WO2004074641A1

WO2004074641A1 - Gas compressor

Info

Publication number: WO2004074641A1
Application number: PCT/JP2003/001938
Authority: WO
Inventors: Masashi Oda; Mutsumi Horitsugi
Original assignee: Hitachi, Ltd.
Priority date: 2003-02-21
Filing date: 2003-02-21
Publication date: 2004-09-02
Also published as: PL208068B1; CN1558098A; CN100491711C; AU2003211411A1; EA200400088A1; PL364455A1; EA007038B1

Abstract

In a station for stepping up the pressure in a natural gas or other fuel gas pipeline, the waste heat discharged from a gas turbine is utilized to generate steam by a waste heat recovery boiler. This steam is passed to a steam turbine to rotate the latter. And the output torque from the steam turbine is utilized to drive a compressor so as to compress fuel gas that is a subject of conveyance. Since the waste heat that has heretofore been discarded is utilized to drive the compressor, the efficiency of the compressor increases, reducing the amount of emission of carbon dioxide. Further, it becomes possible to gain profits by conversion into money of increments of CO2 emission credit and contract for delivery that result from increased efficiency.

Description

Gas compressor Technical field

TECHNICAL FIELD The present invention relates to a gas compressor for a fuel gas pipeline, an exhaust heat recovery compressor attached to a gas compressor, and an investment recovery plan support system for estimating investment recovery potential of an exhaust heat recovery compressor. Background art

Natural gas and petroleum pipelines are equipped with fuel gas pressure stations approximately every 100 km to compensate for the pressure drop in the fuel gas flowing through the pipeline. At the pressurization station, the fuel gas to be transported is used as fuel to drive the gas turbine, and the driving force of the gas turbine drives the compressor that pressurizes the combustion gas to be transported.

The gas turbine has a thermal efficiency of about 35%, but all the combustion gas after driving the gas turbine is discharged as exhaust heat.

However, in recent years, global warming due to carbon dioxide emissions has been taken up as an environmental issue, and developed countries are required to reduce carbon dioxide emissions worldwide. On the other hand, in developing countries, carbon dioxide emissions may be unavoidable in the future due to industrial development, and many countries plan to trade greenhouse gas emission allowances such as carbon dioxide. Have been. Under these circumstances, the present invention has been made, and the present invention relates to a fuel gas pipeline boosting station that contributes to the reduction of carbon dioxide emissions. Provide an investment recovery plan support system for estimating the investment recovery potential of heat recovery compressors and waste heat recovery compressors. Disclosure of the invention

In order to solve the above-mentioned problems, the present invention recovers the heat of the combustion gas in a gas turbine, which has been conventionally discarded, by an exhaust heat recovery boiler, and drives the compressor with the recovered energy, thereby reducing the capacity of the compressor. Was raised. By doing so, the amount of fuel diverted from the fuel gas pipeline to the compressor is reduced, and fuel gas, which is the original purpose of the fuel gas pipeline, can be supplied efficiently. In addition, by attaching such a waste heat recovery boiler and a compressor driven by the recovered energy (exhaust heat recovery compressor) to the existing compressor, the capacity of the compressor can be increased while keeping the existing facilities alive. Can be higher.

The compressor referred to in the present invention is typically a pressure boosting station that increases the gas pressure in the middle of a fuel gas pipeline. For example, a compressor in a liquefied plant that liquefies natural gas before transporting it by tanker It can also be applied to sensors.

In addition, by lending a heat recovery compressor and recovering part of the profits obtained from improving the capacity of the existing compressor as a rental fee, we will spread high-efficiency compressors and contribute to the greenhouse effect. Gas emissions can be reduced worldwide. Therefore, the exhaust heat recovery compressor has an instantaneous flow rate monitor for measuring the flow rate of the fuel gas and an integrated flow rate monitor. By installing a Utah and transmitting the instantaneous flow rate data or the integrated flow rate data measured by these monitors to a remote location by communication means, it will be possible to manage the fuel gas flow rate and improve business efficiency .

Furthermore, since the above-mentioned business requires a prospect of investment recovery, the present invention calculates the income obtained from the improvement of the fuel consumption rate of the compressor by installing the exhaust heat recovery compressor, and Provide an investment recovery planning support system that estimates the recoverability. BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is a schematic diagram of a natural gas pipeline.

FIG. 2 is a configuration diagram of a fuel gas boosting station.

FIG. 3 is a view showing a first modification of the boosting station.

FIG. 4 is a view showing a second modification of the boosting station.

FIG. 5 is a diagram showing a third modification of the boosting station.

FIG. 6 is a diagram showing an example of a business scheme using the present invention, and FIG. 7 is a diagram showing another example of a business scheme using the present invention.

FIG. 8 is a diagram showing still another example of a business scheme using the present invention.

FIG. 9 is a flowchart showing a transaction example using the present invention. FIG. 10 is a block diagram of the investment recovery plan support system.

Fig. 11 is a functional block diagram of the investment recovery plan support system. FIG. 12 is a diagram showing a transaction form of the CO ₂ emission allowance.

The first FIG. 3 is a flow chart showing the transaction examples of C 0 ₂ allowances.

FIG. 14 is a flowchart showing another example of a transaction utilizing the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Next, embodiments of the present invention will be described with reference to the drawings as appropriate. (Natural gas pipeline)

As shown in Figure 1, a natural gas pipeline, which is an example of a fuel gas pipeline, is provided by a natural gas consumer A, a natural gas consuming area, from a natural gas producing area P through a pipeline PL. , B Alternatively, if the natural gas consumer is located in a remote location beyond the sea, the natural gas is liquefied by cooling and compressing the natural gas in liquefaction brand C to reduce the volume, and then a special LPG (Liquefi ed Natura l Gas) transported by tanker.

In the middle of the pipeline PL, pressurizing stations BS1 to BSn for increasing the pressure are appropriately provided at predetermined intervals, for example, every 100 km to improve the flow of natural gas.

In this embodiment, a natural gas pipeline is exemplified as a typical example of a fuel gas pipeline. However, a petroleum pipeline has the same configuration, and the present invention can be applied. It is possible.

