JPH0224893Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] Industrial application field...The present invention relates to a silencer that can collect dust, purify exhaust gas generated from an internal combustion engine, recover waste heat, and muffle sound. It is.

Conventional technology: Conventional gasoline engines use catalysts to purify exhaust gas, but they have no noise reduction effect and have many problems in terms of cost and longevity. In addition, the need for purifying and silencing the exhaust gas of diesel engines, which have large dust concentrations and suspended particles, is greater than that of gasoline engines, but there are many problems that are difficult to solve. There are similar problems. For this reason, many institutions emit untreated exhaust gas, causing air pollution such as photochemical smog and noise pollution, which has become a social problem. On the other hand, despite the fact that thermal energy is used in many fields such as agricultural heating, indoor heating, hot water, and hot air supply, waste heat is not recovered from exhaust gas or expensive heat exchangers are installed separately. The current situation is that the vehicles are operated uneconomically.

Problems that the invention aims to solve: This invention purifies the exhaust gas generated from the internal combustion engine, attenuates and muffles the exhaust noise, and also uses the amount of heat contained in the exhaust gas to reduce the heat radiator cooling water attached to the internal combustion engine. After raising the temperature of water and using this hot water as a heat source for agricultural purposes, indoor heating, etc., it can be returned and circulated as cooling water for the radiator attached to the engine, or it can raise the temperature of running water from another system and use it for hot water supply. It eliminates many of the disadvantages that are difficult to solve with the conventional technology mentioned above, is effective in terms of pollution control and energy conservation, has low pressure loss, is lightweight and compact, and reduces equipment costs and maintenance costs. It is an object of the present invention to provide a muffler that has the functions of efficiently collecting and purifying exhaust gas, recovering waste heat, and muffling noise.

[Structure of the idea]

Means for Solving the Problems...In order to achieve the above object, the present invention comprises a silencer for an internal combustion engine including a dust collection section and a waste heat recovery section, and the dust collection section includes:
In addition to providing an exhaust gas inlet to take in the exhaust gas discharged from the exhaust pipe of the internal combustion engine, a cathode mechanism is provided to form a cathode and electrically ground within the dust collecting section, and an anode is supplied with high voltage from the outside. The dust collector electrode is made of an outer cylinder of the dust collector and an inner cylinder dust collector formed of a perforated plate. A plurality of linear discharge electrodes are installed passing between the spark electrode and
The waste heat recovery section is formed with an exhaust gas passage that guides the exhaust gas that has passed through the filter medium of the dust collection section to the exhaust gas outlet, and the dust collector outer tube of the dust collection section and the waste heat recovery outer tube of the waste heat recovery section are connected. It has the structure of an exhaust gas dust collection waste heat recovery muffler that is removably connected.

An embodiment of the above configuration shown in the drawings will be described as follows.

FIG. 1 is a longitudinal sectional view showing one embodiment of the exhaust gas dust collection waste heat recovery silencer for internal combustion engines of the present invention, which is composed of a dust collection section M and a waste heat recovery section N. Part M has a cylindrical shape with one side open, and has an exhaust gas inlet 1 connected to the dust collection chamber 3 in the dust collector outer cylinder 4 on the outer peripheral surface of the dust collector outer cylinder 4 which has a flange formed on the open part. Form a protrusion. Above exhaust gas inlet 1
The internal diameter cross-sectional area of the dust collection chamber 3 is significantly smaller than the diametrical cross-sectional area of the exhaust gas inlet 1.
A filter medium 2a for removing large suspended particles 12 is provided inside. In addition, as shown in FIGS. 1 and 2, inside the dust collection chamber 3, there are installed so that the axis of the inner cylinder dust collection pole 5 is aligned with the axis of the dust collector outer cylinder 4.
The inner cylinder dust collection electrode 5 is held by a holding plate 6, and the position other than the inner cylinder dust collection electrode 5 in the dust collection chamber 3 is, for example, near the open part of the dust collector outer cylinder 4,
Insulators 7, 7, 7, 7 are fixed to the circumferential wall position of the dust collector outer cylinder 4 that is symmetrical with respect to the axis of the dust collector outer cylinder 4, and a discharge electrode is supported between the insulators 7, 7, 7, 7. The tools 8, 8 are stretched under tension. The dust collection chamber 3 includes a dust collector outer cylinder 4, an inner cylinder dust collection electrode 5, and a holding plate 6.
constitute a cathode mechanism, and are electrically grounded to form a cathode.

