JPH054026A - Harmful component heating and cleaning device - Google Patents

Abstract

PURPOSE:To provide the cleaning device which is small in energy loss and is simple in construction as the cleaning device which heats, oxidizes and cleans the harmful components, such as CO (carbon monoxide), HC (hydrocarbon), bacteria, ticks, etc., in various kids of gases. CONSTITUTION:The apertures of the two chambers of the cleaning device body consisting of the two chambers which are communicated with each other at the closed other ends and have heaters and catalysts exist on the same plane and allow the inflow and outflow of gases or the communication with the outdoor air by means of dampers which can be controlled by one driving system. Heat accumulating body layers which are respectively resistant to corrosion are installed to the mid-ways of the gas flow passages from the opening ends to the heaters. The gases are applied with heat from the one heat accumulating body layer and are thereby heated and cleaned. The gases are deprived of the heat by another heat accumulating body layer and are thereby cooled and discharged. The flow of the gases is reversed through the process introducing the outdoor air by driving the dampers at every specified time, by which the respective heat accumulating body layers are subjected to an exchange of the heating or cooling. The heat energy necessary for heating of the gases is confined into the cleaning device in this way and the short passing of the uncleaned harmful components is obviated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is directed to oxidative purification by heating malodorous or harmful components such as CO (carbon monoxide) and HC (hydrocarbons) mixed in various exhaust gases, bacteria, mites, etc. to an appropriate temperature. The present invention relates to a heat purifying device that is dead.

[0002]

2. Description of the Related Art In recent years, it has become indispensable to purify and discharge CO and HC components generated in various combustors, drying and heat treatment due to their harmfulness and odor.
Hazardous gas is generated during fusion of band machines, resins, vinyl, etc., and its purification is required. Also, in the living environment, it is necessary to purify tobacco smoke, bacteria, mites and the like. As a method of purifying CO and HC components and killing bacteria, mites and the like, a method of heating a gas containing a harmful component itself and reacting it with oxygen in the gas has the highest purification efficiency and high reliability. In order to raise the temperature of the gas and allow oxygen in the air to react with CO and HC, a temperature of 800 to 900 ° C. or higher is required.
With the method using an oxidation catalyst, the reaction can proceed in the temperature range of 200 to 400 ° C. and waste of thermal energy can be eliminated.

A conventional heating harmful substance purification apparatus will be described below. FIG. 3 shows an example of a conventional catalyst heating and purifying apparatus, (a) shows the main body of the catalytic purifying apparatus, and (b) shows a system including heat exchange. In the figure, 25 is a catalyst purifying device main body, 27 is a heat exchanger, 22 is a heating device, and 23 is a catalyst. In (a), the gas containing harmful components is introduced into the main body of the catalyst heating device through the inlet of 20, heated to a predetermined temperature by the heating device of 22, and CO, HC, etc. are oxidized and purified by the catalyst of 23, and 24 Is discharged from the exit of. At this time, the energy required to raise the temperature of the gas is discharged together with the gas. A system using a heat exchanger for the purpose of recovering a part of this energy is (b). In this case, the gas introduced from 26 and heated by the heat exchanger of 27 flows along the arrow and proceeds to the main body of the catalyst purifying device of 25. The gas that has been heated and purified here enters the heat exchanger 27 again and is cooled.
Discharge from 8. That is, it is an object to reduce energy loss by recovering a part of the energy required for heating the gas.

On the other hand, FIG. 4 shows an example of a heat purifying apparatus using a heat storage body, in which the state of (a) and the state of (b) are alternately repeated to reduce heat energy. . 6 is a heat storage body, and 10 is a heating device. 29,3
0 indicates a damper that controls the flow of gas containing harmful components. In (a), the gas advances from the inlet 1 as shown by the arrow 3 and passes from the inlet 27 to the lower heat storage body. And 1
It is heated and purified by the heating device No. 0, cooled by the upper heat storage body, and proceeds from the outlet 28 to the outlet 11. Next, after a certain period of time, the damper 2 is adjusted so that the gas flows as shown in (b).
Operate 9, 30 respectively. That is, the upper heat storage body, which has removed heat from the gas that has been heated and purified in (a), now works to give heat to the gas, and works to supplement a part or most of the energy for heating the gas. That is, the heat is reciprocated in the purifying device to save energy. When a catalyst is used, it can be placed between the upper and lower heat storage layers.