(Boost station)

As shown in Fig. 2, the boosting stations BS1 to BSn (hereinafter referred to as "BS") mainly consist of an intake filter 1, an air compressor 2, a combustor 3, a gas turbine 4, a compressor 5, and an exhaust system. It is configured with a heat recovery compressor 1.0.

The intake filter 1 is connected to the air introduction side of the air compressor 2 by a pipe 1a. The air compressor 2 is a compressor that compresses air by the rotation of a turbine, and its discharge side is connected to the combustor 3 by a pipe 2a. The combustor 3 is connected to a branch pipe 3 a for introducing the fuel gas branched from the pipeline P. Then, the compressed air sent from the air compressor 2 is used to burn the fuel gas introduced from the branch pipe 3a. The discharge side of the combustor 3 is connected to the inflow side of the gas turbine 4 by a pipe 3b.

A flow meter 6 for measuring the flow rate of the fuel gas entering the combustor 3 is provided in the branch pipe 3a. As the flow meter 6, for example, an instantaneous flow monitor that measures an instantaneous flow rate can be applied. The instantaneous flow rate data detected by the flow meter 6 is constantly sent to the management terminal 7, and is transmitted from the management terminal 7 to the management system at a remote place via the communication line CL. Here, the management terminal 7 corresponds to the communication means described in the claims. As the flow meter 6, an integrated flow monitor for measuring the integrated flow can be used instead of the instantaneous flow monitor. In this case, the integrated flow rate data may be transmitted to the management terminal 7 regularly or irregularly. When the combustor 3 is composed of a plurality of combustors, a flow meter may be provided in front of each combustor, and the sum of the measured flow rates may be calculated. However, it is also possible to provide one flow monitor at a portion before the flow is divided into a plurality of combustors.

Further, a component analyzer 8 for analyzing a component of the fuel gas is provided in the branch pipe 3a. This is because reductions of fuel gas, for calculating the emission allowances C_〇 _2, is used to determine the carbon percentage in the fuel gas. The component analyzer 8 performs component analysis periodically or irregularly, and outputs the analysis result to the management terminal 7. As the component analyzer 8, gas chromatography or the like can be used. ·.

Further, a component analyzer 8 may be provided downstream of the gas turbine 4 so as to directly measure the concentration of CO ₂ using the gas burned by the gas turbine 4 as a sample. In this case, instead of measuring the fuel gas flow, Measure the amount of exhaust gas.

The gas turbine 4 is connected to the air compressor 2 by a shaft 4a, and drives the air compressor 2 by the rotation torque of the gas turbine 4 due to the combustion gas. The gas turbine 4 is also connected to the compressor 5 via a shaft 4 b, and the compressor 5 is driven by the rotation torque of the gas turbine 4. The gas turbine 4 may be a single-stage type or a multi-stage type.

The above-described gas compressor 9, which is a part including the intake filter 1, the air compressor 2, the combustor 3, the gas turbine 4, and the compressor 5, is a conventional pressurizing station. Note that the gas compressor 9 may be an existing one or may be a newly constructed one. The combustion gas discharged from the gas turbine 4 still has heat of about 500 to 600 ° C, and the exhaust heat recovery compressor 10 is driven by using this heat.

(Exhaust heat recovery compressor)

The exhaust heat recovery compressor 10 includes an exhaust heat recovery boiler 11, a steam turbine 12, a generator 13, a motor 14, and a compressor 15.

The exhaust heat recovery boiler 11 heats water by using exhaust heat introduced from the gas turbine 4 to generate steam. This steam is sent to the steam turbine 12 via the pipe 11a, and the steam that has exited the steam turbine 12 enters the condenser lib and is condensed by being cooled by seawater or the like, and is regenerated and discharged. It is supplied to the heat recovery boiler 11 and circulates between the exhaust heat recovery boiler 11 and the steam turbine 12.

Generator 13 is connected to steam turbine 12 by shaft 13a. The output of the generator 13 is connected to the motor 14, and the output shaft of the motor 14 is connected to the shaft 15 a of the compressor 15.

The compressor 15 is connected downstream of the compressor 5 described above. That is, the combustion gas of the pipeline PL compressed by the compressor 5 is further compressed and sent.

According to the exhaust heat recovery compressor 10 as described above, the steam turbine 12 is rotated by the exhaust heat from the gas turbine 4 which has been conventionally discarded, and the compressor 1 is rotated by utilizing the output torque of the steam turbine 12. 5 is driven, and the pressure of the combustion gas in the pipeline PL is increased by the compressor 15. Therefore, the boosting efficiency is improved in the entire boosting station BS.

Therefore, when comparing the state with the exhaust heat recovery compressor 10 and the state without the exhaust heat recovery compressor 10, if the operation method with a constant fuel gas pressurization capacity (constant fuel gas consignment amount) is adopted, the flow is divided. The amount of combustion gas supplied to the combustor 3 through the pipe 3a can be reduced. Therefore, the emission of carbon dioxide, which is a greenhouse gas, can be reduced. Further, the fuel cost required for the pressurization station BS can be reduced.

In addition, if the amount of fuel gas supplied from the branch pipe 3a to the boosting station BS is constant between the state where the exhaust heat recovery compressor 10 is attached and the state where the exhaust heat recovery compressor 10 is not attached, the state where the boosting station BS is attached By increasing the boosting capacity of, the amount of consignment can be increased.

(Other forms of boosting station)

The above-described boosting station BS can be modified as follows. In the configuration of Fig. 2, the generator 13 is rotated by the output torque of the steam turbine 12 of the exhaust heat recovery compressor 10, and the motor 14 is driven by the output of the generator 13. Output shaft and compressor 15 shaft 15 a Although the connection is made, the shaft 15a of the compressor 15 may be directly connected to the output shaft of the steam turbine 12 as shown in FIG. With this configuration, since there is no energy loss in the generator 13 and the motor 14 shown in FIG. 2, it is possible to provide a boosting station or a waste heat recovery compressor with higher efficiency.

