DE202022100222U1 - Low temperature catalytic double filter bag for denitration, dust removal and dioxin removal - Google Patents

Abstract

Low-temperature double catalytic filter bag for denitration, dedusting and dioxin removal, comprising a cage skeleton (1), characterized in that the outside of the cage skeleton (1) is covered with a catalytic filter bag (2), and the outside of the catalytic filter bag (2) with a PTFE film-coated filter bag (3), and ventilation grooves (4) are uniformly provided on the PTFE film-coated filter bag (3), and dust funnels are provided on the outside of the PTFE film-coated filter bag (3). (5) are uniformly arranged corresponding to the bottom of the ventilation groove (4), and wherein at the outer lower end of the PTFE film-coated filter bag (3) a collection bottom hopper (11) is arranged, and wherein between the dust hopper (5) and the Collecting bottom funnel (11) is connected to a collecting pipe (6), and a catalyst frame (7) is inserted inside the catalytic filter bag (2). hard, and a low-temperature SCR denitration catalyst is placed on the catalyst frame (7), and air holes (8) are uniformly provided on the surface of the catalyst frame (7), and connecting rods (9 ) are connected evenly and with a lifting eyelet (10) welded to the top of the connecting rod (9).

Description

TECHNICAL AREA

The present utility model relates to the technical field of filter bags, particularly a low-temperature catalytic double filter bag for denitration, dust collection and dioxin removal.

STATE OF THE ART

With the rapid development of power generation from waste incineration, emissions of nitrogen oxides, dioxins, dust and other air pollutants have also increased. Efficient removal of nitrogen oxides, dioxins and dust has also become urgently required for the waste incineration power generation industry. Waste incineration flue gas cleaning generally uses the traditional serial process of independently operating dedusting and denitration systems, which not only occupies a large space, but also has high investment and running costs. The common method of removing dioxins in the waste incineration industry is activated carbon adsorption, and this method is only a physical method, it can only adsorb dioxins but not remove them, and the activated carbon that adsorbed the dioxins needs secondary treatment.

In the case of a catalytic filter bag with convenient disassembly and assembly with the notice number in the Patent Bulletin ( CN210874566U ) the filter bag can be easily and quickly replaced with the filter bag holder to improve work efficiency. By adding chemical substances to the reaction filter bag, the filter bag can achieve chemical reaction filtration at the same time when filtering the materials.

However, the existing filter bags still lack the unique integrated treatment function for dust, nitrogen oxides and dioxins in flue gas, and the existing devices have the problems of large footprint and high investment and running costs.

CONTENTS OF THE PRESENT UTILITY MODEL

1. The technical problem to be solved

In view of the existing problems in the prior art, the present utility model aims to provide a low-temperature catalytic double filter bag for denitration, dedusting and dioxin removal, which can simultaneously remove dust, nitrogen oxides and dioxins in the flue gas and improve the efficiency of the conventional filter bag , to solve the problems of the traditional serial process of independent operation of dust collection and denitration systems that a large space is occupied and the investment and running costs are high.

2. Technical solution

• einen katalytischen Niedertemperatur-Doppelfilterbeutel zur Denitrierung, Entstaubung und Dioxinentfernung, umfassend ein Käfigskelett, wobei die Außenseite des Käfigskeletts mit einem katalytischen Filterbeutel ummantelt ist, und wobei die Außenseite des katalytischen Filterbeutels mit einem mit PTFE-Film beschichteten Filterbeutel ummantelt ist, und wobei an dem mit PTFE-Film beschichteten Filterbeutel Belüftungsnuten gleichmäßig vorgesehen sind, und wobei an der Außenseite des mit PTFE-Film beschichteten Filterbeutels Staubtrichter dem Boden der Belüftungsnut entsprechend gleichmäßig angeordnet sind, und wobei an dem äußeren unteren Ende des mit PTFE-Film beschichteten Filterbeutels ein Sammelbodentrichter angeordnet ist, und wobei zwischen dem Staubtrichter und dem Sammelbodentrichter ein Sammelrohr geschaltet ist, und wobei ins Innere des katalytischen Filterbeutels ein Katalysatorrahmen eingeführt ist, und wobei an dem Katalysatorrahmen ein Niedertemperatur-SCR-Denitrierungskatalysator platziert ist, und wobei an der Oberfläche des Katalysatorrahmens Luftöffnungen gleichmäßig vorgesehen sind, und wobei ans Innere des Katalysatorrahmens Verbindungsstangen gleichmäßig angeschlossen sind, und wobei am Oberteil der Verbindungsstange eine Hebeöse angeschweißt ist.

