JP6856419B2 - Condensed water treatment system - Google Patents

Description

The present disclosure relates to a condensed water treatment system for treating condensed water separated from combustion gas discharged from a combustion gas generator such as a turbine, a boiler, and an engine.

Conventionally, in a thermal power plant having a boiler and a steam turbine, the combustion gas energy generated by burning fuel and air in the combustion chamber (combustor) of the boiler is transmitted to water in the heat transfer part of the boiler to generate a high temperature. High-pressure steam is generated, and the energy of this steam is converted into useful mechanical power by the steam turbine. In such a thermal power plant, combustion gas is generated by combustion in the combustion chamber of the boiler. Since this combustion gas has thermal energy due to combustion in the combustion chamber, the thermal energy is recovered in the heat exchanger. The heat energy recovered in the heat exchanger is used for preheating the boiler water supply. During heat recovery in this heat exchanger, when the temperature at the outlet of the heat exchanger becomes equal to or lower than the condensation point of water, condensed water is generated, and the heat exchanger separates the condensed water from the combustion gas.

Condensed water separated from combustion gas is discharged as it is when its water quality meets the drainage standard, and when its water quality does not meet the wastewater standard, it is discharged after neutralization treatment. However, since the discharge treatment of condensed water is costly, it may be used for water supply to a boiler, for example, after collecting CO2 in a deaerator (for example, Patent Documents 1 to 1). 3).

More specifically, Patent Document 1 describes, in a thermal power plant, an exhaust heat boiler that collects exhaust gas discharged from a gas turbine, a condenser that condenses moisture in the exhaust gas of the exhaust heat boiler, and a condenser. It is disclosed that the gas-water separation device that separates the condensed condensed water and other gas elements and connects them so as to supply the condensed water to the exhaust heat boiler is provided.

Further, Patent Document 2 describes a steam reformer that reforms steam of a hydrocarbon-based fuel, a combustor that is a heating source for steam reforming, a boiler that generates steam for steam reforming, and steam. It is equipped with an off-gas from the reformer and a water separator that separates water from the exhaust gas from the combustor and the boiler, and the drain water recovered by the water separator is acidic, so the boiler is passed through the neutralizer. It is disclosed that it is supplied as water for steam generation.

Further, Patent Document 3 describes a turbine driven by combustion gas generated by combustion of a combustor, an exhaust heat recovery boiler that uses exhaust gas generated by the turbine as heat for steam production, and an exhaust heat recovery boiler after passing through. It is disclosed that a condenser that separates exhaust gas into condensed water and carbon dioxide is provided, and a part of the water condensed by the condenser is supplied to an exhaust heat recovery boiler.

Japanese Patent No. 2744090 Japanese Patent No. 5148541 Japanese Patent No. 3110114

However, in general, for boiler water supply in thermal power plants, water whose purity has been increased to pure water by water treatment of industrial water to remove impurities by water purification equipment is used after degassing. Be done. The reason is that the boiler in a thermal power plant is operated under high temperature and high pressure, so if the water used for boiler supply contains even a small amount of impurities, metal oxides will adhere to the heat transfer surface of the boiler, and the boiler will This is because various problems occur in which the boiler efficiency is lowered by inhibiting heat transfer such as corrosion of the auxiliary equipment and sticking of the scale to the superheater or the turbine. Therefore, it is not preferable to use the condensed water separated from the combustion gas as in Patent Documents 1 to 3 for boiler water supply after recovering CO2, because it causes the above-mentioned problems.

In addition, by treating condensed water with a water purification facility like industrial water, the condensed water purified to a water quality that meets the drainage standards can be drained, or the condensed water with improved water quality can be used as a boiler, for example. It may be used as water supply, but if the water purification equipment is excessively purified, the water purification equipment will be wasted, and if the water purification equipment is insufficiently purified. Will lead to the problems mentioned above.

In view of the above circumstances, at least one embodiment of the present invention aims to provide a condensed water treatment system capable of purifying condensed water and suppressing consumption of water purification equipment.

(1) The condensed water treatment system according to at least one embodiment of the present invention is
A condensed water treatment system for treating condensed water separated from the combustion gas discharged from the combustion gas generator.
A low-temperature exhaust heat recovery device that separates the condensed water from the combustion gas by recovering thermal energy from the combustion gas.
A water purification unit including at least one water purification facility for purifying the condensed water, and a water purification unit.
A water quality measuring device for measuring the water quality of the condensed water discharged from the low temperature waste heat recovery device and before being transferred to the water purification unit.
A control unit for controlling the transfer destination of the condensed water to the water purification unit is provided according to the measurement result of the water quality measuring device.

According to the configuration of (1) above, the combustion gas discharged from the combustion gas generator recovers the thermal energy in the low temperature exhaust heat recovery device, and the condensed water is separated. The water quality of this condensed water is measured by a water quality measuring device before being discharged from the low temperature waste heat recovery device and transferred to a water purification unit for purifying the condensed water. The transfer destination of the condensed water to the water purification unit is controlled by the control unit according to the measurement result of the water quality measuring device. Therefore, since the condensed water is subjected to the necessary purification at the transfer destination according to the water quality, the water purification unit and the water purification equipment included therein can purify the condensed water without excess or deficiency. That is, it is possible to prevent insufficient purification of the condensed water or excessive purification of the condensed water by the water purification equipment to consume the water purification equipment. Therefore, according to the above configuration, the condensed water can be purified and the consumption of the water purification equipment can be suppressed.

(2) In some embodiments, in the configuration of (1) above,
The at least one water purification facility is arranged on the downstream side of the first water purification facility and the first water purification facility, and is configured so that the condensed water purified by the first water purification facility flows into the first water purification facility. Including the second water purification facility
The control unit controls the transfer destination of the condensed water to either the upstream of the first water purification facility or the upstream of the second water purification facility according to the measurement result of the water quality measuring device.

According to the configuration of (2) above, the control unit transfers the condensed water to the upstream side of the first water purification facility or the downstream side of the first water purification facility according to the measurement result of the water quality measuring device. Control one of the upstream of a second water purification facility. Therefore, when the quality of the condensed water is good, the condensed water can be directly transferred to the second water purification facility by bypassing the first water purification facility without purifying the condensed water in the first water purification facility. , The consumption of the first water purification facility can be suppressed. Further, the condensed water having good water quality is purified only by purification in the second water purification facility. Further, when the water quality of the condensed water is poor, the condensed water is purified in both the first water purification facility and the second water purification facility, so that the condensed water having a poor water quality can be purified. Therefore, according to the above configuration, the condensed water can be purified and the consumption of the water purification equipment can be suppressed.

(3) In some embodiments, in the configuration of (1) or (2) above,
When the water quality measured by the water quality measuring device exceeds a predetermined purification degree, the control unit controls the transfer destination of the condensed water to the downstream of the water purification unit.
According to the configuration of (3) above, when the water quality measured by the water quality measuring device exceeds the predetermined purification degree, the condensed water is not purified by the water purification unit and bypasses the water purification unit to purify the water. Transferred downstream of the unit. Therefore, it is possible to suppress the consumption of at least one water purification facility included in the water purification unit.

(4) In some embodiments, in the configuration of (2) above,
The at least one water purification facility is configured to control the degree of purification of the condensed water to be purified.
The control unit controls the degree of purification of at least one water purification facility that purifies the condensed water according to the measurement result of the water quality measuring device.

According to the configuration of (4) above, at least one water purification facility is configured to be able to control the degree of purification of the condensed water to be purified, and the control unit purifies the condensed water according to the measurement result of the water quality measurement result. Control the degree of purification of at least one water purification facility configured to control the degree of purification described above. Therefore, when the water quality of the condensed water is good, the purification degree of the condensed water in the water purification equipment whose purification degree can be controlled can be lowered, so that the consumption of the water purification equipment can be suppressed. Further, when the water quality of the condensed water is poor, the degree of purification of the condensed water in the water purification facility can be increased, so that the condensed water having a poor water quality can be purified. Therefore, according to the above configuration, the condensed water can be purified and the consumption of the water purification equipment can be suppressed.

