JP6846940B2 - Steam generator - Google Patents

Description

The present invention relates to a steam generator provided with a boiler capable of storing hot water supplied from the outside and heating the hot water inside by the heat generated by a heat source to generate steam.

Conventionally, as a steam generator, a boiler is known in which hot water supplied from a hot water source via a hot water pipe is stored inside, and the hot water is heated by heating by a combustion device to generate steam (patented). See Document 1).
To add an explanation, the boiler temporarily stores water in the boiler drum and heats the hot water stored in the boiler drum by a combustion device to generate steam. Chemicals such as oxygen scavengers (corrosive inhibitors) and anti-scale agents are dissolved in the hot water in the boiler drum, and when a part of the hot water evaporates as steam, the chemicals are concentrated and concentrated. Will be higher. The concentrated chemicals promote corrosion in the boiler drum, or solidify and adhere to the inside of the boiler drum or pipes as scale, which is a factor that hinders the generation of steam in the boiler. For this reason, the boiler is provided with a blow water discharge pipe that communicates with the boiler drum, and is also provided with an on-off valve that can open and close the blow water discharge pipe. Blow water is discharged periodically through the blow water discharge pipe.
Here, when the boiler is operating, the blow water has exhaust heat. Therefore, in the technique disclosed in Patent Document 1, in order to recover the exhaust heat possessed by the blow water, the blow water has exhaust heat. It is known to have a blow water heat exchanger that exchanges heat between the blow water and the hot water before being supplied to the boiler.

Japanese Unexamined Patent Publication No. 2015-212583

Generally, in the steam generator described above, a configuration is adopted in which the hot water supplied to the boiler is preheated by the exhaust heat of the heat source that heats the hot water in the boiler. Therefore, even if a configuration for recovering the exhaust heat possessed by the blown water is adopted as in the technique disclosed in Patent Document 1, the exhaust heat is often not effectively used, and from the viewpoint of improving energy efficiency, the exhaust heat is often not used effectively. There was room for improvement.

The invention according to the present application has been made in view of the above-mentioned problems, and an object thereof is to be able to satisfactorily recover thermal energy as exhaust heat from a boiler with a relatively simple configuration with high maintainability, and to recover the heat. The point is to provide a steam generator capable of appropriately converting the generated thermal energy into energy in demand such as cold energy.

The steam generator for achieving the above purpose is
It is a steam generator equipped with a boiler that can store hot water supplied from the outside and heats the hot water inside by the heat generated by the heat source to generate steam.
The acoustic energy of sound waves between a heater that heats the working medium from the outside, a cooler that cools the working medium from the outside, and the heater and the cooler in an acoustic cylinder filled with the working medium and propagating sound waves. A heat absorber in which the working medium absorbs heat from the outside, a radiator in which the working medium dissipates heat to the outside, a heat absorber, and the radiator, while having at least one prime mover including a first regenerator for amplifying the above. A thermoacoustic engine having at least one acoustic heat pump unit comprising a second regenerator that compresses and expands in a manner in which sound waves consume acoustic energy between them.
A blow water flow path that allows blow water from the boiler to flow through the heater, and
A hot water flow path that leads hot water to the boiler after flowing it through the cooler,
It is provided with a refrigerant circulation path for circulating the refrigerant between the heat absorber and the cold heat utilization unit in which the cold heat possessed by the refrigerant is dissipated and used .
The hot water flow path is a point in which hot water is passed through the radiator and the cooler in the order described, and then guided to the boiler .

According to the above characteristic configuration, first, the blow water is passed through the blow water flow path to the heater of the prime mover, and the hot water is passed through the hot water flow path to the cooler of the prime mover. , A relatively large temperature difference can be formed between the heater and the cooler, and a sound wave having acoustic energy corresponding to the temperature difference can be generated from the first regenerator between the heater and the cooler. ..
The sound generated in this way propagates through the acoustic cylinder and is guided to the acoustic heat pump section, and consumes acoustic energy in the second regenerator, and absorbs heat rather than the temperature at which the radiator dissipates heat from the operating medium to the outside. Since the temperature at which heat is absorbed from the outside to the operating medium can be lowered by the device, hot water (for example, about 20 ° C.) supplied from the outside can be passed through the radiator and the refrigerant can be passed through the heat absorber. Can be lowered to a temperature at which the cooling capacity can be exhibited at a temperature lower than that of hot water.
That is, by adopting this configuration, the exhaust heat (exhaust heat possessed by the blow water), which is often surplus in the steam generator, can be converted into cold heat, which can be effectively used in the cold heat utilization unit. Will be able to.
Incidentally, according to the above-mentioned characteristic configuration, the hot water supplied from the outside flows to the cooler to draw up the heat of the heater and then is supplied to the boiler, so that the hot water is supplied to the boiler in a sufficiently preheated state. To.
Further, since the thermoacoustic engine as in the present invention has a simple configuration without moving parts, there is almost no possibility of failure or the like, maintenance is hardly required, and a highly economical device can be realized.
Further, according to the above-mentioned feature configuration, the hot water supplied from the outside passes through the radiator to pump up the heat of the refrigerant before flowing to the cooler to pump up the heat of the heater, so that the temperature rises even more sufficiently. Warm hot water can be replenished to the boiler, and thermal efficiency can be improved.
From the above, it is possible to satisfactorily recover the thermal energy as exhaust heat from the boiler (particularly, the exhaust heat possessed by the blow water) with a relatively simple configuration with high maintainability, and the recovered thermal energy can be used as cold energy, etc. It is possible to realize a steam generator that can appropriately convert energy into demand.

