CN1283952C - Incinerated tail gas purifying method and purifying equipment based on dry type cloth bag reactor - Google Patents
Incinerated tail gas purifying method and purifying equipment based on dry type cloth bag reactor Download PDFInfo
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- CN1283952C CN1283952C CN 200410086709 CN200410086709A CN1283952C CN 1283952 C CN1283952 C CN 1283952C CN 200410086709 CN200410086709 CN 200410086709 CN 200410086709 A CN200410086709 A CN 200410086709A CN 1283952 C CN1283952 C CN 1283952C
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- sack cleaner
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Abstract
The present invention relates to a method and a device for purifying combusted tail gas based on a dry type cloth bag reactor, which belongs to the technical field of combusting solid waste. The method comprises the steps that the temperature of high-temperature smoke gas to be purified is dropped to lower than 200 DEG C after passing through a quench tower; then the smoke gas is fully mixed with powdery absorbent to neutralize acidic gas; heavy metals and dioxin kind of pollutants are adsorbed. Products are intercepted and filtered by a cloth bag dust remover; tail gas after purified is discharged from the cloth bag dust remover. The device comprises four parts: a high-temperature smoke gas quench tower, a powder-spraying device, an adsorption tower and a cloth bag dust removal system, wherein the parts have the connection relation that a discharging pipeline of the high-temperature smoke gas quench tower is connected with the bottom of the adsorption tower; a horizontal pipe section at the lower part of the discharging pipeline is connected with a vertical output pipeline of the powder-spraying device; a discharging pipeline of the adsorption tower is connected with an inlet of the cloth bag dust remover. The present invention can effectively neutralize acidic gas with high concentration, and simultaneously can effectively enhance the service life and the purification efficiency of the cloth bag dust remover.
Description
Technical field
The invention belongs to the solid waste burning processing technology field, particularly be applicable to a kind of purification techniques that contains volatile heavy metal pollutant (comprising Hg, Cd, Pb etc.) and extremely toxic substance dioxin pollution thing in the incinerator discharging flue gases such as house refuse, medical waste and industrial solid wastes.
Background technology
Along with quickening of urbanization process and constant development of economy, house refuse, medical waste and industrial solid wastes (rubbish is called for short in the back) generation increases day by day, brings very big pressure to ecological environment.Burning method is owing to have advantages such as minimizing, innoxious and energy recovery and be used widely gradually.Yet waste incineration produces secondary pollution problem and can not be ignored.The secondary pollution that waste incineration produces mainly concentrates on sour gas HCl, heavy metal and dioxin pollution thing.Sour gas generally adopts the method for wet method, semidry method to remove, because gas liquid reaction speed is fast, removal effect is good, and the acid-base neutralization reaction can guarantee that the concentration of emission of sour gas is reduced to limit value.Wet method can only be transferred to the dissolubility heavy metal in the waste liquid and go, also need deal carefully with, on the other hand, and dioxin pollution thing water-soluble very low, wet method is little to its removal effect.And semidry method pulping system complexity, conveying circuit is out of order easily, if spray effect is not good, the sack cleaner filter cloth is subjected to wet waste gas and reduces service life, therefore to the removal existence and the similar defective of wet method of heavy metal and dioxin pollution thing.
Facts have proved that in the waste incineration process, volatilization heavy metal (comprising Hg, Cd, Pb etc.) of attitude and dioxin pollution thing etc. are enriched on the submicron particles such as flying dust easily, can remove effectively by dry method.In theory, solid absorbents such as active carbon are sprayed into after the flue, submicron particles will form coarse granule by effects such as physical absorption and chemical reactions, enters sack cleaner again and is effectively caught.But the price comparison costliness of active carbon, processing cost is higher.People attempt to utilize low-cost sorbents such as lime, kaolin, dolomite, calcite to substitute experiment, found that, because the time of contact of solid and gas is limited and mass transfer effect is not good, palpus excess dosing often, the consumption of medicament is big, and whole removal efficient is also lower.
Summary of the invention
The objective of the invention is for overcoming the existing low shortcoming of dry process effect, Gu it is limited and mass transfer effect is not good to solve time of contact between solid-particle, can't give full play to the adsorbing problem of adsorbent, a kind of incineration tail gas purification method and purifier based on dry type cloth bag reactor is provided, had that investment cost is low, treatment effeciency is high, an advantage such as simple to operate, convenient management.
A kind of incineration tail gas purification method based on dry type cloth bag reactor that the present invention proposes may further comprise the steps:
1) high-temperature flue gas to be clean is reduced to temperature below 200 ℃ by quench tower, to avoid the synthetic again of dioxin pollution thing;
2) flue gas and the powder adsorbent after will lowering the temperature is fully mixed, and sour gas wherein is neutralized, and heavy metal and dioxin pollution thing are adsorbed;
3) product that is adsorbed is tackled and is filtered by sack cleaner, and the tail gas after the purification is discharged from sack cleaner.
