the cooling-down effect of gas washing temperature-reducing tower to coal gas, the regular moisturizing of oil mixing with water pond needs; 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 evaporated and enters coal gas, and tar in coal gas is constantly caught after removing and is sneaked in mixed solution by gas washing temperature-reducing tower and electrostatic tar remover, tar ratio in oil mixing with water pond account for mixed solution mass ratio 50% after, by the first transferpump, mixed solution in oil mixing with water pond is imported to oily water separation storage pond.
Oil-water mixture in oily water separation storage pond is delivered 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%, by the second transferpump, first tar is imported in tar storage tank; After the second transferpump imports tar storage tank by tar, and then the oil-water mixture in oil mixing with water pond is imported to 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 the dust content significantly reducing in by-product tar; And do not utilize outer thermal source, only utilize gas heat to enter coal gas by needing water in the tar of oily water separation to evaporate gradually, make tar fully separated with water, thereby reach the object that reduces tar water ratio; Before simultaneously coal gas enters indirect cooler, first carry out high efficiencyly catching tar removing and dust, thereby effectively avoided the latch up phenomenon of indirect cooler.
Claims (7)
1. the cooling and oily water separation technique of band retort section list outlet gas producer gas purification, carry out as follows:
A, band retort section list outlet gas producer top arrange quantitative spray and press dirt device, after entering coal dust that maximum material size that stove coal carries is less than 3mm and being squirted, be attached to coal cinder surface, effectively avoided stove to go out coal gas and carried the problem compared with fine dust, coal gas is lowered the temperature for the first time simultaneously;
B, stove go out the granule dust that first coal gas be greater than 0.5mm through gravitational precipitator by the maximum material size carrying in coal gas and remove;
C, coal gas enter oily water separation evaporator tower, utilize gas heat by needing the water evaporation in the tar of oily water separation to enter coal gas, make tar fully separated with water, coal gas are lowered the temperature for the second time simultaneously;
D, then coal gas enters gas washing temperature-reducing tower again, utilizes water coolant to lower the temperature to coal gas, make to account in coal gas simultaneously gas quality than more than 65% tar condensing after, together enter oil mixing with water pond with water coolant, coal gas is lowered the temperature for the third time simultaneously;
E, coal gas obtain deep purifying after entering electrostatic tar remover, further remove tar and dust remaining in coal gas;
F, process electrostatic tar remover, except the coal gas of tar removing and dust enters indirect cooler, carry out more the 4th cooling down of the degree of depth to coal gas;
G, coal gas enter static except light oil device, and the water droplet in coal gas and light oil droplet are caught and removed;
H, finally by coal gas supercharging equipment, be pressed and delivered to coal gas desulfurization station or user;
I, catch the first lower tar collection of the tar that removes and gas washing temperature-reducing tower enter oil mixing with water pond and collect through electrostatic tar remover, 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 evaporated and enters coal gas, and tar in coal gas is constantly caught after removing and is sneaked in mixed solution by gas washing temperature-reducing tower and electrostatic tar remover, tar ratio in oil mixing with water pond account for mixed solution mass ratio 50% after, by the first transferpump, mixed solution in oil mixing with water pond is imported to oily water separation storage pond;
Oil-water mixture in j, oily water separation storage pond is delivered 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%, by the second transferpump, first tar is imported in tar storage tank; After the second transferpump imports tar storage tank by tar, 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. the cooling and oily water separation technique of band retort section list outlet gas producer according to claim 1 gas purification, is characterized in that: coal gas cools to 250 ℃～350 ℃ for the first time.
3. the cooling and oily water separation technique of band retort section list outlet gas producer according to claim 1 gas purification, is characterized in that: coal gas cools to 100 ℃～150 ℃ for the second time.
4. the cooling and oily water separation technique of band retort section list outlet gas producer according to claim 1 gas purification, is characterized in that: coal gas cools to 80 ℃～120 ℃ for the third time.
5. the cooling and oily water separation technique of band retort section list outlet gas producer according to claim 1 gas purification, is characterized in that: coal gas cools to 35 ℃～50 ℃ for the 4th time.
6. the cooling and oily water separation technique of band retort section list outlet gas producer according to claim 1 gas purification, is characterized in that: be to guarantee the cooling-down effect of gas washing temperature-reducing tower to coal gas, oil mixing with water pond needs regular moisturizing.
7. the cooling and oily water separation technique of band retort section list outlet gas producer according to claim 1 gas purification, is characterized in that: during the repeated isolation step of oily water separation storage pond, need moisturizing.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109576001A (en) * | 2018-08-13 | 2019-04-05 | 湖南叶林环保科技有限公司 | Organic dangerous waste pyrolysis gas purification system |
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2014
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Patent Citations (7)
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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 |
| JP2011148845A (en) * | 2010-01-19 | 2011-08-04 | Ihi Corp | Tar recovery apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109576001A (en) * | 2018-08-13 | 2019-04-05 | 湖南叶林环保科技有限公司 | Organic dangerous waste pyrolysis gas purification system |
| CN109576001B (en) * | 2018-08-13 | 2023-08-22 | 湖南叶林环保科技有限公司 | Organic hazardous waste pyrolysis gas purifying system |
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