Further features of the steam generator are
The boiler is provided with a heat transfer portion inside which a heat medium that retains the heat generated by the heat source can flow.
The point is that the heat transfer section and the heater are provided with a heat medium passage flow path through which the heat medium flows in the order described.

According to the above characteristic configuration, a heat medium for heating hot water (for example, combustion exhaust gas) is passed through the heat transfer section of the boiler and then through the heating section of the prime mover of the thermoacoustic engine, so that the boiler is blown. In addition to the exhaust heat possessed by water, other exhaust heat discharged from the boiler can also be converted into acoustic energy by a thermoacoustic engine, and the acoustic energy can be converted into cold energy and used effectively. Therefore, the overall energy efficiency of the steam generator can be further improved.

Further features of the steam generator are
A first flow rate adjusting valve for adjusting the flow rate of blow water flowing through the blow water flow path is provided.
The valve opening degree of the first flow rate adjusting valve is adjusted to an opening degree capable of continuously supplying blow water to the heater.
A second flow rate adjusting valve for adjusting the flow rate of hot water flowing through the hot water flow path is provided.
The opening degree of the second flow rate adjusting valve is adjusted to an opening degree capable of continuously supplying hot water to the radiator.

Normally, the boiler is configured to discharge the blow water when the concentration of chemicals such as oxygen scavenger and anti-scale agent dissolved in the boiler water exceeds a certain level. If there is, blow water will be discharged intermittently.
However, in the invention according to the present application, if the blow water flowing through the heater is intermittently supplied, the prime mover of the thermoacoustic engine cannot stably generate acoustic energy, and eventually the acoustic heat pump unit. It becomes impossible to cool the refrigerant stably with the heat absorber.
According to the above characteristic configuration, the blow water continuously flows through the heater and the hot water continuously flows through the cooler, so that the prime mover of the thermoacoustic engine can stably generate acoustic energy. The refrigerant can be stably cooled by the heat absorber of the acoustic heat pump section.
In particular, the flow rate of blow water flowing through the heater and the flow rate of hot water flowing through the cooler are preferably constant, and further, in a predetermined unit time (for example, a time of several seconds). It is preferable that the amount of heat dissipated from the blow water by the heater and the amount of heat absorbed by the hot water by the cooler are substantially the same.

Further features of the steam generator are
A first flow rate adjusting valve for adjusting the flow rate of blow water flowing through the blow water flow path is provided.
The valve opening degree of the first flow rate adjusting valve is controlled by switching between an open state and a closed state at predetermined time intervals in order to intermittently supply blow water to the heater.