In addition, as shown in FIG. 4, the gas turbine 4, the steam turbine 12, and the compressor 5 can be arranged coaxially, and their shafts can be mechanically connected. Also in this example, compared to the case of FIG. 2, the compressor 5 can be driven without losing the output of the steam turbine 12 by the generator 13 and the motor 14, so that the boosting station is a highly efficient boosting station. be able to. Also, compared to the case of Fig. 3, the gas turbine 4 and the steam turbine 12 drive one coaxial compressor 5, which reduces the mechanical loss of the compressor and increases the efficiency of the combustion gas. Can be boosted. In addition, the number of components constituting the boosting station can be reduced, so that the equipment cost can be reduced. Although the compressor 5 is shown as a single compressor, a plurality of compressors may be arranged coaxially and compressed by a plurality of compressors. For example, a typical natural gas pipeline boosting station could consist of four 14 MW compressors.

In addition, as shown in FIG. 5, the generator 13 may be connected to the system coordinator 16 for connecting an external power supply or an external load to the boosting station BS in FIG. According to such a configuration, it is possible to flexibly cope with a temporal change in the performance required for the boosting station. For example, when a high capacity is required for the boosting station, the power of the motor 14 is increased by supplying electric power from an external power supply via the system coordinator 16 to meet the required capacity, and conversely, I do n’t need that much In this case, the power generated by the generator 13 can be supplied to an external load via the system link 16. As the external load, for example, an in-house power supply such as an office that manages a boost station can be considered. In addition, power may be sold to a power generation company. Further, according to this configuration, even when the gas turbine 4 is stopped, for example, it is possible to drive the motor 14 to drive the compressor 15 by purchasing power from a power generation company. In other words, even when a trouble such as a partial failure of the gas turbine 4 or the like occurs, the motor 14 can be operated by the motor 14.

In addition, when the system coordinator 16 is provided, it is desirable to provide a power monitor 17 that measures the power flowing to the external load via the system coordinator 16. For example, an instantaneous power monitor that measures instantaneous power can be applied as the power monitor 17. The instantaneous power data detected by the power monitor 17 is constantly sent to the management terminal 7, and is transmitted from the management terminal 7 to a remote management system via the communication line CL. Here, the management terminal 7 corresponds to the communication means described in the claims. As the power monitor 17, an integrated power monitor that measures integrated power can be used instead of the instantaneous power monitor. In this case, the integrated power data may be transmitted to the management terminal 7 regularly or irregularly. (Business scheme)

Next, an example in which the gas compressor or the exhaust heat recovery compressor (hereinafter, appropriately referred to as “gas compressor or the like”) of the present invention is applied to an actual business will be described.

In the case of the business scheme as shown in FIG. 6, the gas compressor or the exhaust heat recovery compressor of the present invention is leased from the compressor business unit 96 to a contractor (pipeline company) 91. At the time of this loan, the gas of the present invention Contract with the company on how to distribute the profits obtained by using compressors. The loan may be transferred under contract.

Natural gas is produced by natural gas producers 90 and delivered to liquefiers 92 by contractors 91. In areas directly connected by pipelines, natural gas can be supplied to gas consumers 94 without liquefaction. The liquefier 92 liquefies natural gas and passes LNG to the carrier 93, which supplies the LNG to the gas consumer 94. Then, the gas consumer 94 pays the purchase price to the finance department 97 according to the amount of natural gas used. In the description of the embodiment, the compressor business unit 96, the finance unit 97, and the up-and-coming private power generation unit 95 are examples of belonging to the same company group, and are therefore referred to as “sectors”.

On the other hand, the consignor 91 transfers the consignment allowance and greenhouse gas (CO ₂ ) emission allowance to the compressor business unit 96 in accordance with the contract described above.

The finance department 97 plays a role as an investor in the gas compressors etc. installed in the contractor 91, and replaces the fee for use of the gas compressors etc., which has ownership of the compressor business department 96, with the contractor 91. Pay the compressor business unit 96. On the other hand, the compressor business unit 96 transfers the consignment and C 枠₂ emission allowances received from the consignor 91 to the finance unit 97.

Finance 9 7 benefit redeem the received C 0 ₂ allowances in C 0 ₂ emissions companies or CO ₂ emission allowances巿場. In addition, the above-mentioned consignment quota will be sold to gas consumers 94, etc., or will be redeemed by selling in-house generated power using low-cost LNG.

The in-house power generation sector 95 is supplied with LNG from the carrier 93, supplies the generated power to the power consumers 98, and receives fees from the power consumers 98. LNG fuel costs will be paid to the finance department 97. The finance department 97 pays the natural gas producer 90 the fuel price corresponding to the LNG used by the private power generation department 95 and the LNG used by the gas consumer 94. In addition, the finance department 97 pays to the carrier 93 for the transportation cost of LNG.

According to the business scheme described above, the courier 91 can increase the courier capacity without the need for funds, and profits can be obtained by distributing a part of the profits of this capacity. Can be obtained. In addition, the compressor business unit 96 can benefit from the introduction of the compressor because the contractor 91 introduces the compressor without risk. In addition, the ease with which compressors can be introduced provides a new investment destination for the finance department 97.

Further, since the gas compressor or the like of the present invention can be used by the liquefaction company 92, as shown in FIG. 7, the gas compressor or the exhaust heat recovery compressor is transferred from the compressor business unit 96 to the liquefaction company 92. They can be lent. In this case, by rental gas compressors or the like, depending on the decreased amount of fuel and increased liquefied frame, C o ₂ allowances or liquefied frame is transferred from the liquefied skilled to the compressor division 9 6. The finance department 97 receives CO ₂ emission allowances and liquefaction allowances from the compressor business department 96 in exchange for paying usage fees to the compressor business department 96. In addition, the finance department 97 sells CO ₂ emission allowances to CO ₂ emission companies, or sells them in the CO ₂ emission allowance market, and sells liquefaction allowances to gas demand, users 94, etc. Alternatively, it will be converted to cash by selling in-house power generated by low-cost LNG.