In order to solve the above technical problems, the present utility model adopts the following technical solution:

• a low-temperature double catalytic filter bag for denitration, dedusting and dioxin removal, comprising a cage skeleton, the outside of the cage skeleton being covered with a catalytic filter bag, and the outside of the catalytic filter bag being covered with a PTFE film-coated filter bag, and wherein at the ventilation grooves are evenly provided in the PTFE film-coated filter bag, and on the outside of the PTFE film-coated filter bag, dust hoppers are evenly arranged corresponding to the bottom of the ventilation groove, and at the outer lower end of the PTFE film-coated filter bag, a collecting bottom hopper is arranged and wherein a collecting pipe is connected between the dust hopper and the collecting tray hopper, and wherein a catalyst frame is inserted inside the catalytic filter bag, and on the catalyst frame a low-temperature SCR denitration catalyst ysator, and air holes are provided uniformly on the surface of the catalyst frame, and connecting rods are connected uniformly to the inside of the catalyst frame, and a lifting eyelet is welded to the top of the connecting rod.

Preferably, the dust hoppers and the headers are each provided in a number of 3, with the lengths of the three headers gradually decreasing.

An apron is preferably arranged on the upper part of the collection tray funnel.

The ventilation groove is preferably tapered, with the tapered end of the ventilation groove corresponding to the middle position of the cage skeleton.

Preferably, the connecting rods are provided in a number of 4, the conn rod and the catalyst frame are fixed and connected by a cap.

Through-grooves are preferably provided uniformly on the inside of the cage skeleton, with a drainage hole being provided on the underside of the cage skeleton.

Preferably, the dust hopper is in the form of a tapered ring with a wider top and narrower bottom, the surface of the dust hopper being coated with an anti-corrosion coating.

3. Benefits

• (1) in der vorliegenden Lösung sind ein katalytischer Filterbeutel und ein mit PTFE-Film beschichteter Filterbeutel angeordnet, um gleichzeitig Staub, Stickoxide und Dioxine im Rauchgas zu entfernen und die Effizienz des herkömmlichen Filterbeutels zu verbessern, auf die Weise werden die Probleme des traditionellen Serienprozesses des unabhängigen Betriebs von Entstaubungs- und Denitrierungssystemen, dass ein großen Raum belegt wird und die Investitions- und Betriebskosten hoch sind, und das durch die herkömmliche Verwendung der Aktivkohle zum Adsorbieren von Dioxinen verursachte Problem der sekundären Behandlung gelöst;
• (2) in der vorliegenden Lösung sind ein Staubtrichter, ein Sammelrohr und ein Sammelbodentrichter angeordnet, um den an der Außenseite des mit PTFE-Film beschichteten Filterbeutels abgetrennten Staub zu sammeln und einheitlich zu behandeln, wodurch die Bequemlichkeit der Vorrichtung zum Sammeln und Behandeln von Staub verbessert wird;
• (3) in der vorliegenden Lösung sind ein Katalysatorrahmen und eine Verbindungsstange angeordnet, um die Kontaktfläche zwischen dem Rauchgas und dem Katalysator zu vergrößern und die Gründlichkeit der katalytischen Reaktion des Rauchgases sicherzustellen, gleichzeitig wird es erleichtert, den Katalysatorrahmen aus dem Inneren des katalytischen Filterbeutels zur Wartung herauszunehmen.

Compared to the prior art, the present utility model has the following advantages:

• (1) In the present solution, a catalytic filter bag and a PTFE film-coated filter bag are arranged to simultaneously remove dust, nitrogen oxides and dioxins in the flue gas and improve the efficiency of the traditional filter bag, thus solving the problems of the traditional serial process the independent operation of dedusting and denitration systems that occupies a large space and the investment and running costs are high, and solved the secondary treatment problem caused by the conventional use of the activated carbon to adsorb dioxins;
• (2) in the present solution, a dust hopper, a collection pipe and a collection bottom hopper are arranged to collect and treat the dust separated on the outside of the PTFE film-coated filter bag uniformly, thereby improving the convenience of the dust collecting and treating device is improved;
• (3) In the present solution, a catalyst frame and a connecting rod are arranged to increase the contact area between the flue gas and the catalyst and ensure the thoroughness of the catalytic reaction of the flue gas, at the same time, it is easier to remove the catalyst frame from the inside of the catalytic filter bag take out maintenance.

character list

• 1 Fig. 12 shows a schematic diagram of the overall structure of the device of the present utility model.
• 2 Fig. 12 shows a schematic cross-sectional view of a catalytic filter bag according to the present utility model 1 .
• 3 12 shows a schematic diagram of the mounting structure of a catalyst frame according to the present utility model 2 .
• 4 12 shows a schematic structural view of a catalyst frame according to the present utility model 3 .
• 5 12 shows a schematic diagram of the assembly structure of a dust hopper according to the present utility model 1 .

