CN104624020B - A kind of de-except the method for hydrogen sulfide in gas and solid dust - Google Patents

A kind of de-except the method for hydrogen sulfide in gas and solid dust Download PDF

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Publication number
CN104624020B
CN104624020B CN201510106540.2A CN201510106540A CN104624020B CN 104624020 B CN104624020 B CN 104624020B CN 201510106540 A CN201510106540 A CN 201510106540A CN 104624020 B CN104624020 B CN 104624020B
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China
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filter core
exhaust
entrance
fly
ash separator
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CN201510106540.2A
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Chinese (zh)
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CN104624020A (en
Inventor
吴浩
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北京化工大学常州先进材料研究院
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Abstract

The present invention relates to a kind of de-except the method for hydrogen sulfide in gas and solid dust, it is an object of the invention to provide a kind of effective technique, remove in exhaust the hydrogen sulfide contained and solid particulate matter etc., it is achieved the cleaning discharge of exhaust. Specifically comprising wet absorption step and dry method dust step, wet absorption step adopts absorption tower to absorb the hydrogen sulfide acidic substance in exhaust, and dry method dust step adopts fly-ash separator to remove solid dust particulate matter.

Description

A kind of de-except the method for hydrogen sulfide in gas and solid dust

Technical field

The present invention relates to a kind of method of gas sweetening, specifically, it relates to a kind of purification is containing the method for hydrogen sulfide and the gas of solid dust particulate matter.

Background technology

Industrial, such as, usually containing H in the conversion gas of conversion section generation or the tail gas of coking industry etc. in the production of chemical fertilizers production or coking2S and solid dust. Not only can in the pilot process produced corrosion pipeline, but also the purity of product can be affected, what have more harm is also pollute the environment after discharging. H2S is a kind of colourless gas, has the stench taste of similar rotten egg, hypertoxic, soluble in water, and the aqueous solution, in acid, can generate salt with alkali, therefore can absorb with alkali lye. H2S has extremely strong toxicity, and in air, concentration reaches 140mg/m3Time can cause conjunctivitis and keratitis, when concentration is approximately 280mg/m3Time, stupor can be caused, breathe paralysis even dead. Lower concentration H2The symptom that S causes has headache, vomiting, insomnia, weak, eyes and mucosa irritation, therefore H2S waste gas is a kind of a kind of gas that the mankind and animals and plants impact are bigger, and country has also formulated strict emission standard. Maximum acceptable concentration in regulation air is 0.06mg/m3. But the alkali liquor absorption of routine, shortcoming absorbs thoroughly, and assimilated efficiency is low, and is also difficult to effectively remove the solid particulate matter in waste gas. Consequently, it is desirable to develop a kind of effective purification process with the hydrogen sulfide of efficiently removing in gas and solid dust particulate matter.

Summary of the invention

It is an object of the invention to provide a kind of effective technique, remove in exhaust the hydrogen sulfide and solid particulate matter that contain, it is achieved the cleaning discharge of exhaust.

The technical solution adopted for the present invention to solve the technical problems is: a kind of containing the purifying method of hydrogen sulfide and the exhaust of solid dust, comprise wet absorption step and dry method dust step, it is characterized in that: first exhaust enters absorption tower 1, gas inlet, absorption tower 2 turns into multiple branches entrance 6 after entering absorption tower 1, branch's entrance 6 from be evenly distributed in absorption tower to lower along oblique line, branch's entrance distance gas inlet 2 of the top is nearest, and branch's entrance distance gas inlet 2 of bottom is the farthest away; The atomizer 5 being equipped with a correspondence on the top of each branch's entrance, each atomizer 5 is 0.5-2m apart from the distance of corresponding branch's entrance; The Absorption Solution of Diethylolamine of atomizer injection falls into bottom absorption tower after fully reacting with the hydrogen sulfide in exhaust, and the absorbing liquid of bottom loops back atomizer under the effect of recycle pump 7 to be continued to participate in reaction;