The present invention realizes that above-mentioned purification method has designed a kind of incineration tail gas purifier based on dry type cloth bag reactor, it is characterized in that, comprises high-temperature flue gas quench tower, dusting device, adsorption tower and four parts of bag-type dust removal system; The annexation of each several part is: the discharge line of high-temperature flue gas quench tower links to each other with the adsorption tower bottom, and wherein the lower horizontal pipeline section of this discharge line is connected with the vertical output pipeline of dusting device, and the adsorption tower discharge line links to each other with the import of sack cleaner.The tail gas of the outlet of sack cleaner can be discharged by the chimney through linking to each other, and the sack cleaner bottom is provided with the storage ash bucket.
Above-mentioned dusting device is made of storage powder groove and defeated powder blower fan, and this storage powder trench bottom is provided with screw feeder.
Above-mentioned sack cleaner lower part outlet also can link to each other with air-introduced machine;
Upper inlet, lower part outlet place at sack cleaner also can be separately installed with mass-flow gas meter.
The device of above-mentioned each part of the present invention is conventional products.
Operation principle of the present invention is: high-temperature flue gas is through water spray quench tower (inside is provided with the good shower nozzle of atomizing effect), can fully be cooled to below 200 ℃, the powder transmitter adopts compressed air, adsorbent (as Ca-base adsorbent) in the storage powder groove is sprayed in the adsorption tower, the adsorption tower internal diameter is 3 times of adsorption tower bottom inlet caliber, according to formula
(wherein Q is a gas flow, d is an internal diameter, v is a gas flow rate), when flow one timing, gas flow rate and caliber square are inversely proportional to, therefore velocity of flue gas enters and reduces to original 1/9 after the adsorption tower, it is original 9 times that flue gas increased in the time of staying of adsorption tower, powder granule is able to fully mix with flue gas at short notice, and powder granule is in fluidized state, can carry out quick neutralization reaction with sour gas, with heavy metal and dioxin pollution thing generation suction-operated, sack cleaner is owing to hold back, inertial collision, static, absorbent particles and absorption heavy metal and dioxin pollution thing thereon can be further held back in effects such as diffusion.Mass-flow gas meter can be used for controlling flue gas flow, determines adsorbent consumption and check system air-tightness.The flying dust of sack cleaner interception enters the storage ash bucket through after the impulse hunting, handles.
The present invention also effectively improves the service life and the purification efficiency of sack cleaner when acid gas neutralizes to high concentration effectively, thereby is removed heavy metal and dioxin pollution thing in the incineration flue gas efficiently.Have that investment cost is low, treatment effeciency is high, advantage such as simple to operate, convenient management.
Description of drawings
Fig. 1 is the incineration tail gas cleaning equipment example structure schematic diagram based on dry type cloth bag reactor of the present invention.
The specific embodiment
Incineration tail gas purifier based on dry type cloth bag reactor of the present invention reaches accompanying drawing in conjunction with the embodiments and is described in detail as follows:
Present embodiment based on the structure of the incineration tail gas purifier of dry type cloth bag reactor as shown in Figure 1.The dusting device that it comprises high-temperature flue gas quench tower 1, adsorption tower 2, is made of defeated powder blower fan 3 and coupled storage powder groove 4, and 5 four parts of bag-type dust removal system; Wherein, the top outlet of quench tower 1 links to each other with adsorption tower 2 bottom inlet by the discharge line that is provided with flange K1, wherein this discharge line lower horizontal carries pipeline section to be connected with the vertical output pipeline of dusting device, defeated powder blower fan 3 adopts compressed air in the dusting device, storage powder groove 4 bottoms are provided with screw feeder 8, the adsorption tower top exit links to each other with the upper inlet of sack cleaner 5 by the discharge line that is provided with flange K2, sack cleaner 5 outlet at bottoms are provided with storage ash bucket 9, and sack cleaner 5 lower part outlets link to each other with air-introduced machine 6; Upper inlet and lower part outlet place at sack cleaner 5 also are separately installed with mass-flow gas meter 10.
