JP2616516B2 - Harmful component heating purification device and purification method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxidative purification by heating odorous components such as CO (carbon monoxide) and HC (hydrocarbon) and harmful components, bacteria, ticks and the like mixed in various exhaust gases to an appropriate temperature. The present invention relates to a heat purifying device that is extinct.

[0002]

In recent years, various combustor and drying, CO and HC components generated during the heat treatment is adapted to what is essential to discharge to purify because of its hazardous properties and odor.
A harmful gas is generated at the time of fusing a band machine, resin, vinyl, or the like, and purification thereof is required. In the living environment, it is also necessary to purify tobacco smoke, bacteria, mites and the like. As a method of purifying CO and HC components and killing bacteria and mites, a method of heating a gas containing a harmful component 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.
In the method using an oxidation catalyst, the reaction can proceed in a temperature range of 200 to 400 ° C., and waste of heat energy can be reduced.

Hereinafter, a conventional apparatus for purifying harmful components by heating will be described. 3A and 3B show an example of a conventional catalyst heating and purifying apparatus. FIG. 3A shows a catalyst purifying apparatus main body, and FIG. 3B shows a system including heat exchange. In the figure, 25 is a catalyst purifying apparatus main body, 27 a heat exchanger, 22 is a heating apparatus, 23 denotes the catalyst. In (a), the gas containing harmful components is introduced into the main body of the catalyst heating device from the inlet of 20, the temperature is raised to a predetermined temperature by the heating device of 22, CO, HC, etc. are oxidized and purified by the catalyst of 23, and 24 Is discharged from the exit. At this time, the energy required to raise the temperature of the gas is discharged together with the gas. System using a heat exchanger <br/> the purpose of recovering some of this energy is (b). In this case introduced from 26 gas that is heated by the heat exchanger 27 flows along the arrows, the flow proceeds to 25 catalytic purifier body. Here heated purified gas is cooled again enters 27 the heat exchanger 2
Discharge from 8. In other words, part of the energy required to raise the temperature of the gas is recovered to reduce energy loss
Things .

[0004] On the other hand, FIG. 4 shows an example of a heating and purifying apparatus using a heat accumulator, in which heat energy is reduced by alternately repeating the states (a) and (b). . 6 is a heat storage body, 10 is a heating device. 29,3
0 indicates a damper for controlling the flow of gas containing harmful components. In (a), the gas advances from the inlet 1 as shown by the arrow 3 and passes through the lower heat storage from the inlet 27. And one
Heated and purified by the heating device 0, cooled by the upper heat storage body, and then proceeded from the outlet 28 to the outlet 11. Next, the damper 2 is moved so that the gas flows as shown in FIG.
Operate 9, 30 respectively. In other words, the upper heat storage element that has taken heat from the gas purified by heating in (a) works to give heat to the gas, and works to supplement part or most of the energy for heating the gas. That is, 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]

[SUMMARY OF THE INVENTION However the heat exchanger used in the configuration of the conventional example 1 shown in (Fig. 3) 27
Is usually mainly made of thin aluminum having good conductivity, and the heat exchange efficiency is limited to 50 to 60%. Also S
Exhaust gas containing corrosive gas such as Ox and NOx could not be used because aluminum corroded. In the conventional example 2 shown in FIG. 4, the disadvantage of the conventional example 1 can be solved by using the corrosion-resistant heat storage body, but the structure of the heat storage body, the heat radiation from the side wall of the heating device, the damper, and the like are complicated. There was a drawback to do. Further, when the flow of gas is switched inside the purifier, the gas accumulated in the gas inlet / outlet and the heat storage layer on the windward side is discharged without being purified.

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

[0007]

In order to achieve the above object, a harmful component purifying apparatus of the present invention has a structure in which one end of a main body is open and the other end is closed, and the two parts communicate with each other at a closed portion. The two chambers are arranged symmetrically via a dividing wall , the heat storage layer is arranged on the opening side of each chamber, and the heating device and the catalyst are arranged on the closed side. Openings are arranged on the same plane, and each chamber has a configuration that can communicate with any one of a gas inflow channel and an outflow channel and the outside atmosphere via a slide damper controlled by one drive system. .

[0008]

The operation of this embodiment for purifying gas containing harmful components will be described. The two chambers of the purifier main body are operated in a state of being communicated with only one of a gas outflow channel, an inflow channel and an outside air atmosphere at openings arranged on the same plane.
First, as one pattern, gas containing harmful components flows into one chamber from the inflow channel, is heated and purified by the heat storage unit, the heating device, and the catalyst, is cooled by the heat storage layer in the other room, and is discharged to the gas outflow channel. Is done. At this time, the heat storage layer used on the gas cooling side deprives the gas of heat and stores heat.

