JPS6214321Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention combines a deodorizing device that deodorizes a gas containing odorous substances by processing it through oxidation and decomposition reactions at high temperatures, and a steam engine that operates on the Rankine cycle. This is related to the prime mover.

Conventionally, deodorizing devices that utilize combustion reactions have been provided to deodorize gases containing substances that cause bad odors. This type of deodorizing equipment introduces gas containing solvent vapor, paint particles, mist, etc. generated during the painting process into the combustion chamber, adds fuel, and removes odorous substances through oxidation and decomposition reactions at high temperatures. The combustion chamber discharges high-temperature exhaust gas from which odorous substances have been removed.

In addition, conventionally, the high-temperature exhaust gas discharged from this type of deodorizing equipment is used to generate steam for use in processes, etc. using an exhaust heat boiler, or the steam is used to drive a steam turbine to generate power and electricity. Or, it was used to preheat the gas to be treated before it was introduced into the combustion chamber.

However, in recent years, companies have been trying to save energy, and as a result, the amount of water vapor required in the process has tended to be reduced. Furthermore, with regard to the method of using high-temperature exhaust gas from a deodorizing device to preheat the gas to be treated, the temperature inside the combustion chamber becomes higher than necessary, resulting in a problem in that NOx in the high-temperature exhaust gas increases. Under these circumstances, in order to effectively utilize the high-temperature exhaust gas from the deodorizing device, a method of obtaining power with a wide range of motive power and versatility has many practical advantages. However, since the steam turbines conventionally used in this method use water as the working fluid, the efficiency of the Rankine cycle is low and the steam turbines are not practically satisfactory.

By the way, it is known that the efficiency of the cycle can be improved by using an organic medium such as Freon or toluene as the working fluid of the Rankine cycle. However, in the Rankine cycle using an organic medium, the organic medium decomposes little by little as it is heated and cooled during the cycle.
Generates noncondensable gases during the cycle. Therefore, in order not to reduce the efficiency of the cycle, it is necessary to discharge the non-condensable gas in the condenser to the outside of the system. However, the Rankine cycle using organic media has not been put into practical use due to problems such as the decomposition products of organic media containing components with toxicity and irritating odors, and the fact that mist of organic media is also discharged during discharge. was difficult.

This invention was made in view of the above circumstances,
By combining a deodorizing device and a prime mover based on the Rankine cycle using an organic medium, we have created a deodorizing device and a prime mover that can utilize high-temperature exhaust gas with high efficiency and solve the problem of non-condensable gases discharged from the Rankine cycle. A high-temperature gas conduit is provided to guide the high-temperature exhaust gas of the deodorizing device to the boiler of the Rankine cycle, and a non-condensable gas conduit that guides the non-condensable gas discharged from the Rankine cycle to the combustion chamber of the deodorizing device. It is characterized by providing a conduit.

Embodiments of the present invention will be described below with reference to the drawings.

The figure is a block diagram showing one embodiment of the present invention. In this figure, numeral 1 is a deodorizing device, and 2 is a prime mover.

The deodorizing device 1 includes a burner 4 inside a combustion chamber 3, a pipe 5 for supplying fuel to the burner 4, and a pipe 6 for introducing a gas to be treated into the combustion chamber 3. is established. Further, one end of an exhaust gas pipe 7 for discharging high-temperature exhaust gas after treatment is connected to the combustion chamber 3, and the other end of this exhaust gas pipe 7 is connected to the prime mover 2.

On the other hand, the prime mover 2 constitutes a Rankine cycle using an organic medium as a working fluid, and the condenser 10
, a pump 11 , a boiler 12 , and a turbine 13 .

The condenser 10 includes a cooler 10a therein, and is supplied with cooling water via pipes 10b, 10b. This condenser 10 is
The gaseous working fluid introduced from the turbine 13 is cooled and condensed by the cooler 10a.

