CN209828498U

CN209828498U - Cloth bag system for catalytic degradation of dioxins POPs

Info

Publication number: CN209828498U
Application number: CN201920378037.6U
Authority: CN
Inventors: 盛守祥; 陈恒飞; 吴昊; 孙建光; 马德庆; 许燕; 刘海生
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2019-12-24
Anticipated expiration: 2029-03-27

Abstract

The utility model provides a catalytic degradation dioxin class POPs sack system, including heater and sack cleaner used sack in the sack cleaner on loaded vanadium tungsten titanium type catalyst or manganese oxide type or rare earth element catalyst etc. catalyst load capacity scope is 50-400g/m on the sack²And monitoring the temperature and dust content at the inlet and outlet of the bag-type dust collectorAnd regulating and controlling parameters such as temperature and the like of the bag-type dust collector. The utility model discloses catalysis sack system can degrade dioxin class POPs pollutant under low temperature condition (160-.

Description

Cloth bag system for catalytic degradation of dioxins POPs

Technical Field

The utility model relates to a catalytic degradation dioxin POPs class sack system belongs to POPs emission reduction technical field in the flue gas.

Background

Dioxin POPs contain a wide variety of substances, and include a series of compounds such as dioxin, polychlorinated biphenyl, HCB, heptachloro and the like. These substances have lipophilic property, can accumulate in adipose tissue and enter human body through food chain, and dioxin POPs have high toxicity and are harmful to reproductive system, nervous system, etc. Dioxin POPs are organic substances which are very difficult to degrade, high temperature of more than 800 ℃ is usually required for destroying the chemical molecular structure of the dioxin POPs under the gas phase condition, and high energy consumption is caused, and dioxin POPs substances can be generated in the incineration process of various industries, such as garbage incineration, hazardous waste incineration and the like.

At present, dioxin POPs in flue gas are mainly removed by an activated carbon adsorption process, but the process only transfers harmful substances in gas state into fly ash and does not eliminate the harmful substances, and a cloth bag mainly adsorbs dioxin on fly ash particles in the flue gas, but has poor effect on gas phase suspended dioxin. Therefore, a catalytic degradation process (SCR) is generated, although the catalytic degradation process is technically feasible for dioxin POPs, the dioxin POPs in the flue gas can be thoroughly degraded into water and inorganic salts, and the degradation of harmful substances is thoroughly realized, but a catalytic device needs to be rebuilt, the operation cost of an enterprise is invisibly increased, and the SCR is not widely developed at home. The catalytic degradation and the cloth bag are combined, the existing cloth bag dust removal system can be utilized, no additional facilities need to be built by enterprises, dust removal and degradation of harmful substances of dioxin POPs can be realized simultaneously, and the optimization of the catalytic cloth bag system is the current research direction.

Disclosure of Invention

The utility model discloses a solve the energy consumption that exists in the current dioxin type POPs degradation technique higher, can not thoroughly degrade, polluted environment, the higher scheduling problem of capital construction investment cost, and then provide a catalytic degradation dioxin POPs sack system, can utilize the current sack dust collector of technology, simple to operate need not higher secondary capital input, the utility model provides a following technical scheme:

a cloth bag system for catalytic degradation of dioxins POPs comprises a heater 1, an inlet dust monitor 21, an outlet dust monitor 22, a temperature monitor 3, a switch 4, a cloth bag dust remover 5, a catalytic cloth bag 6 and a sound wave soot blower 7.

Specifically, the catalytic cloth bag is a supported vanadium-tungsten-titanium catalyst or a manganese oxide type or rare earth catalyst or a catalyst with a degradation effect on dioxin POPs, and the supported amount of the catalyst on the cloth bag is 50-400g/m²。

Specifically, the temperature control logic of the bag system for catalytic degradation of dioxins POPs is that the temperature monitor 3 monitors the temperature of the flue gas entering the bag-type dust collector 5, when the temperature monitored by the temperature monitor 3 is lower than 160 ℃, the heater 1 is linked to heat the flue gas, and when the temperature monitored by the temperature monitor 3 is higher than 160 ℃, the heater 1 stops heating.

Specifically, the control logic of the dust in the flue gas of the bag system for catalytically degrading dioxins POPs is that concentration values of the dust in the flue gas monitored by the inlet dust monitor 21 and the outlet dust monitor 22 are respectively C1 and C2, the dust removal efficiency value is V = (C1-C2)/C1%, when V is less than 95%, the sound wave soot blower 7 is started to remove dust from the catalytic bag 6, the dust filtration efficiency is improved, and when V is more than 95%, the sound wave soot blower 7 stops operating.

Specifically, when more fly ash falls to the bottom in the bag-closing dust collector 5, the fly ash is regulated and controlled through the switch 4.

The utility model provides a technical scheme can be applicable to the enterprise that produces dioxin class POPs in the flue gas, the utility model discloses a catalysis sack system can utilize current sack dust pelletizing system, only needs to change control logic such as sack type and temperature, just can degrade dioxin class POPs pollutant, has the lower, better characteristics of degradation effect of energy consumption, has wide application prospect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a cloth bag system for catalytic degradation of dioxin-like POPs according to the present embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model provides a technical scheme is based on dioxin class POPs in catalysts degradation flue gas such as vanadium, titanium, manganese, integrates it to the sack, degrades dioxin class POPs in the flue gas.

Case 1

Taking the catalytic degradation of dioxin POPs in the flue gas of a certain waste incineration plant as an example:

consists of the following components: SO (SO)₂：500mg/m³；NO_X：300mg/m³(ii) a Dioxin: 4 ngTEQ; particulate matter: less than or equal to 1000mg/m³；

The inlet air temperature: 163 ℃ C.

