CN104707468A - Flue gas purifier - Google Patents

Flue gas purifier Download PDF

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Publication number
CN104707468A
CN104707468A CN201510106178.9A CN201510106178A CN104707468A CN 104707468 A CN104707468 A CN 104707468A CN 201510106178 A CN201510106178 A CN 201510106178A CN 104707468 A CN104707468 A CN 104707468A
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CN
China
Prior art keywords
flue gas
filter core
deduster
absorption tower
gas
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Granted
Application number
CN201510106178.9A
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Chinese (zh)
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CN104707468B (en
Inventor
吴浩
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Changzhou Institute for Advanced Materials Beijing University of Chemical Technology
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Changzhou Institute for Advanced Materials Beijing University of Chemical Technology
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Priority to CN201510106178.9A priority Critical patent/CN104707468B/en
Publication of CN104707468A publication Critical patent/CN104707468A/en
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Publication of CN104707468B publication Critical patent/CN104707468B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention relates to a flue gas purifier and aims at providing an effective purifier so as to remove flue gas, particularly toxic and harmful substances in medical garbage incineration flue gas, such as acid substances, solid particles and heavy metal and realize the clean emission of the flue gas. The flue gas purifier specifically comprises an absorption tower and a dust collector, wherein the absorption tower is utilized to absorb the acid substances in the flue gas, and the dust collector is utilized to remove the solid particles and the heavy metal. An energy-saving and environment-friendly purifying effect is realized.