Further, a vacuum pump 15 is connected to the condenser 10 for removing air entering the cycle from the outside and non-condensable gas generated within the cycle. An exhaust port of the vacuum pump 15 is connected to one end of an exhaust pipe 16 for exhausting non-condensable gas. The other end of the exhaust pipe 16 is connected to the pipe 6 of the deodorizing device 1, and the non-condensable gas discharged from the condenser 10 is passed through the exhaust pipe 16 and the pipe 6.
The gas is sent into the combustion chamber 3 through the gas chamber, and is deodorized together with the gas to be treated.

A pump 11 is connected to the condenser 10 via a pipe 18, and a pipe 19 is connected to the pump 11.
A boiler 12 is connected through the boiler. pump 1
1 is for pumping the working fluid condensed inside the condenser 10 to the boiler 12.

Further, the exhaust gas pipe 7 drawn out from the deodorizing device 1 is connected to the boiler 12, so that the working fluid and the high-temperature exhaust gas exchange heat inside the boiler 12. This boiler 12 is further provided with an exhaust pipe 20 so that the exhaust gas after heat exchange is discharged into the atmosphere.

Further, the boiler 12 and the turbine 13 are connected through a pipe 21 so that the working fluid heated and vaporized in the boiler 12 is guided to the turbine 13. The turbine 13 expands the heated and high pressure vaporized working fluid, thereby
It is designed to obtain mechanical energy such as rotation of a turbine. Although not shown, the turbine 1
Other devices, generators, etc. that use the turbine as a power source are connected to the rotating shaft 3.

The turbine 13 and the condenser 10 are connected by a pipe 22 so that the working fluid expanded inside the turbine 13 is guided to the condenser 10.

In the above configuration, the condenser 10, the pump 1
1, boiler 12, and turbine 13 constitute a Rankine cycle.

Next, the operation of the above system will be explained.

First, in the deodorizing device 1, a gas to be treated containing an odorous substance is introduced while fuel is supplied to the burner 4 inside the combustion chamber 3 for combustion, and the odorous substance is treated by oxidation reaction, decomposition reaction, etc. Exhaust as odorless and harmless high-temperature exhaust gas.

High-temperature exhaust gas discharged from the deodorizing device is introduced into the boiler 12 through the exhaust gas pipe 7. Inside the boiler 12, the working fluid in a liquid state that is pumped by the pump 11 comes into thermal contact with the high-temperature exhaust gas and is heated, and the residual heat of the working fluid during the Rankine cycle,
A process of evaporation, or residual heat, evaporation, or superheating takes place.
As a result, the working fluid receives the thermal energy of the high-temperature exhaust gas and becomes a high-temperature, high-pressure gas state.
It is pumped toward the turbine 13.

In the turbine 13, the working fluid expands adiabatically,
Thermal energy is converted into mechanical energy and extracted to the outside as the rotation of a turbine. The working fluid adiabatically expanded in the turbine 13 is sent to the condenser 10.

In the condenser 10, the gaseous working fluid comes into contact with the cooler 10b and undergoes an isobaric condensation process during the cycle.

The above-mentioned condensed working fluid is pressurized by the pump 11 and then supplied to the boiler 12 again to repeat the cycle of exchanging heat with the high-temperature exhaust gas, and serves as a medium for converting the thermal energy of the high-temperature exhaust gas into mechanical energy. act.

Furthermore, in the above cycle, the organic medium as the working fluid is repeatedly heated and cooled, so it may be decomposed little by little to produce non-condensable gas. Furthermore, since the pressure inside the condenser 10 is lower than atmospheric pressure depending on the type of organic medium, air may enter the cycle from the joints of the pipes or the like. These non-condensable gases increase the pressure inside the condenser 10 and cause a decrease in the efficiency of the cycle, so the vacuum pump 15 removes the non-condensable gases from the cycle. The non-condensable gas discharged by the vacuum pump 15 is sent into the combustion chamber 3 of the deodorizing device 1 through the exhaust pipe 16, and is treated together with the gas to be treated at high temperature to make it odorless and odorless.
It becomes a harmless exhaust gas.