(5) In some embodiments, in the configurations (1) to (4) above,
The water purification unit includes a first water purification unit including at least one water purification facility and at least one water purification facility, is arranged on the downstream side of the first water purification unit, and has the first water purification unit. Includes a second water purification unit configured to allow the condensed water purified by the unit to flow in.
At least one water purification facility of the first water purification unit includes an organic matter treatment device.

According to the configuration of (5) above, the water purification unit is arranged on the downstream side of the first water purification unit and the first water purification unit, and the condensed water purified by the first water purification unit can flow into the first water purification unit. Two water purification units are included, and at least one water purification facility of the first water purification unit includes an organic matter treatment device. Here, the organic matter processing apparatus can remove the organic matter contained in the condensed water. Therefore, the condensed water can be purified by the first water purification unit including the organic matter treatment apparatus. Further, since the organic matter treatment device is the water purification equipment of the first water purification unit on the upstream side of the second water purification unit, the condensed water purified by these water purification equipment has a certain level of water quality or higher. Therefore, it is possible to suppress the consumption of the water purification equipment of the second water purification unit.

(6) In some embodiments, in the configuration of (5) above,
Depending on the measurement result of the water quality measuring device, the control unit sets the transfer destination of the condensed water on the upstream side of the first water purification unit to the first water purification unit or the first water purification unit. Control to one of the downstream.

According to the configuration of (6) above, the condensed water bypasses the first water purification unit or the first water purification unit and purifies the first water according to the water quality of the condensed water measured by the water quality measuring device. Transferred to one of the downstream of the unit. Therefore, when the quality of the condensed water is good, the condensed water is not purified in the water purification equipment of the first water purification unit, but bypasses the water purification equipment of the first water purification unit to purify the first water. Since it can be transferred to the downstream of the unit, it is possible to suppress the consumption of the water purification equipment of the first water purification unit. Further, when the water quality of the condensed water is poor, the condensed water is purified in the water purification equipment of the first water purification unit, so that the condensed water having a poor water quality can be purified. Therefore, according to the above configuration, the condensed water can be purified and the consumption of the water purification equipment can be suppressed.

(7) In some embodiments, in the configuration of (5) or (6) above,
At least one water purification facility of the second water purification unit includes an ion exchange device and a decarboxylation device.
According to the configuration of (7) above, since at least one water purification facility of the second water purification unit includes an ion exchange device and a decarboxylation device, the condensed water can be purified by these devices.

(8) In some embodiments, in the configurations (1) to (4) above,
The water purification unit includes a first water purification unit including at least one water purification facility and at least one water purification facility, is arranged on the downstream side of the first water purification unit, and has the first water purification unit. Includes a second water purification unit configured to allow the condensed water purified by the unit to flow in.
At least one water purification facility of the second water purification unit includes an organic matter treatment device.

According to the configuration of (8) above, the water purification unit is arranged on the downstream side of the first water purification unit and the first water purification unit, and the condensed water purified by the first water purification unit flows into the second. A water purification unit is included, and at least one water purification facility of the second water purification unit includes an organic matter treatment device. Here, the organic matter processing apparatus can remove the organic matter contained in the condensed water. Therefore, the condensed water can be purified by the second water purification unit including the organic matter treatment apparatus. Further, since the organic matter treatment device is the water purification equipment of the second water purification unit on the downstream side of the first water purification unit, the condensed water purified by the second water purification unit has a certain level of water quality or higher. Therefore, it is possible to suppress the consumption of the organic matter processing apparatus.

(9) In some embodiments, in the configuration of (8) above,
The condensed water treatment system further includes a downstream water quality measuring device arranged at a position on the downstream side of the first water purification unit and on the upstream side of the second water purification unit.
The control unit transfers the condensed water on the downstream side of the first water purification unit to the second water purification unit or the second water purification unit according to the measurement result of the downstream water quality measuring device. Control downstream of the unit.

According to the configuration of (9) above, the water quality of condensed water is measured by a downstream water quality measuring device arranged on the downstream side of the first water purification unit and on the upstream side of the second water purification unit. Then, according to the water quality of the condensed water measured by the downstream water quality measuring device, the condensed water is transferred to the downstream of the second water purification unit by bypassing the second water purification unit or the second water purification unit. To. Therefore, when the quality of the condensed water is good, the condensed water is bypassed by the second water purification unit without being purified by the water purification equipment of the second water purification unit, and directly downstream of the second water purification unit. Since it can be transferred, it is possible to suppress the consumption of the water purification equipment of the second water purification unit. Further, when the water quality of the condensed water is poor, the condensed water is purified in the water purification equipment of the second water purification unit, so that the condensed water having a poor water quality can be purified. Therefore, according to the above configuration, the condensed water can be purified and the consumption of the water purification equipment can be suppressed.

(10) In some embodiments, in the configurations (1) to (9) above,
The condensed water treatment system further includes a combustion gas purification device that removes at least one of a hydrocarbon and a nitrogen compound from the combustion gas before the condensed water is separated by the low temperature exhaust heat recovery device.
According to the configuration of (10) above, the condensed water treatment system removes at least one of a hydrocarbon and a nitrogen compound from the combustion gas before the condensed water is separated by the low temperature exhaust heat recovery device. Since the device is provided, at least one of the hydrocarbon compound and the nitrogen compound is removed from the combustion gas. The water quality of the condensed water separated from the combustion gas from which at least one of the hydrocarbon and nitrogen compounds that deteriorates the water quality of the condensed water has been removed is improved. Therefore, since the water quality of the condensed water is improved on the upstream side of the water purification unit, it is possible to suppress the consumption of the water purification equipment of the water purification unit. Therefore, the condensed water can be purified and the consumption of the water purification equipment can be suppressed.

(11) In some embodiments, in the configuration of (10) above,
The condensed water treatment system further includes a high-temperature waste heat recovery device that recovers thermal energy from the combustion gas, which is arranged on the upstream side of the low-temperature waste heat recovery device.
The combustion gas purification device was provided at a position on the upstream side of the high temperature exhaust heat recovery device.
According to the configuration (11) above, the condensed water treatment system is arranged on the upstream side of the low temperature waste heat recovery device, and includes a high temperature waste heat recovery device that recovers thermal energy from the combustion gas, and the high temperature waste heat recovery device is provided. Since the combustion gas purification device is provided on the upstream side of the recovery device, the combustion gas before the thermal energy is recovered by the high temperature exhaust heat recovery device is high temperature, so that the combustion gas purification device efficiently uses hydrocarbons and nitrogen. At least one of the compounds can be removed.

(12) In some embodiments, in the configuration of (10) or (11) above,
The combustion gas purifying device includes at least one of an oxidizing device capable of removing the hydrocarbon from the combustion gas and a denitration device capable of removing the nitrogen compound from the combustion gas. ..
According to the configuration of (12) above, both the oxidizing device and the denitration device are composed of hydrocarbon and nitrogen compounds that lower the quality of the condensed water from the combustion gas before the condensed water is separated by the low temperature exhaust heat recovery device. At least one can be removed. Therefore, the condensed water can be purified and the consumption of the water purification equipment can be suppressed.

(13) In some embodiments, in the configuration of (12) above,
The condensed water treatment system includes a hydrocarbon concentration measuring device for measuring the concentration of the hydrocarbon contained in the combustion gas before being purified by the combustion gas purification device, and a hydrocarbon concentration measuring device before being purified by the combustion gas purification device. A nitrogen compound concentration measuring device for measuring the concentration of the nitrogen compound contained in the combustion gas is further provided.
The combustion gas purifying device includes the oxidizing device and the denitration device.
The control unit controls whether the combustion gas flows into the oxidizing device or bypasses the oxidizing device according to the measurement result of the hydrocarbon concentration measuring device, and also controls the nitrogen compound concentration measuring device. Depending on the measurement result, it is controlled whether the combustion gas flows into the denitration device or bypasses the denitration device.
According to the configuration of (13) above, the condensed water treatment system is composed of a hydrocarbon concentration measuring device for measuring the concentration of hydrocarbons contained in the combustion gas before being purified by the combustion gas purifying device and a combustion gas purifying device. A nitrogen compound concentration measuring device for measuring the concentration of nitrogen compounds contained in the combustion gas before purification is provided, and the combustion gas purifying device includes an oxidizing device and a denitration device. Further, the control unit controls whether to allow the combustion gas to flow into or bypass the oxidizing device according to the measurement result of the hydrocarbon concentration measuring device. In addition, the control unit controls whether the combustion gas flows into the denitration device or bypasses it according to the measurement result of the nitrogen compound concentration measuring device. Therefore, when the concentration of the hydrocarbon or nitrogen compound in the combustion gas is low, the combustion gas can bypass the oxidizing device or the denitration device, so that the consumption of the combustion gas purifying device can be suppressed. Further, when the concentration of the hydrocarbon or nitrogen compound in the combustion gas is high, the combustion gas flows into the oxidizing device or the denitration device, so that the combustion gas can be purified. Therefore, the condensed water can be purified and the consumption of the water purification equipment can be suppressed.