Description

A kind of smoke eliminator
Technical field
The present invention relates to a kind of smoke eliminator, particularly relate to a kind of purifier of medical refuse burning flue gas.
Background technology
What medical waste referred to that medical and health organization produces in medical treatment, disease-prevention or healthcare and other correlated activations has directly or the refuse of indirect infection, toxicity and other harmfulness.In order to prevent clinical waste from causing social danger, transmission, and protection of the environment and guarantee health, medical waste needs to obtain appropriate process, and in the middle of existing process means, burning disposal belongs to widely used means.Such as rotary kiln incineration device, rotary kiln is a columniform cylindrical shell, inner lining refractory, slightly tilt to install, feed end is higher than discharging section, and motor drives cylindrical shell around axle center unitary rotation by transmission mechanism, makes medical waste mixing, pyrolytic gasification, burning, rubbish, in slow rotation process, decomposes, is gasificated into fuel gas.Because a large amount of organic chloride of the existence in medical waste is as waste plastics, rubber, leather etc., heavy metal, dust, a large amount of sour gas can be produced after burning, as hydrogen chloride etc.Therefore, how effective process these pollutants just becomes the problem that is needed badly solution.Dry process, semidry process, wet processing and Circulating Fluidized Bed Process are mainly contained to the treatment technology of sour gas; The removal of heavy metal and dust mainly adopts the means such as charcoal absorption, sack cleaner, electrostatic precipitator, but the dust removal effect of above-mentioned means to trickle particle diameter is poor, and there is the problems such as filter bag obstruction, fragmentation in sack cleaner, above-mentioned means are to the comprehensive pollutant Shortcomings removed in waste gas, in order to meet the flue gas of refuse burning discharge standard improved constantly, particularly the problem of sour gas and the disposal of a large amount of flying dust, must adopt and can meet more advanced, more scientific efficient flue gas processing device.
Summary of the invention
The object of the present invention is to provide a kind of effective device, remove the acidic materials and solid particulate matter, heavy metal etc. that contain in medical refuse burning flue gas, realize the clean discharge of flue gas.
The technical solution adopted for the present invention to solve the technical problems is: a kind of smoke eliminator, comprise absorption tower (1) and deduster (10), it is characterized in that: absorption tower (1) has gas access (2), gas access (2) becomes multiple branch inlet (6) after entering absorption tower (1), branch inlet (6) is evenly distributed in absorption tower along oblique line from top to bottom, branch inlet distance gas access (2) of the top is nearest, and branch inlet distance gas access (2) of bottom farthest; Be equipped with the sprayer (5) of a correspondence on the top of each branch inlet, each sprayer (5) is 0.5-2m apart from the distance of corresponding branch inlet; The absorbing liquid that sprayer sprays is with falling into bottom absorption tower after smoke contacts, and absorbing liquid recycling spraying day with fog under the effect of circulating pump (7) of bottom continues to participate in absorbing;
Absorption tower (1) connects deduster 10 afterwards, comprise deduster entrance 11, fluid dividing cover 12, flue gas frontal impact is on the fluid dividing cover 12 of conically shaped body, most of flue gas enters the flow cavity 33 in deduster expansion section 17 through divergent segment 16 subsequently, flue gas contacts with the filter core 30 in cartridge support frame 29 after flow cavity 33, and gas enters discharge chamber 32 after filtering through filter core 30 and discharges deduster;
Sub-fraction flue gas flows downward along fluid dividing cover (12) after clashing into fluid dividing cover (12), strike the upper fixing 3-10 sheet blade (28) in cartridge support frame (29) top top board (39), cartridge support frame (29) inwall is provided with spiral slide (36), spiral slide (36) coordinates with the second spiral slide of annular Internal baffle (15) outer wall, flue gas impact blades (28), blade (28) drives cartridge support frame (29) to rotate along the second spiral slide while move downward, the base plate (40) of bracing frame (29) bottom is connected with buffer unit (27), the other end of buffer unit (27) is fixed on the back-up block (20) on cinder catcher inwall (19), 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) arrival end correspondence is provided with scraper (22), scraper (22) below 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, under the acting in conjunction of scraper (22), hairbrush (23) and nozzle (24), remove the particle of filter core (30) adsorption filtration, filter core (30) is regenerated.
As preferably, the quantity of branch inlet is 4-8.
As preferably, the distance of sprayer distance branch inlet is 1-1.5m.
As preferably, the filter core of deduster is activated carbon cartridge, polypropylene fibre, metallic fiber, glass fibre.
As preferably, the quantity of blade is 7.
As preferably, buffer unit is damper rod, hydraulic stem or spring, and 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, gas distribution means in absorption tower are unique, greatly improve distribution of gas effect and gas liquid contacting efficiency, significantly improve clean-up effect.
2, deduster at work filter core constantly rotary motion can carry out regeneration cycle use, and regenerative operation does not need extra operation power, only relies on the kinetic energy of flue gas self just can realize the motion of filter core, low energy.
