JP7485559B2 - Water treatment system and water treatment method - Google Patents

Description

The present invention relates to a water treatment system and a water treatment method.

Various technologies have been proposed to use sewage sludge generated during sewage treatment at water treatment facilities as fuel for generating electricity at power generation facilities.

For example, the following Patent Document 1 discloses a technology in which sewage sludge generated by sewage treatment at a sewage treatment plant is used as fuel in an adjacent thermal power plant. In this technology, since the sewage treatment plant and the thermal power plant are located side by side, fuel can be transported from the sewage treatment plant to the thermal power plant by pipeline or vehicle. This reduces the cost of transporting fuel.

Japanese Patent Application Laid-Open No. 11-114597

However, the technology in Patent Document 1 only mentions the reduction in fuel transportation costs when it comes to cost reduction. For sewage treatment operators and thermal power generation operators, it is preferable to further reduce costs associated with their operations. Therefore, it is desirable to be able to reduce costs other than fuel transportation costs as well.

In view of the above problems, the object of the present invention is to provide a water treatment system and a water treatment method that can reduce the construction costs of a water treatment facility, thereby reducing the costs of equipment and fuel costs in the operation of the water treatment facility.

In order to solve the above-mentioned problems, a water treatment system according to one aspect of the present invention includes a water treatment facility owned by a water treatment company and installed on the premises of the water treatment company, a power generation facility owned by a power generation company and installed on the premises of the water treatment company , and a management server . The water treatment facility includes a solid fuel production unit that dries dewatered sludge using a heat medium supplied from the power generation facility to produce sludge fuel, and a storage unit that stores treated water obtained by treating water that has flowed into the water treatment facility. The power generation facility includes a power generation unit that generates electricity using heat generated by burning the sludge fuel as fuel, a first boiler that heats a heat medium supplied to the water treatment facility using the heat generated by the combustion, a heat medium supply unit that supplies the heat medium heated in the first boiler to the water treatment facility, a condenser that condenses the heat medium that has passed through a turbine of the power generation unit by cooling it using the treated water, and the treated water used for cooling in the condenser is returned to the storage unit. the management server has a water treatment facility information receiving unit that receives, from a terminal of the water treatment facility, treatment plan data indicating a schedule for sludge treatment at the water treatment facility and information indicating the storage level of a hopper that stores the generated sludge fuel; a power generation facility information receiving unit that receives, from the terminal of the power generation facility, information indicating the remaining amount of sludge fuel at the power generation facility; a control unit that calculates an acceptance amount indicating the amount of sludge fuel that can be accepted at the power generation facility based on the received information indicating the remaining amount of sludge fuel, and calculates an input amount of fuel to be used at the power generation facility based on the received treatment plan data and information indicating the storage level; a water treatment facility information transmitting unit that transmits information indicating the calculated acceptance amount to the terminal of the water treatment facility; and a power generation facility information transmitting unit that transmits information indicating the calculated acceptance amount and input amount, and the received treatment plan data and information indicating the storage level to the terminal of the power generation facility .

A water treatment method according to one aspect of the present invention is a water treatment method in a water treatment system having a water treatment facility owned by a water treatment business operator and installed on the premises of the water treatment business operator , a power generation facility owned by a power generation business operator and installed on the premises of the water treatment business operator, and a management server , the method including: in the water treatment facility, a solid fuel generation unit dries dewatered sludge using a heat medium supplied from the power generation facility to generate sludge fuel, and a storage unit stores treated water obtained by treating water that has flowed into the water treatment facility; in the power generation facility, a power generation unit generates power by utilizing heat generated by burning the sludge fuel as fuel, a first boiler heats a heat medium supplied to the water treatment facility using the heat generated by the combustion, a heat medium supply unit supplies the heat medium heated in the first boiler to the water treatment facility, a condenser condenses the heat medium that has passed through a turbine of the power generation unit by cooling it using the treated water, and a return flow path stores the treated water used for cooling in the condenser. and returning the water to the storage section , and in the management server, a water treatment facility information receiving section receives from a terminal of the water treatment facility treatment plan data indicating a sludge treatment schedule at the water treatment facility and information indicating a storage level of a hopper that stores the generated sludge fuel, a power generation facility information receiving section receives from the terminal of the power generation facility information indicating the remaining amount of the sludge fuel at the power generation facility, a control section calculates an acceptance amount indicating the amount of sludge fuel that can be accepted at the power generation facility based on the received information indicating the remaining amount of sludge fuel, and calculates an input amount of fuel to be used at the power generation facility based on the received treatment plan data and information indicating the storage level, a water treatment facility information transmitting section transmits information indicating the calculated acceptance amount to the terminal of the water treatment facility, and a power generation facility information transmitting section transmits information indicating the calculated acceptance amount and input amount, and the received treatment plan data and information indicating the storage level to the terminal of the power generation facility .

The present invention reduces the construction costs of water treatment facilities, thereby reducing the costs of equipment and fuel costs in operating the water treatment facilities.

1 is a block diagram showing an example of a configuration of a water treatment system according to an embodiment of the present invention. 1 is a block diagram showing an example of the configuration of a water treatment facility according to an embodiment of the present invention. 1 is a block diagram showing an example of the configuration of a power generation facility according to an embodiment of the present invention. 2 is a block diagram showing an example of the configuration of a power generation unit according to the present embodiment. FIG. FIG. 2 is a block diagram showing an example of a configuration of a management server according to the present embodiment. FIG. 2 is a diagram showing an example of an input/output relationship between a water treatment facility and a power generation facility according to the present embodiment. FIG. 13 is a block diagram showing an example of the configuration of a power generation facility in a modified example of the present embodiment. FIG. 13 is a block diagram showing an example of a configuration of a power generation unit in a modified example of the embodiment.

The following describes in detail an embodiment of the present invention with reference to the drawings.

<1. Configuration of water treatment system>
An example of the configuration of a water treatment system according to this embodiment will be described with reference to Fig. 1. Fig. 1 is a block diagram showing an example of the configuration of a water treatment system according to this embodiment. As shown in Fig. 1, the water treatment system 1 has a water treatment facility 2, a power generation facility 3, and a management server 4. The water treatment facility 2 is connected to the management server 4 via a network NW so as to be able to send and receive information. The power generation facility 3 is similarly connected to the management server 4 via the network NW so as to be able to send and receive information.

The water treatment facility 2 is a facility owned by a water treatment business operator and is provided within the site 5 of the water treatment business operator. The water treatment facility 2 is, for example, a sewage treatment plant. Sewage treatment plants generally treat sewage through three processes: a water treatment process, a sludge treatment process, and a sludge incineration process. In the water treatment process, sewage flowing in from the outside is purified and sludge is separated and extracted from the sewage. In the sludge treatment process, the extracted sludge is concentrated and dehydrated to produce dehydrated sludge. In the sludge incineration process, the dehydrated sludge is incinerated in an incinerator.