Further, as shown in FIG. 8, the finance department 97 may own a gas compressor and the like. In this case, the finance department 97 orders the compressor business department 96 and pays for the gas compressor, etc., and the compressor business department 96 transfers the equipment to the contractor 91 and liquefaction company 92. Construct You. Contracts are entered into between the contractor 91 and the finance department 97, and between the liquefaction company 92 and the finance department 97, and in accordance with this agreement, the contractor 91 becomes a contractor or transferred the C 0 ₂ allowances Fuaina Nsu sector 9 7, liquefied skill 9 2 YuzuruWataru liquefied frame and CO ₂ allowances finance department 9 7. The finance department 9 7, 6, wheeling frame as in the case of FIG. 7 described above, liquefied frame, or cashing C 0 ₂ allowances. According to such a business scheme, the compressor business unit 96 sells gas compressors and the like and ends, so there is no need to take risks due to fluctuations in gas demand.

(Example of a transaction using an exhaust heat recovery compressor)

When conducting a business using the gas compressor or the like of the present invention in accordance with the business scheme described above, there are three ways of thinking about the profits obtained by introducing the gas compressor and the like. In the following, a description will be given of an example in which, of the gas compressor or the exhaust heat recovery compressor of the present invention, the exhaust heat recovery compressor is installed in an existing gas compressor, and the gas compressor of the present invention is newly added. The same can be considered when introducing to

The first is when the amount of conveyed waste does not change before and after the introduction of an exhaust heat recovery compressor. At this time, the profits will be generated by reducing the amount of natural gas consumed at the boosting station, thereby reducing fuel costs, and by converting the surplus CO ₂ emission allowance to cash. 1).

The second is when the amount of fuel gas consumed at the pressure boosting station is not changed before and after the introduction of the exhaust heat recovery compressor. The profit at this time was increased due to increased capacity of the boosting station, Profit can be generated by converting natural gas for minutes (transaction example 2).

Third, as in Transaction 2, if the amount of fuel gas consumed at the pressure boosting station is not changed before and after the introduction of a waste heat recovery compressor, natural gas can be exchanged for cash. In addition, the total emissions of C _{2 2} have been increased, but profits have been earned by redeeming the C 排出₂ emission allowance recognized for efficiency efforts (transaction example 3)

Hereinafter, the transaction Example 1 to 3 running the facility from the planning of operations, CO. Sequentially described up to ₂ trading. (Transaction example 1)

As shown in Fig. 9, in the business to which the exhaust heat recovery compressor of the present invention is applied, the contractor (user) 9.1 as shown in Fig. 6 and the compressor business unit (equipment supply) are mainly used. The project is planned and put into operation between the finance department (investor) 97 and the finance department (investor) 97.

First, the contractor 91 sends information on the existing boosting station '(gas compressor, existing equipment) to the compressor business unit 96 (S101). The information on the boost station includes, for example, the current equipment configuration and capacity, the current operation status, and the future operation prospects.

Then, the compressor business unit 96 formulates a repair plan for the existing equipment based on the received existing equipment information (S102).

Next, the Compressor Business Unit 96 applied the rehabilitation plan to the Finance

Report on 97 (S103). At this time, the report on the rehabilitation plan includes the initial cost, including the fuel gas reduction rate (fuel reduction rate), equipment costs and installation costs, and the operation and maintenance of the equipment due to the rehabilitation (introduction of the exhaust heat recovery compressor) Includes cost information. Next, the finance department 97 makes a recovery plan based on the reported rehabilitation plan (S104). The investment recovery plan will be implemented using the investment recovery plan support system described later. In order to recover the investment, it is necessary for the finance department 97 to receive a part of the profits obtained from the renovation of the existing equipment, and the finance department 97 calculates how much it will set up . Finance 9 7, if set consideration is determined, as a set consideration, CO ₂ emission allowances received per consignment weight, reduce fuel costs per consignment amount, including guaranteed uptime, information such as the recovery period Report to Compressor Business Unit 96 (S105). When setting the guaranteed occupancy rate, it should be set based on the operating status in advance and the operation plan survey.

Next, the compressor business unit 96 reports the rehabilitation plan and the set consideration reported by the finance unit 97 to the contractor 91 (S106). The contractor 91 examines the rehabilitation (introduction of the exhaust heat recovery compressor) based on the received rehabilitation plan and the information on the set price (S107). As a result of the examination, if the contractor 91 decides to introduce a waste heat recovery compressor, an agreement is signed between the contractor 91 and the compressor business unit 96 (S108), and the compressor business A purchase contract is concluded between the department 96 and the finance department 97 (S109).

Next, the finance department 97 pays the purchase price to the compressor business department 96 (S110), and the compressor business department 96 supplies the waste heat recovery compressor to the existing booster station of the contractor 91. (Modification) to the gas compressor (S111).

Then, after the introduction, the contractor 91 will operate the booster station after the rehabilitation. The compressor business unit 96 performs equipment operation and maintenance services according to the option contract with the contractor 91 (S113).

In addition, the transport company 91 Measure the flow rate and reduce the amount of used fuel gas. 減少 Accordingly, C0 ₂ emission allowance certification is obtained (S114).

Then, the contractor 91 pays the finance department 97 at regular intervals according to the introduction contract (S115). Consideration of payment may or may pay with C Omicron ₂ allowances, to sometimes pay money obtained by multiplying a distribution ratio defined by the contract among the saved fuel costs, it may be both.

Finance 9 7, the one where there was O receiving consideration in C Omicron ₂ allowances in allowances巿場E Micromax redeeming selling C 0 ₂ emissions allowances (S 1 1 6) o

In the above transaction example 1, when the finance department 97 makes an investment recovery plan, it is recommended to use the following investment recovery plan support system.

(Investment recovery plan support system)

As shown in Fig. 10, the investment recovery plan support system 30 consists of a general computer executing a program, and is a central processing unit (CPU) 30a that performs calculations, temporary storage, and comparison. It has a storage device 30b for storing programs and various databases, a keyboard 30c as an input device, and a display 30d as an output device.