The inner tube dust collection electrode 5 is formed into a cylindrical shape by a perforated plate, and a plurality of linear discharge electrodes 9, 9 pass through its axis and between the inner tube dust collection electrode 5 and the dust collector outer tube 4. …
is stretched under tension between the discharge support 8 and the insulator 7 fixed to the surface of the dust collector outer cylinder 4 opposite to the open part.

The discharge support 8 and the linear discharge electrode 9 are each electrically connected to a resistor 23 electrically connected to the power distribution device 11 of the ignition device 10 attached to the internal combustion engine, and are appropriately adjusted by the resistor 23. An anode mechanism that forms an anode is formed by the high voltage applied, and a dust collection electrode is formed by the cathode mechanism and the anode mechanism.

A filter medium 2b is provided in the open part of the dust collector outer cylinder 4.

The waste heat recovery section N has a cylindrical shape with a flange that is open at one end and has a diameter equal to the outer diameter of the flange of the dust collector outer cylinder 4 and the inner and outer diameters of the dust collector outer cylinder 4. It has a heat recovery device outer tube 13, a gasket 21 is interposed between the flanges of the dust collector outer tube 4 and the waste heat recovery device outer tube 13, and both flanges are airtightly connected by flange bolts 22. 22 facilitates cleaning, maintenance, inspection, and repair of the inside of the dust collection chamber 3 and the waste heat recovery device outer cylinder 13.

Inside the waste heat recovery device outer cylinder 13 is a filter material 2 of the dust collection section M.
An exhaust gas passage 24 is provided to guide the exhaust gas that has passed through b to the exhaust gas outlet 20. A filter medium 2c is provided within the exhaust gas outlet 20. Further, in the illustrated embodiment, a plurality of water pipes 14 are installed in the waste heat recovery device outer cylinder 13 so as to increase the heat transfer area and the heat passage rate, and the water pipes 14 are airtightly isolated from the exhaust gas passage 24. 1
One end of 4 is connected to a water inlet 15 for flowing water 19 from a radiator R attached to the internal combustion engine E, and as shown in FIGS. A branch pipe 16 is provided, and a water outlet 17 for collecting and discharging the water that is branched and passes through the plurality of water pipes 14 is provided. Reference numeral 18 denotes a header, which has the same structure as the branch pipe 16.

Function... As shown in Fig. 1, in the exhaust gas discharged from the exhaust pipe of the internal combustion engine, large suspended particles 12 are filtered from the exhaust gas inlet 1 by the filter material 2a, and the cross-sectional area is significantly larger than that at the exhaust gas inlet 1. The flow changes direction and flows into the large dust collection chamber 3. As a result, the volume of the exhaust gas is rapidly expanded to reduce the flow velocity and pressure loss, and by changing the flow direction, the exhaust noise is significantly reduced, and the dust collection described below is It enters the dust collection chamber 3, is further filtered by the filter medium 2b provided in the direction of movement, passes from the waste heat recovery device outer cylinder 13 to the filter medium 2c, and is released into the atmosphere from the gas outlet 20. or reused.

The inner cylindrical dust collecting electrode 5 is a cylinder formed from a perforated plate, and a plurality of linear electrodes 9 are arranged around the axis and around the inner cylinder. Therefore, an unequal electric field is generated in the vicinity of the inner cylindrical dust collection electrode 5, and a corona discharge is generated between it and the linear discharge electrode 9, rapidly and efficiently positively charging the suspended particles 12, and the exhaust gas is perpendicular to the flow,
The separation is allowed to proceed at a rate greater than the flow rate of the exhaust gas. Some of the charged suspended particles 12 collide with the inner and outer surfaces of the inner tube dust collector electrode 5, lose their charge and become attached, or pass through the holes or directly collide with the outer tube 4 of the dust collector. It loses charge and accumulates. Some of the remaining suspended particles 12 flow into the dust collection chamber 3 with a uniform electric field formed by the high-voltage linear discharge electrode 9 and the grounded dust collector outer cylinder 4, and immediately The dust collides with and adheres to the inner surface of the dust collector outer cylinder 4, and is rapidly collected and purified. During this time, the flow velocity of the exhaust gas is reduced again, and the exhaust gas flows out and flows through the holes in the inner cylinder dust collecting electrode 5 formed of a perforated plate, thereby causing resonance and reducing the exhaust noise.