As described above, when adopting a configuration in which a heat medium holding the heat generated by the heating source is supplied to the heater, heat is always supplied to the heater by the heat medium when the boiler is in the steam generation operation. The configuration to be used is adopted. Therefore, even when the blow water is not continuously supplied to the heater, the acoustic energy can be stably generated by the prime mover of the thermoacoustic engine.
That is, in the steam generator having the above-mentioned characteristic configuration, even a conventional steam generating boiler that intermittently discharges blow water as a boiler can satisfactorily generate cold heat from the exhaust heat.
Furthermore, the steam generator for achieving the above object is
It is a steam generator equipped with a boiler that can store hot water supplied from the outside and heats the hot water inside by the heat generated by the heat source to generate steam.
The acoustic energy of sound waves between a heater that heats the working medium from the outside, a cooler that cools the working medium from the outside, and the heater and the cooler in an acoustic cylinder filled with the working medium and propagating sound waves. A heat absorber in which the working medium absorbs heat from the outside, a radiator in which the working medium dissipates heat to the outside, a heat absorber, and the radiator, while having at least one prime mover including a first regenerator for amplifying the above. A thermoacoustic engine having at least one acoustic heat pump unit comprising a second regenerator that compresses and expands in a manner in which sound waves consume acoustic energy between them.
A blow water flow path that allows blow water from the boiler to flow through the heater, and
A hot water flow path that leads hot water to the boiler after flowing it through the cooler,
It is provided with a refrigerant circulation path for circulating the refrigerant between the heat absorber and the cold heat utilization unit in which the cold heat possessed by the refrigerant is dissipated and used.
The boiler is provided with a heat transfer portion inside which a heat medium that retains the heat generated by the heat source can flow.
A heat transfer channel for passing a heat medium in the order described in the heat transfer unit and the heater is provided.
A first flow rate adjusting valve for adjusting the flow rate of blow water flowing through the blow water flow path is provided.
The valve opening degree of the first flow rate adjusting valve is controlled by switching between an open state and a closed state at predetermined time intervals in order to intermittently supply blow water to the heater.
According to the above characteristic configuration, first, the blow water is passed through the blow water flow path to the heater of the prime mover, and the hot water is passed through the hot water flow path to the cooler of the prime mover. , A relatively large temperature difference can be formed between the heater and the cooler, and a sound wave having acoustic energy corresponding to the temperature difference can be generated from the first regenerator between the heater and the cooler. ..
The sound generated in this way propagates through the acoustic cylinder and is guided to the acoustic heat pump section, and consumes acoustic energy in the second regenerator, and absorbs heat rather than the temperature at which the radiator dissipates heat from the operating medium to the outside. Since the temperature at which heat is absorbed from the outside to the working medium can be lowered by the device, hot water (for example, about 20 ° C.) supplied from the outside can be passed through the radiator and the refrigerant can be passed through the heat absorber. Can be lowered to a temperature at which the cooling capacity can be exhibited at a temperature lower than that of hot water.
That is, by adopting this configuration, the exhaust heat (exhaust heat possessed by the blow water), which is often surplus in the steam generator, can be converted into cold heat, which can be effectively used in the cold heat utilization unit. Will be able to.
Incidentally, according to the above-mentioned characteristic configuration, the hot water supplied from the outside flows to the cooler to draw up the heat of the heater and then is supplied to the boiler, so that the hot water is supplied to the boiler in a sufficiently preheated state. To.
Further, since the thermoacoustic engine as in the present invention has a simple configuration without moving parts, there is almost no possibility of failure or the like, maintenance is hardly required, and a highly economical device can be realized.
Further, according to the above-mentioned characteristic configuration, the heat medium for heating the hot water (for example, combustion exhaust gas) is passed through the heat transfer part of the boiler and then through the heating part of the prime mover of the thermoacoustic engine. In addition to the exhaust heat possessed by the blow water, other exhaust heat discharged from the boiler can also be converted into acoustic energy by the thermoacoustic engine, and the acoustic energy can be converted into cold energy and effectively used. By doing so, the overall energy efficiency of the steam generator can be further improved.
Further, as described above, when adopting a configuration in which a heat medium holding the heat generated by the heating source is supplied to the heater, when the boiler is in the steam generation operation, the heater is always heated by the heat medium. Is supplied. Therefore, even when the blow water is not continuously supplied to the heater, the acoustic energy can be stably generated by the prime mover of the thermoacoustic engine.
That is, in the steam generator having the above-mentioned characteristic configuration, even a conventional steam generating boiler that intermittently discharges blow water as a boiler can satisfactorily generate cold heat from the exhaust heat.
From the above, it is possible to satisfactorily recover the thermal energy as exhaust heat from the boiler (particularly, the exhaust heat possessed by the blow water) with a relatively simple configuration with high maintainability, and the recovered thermal energy can be used as cold energy, etc. It is possible to realize a steam generator that can appropriately convert energy into demand.

Further features of the steam generator are
The point is that it is equipped with a power generator that generates electric power from the vibration of sound waves.

According to the above-mentioned feature configuration, the acoustic energy generated by the thermoacoustic engine can be converted not only into cold energy but also into electric power, and energy can be output in various forms according to demand. The electric power can be used as an auxiliary machine of the steam generator.

Schematic configuration diagram of the steam generator according to the embodiment Schematic configuration diagram of the steam generator according to another embodiment Schematic configuration diagram of the steam generator according to another embodiment

The steam generator 100 according to the embodiment has a relatively simple configuration with high maintainability, and can satisfactorily recover the thermal energy as exhaust heat from the boiler 10, and the recovered thermal energy can be used to meet the demand for cold energy and the like. It relates to a steam generator that can be appropriately converted into a certain energy.

