CN105524669A - Separating and recycling method for fine slag of coal gasification - Google Patents
Separating and recycling method for fine slag of coal gasification Download PDFInfo
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- CN105524669A CN105524669A CN201410512874.5A CN201410512874A CN105524669A CN 105524669 A CN105524669 A CN 105524669A CN 201410512874 A CN201410512874 A CN 201410512874A CN 105524669 A CN105524669 A CN 105524669A
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Abstract
The invention provides a separating and recycling method for fine slag of coal gasification. The method comprises the steps: carrying out settling concentration on black water in a black water settling tank, and then, feeding the concentrated black water to a flotation separation device by a first conveying pump; enabling a carbon-rich component separated out from the upper part of the flotation separation device to enter a pulping coal mill; and enabling a bottom material of the flotation separation device to enter filtrating equipment through a second valve, carrying out filtrating so as to obtain a filtrated-cake-shaped low-carbon component and a filtrate, and pumping the filtrate into a filtrate collecting tank by a second conveying pump. According to the method provided by the invention, the efficient separation and high-added-value graded utilization of the carbon-rich component and the low-carbon component in the fine slag can be achieved.
Description
Technical field
The invention belongs to Coal Chemical Industry waste residue to reclaim and application technology as the second resource field, be specifically related to sorting and the classified utilization method of the thin slag of a kind of gasification.
Background technology
China's coal chemical industry consumption of coal is huge and in quick increasing trend.Coal Gasification Technology is guide and the core technology of coal chemical technology, and the application of Coal Gasification Technology produces a large amount of thin slag.At present, the thin slag of gasification is mixed to burn to wait to be utilized by low side or directly discharge as building materials auxiliary material or power mainly through low price export trade becomes Industrial Solid Waste.Therefore, the efficient reuse of thin slag of gasifying becomes one of difficult point that numerous Coal Gasification Technology faces.
The thin slag of gasification is present in gasification Heisui River, and ash content is high, calorific value is low, but carbon containing about 15 ~ 40 % by weight (butt), and hole is more flourishing, possesses considerable utility value, but be not subject to abundant study and utilization in scientific research and production field at present.
Patent CN101456689A adopts gravity separation method to be separated the thin slag of gasification.Patent CN101638591A adopts method for sieving to be separated the thin slag of gasification.Because the thin slag that gasifies is the fine particle that a kind of component bonding force is strong, the separation efficiency of the gravity separation method that above-mentioned patent adopts or method for sieving is low, and need increase the operations such as the suction filtration in gasification Heisui River and thin slag filtration cakes torrefaction.
Patent CN103695066A and patent CN203602571U discloses reuse method and the structure thereof that hard coal coal slurry gasifier discharges thin slag, method for floating sorting is adopted to gasify thin slag, but the product after sorting is only for mixing burning or building materials, can not be digested by plant area's internal independence, be limited by exterior market demand and transportation radius, technological synthesis cost is high, utilizes added value low.
Summary of the invention
A difficult problem for the thin slag efficient separation of gasification and classified utilization can not be realized in order to overcome existing method, there is provided a kind of gasification thin slag reuse method, the method not only can realize the efficient separation of rich carbon component and low-carbon components in thin slag, and can realize the high added value classified utilization of above-mentioned each component.
The present invention solves above-mentioned technical problem by the following technical programs.
The invention provides the method for the thin slag sorting of a kind of gasification and reuse, the method comprises:
By the Heisui River sedimentation concentration in the subsider of Heisui River, then send into flotation unit by the first transferpump;
The rich carbon component that flotation unit top is selected enters slurrying coal pulverizer;
Make flotation unit bottoms material enter filter plant by the second valve, filter and obtain filter cake shape low-carbon components and filtrate, described filtrate squeezes into filtrate collecting tank by the second transferpump.
According to method provided by the invention, wherein, described rich carbon component is used as coal water slurry particle size modifier and gasifies mixing burning raw material.Preferably, described rich carbon component can carbon containing 35 ~ 80% butt weight.The adding proportion that described rich carbon component is used as coal water slurry particle size modifier can be 0.1 ~ 25 % by weight of butt coal, is preferably 5 ~ 20 % by weight.
According to method provided by the invention, wherein, described low-carbon components is used as the ash fusion point conditioning agent of low ash smelting point type gasification of coal.Preferably, described low-carbon components can carbon containing 5 ~ 20% butt weight.The adding proportion that described low-carbon components is used as ash fusion point conditioning agent can be 0.1 ~ 20 % by weight of butt coal, is preferably 3 ~ 10 % by weight.
According to method provided by the invention, wherein, described first transferpump and the second transferpump can be impeller pump, surge pump, ram pump or spiral pump independently of one another, are preferably impeller pump.
According to method provided by the invention, wherein, described flotation unit can be subaeration flotation machine, pneumatic flotation machine, air agitation type floatation device or gas evolution formula flotation machine, is preferably air agitation type floatation device.
According to method provided by the invention, wherein, described filter plant can be belt vacuum filter, drum filter, disc vacuum filter, turnover panel vacuum filter or plate-and-frame filter press, is preferably belt vacuum filter.
