JP2002138851A - Digester gas power generating facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide digester gas power generating facilities having compact construction without increasing the frequency of maintaining and inspecting an engine and replacing a catalyst and requiring low-cost design and maintenance. SOLUTION: The digester gas power generating facilities using a sewage sludge digester gas as a fuel for power generation comprises a packaged body unit 201 capable of on-vehicle delivery, the body unit having a digester gas refining unit 103 for removing a siloxane compound contained in the digester gas, a gas engine 101 using the digester gas supplied through the refining unit for power generation and a generator 102 utilizing the rotor driving force of the gas engine for power generation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digestion gas power generation facility for generating power using digestion gas generated from a digestion process of sewage sludge.

[0002]

2. Description of the Related Art In recent years, reduction of CO ₂ has been promoted as one of the measures against global warming. For example, in a sewage treatment plant, a power generation facility is installed and self-supplied / purchased for energy efficiency. Increasingly, there is an increasing number of cases of achieving efficient use and reducing CO ₂ emissions.

That is, in a sewage treatment facility, accumulated sewage is concentrated to obtain sludge containing various organic substances, which are anaerobically digested by the action of microorganisms. The mainstream is a system in which combustible gas (digestion gas) mainly composed of methane obtained in this process is supplied to power generation equipment such as a gas engine and a gas turbine to obtain electric power.

[0004] However, with the increase in the diffusion rate of sewers and changes in lifestyles, consumption of hair finishing agents such as shampoos and rinses, and water repellents such as car wax increases.
A large amount of siloxane compounds contained therein have flowed down into sewage.

[0005] The siloxane compound refers to a compound having a chain or cyclic structure having a siloxane bond (Si-O-Si) as a basic skeleton. As the chain compound, for example,
Examples include methoxytrimethylsilane, dimethoxydimethylsilane, hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, and dodecamethylpentasiloxane, and examples of the cyclic compound include hexamethylcyclotrisiloxane (D3
Isomer), octamethylcyclotetrasiloxane (D4
Isomer), decamethylcyclopentasiloxane (D5 isomer),
And dodecamethylcyclohexasiloxane (D6 form)
And the like. The compounds listed here have a functional group in the compound composed of a methyl group, but a compound substituted with a hydrocarbon group similar to a methyl group or a compound substituted with fluorine, chlorine, or the like instead of hydrogen is also included. In addition, there is a polypolymer compound having a large molecular weight.

The siloxane compound is present in the sewage in a form adsorbed on the sludge because most of the siloxane compound is insoluble in water, but volatilizes to the digestion gas side in a subsequent digestion process.
That is, the siloxane compound was present together with methane, which is a fuel gas for power generation, and flowed into the subsequent gas engine. The siloxane compound flowing into the gas engine becomes silica (SiO ₂ ) in a combustion chamber in the engine and adheres and precipitates on a cylinder head and other parts in the engine. As a result, there has been a problem that the engine is worn or deteriorated.

[0007] Further, the engine exhaust gas which has passed through a power generation facility such as a gas engine is subjected to, for example, nitrogen oxide treatment.
The waste gas is introduced into the denitration catalyst tower and treated. Since silica (SiO ₂ ) is contained in the exhaust gas, powdery silica (SiO ₂ ) in the exhaust gas precipitates on the surface of the catalyst. Since the powdery silica covers the surface of the catalyst in this way, and a part of the silica penetrates into the inside of the catalyst, there has been a problem that the catalytic activity is deteriorated and the desired removal of nitrogen oxides cannot be achieved.

Conventionally, without implementing effective means for directly avoiding the problems caused by the above-mentioned siloxane compounds, it is necessary to separately increase the frequency of maintenance and inspection of the engine and the frequency of replacement of the denitration catalyst. That is the current situation.

In addition, as a single device or an accessory device relating to the digestion gas power generation equipment in the sewage treatment plant, for example, a gas engine, a generator, an exhaust gas heat exchanger, a hot water heat exchanger, a three-way catalyst, a silencer, an intake / exhaust duct, Various piping, measuring equipment,
And control equipment. Conventionally, when installing such equipment, separate design drawings were created, and separate installation work was performed for each individual equipment at dispersed locations on the site of the sewage treatment plant.

[0010]

As described above, a digestion gas containing a siloxane compound generated from a digestion process in a sewage treatment plant converts silica (SiO ₂ ) in the engine during a combustion process in a subsequent gas engine. This causes wear and deterioration of each part of the engine. Further, even in the latter stage of the denitration catalyst, there was a problem that silica (SiO ₂ ) covered the catalyst surface and deteriorated the denitration performance.

For this reason, there has been a problem that the frequency of maintenance and inspection of the engine and the frequency of replacement of the catalyst are undesirably increased, resulting in a problem that the maintenance and inspection costs become enormous.

[0012] In addition, as described above, the single equipment and the auxiliary equipment related to the digestion gas power generation equipment in the sewage treatment plant are as follows.
In many conventional devices, design drawings are separately prepared, and installation work is separately performed for individual devices in dispersed locations on the premises. Therefore, it is not possible to sufficiently reduce the size of the entire equipment. Moreover, the construction process and the command system become complicated, and various costs such as labor costs, transportation costs, and the like required for each of design, equipment loading, construction work, and the like have been enormous. In other words, there has been a problem that the initial cost of the digestion gas power generation equipment becomes enormous. For this reason, existing sewage treatment facilities sometimes have to give up ordering power generation equipment, and this is one of the contributions to global environmental conservation.
_{2 In} some cases, reduction and efficient use of energy were not promoted.

It is an object of the present invention to provide a digestion gas power generation facility that can be made compact without increasing the frequency of maintenance and inspection of the engine and the frequency of catalyst replacement, and can be designed and maintained at low cost. And

[0014]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to a digestion gas power generation facility for generating electricity using sewage sludge digestion gas as fuel, from a packaged main unit that can be delivered on a vehicle. The main unit uses a digestion gas purifier that removes a siloxane compound contained in the digestion gas, a gas engine that supplies power using the digestion gas that has passed through the purification device as fuel, and a rotor driving force of the gas engine. And a generator for generating electric power by digestion.

As described above, since a series of devices related to the digestion gas power generation equipment is configured as a packaged unit that can be delivered on a vehicle, the problem that the construction cost and the equipment cost have conventionally been undesirably large is solved. Can be overcome. Further, the power generation equipment can be made compact, and the initial cost can be significantly reduced.

Also, since the digestion gas purifying apparatus for removing the siloxane compound contained in the digestion gas is installed before the digestion gas is introduced into the gas engine, the siloxane gas generation equipment such as a gas engine and the denitration equipment at the subsequent stage may be used. There is no precipitation of silica (SiO ₂ ) derived from the compound. For this reason, it is possible to avoid the wear and deterioration of the engine parts as in the related art. Further, the problem of deterioration of the denitration catalyst tower catalyst can be avoided beforehand because the siloxane compound in the gas has been removed. As a result, the frequency of maintenance and inspection of power generation equipment and
It is possible to significantly reduce it.

In other words, the digestion gas power generation equipment of the present invention is configured as a packaged unit that is provided with a digestion gas purification device and can be delivered on a vehicle. Frequency of maintenance and inspection and replacement of the catalyst can be reduced, and as a result, running costs can be reduced.
Further, initial costs for construction costs and equipment costs can be reduced.

The digestion gas purifying apparatus in the above-mentioned main unit includes a dehumidification cooler for cooling the digestion gas to condense and separate water contained in the digestion gas; And a packed bed filled with a porous adsorbent for adsorbing and removing the siloxane compound contained in this gas by contacting the gas.

By configuring the digestion gas purifying apparatus in this way, excess water and siloxane compounds contained in the digestion gas can be efficiently removed, so that a digestion gas suitable as a fuel for a gas engine can be obtained. It becomes possible. Therefore, the frequency of maintenance and inspection of the gas engine and the subsequent denitration device and the frequency of catalyst replacement can be reduced. Thus, a compact and low initial cost digestion gas power generation facility can be obtained.

The digestion gas purifying apparatus in the main unit includes a gas filter for removing soot and dust contained in the digestion gas, a mist separator for removing mist contained in the digestion gas, and a hydrogen sulfide contained in the digestion gas. At least one selected from the group consisting of a dry desulfurization device that removes gas, a gas booster that pressurizes the digestion gas and introduces it into the gas engine, and a gas heater that raises the temperature of the digestion gas to a temperature suitable for the gas engine. It is preferable to further include

By adding various devices to the digestion gas purifying apparatus in this manner, a digestion gas suitable for a gas engine can be obtained. If a gas filter is added in front of the dehumidifying cooler, the soot and dust contained in the digestion gas can be removed, and the problem of introducing soot and dust in a subsequent process can be avoided. On the other hand, when the gas filter is installed after the packed bed, it is possible to avoid the problem that the finely divided porous adsorbent which may be generated from the packed bed flows out to the gas engine at the subsequent stage.

If the mist separator is added before the dehumidifying cooler, the mist contained in the digested gas can be roughly removed, so that the load on the dehumidifying cooler can be reduced. If it is additionally provided after the above, moisture which may not be completely removed by the dehumidifying cooler can be removed. Further, if a gas booster is additionally provided, even when the pressure in the digestion gas tank as the supply source is small and the digestion gas cannot be sent to the gas engine, the gas can be sent by the pressurizing action of the gas booster.

[0023] By additionally installed a dry desulfurization apparatus, the hydrogen sulfide remaining is removed during digestion gas can be a suitable digestion gas to the gas engine, further, the SO _x concentration in the gas engine exhaust Note It can greatly reduce pollution and contribute to pollution prevention. If a dry desulfurization unit is installed before the packed bed,
Along with such an action, it is possible to avoid the possibility that hydrogen sulfide is adsorbed on the porous adsorbent in the packed bed and the life (breakthrough time) of the adsorbent is reduced.

If the gas heater is installed after the dehumidifying cooler, the digestive gas cooled by the dehumidifying cooler can be heated to a temperature suitable for a gas engine to reduce the relative humidity.

In the digestion gas power generation equipment according to the present invention, the main unit is a heat exchanger for exchanging heat with jacket water circulated in the gas engine, and an exhaust gas heat exchanger for exchanging heat with exhaust gas of the gas engine. A heat exchanger including a hot-water heat exchanger for supplying heat water to the outside by exchanging heat with cold water, and a heat exchanger including a heat-dissipating heat exchanger for adjusting the amount of heat exchange of these heat exchangers, and silencing exhaust gas of the gas engine. And a muffler.

As described above, hot water is supplied to the outside by effectively exchanging sensible heat obtained in the combustion process of the gas engine and not recoverable by the generator, so that energy saving can be achieved, and the exhaust gas silencer (silencer) can be achieved. ) Can reduce noise. In addition, by providing such a device in a packaged main unit, a compact and low initial cost digestion gas power generation facility can be obtained.