3, by wet method and dry method dust means being combined, the poisonous and harmful substance in flue gas is removed efficiently, energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is process route chart of the present invention.
Fig. 2 is the schematic diagram of wet absorption tower of the present invention.
Fig. 3 is the front view of deduster of the present invention.
Fig. 4 is the AA sectional view of deduster of the present invention.
Fig. 5 is the schematic diagram of the fluid dividing cover of deduster of the present invention.
Fig. 6 is the perspective view of the bracing frame of deduster of the present invention.
Reference numeral and the part description corresponding to it as follows:
1, absorption tower; 2, gas access, absorption tower; 3, absorption tower gas vent; 4, demister; 5, sprayer; 6, branch inlet; 7, circulating pump; 10, deduster; 11, deduster 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, back-up block; 21, sealing ring; 22, scraper; 23, hairbrush; 24, nozzle; 25, back-flushing valve; 26, unloading valve; 27, buffer unit; 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, dead ring; 39, top board; 40, base plate
Detailed description of the invention
Following examples are used for explanation of the present invention, but are not used for limiting the scope of the invention.
The present invention is a kind of smoke eliminator, and it comprises absorption tower and deduster.Flue gas is especially from the flue-gas temperature about 400 DEG C-600 DEG C that incinerator for medical garbage comes, first flue gas enters in absorption tower, and acidic flue gas enters from the gas access on absorption tower, with the lime slurry haptoreaction of atomization, flue gas release heat is lowered the temperature, and lime white droplet moisture evaporates rapidly; Sour gas in flue gas and the abundant haptoreaction of lime white droplet, the removal efficiency of HCl and SOx all can reach more than 95%.The solid granulates that course of reaction generates and a small amount of unreacted lime together fall into bottom absorption tower with absorbing liquid, also some lime slurry adsorbing and removing be atomized such as original flue dust, heavy metal in flue gas.
The main chemical reactions process of absorption tower deacidification:
2HCl+Ca(OH) 2→CaCl 2+H 2O
SO 2+Ca(OH) 2→CaSO 3+H 2O
2CaSO 3+O 2→2CaSO 4
SO 3+Ca(OH) 2→CaSO 4+H 2O
Flue gas through absorption tower process enters in deduster subsequently, through the filter core of deduster, remaining solid particulate matter and heavy metal substance in effective removal flue gas, because the acidic corrosive material in flue gas is removed in absorption tower, therefore, filter core range of choice in deduster is comparatively wide, can use non-acidproof corrosion resistance filter core.Flue gas after purification can in the device drains air such as air-introduced machine.
Embodiment:
As shown in Figure 1 and Figure 2, the temperature of medical refuse burning flue gas about 400 DEG C-600 DEG C, containing HCl, SOx, solid particulate matter, heavy metal etc. in flue gas.First flue gas enters absorption tower 1, gas access, absorption tower 2 becomes 4 branch inlet 6 after entering absorption tower 1, branch inlet 6 is evenly distributed in absorption tower along oblique line from top to bottom, and the branch inlet distance gas access 2 of the top is nearest, and the branch inlet distance gas access 2 of bottom farthest.4 branch inlet can realize being uniformly distributed of gas substantially.Be equipped with the sprayer 5 of a correspondence on the top of each branch inlet, sprayer 5 is apart from branch inlet 1m.Because gas access is divided into several branch inlet, so namely by arranging corresponding sprayer at each component inlet to improve reaction efficiency, the distributed degrees of flue gas in absorption tower can be improved again.Except the sprayer 5 that correspondence is arranged, be provided with conventional sprayer equally at the top on absorption tower, to improve gas liquid contacting efficiency further.Lime slurry falls into bottom absorption tower after fully reacting with the acidic materials in flue gas, and absorbing liquid recycling spraying day with fog under the effect of circulating pump 7 of bottom continues to participate in reaction.By this strong mass-and heat-transfer process, the acid contaminant in flue gas carries out sufficient combination reaction with lime slurry, and the sour gas in flue gas is able to sufficient removal.Be provided with demister 4 on the top on absorption tower, after demister 4, discharge absorption tower from absorption tower gas vent 3 containing wet flue gas.By in the flue gas behind absorption tower, the concentration of HCl can lower than 6mg/Nm 3; The concentration of SOx is lower than 10mg/Nm 3, HCl clearance can reach more than 98%, SOx clearance can reach about 90%, and the temperature of flue gas is down to less than 80 DEG C.