The water treatment facility 2 supplies treated water from which sludge has been removed in the water treatment process to the power generation facility 3. The water treatment facility 2 also supplies dried sludge, which is the dehydrated sludge that has been dehydrated in the sludge treatment process, to the power generation facility 3.

The power generation facility 3 is a facility owned by a power generation company, and is provided within the site 5 of the water treatment company where the water treatment facility 2 is provided. The power generation facility 3 is, for example, a thermal power plant. In thermal power plants, power is generally generated using heat generated by burning fuel.

The power generation facility 3 uses, for example, biomass fuel delivered from outside as fuel. In other words, the power generation facility 3 is also a biomass power generation facility. The power generation facility 3 may also use sludge fuel as fuel. The sludge fuel is, for example, dried sludge supplied from the water treatment facility 2. The fuel may also be a mixture of dried sludge supplied from the water treatment facility 2 and other biomass fuel delivered from outside. The power generation facility 3 supplies the electricity generated by power generation and steam converted from waste heat to the water treatment facility 2.

The water treatment facility 2 can use the steam supplied from the power generation facility 3 to dry the dewatered sludge. This means that the water treatment operator does not need to install equipment to generate steam on their own, and can therefore install cheaper drying equipment compared to a water treatment facility that does not use the steam supplied from the power generation facility 3. This allows the water treatment operator to reduce the construction costs of the water treatment facility 2.

The power generation company trades electricity and steam generated at the power generation facility 3 with the water treatment company. This allows the power generation company to continue stable business operations over the long term.

The management server 4 manages information related to the water treatment facility 2 and information related to the power generation facility 3. For example, the management server 4 shares information related to the treatment at the water treatment facility 2 with the power generation facility 3, and shares information related to the treatment at the power generation facility 3 with the water treatment facility 2. This allows the water treatment business operator and the power generation business operator to carry out treatment at their own facilities depending on the treatment status at the other facility.

<2. Configuration of water treatment facility>
An example of the configuration of the water treatment facility 2 will be described with reference to Fig. 2. Fig. 2 is a block diagram showing an example of the configuration of the water treatment facility 2 according to this embodiment. As shown in Fig. 2, the water treatment facility 2 has a water treatment unit 200, a storage unit 202, a sludge treatment unit 204, a solid fuel production unit 206, a hopper 208, a storage level detection unit 210, and a terminal 212. The water treatment facility 2 also has flow paths 10, 11, 12, and 13. Note that the flow paths 11, 12, and 13 are connected to the power generation facility 3.

The water treatment unit 200 performs a water treatment process. For example, the water treatment unit 200 purifies the sewage flowing in from the flow path 10 and separates and extracts sludge from the sewage. A portion of the treated water from which the sludge has been extracted flows into the storage unit 202, and the remainder is discharged into a river or the like. In addition, the sludge extracted from the sewage is transported to the sludge treatment unit 204.

The storage section 202 is a facility for storing treated water. For example, the storage section 202 stores treated water that has been produced by treating water that has flowed into the water treatment facility 2. The treated water stored in the storage section 202 is supplied to the power generation facility 3 via the flow path 11 by a pump or the like (not shown). The storage section 202 also stores treated water returned from the power generation facility 3 via the flow path 12 (return flow path). A portion of the treated water stored in the storage section 202 is withdrawn and returned to the water treatment process or discharged outside the facility.

The treated water stored in the storage section 202 may be supplied as general purpose water to the water treatment facility 2. When performing the water treatment process and sludge treatment process in the water treatment facility 2, general purpose water is used for cleaning equipment such as sludge dewatering machines and for cooling pumps, and the treated water is used for these purposes. There is no need to install a separate treated water tank to supply general purpose water, which reduces the facility space and the tank installation and maintenance costs. In addition, by sending a portion of the treated water stored in the storage section 202 to the water treatment section and allowing new treated water to flow into the storage section 202, the quality of the treated water in the storage section can be maintained.

The storage section 202 is equipped with, for example, a sensor that measures the amount of stored treated water, a sensor that measures the temperature of the treated water, a sensor that measures the flow rate of the treated water supplied to the power generation facility 3, and a sensor that measures the flow rate of the treated water returned to the water treatment facility 2.

These sensors are used in the storage unit 202 to control the amount of treated water sent from the storage unit 202 to the water treatment unit. For example, in order to maintain the amount of treated water stored in the storage unit 202 within a predetermined liquid level range, the return pump is operated when the set liquid level reaches a lower limit, and the return pump is stopped when the set liquid level reaches an upper limit.

The sludge treatment section 204 performs the sludge treatment process. For example, the sludge treatment section 204 thickens and dehydrates the sludge extracted from the sewage in the water treatment section 200 to produce dehydrated sludge. The dehydrated sludge is transported to the solid fuel production section 206.

The solid fuel generating unit 206 generates solid fuel. For example, the solid fuel generating unit 206 uses a heat medium to dry and carbonize dewatered sludge, thereby generating solid fuel such as dried sludge and carbonized sludge. Note that solid fuel also includes powdered and granular fuels. An example of the heat medium used by the solid fuel generating unit 206 is steam supplied from the power generation facility 3 via the flow path 13. The steam referred to here is water vapor generated by heating water. Note that the heat medium includes water vapor in a gaseous state and water in a liquid state.
The solid fuel production section 206 uses the steam to dry the dewatered sludge to produce dried sludge. The produced dried sludge is transported to a hopper 208.

The hopper 208 is a facility for storing dried sludge. For example, the hopper 208 stores the dried sludge generated in the solid fuel generation unit 206. The dried sludge stored in the hopper 208 is supplied to the power generation facility 3. The dried sludge is transported to the power generation facility 3 by at least one of a continuous and batch type transportation method, for example. In the continuous type transportation method, the dried sludge is transported by, for example, a belt conveyor. In the batch type transportation method, the dried sludge is loaded into a container such as a flexible container and transported by a vehicle.

The storage level detection unit 210 detects the storage level of the dried sludge in the hopper 208. The storage level is an index showing the amount of dried sludge stored in the hopper 208. The index of the storage level is, for example, weight, volume, etc. The storage level detection unit 210 transmits the detection result of the storage level to the terminal 212 of the water treatment facility 2.

The terminal 212 is a terminal used by a water treatment business operator. As shown in FIG. 2, the terminal 212 includes a receiving unit 2120, a control unit 2122, a memory unit 2124, a transmitting unit 2126, and an output unit 2128. The receiving unit 2120 is a second receiving unit. The output unit 2128 is a third output unit.

The receiving unit 2120 receives various information from the management server 4. For example, the receiving unit 2120 receives an acceptance amount indicating the amount of dried sludge that can be accepted at the power generation facility 3 from the management server 4. The receiving unit 2120 inputs the received acceptance amount to the control unit 2122. The receiving unit 2120 also receives the detection result of the storage level in the hopper 208 from the storage level detection unit 210. The receiving unit 2120 inputs the received detection result of the storage level to the control unit 2122.