Alternatively, the digestion gas power generation equipment of the present invention
In addition to the main unit, further provided is a separately provided auxiliary unit that can be delivered on a vehicle,
The auxiliary unit is a heat exchanger that exchanges heat with jacket water circulated in the gas engine, an exhaust gas heat exchanger that exchanges heat with exhaust gas of the gas engine, and supplies hot water to the outside by exchanging heat with cold water. A heat exchanger including a hot water heat exchanger for performing heat exchange and a heat exchanger for heat radiation for adjusting a heat exchange amount of the heat exchanger, and a muffler for silencing exhaust gas of the gas engine can be included.

As described above, a series of devices including various heat exchangers and an exhaust gas muffler are formed as a packaged auxiliary unit separately provided from the main unit.
The following effects can be obtained. For example, when the site is limited, the main unit and the auxiliary unit can be arbitrarily devised and installed on the site. Alternatively, in the case where the power generation scale is large and the entire equipment becomes large and it is difficult to deliver the package as a package, it is divided into a main unit and an auxiliary unit, thereby reducing the size of the vehicle. Handover is possible. In addition, energy saving and noise reduction can be achieved, and a compact and low initial cost digestion gas power generation facility can be obtained.

In the digestion gas power generation facility of the present invention, it is preferable that the main unit further includes a denitration catalyst device for removing nitrogen oxides contained in exhaust gas from the gas engine.

As described above, by additionally installing the denitration catalyst device in the packaged main unit, it is possible to reduce nitrogen oxides contained in the exhaust gas of the gas engine, thereby preventing pollution, and at the same time, to reduce the size of the exhaust gas. Thus, a low initial cost digestive gas power generation facility can be obtained.

Further, in the digestion gas power generation equipment of the present invention, the main unit is of an outside air blocking type substantially entirely covered by an enclosure, and the air intake for ventilation, temperature control and silencing inside the main unit is provided. Preferably, a duct and an exhaust duct are provided near the top of the main unit.

When the enclosure and the intake / exhaust duct are installed as described above, even when the package is installed indoors, the noise of the gas engine hardly leaks to the outside. Therefore, low noise can be achieved, ventilation and temperature control inside the package can be performed, and at the same time, a compact and low initial cost digestion gas power generation facility can be obtained.

Further, the main unit may include a control panel therein.

By arranging various control panels centrally on the side of the packaged main unit, it is possible to centrally manage various controls and various instrumentation, and at the same time, to provide a compact and low initial cost digestion gas power generation. Equipment is obtained.

Further, the gas engine in the main unit can be replaced by a gas turbine.

By installing a gas turbine as required in place of the gas engine, it is possible to cope with various power generation scales and other operating conditions, and at the same time obtain a compact and low initial cost digestion gas power generation facility.

The main unit has a width of 7000 mm,
It preferably has dimensions in the range of 3000 mm in depth and 4000 mm in height.

If the dimensions of the packaged main unit are specified in this manner, for example, when the product is loaded on a low-bed trailer with a loading capacity of 30 tons, the height limit is cleared and the product can be transported for general use. Thus, it is possible to obtain a compact and low-initial-cost digestion gas power generation facility that is surely easy to handle.

The present invention also relates to a digestion gas purification unit comprising a digestion gas purification device for removing siloxane compounds contained in digestion gas, in a digestion gas power generation facility for generating electricity using sewage sludge digestion gas as fuel. A gas engine that uses the digested gas that has passed through the gas purification device as a fuel for power generation, and a power generation unit that includes a generator that generates power using a rotor driving force of the gas engine, wherein the digestion gas purification unit and the power generation unit are And a digestive gas power generation facility characterized in that each is packaged so that it can be delivered on a vehicle.

As described above, since a series of devices related to the digestion gas power generation equipment is divided into a digestion gas purification unit and a power generation unit and configured as packages that can be delivered on a vehicle, conventionally, construction costs and equipment costs are low. It is possible to overcome the problem that has been desired. In addition, the power generation equipment can be made compact, and the initial cost can be significantly reduced. In addition, since the unit is divided into two parts, for example, if there is a restriction on the site, it is possible to devise the arrangement position and install it. In the case where it is difficult to deliver the vehicle, it is possible to obtain an advantage that the size is reduced by dividing into two, and the vehicle can be easily delivered.

Further, since the digestion gas purification unit including the digestion gas purification device for removing the siloxane compound contained in the digestion gas is installed before the digestion gas is introduced into the gas engine, power generation by the gas engine or the like at the subsequent stage is performed. Siloxane compound-derived silica (Si
O ₂ ) does not precipitate. For this reason, it is possible to avoid the wear and deterioration of the engine parts as in the related art. Further, the problem of deterioration of the denitration catalyst tower catalyst can be avoided beforehand because the siloxane compound in the gas has been removed. As a result, the frequency of maintenance and inspection of the power generation equipment and the frequency of replacement of the catalyst in the denitration catalyst tower can be significantly reduced.

In other words, the digestion gas purification unit and the power generation unit are divided into a package that can be delivered on the vehicle, so that the siloxane compound is prevented from leaking out, the maintenance frequency of the gas engine and the denitration device and the catalyst are reduced. The frequency of replacement can be reduced, and as a result, running costs can be reduced. Further, initial costs for construction costs and equipment costs can be reduced.

The digestion gas purifying apparatus in the digestion gas purification unit includes a dehumidification cooler for cooling the digestion gas and condensing and separating water contained in the gas, and bringing the digestion gas into contact with a porous adsorbent. It is preferable to include a packed layer filled with a porous adsorbent for adsorbing and removing the siloxane compound contained in the leverage gas.

By configuring the digestion gas purification apparatus in this manner, excess water and siloxane compounds contained in the digestion gas can be efficiently removed, and a digestion gas suitable as a fuel for a gas engine can be obtained. Becomes Therefore, the frequency of maintenance and inspection of the gas engine and the subsequent denitration device and the frequency of catalyst replacement can be reduced.
Thus, a compact and low initial cost digestion gas power generation facility can be obtained.

Further, the digestion gas purifying apparatus in the digestion gas purification unit includes a gas filter for removing soot and dust contained in the digestion gas, a mist separator for removing mist contained in the digestion gas, and a gas filter for removing the mist contained in the digestion gas. A dry desulfurization device that removes hydrogen sulfide, a gas booster that pressurizes the digestion gas and introduces the gas into the gas engine;
Further, it is preferable to further include at least one selected from a gas heater that raises the digestion gas to a temperature suitable for the gas engine.

As described above, by adding various devices to the digestion gas purifying apparatus, a digestion gas suitable for a gas engine can be obtained. If a gas filter is added in front of the dehumidifying cooler, the soot and dust contained in the digestion gas can be removed, and the problem of introducing soot and dust in a subsequent process can be avoided. On the other hand, if the gas filter is installed after the packed bed, it is possible to avoid a problem that the finely divided porous adsorbent which may be generated from the packed bed flows out to the gas engine at the subsequent stage.

If the mist separator is added before the dehumidifying cooler, the mist contained in the digested gas can be roughly removed, so that the load on the dehumidifying cooler can be reduced. If it is additionally provided after the above, moisture which may not be completely removed by the dehumidifying cooler can be removed. Further, if a gas booster is additionally provided, even when the pressure in the digestion gas tank as the supply source is small and the digestion gas cannot be sent to the gas engine, the gas can be sent by the pressurizing action of the gas booster.

[0048] By additionally installed a dry desulfurization apparatus, the hydrogen sulfide remaining is removed during digestion gas can be a suitable digestion gas to the gas engine, further, the SO _x concentration in the gas engine exhaust Note It can greatly reduce pollution and contribute to pollution prevention. If a dry desulfurization unit is installed before the packed bed,
Along with such an action, it is possible to avoid the possibility that hydrogen sulfide is adsorbed on the porous adsorbent in the packed bed and the life (breakthrough time) of the adsorbent is reduced.

If the gas heater is installed after the dehumidifying cooler, the digestive gas cooled by the dehumidifying cooler can be heated to a temperature suitable for a gas engine to reduce the relative humidity.

The power generation unit is a heat exchanger for exchanging heat with jacket water circulated in the gas engine, the exhaust gas heat exchanger exchanging heat with the exhaust gas of the gas engine, and the heat exchanging heat with the cold water to the outside. A hot water heat exchanger for supplying hot water, a heat exchanger including a heat radiation heat exchanger for adjusting a heat exchange amount of these heat exchangers, and a muffler for silencing exhaust gas of the gas engine. preferable.

As described above, since sensible heat obtained in the combustion process of the gas engine and which cannot be recovered by the generator is effectively exchanged for heat and supplied to the outside, energy saving can be achieved, and the exhaust gas silencer (silencer) can be achieved. ) Can reduce noise. Also, by providing such a device in a packaged main unit,
A compact and low initial cost digestion gas power generation facility can be obtained.

Alternatively, the digestion gas power generation facility of the present invention including the digestion gas purification unit and the power generation unit further includes a separately provided auxiliary unit that can be delivered on a vehicle, and the auxiliary unit is , A heat exchanger that exchanges heat with jacket water circulated in the gas engine, and an exhaust gas heat exchanger that exchanges heat with exhaust gas of the gas engine, and a hot water heat exchanger that exchanges heat with cold water to supply hot water to the outside And a heat exchanger including a heat exchanger for heat radiation for adjusting the heat exchange amount of these heat exchangers, and a muffler for silencing exhaust gas of the gas engine.

As described above, a series of devices including various heat exchangers and an exhaust gas muffler are packaged as auxiliary units provided separately from the digestion gas purification unit and the power generation unit, so that Such effects can be obtained. For example, when the site is limited, the digestion gas purification unit, the power generation unit, and the auxiliary unit can be arbitrarily devised and installed on the site. Alternatively, if the power generation scale is large and the entire equipment becomes large and it is difficult to deliver the package as a package, it can be divided into three as described above, making it possible to reduce the size of each package on the vehicle. Become. In addition, energy saving and noise reduction can be achieved, and a compact and low initial cost digestion gas power generation facility can be obtained.

It is preferable that the power generation unit further includes a denitration catalyst device for removing nitrogen oxides contained in exhaust gas from the gas engine.

As described above, since the denitration catalyst device is additionally provided in the packaged power generation unit, it is possible to reduce nitrogen oxides contained in the exhaust gas of the gas engine to prevent pollution, and to reduce the size of the exhaust gas. A low initial cost digestive gas power generation facility can be obtained.

Further, the power generation unit is of an outside air blocking type substantially entirely covered by an enclosure, and an intake duct and an exhaust duct for ventilation, temperature control and silencing inside the power generation unit are provided at the top of the power generation unit. Preferably, it is provided in the vicinity.

Since the enclosure and the intake / exhaust duct are installed in this way, even when the package is installed indoors, the noise of the gas engine is less likely to leak to the outside. Therefore, low noise can be achieved, ventilation and temperature control inside the package can be performed, and at the same time, a compact and low initial cost digestion gas power generation facility can be obtained.