(14) In some embodiments, in the configurations (1) to (9) above,
The condensed water treatment system further includes a high-temperature waste heat recovery device that recovers thermal energy from the combustion gas, which is arranged on the upstream side of the low-temperature waste heat recovery device.
The high temperature exhaust heat recovery device includes a first heat exchanger which is a heat exchanger.
The low temperature exhaust heat recovery device includes a second heat exchanger which is a heat exchanger.
At least one of the first heat exchanger and the second heat exchanger is coated with a catalyst for removing at least one of a hydrocarbon and a nitrogen compound on the heat transfer surface.
According to the configuration of (14) above, the high temperature exhaust heat recovery device includes a first heat exchanger, and the low temperature exhaust heat recovery device includes a second heat exchanger, the first heat exchanger and the second heat exchanger. Since at least one of the above is coated on the heat transfer surface with a catalyst for removing at least one of the hydrocarbon and the nitrogen compound, the combustion gas before the condensed water is separated by the low temperature waste heat recovery device can be used. At least one of the hydrocarbon and the nitrogen compound can be removed. Therefore, the condensed water can be purified and the consumption of the water purification equipment can be suppressed.

(15) In some embodiments, in the configurations (1) to (14) above,
The combustion gas generator includes a boiler and includes a boiler.
The condensed water is supplied to the boiler on the downstream side of the water purification unit.
According to the configuration of (15) above, the combustion gas generator includes a boiler, and the condensed water is supplied to the boiler on the downstream side of the water purification unit, so that the cost generated by draining the condensed water is reduced. be able to.

(16) In some embodiments, in the configurations (1) to (14) above,
The condensed water treatment system further includes a drinking water generation unit that purifies the condensed water to generate drinking water.
According to the configuration of (16) above, the condensed water treatment system includes a drinking water generation unit that purifies the condensed water to generate drinking water. Therefore, after the condensed water is purified by the drinking water generation unit, the drinking water is consumed. Can be used as water.

According to at least one embodiment of the present invention, there is provided a condensed water treatment system capable of purifying condensed water and suppressing consumption of water purification equipment.

It is explanatory drawing for demonstrating the condensed water treatment system which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the control by the control part according to the measurement result of the water quality measuring apparatus in the condensed water treatment system shown in FIG. It is explanatory drawing for demonstrating the condensed water treatment system which concerns on another Embodiment of this invention, and is the figure which included the ozone generator and the ultraviolet irradiation apparatus in the water purification equipment. It is a flowchart which shows an example of the control by the control part according to the measurement result of the water quality measuring apparatus in the condensed water treatment system shown in FIG. It is explanatory drawing for demonstrating the condensed water treatment system which concerns on another Embodiment of this invention, and is the figure which included the oxidation apparatus and activated carbon adsorption apparatus in the water purification equipment. It is a flowchart which shows an example of the control by the control part according to the measurement result of the downstream water quality measuring apparatus in the condensed water treatment system shown in FIG. It is explanatory drawing for demonstrating the condensed water treatment system which concerns on another Embodiment of this invention, and is the figure which expands and shows from the combustion gas generator to the low temperature exhaust heat recovery apparatus. It is explanatory drawing for demonstrating the condensed water treatment system provided with the hydrocarbon concentration measuring apparatus and the nitrogen compound concentration measuring apparatus which concerns on another Embodiment of this invention, and is the low temperature waste heat recovery apparatus from a combustion gas generator. Is an enlarged view showing up to. It is a flowchart which shows an example of the control by the control part according to the measurement result of the hydrocarbon concentration measuring apparatus and the nitrogen compound concentration measuring apparatus in the condensed water treatment system shown in FIG. It is explanatory drawing for demonstrating the condensed water treatment system which concerns on another Embodiment of this invention, and is the figure which shows the high temperature exhaust heat recovery apparatus and the low temperature exhaust heat recovery apparatus in an enlarged manner. It is explanatory drawing for demonstrating the condensed water treatment system provided with the drinking water generation unit which concerns on one Embodiment of this invention.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention to this, but are merely explanatory examples. Absent.
For example, expressions that represent relative or absolute arrangements such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "concentric" or "coaxial" are exact. Not only does it represent such an arrangement, but it also represents a state of relative displacement with tolerances or angles and distances to the extent that the same function can be obtained.
For example, expressions such as "same", "equal", and "homogeneous" that indicate that things are in the same state not only represent exactly the same state, but also have tolerances or differences to the extent that the same function can be obtained. It shall also represent the existing state.
For example, the expression representing a shape such as a quadrangular shape or a cylindrical shape not only represents a shape such as a quadrangular shape or a cylindrical shape in a geometrically strict sense, but also an uneven portion or chamfering within a range where the same effect can be obtained. The shape including the part and the like shall also be represented.
On the other hand, the expressions "equipped", "equipped", "equipped", "included", or "have" one component are not exclusive expressions that exclude the existence of other components.

FIG. 1 is an explanatory diagram for explaining a condensed water treatment system according to an embodiment of the present invention. FIG. 2 is a flowchart showing an example of control by the control unit according to the measurement result of the water quality measuring device in the condensed water treatment system shown in FIG. FIG. 3 is an explanatory diagram for explaining the condensed water treatment system according to another embodiment of the present invention, and is a diagram including an ozone generator and an ultraviolet irradiation device in the water purification equipment. FIG. 4 is a flowchart showing an example of control by the control unit according to the measurement result of the water quality measuring device in the condensed water treatment system shown in FIG. FIG. 5 is an explanatory diagram for explaining a condensed water treatment system according to another embodiment of the present invention, and is a diagram including an oxidizing device and an activated carbon adsorbing device in a water purification facility. FIG. 6 is a flowchart showing an example of control by the control unit according to the measurement result of the downstream water quality measuring device in the condensed water treatment system shown in FIG. FIG. 7 is an explanatory diagram for explaining the condensed water treatment system according to another embodiment of the present invention, and is an enlarged view from a combustion gas generator to a low-temperature exhaust heat recovery device. FIG. 8 is an explanatory diagram for explaining a condensed water treatment system including a hydrocarbon concentration measuring device and a nitrogen compound concentration measuring device according to another embodiment of the present invention, and is a low temperature from a combustion gas generator. It is a figure which shows enlarged to the exhaust heat recovery device. FIG. 9 is a flowchart showing an example of control by the control unit according to the measurement results of the hydrocarbon concentration measuring device and the nitrogen compound concentration measuring device in the condensed water treatment system shown in FIG. FIG. 10 is an explanatory diagram for explaining a condensed water treatment system according to another embodiment of the present invention, and is an enlarged view showing a high-temperature waste heat recovery device and a low-temperature waste heat recovery device. FIG. 11 is an explanatory diagram for explaining a condensed water treatment system including a drinking water generation unit according to an embodiment of the present invention.
Hereinafter, each of the above configurations included in the condensed water treatment system 1 will be described.

In the embodiment shown in FIGS. 1 to 11, the condensed water treatment system 1 includes a combustion gas generator 2, a steam turbine 3, and a feed water heater as shown in FIGS. 1, 3, 5, 7, and 8. 4, a low-pressure feed water heater 5, a condenser 6, and a boiler feed water heater 7 are provided. In the pipeline 8, the combustion gas generator 2, the steam turbine 3, the condenser 4, the low-pressure feed water heater 5, the deaerator 6, and the boiler feed water heater 7 are connected in series in order from the upstream, and the boiler feed water heater is connected. It is formed in a ring shape by connecting the upstream side of the combustion gas generator 2 to the downstream side of 7.