The second pattern operates with one drive system.
The opening of the chamber that has been in communication with the gas inflow passage by the slide damper is switched to communicate with the outside air atmosphere.
On the side that is in communication with the outflow channel, the outside air is introduced instead of gas by maintaining the state of communication with the outflow channel, and flows through the inside of the purification device body in the same direction as before, and the heat storage element, heating device, and catalyst are removed. After that, it is cooled by the heat storage layer of the other chamber and discharged to the gas outflow passage. That is, unpurified harmful components near the gas inlet and in the heat storage layer are heated by the outside air,
Purified by catalyst.

In the third pattern, the slide damper is similarly operated to switch the gas flow in the purifier body so that the gas flow in each chamber is reversed from the first pattern. The gas containing the harmful component enters the inside of the purification device main body from the room opposite to the first pattern, and passes through the heat storage layer in that room. Since the heat storage layer stores heat in the case of the first pattern, the heat storage layer functions to apply heat to the gas in this pattern. The gas is further heated and purified by the heating device. Then, it is cooled and discharged by the heat storage layer in the other chamber.

In the last pattern (4), similarly to the pattern (2), the opening of the chamber which has been in communication with the gas inflow passage by the slide damper is switched so as to communicate with the outside air atmosphere, and the outside air is introduced from this chamber. , Heat storage layer, heating device,
After passing through the catalyst, it is cooled by the heat storage layer in the other chamber, and is discharged into the gas outflow passage, so that unpurified harmful components near the gas inlet and in the heat storage layer are driven by external air to the heating device and the catalyst. Purify.

Repetition of the above four patterns at regular time intervals is achieved by operating one slide damper to heat and purify heat energy required to heat a gas containing harmful components to a temperature required for purification. Since it can be trapped inside the device body, no unpurified harmful components are discharged when the gas flow is switched, and heat is only released from the outermost wall, heat is only released from the heat storage unit and the heating device. It can be seen that the harmful component purifying device has high efficiency and purification efficiency.

[0013]

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

In FIG. 1A, reference numeral 1 denotes an inlet of a gas containing a harmful component, 2 denotes an inflow passage thereof, and 11 denotes an outlet of a gas. 7 is a catalyst purification device main body, 6 is a heat storage layer, 10
Denotes a heating device, and 9 denotes a catalyst. (B) is AB of (a)
FIG. The openings of the two chambers on the left and right are on the same plane 31 and can be controlled by one drive system, and are connected to the inflow channel, the outflow channel or the outside atmosphere by slide dampers composed of 12 slide sections and 13 main body section ( (Indicated by 5, 4, 33, respectively)). FIG. 1 (b) shows one end in which the lower part of the device is closed, and two right and left sides divided by eight dividing walls.
The rooms communicate here. The flow of the exhaust gas is indicated by arrow 3. Reference numeral 34 denotes an open opening. The states shown in FIGS. 1A and 1B will be described. The gas containing the harmful component enters from 1 in (a), proceeds to the left, passes through the opening at 34 from the arrow, and is introduced into the heating and purification apparatus main body. Then, the gas flows as indicated by the arrow in FIG. 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 flow path 1
It is discharged to 1. (C) and (d) are cross-sectional views taken along line AB in (c), showing 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). showed that. By this operation, a state where there is no unpurified harmful component in the left chamber can be created.

Next, the slide damper is operated so as to be in the state of (e) and (f), and gas is flowed again.

At this time, the gas flows to the right in the inflow channel at (e), flows from the top to the bottom at the right chamber in (f), and moves to the left chamber.
It flows upward from below and is discharged to the outflow channel. The heat storage layer in the right chamber sufficiently stores heat energy in the states (b) and (d), and functions to heat the gas by heat exchange in the state (f). (G) and (h) show a state in which outside air is introduced into the right chamber by operating the slide damper after a certain period of time from the states of (e) and (f).
As in (c) and (d), this operation can create a state in which there is no unpurified harmful component in the right chamber.
By repeating the above four patterns, the heat energy is confined in the heating and purifying device by operating one slide damper, and the loss amount is very small.
It also means that harmful components are not discharged without purification. FIG. 2 shows the slide damper of this embodiment. (A) is the slide part 1 of the slide damper
2 and (b) shows the main body 13 of the slide damper. 14 is an opening of the slide portion, 16 is a gas inflow channel,
Reference numeral 17 denotes an outside air atmosphere, and reference numeral 18 denotes a gas outflow passage. The state shown in FIG. 2C corresponds to the state shown in FIGS. The opening of the left chamber of the purifier main body communicates with the gas inflow channel, and the right chamber communicates with the gas outflow channel. (D), (e), and (f) in FIG. 2 correspond to the states of (c), (d), (e), (f), (g), and (h) in FIG. 1, respectively. That is, by operating the slide portion of the slide damper with one drive system, the gas flow can be reversed inside the purification device main body, and a pattern for introducing outside air can be incorporated to discharge unpurified gas. There is no.

Table 1 shows the results of measuring the effect of purifying harmful components and the thermal efficiency in this example.