The dust-collected and purified exhaust gas flows into the waste heat recovery device outer cylinder 13 through the filter medium 2b. Inside the waste heat recovery device outer cylinder 13, a plurality of water pipes 14, which are airtightly isolated from the exhaust gas, are installed to increase the heat transfer area and heat passage rate, and one is connected to a radiator attached to the engine. The flowing water from the pipe is branched at the water inlet 15 and connected to the water pipe 14.
It is connected to a branch pipe 16 for flowing into the water. The other end is connected to a header 18 having the same structure as the branch pipe, and collects the running water 19 in the water pipe 14 to reach the running water outlet 17.

When the flowing water 19 in the water pipe 14 is used in the dust collection waste heat recovery silencer S ₁ for heating shown in Fig. 5, the temperature of the flowing water 19 is almost equal to the temperature at the outlet of the radiator attached to the internal combustion engine. , the temperature is further increased by the amount of heat of the exhaust gas flowing around the outer circumference of the water pipe 14, and the amount of heat is increased.
After being used for heating etc. to reduce the amount of heat and reduce the temperature to the temperature equivalent to the internal combustion engine radiator inlet temperature,
It is returned to the internal combustion engine radiator and circulated again. On the other hand, the exhaust gas that has undergone heat exchange becomes lower in temperature and volume and is released into the atmosphere, or is reused as a heat source for hot water or hot air.

Next, an example of the usage state of the above embodiment will be explained with reference to the system diagram shown in FIG. 5.

Figure 5 shows the flow of exhaust gas G, the flow of heating water _W1 ,
FIG. 2 is a system diagram showing the flow of hot water W ₂ and the wiring of a high-voltage power source for dust collection. Exhaust gas G generated by the internal combustion engine E that drives the load L of a generator, vehicle, etc. flows into the dust collection chamber 3 in the dust collection waste heat recovery silencer S ₁ for heating, and passes around the water pipe 14. Rear, switching valve V
Then, it proceeds to the atmosphere side and/or to the dust collection waste heat recovery silencer _S2 side for hot water supply. If the pipe line on the side of the water supply waste heat recovery silencer S ₂ is shut off using the switching valve V, the exhaust gas G will be released to the atmosphere, or if warm air is supplied and the pipe line on the atmosphere side is shut off, the exhaust gas G will be released to the atmosphere. Flows into the dust collection waste heat recovery silencer S ₂ for hot water supply. The exhaust gas G flowing into the dust collection waste heat recovery silencer S ₂ for hot water supply is
It passes through the dust collection chamber 3 and the outer periphery of the water pipe 14 and is released into the atmosphere, or hot air is supplied.

Heating water _W1 flows out from the radiator R attached to the engine,
After flowing into the water pipe 14 in the dust collection waste heat recovery and silencer _S1 for heating, it is returned to the radiator R attached to the internal combustion engine and circulated. On the other hand, the hot water supply W ₂ is supplied from a pipe line separate from that of the heating water W ₁ and flows into the hot water storage tank T via the water pipe 14 in the dust collection waste heat recovery muffler S ₂ for hot water supply.

In addition, the high voltage supplied to the dust collection chamber 3 is wired from one pole branched from the positive pole of the power distributor D attached to the internal combustion engine, and the other branched pole is connected to the spark plug of the engine E along with the non-branched pole. It is wired to P.

When the flowing water 19 in the water pipe 14 is used in the dust collection waste heat recovery silencer S ₁ for heating shown in FIG. 5, the temperature of the flowing water 19 is almost equal to the outlet temperature of the radiator attached to the engine. The temperature of the exhaust gas flowing around the outer periphery of the water pipe 14 is further increased to increase the heat quantity, and the heat quantity is reduced by being used for heating etc., and after the temperature is lowered to a temperature equivalent to the engine radiator input temperature, It is returned to the engine radiator and circulated again. On the other hand, the exhaust gas that has undergone heat exchange is either cooled to a low temperature, reduced in volume, and released into the atmosphere, or reused as a heat source for temperature or hot air.