The combustion gas generator 2 (boiler 2a) is supplied with the combustion gas energy generated by mixing the fuel F and the air A supplied from the outside in the combustion chamber and then burning the combustion gas energy in the heat transfer section. It is transmitted to water to generate high temperature and high pressure steam S. Further, the combustion gas generator 2 not only generates high-temperature and high-pressure steam S by combustion in the combustion chamber, but also generates combustion gas Cg. The steam S generated by the combustion in the combustion gas generator 2 flows through the pipeline 8 toward the steam turbine 3 downstream, and the combustion gas Cg flows through the pipeline 9 described later toward the high-temperature exhaust heat recovery device 17 downstream. It flows.

The steam turbine 3 converts the thermal energy of the high-temperature and high-pressure steam S sent from the combustion gas generator 2 into rotary motion (mechanical power) via the turbine (impeller) and the shaft. The condenser 4 generates condensate by cooling and condensing steam S, which is moist steam containing water and water droplets, sent from the steam turbine 3 inside the condenser 4. The low-pressure water supply heater 5 purifies the condensate sent from the condenser 4 via the conduit 8 and the industrial water sent from the water purification unit 20 via the conduit 11 by the water purification facility 21. By raising the temperature of purified water, which is the purified water, the thermal efficiency of the condenser 6 located downstream is increased. The deaerator 6 removes oxygen existing in the boiler feed water containing the condensate and purified water sent from the condensate 4 in order to prevent corrosion of the combustion gas generator 2 located downstream. remove. The boiler feed water heater 7 raises the temperature of the boiler feed water degassed by the deaerator 6 to increase the thermal efficiency of the combustion gas generator 2 located downstream and to which the boiler feed water is supplied.

Further, in the embodiment shown in FIGS. 1 to 11, the condensed water treatment system 1 has a high temperature exhaust heat recovery device 17 and a low temperature as shown in FIGS. It further includes an exhaust heat recovery device 18, a neutralization device 19, and a valve V1 (switchgear). The pipeline 9 is a pipeline for sending the combustion gas Cg, and the combustion gas generator 2, the high temperature exhaust heat recovery device 17, and the low temperature exhaust heat recovery device 18 are connected in series in order from the upstream, and the low temperature exhaust heat recovery device 18 is connected. It is connected to the pipeline 10 via. The pipeline 10 is a pipeline for sending the condensed water Wc separated from the combustion gas Cg by the low temperature exhaust heat recovery device 18, and the low temperature exhaust heat recovery device 18, the neutralizing device 19, and the valve V1 are connected in series in order from the upstream. At the same time, it is connected to the pipe line 12 which is a pipe line for draining the condensed water Wc through the valve V1.

The high temperature exhaust heat recovery device 17 includes a first heat exchanger 17a which is a heat exchanger, and the low temperature exhaust heat recovery device 18 includes a second heat exchanger 18a which is a heat exchanger. Both the high-temperature exhaust heat recovery device 17 and the low-temperature exhaust heat recovery device 18 recover the thermal energy from the combustion gas Cg and give the recovered thermal energy to another object such as boiler water supply. The low-temperature exhaust heat recovery device 18 is arranged on the downstream side of the high-temperature exhaust heat recovery device 17, and further recovers the thermal energy from the combustion gas Cg in which the thermal energy is recovered by the high-temperature exhaust heat recovery device 17. During heat recovery in the low temperature exhaust heat recovery device 18, condensed water Wc is generated when the temperature on the outlet side thereof becomes equal to or lower than the water condensation point. The condensed water Wc is separated from the combustion gas Cg in the low temperature exhaust heat recovery device 18. The neutralizing device 19 neutralizes the condensed water Wc, and since the condensed water Wc separated from the combustion gas Cg is acidic, it is filled with a neutralizing agent such as calcium carbonate-based natural stone.

Further, in the embodiment shown in FIGS. 1 to 11, the condensed water treatment system 1 includes at least one water purification facility 21 for purifying the condensed water Wc as shown in FIGS. 1, 3 and 5. It further includes a water purification unit 20. The water purification equipment 21 includes a water storage tank 21a, a cation tower 21b, a decarboxylation tower 21c, an anion tower 21d, a polisher tower 21e, and organic matter treatment as shown in FIGS. 1, 3, 5, and 11. It includes the device 24 and. Here, the water storage tank 21a stores industrial water Wi. The cation tower 21b is for exchanging and removing cations dissolved in water, and is filled with a cation exchange resin. The decarboxylation tower 21c is for blowing air into water to remove carbon dioxide dissolved in the water and carbon dioxide gas generated by the cation tower 21b. The anion column 21d is for exchanging and removing anions, and is filled with an anion exchange resin. The polisher tower 21e is for exchanging and removing ions that have not been exchanged and removed in the upstream, and is filled with at least an anion exchange resin among the cation exchange resin and the anion exchange resin.

The organic matter processing device 24 includes an ozone generator 21f, an ultraviolet irradiation device 21g, an oxidizing device 21h, an activated carbon adsorption device 21i, and an activated carbon device (not shown), as shown in FIGS. 3 and 5. .. Here, the combustion gas Cg discharged from the combustion gas generator 2 includes partially oxidized hydrocarbons (acetoaldehyde, formaldehyde) generated by combustion in the combustion gas generator 2 and unburned fuel F in the combustion gas generator 2. It may contain unburned oil such as formaldehyde and lubricating oil components. The condensed water Wc separated from the combustion gas Cg containing partially oxidized hydrocarbons and unburned oil by the low-temperature exhaust heat recovery device 18 contains TOC (organic substances such as partially oxidized hydrocarbons and unburned oil). .. It is desirable to remove TOC because it inhibits heat transfer such as adhesion of metal oxides on the heat transfer surface of the combustion gas generator 2 and causes various problems that reduce the efficiency of the combustion gas generator 2. .. The organic matter processing apparatus 24 is for treating the organic matter contained in the condensed water Wc containing the TOC described above.

The ozone generator 21f is a device that generates ozone, which is a substance having a strong oxidizing power exceeding chlorine, as shown in FIG. 3, and decomposes organic substances by ozone sent into condensed water Wc by the device. Therefore, organic substances can be removed from the condensed water Wc. The ultraviolet irradiation device 21g irradiates the condensed water Wc with ultraviolet rays (UV) from an ultraviolet lamp provided along the conduit outside the conduit through which the condensed water Wc passes, as shown in FIG. Since it is an apparatus and the active oxygen generated by irradiation with ultraviolet rays has a strong oxidizing power, the organic matter can be decomposed by this oxidizing power, so that the organic matter can be removed from the condensed water Wc. Further, since ozone and ultraviolet rays can be used in combination by providing both the ozone generator 21f and the ultraviolet irradiation device 21g, active oxygen is more effective than the case where either the ozone generator 21f or the ultraviolet irradiation device 21g is provided. It has a strong oxidizing power because the production of ultraviolet rays is promoted. Therefore, by providing both the ozone generator 21f and the ultraviolet irradiation device 21g, organic substances can be efficiently removed from the condensed water Wc.

Since the oxidizing device 21h includes an oxidation tower and can oxidize the condensed water Wc as shown in FIG. 5, organic substances can be removed from the condensed water Wc. The activated carbon adsorption device 21i includes an activated carbon adsorption tower in which the activated carbon is filled in layers as shown in FIG. 5, and exhibits the ability to adsorb the activated carbon with respect to the condensed water Wc, and the organic matter in the condensed water Wc. Can be adsorbed and removed. The activated carbon device (not shown) contains biological activated carbon, and can remove organic substances from the condensed water Wc by the oxidative decomposition action of the microorganisms propagated in the granular activated carbon and the adsorption action of the activated carbon.

The pipeline 11 connects the water purification unit 20 and the water purifier 4 located downstream of the water purification unit 20 in series, and when the water purification unit 20 includes a plurality of water purification facilities 21, a plurality of water purification units 21 are connected in series. The water purification equipment 21 is connected to each other. For example, in FIG. 1, the water purification unit 20 has a water storage tank 21a, a cation tower 21b, a decarbonization tower 21c, an anion tower 21d, and a polisher tower 21e as water purification equipment 21, and the pipeline 11 has From the upstream, the water storage tank 21a, the cation tower 21b, the decarbonization tower 21c, the anion tower 21d, and the polisher tower 21e are connected in series.