[0005]

However, the heat exchanger 27 used in the configuration of the conventional example 1 shown in the above (FIG. 3).
Is usually mainly composed of thin aluminum with good conductivity, and the heat exchange efficiency is limited to 50 to 60%. Also S
Aluminum cannot be used for exhaust gas containing corrosive gases such as Ox and NOx because aluminum corrodes. The conventional example 2 shown in FIG. 4 can solve the drawbacks of the conventional example 1 by using a corrosion-resistant heat storage material, but the heat radiation from the heat storage material and the side wall of the heating device, the configuration of the damper, etc. may be complicated. There was a drawback to Further, when the gas flow is switched inside the purifier, the gas accumulated in the inlet / outlet of the gas and the heat storage layer on the windward side is discharged without being purified.

The present invention solves the problem of the above-mentioned conventional example 2, in which the loss due to heat dissipation is minimized and the structure of the damper is simplified so that no harmful components are discharged without being purified. It is intended to provide a harmful component purification device.

[0007]

In order to achieve the above object, the harmful component purifying apparatus of the present invention has a structure in which one end of the main body is open and the other end is closed, and the closed parts communicate with each other. The chamber has a chamber, the heat storage layer is arranged on the opening side of each chamber, the heating device and the catalyst are arranged on the closed side, and the openings of the chambers are arranged on the same plane to form one drive. Each chamber is configured to be able to communicate with any of the gas inflow passage and the outflow passage and the outside air atmosphere via a damper controlled by the system.

[0008]

The function of purifying the gas containing the harmful component by this structure will be described. The two chambers of the main body of the purifying device operate at the openings arranged on the same plane, respectively in communication with only one of the gas outflow passage, the inflow passage or the outside air atmosphere.
First, as a first pattern, a gas containing harmful components flows into one chamber from an inflow passage, is heated and purified by a heat storage body, a heating device, and a catalyst, is cooled by a heat storage layer in the other chamber, and is discharged to a gas outflow passage. To be done. At this time, the heat storage layer used on the cooling side of the gas takes heat from the gas and stores the heat.

The pattern 2 is switched so that the opening of the chamber, which has been communicated with the gas inflow passage, is communicated with the outside air atmosphere by the damper operated by one drive system. On the side that communicates with the outflow passage, by maintaining the state where it communicates as it is, outside air is introduced instead of gas and flows in the same direction as before in the main body of the purification device, and the heat storage body, heating device, and catalyst are After that, it is cooled by the heat storage layer in the other chamber and discharged to the gas outflow passage. That is, unpurified harmful components in the vicinity of the gas inlet and in the heat storage layer are expelled by the outside air to the heating device and the catalyst for purification.

Similarly, the pattern of 3 is switched by operating the damper so that the flow of gas in the main body of the purifying device is reversed to the pattern of 1 in each chamber. The gas containing the harmful component enters the inside of the purifying apparatus main body from the chamber opposite to the pattern of 1, and passes through the heat storage layer in the chamber. Since this heat storage layer stores heat in the pattern 1, it works to give heat to the gas in this pattern. The gas is further heated and purified by the heating device. Then, it is cooled by the heat storage layer in the other chamber and discharged.

In the last 4 patterns, as in the case of the 2 pattern, the damper is switched so that the opening of the chamber communicating with the gas inflow passage communicates with the outside air atmosphere, and the outside air is introduced from this chamber. After passing through the heat storage layer, heating device, and catalyst, it is cooled by the heat storage layer in the other chamber and discharged to the gas outflow passage, so that unpurified harmful components near the gas inlet and in the heat storage layer are released to the outside air. Purifies by pursuing the heating device and catalyst.

By repeating the above four patterns at regular intervals, the heating and purifying device for heating the heat energy for heating the gas containing harmful components to the temperature required for purification by operating one damper. It can be confined inside the main body, no unpurified harmful components are emitted when switching the gas flow, and heat radiation from the heat storage body and heating device is only from the outermost wall, so energy efficiency And it is understood that it is a harmful component purification device with high purification efficiency.