The control unit 2122 has a function of controlling the overall operation of the terminal 212. The control unit 2122 is realized, for example, by causing a CPU (Central Processing Unit) that the terminal 212 has as hardware to execute a program.

The control unit 2122 controls, for example, the output of the detection results of the accepted amount and storage level received by the receiving unit 2120, the transmission of the processing plan data indicating the schedule for sludge processing in the water treatment facility 2, and the detection results of the storage level.

The storage unit 2124 has a function of storing various information. The storage unit 2124 is configured by a storage medium, for example, a hard disk drive (HDD), a flash memory, an electrically erasable programmable read only memory (EEPROM), a random access read/write memory (RAM), a read only memory (ROM), or any combination of these storage media. The storage unit 2124 can be, for example, a non-volatile memory.
The memory unit 2124 stores, for example, data on accepted amounts and processing plans.

The transmission unit 2126 transmits various information to the management server 4. For example, the transmission unit 2126 transmits processing plan data to the management server 4. The transmission unit 2126 also transmits the detection results of the storage level to the management server 4.

The output unit 2128 outputs various information. For example, the output unit 2128 outputs the acceptance amount received by the receiving unit 2120. As an example, if the terminal 212 is equipped with a display device such as a display as hardware, the output unit 2128 causes the display device to display the acceptance amount.

The water treatment business operator can determine the amount of dried sludge to be supplied to the power generation facility 3 based on the outputted accepted amount. The accepted amount is calculated based on the remaining amount of dried sludge detected at the power generation facility 3, and is information shared with the water treatment facility 2. Therefore, by performing processing based on the accepted amount, the water treatment business operator can perform processing according to the processing status at the power generation facility 3. The water treatment business operator can adjust the processing plan, for example, in response to weather fluctuations, facility inspections, etc. When making adjustments, the water treatment business operator can easily adjust the amount of dried sludge produced by knowing the accepted amount at the power generation facility 3.

<3. Configuration of power generation facility>
An example of the configuration of the power generation facility 3 will be described with reference to Fig. 3 and Fig. 4. Fig. 3 is a block diagram showing an example of the configuration of the power generation facility 3 according to this embodiment. Fig. 4 is a block diagram showing an example of the configuration of a power generation unit according to this embodiment.

As shown in FIG. 3, the power generation facility 3 has a hopper 300, an incinerator 302, a group of boilers 304, a boiler 310, a dust collector 312, a cooler 314, a blower 316, a chimney 318, a power generation unit 320, a condensate supply unit 322, a heat medium supply unit 324, a remaining amount detection unit 326, and a terminal 328. The power generation facility 3 also has flow paths 11, 12, 13, 30, 33, and 40.

The hopper 300 is a facility for storing dried sludge. For example, the hopper 300 stores dried sludge supplied from the water treatment facility 2. The dried sludge stored in the hopper 300 is fed into the incinerator 302.

The incinerator 302 incinerates the dried sludge that has been put in. In the incinerator 302, exhaust gas is generated by incinerating the dried sludge. The temperature of the exhaust gas is, for example, about 850°C to 1000°C. The exhaust gas generated in the incinerator 302 is supplied to the boiler group 304 and the boiler 310.

The boiler included in the boiler group 304 is the second boiler in this embodiment. The boiler group 304 heats the heat medium used to heat the heat medium before it passes through the turbine of the power generation unit 320, using heat generated by the combustion of dried sludge in the incinerator 302.

The boiler group 304 is realized by, for example, a heat medium boiler or a steam boiler. Below, an example in which the boiler group 304 is a heat medium boiler will be described. In addition, a low boiling point medium is an example of a heat medium before passing through the turbine of the power generation unit 320. An example of a heat medium used to heat the heat medium before passing through the turbine of the power generation unit 320 is heat oil. There is no particular limitation on the heat medium, and a general heat medium oil can be used, but it is preferable to use a heat medium oil with a high boiling point of 300 to 400°C and for high temperatures. This is because it is possible to supply high-temperature heat at low pressure using heat oil in a liquid state. The boiler group 304 extracts heat from the exhaust gas by heat exchange between the heat medium oil and the exhaust gas, and heats the heat medium oil.

As shown in FIG. 3, boiler group 304 includes boiler 306 and boiler 308.

The boiler 306 exchanges heat between the thermal oil flowing into the flow path 32 from the boiler 308 and the exhaust gas flowing in from the incinerator 302, and heats the thermal oil. In the boiler 306, the exhaust gas flowing in from the incinerator 302 is a high-temperature object, and the thermal oil is a low-temperature object. Therefore, in the boiler 306, heat is transferred from the high-temperature exhaust gas to the low-temperature thermal oil through heat exchange. In other words, the thermal oil extracts heat from the exhaust gas.

The thermal oil heated by the heat exchange is supplied to the power generation unit 320 via a flow path 33 connected to the power generation unit 320. In addition, the exhaust gas cooled by the heat exchange is supplied to the boiler 308 and the boiler 310.

The boiler 308 exchanges heat between the thermal oil flowing into the flow path 31 from the flow path 30 connected to the power generation unit 320 and the exhaust gas flowing in from the boiler 306, and heats the thermal oil. In the boiler 308, the exhaust gas flowing in from the boiler 306 is a high-temperature object, and the thermal oil is a low-temperature object. Therefore, in the boiler 308, heat is transferred from the high-temperature exhaust gas to the low-temperature thermal oil through heat exchange. In other words, the thermal oil extracts heat from the exhaust gas.

The thermal oil heated by the heat exchange is supplied to the boiler 306. The exhaust gas cooled by the heat exchange is supplied to the dust collector 312.

The temperature of the thermal oil supplied from the power generation unit 320 to the boiler 308 via flow path 30 is about 180°C. The thermal oil is heated by passing through flow path 31 in the boiler 308 and flow path 32 in the boiler 306. As a result, the temperature of the thermal oil supplied from the boiler 306 to the power generation unit 320 via flow path 33 rises to, for example, about 320°C.

The boiler 310 is the first boiler in this embodiment. The boiler 310 uses heat generated by combustion to heat the heat medium supplied to the water treatment facility 2. The boiler 310 is realized, for example, by a heat medium boiler. One example of the heat medium used in the boiler 310 is water vapor generated by heating the condensate supplied from the condensate supply unit 322.

The boiler 310 exchanges heat between the steam flowing into the flow path 50 and the exhaust gas flowing in from the boiler 306, and heats the steam. In the boiler 310, the exhaust gas flowing in from the boiler 306 is a high-temperature object, and the steam is a low-temperature object. Therefore, in the boiler 310, heat is transferred from the high-temperature exhaust gas to the low-temperature steam through heat exchange. In other words, the steam extracts heat from the exhaust gas.

The water vapor heated by the heat exchange is supplied to the heat medium supply section 324. The exhaust gas cooled by the heat exchange is supplied to the dust collector 312.