The exhaust discharged from absorption tower 1 enters in fly-ash separator 10 subsequently, first exhaust enters fly-ash separator from fly-ash separator entrance 11, exhaust frontal impact is on fluid dividing cover 12, fluid dividing cover is conically shaped body, major part exhaust enters fly-ash separator through divergent segment 16 and expands the flow cavity 33 in section 17, exhaust contacts with the filter core 30 in filter core bracing frame 29 after flow cavity 33, and gas enters discharge chamber 32 after filtering through filter core 30 and discharges fly-ash separator;

Flow downward along fluid dividing cover 12 after sub-fraction gasses impinge fluid dividing cover 12, strike 3-10 sheet blade 28 fixing on filter core bracing frame 29 top top board 39, filter core bracing frame 29 inwall is provided with spiral slide 36, spiral slide 36 coordinates with the 2nd spiral slide of annular Internal baffle 15 outer wall, gasses impinge blade 28, blade 28 drives filter core bracing frame 29 to rotate along the 2nd spiral slide while moving downward, base plate 40 bottom bracing frame 29 is connected with buffering parts 27, the other end of buffering parts 27 is fixed on the support block 20 on cinder catcher inwall 19, bracing frame 29 rotates together with filter core 30 and moves downward, filter core 30 times ends enter in cinder catcher 34, in annular cinder catcher outer wall 18, cinder catcher 34 inlet end correspondence is provided with scraper 22, being provided with hairbrush 23 below scraper 22, in the cinder catcher inwall 19 on hairbrush 23 opposite, correspondence position is provided with nozzle 24 in order to purge gas of jetting to filter core 30 back side, removing the particulate matter of filter core 30 adsorption filtration under the acting in conjunction of scraper 22, hairbrush 23 and nozzle 24, filter core 30 is regenerated.

As preferably, the quantity of branch's entrance is 4-8.

As preferably, atomizer is 1-1.5m apart from the distance of branch's entrance.

As preferably, the filter core of fly-ash separator is activated carbon cartridge, polypropylene fibre, steel fiber, glass fibre.

As preferably, the quantity of blade is 7.

As preferably, buffering parts are damper rod, hydraulic stem or spring, its quantity can be 2-8.

As preferably, fluid dividing cover is provided with relief port.

The invention has the beneficial effects as follows:

1, absorption tower cloth gas means are unique, greatly improve gas distribution effect and gas liquid contacting efficiency, significantly improve decontamination effect improving.

2, fly-ash separator at work filter core constantly rotary motion can carry out reprocessing cycle use, and regenerative operation does not need extra operation power, only relies on the kinetic energy of exhaust self just can realize the motion of filter core, low energy.

3, by wet method depickling and dry method dust means being combined, the hydrogen sulfide in exhaust and solid particulate matter, energy-conserving and environment-protective are removed efficiently.

Accompanying drawing explanation

Fig. 1 is the process route chart of the present invention.

Fig. 2 is the schematic diagram of the wet absorption tower of the present invention.

Fig. 3 is the front view of the fly-ash separator of the present invention.

Fig. 4 is the AA sectional view of the fly-ash separator of the present invention.

Fig. 5 is the schematic diagram of the fluid dividing cover of the fly-ash separator of the present invention.

Fig. 6 is the skeleton view of the bracing frame of the fly-ash separator of the present invention.