Reference List

1

cage skeleton

2

Catalytic filter bag

3

Filter bag coated with PTFE film

4

ventilation groove

5

dust funnel

6

collection tube

7

catalyst frame

8th

air vent

9

connecting rod

10

lifting eye

11

collecting tray funnel

12

apron

DETAILED DESCRIPTION

In connection with figures in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model are explained clearly and fully in the following. Obviously, the illustrated embodiments do not represent all embodiments, but only a part of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments in the present utility model without creative works should be considered as being within the scope of the present utility model.

Example 1

Please refer 1 until 5 , a low-temperature catalytic double filter bag for denitration, dust removal and dioxin removal, comprising a cage skeleton 1, the outside of the cage skeleton 1 being covered with a catalytic filter bag 2 telt, and the outside of the catalytic filter bag 2 is covered with a PTFE film-coated filter bag 3, and ventilation grooves 4 are uniformly provided on the PTFE film-coated filter bag 3, and the outside of the PTFE film-coated filter bag coated filter bag 3 dust hopper 5 are evenly arranged corresponding to the bottom of the ventilation groove 4, and at the outer lower end of the PTFE film-coated filter bag 3 a collecting tray hopper 11 is arranged, and between the dust hopper 5 and the collecting tray hopper 11 a collecting pipe 6 is connected and wherein a catalyst frame 7 is inserted into the inside of the catalytic filter bag 2, and a low-temperature SCR denitration catalyst is placed on the catalyst frame 7, and air holes 8 are uniformly provided on the surface of the catalyst frame 7, and wherein the inside of the catalyst frame 7 connecting rods 9 are evenly connected, and at the top of the connecting rod 9 a lifting eyelet 10 is welded. Before denitration and dust removal, the hydrated lime is pre-sprayed on the outside of the PTFE film-coated filter bag 3, when the flue gas carrying dust and impurities passes through the PTFE film-coated filter bag 3, a filter cake is formed on the surface of the with PTFE film coated filter bag 3 is formed to collect dust, and through the dust hopper 5, collecting pipe 6 and collecting tray hopper 11, the falling dust can be collected, when the impurities enter the inside of the catalytic filter bag 2 through the ventilation groove 4, nitrogen oxides become under Effect of the low-temperature SCR denitration catalyst on the catalyst frame 7 is reduced to harmless nitrogen and water, and dioxins are decomposed under the effect of the low-temperature SCR denitration catalyst to generate carbon dioxide, water and hydrogen chloride with the arrangement of the air holes 8 on the catalyst frame 7 the account The contact area between the impurities and the catalyst is increased, and the connecting rod 9 makes it easier to take out the entire catalyst frame 7 for maintenance, thereby achieving convenient maintenance of the catalytic filter bag 2, at the end of the device can eliminate dust, nitrogen oxides and dioxins in the flue gas can be removed at the same time and the efficiency of the conventional filter bag can be improved, thus solving the problems of the traditional serial process of independently operating dedusting and denitrating systems that occupies a large space and the investment and running costs are high, through the conventional use The secondary treatment problem caused by the activated carbon for adsorbing dioxins is solved.

Please refer 1 and 5 , the dust hopper 5 and the collecting pipes 6 are each provided in a number of 3, with the lengths of the three collecting pipes 6 gradually decreasing, through the collecting pipes 6, the dust collected in the dust hopper 5 can be discharged into the inside of the collecting tray hopper 11, so that the operators can handle the dust uniformly.

Please refer 5 , a skirt 12 is disposed at the top of the collecting tray hopper 11 to increase the collecting capacity of the collecting tray hopper 11 .

Please refer 2 , the ventilation groove 4 is tapered in order to prevent the occurrence of a dust clogging phenomenon in the ventilation groove 4, with the tapered end of the ventilation groove 4 corresponding to the center position of the cage skeleton 1.

Please refer 3 and 4 , the connecting rods 9 are provided in a number of 4 to ensure the stability of the insertion and placement of the catalyst frame 7 inside the catalytic filter bag 2, the connecting rod 9 and the catalyst frame 7 being fixed and connected by a cap.