[0013]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1 (a), reference numeral 1 is an inlet for gas containing a harmful component, 2 is an inflow passage thereof, and 11 is an outlet for gas. 7 is a catalyst purifying apparatus main body, 6 is a heat storage layer, 10
Is a heating device, and 9 is a catalyst. (B) is AB of (a)
A sectional view of the line is shown. The openings of the two chambers on the left and right are on the same plane of 31 and are connected to the inflow passage, the outflow passage or the outside air atmosphere by a damper consisting of 12 slide portions and 13 main body portions that can be controlled by one drive system (each 5,4,33
). FIG. 1B shows one end where the lower part of the device is closed, and two left and right chambers divided by eight dividing walls communicate with each other. The flow of exhaust gas is shown by arrow 3. Reference numeral 34 indicates an open opening. The states of FIGS. 1A and 1B will be described. The gas containing a harmful component enters from 1 of (a), proceeds to the left, passes through the opening of 34 from the arrow, and is introduced into the main body of the heat purifying apparatus. Then, the gas flows as shown by the arrow in (b). At this time, the gas is heated by the heat storage layer 6 in the left chamber, passes through the catalyst, is further heated to a required temperature by the lower heating device 10, and is purified by the catalyst in the right chamber. Then, heat is exchanged in the heat storage layer 6 in the right chamber, and the heat is discharged from the opening 34 to the outflow passage 11 in a cooled state.
(C) And sectional drawing along the AB line of (c) (d).
Shows a state in which outside air is introduced into the left chamber by operating the slide damper after a certain period of time from the states of (a) and (b). By this operation, it is possible to create a state where there is no unpurified harmful component in the left chamber.

Next, the damper is operated (e) and (f).
Then, let gas flow again.

At this time, the gas flows to the right in the inflow passage in (e), flows from the top to the bottom in the right chamber in (f), and moves to the left chamber,
It flows from bottom to top and is discharged to the outflow passage. The heat storage layer in the right chamber stores sufficient heat energy in the states (b) and (d), and in the state (f), it functions to heat the gas by heat exchange. (G) and (h) show the state where the outside air is introduced into the right chamber by the operation of the slide damper after a certain period of time from the states of (e) and (f).
Similar to (c) and (d), this operation can create a state where there is no unpurified harmful component in the right chamber.
By repeating the above four patterns, the thermal energy is confined in the heating and purifying device by operating one slide damper, and the amount lost is very small.
It also means that harmful components are not discharged unpurified. FIG. 2 shows the damper of this embodiment. (A) shows the slide part 12 of the damper,
(B) shows the main body 13 of the damper. 14 is an opening of the slide portion, 16 is a gas inflow passage, 17 is an outside air atmosphere,
18 communicates with the gas outflow passage. The state of (c) of FIG. 2 corresponds to the states of (a) and (b) of FIG. The opening of the left chamber of the purification device body communicates with the gas inflow passage, and the right chamber communicates with the gas outflow passage. 2 (d)
(E) and (f) are (c), (d), and (e) of FIG. 1, respectively.
This corresponds to the states of (f), (g) and (h). That is, by operating the slide part of the damper with one drive system, the flow of gas can be reversed inside the purifier main body, and a pattern for introducing the outside air can be incorporated to discharge unpurified gas. Absent.

The results of measuring the purification effect of harmful components and thermal efficiency in this example are shown in (Table 1).

[0018]

[Table 1]

The heating and purifying device uses 5 liters of granular alumina (5 to 10 mmφ) in each chamber as a heat storage body, 1 liter of honeycomb-shaped platinum catalyst for each catalyst, and a heating device of a max 1 kw Shihzu heater.
The temperature was adjusted at 0 ° C. The gas contained 100 ppm of styrene gas, and the air flow rate was 500 liters / min. The purification rate of gas is indicated by the decomposition rate of styrene gas with a catalyst,
The thermal efficiency was calculated by simply comparing the difference between the outlet temperature and the inlet temperature with respect to the temperature rising to 600 ° C., assuming that the exhaust gas was heated to 600 ° C. The outside air introduction time was 2 seconds.

As is clear from (Table 1), the heating and purifying apparatus according to the present embodiment can achieve purification of styrene gas exhaust gas of 90% or more with heat exchange efficiency of 80% or more.

