CN103060019A - Self-circulation desulfurization device and desulfurization method - Google Patents
Self-circulation desulfurization device and desulfurization method Download PDFInfo
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- CN103060019A CN103060019A CN 201310039773 CN201310039773A CN103060019A CN 103060019 A CN103060019 A CN 103060019A CN 201310039773 CN201310039773 CN 201310039773 CN 201310039773 A CN201310039773 A CN 201310039773A CN 103060019 A CN103060019 A CN 103060019A
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Abstract
A self-circulation desulfurization device comprises a SO2 (sulfur dioxide) absorbing tower, a H2S (hydrogen sulfide) absorbing tower, a crystallizing device, a sulfur pulp drying device and a sulfur burning furnace, wherein the SO2 absorbing tower and the H2S absorbing tower are connected sequentially; the coke oven gas enters the H2S absorbing tower from the tower bottom, the gas from which the H2S is removed is exhausted from the upper part of the H2S absorbing tower; a part of the sulfur-containing pregnant solution is fed to the top of the H2S absorbing tower for being sprayed again and recycled; the rest of the sulfur-containing pregnant solution is fed to the crystallizing device to carry out sulfur purification; and the sulfur pulp generated in the crystallizing device is fed to the sulfur pulp drying device, wherein a part of sulfur pulp is configured to be dry sulfur and the rest of the sulfur pulp is fed back to the sulfur burning furnace via a pipeline. The invention further discloses a self-circulation desulfurization method. By using the characteristic of sulfide reaction, the alkaline source and the catalyst are not in need during the whole process, the H2S is removed in the self-circulation manner, thus a bran-new desulfurization method is provided.
Description
Technical field
The invention provides a kind of desulfurizer and sulfur removal technology that is widely used in the sulfurous gass such as height temperature dry distillation of coal gas, water-gas, Sweet natural gas, belong to chemical gases Impurity Absorption technical field.
Background technology
At chemical enterprise especially coal chemical industry enterprises, sulfide hydrogen does not wait from 6 ~ 15g/Nm3 in the coke-oven gas, and it is HPF method, AS method, vacuum carbonation and dry desulfurization that the method that removes hydrogen sulfide from coal gas is used more.Traditional technology generally adopts alkaline doctor solution absorbing hydrogen sulphide under the effect of catalyzer, and the method with air regenesis produces side reaction simultaneously, produces a large amount of reluctant waste liquids and byproduct, produces a large amount of waste gas.Environment is caused pollution, needed a large amount of affiliated facilities that it is eliminated.
Summary of the invention
For above-mentioned situation, the present invention aims to provide a kind of low consumption, low cost, pollution-free, gas desulfurizer and technique that added value of product is high, it can not use alkali source, catalyzer in sweetening process, do not produce side reaction, and product quality is high, not only guarantee the Systems balanth operation, and running cost is low, is worth popularizing and promoting.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of self-circulation desulfurizer comprises SO2 absorption tower, H2S absorption tower, crystallization apparatus, sulfur slurry drying installation and sulphur burner, it is characterized in that described SO
2Absorption tower and H
2Connect in turn before and after the S absorption tower, and coke-oven gas is from H
2S absorption tower bottom enters in the tower, spills the SO that comes from that gets off with H2S absorbing tower top spray
2Absorption tower and be dissolved with SO
2The absorption liquid counter current contact, remove coal gas behind the hydrogen sulfide from H
2Discharge on top, S absorption tower;
The sulfur-bearing rich solution of bottom, described H2S absorption tower is delivered to the again spray cycle utilization of top, H2S absorption tower with a rich solution pump part at the bottom of the H2S absorbing tower; Remainder is delivered to the purification that crystallization apparatus carries out sulphur;
The steam that the sulfur-bearing that produces in the described crystallization apparatus is lower is sent top, SO2 absorption tower back to by lean pump and is again sprayed behind condenser, the sulfur slurry that produces in the crystallization apparatus becomes dry sulphur finished product through sulfur slurry drying installation rear portion and packs, another part is sent sulphur burner back to by pipeline, and the gas that sulphur burner produces supplies to bottom, SO2 absorption tower.
Between described condenser and lean pump, also be provided with a lean solution holding tank.