The dust collector 312 removes dust from the exhaust gas flowing in from the boilers 308 and 310. The exhaust gas from which dust has been removed by the dust collector 312 is supplied to the cooler 314. The temperature of the exhaust gas flowing in from the boilers 308 and 310 is, for example, about 190 to 230°C. The temperature of the exhaust gas supplied to the cooler 314 is, for example, about 200°C.

The cooler 314 cools the exhaust gas supplied from the dust collector 312. The exhaust gas cooled by the cooler 314 is discharged from the chimney 318 by the blower 316.

The power generation unit 320 generates electricity using heat generated by burning fuel. Here, the fuel includes dried sludge and biomass fuel. The power generation unit 320 is capable of generating electricity using heat generated by burning the dried sludge and biomass fuel as fuel.

As shown in FIG. 4, the power generation unit 320 has a regenerator 3200, an evaporator 3202, a turbine generator 3204, a condenser 3206, and a circulation pump 3208. The power generation unit 320 also has flow paths 11, 12, 20, 21, 22, 23, 24, 25, 30, 33, and 40.

The regenerator 3200 controls the circulation of the low boiling point medium in the power generation unit 320. An example of the low boiling point medium is organic silicon. For example, the regenerator 3200 supplies the liquid low boiling point medium supplied from the condenser 3206 via the flow path 25 to the evaporator 3202 via the flow path 20. The temperature of the liquid low boiling point medium supplied from the regenerator 3200 to the evaporator 3202 is, for example, 150°C or higher. The gauge pressure of the liquid low boiling point medium is, for example, less than 1.4 MPaG. The regenerator 3200 also supplies the gaseous low boiling point medium (steam) supplied from the turbine generator 3204 via the flow path 22 to the condenser 3206 via the flow path 23.

The evaporator 3202 heats and evaporates liquid supplied from the outside. For example, the evaporator 3202 heats a liquid low-boiling-point medium supplied from the regenerator 3200 via the flow path 20 to generate vapor of the low-boiling-point medium. The evaporator 3202 exchanges heat between the heat transfer oil supplied from the boiler 306 via the flow path 33 and the liquid low-boiling-point medium, heating the liquid low-boiling-point medium. In the evaporator 3202, the heat transfer oil is a high-temperature object, and the liquid low-boiling-point medium is a low-temperature object. Thus, in the evaporator 3202, heat transfers from the high-temperature heat transfer oil to the low-temperature liquid low-boiling-point medium through heat exchange. In other words, the liquid low-boiling-point medium extracts heat from the heat transfer oil.

The steam generated by heating the liquid low-boiling point medium through heat exchange is supplied to the turbine generator 3204 through the flow path 21. The temperature of the steam supplied from the evaporator 3202 to the turbine generator 3204 is, for example, less than 300°C. The gauge pressure of the steam is, for example, less than 1.4 MPaG. The thermal oil cooled through heat exchange is supplied to the boiler 308 through the flow path 30.

The temperature of the thermal oil flowing from the boiler 306 to the evaporator 3202 is, for example, about 320°C. The temperature of the thermal oil supplied from the evaporator 3202 to the boiler 308 is, for example, about 180°C.

The turbine generator 3204 generates electricity by driving the turbine. For example, the turbine generator 3204 generates electricity by passing steam supplied from the evaporator 3202 via the flow path 21 through the turbine, which drives the turbine. The turbine generator 3204 supplies the generated electricity to the water treatment facility 2 or an external system via the flow path 40. The turbine generator 3204 also supplies the steam that has passed through the turbine to the regenerator 3200 via the flow path 22. The temperature of the steam supplied from the turbine generator 3204 to the regenerator 3200 is, for example, less than 250°C. The gauge pressure of the steam is, for example, less than 0 MPaG.

The condenser 3206 cools and condenses the gas supplied from the outside. For example, the condenser 3206 condenses the gaseous low boiling point medium supplied from the regenerator 3200 via the flow path 23 by cooling it using the treated water (cooling water) supplied from the reservoir 202 of the water treatment facility 2 via the flow path 11. The condenser 3206 exchanges heat between the treated water supplied from the reservoir 202 of the water treatment facility 2 via the flow path 11 and the gaseous low boiling point medium, and cools the gaseous low boiling point medium. In the condenser 3206, the gaseous low boiling point medium is a high-temperature object, and the treated water is a low-temperature object. Therefore, in the condenser 3206, heat is transferred from the high-temperature gaseous low boiling point medium to the low-temperature treated water by heat exchange. In other words, the treated water extracts heat from the gaseous low boiling point medium.

The gaseous low-boiling-point medium is cooled by the heat exchange, and the liquid low-boiling-point medium generated is supplied to the circulation pump 3208 via the flow path 24. In addition, the treated water heated by the heat exchange is returned from the condenser 3206 to the storage section 202 of the water treatment facility 2 via the flow path 12.
When the treated water heated by heat exchange is discharged into a river or the like, it is necessary to provide a separate wastewater treatment facility in order to meet wastewater standards. However, providing additional wastewater treatment facilities in the power generation facility 3 is not preferable because it would incur equipment costs, treatment costs, etc. Therefore, it is preferable that the treated water used in the power generation facility 3 is returned to the water treatment facility 2 and treated again.

By returning the treated water to the storage section 202 instead of the water treatment section 200 (water treatment process) of the water treatment facility 2, the treated water can be reused, and since it is mixed with new treated water, the load and fluctuations on the water treatment can be reduced compared to when the entire amount of treated water used as cooling water is returned to the water treatment facility 2.
Furthermore, if the storage section 202 is used both as a receiving tank for treated water before use as cooling water and as a receiving tank for treated water after use, the number of tanks can be reduced, enabling further reduction in equipment costs.

The temperature of the treated water flowing from the storage section 202 of the water treatment facility 2 to the condenser 3206 is, for example, about 30°C. The temperature of the treated water returned from the condenser 3206 to the storage section 202 of the water treatment facility 2 is, for example, about 40°C.

Here, the temperature of the treated water in the storage section 202 may be controlled so that treated water at a predetermined temperature is sent to the condenser 3206. This makes it possible to suppress fluctuations in the temperature of the treated water sent to the condenser 3206, making it easier to control the temperature on the condenser 3206 side.
Furthermore, even when the treated water in storage section 202 is used as general service water in water treatment facility 2, it can be easily utilized because the treated water has a predetermined temperature. The temperature of the treated water in storage section 202 can be controlled, for example, by a treated water inflow rate adjustment means that adjusts the amount of treated water flowing into storage section 202, and a treated water withdrawal means that sends the treated water in storage section 202 to water treatment facility 2.