The flue gas of discharging from absorption tower 1 enters in deduster 10 subsequently, first flue gas enters deduster from deduster entrance 11, flue gas 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 flue gas enters the flow cavity 33 in deduster expansion section through divergent segment, the expansion section wall of deduster constitutes flow cavity 33 with inner annular outer baffle 14, flue gas contacts with the filter core 30 in cartridge support frame 29 after flow cavity 33, and filter core 30 is activated carbon cartridge.Annular outer baffle 14 to together constitute the gas flow path on filter core 30 with cinder catcher outer wall 18 and cinder catcher inwall 19 together with annular Internal baffle 15, be provided with sealing ring 21 between filter core 30 and cinder catcher outer wall 18, enter cinder catcher 34 in order to prevent gas without filter core 30.Particle in gas, noxious material are by filter core 30 adsorption filtration, and purified gas enters discharge chamber 32 and discharges deduster after filter core 30 filters.Filter core 30 particle that meeting be filtered at surface deposition one deck of filter core during filtering of annular, the particle 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 flue gas enters deduster from deduster entrance 11, as previously mentioned, most flue gas enters in flow cavity 33 and enters filtration stage under fluid dividing cover 12 guides, in addition, have sub-fraction flue gas to clash into fluid dividing cover 12 to flow downward along fluid dividing cover 12 afterwards, strike blade 28 fixing on cartridge support frame 29 top top board 39, cartridge support 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, flue gas impact blades 28, blade 28 drives cartridge support frame 29 to rotate while move downward in the support of spiral slide with under guiding.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 close contact, filter core 30 and cinder catcher outer wall 18 leave certain space, the interior close cinder catcher arrival end of annular cinder catcher outer wall 18 first correspondence is provided with two panels scraper 22, filter core 30 pressed close to by scraper 22, hairbrush 23 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, and under the acting in conjunction of hairbrush 23 and nozzle 24, remove the particle of filter core 30 adsorption filtration subsequently further, filter core 30 is regenerated under the process of multiple regenerative means.The impurity be removed falls into bottom cinder catcher 34, runs up to and is to a certain degree discharged outside deduster by unloading valve 26 afterwards.The amount of the inner dust stratification of cinder catcher 34 can by automatic detection means detections such as particle sensor detections.
See Fig. 3, the lower circumference of fluid dividing cover 12 is fixedly connected with annular Internal baffle 15, bracing frame 29 rotates around annular Internal baffle 15 and declines, base plate 40 bottom bracing frame 29 is connected with buffer unit 27, buffer unit is preferably damper rod, and the other end of buffer unit 27 is fixed on the back-up block 20 on cinder catcher inwall.The effect of buffer unit 27 is the decrease speeds controlling bracing frame 29, prevents decline too fast.The position of buffer unit 27 and quantity can be selected as required, certainly not stop that nozzle 24 is advisable, are only the existence in order to show buffer unit 27 in Fig. 3, and and the relative position of non-limiting buffer unit 27 and nozzle 24.Certainly, other also can be adopted to have the device of similar functions, such as hydraulic stem, spring etc.In addition, the decrease speed of bracing frame 29 also can be regulated by the blade 28 arranging varying number and angle, the quantity of the present embodiment Leaf is preferably 7, according to the flow velocity of flue gas, 7 blades can realize good rotary speed, also can by arranging less or more blade to reduce or to increase the decrease speed of bracing frame 29, can be such as 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, buffer unit can be controlled or other like is oppositely exerted pressure to bracing frame 29, such as stop air inlet, the buffer unit then compressed can impel bracing frame 29 reverse rotation rising to get back to initial duty, and move in circles work according to this.
See Fig. 5, this figure is the stereogram 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 sensor (not shown) in deduster to measure in deduster 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, after filter plate 31 filters, discharge deduster.The open and close of relief port 13 can by the close switch Long-distance Control at relief port place.When deduster runs, run into flow sometimes, flow velocity fluctuates larger input air-flow, run into the accident blocking of filter sometimes, when running into the similar situation making pressure in deduster increase, for ensureing that production safety can open relief port 13 to reduce rapidly the pressure in deduster, prevent the damage of filter core or deduster, due to the existence of filter 31, also can ensure the security of earial drainage gas.
See Fig. 6, this figure is the stereogram 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 multiple dead rings 38 of playing reinforcement effect, and the inwall of bracing frame 29 is fixed with spiral slide 36 and rotates around annular Internal baffle with guide support frame 29 and decline.The material of bracing frame 29 and spiral slide 36 can be the material arbitrarily with certain rigidity, such as stainless steel, plastics etc.
Flue gas is after absorption tower 1, deduster 10, and the acidic materials in gas and solid particulate matter and heavy metal are substantially all removed, and gas reaches discharge standard.
The absorption tower that purifier of the present invention uses, by unique gas distribution means, greatly improves distribution of gas effect and gas liquid contacting efficiency, significantly improves clean-up effect.The deduster used at work filter core constantly can carry out regeneration cycle use, and does not need extra operation power, only relies on the kinetic energy of flue gas self just can realize the regeneration of filter core.Due to the common coupling of absorption tower of the present invention and deduster, effectively eliminate the harmful substance of flue gas especially in medical refuse burning flue gas, achieve the clean discharge of flue gas.
Above-described embodiment is one of the present invention preferably scheme, not does any pro forma restriction to the present invention, also has other variant and remodeling under the prerequisite not exceeding the technical scheme described in claim.