Hereinafter, the steam generator 100 according to the embodiment will be described with reference to FIG.
As shown in FIG. 1, the steam generator 100 can store hot water supplied from the outside inside, and heats the hot water inside by the heat generated by an engine (not shown, an example of a heat source). A heater 10 is provided with a boiler 10 for generating steam, and an acoustic cylinder T (one in the embodiment) filled with an operating medium (for example, helium) and propagating sound waves is heated from the outside. At least one or more prime movers 70 including a cooler 72 that cools the operating medium from the outside, and a first regenerator 73 that amplifies the acoustic energy of sound waves between the heater 71 and the cooler 72 (the embodiment). Then, in a form in which sound energy is consumed between the heater 81 in which the working medium absorbs heat from the outside, the radiator 82 in which the working medium dissipates heat to the outside, the heat absorber 81, and the radiator 82. A thermoacoustic engine 90 having at least one acoustic heat pump unit 80 including a second regenerator 83 that compresses and expands (in the embodiment, one) and blow water B from the boiler 10 are passed through the heater 71. The blow water flow path L1 to be flowed, the hot water flow path L2 to guide the hot water W to the boiler after passing the hot water W in the order described in the radiator 82 and the cooler 72, and the cold heat possessed by the refrigerant are dissipated and used. A refrigerant circulation path L3 for circulating a refrigerant between the cold heat utilization unit 30 and the heater 81 is provided.

[Structure related to boiler]
The boiler 10 is connected to a hot water flow path L2 provided with a second flow rate adjusting valve V2 for adjusting the flow rate of hot water W, and passes through combustion exhaust gas E (an example of a heat medium) from an engine (not shown). A heat transfer coil EX1 (an example of a heat transfer unit) connected to the exhaust gas passage L4 is provided inside, and steam St generated by heating hot water W by the heat transfer coil EX1 is guided to the outside. A boiler drum 10a to which the steam flow path L5 is connected is provided.
The steam passage L5 is communicated with and connected to the load device 20 to supply steam to the load device 20. The loader 20 is communicatively connected to the drain storage tank 22 via the drain flow path L6, and the drain flow path L6 is provided with a steam trap 21.
Further, the drain storage tank 22 is communicatively connected to the boiler drum 10a via the drain return passage L7, and the drain return passage L7 includes a first pressure feed pump P1 for pumping drain water and burns with the drain water. It is arranged so that drain water flows through the second heat exchanger EX2 that exchanges heat with the exhaust gas E.
Incidentally, the second heat exchanger EX2 is provided on the downstream side of the heat transfer coil EX1 in the flow direction of the combustion exhaust gas E.

With this configuration, the steam St generated in the boiler drum 10a is supplied to the loader 20, and the drain water mixed with steam from the loader 20 is removed by the steam trap 21 and then the drain storage tank. The drain water stored in 22 is returned to the boiler drum 10a after the exhaust heat of the combustion exhaust gas E is recovered by the second heat exchanger EX2.

The hot water W supplied to the boiler drum 10a is added with a boiler chemical such as an oxygen scavenger (corrosion inhibitor) or a scale inhibitor in order to prevent corrosion and scale adhesion to the boiler drum 10a and the like. In the hot water W in the boiler drum 10a, the oxygen scavenger (corrosion inhibitor) and the scale inhibitor are gradually concentrated with the generation of steam St. In order to keep the concentration of the boiler chemicals below a certain level inside the boiler drum 10a, the boiler drum 10a is provided with a blow water flow path L1 for discharging the blow water B from the boiler drum 10a. In the blow water flow path L1, a first flow rate adjusting valve V1 for adjusting the flow rate of the blow water B is provided.

[Structure related to thermoacoustic engine]
As shown in FIG. 1, the thermoacoustic engine 90 includes an acoustic cylinder T formed by connecting a first loop pipe T1 and a second loop pipe T2, which are filled with an operating medium and propagate sound waves, with a connecting pipe. In this embodiment, the first loop pipe T1 is provided with a single prime mover 70, and the second loop pipe T2 is provided with a single acoustic heat pump unit 80.

Hereinafter, it is composed of a heater 71 that heats the working medium from the outside, a cooler 72 that cools the working medium from the outside, and a first regenerator 73 that amplifies the acoustic energy of sound waves between the heater 71 and the cooler 72. The prime mover 70 will be described.

Although detailed illustration is omitted, the heater 71 extends from the jacket portion (not shown) through which the blow water B passing through the blow water flow path L1 to the inside of the acoustic cylinder T. It consists of fins (not shown). The heater 71 heats the working fluid in a form in which the fins are heated by the blow water B flowing through the jacket portion and heat is conducted from the fins to the working fluid inside the acoustic cylinder T.