The water storage tank 21a is supplied with industrial water Wi by opening the valve V7 as shown in FIGS. 1, 3, 5, and 11. The industrial water Wi stored in the water storage tank 21a was sent into the pipeline 11 by the pump P and purified into each of the cation tower 21b, the decarboxylation tower 21c, the anion tower 21d and the polisher tower 21e in this order from the upstream. Later, it is supplied to the condenser 4 as the purified water described above.
In some of the following embodiments, each configuration of the condensed water treatment system 1 described above is appropriately provided.

In some embodiments, the condensed water treatment system 1 is separated from the combustion gas Cg discharged from the combustion gas generator 2 as shown in FIGS. 1, 3, 5, 7, 8, 10, 11 It is for treating the condensed water Wc, and is discharged from the above-mentioned low-temperature exhaust heat recovery device 18, the above-mentioned water purification unit 20, and the low-temperature exhaust heat recovery device 18 and before being transferred to the water purification unit 20. A water quality measuring device 22 for measuring the water quality of the condensed water Wc, and a control unit 23 for controlling the transfer destination of the condensed water Wc to the water purification unit 20 according to the measurement result of the water quality measuring device 22. Is.

Further, the condensed water treatment system 1 is provided with a pipeline 13 and valves V2 to V6 (switchgear) as shown in FIGS. The pipeline 13 is connected to the downstream side of the neutralizing device 19 of the pipeline 10 and the upstream side of the valve V1 at one end thereof, and the other ends are branched into a plurality of pipes. Each of the roads 11 is connected to the upstream side of the water purification facility 21 excluding the water storage tank 21a. The valves V2 to V5 are provided in front of the connection portion of the pipeline 11 with each water purification facility 21 in each of the branched pipelines of the pipeline 13. In the valve V6, one of the branched pipelines of the pipeline 13 is connected to the downstream side of the water purification unit 20 of the pipeline 11, and the valve V6 is connected to the downstream side of the water purification unit 20 of the pipeline 13. It is provided in front of the connecting portion.

The water quality measuring device 22 is located on the downstream side of the low temperature exhaust heat recovery device 18 of the pipeline 10 and is arranged on the upstream side of the water purification unit 20, and the water quality of the condensed water Wc at the arranged location, that is, the low temperature. The water quality of the condensed water Wc discharged from the waste heat recovery device 18 and before being transferred to the water purification unit 20 is measured. The water quality of condensed water Wc referred to here is evaluated by using at least one index of water pollution as an index of water quality. Examples of the index of water pollution include turbidity, pH (concentration of turbid hydrogen ions), SS (suspended solids amount), Do (dissolved oxygen amount) and the like.

The water quality measuring device 22 may be any device as long as it can measure the water quality of the condensed water Wc described above and the control unit 23 can control the transfer destination of the condensed water Wc based on the measurement result. The water quality measuring device 22 is, for example, a detector such as an electric conductivity meter, a pH meter, a TOC meter, a carbon dioxide concentration meter, and an aldehyde measuring device, and has one sensor that transmits the measurement result as a signal to the control unit 23. The above may be included, or a part of the condensed water Wc may be sampled as a sample, and a reagent or the like may be added to the sample to measure the water quality of the condensed water Wc. It may include an automated device.

The water quality measuring device 22 is connected to the control unit 23, and the measurement result of the water quality measuring device 22 is sent to the control unit 23. The control unit 23 inputs an input device (input interface) into which various information from each component included in the condensed water treatment system 1 is input, various input information, various programs necessary for performing control, calculation results, and the like. A storable storage device (ROM, RAM), an arithmetic device (CPU) that performs arithmetic processing based on these various information, and various information based on the arithmetic result and the like are output to each component of the condensed water treatment system 1. It is composed of a microcomputer including an output device (output interface), but the general configuration and control will be omitted as appropriate. FIG. 2 shows an example of control by the control unit 23 to control the transfer destination of the condensed water Wc. In FIG. 2, Sq1 is a measured value indicating the water quality measured by the water quality measuring device 22. Further, Q1 is a reference value for determining whether or not the water quality can be introduced in front of the cation tower 21b, and when the measured value Sq1 is equal to or higher than this value, the degree of purification of the condensed water Wc is low. It cannot be introduced in front of the cation tower 21b. Further, Q2 is a reference value for determining whether or not the water quality can be introduced before the decarboxylation tower 21c, Q3 before the anion column 21d, and Q4 before the polisher tower 21e. When the measured value Sq1 is equal to or higher than these values, the degree of purification of the condensed water Wc is low, and the water cannot be introduced in front of the corresponding water purification equipment 21. Further, Q5 is a reference value for determining whether or not the water quality does not need to be introduced into the water purification unit 20. When these reference values are arranged in descending order of the values, they are Q1, Q2, Q3, Q4, and Q5.

Next, the control of the control unit 23 will be described with reference to FIG. First, all the valves V1 to V6 are closed, and the condensed water Wc is stored. When the condensed water Wc reaches a specified amount, the water quality measuring device 22 measures the measured value Sq1 indicating the water quality of the condensed water Wc. The control unit 23 determines and controls the transfer destination of the condensed water Wc to the water purification unit 20 according to the measured value Sq1 which is the measurement result of the water quality measuring device 22. Specifically, when the measured value Sq1 is equal to or higher than the reference value Q1, the condensed water Wc cannot be purified by the water purification unit 20, so that the condensed water Wc passes through the valve V1 opened by the control unit 23 and passes through the pipeline 14 It is transferred to and treated as wastewater. When the measured value Sq1 is less than the reference value Q1 and the reference value Q2 or more, the condensed water Wc is transferred to the front of the cation tower 21b through the valve V2 opened by the control unit 23. Similarly, when the measured value Sq1 is less than the reference value Q2 and the reference value Q3 or more, the condensed water Wc passes through the valve V3 opened by the control unit 23 and the measured value Sq1 is the reference before the decarbonization tower 21c. When the value is less than Q3 and more than the reference value Q4, the measured value Sq1 passes through the valve V4 opened by the control unit 23 and before the anion tower 21d. When the measured value Sq1 is less than the reference value Q4 and more than the reference value Q5, control is performed. They are each transferred to the front of the polisher tower 21e through the valve V5 opened by the portion 23. Then, the condensed water Wc is purified by each water purification facility 21 of the water purification unit 20, and then supplied to the condenser 4 as the above-mentioned purified water, passes through the pipeline 8, and is used for boiler water supply.

According to the above configuration, the heat energy of the combustion gas Cg discharged from the combustion gas generator 2 is recovered by the low temperature exhaust heat recovery device 18, and the condensed water Wc is separated. The water quality of the condensed water Wc is measured by the water quality measuring device 22 before being discharged from the low temperature exhaust heat recovery device 18 and transferred to the water purification unit 20 for purifying the condensed water Wc. The transfer destination of the condensed water Wc to the water purification unit 20 is controlled by the control unit 23 according to the measurement result of the water quality measuring device 22. Therefore, since the condensed water Wc is purified at the transfer destination according to its water quality, the water purification unit 20 and the water purification equipment 21 included therein can purify the condensed water Wc without excess or deficiency. it can. That is, it is possible to prevent the condensed water Wc from being insufficiently purified or the condensed water Wc from being unnecessarily purified by the water purification equipment 21 to consume the water purification equipment 21.

Therefore, according to the above configuration, the condensed water Wc can be purified and the consumption of the water purification equipment 21 can be suppressed.

According to the above-described embodiment, the so-called two-bed, three-tower type water purification unit 20 with a polisher having a cation tower 21b, a decarbonization tower 21c, an anion tower 21d, and a polisher tower 21e as the water purification equipment 21 will be described. However, the water purification unit 20 and the water purification equipment 21 are not limited to this. For example, the water purification unit 20 may include a mixed bed type pure water device, a reverse osmosis membrane treatment device, and the like as the water purification equipment 21.

Further, according to the above-described embodiment, the combustion gas generator 2 has been described by using the boiler 2a as an example, but the combustion gas generator 2 is not limited to the boiler 2a, and the combustion gas Cg is discharged. Anything may be used, for example, a turbine or an engine.