Functionally, the investment recovery plan support system 30 is configured as shown in Figure 11. In other words, various input units 31 for inputting values for calculating the investment recovery, income calculation unit 32 for calculating income based on the input values, recoverability determination unit 33, output unit It has 3 4. These components 31 to 34 are realized by the CPU 30a appropriately reading and processing the program in the storage device 30b. In addition, the investment recovery support system 30 includes a database 35 in the storage device 30b. The input section 31 is an initial cost input section 31a, a fuel reduction rate input section 31b, a consignment input section 31c, a distribution rate input section 31d, a collection period input section 31e, a consignment quantity It has an increment input section 31 f and a unit charge entry section 31 g.

The initial cost input section 31a is a section for inputting initial costs including equipment costs and installation costs required for introducing the exhaust heat recovery compressor. The fuel reduction rate input section 31b is a section for inputting the fuel reduction rate, which is the amount of fuel reduction per unit transported amount due to the introduction of the exhaust heat recovery compressor. When entering the fuel reduction rate or letting the investment recovery support system 30 calculate it,

Fuel reduction rate = (Fuel consumption rate before renovation-Fuel consumption rate after renovation)

/ It can be obtained from the fuel consumption rate before renovation X 100 [%]. .

The consignment amount input section 31c is a part for inputting a period consignment amount, which is a consignment amount per unit period.

The distribution ratio input part 31 d is a part for inputting a distribution ratio to be distributed according to a contract previously concluded among the profits obtained by the fuel reduction.

The payback period input section 31e is used to enter the investment payback period.

The transfer volume increment input section 31 f is used to input the increment of the transport volume obtained by introducing the exhaust heat recovery compressor.

The unit charge amount input section 31 g is a part for inputting a unit charge amount, which is a charge amount per unit charge amount.

Database 35 includes gas market database 35a, emission allowance and exchange database 35b, and user credit database 35c. The gas market database 35a stores at least the prices of natural gas (fuel gas), for example, the time-series prices.

The emission allowance market database 3 5b contains at least C 0 ₂ emission allowances (greenhouse For example, it stores the time-series rates.

The user credit database 35c stores data obtained by quantifying the user's solvency.

The income calculator 32 is a part that calculates the income obtained from each input value according to the set calculation mode. Specifically, when trying to make a profit by reducing fuel, the product of the consigned amount, the fuel reduction rate, and the distribution rate, that is,

Revenue-consigned amount X fuel reduction rate X distribution rate

Is calculated by integrating for the collection period.

Then, Ri due to be co ₂ emission allowances left over, in the case of obtaining a profit redeemed this, revenue calculation unit 3 2, from emission allowances巿場database 3 5 b, emission allowances market Extract the price, multiply it by the transferable CO ₂ emission allowance and the distribution rate,

Revenue = CO ₂ emission allowance X emission allowance market price X distribution ratio

Is calculated by integrating for the collection period.

If you want to gain both in fuel reduction and in the transfer of emission allowances, you can find the sum of these.

Furthermore, as in the case of Transaction Example 2, the amount of fuel gas consumed at the boosting station is not changed, and the amount of consigned fuel is increased by improving the capacity of the boosting station, and natural gas (fuel gas) is exchanged for this amount. In order to obtain a profit from the gas, the increase in the consigned amount is multiplied by the market price and distribution rate of the gas extracted from the gas market database 35a,

Revenue-Proportion of consigned amount X Gas market price X Distribution rate

Revenue is calculated by integrating over the collection period.

In addition, in the above calculations, taking into account various risks, In order to do so, the emission market price fluctuation risk coefficient obtained from the emission market database 35b, the gas price fluctuation risk coefficient obtained from the gas market database 35a, and the user credit database 35c The obtained user risk coefficient should be multiplied as appropriate.

The retrievability determiner 33 compares the income obtained during the calculated recovery period with the input initial cost, and if the initial cost is higher, outputs data indicating that recovery is difficult. If the initial cost is smaller, it outputs data indicating that it can be collected. Since the possibility of recovery can be determined by various methods, other methods may be used. For example, it may be configured to calculate and output the yield from the initial cost and each year's income.

The output unit 34 has a function of outputting the data as the determination result output by the recoverability determining unit 33 to the display 30d.

According to such an investment recovery plan support system, when each input value such as the initial cost is input, the income is calculated by the income calculator 32, and the investment can be recovered by comparing the income with the initial cost. Sex is determined. Therefore, it is possible to easily determine whether the investment can be recovered by introducing the exhaust heat recovery compressor. . Further, in a transaction example 1, trading C_〇 ₂ allowances is performed as follows.

(Co ₂ emissions trading system)

C 0 The trading ₂ emissions trading system, as shown in FIG. 1 2, wheeling industry's 9 1, in addition to allowances certification body 4 1 finance team 9 7, allowances Noboru Rokubo management engine 4 2, The transaction log management organization 43 and the applicants for emission allowance 44 are involved. And these contractors 9 1, finance department 9 7, emissions The quota certification body 41, the emission allowance register management body 42, the transaction log management body 43, and the applicants for emission allowance 44 4 are to communicate by means of communication means 91a, 97a, 41a, 42a, respectively. The communication means 91a, 97a, 41a, 42a, 43a, 44a are connected to the network 40. As the network 40, for example, the Internet can be used, or a network constructed with a dedicated line in consideration of security can be used.

The contractor 91 has a terminal device 91b that can communicate with the communication means 91a. The communication means 91 a and the terminal device 91 b correspond to the management terminal 7 in FIGS. 2 to 5 described above.

The finance department 97 receives the fuel gas usage and the fuel gas consumption at the pressure boosting station transmitted from the contractor 91, and based on the fuel gas usage data, the emission allowance (hereinafter referred to as “acquisition It has a server 97b that includes an emission allowance calculation function that calculates the emission allowance and a storage function that stores fuel gas consumption data. The server 97 b is connected to the network 40 via communication means 9.7 a.