Reference numeral and the parts corresponding to it are described as follows:

1, absorption tower; 2, gas inlet, absorption tower; 3, absorption tower pneumatic outlet; 4, mist eliminator; 5, atomizer; 6, branch's entrance; 7, recycle pump; 10, fly-ash separator; 11, fly-ash separator entrance; 12, fluid dividing cover; 13, relief port; 14, annular outer baffle; 15, annular Internal baffle; 16, divergent segment; 17, section is expanded; 19, lower baffle plate; 20, block is supported; 21, wear ring; 22, scraper; 23, hairbrush; 24, nozzle; 25, back-flushing valve; 26, unloading valve; 27, parts are cushioned; 28, blade; 29, bracing frame; 30, filter core; 31 filter plates; 32, discharge chamber; 33, flow cavity; 34, cinder catcher; 35, earial drainage chamber; 36, spiral slide; 38, fastening ring; 39, top board; 40, base plate

Embodiment

Following examples are used for the explanation to the present invention, but are not used for limiting the scope of the invention.

The present invention is a kind of exhaust gas-cleaning method, and it comprises wet absorption step and dry method dust step. It is about 3-70mg/m containing dust content in the exhaust of hydrogen sulfide3, hydrogen sulfide content is about 8000mg/Nm3. First exhaust enters in absorption tower, and acid exhaust enters from the gas inlet on absorption tower, with the diethanolamine contact reacts of atomization, and exhaust release of heat cooling, absorbing liquid evaporates rapidly; Sour gas in exhaust and the abundant contact reacts of absorbing liquid, H2S is able to effective removal. The dust contained in the exhaust absorbing liquid adsorbing and removing that also some is atomized.

Exhaust through absorption tower process enters in fly-ash separator subsequently, through the filter core of fly-ash separator, remaining solid particulate matter in effective removal exhaust, owing to the acidic corrosive material in exhaust is removed in absorption tower, therefore, filter core range of choice in fly-ash separator is wider, it is possible to use non-acidproof erosion resistance filter core. Exhaust after purification can in mechanism's discharge air such as induced draft fan.

Embodiment:

As shown in Figure 1 and Figure 2, first the conversion gas of 150-250 DEG C containing hydrogen sulfide and solid dust particulate matter enter absorption tower 1, gas inlet, absorption tower 2 turns into 4 branch's entrances 6 after entering absorption tower 1, branch's entrance 6 from be evenly distributed in absorption tower to lower along oblique line, branch's entrance distance gas inlet 2 of the top is nearest, and branch's entrance distance gas inlet 2 of bottom is the farthest away. 4 branch's entrances can realize being uniformly distributed of gas substantially. The atomizer 5 being equipped with a correspondence on the top of each branch's entrance, atomizer 5 is apart from branch entrance 1m. Owing to gas inlet is divided into some branch's entrances, so namely by arranging corresponding atomizer in each branch ingress to improve reaction efficiency, the distributed degrees of exhaust in absorption tower can be improved again. Except the atomizer 5 that correspondence is arranged, it is provided with conventional atomizer equally at the top on absorption tower, to improve gas liquid contacting efficiency further. Diethanolamine falls into bottom absorption tower after fully reacting with the hydrogen sulfide in exhaust, and the absorbing liquid of bottom loops back atomizer under the effect of recycle pump 7 to be continued to participate in reaction. By this kind of strong mass-and heat-transfer process, the acid contaminant in exhaust carries out sufficient combination reaction with diethanolamine, and the sour gas in exhaust is able to sufficient removal. It is provided with mist eliminator 4 on the top on absorption tower, after mist eliminator 4, discharges absorption tower from absorption tower pneumatic outlet 3 containing wet exhaust. By in the exhaust behind absorption tower, H2The concentration of S can by initial 8000mg/Nm3It is reduced to about 3mg/Nm3��

