KR20100131066A - Removing method for toxic gas using circulated catalyst and/or absorbent - Google Patents

Abstract

PURPOSE: A catalyst/adsorption powder rotational harmfulness gas removal method is provided to reduce the facility cost by using a catalyst and adsorption powder without replacing. CONSTITUTION: A catalyst/adsorption powder rotational harmfulness gas removal method comprises the following steps: collecting catalyst/adsorption powder to the surface of a filter(S1); inducing polluted gas to a reaction chamber; passing the polluted gas through the catalyst/adsorption powder(S2); backwashing the catalyst/adsorption powder for separating from the filter(S3); and heating the catalyst/adsorption powder inside a recycling chamber(S4,S5).

Description

Removing Method for Toxic Gas using Circulated Catalyst and / or Absorbent}

The present invention relates to a catalyst / adsorption powder circulating harmful gas removal method, and more particularly to the contamination containing harmful gas components such as nitrogen oxides, sulfur oxides, dioxins, VOCs in the filter / catalyst powder is collected on the surface By passing the gas through the catalyst / adsorption powder by adsorption and removal of harmful gas components contained in the polluted gas to receive a clean gas, the catalyst / adsorption powder after the harmful gas purification process is separated from the filter by backwashing, The separated catalyst / adsorption powder is subjected to high heat through the regeneration process to separate and remove the adsorbed noxious gas components from the catalyst / adsorption powder, and the regenerated catalyst / adsorption powder is circulated to the transfer gas to be collected again on the filter surface and then harmful. Catalyst / Adsorption that allows continuous use without replacing the catalyst / adsorbent powder by repeating the process of removing gaseous components It relates to a powder circulating harmful gas removal method.

In general, various harmful gases are included in the waste gas or the generated gas generated during product production, disposal or gasification. That is, various harmful gases such as nitrogen oxides (NOx), sulfur oxides (SOx), dioxins, and VOCs, which are inevitably generated in the plating process or incineration, or included in the gas produced in the exhaust gas and gasification reaction, are separately purified. Through the discharge or capture.

There are various methods of purifying the harmful gas, but typically, a method of passing the filter apparatus through the filter device and converting the harmful gas into the adsorbed or harmless gas is applied. That is, a method of including a catalyst material in the filter to convert gas or preparing a filter with an adsorbent material and removing the adsorbent is used.

Currently, most of them use a filter to which the above-mentioned adsorption method is applied, and the filter forms a plurality of waves to increase the surface area, thereby increasing the purification area by increasing the contact area with noxious gas.

This filter method has a high purification efficiency at the beginning, but the purification efficiency gradually decreases due to the limitation of the contact area, so that after a certain period of time, the purification of the harmful gas is performed by replacing the filter or performing a re-installation process. In other words, the toxic gas is adsorbed to the filter with saturation, so that the purification efficiency is lowered. In addition, it is necessary to replace the filter periodically because the powder contained in the transport gas hits the filter adsorbate to separate the adsorbed material. .

Therefore, there is a need for a new harmful gas removal method to solve the cumbersome filter replacement and make it semi-permanent use.

The catalyst / adsorption powder circulating harmful gas removal method of the present invention for solving the above problems,

The reaction chamber is provided with a reaction chamber including a reaction chamber in which upper and lower portions of the upper and lower parts are partitioned by a plurality of rod filters, and a reverse nozzle is installed, a regeneration chamber to apply high heat by a heating unit, and a stirring fan, and the regeneration gas is transferred to the reaction chamber. A catalyst / adsorption powder circulating harmful gas removal method using a noxious gas removal filter device in which a supplying storage chamber is vertically connected and controlled to be opened and closed by a valve, wherein the catalyst / adsorption powder is collected by attaching it to the surface of the filter. Catalyst / adsorption powder attachment step; The pollutant gas containing harmful gas component is introduced into the reaction chamber through the pollutant gas inlet pipe, and the pollutant gas passes through the catalyst / adsorption powder layer and the harmful gas component of the pollutant gas is adsorbed and removed from the catalyst / adsorption powder to clean gas. Receiving harmful gas components; A backwashing step of backwashing the catalyst / adsorption powder in which the reaction has been performed with dedusting gas to separate from the filter; A regeneration step of transferring the catalyst / adsorption powder separated by the backwash to a regeneration chamber and applying high heat to separate and remove harmful gas components adsorbed on the catalyst / adsorption powder; The regenerated catalyst / adsorption powder is transferred to a storage chamber, and the stored catalyst / adsorption powder is sprayed with stirring and transporting gas to impart fluidity, and the catalyst / adsorption powder having fluidity is supplied to the catalyst / adsorption powder layer forming step. And a circulation step for recollecting the filter surface.