Claims (7)

1. a smoke eliminator, comprise absorption tower (1) and deduster (10), it is characterized in that: absorption tower (1) has gas access (2), gas access (2) becomes multiple branch inlet (6) after entering absorption tower (1), branch inlet (6) is evenly distributed in absorption tower along oblique line from top to bottom, branch inlet distance gas access (2) of the top is nearest, and branch inlet distance gas access (2) of bottom farthest; Be equipped with the sprayer (5) of a correspondence on the top of each branch inlet, each sprayer (5) is 0.5-2m apart from the distance of corresponding branch inlet; The absorbing liquid that sprayer sprays is with falling into bottom absorption tower after smoke contacts, and absorbing liquid recycling spraying day with fog under the effect of circulating pump (7) of bottom continues to participate in absorbing;
Absorption tower (1) connects deduster 10 afterwards, deduster 10 comprises deduster entrance 11, fluid dividing cover 12, flue gas frontal impact is on the fluid dividing cover 12 of conically shaped body, most of flue gas enters the flow cavity 33 in deduster expansion section 17 through divergent segment 16 subsequently, flue gas contacts with the filter core 30 in cartridge support frame 29 after flow cavity 33, and gas enters discharge chamber 32 after filtering through filter core 30 and discharges deduster, sub-fraction flue gas flows downward along fluid dividing cover (12) after clashing into fluid dividing cover (12), strike the upper fixing 3-10 sheet blade (28) in cartridge support frame (29) top top board (39), cartridge support frame (29) inwall is provided with spiral slide (36), spiral slide (36) coordinates with the second spiral slide of annular Internal baffle (15) outer wall, flue gas impact blades (28), blade (28) drives cartridge support frame (29) to rotate along the second spiral slide while move downward, the base plate (40) of bracing frame (29) bottom is connected with buffer unit (27), the other end of buffer unit (27) is fixed on the back-up block (20) on cinder catcher inwall (19), 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) arrival end correspondence is provided with scraper (22), scraper (22) below 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, under the acting in conjunction of scraper (22), hairbrush (23) and nozzle (24), remove the particle of filter core (30) adsorption filtration, filter core (30) is regenerated.
2. smoke eliminator according to claim 1, is characterized in that: the quantity of branch inlet (6) is 4-8.
3. smoke eliminator according to claim 1, is characterized in that: the distance of sprayer (5) distance branch inlet (6) is 1-1.5m.
4. smoke eliminator according to claim 1, is characterized in that: the filter core (30) of deduster is activated carbon, polypropylene fibre, metallic fiber, glass fibre.
5. smoke eliminator according to claim 1, is characterized in that: the quantity of blade (28) is 7.
6. smoke eliminator according to claim 1, is characterized in that: buffer unit (27) is damper rod, hydraulic stem or spring, and its quantity is 2-8.
7. smoke eliminator according to claim 1, is characterized in that: fluid dividing cover (12) is provided with relief port (13).
CN201510106178.9A 2015-03-11 2015-03-11 A kind of smoke eliminator Expired - Fee Related CN104707468B (en)

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CN104707468B CN104707468B (en) 2016-08-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107930288A (en) * 2017-12-12 2018-04-20 王柱盛 A kind of smoke pipe filtration apparatus with automatic ash removing function
CN112305159A (en) * 2020-09-27 2021-02-02 联峰钢铁(张家港)有限公司 Carbon monoxide concentration detection device for converter flue gas channel
CN114618265A (en) * 2020-12-08 2022-06-14 Ace 技术有限公司 Solvent recovery apparatus and method for recovering solvent from solvent-containing air

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111672253A (en) * 2020-06-19 2020-09-18 扬州中康环保设备有限公司 Flue gas purification equipment with purifying effect detects function

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107930288A (en) * 2017-12-12 2018-04-20 王柱盛 A kind of smoke pipe filtration apparatus with automatic ash removing function
CN107930288B (en) * 2017-12-12 2020-06-16 江苏品德再生资源有限公司 Tobacco pipe filter equipment with automatic deashing function
CN112305159A (en) * 2020-09-27 2021-02-02 联峰钢铁(张家港)有限公司 Carbon monoxide concentration detection device for converter flue gas channel
CN114618265A (en) * 2020-12-08 2022-06-14 Ace 技术有限公司 Solvent recovery apparatus and method for recovering solvent from solvent-containing air

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