The exhaust discharged from absorption tower 1 enters in fly-ash separator 10 subsequently, first exhaust enters fly-ash separator from fly-ash separator entrance 11, be vented first frontal impact on fluid dividing cover 12, fluid dividing cover is conically shaped body, under the effect of fluid dividing cover 12, major part exhaust enters fly-ash separator through divergent segment and expands the flow cavity 33 in section, the expansion section wall of fly-ash separator constitutes flow cavity 33 with inner annular outer baffle 14, exhaust contacts with the filter core 30 in filter core bracing frame 29 after flow cavity 33, and filter core 30 is activated carbon cartridge. Annular outer baffle 14 together constitutes the gas flow path on filter core 30 together with annular Internal baffle 15 with cinder catcher outer wall 18 and cinder catcher inwall 19, wear ring 21 it is provided with, with to prevent gas enters cinder catcher 34 without filter core 30 between filter core 30 and cinder catcher outer wall 18. Particulate matter, toxic substance in gas are entered discharge chamber 32 after filter core 30 filters discharge fly-ash separator by filter core 30 adsorption filtration, purified gases. The particulate matter that the filter core 30 of annular can filter at the surface deposition one layer of filter core during filtering, the particulate matter of deposition can reduce the filter effect of filter core, and therefore filter core needs regular regeneration.

The regenerative process of filter core 30: see Fig. 3, Fig. 4, Fig. 6. after exhaust enters fly-ash separator from fly-ash separator entrance 11, as previously mentioned, the exhaust of major part enters in flow cavity 33 under fluid dividing cover 12 guides and enters filtration stage, in addition, flow downward along fluid dividing cover 12 after having sub-fraction gasses impinge fluid dividing cover 12, strike blade 28 fixing on filter core bracing frame 29 top top board 39, filter core bracing frame 29 inwall is provided with spiral slide 36, spiral slide 36 coordinates with the spiral slide (not shown) of annular Internal baffle outer wall, therefore, gasses impinge blade 28, blade 28 drives filter core bracing frame 29 to rotate under the support of spiral slide and guiding while moving downward. bracing frame 29 rotates together with filter core 30 and moves downward, enter in cinder catcher 34, bracing frame 29 and cinder catcher inwall 19 are in close contact, filter core 30 and cinder catcher outer wall 18 leave certain space, in annular cinder catcher outer wall 18 near cinder catcher inlet end first correspondence be provided with two panels scraper 22, filter core 30 pressed close to by scraper 22, hairbrush 23 it is provided with below scraper 22, the bristle contact filter core 30 of hairbrush 23, in the cinder catcher inwall 19 on hairbrush 23 opposite, correspondence position is provided with nozzle 24 in order to purge gas of jetting to filter core 30 back side, and back-flushing valve 25 controls the flow of purge gas. under the effect of scraper 22, the impurity of filter core 30 surface deposition rotated is struck off by scraper, filter core 30 further rotates decline, removes the particulate matter of filter core 30 adsorption filtration subsequently under the acting in conjunction of hairbrush 23 and nozzle 24 further, and filter core 30 is regenerated under multiple regenerative means process. the impurity being removed falls into bottom cinder catcher 34, and accumulation is discharged outside fly-ash separator by unloading valve 26 to a certain extent afterwards. the amount of cinder catcher 34 inner product ash can by detection means detections automatically such as particle sensor detections.

See Fig. 3, the bottom circumference of fluid dividing cover 12 is fixedly connected with annular Internal baffle 15, bracing frame 29 rotates decline around annular Internal baffle 15, base plate 40 bottom bracing frame 29 is connected with buffering parts 27, buffering parts are preferably damper rod, and the other end of buffering parts 27 is fixed on the support block 20 on cinder catcher inwall. The effect of buffering parts 27 is the lowering speed of control bracing frame 29, prevents decline too fast. The buffering position of parts 27 and quantity can be selected as required, certainly not stop that nozzle 24 is advisable, are only the existence in order to show to cushion parts 27 in Fig. 3, and and the relative position of non-limiting buffer part part 27 and nozzle 24. Certainly, it is also possible to adopt the device that other have similar functions, such as hydraulic stem, spring etc. In addition, the lowering speed of bracing frame 29 can also regulate by arranging the blade 28 of different quantities and angle, in the present embodiment, the quantity of blade is preferably 7, flow velocity according to exhaust, 7 blades can realize good speed of rotation, can also by arranging less or more blade to reduce or to increase the lowering speed of bracing frame 29, such as, it can be 3,5,10 etc. In regenerative process, after the major part of filter core 30 has been lowered to cinder catcher 34 and has been reproduced, can control buffering parts or other like oppositely bracing frame 29 is exerted pressure, such as stop air inlet, the buffering parts then compressed can impel bracing frame 29 reverse rotation rising to return to initial working order, and move in circles work according to this.