The circulation pump 3208 is a pump that circulates the low boiling point medium used for power generation in the power generation unit 320. For example, the circulation pump 3208 supplies the liquid low boiling point medium supplied from the condenser 3206 via the flow path 24 to the regenerator 3200 via the flow path 25. The temperature of the liquid low boiling point medium supplied from the circulation pump 3208 to the regenerator 3200 is, for example, less than 100°C. The gauge pressure of the liquid low boiling point medium is, for example, less than 1.4 MPaG.

Conventionally, thermal power plants require large amounts of cooling water to cool the vaporized steam in the boiler and condense it in the condenser. For this reason, conventional thermal power plants are located on the coast and rely on seawater for cooling water. In addition, the cost of installing equipment to use seawater is required. In contrast, in this embodiment, the power generation facility 3 (thermal power plant) is attached to the water treatment facility 2, so it is possible to use purified treated water discharged in large quantities from the water treatment facility as cooling water. As a result, even in inland areas where it is not possible to obtain large amounts of cooling water, it is possible to install a power plant by affixing it to the water treatment facility. In addition, the cost required for equipment to use seawater can be reduced.

The condensate supply unit 322 supplies a heat medium to the boiler 310. The condensate supply unit 322 supplies steam obtained by heating condensate to the boiler 310 as the heat medium. The condensate supply unit 322 may supply the condensate directly to the boiler 310 as the heat medium. When condensate is supplied to the boiler 310, the boiler 310 may supply the steam to the heat medium supply unit 324 by heating and evaporating the condensate through heat exchange with heat transfer oil.

The heat medium supply unit 324 supplies the heat medium heated in the boiler 310 to the water treatment facility 2. The heat medium supply unit 324 may have a function of detecting the amount of heat medium supplied to the water treatment facility 2. If the heat medium supply unit 324 has a function of detecting the amount of heat medium supplied, the heat medium supply unit 324 transmits the detection result of the amount of heat medium supplied to the management server 4.

The remaining amount detection unit 326 detects the remaining amount of dried sludge stored in the hopper 300. The remaining amount detection unit 326 transmits the detection result of the remaining amount of dried sludge to the terminal 328 of the power generation facility 3.

The terminal 328 is a terminal used by a power generation company. As shown in FIG. 3, the terminal 328 includes a receiving unit 3280, a control unit 3282, a memory unit 3284, a transmitting unit 3286, and an output unit 3288. The receiving unit 3280 is the first receiving unit.

The receiving unit 3280 receives various information from the management server 4. For example, the receiving unit 3280 receives information such as treatment plan data for the water treatment facility 2, detection results of the storage level, the amount accepted, and the amount input from the management server 4. The receiving unit 3280 inputs the received information to the control unit 3282. The receiving unit 3280 also receives the detection results of the remaining amount of dried sludge in the hopper 300 from the remaining amount detection unit 326.

The control unit 3282 has a function of controlling the overall operation of the terminal 328. The control unit 3282 is realized, for example, by causing a CPU (Central Processing Unit) that the terminal 328 has as hardware to execute a program.

The control unit 3282 controls the output of various information, such as the treatment plan data received by the receiving unit 3280, the detection result of the storage level, the detection result of the remaining amount of dried sludge, the accepted amount, the input amount, and the like.
The control unit 3282 controls the transmission of various information. For example, the control unit 3282 causes the remaining amount of dried sludge detected by the remaining amount detection unit 326 to be transmitted from the transmission unit 3286 to the water treatment facility 2.

The memory unit 3284 has a function of storing various information. The memory unit 3284 is configured with a storage medium, for example, a hard disk drive (HDD), a flash memory, an electrically erasable programmable read only memory (EEPROM), a random access read/write memory (RAM), a read only memory (ROM), or any combination of these storage media. The memory unit 3284 may be, for example, a non-volatile memory.

The transmission unit 3286 transmits various information to the management server 4. For example, the transmission unit 3286 transmits the remaining amount of dried sludge to the management server 4.

The output unit 3288 outputs various information. As shown in FIG. 3, the output unit 3288 has a storage level output unit 3288a and an input amount output unit 3288b. The storage level output unit 3288a is the first output unit. The input amount output unit 3288b is the second output unit.

The storage level output unit 3288a outputs the storage level detection result received by the receiving unit 3280. As an example, if the terminal 328 has a display device such as a display as hardware, the storage level output unit 3288a causes the display device to display the storage level detection result.

The power generation company can decide on the next steps based on the outputted detection results of the storage level. For example, in the water treatment facility 2, it is decided whether or not to supply dried sludge to the power generation facility 3 depending on the storage level in the hopper 208. Therefore, the power generation company can decide whether or not to prepare to accept dried sludge based on the outputted detection results of the storage level.

The input amount output unit 3288b outputs the input amount received by the receiving unit 3280. As an example, if the terminal 328 is equipped with a display device such as a display as hardware, the input amount output unit 3288b causes the display device to display the input amount.

The power generation company inputs the dried sludge and biomass fuel to be used as fuel into the incinerator 302 based on the output input amount. The input amount is calculated based on the treatment plan data or the detection results of the storage level at the water treatment facility 2, and is information shared with the power generation facility 3. Therefore, by inputting fuel based on the input amount, the power generation company can carry out treatment according to the treatment status at the water treatment facility 2.

4. Management Server Configuration
An example of the configuration of the management server 4 will be described with reference to Fig. 5. Fig. 5 is a block diagram showing an example of the configuration of the management server 4 according to this embodiment. As shown in Fig. 5, the management server 4 has a water treatment facility information receiving unit 400, a power generation facility information receiving unit 402, a control unit 404, a memory unit 406, a water treatment facility information transmitting unit 408, and a power generation facility information transmitting unit 410. The water treatment facility information transmitting unit 408 is a first transmitting unit. The power generation facility information transmitting unit 410 is a second transmitting unit.

The water treatment facility information receiving unit 400 receives information transmitted from the water treatment facility 2. For example, the water treatment facility information receiving unit 400 receives information such as treatment plan data and storage levels transmitted from the water treatment facility 2. The water treatment facility information receiving unit 400 inputs the received information.

The power generation facility information receiving unit 402 receives information transmitted from the power generation facility 3. For example, the power generation facility information receiving unit 402 receives the remaining amount of dried sludge transmitted from the power generation facility 3. The power generation facility information receiving unit 402 inputs the received remaining amount of dried sludge to the control unit 404.

The control unit 404 has a function of controlling the overall operation of the management server 4. The control unit 404 is realized, for example, by causing a CPU (Central Processing Unit) that the management server 4 has as hardware to execute a program.

The control unit 404 calculates various information. For example, the control unit 404 calculates the amount of acceptance based on the received detection result of the remaining amount of dried sludge. As an example, the control unit 404 calculates the difference between the storage capacity of the hopper 300 and the remaining amount of dried sludge stored in the hopper 300 as the acceptance amount (actual value). The control unit 404 may also calculate the future acceptance amount (predicted value). For example, the control unit 404 calculates the reduction rate of the dried sludge based on the difference between multiple detection results received at a predetermined time interval. The control unit 404 calculates the remaining amount of dried sludge based on the calculated reduction rate. Then, the control unit 404 predicts the difference between the calculated remaining amount of dried sludge and the storage capacity of the hopper 300 as the future acceptance amount.

