JPS606013A - Catalyst converter associated with heat-exchanger - Google Patents

Abstract

PURPOSE:To prevent discharge of lamp soot at the initial stage of engine starting, by leading exhaust gas through an oil catcher provided in the center of pellet catalyst layer. CONSTITUTION:A baffled oil catcher 11 is provided in the center of a pellet catalyst layer 12. Oil in the exhaust gas at the initial stage of engine starting is stored in the oil catcher 11 to discharge oil-less exhaust gas through catalyst 12, reheating section 13, heat-exchanger 15 contained in the case 2 and exhaust gas outlet 16. Upon sufficient heating of catalyst through continuous running of engine, the oil catcher 11 is heated from the outside to gasify the oil which is purified together with the exhaust gas through catalyst 12 and reheating section 13 and discharged.

Description

DETAILED DESCRIPTION OF THE INVENTION A) Field of Industrial Application The present invention relates to a catalytic converter with a heat exchanger that completely purifies exhaust gas from an engine and recovers heat from the exhaust gas.

BACKGROUND ART Various types of catalytic converters for purifying exhaust gas from engines can be considered, such as those shown in FIGS. 1 to 4, for example.

First of all, in the model shown in Figure 1, the exhaust gas is 1 exhaust gas population.
The catalyst is introduced into the catalyst chamber 6 of the converter case 2 and fixed to the catalyst fixed layer 5 inside the catalyst case 40. The exhaust gas is discharged from the converter case 2 through the exhaust gas heat exchange section 8. Therefore, (a) the heat of the catalyst 6 and the fixed catalyst bed 5 is radiated to the outside through the case 2, reducing the exhaust heat recovery rate, and the high temperature of the converter case 2 requires insulation; (b) ) At the beginning of engine/engine startup, the exhaust gas temperature is low and the catalyst 6 temperature is also low, so a pool of engine oil may form in the exhaust gas heat exchange section 8, or it may be emitted as oil smoke, resulting in an increase in exhaust resistance or an appearance problem. (C) If a honeycomb type catalyst is used as the catalyst 6, the reaction temperature cannot be raised due to the heat resistance of the carrier and the fixed catalyst layer 5, so if the amount of combustibles in the exhaust gas is reduced, the purification efficiency will be reduced. There are problems (a) to (C) above, in which the amount of water is significantly reduced.

Next, the model shown in Fig. 2 has a case cooling layer 9 as a heat exchange layer inside the converter case 2, compared to the model shown in Fig. 1.
Although the problem of the high temperature of the case shown in FIG. 1q is solved, the other problems are the same as those in FIG. 1.

Next, in the model shown in FIG. 6, compared to the model shown in FIG. 2, the fixed catalyst bed 5 is arranged so as to be in direct contact with the case cooling layer 9, so that the catalyst carrier and the fixed bed 5 are cooled. The catalyst temperature decreases due to cooling by the layer 9, and the catalyst carrier temperature and the fixed layer 5vf also decrease, although the carrier temperature also decreases, resulting in a decrease in exhaust gas purification efficiency. Further, other problems are the same as those in FIG.

Next, the type shown in Fig. 4 has a Berebbi type catalyst layer 10. In this case, the reaction temperature can be raised, but if the amount of combustibles in the exhaust gas is relatively small, the purification efficiency is low. As a result, the problem of oil puddles and oil smoke cannot be improved.

C) Object of the Invention An object of the present invention is to provide a catalytic converter with a heat exchange seal that has a high exhaust heat recovery rate and purification efficiency, and prevents oil accumulation and white smoke.

2) Structure of the Invention The catalytic converter with heat exchanger of the present invention includes a converter case, an oil catcher (connected to a non-gas gas supply and provided in the case), and a front oil catcher. a pellet-type catalyst layer adjacent to the catcher and disposed to allow exhaust gas passing through the oil catcher to pass therethrough and to preheat the exhaust gas passing through the oil catcher; It is equipped with a case heat exchange section that is provided to cool the passing exhaust gas by exchanging heat with the fluid to be heated.

e) Examples Hereinafter, examples of the catalytic converter with heat exchanger according to the present invention will be described with reference to FIG.

The engine (7'i'i') is used to drive the compressor of a heat bop type air conditioner that performs heating and hot water supply operation. At the same time, the heat bong type refrigerator can also be used as a heat source for all hot water supply.

In Figure 5, the engine exhaust gas has an exhaust gas population of 1
The exhaust gas population -1 is connected to an oil catcher 11 provided inside the converter case 2. Case 2μ is generally made of stainless steel,
The oil catcher 11 is generally made of wire mesh, foamed metal, or the like.