As described in detail above, the catalyst / adsorption powder circulating harmful gas removal method of the present invention is

The reaction chamber, the regeneration chamber, and the storage chamber are systemized to adsorb or convert the harmful gas components contained in the polluted gas into the catalyst / adsorption powder material, and the harmful gas components adsorbed by applying high temperature heat to the catalyst / adsorption powder. Regeneration by separating the process, and the regenerated catalyst / adsorption powder is recycled by removing the harmful gas components contained in the polluted gas to be reused, such as to enable continuous use without replacement of the catalyst / adsorption powder It is a useful method of removing harmful gases that can reduce costs.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

First, the filter device 10 used in the harmful gas removing method of the present invention, as shown in Figure 1, the reaction chamber 20, the regeneration chamber 30 and the storage chamber 40 is installed vertically catalyst It is made of a structure in which the adsorption powder is lowered by its own weight and supplied to the chamber located at the lower portion.

The reaction chamber 20 has a partition wall 21 formed therein horizontally to partition the inner space up and down. The polluted gas inlet pipe 22 communicates with the partitioned lower space so that the polluted gas or catalyst / adsorption powder containing harmful gas components is introduced from the outside. Here, the catalyst / adsorption powder includes a catalyst for converting harmful gas components into a safe gas and an adsorption powder for adsorbing harmful components, which may be used alone or in combination. In addition, in order to promote the adsorption or catalysis, the reaction heating part 26 may be installed on the side wall of the reaction chamber to increase the internal temperature.

Next, a plurality of rod filters 24 are mounted on the partition wall 21. The rod filter 24 attaches the catalyst / adsorption powder to a surface to form a catalyst / adsorption powder layer. Therefore, the polluted gas flowing into the reaction chamber lower space passes through the rod filter and comes into contact with the catalyst / adsorbed powder to adsorb and remove the harmful gas contained in the polluted gas, and the filtered clean gas is a clean gas discharge pipe of the upper space. 23) to be discharged, it is preferable to form a rod to increase the contact area with the polluting gas.

The reaction chamber 20 of the above configuration further includes a backwash nozzle 25 to prevent a deterioration of the filtering effect due to the saturation of the catalyst / adsorbed powder during operation, and the inside of the rod filter 24 by the discharge of the high pressure gas. Backwashing from outside to separate saturated adsorbed catalyst / adsorbent powder on the outer surface. At this time, by installing a pollutant gas sensor in the upper space partitioned by the partition wall to determine the degree of backwashing by measuring the filtering degree of the catalyst / adsorption powder.

The regeneration chamber 30 is positioned below the reaction chamber. The reaction chamber 20 and the regeneration chamber 30 are communicated with each other by the first connecting pipe 60, and the first connecting pipe is equipped with a valve 61 therein, so as to open the valve if necessary, the upper part of the reaction chamber 20 and the regeneration chamber 30 are connected to each other. The catalyst / adsorption powder of the reaction chamber is supplied to the lower regeneration chamber by its own weight.

The regeneration chamber 30 receiving the catalyst / adsorption powder through the first connection pipe 60 generates high heat by the heating unit 31 installed on the side so that noxious gas components adsorbed on the catalyst / adsorption powder are separated. do. In addition, the regeneration chamber 30 is provided with a communication gas inlet pipe 32 is installed on one side, and the concentrated gas discharge pipe 33 is installed in communication with the portion facing the conveying gas inlet pipe 33 harmful gas separated from the catalyst powder To discharge at high concentrations. The catalyst powder regenerated in the regeneration chamber is supplied to the lower storage chamber by opening the valve 71 of the second connecting pipe 70.

In the storage chamber 40, a stirring fan 41 driven by a motor is installed on a bottom surface thereof, and a plurality of transfer gas injection nozzles 42 for injecting a transfer gas in a downward direction of an inner center are formed on a side surface thereof. The stirring fan is to impart fluidity by stirring the introduced catalyst powder, and the injection gas injection nozzle further increases the catalyst powder fluidity by spraying the transport gas at a high speed so that the catalyst is stored through the circulation pipe 50 installed at one side. The adsorbed powder is supplied to the reaction chamber through the contaminated gas inlet pipe 22 to be attached to the surface of the rod filter to remove harmful gas components contained in the contaminated gas.