The emission allowance certification body 41, which is different from the entity that conducts transactions such as the finance department 97, etc., verifies the emission allowance and decides the amount of allowance when the consignor 91 etc. It is a three-party organization. The emission allowance certification body 41 receives the fuel gas consumption data and fuel gas component data from the contractor 91, verifies this data, and determines the emission allowance and the emission allowance certification function. It has a server 41b that includes a database function that can search for information on emission allowances that are permitted to be viewed, and a communication function that communicates with other computers via the network 40. . The server 41b is connected to the network 40 via the communication means 41a.

The emission allowance register management body 4 2 registers and manages allowances as accounts. It is operated by a third party different from the business entity. The emission allowance registry management institution 42 has a storage function that allows emission allowances to be accumulated as emission allowance information files in a folder called an account assigned to each business operator (business entity). Upon receiving information from a business operator requesting the transfer of emission credits, it makes an inquiry to the transaction log management organization 43, and when it receives information that authenticates the transaction from the transaction log management organization 43, the account owner Transfers (writes out) the emission allowance information file to the desired account and deletes the original allowance information file according to the information transmitted by a certain company that requests the transfer of emission allowances. It has a server 42b including a communication function for communicating with another computer via the “0”. The server 42b is connected to the network 40 via communication means 42a.

The transaction log management organization 43 monitors the emission allowance transaction log (progress) and is operated by a third party different from the transaction entity. The transaction log management institution 43 monitors whether emissions allowance transactions are being performed normally and provides authentication of emissions allowance transactions, a storage function for accumulating emissions allowance transaction logs, and emission allowance transactions. It has a server 43 b including a database function for searching for information permitted to be browsed, and a communication function for communicating with other computers via the network 40. The server 43b is connected to the network 40 via the communication means 43a.

The emission allowance acquisition applicant 44 has a terminal device 44b, and the terminal device 44b is connected to the network 40 via the communication means 44a.

(Operation of CO ₂ Emission Trading System)

Next, the operation of the CO ₂ emission allowance trading system in the present embodiment will be described with reference to FIG. 13 showing a process until the finance department 97 acquires the emission allowance. ,

First, the contractor 91 and the finance department 97 have I Ri resulting co ₂ emission allowances in the installation of the suppressor (hereinafter, described smell of operation Te, simply referred to as "emissions allowances") keep contract for the distribution method (S 1 2 0). In this embodiment, the contractor 91 and the financing department 97 are assumed to be businesses with emission allowances (for example, businesses in Annex I of the Kyoto Protocol). The emission allowances that are subject to the above are emission allowances held by the contractor 91 that will be surplus due to the reduction of fuel gas consumption. In addition, in the contract between the contractor 91 and the finance department 97 of the present embodiment, all emission allowances generated by the operation of the exhaust heat recovery compressor must be converted from the allowances in the account of the contractor 91. As an example, out of the acquired emission allowances, 60% is acquired by the finance department 97, and 40% is acquired by the contractor 91. Therefore, it is sufficient to transfer the allowances held by the contractor 91 corresponding to 60% of the amount of allowances that can be obtained by this project to the account of the finance department 97.

Next, the contractor 91 and the finance department 97 register the contents of the contract with a third-party emission allowance certification body 41 (S122). The emission allowance certification body 41 verifies the project contents and the contract contents, and if there is no problem, approves the contract.

Next, in accordance with the contract, the contractor 91 operates the heat recovery compressor (S122). At this time, the flow rate (fuel gas consumption) of the fuel gas is measured by the flow meter 6 and the component of the fuel gas is measured by the component analyzer 8 as appropriate. The data on fuel gas usage and fuel gas components is called “monitoring data”.

The terminal device 91b of the contractor 91 sends the monitoring data to the server 97b of the finance department 97 regularly or irregularly (S123) o

Next, the terminal device 91b of the contractor 91 is based on the monitoring data. Then, the emission allowance to be acquired is calculated (S124). More specifically, this is performed as follows. First, when the flow meter 6 indicates the instantaneous flow rate, the integrated flow rate (fuel gas consumption) within the calculation period is calculated. When the flow meter 6 is an integrating flow meter, the data measured by the integrating flow meter may be used as it is. Then, based on the result measured by the component analyzer 8, the amount of carbon dioxide emission is calculated. Specifically, if you are measuring the carbon dioxide concentration in the exhaust gas,

CO ² emissions [kg] Per unit volume in exhaust gas. 0 ² concentration [1 ^ / 111 ³ ]

X Total emission gas [Hi ³ ]

Is required. Also, if the component analyzer 8 measures the carbon composition in the fuel, it is assumed that the carbon component in the fuel is completely burned and all of it is changed to carbon dioxide.

CO ² emission [kg] = fuel consumption rate [m ³ / h] X operation time [h]

It can be obtained from the carbon composition in X fuel [kg / m ³ ] X (CO ² molecular weight / carbon atomic weight).

Then, by subtracting the calculated amount of carbon dioxide from the amount of carbon dioxide emitted before the introduction of the exhaust heat recovery compressor, which has been measured in advance, the amount of reduction in the amount of carbon dioxide emitted can be calculated. This reduction is the desired emission allowance data.

Next, the terminal device 9 lb of the contractor 91 periodically sends the monitoring data and the desired emission allowance data calculated in step S122 to the server 4lb of the emission allowance authority 41. (S125).

The server 41b of the emission allowance certification body 41 receives the monitoring data and the emission allowance data sent and checks whether there is any data deficiency, and examines the emission allowance data requested. If there is no problem, the emission allowance is determined (S126). Then, the determined emission allowance is sent to the contractor 9 1 Notify (SI27), and also notify the finance department 97 (S128) o

Next, in accordance with the contract with the finance department 97, the contractor 91 allocates 60% of the emission allowance determined by the emission allowance certification body 41 from the account of the trustee 91 to the finance department 97. Apply to the Emission Register Management Organization 42 to transfer to an account of the same country. That is, identification of the source account, identification of the transfer destination account, data on the amount of emission allowance to be transferred, etc. are transmitted from the terminal device 9 1 b of the contractor 91 to the server 4 2 b of the emission allowance register management organization 42 Yes (S129). Table 1 shows an example of the information on the emission allowance transfer application. Table 1. Emission allowance transfer application information

As shown in Table 1, prior to the transfer, there was an allowance in the account of the consignor 91, but after the transfer, the identification number of the allowance has changed and it has been transferred to the finance department 97. This is because changing the identification number of the emission allowance indicates that the emission allowance to be transferred is the emission allowance generated by the greenhouse gas reduction project.