As mentioned above, in the system of the present invention,
The problem of processing non-condensable gases, which was a problem with the Rankine cycle using an organic medium, was solved by using the deodorizer 1 combined as the heat source of the Rankine cycle, and at the same time, the problem of non-condensable gas treatment, which was a problem with the Rankine cycle using organic media, was solved by using the deodorizer 1 combined as the heat source of the Rankine cycle. The thermal energy of high-temperature exhaust gas is
It is possible to recover it as motive power or electricity using the Rankine cycle using highly efficient organic mediating. Therefore, according to the prime mover system that utilizes the high-temperature exhaust gas of the deodorizing device of the present invention, energy can be recovered from the high-temperature exhaust gas with high efficiency through the Rankine cycle using an organic medium. It is now possible to operate the system without emitting into the atmosphere non-condensable gases with toxic components or pungent odors, which were problems when using the liquid as a working fluid.

In the above embodiment, an example was described in which a deodorizing device is used that heats the gas to be treated with a burner inside the combustion chamber to oxidize and decompose it, but the present invention is not limited to this. It is also possible to use a type in which a catalyst suitable for decomposing the odor components to be treated is placed inside, and the gas to be treated is preheated and guided to a post-combustion chamber where it is treated by a catalytic reaction. The high-temperature gas generated by the treatment and the treated exhaust gas may be mixed to serve as a heat source for the prime mover.

In addition, by using an organic medium that is the same as or similar to the odorous substance to be deodorized (for example, toluene when treating toluene vapor generated during painting) as the organic medium used in the Rankine cycle, it is possible to introduce the organic medium into the combustion chamber. Since the gas to be treated and the non-condensable gas can be deodorized under similar conditions, there is an advantage that the operating conditions of the deodorizing device can be easily set and optimized.

As explained above, the prime mover using the high-temperature exhaust gas of the deodorizing device according to the present invention combines the deodorizing device with a Rankine cycle prime mover using an organic medium, and uses the high-temperature exhaust gas of the deodorizing device as a heat source for the prime mover. In addition to providing a high-temperature exhaust gas conduit, it also includes a non-condensable gas conduit for discharging non-condensable gas generated during the Rankine cycle and treating it with a deodorizing device, so it has previously been prevented from being put into practical use. Since the non-condensable gas containing components with toxic and irritating odors, which were the cause of the system, can be efficiently processed within the system, the Rankine cycle, which uses highly efficient organic media, can be applied to recover thermal energy. Therefore, it is possible to realize a system that combines a deodorizing device and a prime mover that can significantly improve energy recovery efficiency.

[Brief explanation of the drawing]

The figure is a block diagram showing one embodiment of the present invention. 1... Deodorizing device, 2... Prime mover (steam prime mover), 3... Combustion chamber, 6... Piping for gas to be treated, 7... Exhaust gas pipe (high temperature exhaust gas conduit), 10
...Condenser, 11...Pump, 12...Boiler,
13...Turbine, 15...Vacuum pump, 16...
...Exhaust pipe (non-condensable gas conduit).

Claims (1)

[Scope of utility model registration request] A deodorizing device introduces a gas to be treated and fuel into a combustion chamber, and processes and removes odorous substances contained in the gas to be treated at high temperature. A steam motor consisting of a cycle of heating and introducing the generated working fluid gas into an expander to generate mechanical energy, and returning the gas to the condenser to liquefy it, and the deodorizing device. A high-temperature gas conduit for guiding high-temperature gas as a heat source for the steam engine, and a non-condensable gas conduit for taking out non-condensable gas inside the condenser and guiding it to the combustion chamber. A prime mover that uses high-temperature gas for deodorizing equipment.