Use thermal conductive oil pipeline to carry out heat exchange at described sulphur burner and crystallization apparatus, so that the heat that sulphur burner produces is crystallization apparatus heat supply (evaporative crystallization institute heat requirement).
Described sulfur slurry drying installation comprises whizzer and the vibratory liquefaction drying bed that serial connection connects, and the filtrate that whizzer removes is returned H2S absorption tower bottom cycle and used, and the sulphur crystal that whizzer is discharged is delivered to the vibratory liquefaction drying bed through chute and formed dry sulphur.
A kind of self-circulation sulfur method may further comprise the steps process,
Step 1, sulphur are burnt in sulphur burner and are produced and to SO2 absorption tower supply sulfur dioxide gas, sulfur dioxide gas is formed sulfurous gas solution by top-down absorption liquid absorption;
Step 2, the sulfurous gas solution of discharging from SO2 absorption tower bottom sprays in the H2S absorption tower from top to bottom, and with the coke-oven gas reaction to be clean of adverse current from bottom to top, the coal gas that removes behind the hydrogen sulfide is discharged stand-by from top, H2S absorption tower;
Step 3 is delivered to H from the sulfur-bearing rich solution part that discharge bottom, H2S absorption tower
2Spray again at top, S absorption tower, further absorbs the hydrogen sulfide in the coke-oven gas to be clean; Another part is delivered to crystallization apparatus and is regenerated;
Step 4, the sulfur-bearing rich solution forms lean solution and is sent to SO through the steam behind the crystallization apparatus after condensation
2The absorption tower recycles; The sulfur-bearing rich solution obtains dry sulphur through the sulphur slurries behind the crystallization apparatus behind separation, drying bed, a dry sulphur part enters stockyard, and another part is delivered to sulphur burner.
Sulphur is the dry sulphur that comes from the step 4 in the step 1.
Absorption liquid comes from the lean solution in the step 4 in the step 1.
The invention has the beneficial effects as follows: the present invention uses the characteristic of sulfide reaction, whole process is without any alkali source, catalyzer of adding, remove hydrogen sulfide in the mode that self circulates, this reaction conditions is simple, no longer add alkali source, catalyzer, avoid expensive, high pollution, started brand-new sulfur method.
And the desulphurization reaction process is single, and provides desulfurization material by sulphur itself, so running cost is low; Can adapt to the high-sulfur gas sweetening, desulfuration efficiency is high, and product purity is high, and environmental protection, economical efficiency get both; As requested production high purity sulphur or supporting acid-making process generate sulfuric acid.So the present invention has opened up new approach to desulphurization technological process, greatly reduced the desulfurization operation cost, increased substantially the quality of desulfurization product.The required condition of this technique is simple, and wide accommodation has preferably environment benefits and economic gains.
Description of drawings
Fig. 1 is self-circulation desulfurizer and process route view;
Among the figure: 1H
2The S absorption tower, 2 rich solution pumps, 3 condensate coolers, 4 crystallization apparatus, 5 whizzers, 6 vibratory liquefaction drying beds, 7 sulphur hoppers, 8 lean solution holding tanks, 9 lean pumps, 10 sulphur burners, 11SO
2The absorption tower, 12 sulfurous gas solution elevating pumps, 13 vacuum pumps, 14 thermal conductive oil pipelines, 15 coke-oven gas.
Embodiment
Such as Fig. 1, concrete steps of the present invention following (to remove hydrogen sulfide in the coke-oven gas as example):
Principle: elemental sulfur burns in oxygen and generates sulfurous gas, sulfurous gas is dissolved in the water, with the hydrogen sulfide in the sulfurous gas spray solution absorption coal gas, the two reaction generates the water-soluble sulfonium ion of energy, forms the sulfur-bearing rich solution, the sulfur-bearing rich solution generates elemental sulfur through evaporative crystallization, lean solution recycle, the reuse of elemental sulfur part again with oxygen reaction, so form self circulation desulfurization, whole reaction conditions is simple, no longer adds alkali source, catalyzer.