According to method provided by the invention, wherein, in described Heisui River subsider and the first transferpump connecting pipeline, the first valve is provided with; The second valve is provided with in flotation unit and filter plant connecting pipeline; The 3rd valve is provided with in filter plant and filtrate collecting tank connecting pipeline.Wherein, described second valve preferably can automatic open close to set up flotation unit liquid level.
The invention has the beneficial effects as follows, the efficient separation of rich carbon component and low-carbon components in thin slag can be realized.Rich carbon component is used for coal water slurry particle size modifier and burning raw material is mixed in gasification, can improve slurry concentration and the transformation efficiency of feed coal; Low-carbon components is used for the ash fusion point conditioning agent of low melt form gasification of coal, can improve the dross situation of water cooled membrane wall-shaped vapourizing furnace wall, realizes " with slag anti-slag ", and protection gasification furnace wall, relaxes gasification condition.Meanwhile, rich carbon component and low-carbon components are by plant area's internal independence digestion, and eliminate exterior market factor, added value of product is high.
Accompanying drawing explanation
Below, describe embodiment of the present invention in detail by reference to the accompanying drawings, wherein:
Fig. 1 is the process flow sheet of the thin slag reuse method of gasification;
Fig. 2 is that traditional coal gasifies the process flow sheet of thin slag Application way;
Wherein, being described as follows of Reference numeral: 1. Heisui River subsider, 2. the first transferpump, 3. flotation unit, 4. filter plant, 5. the second transferpump, 6. rich carbon component, 7. low-carbon components, 8. filtrate collecting tank, 9. the first valve, 10. the second valve, 11. the 3rd valves, 12. thin slag filter cakes.
Embodiment
Below in conjunction with embodiment, the present invention is further described in detail, the embodiment provided only in order to illustrate the present invention, instead of in order to limit the scope of the invention.
embodiment 1
The present embodiment is for illustration of the thin slag reuse method of gasification provided by the invention.
As shown in Figure 1, by the Heisui River in Heisui River subsider (1) after sedimentation concentration, open the first valve (9), the first transferpump (2) is utilized material to be sent into flotation unit (3), after second valve (10) automatic open close sets up flotation unit (3) liquid level, flotation unit (3) is started working, the rich carbon component (6) selected of top is as coal water slurry particle size modifier and the blended feedstock that gasifies is sent to slurrying coal pulverizer, flotation unit (3) bottoms material enters filter plant (4) by the second valve (10), filter the ash fusion point conditioning agent of filter cake shape low-carbon components (7) as low melt form gasification of coal of formation, filtrate squeezes into filtrate collecting tank (8) through the 3rd valve (11) by the second transferpump (5).
In the present embodiment, rich carbon component carbon containing 37.96 % by weight (butt), ash content 57.34 % by weight (butt), gross calorific value 13.65MJ/Kg (butt), specific surface area 148.6m
2/ g, ash fluid point 1250 DEG C; Low-carbon components carbon containing 16.41 % by weight (butt), ash content 80.81 % by weight (butt), gross calorific value 5.80MJ/Kg (butt), specific surface area 124.4m
2/ g, ash fluid point 1280 DEG C.
comparative example 1
This comparative example to gasify thin slag Application way for illustration of traditional coal.
As shown in Figure 2, Heisui River in Heisui River subsider (1) is after sedimentation concentration, open the first valve (9), the first transferpump (2) is utilized material to be sent into filter plant (4), generate thin slag filter cake (12), filtrate squeezes into filtrate collecting tank (8) through the 3rd valve (11) by the second transferpump (5).
In comparative example 1, thin slag filter cake total water 52.6 % by weight, carbon containing 18.55 % by weight (butt), ash content 78.19 % by weight (butt), gross calorific value 6.35MJ/Kg (butt), specific surface area 136.3m
2/ g, ash fluid point 1260 DEG C.
embodiment 2
The present embodiment uses the obtained rich carbon component of embodiment 1 to be used as coal water slurry particle size modifier and burning raw material is mixed in gasification.
Utilize dry method slurrying, the modified naphthalene sulfonate formaldehyde system slurries additive of the rich carbon component and 0.6 % by weight (butt coal) that the embodiment 1 adding 20 % by weight (butt coals) in the brown coal of Dongming obtains, the water coal slurry concentration prepared is 53.2 % by weight, and apparent viscosity is 1065.0mPaS.
comparative example 2
This comparative example does not add coal water slurry particle size modifier, for contrasting with embodiment 2.
Preparation method is with embodiment 2, and difference is, does not add coal water slurry particle size modifier in this comparative example, and the water coal slurry concentration prepared is 52.1 % by weight, and apparent viscosity is 1174.2mPaS.
Water coal slurry concentration in embodiment 2 is than the raising in comparative example 2 1.1 percentage points, and apparent viscosity reduces 109.2mPaS on the contrary.This is because after adding coal water slurry particle size modifier, slurry granularity is distributed more reasonable, the mutual filling of large or fine granule improves particle packing efficiency, and then improves concentration, reduces apparent viscosity.Industrial practice proves, water coal slurry concentration often improves 1 percentage point, will significantly improve gasification technology economy.
embodiment 3
The present embodiment uses the obtained low-carbon components of embodiment 1 to be used as ash fusion point conditioning agent.