The digestion gas purification unit and the power generation unit may include a control panel.

If the various control panels are centrally installed on the side of the packaged main unit as described above, various controls and various instrumentation can be centrally managed, and at the same time, compactness and low initial cost can be achieved. A gas power plant is obtained.

In the power generation unit, the gas engine can be replaced by a gas turbine.

By installing a gas turbine as required in place of the gas engine, it is possible to cope with various power generation scales and other operating conditions, and at the same time, obtain a compact and low initial cost digestion gas power generation facility.

The digestion gas purification unit and the power generation unit each have a width of 7000 mm and a depth of 300 mm.
It preferably has dimensions within a range of 0 mm and a height of 4000 mm.

If the dimensions of the packaged digestion gas purification unit and power generation unit are specified in this manner, for example, when the load capacity is reduced to a 30-ton class low-bed trailer, the height restriction is cleared and general-purpose Thus, a compact and low initial cost digestion gas power generation facility that can be transported in a reliable manner and can be reliably handled is obtained.

[0064]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

FIG. 1 is a diagram showing an overall schematic flow when the digestion gas power generation equipment of the present invention is applied to a sewage treatment facility. In FIG. 1, details of peripheral devices are omitted for simplification of the description.

The sewage collected at the sewage treatment plant is subjected to concentration and other treatments. The sludge containing various organic substances obtained here is subjected to the action of microorganisms to generate a digestion gas generator (eg, an egg-type digester, etc.). Anaerobic digestion. The combustible gas (digestion gas) mainly composed of methane obtained in this process,
After being subjected to desulfurization treatment, mist removal treatment and the like, it is stored in the digestion gas tank 1.

The digestion gas stored in the digestion gas tank 1 contains a siloxane compound derived from sewage, for example, from 10 to 20%.
It is contained at a concentration of 0 mg / m ³ . The siloxane compound contained here means a siloxane bond (Si—O—S
A compound having a linear or cyclic structure having i) as a basic skeleton. Examples of the chain compound include methoxytrimethylsilane, dimethoxydimethylsilane, hexamethyldisiloxane, octamethyltrisiloxane, decamethyltetrasiloxane, and dodecamethylpentasiloxane, and examples of the cyclic compound include hexamethylcyclotrisiloxane. Siloxane (D3), octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), and dodecamethylcyclohexasiloxane (D6). The functional group in the siloxane compound does not need to be composed of a methyl group, and may be substituted with a hydrocarbon group similar to a methyl group. Alternatively, a siloxane compound substituted by fluorine, chlorine, or the like instead of hydrogen is included, and a polypolymer compound having a large molecular weight is also included. In particular, the present inventors have found that the cyclic structures of octamethylcyclotetrasiloxane (D4 isomer) and decamethylcyclopentasiloxane (D5 isomer) are predominantly detected.

The digestion gas stored in the digestion gas tank 1 is introduced into the digestion gas purification device 2, where the siloxane compound in the digestion gas is removed and purified. The digestion gas purification apparatus 2 can be composed of, for example, a dehumidifying cooler as described below and a packed tower filled with a porous adsorbent.

Subsequently, the purified digested gas is introduced into the communicating gas engine 3. The gas engine 3
Is an example of a power generation facility, and may be another power generation facility such as a gas turbine or a combustion boiler. A gas booster that pressurizes and introduces digestive gas into the gas engine 3 and a generator that communicates with the gas engine are not shown in the figure, but will be described in detail below. The digestion gas power generation equipment of the present invention comprises a digestion gas purification device 2, a gas engine 3, and a packaged main unit including a generator as essential components as shown in FIG. 4 inclusive.

FIG. 13 shows an overall schematic flow in the case where the conventional digestion gas power generation equipment is applied to a sewage treatment facility. As shown in the figure, in the conventional digestion gas power generation equipment, since the digestion gas purification device 2 is not installed, the digestion gas is directly introduced from the digestion gas tank 1 to the gas engine 3. For this reason, the inconvenience caused by the siloxane compound contained in the digestion gas as described above cannot be avoided. In many cases, the devices shown in the flowcharts are not packaged so that they can be delivered on a vehicle, and are separately installed for individual devices at dispersed locations on the site of the sewage treatment plant.

Hereinafter, each part constituting the digestion gas power generation equipment of the present invention will be described in detail.

FIG. 2 shows an example of the configuration of a digestion gas purifying apparatus which is one of the components of the present invention. The digestion gas purifying apparatus is constituted by the dehumidifying cooler 22 and the packed bed 20. However, related devices may be additionally provided as necessary.

In the digestion gas purification apparatus shown in the figure, a digestion gas at, for example, 40 ° C. from a digestion gas tank or the like is introduced into a dehumidification cooler 22 through a digestion gas introduction pipe 11 and a plurality of cooling pipes 15 (digestion gas Flow passage) inside,
It is discharged from the digestion gas discharge pipe 12 below the dehumidifying cooler 22.

For example, cold water of 10 ° C. or less is supplied to the dehumidifying cooler 22 through the cooling water supply pipe 16 by the cooling water supply device 17.
Water is continuously fed, filled and circulated inside. The outside of the cooling pipe 15 is configured so that cold water as a cooling medium comes into contact with the inside of the cooling pipe 15 and the digestion gas flows through the inside. In this process, the digestive gas is indirectly heat-exchanged to a temperature of about 10 ° C. or lower, and the water condenses on the inner wall of the cooling pipe 15 or the lower part of the dehumidifying cooler 22, and continuously or intermittently through the discharge pipe 18. Is discharged to the coagulation water tank 19.

In the process of cooling the digestion gas to condense water as described above, a part of the siloxane compound contained in the digestion gas is also condensed with the water, so that the digestion gas can be purified to some extent.

The dehumidifying cooler 22 is not limited to the above-described embodiment, and various types of indirect heat exchange type gas coolers can be used, and the digestive gas can be cooled to about 10 ° C. or less. Is preferred. By using cold water of 10 ° C. or less as a cooling medium for indirect cooling, for example, without using a CFC-based cooling medium that adversely affects the atmospheric environment,
Moisture can be separated from digestive gas by an inexpensive and simple method.

The digestion gas discharged from the dehumidification cooler 22 is introduced into the packed bed (main body) 20 through the digestion gas introduction pipe 13. The packed bed 20 is filled with, for example, granular activated carbon as the porous adsorbent 21. When the digestion gas passes through the packed bed 20, the siloxane compound slightly remaining in the digestion gas is adsorbed and removed by the porous adsorbent,
Digestion gas is fully purified. The digested gas purified in this way is introduced into another process device such as a gas engine via the digested gas discharge pipe 14.

A drain pipe for discharging drain (condensed water) generated when the apparatus is started up or shut down in the apparatus is provided below the packed bed 20 as necessary. Condensed water tank 19 provided below wet cooler 22
To join. However, the present invention is not limited to this, and the drain may be separately treated. If necessary, a filter (not shown) may be provided at the upper part in the apparatus in order to prevent the porous adsorbent 21 filled in the filling layer 20 from scattering.

The packed bed 20 used in the digestion gas purifying apparatus of the present invention may be of a closed type which can be filled with a porous adsorbent and circulates a gas to be treated. Not limited. The superficial velocity of the digestion gas introduced into the packed bed 20 depends on the filling amount of the porous adsorbent, but in order to obtain a sufficient contact efficiency between the gas and the adsorbent, for example, 0.5 m / s or less. It is preferable that

As the porous adsorbent to be filled in the filling layer 20, for example, the integrated capacity of pores having a specific surface area of 500 m ² / g or more and / or a pore diameter in a range of 10 ° to 20 ° is 0.1 mm. It is preferable to have a pore distribution of 1 cm ³ / g or more, but it is only necessary to have properties according to this. The material of the porous filler 21 is not particularly limited, and for example, activated carbon, zeolite, alumina, molecular sieves, and other materials can be used. Such an adsorbent is subjected to a regenerating treatment by a heat swing method by heating, a pressure swing method by depressurization, or a combination thereof as necessary, and is repeatedly used.

The dehumidifying cooler 22 and the packed bed 20 constitute a digestion gas purifying apparatus in the packaged digestion gas power generation facility of the present invention.

By using the digestion gas purifying apparatus having such a configuration, excess moisture and siloxane compounds contained in the digestion gas can be efficiently removed, and the digestion gas can be made suitable as a fuel for a gas engine. That is,
The frequency of maintenance and inspection of the gas engine and the subsequent denitration apparatus and the frequency of catalyst replacement can be reduced.

FIG. 3 shows an example of a flow in a digestion gas purification apparatus which is one of the components of the present invention.

In the example shown in FIG. 3A, a gas filter 31, a mist separator 32, a gas booster 33, a dehumidifying cooler 34, a gas heater 35, a dry desulfurizer 36, a packed bed 37, The filter 31 constitutes a digestion gas purification device. In this example, the digester gas purification device shown in FIG.
1, a mist separator 32, a gas booster 33, a gas heater 35, and a dry desulfurization device 36 are additionally provided.

The gas filter 31 used here is a filtration device filled with a filtering agent, and is a device for removing soot and dust slightly contained in digestive gas. Since such a gas filter 31 is installed on the upstream side, it is possible to avoid a problem that dust is mixed in each process in the subsequent digestion gas purifying apparatus. A gas filter 31 of an equivalent type is also provided after the packed bed 37. Thereby, it is possible to avoid a problem that the finely divided porous adsorbent which may be generated from the packed bed 37 flows out to the gas engine at the subsequent stage.

The mist separator 32 has, for example, one or more collision plates installed therein in the longitudinal direction to cause gas collision.
This is a device configured to remove mist in gas by inertia force or the like. Since such a mist separator 32 is provided on the upstream side of the dehumidifying cooler 34, the load on the dehumidifying cooler 34 can be reduced. Although not shown in FIG. 3A, the mist separator 32 can be additionally provided immediately after the dehumidifying cooler 34, and in this case, the amount of water entrained in the subsequent stage can be further reduced. It becomes possible. The mist separator 32 is not limited to the collision plate type described above, and various types of devices can be employed.

The gas booster 33 is a device that pressurizes the digestion gas and sends it to the gas engine at the subsequent stage. By installing such a gas booster 33, for example, in front of the gas cooler 34 as shown in the figure, the pressure in the digestion gas tank, which is the supply source, is too small to send the digestion gas to the gas engine. Also, gas can be sent by the pressurizing action. However, when the gas engine has a low-pressure specification or when the pressure in the digestion gas tank is sufficient, the gas booster 33 can be omitted, and may be replaced by a digestion gas pressure or flow rate regulating valve.

The dehumidifying cooler 34 is a device that cools digestion gas to condense and separate water, and is as described in FIG.