Coke-oven gas 15 is from H
21 bottom, S absorption tower enters in the tower, with the cat head SO that sprayed the dissolving of getting off
2Sulfurous gas solution counter current contact, the coke-oven gas that removes behind the hydrogen sulfide is delivered to subsequent processing behind the drop that gas-liquid separator separates goes out to carry secretly, become the commodity finished product.
The sulfur-bearing rich solution that has absorbed hydrogen sulfide is divided into two portions, and a part is delivered to H with rich solution pump 2 at the bottom of thionizer
2Spray again at top, S absorption tower, further absorbs the hydrogen sulfide in the coke-oven gas; Another part extension sulfur-bearing rich solution at the bottom of the thionizer is delivered to crystallization apparatus 4 and is regenerated.The sulfur-bearing rich solution is heated by thermal conductive oil pipeline 14 in crystallization apparatus, after leaving crystallization apparatus, the steam that produces under the effect of vacuum pump 13, enters condensate cooler 3, through in after the warm water cooling, steam condensate (lean solution) flows into lean solution holding tank 8 certainly, the desulfurization lean solution after the regeneration is delivered to SO with lean pump 9
2Recycle behind the absorption tower.
The sulphur slurries that flowed out by crystallization apparatus bottom are through whizzer 5(or plate-and-frame filter press) separate after, filtrate is returned the thionizer bottom cycle and is used, without effluxing, the sulphur crystal of discharging is delivered to vibratory liquefaction drying bed 6 through chute, with warm air it is carried out drying, enter sulphur hopper 7 again after the cold blast engine cooling, a sulphur part that obtains enters stockyard after weighing, packing, another part is delivered to sulphur burner 10, uses as raw material.
In sulphur burner, violent oxidizing reaction occurs in sulphur simple substance and oxygen 16, and burning generates SO
2The time, discharging a large amount of heats, these heats are used for heating thermal conductive oil pipeline 14 the other ends, for crystallization apparatus provides thermal source, enable to be fully utilized.
The SO that generates in the sulphur burner
2Enter SO from the bottom
2Absorption tower 11, the regenerative sulfur binding lean solution counter current contact of in tower, spraying with cat head from bottom to top, SO
2Be dissolved in the desulfurization lean solution and form SO
2Then solution deliver to H with sulfurous gas solution elevating pump 12
2The hydrogen sulfide that absorbs in the coal gas is sprayed at top, S absorption tower.
Embodiment recited above is described preferred implementation of the present invention; be not that scope of the present invention is limited; design under the prerequisite of spirit not breaking away from the present invention; the relevant technical staff in the field all should expand as in the determined protection domain of claims of the present invention various distortion of the present invention and improvement.
Claims (7)
1. a self-circulation desulfurizer comprises SO
2Absorption tower, H
2S absorption tower, crystallization apparatus, sulfur slurry drying installation and sulphur burner is characterized in that, described SO
2Absorption tower and H
2Connect in turn before and after the S absorption tower, and coke-oven gas is from H
2Bottom, S absorption tower enters in the tower, with H
2S absorbing tower top spray is spilt the SO that comes from that gets off
2Absorption tower and be dissolved with SO
2The absorption liquid counter current contact, remove coal gas behind the hydrogen sulfide from H
2Discharge on top, S absorption tower;
Described H
2The sulfur-bearing rich solution of bottom, S absorption tower is from H
2Deliver to H with a rich solution pump part at the bottom of the S absorbing tower
2The again spray cycle utilization of top, S absorption tower; Remainder is delivered to the purification that crystallization apparatus carries out sulphur;
The steam that the sulfur-bearing that produces in the described crystallization apparatus is lower is sent SO back to by lean pump behind condenser
2Spray again at the top, absorption tower, and the sulfur slurry that produces in the crystallization apparatus becomes dry sulphur finished product through sulfur slurry drying installation rear portion to be packed, and another part is sent sulphur burner back to by pipeline, and the gas that sulphur burner produces supplies to SO
2The bottom, absorption tower.
2. a kind of self-circulation desulfurizer according to claim 1 is characterized in that, also is provided with a lean solution holding tank between described condenser and lean pump.
3. a kind of self-circulation desulfurizer according to claim 1 is characterized in that, uses thermal conductive oil pipeline to carry out heat exchange at described sulphur burner and crystallization apparatus.