Be mixed into the low-carbon components that the embodiment 1 of 8 % by weight (butt coals) is obtained eastwards in Shengli Brown, the coal ash yield temperature recorded is 1220 DEG C, can meet the > 1200 DEG C that " with slag anti-slag " vapourizing furnace requires.
comparative example 3
This comparative example is used for contrasting with embodiment 3.
The coal ash yield temperature recording eastern Shengli Brown is 1130 DEG C, can not meet the > 1200 DEG C that " with slag anti-slag " vapourizing furnace requires.
Claims (10)
1. a method for the thin slag sorting of gasification and reuse, the method comprises:
By the Heisui River sedimentation concentration in the subsider of Heisui River, then send into flotation unit by the first transferpump;
The rich carbon component that flotation unit top is selected enters slurrying coal pulverizer;
Make flotation unit bottoms material enter filter plant by the second valve, filter and obtain filter cake shape low-carbon components and filtrate, described filtrate squeezes into filtrate collecting tank by the second transferpump.
2. method according to claim 1, wherein, described rich carbon component is used as coal water slurry particle size modifier and burning raw material is mixed in gasification, preferably, described rich carbon component carbon containing 35 ~ 80% butt weight.
3. method according to claim 2, wherein, the adding proportion that described rich carbon component is used as coal water slurry particle size modifier is 0.1 ~ 25 % by weight of butt coal, is preferably 5 ~ 20 % by weight.
4. according to the method in any one of claims 1 to 3, wherein, described low-carbon components is used as the ash fusion point conditioning agent of low ash smelting point type gasification of coal, preferably, and described low-carbon components carbon containing 5 ~ 20% butt weight.
5. method according to claim 4, wherein, the adding proportion that described low-carbon components is used as ash fusion point conditioning agent is 0.1 ~ 20 % by weight of butt coal, is preferably 3 ~ 10 % by weight.
6. method according to any one of claim 1 to 5, wherein, described first transferpump and the second transferpump are impeller pump, surge pump, ram pump or spiral pump, are preferably impeller pump.
7. method according to claim 1, wherein, described flotation unit is subaeration flotation machine, pneumatic flotation machine, air agitation type floatation device or gas evolution formula flotation machine, is preferably air agitation type floatation device.
8. method according to claim 1, wherein, described filter plant is belt vacuum filter, drum filter, disc vacuum filter, turnover panel vacuum filter or plate-and-frame filter press, is preferably belt vacuum filter.
9. method according to any one of claim 1 to 8, wherein, is provided with the first valve in described Heisui River subsider and the first transferpump connecting pipeline; The second valve is provided with in flotation unit and filter plant connecting pipeline; The 3rd valve is provided with in filter plant and filtrate collecting tank connecting pipeline.
10. according to the method described in claim 9, wherein, described second valve energy automatic open close is to set up flotation unit liquid level.
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| CN105964409A (en) * | 2016-05-19 | 2016-09-28 | 康洪强 | Method for treating fine slag of coal gasification device |
| CN107855103A (en) * | 2017-03-15 | 2018-03-30 | 吉林大学 | The method of sorbing material and obtained sorbing material are prepared using coal gasification fine slag |
| CN107857274A (en) * | 2017-03-15 | 2018-03-30 | 吉林大学 | The synthetic method and tobermorite fibrous material of tobermorite fibrous material |
| CN107855105A (en) * | 2017-03-16 | 2018-03-30 | 吉林大学 | The method of porous beads and obtained porous beads are prepared using coal gasification fine slag |
| CN107857275A (en) * | 2017-03-15 | 2018-03-30 | 吉林大学 | The preparation method of xonotlite fiber material and obtained xonotlite fiber material |
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| CN110052334A (en) * | 2019-05-21 | 2019-07-26 | 中国矿业大学 | A kind of coal gasification fine slag FLOTATION SEPARATION dewatering system and method |
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| CN111659707A (en) * | 2020-06-16 | 2020-09-15 | 太原理工大学 | Gasification fine slag carbon-ash separation and high-carbon product dehydration integrated device and method |
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| CN103695041A (en) * | 2013-12-11 | 2014-04-02 | 华东理工大学 | Method for treating black water of coal gasification system |
| CN103695066A (en) * | 2013-12-18 | 2014-04-02 | 贵州赤天化集团有限责任公司 | Recycling method of fine slag discharged by anthracite coal water slurry gasifier and structure thereof |
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| CN114702218A (en) * | 2022-03-25 | 2022-07-05 | 徐州沃力能源科技有限公司 | Municipal sludge and gasified slag co-processing method |
| CN116146987A (en) * | 2023-04-20 | 2023-05-23 | 浙江百能科技有限公司 | Device and method for incinerating and disposing gasification filter cake |
| CN116146988A (en) * | 2023-04-20 | 2023-05-23 | 浙江百能科技有限公司 | System and method for disposing and separating metal oxide from oil residue gasification filter cake |
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