See Fig. 5, this figure is the stereographic map of fluid dividing cover 12, and fluid dividing cover 12 can arrange relief port 13, and relief port 13 is closed under normal circumstances, and gas can not pass through from fluid dividing cover 12. When the pressure transmitter (not shown) in fly-ash separator measure in fly-ash separator pressure higher than normal value after, relief port 13 is opened, and air-flow can flow through from relief port 13, enters earial drainage chamber 35, discharges fly-ash separator after filter plate 31 filters. The open and close of relief port 13 can by the close switch Long-distance Control at relief port place. When fly-ash separator runs, run into flow sometimes, flow velocity fluctuates bigger input air-flow, run into the accident blocking of strainer sometimes, when run into similar make the situation that pressure in fly-ash separator increases time, for ensureing that production safety can open relief port 13 with the pressure in rapid reduction fly-ash separator, prevent the damage of filter core or fly-ash separator, due to the existence of screen plate 31, it is also possible to ensure the security of earial drainage gas.

See Fig. 6, this figure is the stereographic map of bracing frame 29, the top board 39 of bracing frame 29 upper end is fixed with blade 28, the main body of bracing frame 29 forms roughly netted ventilating structure by vertical grid and the multiple fastening ring 38 that plays reinforcement effect, and the inwall of bracing frame 29 is fixed with spiral slide 36 and rotates decline with guide support frame 29 around annular Internal baffle. The material of bracing frame 29 and spiral slide 36 can be the material arbitrarily with certain rigidity, such as stainless steel, plastics etc.

Exhaust is after absorption tower 1, fly-ash separator 10, and acidic substance and solid particulate matter in gas are substantially all removed, and gas reaches emission standard.

In the purifying method of the present invention, the absorption tower used, by the cloth gas means of uniqueness, greatly improves gas distribution effect and gas liquid contacting efficiency, significantly improves decontamination effect improving. The fly-ash separator used at work filter core can constantly carry out reprocessing cycle use, and do not need extra operation power, only rely on the kinetic energy of exhaust self just can realize the regeneration of filter core. Due to the absorption tower of the present invention and the common coupling of fly-ash separator, effectively eliminate the hydrogen sulfide in exhaust and solid particulate matter, it is achieved that the cleaning discharge of exhaust.

Above-described embodiment is the one preferably scheme of the present invention, not the present invention is done any restriction in form, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.

Claims (7)