The control unit 404 also calculates the input amounts of dried sludge and biomass fuel to be used as fuel at the power generation facility 3 based on the received treatment plan data or the detection results of the storage level. For example, if the storage level in the hopper 208 is low (the storage amount is small), it is predicted that it will take a long time for the dried sludge to be transported from the water treatment facility 2 to the power generation facility 3. In this case, if a lot of dried sludge is consumed at the power generation facility 3, there is a risk that all of the dried sludge will be consumed at the power generation facility 3 before the dried sludge is supplied from the water treatment facility 2. Therefore, the control unit 404 calculates a small input amount of dried sludge to be used as fuel and a large input amount of biomass fuel.

On the other hand, when the storage level of the hopper 208 is high (the amount of storage is large), it is predicted that it will not take long for the dried sludge to be transported from the water treatment facility 2 to the power generation facility 3. In this case, even if a large amount of dried sludge is consumed at the power generation facility 3, it is predicted that there is no risk of all of the dried sludge being consumed at the power generation facility 3 before it is supplied from the water treatment facility 2. Therefore, the control unit 404 may calculate a large amount of dried sludge to be input to be used as fuel and a small amount of biomass fuel to be input. The control unit 404 may also determine when the dried sludge will be transported based on the treatment plan data.

The storage unit 406 has a function of storing various information. The storage unit 406 is configured with a storage medium, for example, a hard disk drive (HDD), a flash memory, an electrically erasable programmable read only memory (EEPROM), a random access read/write memory (RAM), a read only memory (ROM), or any combination of these storage media. The storage unit 406 may be, for example, a non-volatile memory.

The water treatment facility information transmission unit 408 transmits information to the water treatment facility 2. For example, the water treatment facility information transmission unit 408 transmits the accepted amount calculated by the control unit 404 to the terminal 212 of the water treatment facility 2.

The power generation facility information transmission unit 410 transmits information to the power generation facility 3. For example, the power generation facility information transmission unit 410 transmits information such as the treatment plan data and storage level received by the water treatment facility information receiving unit 400 to the terminal 328 of the power generation facility 3. The power generation facility information transmission unit 410 also transmits information such as the accepted amount and input amount calculated by the control unit 404 to the terminal 328 of the power generation facility 3.

<5. Input/Output Relationships Between Facilities>
An example of an input/output relationship between the water treatment facility 2 and the power generation facility 3 will be described with reference to Fig. 6. Fig. 6 is a diagram showing an example of an input/output relationship between the water treatment facility 2 and the power generation facility 3 according to this embodiment. The water treatment facility 2 and the power generation facility 3 are provided within the site 5 of a water treatment business operator.

As shown in FIG. 6, the dried sludge stored in the hopper 208 of the water treatment facility 2 is transported to the hopper 300 of the power generation facility 3 by at least one of a continuous or batch type transportation method. This allows the power generation facility 3 to use the transported dried sludge as fuel. In addition, the power generation facility 3 can reduce the amount of fuel obtained from outside the water treatment business operator's site 5, and can reduce the costs of purchasing fuel (fuel costs) and the costs of transporting fuel (transport costs), etc.

The power generation facility 3 generates electricity by using heat generated by burning the dried sludge transported from the water treatment facility 2 and stored in the hopper 300. The power generation facility 3 supplies steam heated by heat exchange with the exhaust gas generated by the combustion of the dried sludge to the heat medium supply unit 324 of the power generation facility 3.

The heat medium supply unit 324 supplies steam to the solid fuel generation unit 206 of the water treatment facility 2 via the flow path 13. This allows the solid fuel generation unit 206 to use the supplied steam to dry the dehydrated sludge produced in the water treatment facility 2 and generate dried sludge. Therefore, compared to a water treatment facility that does not use steam supplied from the power generation facility 3, the water treatment facility 2 does not need to install equipment to generate steam for drying the dehydrated sludge, which reduces equipment costs and fuel costs, and allows the introduction of cheaper drying equipment. Therefore, the water treatment facility 2 can reduce the costs (construction costs) associated with constructing the water treatment facility 2.

In addition, the power generation unit 320 of the power generation facility 3 cools the gaseous low boiling point medium using treated water supplied from the storage unit 202 of the water treatment facility 2 via the flow path 11 in power generation using heat generated by burning dried sludge. The power generation unit 320 returns the treated water used to cool the gaseous low boiling point medium to the storage unit 202 of the water treatment facility 2 via the flow path 12. This allows the power generation facility 3 to reduce the cost of cooling the gaseous low boiling point medium. For example, since it is no longer necessary to construct equipment to use seawater in conventional power generation facilities, the cost (construction costs) of constructing the equipment can also be reduced.

The power generation unit 320 also supplies the generated electricity to the water treatment facility 2 via the flow path 40. This allows the water treatment facility 2 to operate using the electricity supplied from the power generation facility 3. This allows the water treatment facility 2 to reduce costs (operating expenses) and the like associated with operating the water treatment facility 2.

The water treatment business operator and the power generation business operator may trade resources such as dried sludge, steam, treated water, and electricity that they supply to each other's facilities at a price. Water treatment facility 2 and power generation facility 3 may also sell these resources to external businesses at a price. This allows the water treatment business operator and the power generation business operator to earn profits and continue stable business operations over the long term.

As described above, the water treatment system 1 according to this embodiment includes a water treatment facility 2 provided on the site 5 of a water treatment company, and a power generation facility 3 of a power generation company provided within the site 5 of the water treatment company.
The solid fuel production section 206 of the water treatment facility 2 dries the dewatered sludge using condensed steam supplied from the power generation facility 3, producing sludge fuel. The storage section 202 of the water treatment facility 2 stores treated water obtained by treating the water that has flowed into the water treatment facility 2.
The power generation section 320 of the power generation facility 3 generates power by utilizing heat generated by burning the sludge fuel as fuel. The boiler 310 of the power generation facility 3 heats the condensed water steam by using heat generated by the combustion. The heat medium supply section 324 of the power generation facility 3 supplies the steam heated by the boiler 310 to the water treatment facility 2. The condenser 3206 of the water treatment facility 2 condenses the low boiling point medium steam that has passed through the turbine of the power generation section 320 by cooling it with the treated water. The flow path 12 of the power generation facility 3 returns the treated water used for cooling in the condenser 3206 to the storage section 202.

With this configuration, the water treatment facility 2 of the water treatment system 1 dries the dehydrated sludge using steam supplied from the power generation facility 3 located on the same premises, and produces sludge fuel. As a result, compared to a water treatment facility that does not use steam supplied from the power generation facility 3, the water treatment facility 2 does not need to install equipment to generate steam for drying the dehydrated sludge, which reduces equipment costs and fuel costs, and allows the introduction of cheaper drying equipment. This makes it possible to reduce the cost (construction costs) of constructing the water treatment facility 2.