The gas heater 35 supplies digestive gas to, for example, 40
It is a device that heats to about ° C. By installing this device after the dehumidifying cooler 34, the digestion gas cooled by the dehumidifying cooler 34 is heated to a temperature (for example, 30 to 40 ° C.) suitable for the gas engine to reduce the relative humidity. Can be smaller. As the gas heater 35, for example, a type in which heat is exchanged with jacket water attached to a gas engine to heat the digestion gas is adopted, but another heating method may be used.

The dry desulfurization device 36 is a simple type of desulfurization tower device filled with a desulfurizing agent such as granular iron oxide. By installing this device, it is possible to remove hydrogen sulfide remaining in the digestion gas to make the digestion gas suitable for a gas engine. Furthermore, since significantly reduces the SO _x concentration in the gas engine exhaust gas, it is possible to contribute to pollution prevention. In addition, since the dry desulfurization device 36 is installed before the packed bed 37, hydrogen sulfide is adsorbed on the porous adsorbent in the packed bed 37, and the life of the adsorbent (breakthrough time) is reduced. The fear can be avoided beforehand.

The filling layer 37 is filled with a porous adsorbent.
It is a device that removes siloxane compounds in digestive gas,
This has already been described in the description of FIG. However, when a filter is installed on the outlet side in the packed bed, the packed bed 3
The gas filter 31 installed at the subsequent stage in 7 can be omitted.

As described above, the gas filter 31, the mist separator 32, the gas booster 33, the dehumidifying cooler 34,
By arranging the gas heater 35, the dry desulfurization device 36, the packed bed 37, and the gas filter 31, it is possible to configure a digestion gas purification device in which the effects and actions of each device are synergistically obtained.

FIG. 3B shows an example in which a dehumidifying cooler 34, a mist separator 32, and a gas booster 3 are sequentially arranged.
3 and the packed bed 37 constitute a digestion gas purification apparatus. In this example, a mist separator 32 and a gas booster 33 are additionally provided in the digestion gas purification device shown in FIG.

The operation of each device constituting the digestion gas purification apparatus here is as described with reference to FIG. In the example shown in FIG. 3B, unlike the case of FIG. 3A, the dehumidifying cooler 34 is
It is installed on the upstream side of. Therefore, the dehumidifying cooler 34
No pressure is applied to the surface, and the action of condensing water is relatively improved. Further, since the temperature rises in the process of increasing the pressure of the gas booster 33, there is also an effect that the gas heater 35 does not need to be installed. However, if precise temperature control is required,
A gas heater 35 may be provided. If the moisture can be sufficiently removed by the dehumidifying cooler 34, the mist separator 32
Can be omitted. Further, the gas filter 31 and the dry desulfurization device 36 as shown in FIG. 3A may be additionally provided as necessary.

The adoption and arrangement of each device shown in FIGS. 3A and 3B are not limited to the above-described example, but may be performed without departing from the scope of the present invention, or the operation and arrangement of each device described above. It can be changed freely within a range that does not greatly impair the operation.

As described above, various devices as illustrated in FIGS. 3A and 3B are configured as a digestion gas purifying apparatus in the packaged digestion gas power generation facility of the present invention.

When the digestion gas purifying apparatus is configured as described above, the operations of the various devices described above are synergistically obtained, and at the same time, the operations and effects of the digestion gas purifying apparatus shown in FIG. Obtained above.

FIG. 4 shows an example of the flow of an apparatus in the vicinity of a gas engine which is one of the components of the present invention.

As shown, the atmosphere as the combustion air of the gas engine 41 is introduced into the mixer 62 via the air filter 60. On the other hand, the purified digested gas 61 from the digested gas purifier 46 is also introduced into the mixer 62, where the combustion air and the digested gas as fuel are premixed. The premixed fuel (air and digestion gas) is introduced into a supercharger 63 that operates using the pressure of the engine exhaust gas 52, is pressurized, and then is introduced into an intercooler (air cooler) 64, Cooled to a temperature suitable for engine 41. Subsequently, the premixed fuel is introduced into a manifold (fuel gas header) 65 and then into a cylinder (not shown) attached to the gas engine main body 41.

In the gas engine 41, lean burn (lean burn) or stoichiometric fuel (rich burn) is performed, and the rotor 47 communicating with the generator 42 is rotated by the piston driving force generated here, thereby generating the generator. At 42, power generation is performed. On the other hand, a part of the combustion exhaust gas 52 discharged from the gas engine 41 is introduced into the supercharger as described above. Most of the remaining portion of the combustion exhaust gas 52 is introduced into a denitration catalyst device (not shown) such as a three-way catalyst device as necessary, and nitrogen oxides in the exhaust gas are removed. Next, after being introduced into an exhaust gas muffler not shown here,
Released to the atmosphere.

Note that the configuration described above is merely an example,
Various configurations similar to this are employed. For example, when the supercharger and the intercooler are installed in reverse, or in the case of a low-pressure engine, the supercharger 63 can be omitted. When performing lean combustion, a honeycomb type denitration catalyst device is employed in a low temperature region of 400 ° C. or lower, instead of the above-described three-way catalyst, if necessary. Although not shown, a lubricating oil circulation tank and a lubricating oil service tank for circulating inside the gas engine 41 are installed as necessary.

As described above, the packaged digestion gas power generation equipment of the present invention can include, in addition to the gas engine and the generator, the various attached devices shown in FIG. 4 attached thereto.

FIG. 5 shows an example of the flow of an apparatus relating to waste heat recovery which is one of the components of the present invention.

As shown in the figure, an exhaust gas heat exchanger 43, a hot water heat exchanger 44, and a heat exchanger 43, which perform heat exchange with jacket water 50 flowing through a jacket 51 in a gas engine 41, respectively.
And the heat exchangers 45 for heat radiation are each provided with a jacket water pipe 50.
Are arranged in communication with each other.

The exhaust gas heat exchanger 43 includes a gas engine 41.
Is exchanged with the high-temperature exhaust gas 52 which has been discharged from the exhaust gas and passed through a denitration catalyst device (three-way catalyst device) 53, and the exhaust gas after the heat exchange is introduced into an exhaust gas muffler 48 and thereafter discharged outside the system. The hot water heat exchanger 44 exchanges heat with cold water to generate hot water, and provides the hot water to the outside. The heat-exchanging heat exchanger 45 is a heat exchanger for adjusting the above-mentioned two heat exchange amounts, and exchanges heat with cold water of a cooling tower 49 installed outside, and as a result, releases heat (waste heat). Perform Gas engine 4
1 and the generator 42 are as described above with reference to FIG.

As described above, the packaged digestion gas power generation equipment of the present invention can include various heat exchangers for waste heat recovery illustrated in FIG. 5 and various equipment attached thereto.

The waste heat recovery apparatus according to the digestion gas power generation equipment of the present invention was connected with a jacket water pipe.
Although the exhaust gas heat exchanger, the hot water heat exchanger, and the heat exchanger for heat radiation are illustrated, some of them may be omitted. Alternatively, various configurations and devices other than such a heat exchanger can be adopted. For example, the exhaust gas heat exchanger may be a boiler heat exchanger that generates high-pressure steam, and a steam-water separation pipe that separates jacket water heated by the engine into steam to obtain low-pressure steam may be separately installed. is there.

FIG. 6 is a schematic diagram showing the configuration of an example of a digestion gas power generation facility according to the present invention for generating power using sewage sludge digestion gas as fuel. The digestion gas power generation equipment shown here comprises a packaged main unit that can be delivered on a vehicle, and the main unit includes a digestion gas purification device that removes a siloxane compound contained in the digestion gas, and a digestion gas that has passed through the purification device. A gas engine is provided for power generation using gas as fuel, and a generator is provided for generating power using a rotor driving force of the gas engine. In the figure, related devices are added as appropriate.

FIG. 6A is a schematic cross-sectional view of a packaged main unit, and FIG. 6B is a schematic front view of the main unit, and each of them generally reflects the size ratio of the actual device. Is shown. However, in these drawings, in the case where the devices are superimposed on each other and are difficult to see, the notation of the devices may be omitted. Further, piping for connecting each device, other detailed devices, and attached devices are also omitted for convenience of description.

As shown in FIG. 6, a digestion gas purification device 103 is arranged on the right side of the packaged main unit 201. The digestion gas purification device 103 has the same configuration as that shown in FIG. 3A, and includes an inlet gas filter 104, a gas booster 107,
It includes a dehumidifying cooler 105, a packed bed 106, and an outlet gas filter 104.

As already described with reference to FIGS. 2 and 3, the equipment constituting the digestion gas purification apparatus 103 includes a gas filter 31, a mist separator 32, and a gas booster 3.
3. The equipment is selected from the dehumidifying cooler 34 (22), the gas heater 35, the dry desulfurization device 36, and the packed bed 37 (20). Located inside the unit. Pressure gauges, thermometers, drain pipes, various valves, other peripheral devices, and measuring devices are appropriately arranged.

In FIG. 6, the digestion gas purifier 103
Are intensively arranged on the right side of the main unit 201, but this is not necessarily the case. For example, gas booster 1
07 is the gas engine 10 on the left side of the main unit 201.
Each device of the digestion gas purification apparatus may be distributed and installed in consideration of saving of the site in the package, for example, by arranging the equipment in an empty space in a substantially central portion where the device 1 is arranged.

A gas engine 101 for generating electricity by using the digested gas passed through the digested gas purifying device 103 as a fuel, a generator 102, related devices, and an exhaust gas heat exchanger 1 as an accessory device.
08, the lubricating oil service tank 117, the lubricating oil circulation tank 118, and these attached devices (not shown) are arranged at a substantially central portion in the packaged main unit 201. As described with reference to FIG. 4, the gas engine 101 and the generator 102 include the air filter 60, the mixer 62, the supercharger 63, the intercooler 64, the manifold 65, and the rotor shaft 47 as an example. , Various measuring devices, various valves, and various control devices.

As described with reference to FIG. 5, the exhaust gas heat exchanger 1 performs heat exchange with the jacket water 50 flowing through the jacket 51 in the gas engine 101 (41).
08 (43), the hot water heat exchanger 44, and the heat radiation heat exchanger 45, the exhaust gas heat exchanger 108 (43)
As shown in (a), it is arranged adjacent to the gas engine 101. Other heat exchangers can be installed in empty space or can be omitted in some cases.

An exhaust gas silencer 11 for silencing exhaust gas
1 is configured to be installed on the top of the packaged main unit 201 in FIG. 6 and installed outside an enclosure 120 described later. DeNOx catalyst device 5 for removing nitrogen oxides contained in engine exhaust gas
3 is installed in the engine exhaust gas line as needed, but is not shown in FIG. The hot water heat exchanger 44
Is required, a cooling tower 49 is separately required. In many cases, the cooling tower 49 is installed outside the package. Further, the piping for connecting the various devices described above, various measuring devices, and control devices can be appropriately installed.

The control panel 116 for integrally controlling and monitoring the packaged main unit 201 is composed of, for example, an instrument panel 116a, an auxiliary instrument panel 116b, and a generator panel 116c. It is arranged on the left side in the unit 201.