The catalyst / adsorption powder circulating toxic gas removal method using the noxious gas removal filter device 10 configured as described above has a catalyst / adsorption powder attaching step (S1) and a noxious gas component removing step (refer to FIGS. 2 and 3). S2), backwashing step S3, regeneration step S4, and circulation step S5.

The catalyst / adsorption powder attaching step (S1) is a step in which the catalyst / adsorption powder is collected and attached to the surface of the filter by supplying the catalyst / adsorption powder to the reaction chamber. The catalyst / adsorption powder is preferably formed to at least the thickness of the layer is formed so that the pollutant gas flowing into the post-process flows through the layer formed by the catalyst / adsorption powder. That is, the thickness of the catalyst / adsorption powder adhering to the filter is formed in the range of 1 to 3 mm, if the thickness is less than the set range, the contact ratio between the catalyst / adsorption powder and the noxious gas component is reduced, the adsorption removal rate is lowered, In the case of more than the above range, it is preferable that the suction force due to excessive thickness is lowered and thus the harmful gas component removal efficiency is lowered, thereby forming within the above range.

Next, when the catalyst / adsorption powder is attached, the harmful gas component removal step (S2) is performed. In this step, the pollutant gas containing noxious gas components is introduced into the reaction chamber and the filter / adsorption powder is passed through a filter attached to the catalyst / adsorption powder so that the noxious gas components are adsorbed or harmless to the gas components. Receive clean gas without harmful gas components. Thus, in order to promote the adsorption reaction of the catalyst / adsorption powder and the noxious gas component, the temperature of the reaction chamber may be set to 100 to 350 ° C. by the reaction heating unit. When heat is applied below the above range, reaction promotion is insufficient, and when heat is applied above the above range, the adsorbed harmful gas components may be separated, and therefore, heat is preferably added within the above range.

Adsorption removal of the noxious gas component in the noxious gas component removal step is performed by separating the catalyst / adsorbent powder from the filter to regenerate the catalyst / adsorbent powder as the adsorption of the catalyst / adsorbent powder is saturated and the filtering efficiency is deteriorated after a certain time. Step S3 is made. In the backwashing step, the gas is injected at high pressure in the backwash nozzle, so that the catalyst / adsorbed powder adsorbed on the filter is separated by the injection pressure and collected on the bottom surface of the reaction chamber.

Of course, in the step, the concentration measurement step (S6) of determining the presence of backwashing by measuring the saturation degree of the catalyst / adsorption powder is performed in advance. That is, when the gas passing through the filter is equipped with a pollutant gas measurement sensor to be above the set concentration to block the inflow of polluted gas and backwashed with a high-pressure gas to separate the catalyst / adsorption powder attached to the filter.

The catalyst / adsorption powder separated in the backwashing step is supplied to the regeneration chamber by opening the valve of the first connecting pipe. In the regeneration chamber supplied with the catalyst / adsorption powder, the regeneration step (S4) of separating the harmful gas components adsorbed on the catalyst / adsorption powder by heating the supplied catalyst / adsorption powder after closing the valve of the first connection pipe is performed. do. The heating temperature applied to the catalyst / adsorption powder in the regeneration step is added in the range of 350 ~ 550 ℃. If it is less than the above range, the separation of harmful gas components from the catalyst / adsorption powder is not made, and if it is above the above range, it is preferable to heat within the above range because the enhancement of the harmful gas separation is insufficient.

When heated to the high temperature, the harmful gas component adsorbed on the catalyst / adsorption powder is separated from the catalyst / adsorption powder and discharged to the concentrated gas discharge pipe together with the transport gas blown from the transport gas inlet pipe on one side.

Next, the catalyst / adsorption powder, which has undergone the regeneration step, is provided with fluidity by the transfer gas, and is supplied to the reaction chamber through the contaminated gas inlet pipe to be reattached to the filter (S5). The catalyst / adsorption powder regenerated in the regeneration step is supplied to the storage chamber by opening the valve of the second connection pipe, and the valve of the second connection pipe is shut off when the supply of the catalyst / adsorption powder is completed.

The storage chamber is composed of a stirring fan installed in the inner lower portion of the storage chamber as a means for imparting fluidity to the stored catalyst / adsorption powder, and a transfer gas injection nozzle for injecting the transfer gas from the side surface. That is, the catalyst powder stored by the injection pressure injected from the transfer gas injection nozzle is supplied to the reaction chamber through a circulation pipe connected to the side surface where fluidity is generated. The catalyst / adsorption powder supplied to the reaction chamber is attached to the filter to adsorb and remove harmful gas components from the polluted gas.