The cooler 72 includes a jacket portion (not shown) through which the hot water W of the hot water passage path L2 passes, and fins (not shown) extending from the jacket portion to the inside of the acoustic cylinder T. The cooler 72 cools the working fluid in a form in which the fins are cooled by hot water W passing through the jacket portion and cold heat is conducted from the fins to the working fluid inside the acoustic cylinder T.

The first regenerator 73 provided between the heater 71 and the cooler 72 is, for example, in the direction of the cylinder axis in a state where the plate surface is aligned in the direction orthogonal to the cylinder axis direction of the acoustic cylinder T. It is composed of a plurality of thin plate-shaped members (not shown) arranged along the line.
The thin plate-shaped member is provided, for example, with a thickness of 50 μm or more and 100 μm or less, and about 300 to 600 sheets. The thin plate-shaped member is provided with a large number of through holes (not shown) penetrating in the direction along the axial direction of the cylinder, having a diameter of about 200 μm to 300 μm.

The working fluid exists inside the acoustic cylinder T in a state of causing minute fluctuations in the direction of the axis of the cylinder. In other words, the sound wave propagating in the working fluid forms a traveling wave from one side to the other side and a traveling wave from the other side to one side between both the heater 71 and the cooler 72.
The sound wave propagating in the working fluid passes through a plurality of through holes of the thin plate-shaped member as the first regenerator 73 in the vicinity of the heater 71 when forming a traveling wave from the cooler 72 to the side of the heater 71. Occasionally, it comes into contact with the inner wall of the through hole and is heated, and at the same time, it is directly heated by the fins of the heater 71 to expand. On the other hand, when the sound wave propagating in the working fluid forms a traveling wave from the heater 71 to the cooler 72 side, a plurality of through holes of the thin plate-shaped member as the first regenerator 73 in the vicinity of the cooler 72. When it passes through, it comes into contact with the inner wall of the through hole and is cooled, and at the same time, it is directly cooled by the fins of the cooler 72 to shrink.
As a result, the sound wave as a traveling wave causes self-excited vibration, and the thermal energy is converted into the acoustic energy of the sound wave in the form in which the acoustic energy is amplified.

The working medium can be composed of a gas propagating sound waves. Here, since it is desirable that the heat exchange in the first regenerator 73 is performed quickly, helium and hydrogen having a high thermal diffusivity are desirable as the working medium. Further, for the purpose of power generation, a gas having a high molecular weight is desirable, so a gas such as argon may be mixed. Since it is thermally stable, helium is used as the working medium in the embodiment.

The acoustic energy of the sound wave amplified by the prime mover 70 propagates from the first loop tube T1 of the acoustic tube T to the acoustic heat pump section 80 of the second loop tube T2.
The acoustic heat pump unit 80 is compressed and compressed in a form in which sound waves consume acoustic energy between the endothermic 81 in which the working medium absorbs heat from the outside, the radiator 82 in which the working medium dissipates heat to the outside, and the heat absorber 81 and the radiator 82. It consists of a second regenerator 83 that expands.

Although detailed illustration is omitted, the heat absorber 81 includes a jacket portion (not shown) through which the refrigerant C circulating in the refrigerant circulation path L3 passes, and fins (not shown) extending from the jacket portion to the inside of the acoustic cylinder T. It consists of. In the heat absorber 81, the fins absorb heat from the refrigerant C flowing through the jacket portion, and the operating medium inside the acoustic cylinder T absorbs heat from the fins.
Here, the refrigerant circulation path L3 is in a form in which the refrigerant C is pumped by the second pump P2, and the refrigerant is transferred between the heat absorber 81 and the cold heat utilization unit 30 in which the cold heat possessed by the refrigerant C is dissipated and used. It circulates.

The radiator 82 includes a jacket portion (not shown) through which the hot water W of the hot water passage path L2 passes, and fins (not shown) extending from the jacket portion to the inside of the acoustic cylinder T. In the radiator 82, the working medium inside the acoustic cylinder T dissipates heat to the fins, and the dissipated heat is dissipated to the hot water W passing through the jacket portion, and the hot water W is preheated.
Incidentally, the hot water passage path L2 is arranged so as to supply the hot water W to the boiler drum 10a after passing the hot water W through the radiator 82 and the cooler 72 in the order described.