The above-described set of devices is installed substantially fixedly on the base plate 121. A plurality of anti-vibration devices 119 are provided between the base plate 121 and the floor to suppress the propagation of the vibration of the engine or the generator to the outside or inside the unit. If necessary, an additional vibration isolator 1 is provided between the gas engine 101 and the generator 102 and the base plate 121.
19 can be installed.

It is desirable that the packaged main unit 201 shown in FIG. 6 be substantially entirely covered with the enclosure 120 so as to be of an outside air cutoff type. In addition, it is desirable to install the intake duct 113 and the exhaust duct 114 near the top of the main unit 201 for ventilation, temperature control, and noise reduction in the packaged main unit 201.

In FIG. 6, each device of the exhaust gas muffler 111, the intake duct 113, and the exhaust duct 114 is installed outside the enclosure 120, and a set of other devices is installed inside. However, the enclosure 120 may be omitted when the apparatus is installed outdoors or when noise regulations are loose. The enclosure 120 used here is desirably formed of a sound deadening material that provides a sound deadening effect. In addition, one or more doors (not shown) are provided as appropriate so that the inside of the main unit 201 can be accessed for monitoring and maintenance and inspection of devices. It is preferable that the intake duct 113 and the exhaust duct 114 have a sound deadening effect by filling the inside thereof with a sound deadening material.

The gas engine 101 in the packaged main unit 201 can be replaced by a gas turbine (not shown). In the case where a gas turbine is used, FIGS. 6A and 6B The arrangement and configuration substantially the same as those shown in FIG. 1 are possible, and the same effects can be obtained.

It is necessary that the packaged main unit 201 of the present invention configured as described above has a size that can be delivered on a vehicle. Preferably, the width is 70
If the dimensions of the main unit are configured to be within the range of 00 mm, depth 3000 mm, and height 4000 mm,
For example, even when the vehicle is loaded on a low-bed trailer with a loading capacity of 30 ton class, traffic restrictions such as height restrictions can be cleared, and general-purpose transportation can be performed. The packaged digestion gas power generation equipment shown in FIG.
z) In the case of a power generation facility of a scale, the width is 6500 m
If it is designed to have dimensions of m, 2500 mm in depth and 3200 mm in height (in the case where a package is formed by installing the intake duct 113 on the upper part as shown in the figure), it is possible to make it possible to deliver it on a vehicle.

FIG. 7 is a schematic diagram showing the configuration of another example of a digestion gas power generation facility for generating power using sewage sludge digestion gas as fuel according to the present invention. The digestion gas power generation equipment shown here comprises a packaged main unit that can be delivered on a vehicle, and the main unit includes a digestion gas purification device that removes a siloxane compound contained in the digestion gas, and a digestion gas that has passed through the purification device. In addition to a gas engine that supplies power using gas as a fuel and a generator that generates power using the driving force of the rotor of the gas engine, a heat exchanger that exchanges heat with jacket water flowing through the gas engine is used. Exhaust gas heat exchanger that exchanges heat with exhaust gas from gas engines
A hot water heat exchanger that exchanges heat with cold water and supplies hot water to the outside,
And a heat exchanger including a heat-exchanging heat exchanger for adjusting the heat exchange amount of these heat exchangers, and a muffler for silencing exhaust gas of the gas engine. In the figure, related devices are added as appropriate. Here, FIG.
The description of the same components as those described above is omitted.

FIG. 7A is a schematic cross-sectional view of a packaged main unit, and FIG. 7B is a schematic front view of the main unit, and each of them generally reflects the size ratio of the actual device. Is shown. However, in these drawings, in the case where the devices are superimposed on each other and are difficult to see, the notation of the devices may be omitted. Further, piping for connecting each device, other detailed devices, and attached devices are also omitted for convenience of description.

As shown in FIG. 7, on the right side of the packaged main unit 201, a digestion gas purification device 103 is arranged. The digestion gas purification device 103 has the same configuration as that shown in FIG. 3A, and includes an inlet gas filter 104, a gas booster 107,
It includes a dehumidifying cooler 105, a packed bed 106, and an outlet gas filter 104. That is, since it is the same as the digestion gas purification apparatus 103 in FIG. 6, its description is omitted.

A gas engine 101 for generating electric power by using the digested gas passed through the digested gas purifying device 103 as a fuel, a generator 102, related devices, and lubricating oil service tanks 117 and lubricating oil circulation tanks 118, which are auxiliary devices, are not shown. These attached devices are arranged in a substantially left space in the packaged main unit 201. Gas engine 1
The configuration including the accessories 01 and the generator 102 is as described with reference to FIG. 6 (or FIG. 4).

As described with reference to FIG. 5, the exhaust gas heat exchanger 1 performs heat exchange with the jacket water 50 flowing through the jacket 51 in the gas engine 101 (41).
08 (43), the hot water heat exchanger 109 (44), and the heat exchanger 110 (45) for heat dissipation, and the exhaust gas muffler 111, as shown in FIG. They are arranged collectively in a space on the right side of 101. Further, the denitration catalyst device 112 (53) for removing nitrogen oxides contained in the engine exhaust gas is installed in the exhaust gas line on the upstream side of the exhaust gas heat exchanger 108 as shown in FIG. Here, in the case of the stoichiometric combustion (rich burn), the denitration catalyst device 112 can be a three-way catalyst. A type of denitration catalyst device can be installed. In addition, the piping for connecting the various devices described above, various measurement devices, and control devices can be appropriately installed.

The control panel 116 for integrally controlling and monitoring the packaged main unit 201 is composed of, for example, an instrument panel 116a, an auxiliary instrument panel 116b, and a generator panel 116c. . These are arranged adjacent to the outer left side of the main unit 201 unlike the case of FIG.

The above-described set of devices is fixed and installed substantially on the base plate 121. As in the case of the digestion gas power generation facility shown in FIG. 6, a vibration isolator 119 is installed between the base plate 121 and the floor.

In the packaged main unit 201 shown in FIG. 7, similarly to the case of FIG. 6, an enclosure 120, an intake duct 113, and an exhaust duct 114 covering almost the entirety are installed as necessary. Can be.

Further, the gas engine 101 in the packaged main unit 201 shown in FIG. 7 can be replaced by a gas turbine (not shown) as in the case of FIG.

It is necessary that the packaged main unit 201 of the present invention configured as described above has a size that can be delivered on a vehicle. Preferably, the width is 70
If the dimensions of the main unit are configured to be within the range of 00 mm, depth 3000 mm, and height 4000 mm,
For example, even when the vehicle is loaded on a low-bed trailer with a loading capacity of 30 ton class, traffic restrictions such as height restrictions can be cleared, and general-purpose transportation can be performed. The package-type digestion gas power generation equipment shown in FIG. 7 has a power of 500 kW (60 Hz).
In the case of a power generation facility of a scale, the width 7000 mm (when the control panel 116 is separately installed outside the main unit), the depth 3000 mm, and the height 3000 mm (the upper intake duct 113 and the exhaust duct 114 are outside the main unit. If it is designed to have dimensions of (when installed separately), it can be delivered on a car.

FIG. 8 is a schematic diagram showing the configuration of another example of a digestion gas power generation facility according to the present invention for generating power using sewage sludge digestion gas as fuel. The digestion gas power generation equipment shown here is a digestion gas purification device that removes a siloxane compound contained in the digestion gas, a gas engine that uses the digestion gas that has passed through the purification device as a fuel for power generation, and a rotor driving force of the gas engine. A packaged main unit 20 including a generator for generating electricity by utilizing the vehicle
In addition to the above, the vehicle further comprises a separately provided packaged accessory unit 202 which can be delivered on a vehicle, wherein the accessory unit exchanges heat with jacket water flowing through the gas engine. An exhaust gas heat exchanger that exchanges heat with exhaust gas of a gas engine, a hot water heat exchanger that exchanges heat with cold water to supply hot water to the outside, and a heat exchanger for heat radiation that adjusts the amount of heat exchange of these heat exchangers And a muffler for silencing exhaust gas of the gas engine. In the figure, related devices are added as appropriate. Here, the description of the same components as those in FIG. 6 is omitted.

FIG. 8A is a schematic sectional view of the packaged main unit and auxiliary unit.
(B) is a schematic front view of each of them, and each of them schematically reflects the size ratio of the actual device. However, in these drawings, when the devices overlap in terms of expression and are difficult to see, the notation of the devices may be omitted.
Further, piping for connecting each device, other detailed devices, and attached devices are also omitted for convenience of description.

As shown in FIG. 8, a digestion gas purifying apparatus 103 is arranged on the left side of the packaged main unit 201. The digestion gas purification device 103 has the same configuration as that shown in FIG. 3A, and includes an inlet gas filter 104, a gas booster 107,
It includes a dehumidifying cooler 105, a packed bed 106, and an outlet gas filter 104. That is, the configuration is the same as that of the digestion gas purification apparatus 103 in FIG.

A gas engine 101 for generating electric power by using the digested gas passed through the digested gas purifying device 103 as a fuel, a generator 102, related equipment, and a lubricating oil service tank 117 and a lubricating oil circulation tank 118, which are auxiliary equipment, are not shown. These attached devices are arranged in a space on the substantially right side in the packaged main unit 201. Gas engine 1
The configuration including the accessories 01 and the generator 102 is as described with reference to FIG. 6 (or FIG. 4).

As described with reference to FIG. 5, the exhaust gas heat exchanger 1 performs heat exchange with the jacket water 50 flowing through the jacket 51 in the gas engine 101 (41).
08 (43), the hot water heat exchanger 109 (44), and the heat exchanger 110 (45) for heat dissipation, and the exhaust gas muffler 111 are packaged in the main unit 20.
As shown in FIGS. 8A and 8B, a package (package accessory unit 202) that can be delivered on a vehicle separately from the package 1 is installed on the right side of the main body package 201.

The two units packaged in this way, ie, the main unit 201 and the auxiliary unit 202, can be separately delivered on a vehicle and connected on site. For example, in the device shown in FIG. 8, an engine exhaust gas duct, other instrumentation wires,
And piping are connected. In the accessory unit 202, a denitration catalyst device (three-way catalyst device) 112 can be installed in the exhaust gas line on the upstream side of the exhaust gas heat exchanger 108, if necessary, in addition to the devices described above. here,
In the case of the stoichiometric combustion (rich burn), the denitration catalyst device 112 can be a three-way catalyst, and in the case of the lean burn (lean burn), the honeycomb type denitration catalyst is used when the exhaust gas temperature is 400 ° C. or less. Equipment can be installed.
In addition, pipes for connecting the various devices described above, various measuring devices, and control devices are appropriately installed. However, it is also possible to incorporate the denitration catalyst device 112 into the main unit 201 when the denitration catalyst device is a three-way catalyst or due to the arrangement.