The water treatment system 1 according to this embodiment therefore reduces the construction costs of the water treatment facility, thereby reducing the costs of equipment and fuel costs involved in the operation of the water treatment facility.

6. Modifications
A modified example of this embodiment will be described. In the above embodiment, an example has been described in which the power generation facility 3 has a first boiler and a second boiler, and the generator is a turbine generator, but the present invention is not limited to such an example. In this modified example, an example will be described in which the power generation facility 3 has only a first boiler, and the generator is a steam turbine. A specific example of the steam turbine is a back pressure turbine.

The configuration of the power generation facility and power generation unit in the modified example will be described below with reference to Figures 7 and 8. Figure 7 is a block diagram showing an example of the configuration of the power generation facility 3 in the modified example according to this embodiment. Figure 8 is a block diagram showing an example of the configuration of the power generation unit 320 in the modified example according to this embodiment. Below, explanations that overlap with those in the above-mentioned embodiment will be omitted.

As shown in FIG. 7, the power generation facility 3 in the modified example has a hopper 300, an incinerator 302, a group of boilers 304, a dust collector 312, a cooler 314, a blower 316, a chimney 318, a power generation unit 320, a heat medium supply unit 324, a remaining amount detection unit 326, and a terminal 328. The power generation facility 3 also has flow paths 11, 12, 13, 30, 33, 34, and 40. As shown in FIG. 8, the power generation unit 320 in the modified example has a steam turbine 3210 and a condenser 3212. The power generation unit 320 also has flow paths 11, 12, 30, 33, 34, 35, and 40.

In the power generation facility 3 of the embodiment described above, the first boiler, boiler 310, plays a role of heating the heat medium using heat generated by combustion. In the power generation facility 3 of the modified example, the boiler group 304 plays the role of boiler 310 instead. That is, in this modified example, the boiler group 304 is the first boiler.

In the power generation facility 3 of the above embodiment, steam (water vapor) heated in the boiler 310 is supplied to the water treatment facility 2 by the heat medium supply unit 324. In the power generation facility 3 of the modified example, steam passing through the steam turbine 3210 is supplied to the water treatment facility 2 by the heat medium supply unit 324.

The hopper 300 and incinerator 302 in the modified example are the same as the hopper 300 and incinerator 302 in the above-described embodiment. The incinerator 302 incinerates the dried sludge fed from the hopper 300. The exhaust gas generated by the incineration of the dried sludge is supplied to the boiler group 304.

The boiler group 304 in the modified example heats the heat medium using heat generated by the combustion of the dried sludge in the incinerator 302. Examples of heat media heated by the boiler group 304 include water (condensate) and steam (water vapor).

As shown in FIG. 7 , the boiler group 304 includes a boiler 306 and a boiler 308 .
The boiler 306 has, for example, an evaporator and a heater. The evaporator generates steam by heat exchange between water flowing from the boiler 308 into the flow path 32 and exhaust gas flowing from the incinerator 302 into the boiler 306. The heater heats the steam by heat exchange between the steam generated by the evaporator and the exhaust gas flowing from the incinerator 302 into the boiler 306.

The steam heated by the heat exchange is supplied to the power generation unit 320 via a flow path 33 connected to the power generation unit 320. The gauge pressure of the steam is, for example, 3 to 4 MPaG. In addition, the exhaust gas cooled by the heat exchange is supplied to the boiler 308.

The boiler 308 has, for example, a coal economizer. The coal economizer exchanges heat between water (condensate) flowing from flow path 30 connected to the condenser 3212 of the power generation unit 320 into flow path 31 and exhaust gas flowing from the boiler 306, thereby heating the water. The water heated by the heat exchange is supplied to the boiler 306. The exhaust gas cooled by the heat exchange is supplied to the dust collector 312.

The explanation of the dust collector 312, cooler 314, blower 316, and chimney 318 in the modified example will be omitted as they overlap with the explanation in the above embodiment.

In the above embodiment, the power generation unit 320 generates electricity using thermal oil heated by the boiler group 304 and a low boiling point medium circulating within the power generation unit 320. In the modified example, the power generation unit 320 generates electricity using steam heated by the boiler group 304.

The steam turbine 3210 generates electricity by using steam to drive the turbine. For example, in the steam turbine 3210, steam supplied from the boiler 306 via flow path 33 passes through the turbine, driving the turbine to generate electricity. The steam turbine 3210 supplies the generated electricity to the water treatment facility 2 or an external system via flow path 40. The steam turbine 3210 also supplies the steam that has passed through the turbine to the heat medium supply section 324 via flow path 34. The steam turbine 3210 also supplies the steam that has passed through the turbine to the condenser 3212 via flow path 35.

The condenser 3212 cools and condenses gas supplied from the outside. For example, the condenser 3212 cools and condenses steam supplied from the steam turbine 3210 via the flow path 35. For this cooling, treated water (cooling water) supplied from the reservoir 202 of the water treatment facility 2 via the flow path 11 is used. The condenser 3212 exchanges heat between the steam supplied from the steam turbine 3210 via the flow path 35 and the treated water supplied from the reservoir 202 of the water treatment facility 2 via the flow path 11 to cool the steam. In the condenser 3212, the steam is a high-temperature object, and the treated water is a low-temperature object. Therefore, in the condenser 3212, heat is transferred from the high-temperature steam to the low-temperature treated water by heat exchange. In other words, the treated water extracts heat from the steam. In the above embodiment, the heat medium sent to the water treatment facility 2 and the heat medium passing through the turbine of the power generation unit 320 are different, but in this modified example, they are the same heat medium, for example, steam.

The condensate generated by cooling the steam through the heat exchange is supplied to the boiler 308 through the flow path 30. The treated water heated through the heat exchange is returned from the condenser 3212 to the storage section 202 of the water treatment facility 2 through the flow path 12.
When the treated water heated by heat exchange is discharged into a river or the like, it is necessary to provide a separate wastewater treatment facility in order to meet wastewater standards. However, providing additional wastewater treatment facilities in the power generation facility 3 is not preferable because it would incur equipment costs, treatment costs, etc. Therefore, it is preferable that the treated water used in the power generation facility 3 is returned to the water treatment facility 2 and treated again.

By returning the treated water to the storage section 202 instead of the water treatment section 200 (water treatment process) of the water treatment facility 2, the treated water can be reused, and compared to returning the entire amount of treated water used as cooling water to the water treatment facility 2, the water treatment load and fluctuations can be reduced because it is mixed with new treated water. Also, if the storage section 202 is used as both a receiving tank for treated water before use and a receiving tank for treated water after use, the number of tanks can be reduced, making it possible to further reduce equipment costs.