[0018]

[Table 1]

The heating and purifying apparatus uses 5 liters of granular alumina (5 to 10 mmφ) as a heat storage body in each chamber, a catalyst of 1 liter of a platinum catalyst in a honeycomb form, and a heating apparatus using a Shizu heater of 1 kw max.
The temperature was adjusted at 0 ° C. The gas contained 100 ppm of styrene gas, and the blowing rate was 500 liter / min. The gas purification rate is indicated by the decomposition rate of styrene gas by the catalyst, and the thermal efficiency is calculated by simply comparing the difference between the outlet temperature and the inlet temperature with respect to the temperature rise to 600 ° C assuming that the exhaust gas is heated to 600 ° C. Was calculated. 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, alumina is used as a heat storage material and has excellent corrosion resistance. Therefore, even if a component (for example, acid gas or the like) that corrodes metal is contained in exhaust gas, it can be used sufficiently. Endure.

[0022]

As is evident from the foregoing description, the present invention is divided into two chambers that purification apparatus body having a heat storage layer, by a slide damper having one end which opening can be controlled by a single drive system on the same plane, the flow of gas It has a structure that can communicate with the flow path, the outflow flow path, or the outside air atmosphere, respectively, and has a heating device and a catalyst that communicate with each other at the closed other end portion. The heated gas is supplied with heat energy from the heat storage layer, and after purifying harmful components with a heating device and a catalyst, heat is exchanged in the heat storage layer of the other chamber and cooled, and the gas flows out of the opening. Is discharged. By moving the slide of the slide damper after a certain period of time, the flow direction of the gas can be reversed through the process of introducing outside air, so that the heat storage layers in the respective chambers perform the reverse heat exchange action. By repeating this operation alternately, it is possible to realize a harmful component heating and purifying apparatus capable of minimizing the loss of heat energy and efficiently purifying harmful components in exhaust gas without short-passing.

[Brief description of the drawings]

FIG. 1 (a) is a diagram showing the entire configuration of a harmful component heating / purifying apparatus according to a first embodiment of the present invention. FIG. 1 (b) is a cross-sectional view taken along line AB in FIG. 1 (a). , (G) show the state of changing the gas flow of (a) by operating the slide damper. (D), (f), (h) show (c), (e),
Sectional view along line AB in (g).

2 (a) illustrates a main portion of FIG. (B) a slide damper showing a sliding portion of the slide <br/> damper disposed on the same surface of the present invention (c), (d), (e (F) shows the state of the opening due to the overlap between the slide damper and the main body.

FIG. 3 (a) is a diagram showing a configuration of a conventional catalyst purification device main body. (B) is a diagram showing a configuration of an entire conventional catalyst purification system including a heat exchanger.

FIG. 4A is a diagram showing a configuration of a conventional thermal storage purifying device main body. FIG. 4B is a diagram showing a state in which the flow of exhaust gas is reversed.

[Explanation of symbols]

Reference Signs List 6 heat storage layer 9 catalyst 10 heating device 12 slide portion of slide damper 13 body portion of slide damper 31 opening portion arranged on the same surface

Claims (2)

(57) [Claims] 1. A one has a body which is divided into two chambers communicating with each other at the portion with the closed open other end, the symmetrical position via a dividing wall which divides the two chambers, each chamber The heat storage layer is arranged on the side of the opening, the heating device and the catalyst are arranged on the closed side, and the respective chambers are arranged with the opening on the same plane, and the position corresponding to the opening
With a slide section opening that can be controlled by one drive system .
The ride damper communicates with the inflow passage of gas containing harmful components, the outflow passage of purified gas or the outside atmosphere
A harmful component heating and purifying device. 2. The harmful component heating and purifying apparatus according to claim 1.
Cleaning method that repeats the cleaning operation alternately in the following pattern
Law. One pattern: A gas containing harmful components flows into one chamber from an inflow channel, is heated and purified by a heat storage unit, a heating device, and a catalyst, is cooled by a heat storage layer in the other room, and is discharged to a gas outflow channel. You. Two patterns: The opening of the chamber that has been in communication with the gas inflow passage is switched to be in communication with the outside air atmosphere by the slide damper that operates with one drive system, and the outside air is introduced into this chamber. After passing through the heat storage layer, the heating device, and the catalyst, it is cooled by the heat storage layer in one chamber and discharged to the gas outflow passage. The three patterns are switched by the slide damper so that the gas flow in the purifier main body is reversed in the respective chambers in the respective chambers, and the harmful components are discharged through heating, purification and cooling processes. Four patterns: The opening of the chamber, which had been in communication with the gas inflow passage by the slide damper, was switched so as to communicate with the outside air atmosphere. The outside air was introduced into this chamber, and the other passed through the heat storage layer, the heating device, and the catalyst. Is cooled by the heat storage layer in the chamber and discharged to the gas outflow passage.