Further, in some other embodiments, as shown in FIG. 1, at least one water purification facility 21 is arranged on the downstream side of the first water purification facility and the first water purification facility, and is the first. 1 The control unit 23 transfers the condensed water Wc according to the measurement result of the water quality measuring device 22, including the second water purification facility configured to allow the condensed water Wc purified by the water purification facility to flow in. The destination is controlled either upstream of the first water purification facility or upstream of the second water purification facility.

In the present embodiment, for example, assuming that the first water purification facility is a cation tower 21b and the second water purification facility is an anion tower 21d, the condensed water Wc is controlled when the measured value Sq1 is less than the reference value Q3. It is transferred in front of the anion tower 21d through the valve V4 opened by the portion 23. When the measured value Sq1 is equal to or higher than the reference value Q3, the measured value Sq1 passes through the valve V2 opened by the control unit 23 and is transferred to the front of the cation tower 21b.

According to the above configuration, the control unit 23 sets the transfer destination of the condensed water Wc to the upstream side of the first water purification facility or the downstream side of the first water purification facility according to the measurement result of the water quality measuring device 22. Determine and control one of the upstream of a second water purification facility. Therefore, when the water quality of the condensed water Wc is good, it is possible to bypass the first water purification facility and directly transfer it to the second water purification facility without purifying the condensed water Wc in the first water purification facility. Therefore, it is possible to suppress the consumption of the first water purification facility. Further, the condensed water Wc having good water quality is purified only by purification in the second water purification facility. Further, when the water quality of the condensed water Wc is poor, the condensed water Wc is purified in both the first water purification facility and the second water purification facility, so that the condensed water Wc having a poor water quality can be purified. Therefore, according to the above configuration, the condensed water Wc can be purified and the consumption of the water purification equipment 21 can be suppressed.

Further, in some other embodiments, when the water quality measured by the water quality measuring device 22 exceeds a predetermined purification degree, the control unit 23 transfers the condensed water Wc to the downstream of the water purification unit 20. To control. Here, the case where the water quality measured by the water quality measuring device 22 exceeds the predetermined purification degree is the case where the measured value Sq1 measured by the water quality measuring device 22 in FIG. 2 is smaller than the reference value Q5 of the water quality that does not require water treatment. In this case, the valve V6 is opened and the condensed water Wc is transferred downstream of the water purification unit 20.

According to the above configuration, when the water quality measured by the water quality measuring device 22 exceeds the predetermined purification degree, the condensed water Wc is not purified by the water purification unit 20 and bypasses the water purification unit 20. It is transferred downstream of the purification unit 20. Therefore, it is possible to suppress the consumption of at least one water purification facility 21 included in the water purification unit 20.

Further, in some other embodiments, at least one water purification facility 21 is configured to be able to control the degree of purification of the condensed water Wc to be purified, and the control unit 23 is configured according to the measurement result of the water quality measuring device 22. , The degree of purification of at least one water purification facility 21 that purifies the condensed water Wc is controlled.

The water purification equipment 21 configured to be controllable includes, for example, the amount and treatment time of chemicals for regeneration treatment in the cation tower 21b, the anion tower 21d and the polisher tower 21e, and the amount of air blown into the decarbonization tower 21c. It refers to a water purification facility 21 capable of adjusting factors related to the degree of purification, such as the timing, the ozone concentration in the ozone generator 21f, and the ultraviolet irradiation intensity in the ultraviolet irradiation device 21g. Further, in the water purification facility 21 configured to be controllable, for example, a plurality of cation towers 21b having different purification performances are arranged, and the condensed water Wc can be transferred to an appropriate cation tower 21b. Is also included.

Then, the control unit 23 controls the degree of purification of at least one water purification facility 21 that purifies the condensed water Wc according to the measurement result of the water quality measuring device 22. To control the degree of purification of the water purification equipment 21, for example, in FIG. 2, when the measured value Sq1 is less than the reference value Q1 and the reference value Q2 or more, the condensed water Wc is transferred to the front of the cation tower 21b and the cation. Purification is performed in the tower 21b, and at this time, the degree of purification of the cation tower 21b is controlled by the control unit 23. That is, the control unit 23 increases the purification degree of the cation tower 21b with respect to the condensed water Wc having a water quality close to the reference value Q1, while cation is provided with respect to the condensed water Wc having a water quality close to the reference value Q2. The degree of purification of the tower 21b is lowered.

According to the above configuration, at least one water purification facility 21 is configured to be able to control the degree of purification of the condensed water Wc to be purified, and the control unit 23 is configured to control the degree of purification of the condensed water Wc according to the measurement result of the water quality measuring device 22. The purification degree of at least one water purification equipment 21 configured to control the above-mentioned purification degree is controlled. Therefore, when the water quality of the condensed water Wc is good, the purification degree of the condensed water Wc in the water purification equipment 21 whose purification degree can be controlled can be lowered, so that the consumption of the water purification equipment 21 can be suppressed. it can. Further, when the water quality of the condensed water Wc is poor, the degree of purification of the condensed water Wc in the water purification equipment 21 can be increased, so that the condensed water Wc having a poor water quality can be purified. Therefore, according to the above configuration, the condensed water Wc can be purified and the consumption of the water purification equipment 21 can be suppressed.

Further, in some other embodiments, as shown in FIG. 3, the water purification unit 20 includes a first water purification unit 20a including at least one water purification facility 21 and at least one water purification facility 21. The first water includes the second water purification unit 20b, which is arranged on the downstream side of the first water purification unit 20a and is configured so that the condensed water purified by the first water purification unit 20a can flow in. At least one water purification facility 21 of the purification unit 20a includes an organic matter treatment device 24.

Further, the condensed water treatment system 1 is provided with a pipeline 14 as shown in FIG. One end of the upstream side of the pipeline 14 is the downstream side of the low temperature exhaust heat recovery device 18 of the pipeline 13, and is connected to the upstream side of the second water purification unit 20b, and ozone is sequentially formed from the upstream side. The generator 21f (organic matter treatment device 24) and the ultraviolet irradiation device 21g (organic matter treatment device 24) are connected in series. The pipeline 14 on the downstream side of the ultraviolet irradiation device 21g is on the downstream side of the connection portion of the pipeline 13 with the above-mentioned pipeline 14, and is connected to the upstream side of the second water purification unit 20b.

The condensed water treatment system 1 is provided with valves V8 to V10 (switchgear) as shown in FIGS. 3 and 4. The valve V8 is provided on the downstream side of one end of the upstream side connected to the pipeline 13 and on the upstream side of the ozone generator 21f of the pipeline 14. The valve V9 is provided on the downstream side of the connecting portion of the pipeline 13 with one end on the upstream side of the pipeline 14 and on the upstream side of the connecting portion with the pipeline 14 on the downstream side of the ultraviolet irradiation device 21g. .. The valve V10 is provided on the downstream side of the ozone generator 21f and on the upstream side of the ultraviolet irradiation device 21g in the pipeline 14.

Further, the condensed water treatment system 1 is provided with a pipeline 15 as shown in FIG. One end of the upstream side of the pipeline 15 is connected to the valve V10, and one end of the downstream side of the pipeline 15 is downstream of the connection portion of the pipeline 13 with the downstream pipeline 14 of the ultraviolet irradiation device 21g. It is connected to the upstream side of the second water purification unit 20b.

According to the above configuration, the water purification unit 20 is arranged on the downstream side of the first water purification unit 20a and the first water purification unit 20a, and the condensed water Wc purified by the first water purification unit 20a can flow into the water purification unit 20. The second water purification unit 20b is included, and at least one water purification facility 21 of the first water purification unit 20a includes an organic matter treatment device 24. Here, the organic matter processing apparatus 24 can remove the organic matter contained in the condensed water Wc. Therefore, the condensed water Wc can be purified by the first water purification unit 20a including the organic matter treatment device 24. Further, since the organic matter treatment device 24 is a water purification facility of the first water purification unit 20a on the upstream side of the second water purification unit 20b, the condensed water Wc purified by these water purification facilities 21 is equal to or higher than a certain level. Since it has water quality, it is possible to suppress the consumption of the water purification equipment of the second water purification unit 20b.