1. one kind contains the purifying method of the exhaust of hydrogen sulfide and solid dust, comprise wet absorption step and dry method dust step, it is characterized in that: first exhaust enters absorption tower (1), gas inlet, absorption tower (2) turns into multiple branches entrance (6) after entering absorption tower (1), branch's entrance (6) from be evenly distributed in absorption tower to lower along oblique line, branch's entrance distance gas inlet (2) of the top is nearest, and branch's entrance distance gas inlet (2) of bottom is the farthest away; The atomizer (5) being equipped with a correspondence on the top of each branch's entrance, each atomizer (5) is 0.5-2m apart from the distance of corresponding branch's entrance; The Absorption Solution of Diethylolamine of atomizer injection falls into bottom absorption tower after fully reacting with the hydrogen sulfide in exhaust, and the absorbing liquid of bottom loops back atomizer under the effect of recycle pump (7) to be continued to participate in reaction;
The exhaust discharged from absorption tower (1) enters in fly-ash separator (10) subsequently, first exhaust enters fly-ash separator from fly-ash separator entrance (11), exhaust frontal impact is on fluid dividing cover (12), fluid dividing cover is conically shaped body, major part exhaust enters fly-ash separator through divergent segment (16) and expands the flow cavity (33) in section (17), exhaust contacts with the filter core (30) in filter core bracing frame (29) after flow cavity (33), and gas enters discharge chamber (32) after filtering through filter core (30) and discharges fly-ash separator, flow downward along fluid dividing cover (12) after sub-fraction gasses impinge fluid dividing cover (12), strike upper fixing 3-10 sheet blade (28) in filter core bracing frame (29) top top board (39), filter core bracing frame (29) inwall is provided with spiral slide (36), spiral slide (36) coordinates with the 2nd spiral slide of annular Internal baffle (15) outer wall, gasses impinge blade (28), blade (28) drives filter core bracing frame (29) to rotate along the 2nd spiral slide while moving downward, the base plate (40) of filter core bracing frame (29) bottom is connected with buffering parts (27), the other end of buffering parts (27) is fixed on the support block (20) on cinder catcher inwall (19), filter core bracing frame (29) rotates together with filter core (30) and moves downward, filter core (30) lower end enters in cinder catcher (34), in annular cinder catcher outer wall (18), cinder catcher (34) inlet end correspondence is provided with scraper (22), scraper (22) lower section is provided with hairbrush (23), and cinder catcher inwall (19) the interior correspondence position on hairbrush (23) opposite is provided with nozzle (24) in order to purge gas of jetting to filter core (30) back side, removing the particulate matter of filter core (30) adsorption filtration under the acting in conjunction of scraper (22), hairbrush (23) and nozzle (24), filter core (30) is regenerated.
2. purifying method according to claim 1, it is characterised in that: the quantity of branch's entrance (6) is 4-8.
3. purifying method according to claim 1, it is characterised in that: the distance of atomizer (5) distance branch's entrance (6) is 1-1.5m.
4. purifying method according to claim 1, it is characterised in that: the filter core (30) of fly-ash separator is activated carbon, polypropylene fibre, steel fiber, glass fibre.
5. purifying method according to claim 1, it is characterised in that: the quantity of blade (28) is 7.
6. purifying method according to claim 1, it is characterised in that: buffering parts (27) is damper rod, hydraulic stem or spring, and its quantity is 2-8.
7. purifying method according to claim 1, it is characterised in that: fluid dividing cover (12) is provided with relief port (13).
CN201510106540.2A 2015-03-11 2015-03-11 A kind of de-except the method for hydrogen sulfide in gas and solid dust CN104624020B (en)

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CN104964290B (en) * 2015-06-14 2017-09-29 沈阳白云机械有限公司 A kind of emission-control equipment

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JPS5939328A (en) * 1982-08-27 1984-03-03 Babcock Hitachi Kk Desulfurization of exhaust gas
CN1368399A (en) * 2001-01-31 2002-09-11 陈鸣楼 Bag-type dusting and wet absorption desulfurizing system
CN101293178A (en) * 2008-06-16 2008-10-29 河南海力特机电制造有限公司 Heavy pressure fine spray desulfurising-dusting apparatus and method for desulfurization and dust removal
CN101507895A (en) * 2009-02-26 2009-08-19 安徽省元琛环保科技有限公司 Large flue gas desulfurization dust-removal system
CN101549246B (en) * 2009-04-30 2011-08-17 杭州三和环保技术工程有限公司 Sintering flue gas desulfurization combined coking coal gas deamination cycling system
CN102806005B (en) * 2012-08-25 2014-12-17 河北华强科技开发有限公司 Method for dedusting, desulfuration and denitration of flue gas and integrated absorption tower equipment for dedusting, desulfuration and denitration
CN103949132B (en) * 2014-05-19 2016-11-23 英利能源(中国)有限公司 A kind of cleaner

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