The temperature of the treated water flowing from the storage section 202 of the water treatment facility 2 to the condenser 3212 is, for example, about 20°C. The temperature of the treated water returned from the condenser 3212 to the storage section 202 of the water treatment facility 2 is, for example, about 30°C.

The heat medium supply unit 324 in the modified example supplies steam supplied from the steam turbine 3210 via the flow path 34 to the water treatment facility 2 via the flow path 13. The temperature of the steam supplied to the water treatment facility 2 is, for example, 187°C. The gauge pressure of the steam is, for example, 1.1 MPaG. The heat medium supply unit 324 may have a function of detecting the amount of steam supplied to the water treatment facility 2. When the heat medium supply unit 324 has a function of detecting the amount of steam supplied, the heat medium supply unit 324 transmits the detection result of the amount of steam supplied to the management server 4.

The explanations of the remaining amount detection unit 326, terminal 328, receiving unit 3280, control unit 3282, memory unit 3284, transmitting unit 3286, and output unit 3288 in the modified example will be omitted because they overlap with the explanations in the above embodiment.

The above describes in detail an embodiment of the present invention with reference to the drawings, but the specific configuration is not limited to the above, and various design changes can be made without departing from the spirit of the present invention.

1...water treatment system, 2...water treatment facility, 3...power generation facility, 4...management server, 5...site of water treatment business operator, 12...flow path, 200...water treatment unit, 202...storage unit, 204...sludge treatment unit, 206...solid fuel generation unit, 208...hopper, 210...storage level detection unit, 212...terminal, 300...hopper, 302...incinerator, 304...boiler group, 306...boiler, 308...boiler, 310...boiler, 312...dust collector, 314...cooler, 316...blower, 318...chimney, 320...power generation unit, 322...condensate supply unit, 324...heat medium supply unit, 326...remaining amount detection unit, 328...terminal, 400...water treatment facility information receiving unit, 402...power generation facility information receiving unit, 404...control unit, 406...storage unit, 408...water treatment facility information transmitting unit, 410...power generation facility information transmitting unit, 2120...receiving unit, 2122...control unit, 2124...storage unit, 2126...transmitting unit, 2128...output unit, 3200...regenerator, 3202...evaporator, 3204...turbine generator, 3206...condenser, 3208...circulating pump, 3210...steam turbine, 3212...condenser, 3280...receiving unit, 3282...control unit, 3284...storage unit, 3286...transmitting unit, 3288...output unit, 3288a...storage level output unit, 3288b...input amount output unit, NW...network

Claims (6)

A water treatment facility owned by a water treatment company and installed on the premises of the water treatment company, a power generation facility owned by a power generation company and installed on the premises of the water treatment company , and a management server ,
The water treatment facility comprises:
a solid fuel production section that dries the dewatered sludge using a heat medium supplied from the power generation facility to produce sludge fuel;
A storage section for storing treated water obtained by treating water that has flowed into the water treatment facility;
having
The power generation facility includes:
a power generation unit that generates electricity by utilizing heat generated by burning the sludge fuel as fuel;
A first boiler that uses heat generated by the combustion to heat a heat medium to be supplied to the water treatment facility;
a heat medium supply unit that supplies the heat medium heated in the first boiler to the water treatment facility;
a condenser that condenses the heat medium that has passed through the turbine of the power generation section by cooling it with the treated water;
a return flow path that returns the treated water used for cooling in the condenser to the storage section;
having
The management server includes:
a water treatment facility information receiving unit that receives, from a terminal of the water treatment facility, treatment plan data indicating a schedule for sludge treatment at the water treatment facility and information indicating a storage level of a hopper that stores the generated sludge fuel;
a power generation facility information receiving unit that receives information indicating a remaining amount of the sludge fuel material in the power generation facility from a terminal of the power generation facility;
a control unit that calculates an amount of sludge fuel that can be accepted at the power generation facility based on the received information indicating the remaining amount of the sludge fuel, and calculates an input amount of fuel to be used at the power generation facility based on the received treatment plan data and the information indicating the storage level;
a water treatment facility information transmission unit that transmits information indicating the calculated amount of water received to a terminal of the water treatment facility;
a power generation facility information transmission unit that transmits information indicating the calculated received amount and input amount, and information indicating the received treatment plan data and storage level to a terminal of the power generation facility;
A water treatment system comprising: The water treatment facility comprises:
A storage level detection unit for detecting the storage level,
The power generation facility includes:
A first receiving unit that receives the detection result of the storage level;
A first output unit that outputs the received detection result of the storage level;
The water treatment system of claim 1 . The power generation unit is capable of generating power by utilizing heat generated by burning the sludge fuel and a biomass fuel as fuel,
The power generation facility includes:
a second output unit that outputs the input amounts of the sludge fuel material and the biomass fuel used as fuel based on the treatment plan data or the detection result of the storage level;
The water treatment system of claim 2 . The water treatment facility comprises:
A second receiving unit that receives the accepted amount;
A third output unit that outputs the received amount of acceptance;
The water treatment system of claim 1 . The power generation facility includes:
a second boiler that uses heat generated by the combustion to heat a heat medium used for heating the heat medium before passing through the turbine;
The water treatment system according to any one of claims 1 to 4 , comprising: A water treatment method in a water treatment system having a water treatment facility owned by a water treatment company and installed on the premises of the water treatment company, a power generation facility owned by a power generation company and installed on the premises of the water treatment company , and a management server ,
In the water treatment facility,
A solid fuel production unit dries the dewatered sludge using a heat medium supplied from the power generation facility to produce sludge fuel;
A storage unit stores treated water obtained by treating water that has flowed into the water treatment facility;
Including,
In the power generation facility,
a power generation unit that generates power by utilizing heat generated by burning the sludge fuel as fuel;
A first boiler heats a heat medium supplied to the water treatment facility using heat generated by the combustion;
a heat medium supplying unit supplying the heat medium heated in the first boiler to the water treatment facility;
a condenser that condenses the heat medium that has passed through a turbine of the power generation unit by cooling it with the treated water;
A return flow path returns the treated water used for cooling in the condenser to the storage section;
Including,
In the management server,
a water treatment facility information receiving unit receiving, from a terminal of the water treatment facility, treatment plan data indicating a schedule for sludge treatment at the water treatment facility and information indicating a storage level of a hopper that stores the generated sludge fuel;
a power generation facility information receiving unit receiving information indicating a remaining amount of the sludge fuel material at the power generation facility from a terminal of the power generation facility;
A control unit calculates an amount of sludge fuel that can be accepted at the power generation facility based on the received information indicating the remaining amount of the sludge fuel, and calculates an input amount of fuel to be used at the power generation facility based on the received treatment plan data and the information indicating the storage level;
a water treatment facility information transmission unit transmitting information indicating the calculated amount of received water to a terminal of the water treatment facility;
a power generation facility information transmission unit transmitting information indicating the calculated accepted amount and input amount, and information indicating the received treatment plan data and the storage level to a terminal of the power generation facility;
A water treatment method comprising:

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