The embodiment provides a cloth bag system for catalytic degradation of dioxin POPsThe catalyst loaded on the systematic catalysis cloth bag 6 is V₂O₅-WO₃/TiO₂The loading amount of the cloth bag catalyst is 100g/m²And 1% of Pt of noble metal.

The cloth bag system for catalytic degradation of dioxin POPs provided by the specific embodiment has the working principle that: the flue gas enters a heater 1 and enters a bag-type dust collector 5, the inlet air temperature is 163 ℃, when the temperature monitored by a temperature monitor 3 is more than 160 ℃, the heater 1 stops heating, the flue gas passes through a catalytic bag 6 to achieve dust removal and catalytic degradation of dioxin in the flue gas, the flue gas after reaction is discharged, and the concentration values of dust in the flue gas monitored by an inlet dust monitor 21 and an outlet dust monitor 22 are respectively C1=90 mg/m³And C2=40mg/m³And when the dust removal efficiency value is V = (C1-C2)/C1 =96%, and the sound wave soot blower is not operated when the dust removal efficiency value is larger than 95%.

NOx in the exhaust gas after degradation: less than or equal to 40mg/m³(ii) a Dioxin: not more than 0.5 ngTEQ/m³(ii) a Particulate matter: less than or equal to 40mg/m³。

Case 2

Taking the catalytic degradation of dioxin in the incineration flue gas of certain hazardous wastes as an example, the state of the flue gas is as follows:

consists of the following components: SO (SO)₂：800mg/m³；NO_X：800mg/m³(ii) a Dioxin: 6 ngTEQ; particulate matter: less than or equal to 1200mg/m³；

The inlet air temperature: 80 ℃.

The cloth bag system for catalytic degradation of dioxin POPs provided by the specific embodiment has V as a catalyst loaded on the catalytic cloth bag 6₂O₅-WO₃/TiO₂The loading capacity of the bag catalyst is 150g/m²。

The cloth bag system for catalytic degradation of dioxin POPs provided by the specific embodiment has the working principle that: the flue gas enters a heater 1 and enters a bag-type dust collector 5, the inlet air temperature is 80 ℃, when the temperature monitored by a temperature monitor 3 is less than 160 ℃, the heater 1 works to heat the flue gas, the heated flue gas reaches more than 160 ℃, the flue gas passes through a catalysis cloth bag 6 to remove dust and catalyze and degrade dioxin in the flue gas, and the flue gas after reactionThe gas was discharged, and after 24 hours of reaction, the concentration values of dust in the flue gas monitored by the inlet dust monitor 21 and the outlet dust monitor 22 were C1=1100 mg/m, respectively³And C2=200mg/m³And when the dust removal efficiency value is V = (C1-C2)/C1 =82%, and when the dust removal efficiency value is less than 95%, the sound wave soot blower works to blow soot on the cloth bag, so that the specific surface area of the catalyst in unit volume can be increased, and the full contact with the flue gas is ensured.

NOx in the exhaust gas after degradation: less than or equal to 50mg/m³(ii) a Dioxin: not more than 0.5 ngTEQ/m³(ii) a Particulate matter: less than or equal to 40mg/m³。

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the embodiments of the present invention are all covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A cloth bag system for catalytic degradation of dioxins POPs is characterized in that: comprises a heater (1), an inlet dust monitor (21), an outlet dust monitor (22), a temperature monitor (3), a switch (4), a bag-type dust remover (5), a catalysis bag (6) and a sound wave soot blower (7).

2. The cloth bag system for catalytic degradation of POPs (persistent organic pollutants) of dioxin type according to claim 1, wherein the catalytic cloth bag is loaded with a catalyst capable of catalytic degradation of POPs of dioxin type, the catalyst is a vanadium-tungsten-titanium type catalyst or a manganese oxide type or a rare earth type catalyst or a catalyst having a degradation effect on POPs of dioxin type, and the loading amount of the catalyst on the cloth bag is in the range of 50-400g/m²。

3. The cloth bag system for catalytic degradation of POPs (pollutants) of dioxin and similar substances according to claim 1, wherein the temperature monitor (3) monitors the temperature of the flue gas entering the cloth bag dust collector (5), the heater (1) is linked to heat the flue gas when the temperature monitored by the temperature monitor (3) is lower than 160 ℃, and the heater (1) stops heating when the temperature monitored by the temperature monitor (3) is higher than 160 ℃.

4. The cloth bag system for catalytic degradation of POPs (POPs) of dioxin type according to claim 1, wherein the concentration values of dust in flue gas monitored by the inlet dust monitor (21) and the outlet dust monitor (22) are respectively C1 and C2, the dust collection efficiency value is V = (C1-C2)/C1%, when V is less than 95%, the sound wave soot blower (7) is started to remove dust from the catalytic cloth bag (6), the dust filtration efficiency is improved, and when V is more than 95%, the sound wave soot blower (7) stops operating.

5. The cloth bag system for catalytic degradation of POPs (pollutants) of dioxin and similar substances according to claim 1, wherein the switch (4) is used for regulating and controlling a fly ash collector falling to the bottom in the cloth bag dust remover (5).

6. The cloth bag system for catalytic degradation of dioxin-like POPs according to claim 1, wherein the dioxin-like POPs contain a wide variety of substances including dioxin, polychlorinated biphenyl, HCB, heptachloro and other persistent organic pollutants.