Further, in this embodiment, since alumina is used as the heat storage material and the corrosion resistance is excellent, even if the exhaust gas contains a component that corrodes a metal (for example, acid gas, etc.), it can be sufficiently used. Endure.

[0022]

As described above, according to the present invention, the purifying apparatus main body is divided into two chambers having the heat storage layer, and the inflow flow of gas is controlled by the damper whose one open end can be controlled by one drive system on the same plane. The structure has a structure capable of communicating with the channel, the outflow channel, or the atmosphere of the outside air in a mutually opposite manner, and has a structure in which a heating device and a catalyst are provided so as to communicate with each other at the closed other end portion,
The gas introduced from the opening of one chamber is supplied with thermal energy from the heat storage layer, purified of harmful components by the heating device and the catalyst, and then heat-exchanged and cooled by the heat storage layer of the other chamber. And is discharged to the outflow passage from the opening. By moving the slide of the damper after a certain period of time, the flow direction of the gas can be reversed through the process of introducing the outside air, so that the heat storage layer in each chamber performs an opposite heat exchange action. By repeating this operation alternately, it is possible to realize a harmful component heating and purifying apparatus that can minimize the loss of thermal energy and efficiently purify the harmful components in the exhaust gas without short-passing.

[Brief description of drawings]

FIG. 1 (a) is a sectional view taken along the line AB of FIG. 1 (b) showing the overall configuration of a harmful component heating / purifying device according to the first embodiment of the present invention (c), (e). , (G) shows the state where the gas flow in (a) is changed by the operation of the damper, (d), (f), (h) are (c), (e), respectively.
Sectional drawing which followed the AB line of (g).

FIG. 2 (a) is a view showing a slide part of a damper arranged on the same surface of the present invention, (b) is a view showing a main body part of the damper, (c), (d), (e) and (f) are FIG. Diagram showing the state of the opening due to the overlap of the damper and the main body

FIG. 3 (a) is a diagram showing the configuration of a conventional catalyst purifying apparatus main body, and FIG. 3 (b) is a diagram showing the overall configuration of a conventional catalyst purifying system including a heat exchanger.

FIG. 4 (a) is a view showing a configuration of a conventional heat storage-type purification apparatus main body, and FIG. 4 (b) is a view showing a state in which a flow of exhaust gas is reversed.

[Explanation of symbols]

6 heat storage layer 9 catalyst 10 heating device 31 Openings arranged on the same plane 12 Damper slide 13 Damper body

Claims (2)

[Claims] 1. A main body divided into two chambers, one end of which is open and the other end of which is closed, and which communicates with each other at that portion,
The heat storage layer is arranged on the opening side of each chamber, the heating device and the catalyst are arranged on the closed side, and the opening parts of the chambers are arranged on the same plane, whereby one drive system is formed. A harmful component heating and purifying device characterized by being connected to an inflow passage, an outflow passage of a gas containing a harmful component or an outside air atmosphere through an operating damper. 2. The two chambers are operated in a state in which they communicate with only one of the gas outflow passages, the inflow passages, or the outside air atmosphere, and the cleaning operation is repeated alternately in the following pattern.
Heat treatment device for harmful components described. 1 pattern-Gas containing harmful components flows into the one chamber from the inflow passage, is heated and purified by the heat storage body, the heating device and the catalyst, is cooled by the heat storage layer in the other chamber and is discharged to the gas outflow passage. 2 patterns --- The damper operated by one drive system switches the opening of the chamber that was in communication with the gas inflow passage so that it communicates with the atmosphere of the outside air, and the outside air is introduced into this chamber and the heat storage layer, heating 3 patterns that are cooled by the heat storage layer in one chamber and discharged to the gas outflow passage through the device and the catalyst-By the damper, the gas flow in the purifying device main body is reversed to the one pattern in each chamber. Switching, the harmful components are discharged through the heating, purification and cooling processes. 4 patterns-The damper is switched so that the opening of the chamber that was in communication with the gas inflow passage is communicated with the outside air atmosphere. Guide Is, the heat storage layer, is discharged to the heating device, it is cooled by the heat storage layer of the other chamber through the catalytic gas outflow passages