As shown in FIG. 8, a series of devices including various heat exchangers and an exhaust gas silencer is configured as a separately packaged auxiliary unit 202 so that, for example, when the site is limited. Can be installed by devising the arrangement. Further, in the case where the power generation scale is large and the entire equipment becomes large and it is difficult to collectively deliver the package as a package, the main unit 201 and the auxiliary unit 201 are divided into two parts, each of which is reduced in size and the car is reduced. This has the advantage that over-delivery is possible.

The control panel 116 for centrally controlling and monitoring the packaged main unit 201 and / or auxiliary unit 202 includes, for example, an instrument panel 116a,
It is composed of three parts: an auxiliary instrument panel 116b and a generator panel 116c. These are arranged adjacent to the outside left side of the main unit 201, similarly to the case of the power generation equipment shown in FIG.

The main unit 201 and the auxiliary unit 202 as described above are composed of a set of
Almost the whole is fixed and installed on. The base plate 121 and the anti-vibration device 119 are substantially the same as those in FIG. 6, but the anti-vibration device 119 installed on the floor can be omitted for the accessory unit 202.

The enclosure 120, the intake duct 113, and the exhaust duct 114 that cover substantially the entire packaged unit can be installed as needed. Here, the intake duct 113 and the exhaust duct 114
Is preferably installed in the main unit 210 as shown in FIG. In the illustrated example, the enclosure 120 is installed in both the main unit 201 and the accessory unit 202.
2 can be omitted.

Further, the gas engine 101 in the packaged main unit 201 shown in FIG. 8 can be replaced with a gas turbine (not shown) as in the case of FIG.

The packaged main unit 201 and auxiliary unit 202 of the present invention configured as described above.
Must have a size that can be delivered on a vehicle.
Desirably, width 7000mm, depth 3000mm,
If the dimensions of each package are configured so that the height is within the range of 4000 mm, for example, even when loaded on a low-bed trailer with a loading capacity of 30 ton class, traffic restrictions such as height restrictions are cleared. , And can be transported for general use. The packaged digestion gas power generation equipment shown in FIG.
In the case of an 800 kW (60 Hz) power generation facility, the width is 6000 mm (when the control panel 116 is outside the package and installed separately), the depth is 3000 mm, and the height is 30.
00 mm (intake duct 113 and exhaust duct 114
If the main body unit 201 is designed to have dimensions of (excluding the package and separately installed), it is possible to allow the vehicle to be delivered on a vehicle. The dimensions of the accessory unit 202 can be naturally set smaller than the main unit 201.

FIG. 9 shows an arrangement example (cross-sectional view) of each unit in the packaged digestion gas power generation equipment of the present invention.

FIG. 9A shows an example in which the digestion gas power generation equipment is constituted only by the packaged main unit 201, and corresponds to the constitution shown in FIG. 6 or FIG.

FIG. 9B shows that the digestion gas power generation equipment is composed of a packaged main unit 201 and an auxiliary unit 202, and the auxiliary unit 202 is located on the right side (longitudinal direction) of the main unit 201. ). This corresponds to the configuration illustrated in FIG.

FIG. 9C shows that the digestion gas power generation equipment is composed of a packaged main unit 201 and an auxiliary unit 202, and the auxiliary unit 202 is installed on the side of the main unit 201. It is an example.

As described above, various arrangements are possible in the digestion gas power generation equipment of the present invention, and the same effect can be obtained in any case.

FIG. 10 is a schematic diagram showing the configuration of another example of a digestion gas power generation facility according to the present invention for generating power using sewage sludge digestion gas as fuel. The digestion gas power generation equipment shown here is a digestion gas purification unit 2 composed of a digestion gas purification device for removing siloxane compounds contained in digestion gas.
And a power generation unit 203 including a gas engine for generating electric power by using the digested gas that has passed through the digestion gas purification device as a fuel and a generator that generates electric power by using a rotor driving force of the gas engine. The unit and the power generation unit are each packaged so that they can be delivered on a vehicle. In the figure, related devices are added as appropriate.

FIG. 10A is a schematic cross-sectional view of a packaged digestion gas purification unit and a power generation unit, and FIG. 10B is a schematic front view of the same. Is largely reflected. However, in these drawings, when the devices overlap in terms of expression and are difficult to see, the notation of the devices may be omitted. Further, piping for connecting each device, other detailed devices, and attached devices are also omitted for convenience of description.

As shown in FIG. 10, the packaged digestion gas purifying unit 204 has the same configuration as that shown in FIG.
4. Gas booster 107, dehumidifying cooler 105, packed bed 1
06, and the outlet gas filter 104 (31). In the illustrated example, the digestion gas purification unit 204 having such a configuration is installed on the right side of the power generation unit 203. As already described with reference to FIGS. 2 and 3, the equipment constituting the digestion gas purification unit 204 includes a gas filter 21, a mist separator 32, a gas booster 33, a dehumidifying cooler 34 (22), a gas heater 35, Each device is selected from the dry desulfurization device 36 and the packed bed 37 (20), the connection order is determined, connected by gas pipes, and arranged in the packaged digestion gas purification unit 204. Further, a pressure gauge, a thermometer, a drain pipe, various valves, other peripheral devices, and a measuring device can be appropriately arranged.

In FIG. 10, the packaged digestion gas purifying unit 204 is installed on the right side of the main unit 203, but the arrangement of the two units is not limited to this, and various arrangements may be made as exemplified below. Can be adopted.

In the packaged power generation unit 203, a gas engine 101 for generating electricity by using the digested gas passed through the digested gas purifying unit 204 as a fuel, and a generator 1
02 and the related equipment and attached equipment, exhaust gas heat exchanger 1
08, a lubricating oil service tank 117, a lubricating oil circulating tank 118, and their attached devices (not shown) are arranged at substantially the center. Gas engine 101 and generator 1
02, the air filter 60, the mixer 62, the supercharger 63, the intercooler 6 as described with reference to FIG.
4, the manifold 65, and the rotor shaft 47 are attached as an example, and may further include accessory devices such as various pipes, various measuring devices, various valves, and various control devices.

As described with reference to FIG. 5, the exhaust gas heat exchanger 1 performs heat exchange with the jacket water 50 flowing through the jacket 51 in the gas engine 101 (41).
08 (43), the hot water heat exchanger 109 (44), and the heat radiation heat exchanger 110 (45).
08 (43) is arranged adjacent to the gas engine 101 as shown in FIG. Other heat exchangers can be installed in empty space and may be omitted in some cases.

In the example shown in FIG. 10, the exhaust gas silencer 111 for silencing exhaust gas is configured to be installed at the top of the packaged power generation unit 203, and is installed outside an enclosure 120 described later. The denitration catalyst device 112 (53) for removing nitrogen oxides contained in the engine exhaust gas is installed in the engine exhaust gas line as required. In addition, when the hot water heat exchanger 44 is installed, a cooling tower 49 is separately required, and is often installed outside the package. In addition, the piping for connecting the various devices described above, various measuring devices, and control devices can be appropriately installed.

The control panel 116 for centrally controlling and monitoring the packaged units includes, for example, the instrumentation panel 1.
16a, auxiliary instrument panel 116b, and generator panel 116c
It consists of three. These are arranged on the left side in the power generation unit 203.

The digestion gas purification unit 20 as described above
4 and the power generation unit 203,
Almost the whole is fixed and installed on the base plate 121. In the power generation unit 203, a plurality of anti-vibration devices 119 are provided between the base plate 121 and the floor to suppress the transmission of vibrations of the engine and the generator to the outside or into the unit. An anti-vibration device 119 is appropriately installed between the gas engine 101 and the generator 102 and the floor. In the digestion gas purification unit 204, the vibration isolator 119 can be omitted.

The packaged power generation unit 203 shown in FIG.
It is desirable to cover with 0 to make it an outside air blocking type. Also,
The intake duct 113 and the exhaust duct 11 are provided for ventilation, temperature control, and silencing in the packaged power generation unit 203.
4 and the power generation unit 203 as shown in FIG.
It is desirable to install near the top.

In FIG. 10, control panel 116, exhaust gas muffler 111, intake duct 113, and exhaust duct 1
Fourteen devices were installed outside the enclosure 120, and a set of other devices related to power generation were installed inside. However, the enclosure 120 may be omitted in the case of outdoor installation or when the noise regulation is loose. The enclosure 120 used here is desirably formed of a sound deadening material that provides a sound deadening effect. In addition, one or more doors (not shown) are appropriately installed so that monitoring of equipment in the power generation unit 203 and access for maintenance and inspection can be performed. The intake duct 113 and the exhaust duct 114 are preferably filled with a silencing material to have a silencing effect. Furthermore, the packaged digestion gas purification unit 204 can be covered almost entirely with the enclosure 120, but the enclosure 120 can be omitted here because the degree of noise is extremely low.

The gas engine 101 in the packaged power generation unit 203 can be replaced by a gas turbine (not shown). Also in the case of using a gas turbine, the arrangement and configuration substantially the same as those shown in FIGS. 10A and 10B can be obtained, and the same effects can be obtained.

The packaged power generation unit 203 and digestion gas purification unit 204 of the present invention configured as described above need to have a size that can be delivered on a vehicle. Desirably, width 7000 mm, depth 3
000mm, height 4000mm
If the size of each package is configured, for example, even when the load capacity is 30 ton-class low-bed trailers, traffic restrictions such as height restrictions can be cleared and general-purpose transport can be performed. . When the packaged digestion gas power generation equipment shown in FIG. 10 is a 300 kW (60 Hz) scale power generation equipment, the width is 5000 mm and the depth is 2500.
If the power generation unit 203 is designed to have a size of 3 mm (mm) and a height of 3200 mm (as shown, the intake duct 113 and the like are installed at the top to form a package), the power generation unit 203 can be delivered on a vehicle. The size of the digestion gas purification unit 204 can be smaller than such a power generation unit 203.

FIG. 11 is a schematic diagram showing the configuration of another example of a digestion gas power generation facility for generating power using sewage sludge digestion gas as a fuel according to the present invention. Each of the digestive gas power generation facilities shown here is packaged so that it can be delivered on a car.
Utilizing a digestion gas purification unit 204 including a digestion gas purification device for removing a siloxane compound contained in the digestion gas, a gas engine for providing power generation using the digestion gas passed through the digestion gas purification device as fuel, and a rotor driving force of the gas engine. Power generation unit 20 including a power generator for generating power
In addition to the above, the vehicle further includes a separately provided packaged accessory unit 202 which can be delivered on a vehicle, wherein the accessory unit exchanges heat with jacket water flowing through the gas engine. Exhaust gas heat exchanger that exchanges heat with the exhaust gas of a gas engine, hot water heat exchanger that exchanges heat with cold water and supplies hot water to the outside, and heat exchange for heat radiation that regulates the amount of heat exchange of these heat exchangers A heat exchanger including a heat exchanger and a silencer for silencing exhaust gas of the gas engine. In the figure, related devices are added as appropriate. Here, the description of the same components as those in FIG. 10 is omitted.