4. a kind of self-circulation desulfurizer according to claim 1 is characterized in that, described sulfur slurry drying installation comprises whizzer and the vibratory liquefaction drying bed that serial connection connects, and the filtrate that whizzer removes is returned H
2S absorption tower bottom cycle is used, and the sulphur crystal that whizzer is discharged is delivered to the vibratory liquefaction drying bed through chute and formed dry sulphur.
5. a self-circulation sulfur method may further comprise the steps process,
Step 1, sulphur are burnt in sulphur burner and are produced and to SO
2Absorption tower supply sulfur dioxide gas, sulfur dioxide gas is formed sulfurous gas solution by top-down absorption liquid absorption;
Step 2 is from SO
2The sulfurous gas solution that discharge the bottom, absorption tower is at H
2Spray from top to bottom in the S absorption tower, with the coke-oven gas reaction to be clean of adverse current from bottom to top, remove coal gas behind the hydrogen sulfide from H
2Top, S absorption tower is discharged stand-by;
Step 3 is from H
2The sulfur-bearing rich solution part that discharge bottom, S absorption tower is delivered to H
2Spray again at top, S absorption tower, further absorbs the hydrogen sulfide in the coke-oven gas to be clean; Another part is delivered to crystallization apparatus and is regenerated;
Step 4, the sulfur-bearing rich solution forms lean solution and is sent to SO through the steam behind the crystallization apparatus after condensation
2The absorption tower recycles; The sulfur-bearing rich solution obtains dry sulphur through the sulphur slurries behind the crystallization apparatus behind separation, drying bed, a dry sulphur part enters stockyard, and another part is delivered to sulphur burner.
6. a kind of self-circulation sulfur method according to claim 1 is characterized in that, sulphur is the dry sulphur that comes from the step 4 in the step 1.
7. a kind of self-circulation sulfur method according to claim 1 is characterized in that absorption liquid comes from the lean solution in the step 4 in the step 1.
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| CN 201310039773 CN103060019A (en) | 2013-02-01 | 2013-02-01 | Self-circulation desulfurization device and desulfurization method |
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| CN 201310039773 CN103060019A (en) | 2013-02-01 | 2013-02-01 | Self-circulation desulfurization device and desulfurization method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104326486A (en) * | 2014-10-30 | 2015-02-04 | 济南冶金化工设备有限公司 | Device for producing ammonium sulfate by using waste sulphur generated during gas desulfuration |
| CN107899390A (en) * | 2017-09-25 | 2018-04-13 | 江苏河海新能源股份有限公司 | A kind of de- hydrogen sulphide removing device |
| CN112697523A (en) * | 2021-01-08 | 2021-04-23 | 杨松 | Application method of high-branch self-circulation type sampling pipe for nitrogen oxides in ambient air |
| CN112794290A (en) * | 2021-02-26 | 2021-05-14 | 中冶焦耐(大连)工程技术有限公司 | Process and system for treating low-quality sulfur and secondary salt waste liquid produced by coke oven gas desulfurization |
-
2013
- 2013-02-01 CN CN 201310039773 patent/CN103060019A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104326486A (en) * | 2014-10-30 | 2015-02-04 | 济南冶金化工设备有限公司 | Device for producing ammonium sulfate by using waste sulphur generated during gas desulfuration |
| CN107899390A (en) * | 2017-09-25 | 2018-04-13 | 江苏河海新能源股份有限公司 | A kind of de- hydrogen sulphide removing device |
| CN112697523A (en) * | 2021-01-08 | 2021-04-23 | 杨松 | Application method of high-branch self-circulation type sampling pipe for nitrogen oxides in ambient air |
| CN112794290A (en) * | 2021-02-26 | 2021-05-14 | 中冶焦耐(大连)工程技术有限公司 | Process and system for treating low-quality sulfur and secondary salt waste liquid produced by coke oven gas desulfurization |
| CN112794290B (en) * | 2021-02-26 | 2023-09-19 | 中冶焦耐(大连)工程技术有限公司 | Process and system for treating low-quality sulfur and side salt waste liquid of coke oven gas desulfurization product |
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Application publication date: 20130424 |