At this time, the transfer gas injection nozzle is sprayed only on one side of the storage chamber, so that the stored catalyst powder layer is buckled and fluidity is not smoothly applied. Therefore, the catalyst powder is moved horizontally by stirring the stirring fan to evenly move the moving gas injection pressure. Can be delivered.

Briefly describing the removal method, the pollutant gas is introduced while the catalyst / adsorption powder is attached to the filter to adsorb and remove harmful gas components contained in the pollutant gas by contact of the catalyst / adsorption powder with the pollutant gas.

When the catalyst / adsorption powder becomes saturated by the above reaction, the catalyst / adsorption powder attached to the filter is separated by blocking the inflow of polluted gas and backwashing at a high pressure.

The separated catalyst / adsorption powder is supplied to the regeneration chamber to apply high heat to remove the adsorbed noxious gas components so as to be regenerated, and the regenerated catalyst / adsorption powder is supplied to the storage chamber to impart fluidity to the reaction chamber. To be attached to the filter.

Here, each process is performed by circulation and is blocked by a valve between the chambers, so that the catalyst / adsorbed powder already regenerated in the reaction chamber is regenerated to the filter during the regeneration of the separated catalyst / adsorbed powder in the reaction chamber. The sequential reaction steps may be performed in each chamber, such as the filtering and the filtering according to the inflow of polluted gas.

In addition, the above-mentioned example is only an example to demonstrate this invention. Therefore, it is obvious that the ordinary skilled in the art to which the present invention pertains uses the partial change with reference to the detailed description.

1 is a schematic view of a filter device used in the present invention.

2 and 3 are block diagrams of the removal method of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: catalytic circulation harmful gas removal filter device

20: reaction chamber

21: bulkhead 22: polluted gas inlet pipe

23: clean gas discharge pipe 24: rod filter

25: reverse nozzle 26: reaction heating unit

30: regeneration chamber

31: heating unit 32: transfer gas inlet pipe

33: concentrated gas discharge pipe

40: storage chamber

41: stirring fan 42: transfer gas injection nozzle

50: circulation tube

60: first connector

61,71: Valve

70: second connector

S1: catalyst / adsorption powder attachment step S2: harmful gas component removal step

S3: backwash step S4: regeneration step

S5: circulation step S6: concentration measurement step

Claims (2)

The reaction chamber is provided with a reaction chamber including a reaction chamber in which upper and lower portions of the upper and lower parts are partitioned by a plurality of rod filters, and a reverse nozzle is installed, a regeneration chamber to apply high heat by a heating unit, and a stirring fan, and the regeneration gas is transferred to the reaction chamber. In the catalyst / adsorption powder circulating harmful gas removal method using a noxious gas removal filter device in which the supplying storage chamber is vertically communicated and the opening and closing is controlled by a valve, A catalyst / adsorption powder attaching step (S1) for collecting the catalyst / adsorption powder on the surface of the filter and attaching it; The pollutant gas containing harmful gas component is introduced into the reaction chamber through the pollutant gas inlet pipe, and the pollutant gas passes through the catalyst / adsorption powder layer and the harmful gas component of the pollutant gas is adsorbed and removed from the catalyst / adsorption powder to clean gas. Receiving harmful gas component step (S2) and; A backwashing step (S3) of backwashing the catalyst / adsorption powder in which the reaction has been carried out with a dedusting gas to separate from the filter; A regeneration step (S4) of transferring the catalyst / adsorption powder separated by the backwash to a regeneration chamber and separating and removing harmful gas components adsorbed on the catalyst / adsorption powder by applying high heat; The regenerated catalyst / adsorption powder is transferred to a storage chamber, and the stored catalyst / adsorption powder is sprayed with stirring and transporting gas to impart fluidity, and the catalyst / adsorption powder having fluidity is supplied to the catalyst / adsorption powder layer forming step. Recirculation step (S5) to be re-collected on the filter surface; Catalyst / adsorption powder circulating harmful gas removal method comprising the. The method of claim 1, The backwashing step (S3) is characterized in that the concentration measurement step (S6) to measure the harmful gas concentration in the filtered gas to block the influx of contaminated gas into the reaction chamber and backwashing the filter if the set value is higher than the set value. Catalyst / adsorption powder circulating harmful gas removal method.

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