Please refer 2 , through-grooves are uniformly provided on the inside of the cage skeleton 1, with a drainage hole provided on the underside of the cage skeleton 1, through the through-groove, the treated flue gas is discharged to the outside, through the drainage hole, the water content generated by the catalysis can be discharged to the outside.

Please refer 5 , the dust hopper 5 is designed in the form of a tapered ring with a wider top and a narrower bottom to reduce the overflow of dust and increase the effective life of the dust hopper 5, and the surface of the dust hopper 5 is coated with anti-corrosion coating.

In use, before denitration and dust removal, the hydrated lime is pre-sprayed on the outside of the PTFE film-coated filter bag 3, when the flue gas carrying dust and impurities passes through the PTFE film-coated filter bag 3, a filter cake is formed at the Surface of the filter bag 3 coated with PTFE film formed to catch dust, and through the dust hopper 5, the collecting pipe 6 and the collecting tray hopper 11, the falling dust can be collected when the impurities enter the inside of the catalytic filter bag 2 through the ventilation groove 4, are nitrogen oxides under the action of the low-temperature SCR denitration catalyst on the Catalyst frame 7 is reduced to harmless nitrogen and water, and dioxins are decomposed under the action of the low-temperature SCR denitration catalyst to produce carbon dioxide, water and hydrogen chloride, with the arrangement of the air holes 8 on the catalyst frame 7, the contact area between the impurities and the catalyst is increased , and the connecting rod 9 makes it easier to take out the whole catalyst frame 7 for maintenance, in the end, the device can remove dust, nitrogen oxides and dioxins in the flue gas at the same time, and improve the efficiency of the conventional filter bag.

The above content only represents preferred specific embodiments of the present utility model, but the scope of protection of the present utility model is not limited thereto. Those skilled in the art who are familiar with this technical field can make equivalent replacements or changes according to the technical solutions of the present utility model in the technical scope disclosed by the present utility model, and these equivalent replacements or changes are considered to be covered by the protective scope of the present utility model will.

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• CN 210874566 U [0003]

Claims (7)

Low-temperature double catalytic filter bag for denitration, dedusting and dioxin removal, comprising a cage skeleton (1), characterized in that the outside of the cage skeleton (1) is covered with a catalytic filter bag (2), and the outside of the catalytic filter bag (2) with a PTFE film-coated filter bag (3), and ventilation grooves (4) are uniformly provided on the PTFE film-coated filter bag (3), and dust funnels are provided on the outside of the PTFE film-coated filter bag (3). (5) are uniformly arranged corresponding to the bottom of the ventilation groove (4), and wherein at the outer lower end of the PTFE film-coated filter bag (3) a collection bottom hopper (11) is arranged, and wherein between the dust hopper (5) and the Collection bottom funnel (11) is connected to a collection tube (6), and wherein inside the catalytic filter bag (2) a catalyst frame (7) inserted and wherein a low-temperature SCR denitration catalyst is placed on the catalyst frame (7), and air holes (8) are uniformly provided on the surface of the catalyst frame (7), and connecting rods (9 ) are evenly connected and a lifting eye (10) is welded to the top of the connecting rod (9). Low temperature catalytic double filter bag for denitration, dedusting and dioxin removal after claim 1 characterized in that the dust hoppers (5) and the headers (6) are each provided in a number of 3, the lengths of the three headers (6) gradually decreasing. Low temperature catalytic double filter bag for denitration, dedusting and dioxin removal after claim 1 , characterized in that an apron (12) is arranged on the upper part of the collecting floor funnel (11). Low temperature catalytic double filter bag for denitration, dedusting and dioxin removal after claim 1 , characterized in that the ventilation groove (4) is tapered, the tapered end of the ventilation groove (4) corresponding to the central position of the cage skeleton (1). Low temperature catalytic double filter bag for denitration, dedusting and dioxin removal after claim 1 characterized in that the connecting rods (9) are provided in a number of 4, wherein the connecting rod (9) and the catalyst frame (7) are fixed and connected by a cap. Low temperature catalytic double filter bag for denitration, dedusting and dioxin removal after claim 1 , characterized in that on the inside of the cage skeleton (1) through grooves are provided uniformly, wherein a drainage hole is provided on the underside of the cage skeleton (1). Low temperature catalytic double filter bag for denitration, dedusting and dioxin removal after claim 1 , characterized in that the dust hopper (5) is in the form of a tapered ring with a wider upper part and a narrower lower part, the surface of the dust hopper (5) being coated with an anti-corrosion coating.

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