Here, the acoustic heat pump unit 80 compresses the sound waves propagating in the working fluid when forming a traveling wave from the heat absorber 81 to the heat absorber 82 side, and the sound wave propagating from the radiator 82 to the heat absorber 81 side. The heat absorber 81, the second regenerator 83, and the radiator 82 are arranged at appropriate positions in the acoustic cylinder T so as to expand when forming the above.
As a result, when the sound waves propagating in the working fluid form a traveling wave from the heat absorber 81 to the side of the radiator 82, the second regenerator 83 absorbs heat while compressing the temperature, and the radiator 82 raises the temperature. It dissipates heat when it is hot. As a result, in the radiator 82, the hot water W passing through the jacket portion is preheated in a form of exchanging heat with the working medium having a temperature higher than that of the refrigerant C flowing through the jacket portion of the heat absorber 81.
On the other hand, when the sound wave propagating in the working fluid forms a traveling wave from the radiator 82 to the endothermic 81 side, the second regenerator 83 dissipates heat while expanding and lowers the temperature, and the endothermic 81 lowers the temperature. It absorbs heat in the state of being in a state of being. As a result, in the heat absorber 81, the refrigerant C flowing through the jacket portion cools down in a form of being absorbed by the working medium that has become sufficiently low in temperature.
Incidentally, as described above, in the step of absorbing heat while compressing by the second regenerator 83 and the step of radiating heat while expanding, the acoustic energy of the sound wave is consumed and the sound wave is attenuated, but the acoustic energy is transferred from the prime mover 70. Since the energy is sequentially replenished, the heat pump function of the acoustic heat pump unit 80 is maintained.

The shape and material of the second regenerator 83 provided between the heat absorber 81 and the radiator 82 are the same as those of the first regenerator 73.
The cylinder diameter, cylinder length, shape, etc. of the acoustic cylinder T are converted from the thermal energy of the prime mover 70 to acoustic energy, particularly based on the hole diameters of the through holes of the first regenerator 73 and the second regenerator 83. The efficiency and the conversion efficiency of the acoustic energy of the acoustic heat pump unit 80 from the acoustic energy to the thermal energy are appropriately set so as to be high.

By the way, in the embodiment, the first flow rate adjusting valve that adjusts the flow rate of the blow water B flowing through the blow water flow path L1 so that the prime mover 70 continuously generates acoustic energy over time. The opening degree of V1 is adjusted to an opening degree capable of continuously supplying blow water B to the heater 71, and further, the opening of the second flow rate adjusting valve V2 for adjusting the flow rate of the hot water W flowing through the hot water flow path L2. The degree is adjusted so that the hot water W can be continuously supplied to the cooler 72.
Further, the amount of heat radiated from the blow water B by the heater 71 is substantially equal to the amount of heat absorbed by the hot water W by the cooler 72 in a predetermined unit time (for example, a time of several seconds). It is preferable that the flow rate of the blow water B and the flow rate of the hot water W are controlled.
The valve opening degree of the first flow rate adjusting valve V1 and the second flow rate adjusting valve V2 may be adjusted by human operation, or may be adjusted by a control command by a control device (not shown). May be adopted.

Next, a simulation result in which the amount of cold heat that can be supplied to the cold heat utilization unit 30 in the steam generator 100 according to the embodiment is calculated will be described.
As the estimation conditions of the simulation, the operating medium is helium, the internal pressure of the acoustic cylinder T is 0.95 MPa, the heat sound conversion efficiency of the prime mover 70 is 30% of the Carnot efficiency, and the sound heat conversion efficiency of the acoustic heat pump unit 80. Was set to 5.4%, and the loss in heat exchange and the loss of acoustic energy were not considered. Further, the blow water B was discharged at 300 kg / h, the inlet temperature in the heater 71 was 200 ° C., the outlet temperature was 60 ° C., and the amount of heat dissipated in the heater 71 was 50 kW. The hot water W is supplied at 1000 kg / h, the inlet temperature at the radiator 82 is 20 ° C., the outlet temperature is 37 ° C., the heat absorption amount of the hot water W at the radiator 82 is 20 kW, and the inlet temperature at the cooler 72 is 37. The temperature was 78 ° C., the outlet temperature was 78 ° C., the amount of heat absorbed by the hot water W in the cooler 72 was 47 kW, and the hot water W was supplied to the boiler drum 10a at 1000 kg / h at 78 ° C.
As a result, when water is used as the refrigerant C, the flow rate circulating in the refrigerant circulation path L3 is 3500 kg / h, the inlet temperature in the heat absorber 81 is 17 ° C., the outlet temperature is 13 ° C., and the refrigerant C in the heat absorber 81. It was estimated that the heat dissipation amount of the refrigerant C could be 17 kW, and similarly, the endothermic amount of the refrigerant C in the cold heat utilization unit 30 could be 17 kW.