FIG. 11A is a schematic cross-sectional view of a packaged digestion gas purification unit, a power generation unit, and an auxiliary unit, and FIG. 11B is a schematic front view of them. The ratio of the size of the device is roughly reflected. However, in these drawings, when the devices overlap in terms of expression and are difficult to see, the notation of the devices may be omitted. Further, piping for connecting each device, other detailed devices, and attached devices are also omitted for convenience of description.

As shown in FIG. 11, the packaged digestion gas purification unit 204 has the same configuration as that described with reference to FIG.
4. Gas booster 107, dehumidifying cooler 105, packed bed 1
06, and an outlet gas filter 104. In the illustrated example, the digestion gas purification unit 204 having such a configuration is installed on the right side of the accessory unit 202 described later. These are the digestion gas purification units 204 of FIG.
As in the case of, various peripheral devices, measuring devices, and the like can be appropriately arranged.

In the example shown in FIG. 11, in order from the left,
The power generation unit 203, the auxiliary unit 202, and the digestion gas purification unit 204 are installed in a straight line, but the arrangement is not limited thereto, and various arrangements can be adopted as exemplified below.

In the packaged power generation unit 203, a gas engine 101 for generating electricity by using the digested gas passed through the digested gas purification unit 204 as a fuel, and a generator 1
The lubricating oil service tank 117, the lubricating oil circulating tank 118, and the auxiliary equipment (not shown), which are related equipment and auxiliary equipment, are arranged at substantially the center. The configuration of the gas engine 101 and the generator 102 including the accessory equipment is as described with reference to FIG. 10 or FIG.

As described with reference to FIG. 5, the exhaust gas heat exchanger 1 performs heat exchange with the jacket water 50 flowing through the jacket 51 in the gas engine 101 (41).
08 (43), the hot water heat exchanger 109 (44), and the heat exchanger 110 (45) for heat dissipation, and the exhaust gas muffler 111 as a series of devices at least comprising a power generation unit 203 As a package that can be delivered separately from the vehicle (package type auxiliary unit 202),
As shown in FIG. 11A, it is installed on the right side of the power generation unit 203.

The digestion gas purification unit 204 is installed on the further right side of the auxiliary unit 202. Such a power generation unit 203, an auxiliary unit 202, and a digestion gas purification unit 204 can be separately delivered on a vehicle and connected on site. In the digestion gas power generation equipment shown in FIG. 11, for example, an engine exhaust gas duct, other instrumentation wires, piping, and the like are connected. In the accessory unit 202, a denitration catalyst device (three-way catalyst device) 112 is installed in the exhaust gas line on the upstream side of the exhaust gas heat exchanger 108, if necessary, in addition to the above-described device. Here, in the case of the stoichiometric combustion (rich burn), the denitration catalyst device 112 can be a three-way catalyst, and in the case of the lean burn (lean burn), a honeycomb type catalyst is used when the exhaust gas temperature is 400 ° C. or less. Can be installed. In addition, pipes for connecting the various devices described above, various measuring devices, and control devices are appropriately installed. However, if the denitration catalyst device is a three-way catalyst, or due to the layout,
The denitration catalyst device 112 can be incorporated in the power generation unit 203.

As shown in FIG. 11, a series of devices consisting of each heat exchanger and exhaust gas muffler was connected to a power generation unit 20.
3 and a package (auxiliary unit 202) separately provided from the digestion gas purification unit 204, for example, when there is a restriction on the site, it is possible to devise the arrangement and install it. Furthermore, even in the case where the power generation scale is large and the whole device is large and it is difficult to deliver the package as a package, it is possible to divide the power generation unit 203, the digestion gas purification unit 204 and the auxiliary unit 202 into three parts. , Each of which has the advantage of being miniaturized to facilitate delivery on a vehicle.

A packaged power generation unit 203,
The control unit 116 for centrally controlling and monitoring the auxiliary unit 202 and the digestion gas purification unit 202 includes, for example,
It is composed of three parts: an instrument panel 116a, an auxiliary instrument panel 116b, and a generator panel 116c. These are arranged adjacent to the outer left side of the power generation unit 203 as in the case of FIG.

[0171] The power generation unit 203, the auxiliary unit 202, and the digestion gas purification unit 204 as described above.
Is installed on the base plate 120 with the entire set of components being fixed. The base plate 120 and the vibration isolator 119 are substantially the same as those in FIG. 10, but the vibration isolator 119 installed on the floor can be omitted for the auxiliary unit 202 and the digestion gas purification unit 204.

The enclosure 120, the intake duct 113, and the exhaust duct 114 that cover substantially the entire packaged unit can be installed as needed. Here, the intake duct 113 and the exhaust duct 114
Is a power generation unit 203 as shown in FIG.
It is desirable to install in In the illustrated example, the enclosure 120 is installed in the power generation unit 203 and the accessory unit 202, but the accessory unit 20
2, the enclosure 120 may be omitted, or may be installed in the digestion gas purification unit 204.

Further, the gas engine 101 in the packaged power generation unit 203 can be replaced with a gas turbine (not shown) as in the case of FIG.
Even when a gas turbine is used, the arrangement and configuration that are substantially the same as those shown in FIGS. 11A and 11B can be obtained, and the same effects can be obtained.

The packaged power generation unit 203, auxiliary unit 202 and digestion gas purification unit 204 of the present invention configured as described above need to have a size that can be delivered on a vehicle. Preferably, the width is 7
If the dimensions of each package are configured to be within the range of 000 mm, depth 3000 mm, and height 4000 mm, for example, when loading on a low-trailer with a loading capacity of 30 ton class, traffic such as height restriction is required. After clearing the regulations, it can be transported for general use. The package-type digestion gas power generation equipment shown in FIG.
0 Hz), and 5000 width
mm (when the control panel 116 is outside the package and is separately installed), 3000 mm in depth, and 3000 mm in height (when the upper intake duct 113 and the exhaust duct 114 are outside the package and are separately installed).
By designing 3, the vehicle can be delivered on a car.
Auxiliary unit 202 and digestion gas purification unit 204
Can be set smaller than the power generation unit 203 as a matter of course.

FIG. 12 shows an example (cross-sectional view) of the arrangement of each unit in the packaged digestion gas power generation equipment of the present invention.

FIG. 12 (a) shows a digestion gas power generation facility including a power generation unit 203 and a digestion gas purification unit 204.
FIG. 1 shows an example in which the digestion gas purification unit 204 is disposed on the right side (longitudinal direction) of the power generation unit 203.
0 corresponds to the configuration exemplified in FIG.

FIG. 12 (b) shows a digestion gas power generation facility including a power generation unit 203 and a digestion gas purification unit 204.
This is an example in which the digestion gas purification unit 204 is installed on the side of the power generation unit 203.

FIG. 12C shows that the digestion gas purification equipment is composed of three units: a power generation unit 203, an auxiliary unit 202, and a digestion gas purification unit 204, and these three units are sequentially arranged in a straight line in the longitudinal direction. FIG.
Corresponds to the configuration illustrated in FIG.

FIG. 12 (d) shows a digestive gas purifying facility composed of a digestive gas purifying unit 204, a power generating unit 203 and an auxiliary unit 202, and these three units are arranged in order in the longitudinal direction. This is an example.

FIG. 12 (e) shows a digestion gas purification facility composed of a power generation unit 203, an auxiliary unit 202 and a digestion gas purification unit 204.
In this example, the digestion gas purification unit 204 is installed on the side of the power generation unit 203, while the auxiliary equipment unit 202 and the auxiliary unit 202 are installed in a straight line in the longitudinal direction.

As described above, in the digested gas power generation equipment of the present invention, various arrangements are possible, and the same effect can be obtained in each case.

The packaged digestion gas power generation equipment according to the present invention includes 300 kW, 500 kW, and 8 kW.
Although the size of the equipment having a power generation scale of 00 kW is partially illustrated, the invention is not limited to this. For example, 1000 kW, 1
Even a relatively large power generation scale such as 500 kW can be packaged. Further, by replacing the gas engine with a gas turbine, it is possible to cope with a larger power generation scale.

As described above, the digestion gas power generation equipment of the present invention has been described with reference to the drawings. However, the present invention is not limited to the arrangement and configuration shown in these drawings, and various modifications may be made without departing from the spirit of the present invention. It is possible.

[0184]

As described above, according to the present invention, it is possible to reduce the size of the engine without increasing the frequency of maintenance and inspection of the engine and the frequency of replacing the catalyst, and to design and maintain the digestion gas at low cost. A power generation facility is provided.

In particular, the digestion gas power generation equipment of the present invention comprises a packaged main unit that can be delivered on a vehicle, wherein the main unit includes a digestion gas purification device for removing a siloxane compound contained in the digestion gas, In the case where a gas engine is provided for power generation using digested gas passing through the apparatus as a fuel and a generator for generating power by using the rotor driving force of the gas engine, conventionally, construction costs and equipment costs are undesirably large. Can be overcome. Further, the power generation equipment can be made compact, and the initial cost can be significantly reduced.

Further, since the digestion gas purifying device for removing the siloxane compound contained in the digestion gas is installed before the digestion gas is introduced into the gas engine, the siloxane gas is removed by the power generation equipment such as the gas engine and the denitration equipment in the latter stage. There is no precipitation of silica (SiO ₂ ) derived from the compound. For this reason, it is possible to avoid the wear and deterioration of the engine parts as in the related art. Further, the problem of deterioration of the denitration catalyst tower catalyst can be avoided beforehand because the siloxane compound in the gas has been removed. As a result, the frequency of maintenance and inspection of power generation equipment and
It is possible to significantly reduce it.

In other words, the digestion gas power generation equipment of the present invention is constructed as a packaged unit that is provided with a digestion gas purification device and can be delivered on a vehicle. Frequency of maintenance and inspection and replacement of the catalyst can be reduced, and as a result, running costs can be reduced.
Further, initial costs for construction costs and equipment costs can be reduced.

In particular, a dehumidifying cooler that cools digestion gas to condense and separate water contained in the digestion gas, and contacts the digestion gas with a porous adsorbent to adsorb the siloxane compound contained in the gas. When a digestion gas purification device is constituted by a packed bed filled with a porous adsorbent to be removed, excess moisture and siloxane compounds contained in the digestion gas can be efficiently removed, and the gas is used as a gas engine fuel. It is possible to obtain a suitable digestion gas. Therefore, the frequency of maintenance and inspection of the gas engine and the subsequent denitration device and the frequency of catalyst replacement can be reduced. Thus, a compact and low initial cost digestion gas power generation facility can be obtained.

In this case, a gas filter for removing soot and dust contained in the digested gas, a mist separator for removing mist contained in the digested gas, a dry desulfurization device for removing hydrogen sulfide contained in the digested gas, A gas booster that pressurizes gas and introduces the gas into the gas engine;
Further, at least one selected from the group consisting of a gas heater for raising the digestion gas to a temperature suitable for the gas engine can be further provided. Thereby, a digestive gas suitable for a gas engine is obtained.