The emission allowance identification number is a number uniquely assigned to each emission allowance 1t.

The server 4 2b of the emission allowance register management organization 4 2b, which has received the information on the emission allowance transfer application, sends the information on the emission allowance transfer application 4 3 Transfer to 3b and confirm the transfer certification for the transfer of the applied emission allowance (S130). Here, if the server 4 3b of the transaction log management organization 43 determines that there is no problem with the requested transfer, the server 4 3b will operate the server 4 2b of the emission allowance registry management organization 42. Send the transfer certification information to (S131).

The server 4 2b of the emission allowance register management organization 4 2 that has received the transfer authorization information rewrites the emission allowance register according to the information on the emission allowance transfer application (S1332), and consigns the emission allowance 9 1 From the account of Finance Division 97 to the account of Finance Division.

After the rewriting of the allowance register has been completed, the server 42b of the allowance register management organization 42 sends a notice of the end of the transfer of the allowance to the server 97b of the finance department 97 (S 1 3 3), and a notification of the end of the transfer of the emission allowance is transmitted to the terminal device 9 1 b of the consigner 91 (S 13 4).

Through the above process, the emission allowances obtained from the power generation project using methane generated from the coal mine excavation are distributed to the finance department 97 and the contractor 91.

Furthermore, when the finance department 9 7 wishes to redeem C 0 ₂ allowances. In the same manner as the consignment skilled 9 1 had transferred the CO ₂ emission allowances to finance team 9 7, allowances obtained from Finance 9 7 Transferring the CO ₂ emission allowance to applicants 4 4 is sufficient.

(Transaction example 2)

Next, the case of transaction example 2 will be described. The basic flow of Transaction Example 2 is the same as that of Transaction Example 1, and therefore the description focuses on the differences.

In Transaction 2, since the amount of fuel gas consumed is kept constant and the amount of consignment is increased, it is easy to calculate profits based on the amount of consignment. for that reason As shown in Fig. 14, when the information on the existing equipment is transferred from the contractor 91 to the compressor business unit 96 (S141), the contract fee per unit is also provided as information.

Then, since the consignment amount is used for the calculation of the consideration, the consignment amount is measured during operation (S142) as shown in step S142, and the consignment amount per unit amount is added to this consignment amount. Multiply and calculate income.

Then, in accordance with the distribution ratio determined in the contract between the courier 91 and the finance department 97, a part of the income obtained by the courier 91 is paid to the finance department 97 as consideration (S1 43 ). Alternatively, instead of money, the right to use the pipeline free of charge is transferred from the consignor 91 to the finance department 97 (S144).

If the finance department 97 obtains consideration for the right to use the pipeline free of charge, it converts it into money at the gas plant GM and obtains money (S144).

To calculate revenue based on the amount of consignment as in Transaction Example 2, it is necessary to install a flow meter to measure the amount of consignment, but natural gas producers 90 have traditionally If there is a flow meter to use, it can be used as it is. If there is no existing flow meter, for example, a flow meter will be installed at the downstream end of the pipeline within the jurisdiction of the contractor 91, and the natural gas (fuel gas) flow rate will be constantly, regularly, or irregularly measured. Measure. Alternatively, from the flow rate of the natural gas passing through the boosting station BSn at the specific position shown in Fig. 1, the power of the gas compressor is increased at the downstream boosting stations BSn + l, BSn + 2 The amount of consigned gas can also be measured by subtracting the total amount of gas consumed. (Transaction example 3)

In Transaction 3, fuel consumed by the gas compressor at the boost station Without changing the amount of gas, the company introduced the exhaust heat recovery compressor 10 and operated it, earning revenue based on the increase in the amount of consignment, as in the case of Transaction Example 2, and improving the capacity of the gas compressor. Ri by the door, get the revenue C_〇 La Les ,, certified a ₂ emission allowances the C 0 ₂ emission allowances to cash in CO ₂ emission allowances巿場.

Therefore, the data of the increased amount of consignment and the emission allowance data desired to be acquired are transmitted from the terminal device 91b of the consignor 91 to the server 41b of the emission allowance certification organization 41, and the certification is received.

After the certification is received and the allowances are approved, the same as in Transaction Example 1 can be applied.

Although the preferred embodiments of the present invention have been described above, the present invention can be implemented with appropriate modifications without departing from the spirit thereof. Industrial applicability

According to the present invention, the efficiency of a gas compressor can be improved in a fuel gas pipeline such as a natural gas pipeline. As a result, the emission of carbon dioxide, which is a warming gas, can be reduced, contributing to environmental protection. Further, the amount of decrease in emissions of carbon dioxide, or by the efficiency of the gas compressor was directed above, certified CO ₂ emission allowances, by conversion gold the C 0 ₂ allowances, to benefit it can. Alternatively, you can benefit from cashing in increments of the consignment volume.

Claims

The scope of the claims

1. A diverter pipe for diverting a part of the fuel gas to be transported from the fuel gas pipeline, an air compressor, and fuel supplied from the diverter pipe using compressed air compressed by the air compressor. A combustor for burning gas, a gas turbine driven by combustion gas discharged from the combustor, and a compressor driven by utilizing output torque of the gas turbine to pressurize the fuel gas to be transported An exhaust heat recovery boiler for recovering exhaust heat discharged from the gas turbine, and a steam turbine driven by steam discharged from the exhaust heat recovery boiler, and utilizing an output torque of the steam turbine. A fuel gas pipeline configured to drive the compressor or another compressor for increasing the pressure of the fuel gas to be transported. Emissions of the gas compressor.