[Another Embodiment]
(1) As shown in FIG. 2, the steam generator 100 according to the present application may be configured to allow the combustion exhaust gas E to flow to the heater 71.
In this configuration, the exhaust gas flow path L4 is provided in a state of passing the combustion exhaust gas E in the order described in the heat transfer coil EX1, the heater 71, and the second heat exchanger EX2 of the boiler 10.
That is, in the above configuration, in the heater 71, the operating medium is heated by both the exhaust heat of the combustion exhaust gas E and the exhaust heat of the blow water of the boiler 10.

Further, in the above embodiment, a configuration example is shown in which the valve opening degree of the first flow rate adjusting valve V1 is adjusted to a valve opening degree capable of continuously supplying blow water to the heater 71.
However, for example, as described above, in the case of adopting a configuration in which the exhaust heat supply medium such as the combustion exhaust gas E flows through the heater 71, the exhaust gas E always supplies the exhaust heat to the heater 71. Therefore, the valve opening degree of the first flow rate adjusting valve V1 may be adjusted to an opening degree that intermittently supplies blow water to the heater 71. In other words, the first flow rate adjusting valve V1 may be controlled by switching between an open state and a closed state at predetermined time intervals.

(2) As shown in FIG. 3, the steam generator 100 according to the present application may adopt a configuration including a power generator 40 that generates electric power from vibration of sound waves.
To add an explanation, as shown in FIG. 3, a pair of power generators 40 are provided inside a cylinder of the second loop tube T2 of the acoustic cylinder T, sandwiching a rotor blade 40c and the rotary blade 40c. The fixed wings 40a and 40b of the above are provided. In this configuration, the rotary wing 40c exerts a rotational force by both a sound wave swiveled by one fixed wing 40a and directed toward the rotary wing 40c and a sound wave swiveled by the other fixed wing 40b and directed toward the rotary wing 40c. The pair of fixed wings 40a and 40b are provided so that the rotational directions of the rotational forces applied to the rotary wings 40c by the sound waves swirled by both are the same.
Further, the rotary blade 40c is provided with a rotor (not shown) as an induction generator, and the outside of the acoustic cylinder T is provided at a portion where the rotary blade 40c is provided in the direction of the axial center of the acoustic cylinder T. A stator 40d as an induction generator is provided in the diameter portion, and the rotor rotates together with the rotor 40c to generate an induced electromotive force e in the coil as the stator 40d.
By adopting this configuration, the vibration energy of the sound wave generated inside the acoustic cylinder T is converted into electrical energy.

(3) In the above embodiment, a configuration example including an engine as a heat source is shown, but the heat source may be other than the engine.
For example, a configuration may be adopted in which the heat source is the exhaust heat of a factory and the boiler 10 heats hot water with a heat medium having the exhaust heat from the factory.
Further, for example, a configuration including a combustion device that directly heats the inside of the boiler drum 10a of the boiler 10 may be adopted as the heat source.

(4) In the above embodiment, a configuration example is shown in which the hot water W is supplied to the boiler drum 10a only through the hot water flow path L2.
However, a configuration having an auxiliary hot water flow path (not shown) in addition to the hot water flow path L2 may be adopted.
By adopting this configuration, the total amount of hot water supplied by both the hot water flow path L2 and the auxiliary hot water flow path is controlled in a form that follows the amount of steam generated in the boiler 10, and the hot water is controlled. Regarding the amount of hot water flowing through the flow path L2, the prime mover 70 can control the amount of hot water that can supply a cold heat amount that is substantially equal to the amount of heat supplied by the blow water.

(5) In the above embodiment, the acoustic tube T is configured to connect the first loop tube T1 and the second loop tube T2 with a connecting tube, but is separately composed of a single loop tube. It doesn't matter. That is, a configuration may be adopted in which both the prime mover 70 and the acoustic heat pump unit 80 are provided for the acoustic cylinder T composed of a single loop tube.
Further, the thermoacoustic engine of the present application also includes a configuration in which a plurality of acoustic cylinders T having a prime mover 70 and an acoustic heat pump unit 80 are provided.
Further, it also includes a configuration in which a plurality of prime movers 70, an acoustic heat pump unit 80, and a power generator 40 are provided for one acoustic cylinder T.

(6) In the above embodiment, as the boiler 10, an exhaust gas boiler is shown as a configuration example, but a boiler such as a recirculation boiler can also be suitably applied.

The configuration disclosed in the above embodiment (including another embodiment, the same shall apply hereinafter) can be applied in combination with the configuration disclosed in other embodiments as long as there is no contradiction. The embodiments disclosed in the present specification are examples, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

The steam generator of the present invention has a relatively simple configuration with high maintainability, and can satisfactorily recover thermal energy as exhaust heat from the boiler, and the recovered thermal energy is suitable for energy in demand such as cold energy. It can be effectively used as a steam generator that can be converted into energy.