Adopt the purification method of present embodiment to be: high-temperature flue gas is through water spray quench tower 1, utilize the heat of vaporization of atomized water fully to be cooled to below 200 ℃, defeated powder blower fan 3 will store up solid absorbent in the powder groove 4 and spray into horizontal conveying pipe and enter adsorption tower 2, adsorption tower is between quench tower 2 and sack cleaner 5, strengthened contacting of powder adsorbent and flue gas, strengthened the neutralization reaction of powder granule and sour gas and to the adsorption effect of heavy metal and dioxin pollution thing, in addition because the submicron order ash particle adsorbs into coarse granule with the adsorbent collision, be difficult to pass the cloth bag surface, therefore strengthened the separating effect of sack cleaner 5, flue gas is finally discharged through air-introduced machine 6.Mass-flow gas meter 10 can be controlled in order to flue gas flow, determines adsorbent consumption and check system air-tightness.The flying dust of sack cleaner 5 interceptions enters storage ash bucket 9 through after the impulse hunting, handles.
The present invention compares with existing incineration flue gas treatment system, has the following advantages:
(1) added the adsorption tower that caliber changes from small to big between quench tower and sack cleaner, flue gas flow rate becomes former Come 1/9, the time of staying is original 9 times, is conducive to flue gas powder granule and acidity in the adsorption tower uphill process Gas and heavy metal fully collide and adsorb, and have the function of removing simultaneously multiple pollutant, to sour gas and a huge sum of money The clearance of genus, dioxin pollution thing is all to more than 99.9%.
(2) owing to increase the time of contact between flue gas and the adsorbent, the adsorbent utilization ratio increases, and has greatly reduced Actual adsorbent dosage has reduced processing cost preferably.
(3) because wet waste gas is able to abundant removal in adsorption tower, it is wet useless to have guaranteed that the dry type cloth bag reactor filter cloth is not subjected to The impact of gas, increase service life.
Claims (4)
1, a kind of incineration tail gas purifier based on dry type cloth bag reactor is characterized in that, comprises high-temperature flue gas quench tower, dusting device, adsorption tower and four parts of bag-type dust removal system; The annexation of each several part is: the discharge line of high-temperature flue gas quench tower links to each other with the adsorption tower bottom, and wherein the lower horizontal pipeline section of this discharge line is connected with the vertical output pipeline of dusting device, and the adsorption tower discharge line links to each other with the import of sack cleaner.
2, purifier as claimed in claim 1 is characterized in that, described dusting device is made of storage powder groove and defeated powder blower fan, and this storage powder trench bottom is provided with screw feeder.
3, purifier as claimed in claim 1 is characterized in that, described sack cleaner lower part outlet links to each other with air-introduced machine.
4, purifier as claimed in claim 1 is characterized in that, the upper inlet of described sack cleaner, lower part outlet place are equipped with mass-flow gas meter respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410086709 CN1283952C (en) | 2004-10-29 | 2004-10-29 | Incinerated tail gas purifying method and purifying equipment based on dry type cloth bag reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410086709 CN1283952C (en) | 2004-10-29 | 2004-10-29 | Incinerated tail gas purifying method and purifying equipment based on dry type cloth bag reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1603687A CN1603687A (en) | 2005-04-06 |
| CN1283952C true CN1283952C (en) | 2006-11-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410086709 Expired - Fee Related CN1283952C (en) | 2004-10-29 | 2004-10-29 | Incinerated tail gas purifying method and purifying equipment based on dry type cloth bag reactor |
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| Country | Link |
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| CN (1) | CN1283952C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126519A (en) * | 2015-08-29 | 2015-12-09 | 华南理工大学 | Treatment system of smoke organic waste gas produced in circuit board disassembly |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20062524A1 (en) * | 2006-12-28 | 2008-06-29 | Itea Spa | PROCESS FOR PURIFICATION OF COMBUSTION FUMES |
| CN103157338B (en) * | 2012-12-19 | 2015-09-09 | 威海航泰环保设备有限公司 | Cremation machine all-dry-method posttreatment system |
| CN108043194B (en) * | 2016-01-11 | 2019-12-03 | 安徽金森源环保工程有限公司 | A kind of industrial refuse cracking incineration tail gas denitrating system |
| CN109821353A (en) * | 2019-04-04 | 2019-05-31 | 安徽海螺川崎工程有限公司 | A kind of solid waste main shop deodoration system |
| CN110906751A (en) * | 2019-12-05 | 2020-03-24 | 中冶华天南京工程技术有限公司 | Electric furnace flue gas quenching device |
-
2004
- 2004-10-29 CN CN 200410086709 patent/CN1283952C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126519A (en) * | 2015-08-29 | 2015-12-09 | 华南理工大学 | Treatment system of smoke organic waste gas produced in circuit board disassembly |
| CN105126519B (en) * | 2015-08-29 | 2017-12-01 | 华南理工大学 | A kind of wiring board disassembles the processing system of smog organic exhaust gas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1603687A (en) | 2005-04-06 |
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