According to the above-described embodiment, the first water purification unit 20a in FIG. 3 includes an ozone generator 21f and an ultraviolet irradiation device 21g, but the first water purification unit 20a includes an ozone generator 21f. And only one of the ultraviolet irradiation device 21g may be included, or the organic substance processing device 24 other than the ozone generator 21f and the ultraviolet irradiation device 21g may be included.

Further, in the condensed water treatment system 1 provided only with the water purification unit 20 not including the organic matter treatment apparatus 24, the organic matter contained in the condensed water Wc cannot be sufficiently treated, so that the amount of the organic matter contained in the condensed water Wc cannot be treated. When organic matter is contained, the condensed water Wc is treated as waste water.

Further, in some other embodiments, the water purification unit 20 as shown in FIG. 3 includes the above-mentioned first water purification unit 20a and the above-mentioned second water purification unit 20b, and is a control unit. According to the measurement result of the water quality measuring device 22, the transfer destination of the condensed water Wc on the upstream side of the first water purification unit 20a is the transfer destination of the first water purification unit 20a or the downstream of the first water purification unit 20a. Control to either.

The water quality measuring device 22 in the present embodiment can measure the water quality of the condensed water Wc using at least TOC as one of the indexes of water pollution, and the control unit 23 determines the transfer destination of the condensed water Wc based on the measurement result. Anything that can be done is sufficient.

FIG. 4 shows an example of control by the control unit 23 to control the transfer destination of the condensed water Wc. In FIG. 4, Sq2 is a measured value indicating the water quality measured by the water quality measuring device 22 using at least TOC as one of the indexes of water pollution. Further, Q6 is a reference value for determining whether or not the water quality does not need to be introduced into the ultraviolet irradiation device 21g, and Q7 is a reference value for determining whether or not the water quality does not need to be introduced into the ozone generator 21f. is there. When the measured value Sq2 is smaller than these reference values, the degree of purification of the condensed water Wc is high, and it is not necessary to introduce the corresponding first water purification unit 20a into the water purification equipment 21. These reference values are Q6 and Q7 when arranged in descending order of the values.

Next, the control of the control unit 23 will be described with reference to FIG. First, the water quality measuring device 22 measures the measured value Sq2 indicating the water quality of the condensed water Wc. The control unit 23 determines and controls the transfer destination of the condensed water Wc to the first water purification unit 20a according to the measured value Sq2 which is the measurement result of the water quality measuring device 22. Specifically, when the measured value Sq2 is equal to or higher than the reference value Q6, the condensed water Wc is transferred to the front of the ozone generator 21f through the valve V8 opened by the control unit 23. Then, after purification by the ozone generator 21f, the condensed water Wc is transferred to the front of the ultraviolet irradiation device 21g by passing through the valve V10 leading to the conduit 14 provided with the ultraviolet irradiation device 21g by the control unit 23, and is transferred to the front of the ultraviolet irradiation device 21g. Purified by 21g. Further, when the measured value Sq2 is less than the reference value Q6 and the reference value Q7 or more, the condensed water Wc passes through the valve V8 opened by the control unit 23 and is transferred to the front of the ozone generator 21f. Then, after purification by the ozone generator 21f, the condensed water Wc is transferred to the downstream of the first water purification unit 20a through the valve V10 leading to the pipeline 15. Further, when the measured value Sq2 is less than the reference value Q7, the condensed water Wc is transferred to the downstream of the first water purification unit 20a through the valve V9 opened by the control unit 23.

According to the above configuration, the condensed water Wc bypasses the first water purification unit 20a or the first water purification unit 20a according to the water quality of the condensed water Wc measured by the water quality measuring device 22. It is transferred to any of the downstream of the water purification unit 20a. Therefore, when the water quality of the condensed water Wc is good, the water of the first water purification unit 20a is not purified by the water purification equipment 21 (organic substance treatment device 24) of the first water purification unit 20a. Since it can be transferred to the downstream of the first water purification unit 20a by bypassing the purification equipment 21, it is possible to suppress the consumption of the water purification equipment 21 of the first water purification unit 20a. Further, when the water quality of the condensed water Wc is poor, the condensed water Wc is purified by the water purification equipment 21 of the first water purification unit 20a, so that the condensed water Wc having a poor water quality can be purified. Therefore, according to the above configuration, the condensed water Wc can be purified and the consumption of the water purification equipment 21 can be suppressed.

Further, in some other embodiments, at least one water purification facility 21 of the second water purification unit 20b, as shown in FIG. 3, includes an ion exchange device and a decarboxylation device. Here, the ion exchange device includes a cation tower 21b, an anion tower 21d, and a polisher tower 21e, and the decarboxylation device includes a decarboxylation tower 21c.

According to the above configuration, since at least one water purification facility 21 of the second water purification unit 20b includes an ion exchange device and a decarboxylation device, the condensed water Wc can be purified by these devices.

Further, in some other embodiments, as shown in FIG. 5, the water purification unit 20 includes a first water purification unit 20c including at least one water purification facility 21 and at least one water purification facility 21. The second water purification unit 20d, which is arranged on the downstream side of the first water purification unit 20c and is configured so that the condensed water Wc purified by the first water purification unit 20c can flow in, is included. At least one water purification facility 21 of the water purification unit 20d includes an organic substance treatment device 24.

Further, the condensed water treatment system 1 is provided with a pipeline 16 and valves V11 and V12 (switchgear) as shown in FIGS. 5 and 6. One end of the upstream side of the pipeline 16 is the downstream side of the first water purification unit 20c of the pipeline 11, and is connected to the upstream side of the condenser 4, and the oxidizing device 21h is sequentially connected from the upstream side. (Organic matter treatment device 24) and activated carbon adsorption device 21i (organic matter treatment device 24) are connected in series. The pipeline 16 on the downstream side of the activated carbon adsorption device 21i is connected to the condenser 4. The valve V11 is provided on the downstream side of the connection portion of the pipeline 16 with the conduit 11 and on the upstream side of the oxidizing device 21h. The valve V12 is provided on the downstream side of the connection portion of the pipeline 11 with the conduit 16 and on the upstream side of the condenser 4.

According to the above configuration, the water purification unit 20 is arranged on the downstream side of the first water purification unit 20c and the first water purification unit 20c, and the condensed water Wc purified by the first water purification unit 20c flows into the water purification unit 20. The second water purification unit 20d is included, and at least one water purification facility 21 of the second water purification unit 20d includes an organic matter treatment device 24. Here, the organic matter processing apparatus 24 can remove the organic matter contained in the condensed water Wc. Therefore, the condensed water Wc can be purified by the second water purification unit 20d including the organic matter treatment device 24. Further, since the organic matter treatment device 24 is the water purification facility 21 of the second water purification unit 20d on the downstream side of the first water purification unit 20c, the condensed water Wc purified by the second water purification unit 20d is equal to or higher than a certain level. Since it has water quality, it is possible to suppress the consumption of the organic matter processing apparatus 24.

According to the above-described embodiment, the second water purification unit 20d in FIG. 5 includes an oxidizing device 21h and an activated carbon adsorption device 21i, but the second water purification unit 20d includes an oxidizing device 21h and activated carbon. It may include only one of the adsorption devices 21i, or may include an organic substance treatment device 24 other than the oxidation device 21h and the activated carbon adsorption device 21i.

Further, in some other embodiments, as shown in FIGS. 5 and 6, the condensed water treatment system 1 is located on the downstream side of the first water purification unit 20c and on the upstream side of the second water purification unit 20d. The downstream water quality measuring device 25 is provided at the position of, and the control unit 23 sets the transfer destination of the condensed water Wc on the downstream side of the first water purification unit 20c according to the measurement result of the downstream water quality measuring device 25. , The second water purification unit 20d, or the downstream of the second water purification unit 20d is controlled.

The downstream water quality measuring device 25 is provided in the middle of the pipeline 11. More specifically, the downstream water quality measuring device 25 is located on the downstream side of the first water purification unit 20c in the pipeline 11, and is arranged on the upstream side of the second water purification unit 20d. The water quality of the condensed water Wc, that is, the water quality of the condensed water Wc on the downstream side of the first water purification unit 20c and before being transferred to the second water purification unit 20d is measured. The water quality of condensed water Wc referred to here is one in which at least one or more indicators of water pollution are evaluated as indicators of water quality, and at least TOC is included as an indicator of water pollution. Examples of indicators of water pollution other than TOC include turbidity, pH (concentration of turbid hydrogen ions), SS (suspended solids amount), Do (dissolved oxygen amount), and the like.