〔effect〕

As explained above, this idea achieves exhaust gas purification using catalysts, or dust collection and purification of exhaust gas that could not be solved with catalysts, without relying on expensive and structurally complex equipment. It has both waste heat recovery and noise reduction effect,
The exhaust gas is collected and purified by electrostatic precipitator using a high-voltage power supply (attached to the engine), and the purified exhaust gas is guided to the waste heat recovery section, which causes the adhesion of suspended matter that reduces efficiency in the heat exchange section. It changes the flow direction of the exhaust gas at the dust collection part and expands its volume, reducing exhaust noise and pressure loss.It is also lightweight, compact, and can be installed at low cost. It exhibits many features as an exhaust gas purifier, waste heat recovery, and muffler for industrial internal combustion engines. Therefore, significant effects can be expected if applied not only to land internal combustion engines but also to vehicle engines, especially diesel engines. In particular, the present invention has a cathode mechanism and an anode mechanism of the dust collector, which are connected to a linear radiation source stretched between the dust collector outer cylinder and inner cylinder dust collection electrode, and between the dust collector outer cylinder and inner cylinder dust collection electrode. Since it is formed from electrodes, the dust collection and noise silencing effect is performed effectively, and since the dust collector outer cylinder and the waste heat recovery apparatus outer cylinder are removable, internal cleaning, maintenance inspection, and repair are easy. can.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention,
Figure 1 is a front longitudinal cross-sectional view, Figure 2 is a cross-sectional view taken along line A-A in Figure 1, Figure 3 is a cross-sectional view taken along line B-B in Figure 1, and Figure 4 is a cross-sectional view taken along line C-C in Figure 1. FIG. 5 is a system diagram showing the flow of exhaust gas, heating water, hot water supply water, and an outline of the electric circuit. E... Internal combustion engine, L... Generator driven by the engine, load of vehicles, etc., G... Exhaust gas, S ₁ ... Dust collection waste heat recovery silencer for heating, V... Switching valve, S ₂ …
... Dust collection waste heat recovery silencer for hot water supply, W ₁ ... Heating water, R ... Heat radiator attached to the engine, W ₂ ... Hot water supply,
T...Hot water tank, D...Power distributor attached to the engine, P...
Spark plug, 1...Exhaust gas inlet, 2a, 2b, 2c...
...filter material, 3...dust collection chamber, 4...dust collector outer cylinder,
5...Inner tube dust collection electrode, 6...Inner tube dust collection electrode holding plate, 7...Insulator, 8...Discharge electrode support, 9...
... Linear discharge electrode, 10 ... Ignition device, 11 ... Distributor, 12 ... Suspended particles, 2b ... Filter medium, 13 ...
Waste heat recovery device outer cylinder, 14... Water pipe, 15... Running water inlet, 16... Branch pipe, 17... Running water outlet, 18...
...header, 19...running water, 20...gas outlet, 2
1... Gasket, 22... Flange bolt, 2
3...Resistor, 24...Exhaust gas passage.

Claims (1)

[Scope of utility model registration request] A silencer for an internal combustion engine is composed of a dust collection part and a waste heat recovery part, and the dust collection part is provided with an exhaust gas inlet for taking in the exhaust gas discharged from the exhaust pipe of the internal combustion engine, and a , forming the cathode;
A dust collection electrode is formed of a cathode mechanism that is electrically grounded and an anode mechanism that forms an anode by supplying high voltage from the outside, and the dust collection electrode is formed of a dust collector outer cylinder and a perforated plate. The dust collector consists of an inner cylindrical dust collection electrode, and a plurality of linear discharge electrodes are installed passing between the dust collector outer cylinder and the inner cylinder dust collection electrode, and the waste heat recovery section is equipped with a filter material from the dust collection section. Dust collection and waste heat recovery for exhaust gas that forms an exhaust gas passage that guides the passed exhaust gas to the exhaust gas outlet, and removably connects the dust collector outer cylinder of the dust collection section and the waste heat recovery outer cylinder of the waste heat recovery section. Silencer.