INDUSTRIAL APPLICABILITY The present invention is effectively used for a digestion gas power generation facility that generates power using digestion gas generated from a digestion process of sewage sludge, and its industrial value is large.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example of an overall flow in a digestion gas power generation facility of the present invention.

FIG. 2 is a schematic diagram illustrating a configuration of an example of a digestion gas purification device in the digestion gas power generation facility of the present invention.

FIG. 3 is a schematic diagram illustrating an example of a flow of a digestion gas purification device in the digestion gas power generation facility of the present invention.

FIG. 4 is a schematic diagram showing an example of a flow of a device near a gas engine in the digestion gas power generation facility of the present invention.

FIG. 5 is a schematic diagram showing an example of a flow of a waste heat recovery device in the digestion gas power generation facility of the present invention.

FIG. 6 is a schematic diagram illustrating an example of a digestion gas purification facility according to the present invention.

FIG. 7 is a schematic diagram showing another example of a digestion gas purification facility according to the present invention.

FIG. 8 is a schematic diagram showing another example of a digestion gas purification facility according to the present invention.

FIG. 9 is a schematic diagram showing an example of the arrangement of each packaged unit.

FIG. 10 is a schematic diagram showing another example of a digestion gas purification facility according to the present invention.

FIG. 11 is a schematic diagram showing another example of a digestion gas purification facility according to the present invention.

FIG. 12 is a schematic diagram illustrating an example of the arrangement of packaged units.

FIG. 13 is a schematic diagram showing the entire flow of a conventional digestion gas power generation facility.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Digestion gas tank 2 ... Digestion gas purification apparatus 3 ... Gas engine 4 ... Denitration catalyst apparatus 11 ... Gas introduction pipe 12 ... Digestion gas discharge pipe 13 ... Digestion gas introduction pipe 14 ... Digestion gas discharge pipe 15 ... Cooling pipe 16 ... Cooling water (Supply pipe) 17 ... Cooling water supply device (chiller) 18 ... Drain pipe 19 ... Condensed water tank 20 ... Filled bed (main body) 21 ... Porous adsorbent 22 ... Dehumidifying cooler (main body) 31 ... Gas filter 32 ... Mist separator 33 Gas booster 34 Dehumidifying cooler 35 Gas heater 36 Dry desulfurizer 37 Packed bed 41 Gas engine 42 Generator 43 Exhaust gas heat exchanger 44 Hot water heat exchanger 45 Heat exchange for heat radiation Apparatus 46 ... Digestion gas purification device 47 ... Rotor shaft 48 ... Exhaust gas heater 49 ... Cooling tower 50 ... Jacket water 51 ... Jacket 52 ... Engine exhaust gas 53 ... Denitrification Apparatus 60 Air filter 61 Purified digested gas 62 Mixer 63 Supercharger 64 Intercooler (air cooler) 65 Manifold (fuel gas header) 101 Gas engine 102 Generator 103 Digested gas purifier 104 ... gas filter 105 ... dehumidification cooler 106 ... packed bed 107 ... gas booster 108 ... exhaust gas heat exchanger 109 ... hot water heat exchanger 110 ... heat radiation heat exchanger 111 ... exhaust gas heater 112 ... denitration catalyst device (Tanyu) Catalyst) 113 Intake duct 114 Exhaust duct 115 Ventilation fan 116 Control panel 116a Instrument panel 116b Auxiliary instrument panel 116c Generator board 117 Lubricating oil service tank 118 Lubricating oil circulation tank 119 Vibration isolation Device 120: Enclosure 121: Base plate 201: Packaged main unit DOO 202 ... packaged auxiliary unit 203 ... packaged power generation unit 204 ... packaged digestion gas purification unit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F02C 7/22 F02G 5/04 P F02G 5/04 F02M 21/02 Z F02M 21/02 C10L 3/00 B (72) Inventor Akira Shimizu, 1-2-1, Marunouchi, Chiyoda-ku, Tokyo, Japan Inside Nihon Kokan Co., Ltd. (72) Inventor Hiroshi Shimizu 1-2-1, Marunouchi, Chiyoda-ku, Tokyo, Japan F-term in Nihon Kokan Co., Ltd. (Reference) 4D052 AA02 BA03 BB03 BB06 BB07

Claims (20)

[Claims] 1. A digestion gas power generation facility for generating electricity using sewage sludge digestion gas as fuel, comprising a packaged main unit that can be delivered on a vehicle, wherein the main unit removes a siloxane compound contained in the digestion gas. Digestion gas purification device, and a gas engine that supplies digestion gas passing through the purification device for power generation as fuel,
A digestion gas power generation facility, comprising: a generator that generates power by using a rotor driving force of the gas engine. 2. The digestion gas purifying apparatus comprises: a dehumidification cooler for cooling the digestion gas to condense and separate the water contained in the digestion gas; and contacting the digestion gas with a porous adsorbent. The digestion gas power generation facility according to claim 1, further comprising a packed bed filled with a porous adsorbent for adsorbing and removing a siloxane compound contained in the gas. 3. The digestion gas purifying apparatus includes a gas filter for removing soot and dust contained in the digestion gas, a mist separator for removing mist contained in the digestion gas, and a dry type for removing hydrogen sulfide contained in the digestion gas. The gas turbine further includes at least one selected from the group consisting of a desulfurizer, a gas booster that pressurizes the digestion gas and introduces the gas into the gas engine, and a gas heater that raises the temperature of the digestion gas to a temperature suitable for the gas engine. The digestion gas power generation facility according to claim 2, characterized in that: 4. A heat exchanger for performing heat exchange with jacket water circulated in the gas engine, wherein the main body unit exchanges heat with exhaust gas of the gas engine, and heat exchange with cold water. It further includes a heat exchanger including a hot water heat exchanger for supplying hot water to the outside, a heat exchanger for heat radiation for adjusting a heat exchange amount of these heat exchangers, and a silencer for silencing exhaust gas of the gas engine. The digestion gas power generation facility according to claim 1, wherein: 5. An auxiliary unit which is separately provided and packaged so as to be delivered on a vehicle, wherein the auxiliary unit is a heat exchanger for exchanging heat with jacket water circulated in a gas engine. There is an exhaust gas heat exchanger that exchanges heat with the exhaust gas of a gas engine, a hot water heat exchanger that exchanges heat with cold water and supplies hot water to the outside, and a heat radiation heat exchanger that adjusts the amount of heat exchange of these heat exchangers. The digestion gas power generation facility according to claim 1, further comprising a heat exchanger that includes a heat exchanger that includes the gas engine and a silencer that silences exhaust gas from the gas engine. 6. The apparatus according to claim 1, wherein the main unit further includes a denitration catalyst device for removing nitrogen oxides contained in exhaust gas from the gas engine. Digestion gas power generation equipment. 7. The main unit is of an outside air blocking type substantially entirely covered with an enclosure, and an intake duct and an exhaust duct for ventilation, temperature control, and silencing inside the main unit are provided in the main unit. The digestion gas power generation equipment according to claim 1, wherein the equipment is provided near the top. 8. The digestion gas power generation facility according to claim 1, wherein the main unit includes a control panel therein. 9. The digestion gas power generation equipment according to claim 1, wherein the gas engine is replaced by a gas turbine. 10. The main unit has a width of 7000 m.
The digestion gas power generation facility according to claim 1, having a dimension within a range of m, 3000 mm in depth, and 4000 mm in height. 11. A digestion gas power generation facility for generating electricity using sewage sludge digestion gas as a fuel, comprising: a digestion gas purification unit comprising a digestion gas purification unit for removing a siloxane compound contained in the digestion gas; A gas engine that uses the digested gas passed as fuel for power generation, and a power generation unit that includes a generator that generates power using a rotor driving force of the gas engine, wherein the digestion gas purification unit and the power generation unit are:
Digestion gas power generation facilities, each packaged so that it can be delivered on board. 12. The digestion gas purifying apparatus in the digestion gas purification unit, wherein the digestion gas is cooled by cooling the digestion gas to condense and separate the moisture contained in the gas, and the digestion gas is converted into a porous adsorbent. The digestion gas power generation equipment according to claim 11, further comprising: a packed bed filled with a porous adsorbent that is brought into contact with and adsorbs and removes a siloxane compound contained in the gas. 13. The digestion gas purification device in the digestion gas purification unit, wherein the digestion gas purification device includes a gas filter for removing soot and dust contained in the digestion gas, a mist separator for removing mist contained in the digestion gas, and a digestion gas. At least one selected from a dry desulfurization device that removes hydrogen sulfide, a gas booster that pressurizes the digestion gas and introduces the gas into the gas engine, and a gas heater that raises the temperature of the digestion gas to a temperature suitable for the gas engine. The digestion gas power generation facility according to claim 12, further comprising: 14. A heat exchanger for performing heat exchange with jacket water circulated in the gas engine, an exhaust gas heat exchanger for performing heat exchange with exhaust gas of the gas engine, and a heat exchanger for performing heat exchange with cold water. It further includes a heat exchanger including a hot water heat exchanger for supplying hot water to the outside, a heat exchanger for heat radiation for adjusting a heat exchange amount of these heat exchangers, and a silencer for silencing exhaust gas of the gas engine. The digestion gas power generation facility according to claim 11, characterized in that: 15. A packaged auxiliary unit which is separately provided and can be delivered on a vehicle, wherein the auxiliary unit is a heat exchanger for exchanging heat with jacket water circulated in the gas engine. There is an exhaust gas heat exchanger that exchanges heat with the exhaust gas of a gas engine, a hot water heat exchanger that exchanges heat with cold water and supplies hot water to the outside, and a heat radiation heat exchanger that adjusts the amount of heat exchange of these heat exchangers. Including a heat exchanger,
The digestion gas power generation facility according to claim 11, further comprising a muffler for silencing exhaust gas of the gas engine. 16. The digestion gas power plant according to claim 11, wherein the power generation unit further comprises a denitration catalyst device for removing nitrogen oxides contained in exhaust gas from the gas engine. . 17. The power generation unit is of an outside air blocking type substantially entirely covered with an enclosure, and an intake duct and an exhaust duct for ventilation, temperature control, and silencing inside the power generation unit are provided with the power generation unit. The digestion gas power generation facility according to claim 11, which is provided near the top. 18. The digestion gas power generation equipment according to claim 11, wherein the digestion gas purification unit or the power generation unit includes a control panel. 19. The power generation unit according to claim 1, wherein the gas engine is replaced by a gas turbine.
2. The digestion gas power generation facility according to 1. 20. The digestion gas purification unit and the power generation unit each have a width of 7000 mm and a depth of 3 mm.
The digestion gas power generation facility according to claim 11, having a size within a range of 000 mm and a height of 4000 mm.