A pellet-type catalyst layer 12 is provided adjacent to the outside of the oil catcher 11, and the exhaust gas that is introduced from the exhaust gas population 1 and has passed through the entire rt oil catcher 11 is reversed and touched from the bottom viL end of the oil catcher 110. When the exhaust gas passes through the oil catcher 12, heat is generated by oxidation in this catalyst layer, so that the exhaust gas passing through the oil catcher 11 can be preheated. A case heat exchange section 14 is provided inside the converter case 2, and a cylindrical space reheating section 16 is formed between the inner circumference of the case heat exchange section 14 and the outer circumference of the outer cylinder of the catalyst no. Then, the exhaust gas that has passed through the catalyst layer 12 is reversed from the downstream end of the catalyst 7f412 and regenerated 7Jl] heat 1
5316, and is cooled by exchanging heat with a fluid to be heated, such as city water, passing through the case heat exchange section 14.

The downstream end of the reheating section 15 is connected to the exhaust gas outlet 16 via the heated fluid heat exchange section 15, and the exhaust gas that has passed through the reheating section 13 follows the heated fluid heat exchange section 15 and becomes the exhaust gas. It is designed to be discharged from an outlet 16. On the other hand, the broken egg thermofluid heat exchange section 15 is located at the upstream end or heated fluid inlet 17.
The downstream side is connected to the heated fluid outlet 18 via the case heat exchanger 14, and the heated fluid heat exchanger 15
In the exhaust gas and the fluid to be heated, for example, city water, heat is exchanged.

Next, the action of the catalytic converter with heat exchanger according to the present invention will be explained. Since the exhaust gas that has flowed in from the engine exhaust gas population 1 has a particularly low temperature at the initial stage of engine startup,
The oil content is removed by the oil catcher 11, but when the exhaust gas temperature rises after the engine is started, the combustion of combustible content begins in the catalyst layer 12, and the oil is gasified by the heat, and the oil content is Pass by. 1. The oil caught by the oil catcher 11 at the initial stage of engine startup is heated and gasified by the catalyst layer 12.
is carried along with the exhaust residue. .

The exhaust gas slightly preheated by the oil catcher 11 is guided to the pellet type catalyst layer 12, where combustible components such as methane and carbon oxide in the exhaust gas are oxidized and burned. The temperature of the rice feeding catalyst layer and the temperature of the exhaust gas rise. The high-temperature exhaust gas is introduced into the vIJ heating section 16, where it flows along the wall surface of the case heat exchange section 14, exchanging heat, and converting it into the exhaust gas heating section C.
Yu decreases. At the time of decomposition, the catalyst no. 12 is insulated by the exhaust gas flowing along the wall surface. Next, the IC exhaust gas enters the heated fluid heat exchange section 15, undergoes heat exchange, and is further lowered in temperature before being discharged from the exhaust gas outlet 16.

7 Jl] Thermal fluid, for example, city water is υ mouth thermal fluid population 17
The fluid flows into the IJ in the heated fluid heat exchange section 15.
11, and further heated in the reheating section 16 while passing through the case heat exchange section 14, and the broken egg heat flow stops L118.
It was derived from , and has been used for hot water supply, heating, etc. for a long time.

・＼) Effects of the Invention The heat exchanger side-mounted catalytic converter according to the present invention has the entire case heat exchange section inside the case, which prevents heat radiation from the case4), and also provides an oil catcher. Therefore, it is possible to reduce oil accumulation and oil smoke generation at the beginning of the engine startup, and by storing oil at the beginning of the engine startup, the catalyst 1
When the temperature of the tank rises, the oil is evaporated and burned to prevent oil buildup and white smoke.

In addition, it is possible to preheat the exhaust gas with a pellet-type catalyst, so even when there are few combustible components, it is possible to reduce the low purification efficiency. We created a flow of exhaust gas that makes it easy to replace.
The heated fluid heat exchange section can be simplified and an increase in discharge resistance 710 can be avoided.

In particular, the present invention is most suitable for two-stroke engines that burn lubricating oil.

[Brief explanation of drawings]

Figures 1 to 4 are diagrammatic explanatory diagrams of a conventional catalytic converter; 1... Exhaust gas inlet 2... Converter case 11... Oil catcher 12... Bullet type catalyst layer 16... Patent attorney Isao Fujimoto

Claims (1)

[Claims] a converter case, an oil catcher connected to the exhaust gas intake and provided in the case, adjacent to the oil catcher so that the exhaust gas passing through the oil catcher can pass therethrough, and preheating the exhaust gas passing through the oil catcher. A case heat exchange part is provided inside the case so that the exhaust gas passing through the catalyst layer 'fc is cooled by exchanging heat with the fluid to be heated. A catalytic converter with a heat exchanger.