2. The gas compressor for a fuel gas pipeline according to claim 1, comprising: a generator coupled to an output shaft of the steam turbine; and a motor driven by electric power generated by the generator. A gas compressor for a fuel gas pipeline, wherein a compressor or another compressor is driven by the motor.

3. The gas compressor of a fuel gas pipeline according to claim 2, wherein the power generator is connected to a system coordinator connecting an external power supply or an external load. Gas compressor.

4. A diverter pipe for diverting a part of the fuel gas to be transported from the fuel gas pipeline, an air compressor, and the fuel supplied from the diverter pipe using compressed air compressed by the air compressor. A combustor for burning gas; a gas turbine driven by combustion gas discharged from the combustor; — A waste heat recovery compressor attached to an existing gas compressor of a combustion gas pipeline having a first compressor driven by utilizing an output torque of the gas turbine and boosting the fuel gas to be transported; An exhaust heat recovery boiler that recovers exhaust heat discharged from the gas turbine; a steam turbine that is driven by steam discharged by the exhaust heat recovery boiler; An exhaust heat recovery compressor comprising: a second compressor that pressurizes a target fuel gas.

5. The exhaust heat recovery compressor according to claim 4, further comprising: a generator coupled to an output shaft of the steam turbine; and a motor driven by electric power generated by the generator. (2) An exhaust heat recovery compressor, wherein the compressor is driven by the motor.

6. The exhaust heat recovery compressor according to claim 5, wherein the generator is connected to a system link for connecting an external power supply or an external load.

7. The gas compressor for a fuel gas pipeline according to claim 1, wherein the diverter includes an instantaneous flow rate monitor for measuring an instantaneous flow rate of the fuel gas, and an instantaneous flow rate data detected by the instantaneous flow rate monitor. A gas compressor for a fuel gas pipeline, comprising a communication means for transmitting the gas to the device.

8. The gas compressor for a fuel gas pipeline according to claim 1, wherein an integrated flow rate monitor that measures an integrated flow rate of the fuel gas in the flow dividing pipe, and the integrated flow rate data detected by the integrated flow rate monitor are remotely transmitted. A gas compressor for a fuel gas pipeline, comprising communication means for transmitting to a local device.

9. The exhaust heat recovery compressor according to claim 6, wherein the system An instantaneous power monitor for measuring an instantaneous power flowing out of the generator to an external load via a coordinator; and a communication means for transmitting the instantaneous power data detected by the instantaneous power monitor to a remote device. Exhaust heat recovery compressor characterized by:

10. The exhaust heat recovery compressor according to claim 6, wherein the integrated power monitor measures an integrated power flowing from the generator to an external load via the system link, and the integrated power monitor detects the integrated power. A waste heat recovery compressor comprising communication means for transmitting the integrated power data to a remote device.

1 1. From the profit obtained by attaching the exhaust heat recovery compressor according to any one of claims 4 to 6 to an existing gas compressor in a fuel gas pipeline, An investment recovery plan support system for estimating the investment recovery potential of a compressor.

At least a gas market database that stores the fuel gas market prices,

An initial cost input unit for inputting an initial cost including at least equipment cost and installation cost of the exhaust heat recovery compressor;

A fuel reduction rate input unit for inputting a fuel reduction rate, which is a fuel reduction amount per unit delivered amount by introducing the exhaust heat recovery compressor,

A consignment amount input unit for inputting a period consignment amount, which is a consignment amount per unit period; a distribution ratio input unit for inputting a distribution ratio, which is a contractual ratio of the profit obtained by reducing fuel;

A payback period input section for inputting a payback period,

An income calculating unit that integrates the product of the fuel reduction rate, the period consignment amount, the distribution rate, and the gas rate calculated based on the gas exchange database for an investment recovery period to calculate an income, An investment recovery plan support system, comprising: a revenue calculated by the revenue calculating unit; and a recoverability determining unit that compares the initial cost.

12. The investment recovery plan support system according to claim 11 has an emission allowance market database that stores at least market prices of greenhouse gas emission allowances.

The profit calculating unit calculates a profit obtained by trading the greenhouse gas emission allowance obtained by introducing the exhaust heat recovery compressor based on the emission allowance market database, and calculates an income by adding this value. An investment recovery plan support system characterized by the configuration.

13. Due to the benefits obtained by attaching the exhaust heat recovery compressor according to any one of claims 4 to 6 to the existing gas compressor of the fuel gas pipeline, An investment recovery planning support system for estimating the possibility of recovering the investment of an exhaust heat recovery compressor.

A transfer amount increment input unit for inputting a part of the transfer amount obtained by introducing the exhaust heat recovery compressor,

A unit fee input unit for inputting a unit fee, which is a fee for the unit amount of the fee,

A distribution ratio input section for inputting a distribution ratio, which is a contractually allocated ratio of profits obtained from fuel reduction,

A payback period input section for inputting a payback period,

An income calculation unit that calculates an income by integrating the product of the increment of the charge, the unit charge, and the distribution rate for an investment recovery period;

An investment recovery plan support system, comprising: a revenue calculated by the revenue calculating unit; and a recoverability determining unit that compares the initial cost.

14. The gas compressor for a fuel gas pipeline according to claim 1, wherein: an instantaneous flow rate monitor for measuring an instantaneous flow rate of the fuel gas in the branch pipe; and an instantaneous flow rate data detected by the instantaneous flow rate monitor. , Calculate the cumulative flow rate data within a predetermined period, calculate the greenhouse effect gas emission allowance from this integrated flow rate data, and transmit this greenhouse effect gas emission allowance data to a remote device. A gas compressor for a fuel gas pipeline, comprising communication means.

15. The gas compressor for a fuel gas pipeline according to claim 1, wherein: the integrated flow rate monitor for measuring the integrated flow rate of the fuel gas in the branch pipe; and the integrated flow rate data detected by the integrated flow rate monitor. A gas compressor for a fuel gas pipeline, comprising a communication means for calculating a greenhouse effect gas emission allowance from a computer and transmitting the data of the greenhouse effect gas allowance to a device at a remote location.