10: Boiler 30: Cold heat utilization unit 40: Power generator 70: Motor 71: Heater 72: Cooler 73: First regenerator 80: Acoustic heat pump unit 81: Heat absorber 82: Dissipator 83: Second regenerator 90 : Thermo-acoustic engine 100: Steam generator B: Blow water C: Refrigerant E: Combustion exhaust gas EX1: Heat transfer coil L1: Blow water flow path L2: Hot water flow path L3: Refrigerant circulation path St: Steam T: Acoustic cylinder V1: First flow control valve V2: Second flow control valve W: Hot water

Claims (6)

It is a steam generator equipped with a boiler that can store hot water supplied from the outside and heats the hot water inside by the heat generated by the heat source to generate steam.
The acoustic energy of sound waves between a heater that heats the working medium from the outside, a cooler that cools the working medium from the outside, and the heater and the cooler in an acoustic cylinder filled with the working medium and propagating sound waves. A heat absorber in which the working medium absorbs heat from the outside, a radiator in which the working medium dissipates heat to the outside, a heat absorber, and the radiator, while having at least one prime mover including a first regenerator for amplifying the above. A thermoacoustic engine having at least one acoustic heat pump unit comprising a second regenerator that compresses and expands in a manner in which sound waves consume acoustic energy between them.
A blow water flow path that allows blow water from the boiler to flow through the heater, and
A hot water flow path that leads hot water to the boiler after flowing it through the cooler,
It is provided with a refrigerant circulation path for circulating the refrigerant between the heat absorber and the cold heat utilization unit in which the cold heat possessed by the refrigerant is dissipated and used .
The hot water flow path is a steam generator that allows hot water to flow through the radiator and the cooler in the order described, and then guides the hot water to the boiler.
Steam generator. The boiler is provided with a heat transfer portion inside which a heat medium that retains the heat generated by the heat source can flow.
The steam generator according to claim 1, further comprising a heat medium passage flow path through which the heat medium flows in the order described in the heat transfer unit and the heater. A first flow rate adjusting valve for adjusting the flow rate of blow water flowing through the blow water flow path is provided.
The valve opening degree of the first flow rate adjusting valve is adjusted to an opening degree capable of continuously supplying blow water to the heater.
A second flow rate adjusting valve for adjusting the flow rate of hot water flowing through the hot water flow path is provided.
The steam generator according to claim 1 or 2, wherein the opening degree of the second flow rate adjusting valve is adjusted to an opening degree capable of continuously supplying hot water to the radiator. A first flow rate adjusting valve for adjusting the flow rate of blow water flowing through the blow water flow path is provided.
The steam generator according to claim 2, wherein the valve opening degree of the first flow rate adjusting valve is controlled by switching between an open state and a closed state at predetermined time intervals in order to intermittently supply blow water to the heater. It is a steam generator equipped with a boiler that can store hot water supplied from the outside and heats the hot water inside by the heat generated by the heat source to generate steam.
The acoustic energy of sound waves between a heater that heats the working medium from the outside, a cooler that cools the working medium from the outside, and the heater and the cooler in an acoustic cylinder filled with the working medium and propagating sound waves. A heat absorber in which the working medium absorbs heat from the outside, a radiator in which the working medium dissipates heat to the outside, a heat absorber, and the radiator, while having at least one prime mover including a first regenerator for amplifying the above. A thermoacoustic engine having at least one acoustic heat pump unit comprising a second regenerator that compresses and expands in a manner in which sound waves consume acoustic energy between them.
A blow water flow path that allows blow water from the boiler to flow through the heater, and
A hot water flow path that leads hot water to the boiler after flowing it through the cooler,
It is provided with a refrigerant circulation path for circulating the refrigerant between the heat absorber and the cold heat utilization unit in which the cold heat possessed by the refrigerant is dissipated and used.
The boiler is provided with a heat transfer portion inside which a heat medium that retains the heat generated by the heat source can flow.
A heat transfer channel for passing a heat medium in the order described in the heat transfer unit and the heater is provided.
A first flow rate adjusting valve for adjusting the flow rate of blow water flowing through the blow water flow path is provided.
The valve opening degree of the first flow rate adjusting valve is a steam generator in which the open state and the closed state are switched and controlled at predetermined time intervals in order to intermittently supply blow water to the heater. The steam generator according to any one of claims 1 to 5, further comprising a power generator that generates electric power from vibration of sound waves.

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