The downstream water quality measuring device 25 can measure the water quality of the condensed water Wc using at least TOC as one of the indexes of water pollution, and the control unit 23 can determine the transfer destination of the condensed water Wc based on the measurement result. Anything that can be done will do. Similar to the water quality measuring device 22, the downstream water quality measuring device 25 is a detector such as an electric conductivity meter, a pH meter, a TOC meter, a carbon dioxide concentration meter, and an aldehyde measuring device, and uses the measurement result as a signal. It may include one or more sensors to be transmitted to the control unit 23, or a part of the condensed water Wc may be sampled as a sample, and a reagent or the like may be added to the sample to improve the water quality of the condensed water Wc. It may include a device for measuring or automating the flow of this measurement.

The downstream water quality measuring device 25 is connected to the control unit 23, and the measurement result of the downstream water quality measuring device 25 is sent to the control unit 23. FIG. 6 shows an example of control by the control unit 23 to control the transfer destination of the condensed water Wc. In FIG. 6, Sq3 is a measured value indicating the water quality measured by the downstream water quality measuring device 25. Further, Q8 is a reference value for determining whether or not the water quality does not need to be introduced into the oxidizing device 21h and the activated carbon adsorption device 21i. When the measured value Sq3 is smaller than this reference value, the degree of purification of the condensed water Wc is high, so that it is not necessary to introduce the second water purification unit 20d into the water purification equipment 21.

Next, the control of the control unit 23 will be described with reference to FIG. First, the measured value Sq3 indicating the water quality of the condensed water Wc is measured by the downstream water quality measuring device 25. The control unit 23 determines and controls the transfer destination of the condensed water Wc to the second water purification unit 20d according to the measured value Sq3 which is the measurement result of the downstream water quality measuring device 25. Specifically, when the measured value Sq3 is equal to or higher than the reference value Q8, the condensed water Wc is transferred to the front of the oxidizing device 21h through the valve V11 opened by the control unit 23. Then, the condensed water Wc is purified by the activated carbon adsorbing device 21i after being purified by the oxidizing device 21h. When the measured value Sq3 is less than the reference value Q8, the condensed water Wc is transferred to the condenser 4 downstream of the second water purification unit 20d through the valve V12 opened by the control unit 23. ..

According to the above configuration, the water quality of the condensed water Wc is measured by the downstream water quality measuring device 25 arranged on the downstream side of the first water purification unit 20c and on the upstream side of the second water purification unit 20d. Then, depending on the water quality of the condensed water Wc measured by the downstream water quality measuring device 25, the condensed water Wc bypasses the second water purification unit 20d or the second water purification unit 20d and the second water purification unit. It is transferred downstream of 20d. Therefore, when the water quality of the condensed water Wc is good, the condensed water Wc is not purified by the water purification equipment 21 of the second water purification unit 20d, but bypasses the second water purification unit 20d to purify the second water. Since it can be directly transferred downstream of the unit 20d, it is possible to suppress the consumption of the water purification equipment 21 of the second water purification unit 20d. Further, when the water quality of the condensed water Wc is poor, the condensed water Wc is purified by the water purification equipment 21 of the second water purification unit 20d, so that the condensed water Wc having a poor water quality can be purified. Therefore, according to the above configuration, the condensed water Wc can be purified and the consumption of the water purification equipment 21 can be suppressed.

Further, in some other embodiments, in each of the above-described embodiments (see FIGS. 1 to 6), the condensed water treatment system 1 is a low-temperature waste heat recovery device 18 as shown in FIGS. 7 and 8. A combustion gas purifying device 26 for removing at least one of a hydrocarbon and a nitrogen compound from the combustion gas Cg before the condensed water Wc is separated is provided.

The combustion gas purifying device 26 includes an oxidizing device 26a and a denitration device 26b as shown in FIGS. 7 and 8. The oxidizing device 26a and the denitration device 26b are provided on the downstream side of the combustion gas generator 2 and on the upstream side of the low temperature exhaust heat recovery device 18 in the pipeline 9, as shown in FIGS. 7 and 8. The oxidizing device 26a uses an oxidation catalyst to oxidize hydrocarbons in the combustion gas Cg to water vapor and carbon dioxide, and carbon monoxide to carbon dioxide, respectively, and the hydrocarbons that cause TOC are extracted from the combustion gas Cg. Can be removed. Further, in the denitration device 26b, in the catalyst layer provided inside the catalyst layer, water and nitrogen are chemically reacted with a reducing agent Ra such as ammonia injected in front of the catalyst layer and a nitrogen compound in the combustion gas Cg. Nitrogen compounds, which are raw materials for wastewater control substances, can be removed from the combustion gas Cg.

According to the above configuration, the condensed water treatment system 1 removes at least one of a hydrocarbon and a nitrogen compound from the combustion gas Cg before the condensed water Wc is separated by the low temperature exhaust heat recovery device 18. Since the purification device 26 is provided, at least one of the hydrocarbon and the nitrogen compound is removed from the combustion gas Cg. The water quality of the condensed water Wc separated from the combustion gas Cg from which at least one of the hydrocarbon and the nitrogen compound that lowers the water quality of the condensed water Wc has been removed is improved. Therefore, since the water quality of the condensed water Wc is improved on the upstream side of the water purification unit 20, it is possible to suppress the consumption of the water purification equipment 21 of the water purification unit 20. Therefore, the condensed water Wc can be purified and the consumption of the water purification equipment 21 can be suppressed.

Note that, in FIGS. 7 and 8, a configuration in which both the oxidizing device 26a and the denitration device 26b are arranged is described, but the present invention is not limited to this, and either the oxidizing device 26a or the denitration device 26b is used. May be arranged.

Further, in some other embodiments, the condensed water treatment system 1 recovers thermal energy from the combustion gas Cg arranged on the upstream side of the low temperature waste heat recovery device 18 as shown in FIGS. 7 and 8. The high-temperature exhaust heat recovery device 17 is provided, and the combustion gas purification device 26 is provided at a position on the upstream side of the high-temperature exhaust heat recovery device 17.

According to the above configuration, the condensed water treatment system 1 is arranged on the upstream side of the low temperature exhaust heat recovery device 18 and includes a high temperature exhaust heat recovery device 17 that recovers thermal energy from the combustion gas Cg, and the high temperature exhaust heat is discharged. Since the combustion gas purification device 26 is provided on the upstream side of the heat recovery device 17, the combustion gas Cg before the thermal energy is recovered by the high temperature exhaust heat recovery device 17 is high temperature, so that the combustion gas purification device 26 is At least one of the hydrocarbon and the nitrogen compound can be efficiently removed.

Further, in some other embodiments, the combustion gas purifying device 26 includes an oxidizing device 26a capable of removing hydrocarbons from the combustion gas Cg and a combustion gas Cg as shown in FIGS. 7 and 8. Includes at least one of the denitration devices 26b, which is capable of removing nitrogen compounds from.

According to the above configuration, both the oxidizing device 26a and the denitration device 26b are hydrocarbons that lower the water quality of the condensed water Wc from the combustion gas Cg before the condensed water Wc is separated by the low temperature exhaust heat recovery device 18. At least one of the nitrogen compounds can be removed. Therefore, the condensed water Wc can be purified and the consumption of the water purification equipment 21 can be suppressed.

Further, in some other embodiments, the condensed water treatment system 1, as shown in FIG. 8, measures the concentration of hydrocarbons contained in the combustion gas Cg before being purified by the combustion gas purification device 26. The hydrocarbon concentration measuring device 27 and the nitrogen compound concentration measuring device 28 for measuring the concentration of the nitrogen compound contained in the combustion gas Cg before being purified by the combustion gas purifying device 26 are provided. Including the oxidizing device 26a and the denitration device 26b, the control unit 23 controls whether the combustion gas Cg flows into the oxidizing device 26a or bypasses the oxidizing device 26a according to the measurement result of the hydrocarbon concentration measuring device 27. In addition, depending on the measurement result of the nitrogen compound concentration measuring device 28, it is controlled whether the combustion gas Cg flows into the denitration device 26b or bypasses the denitration device 26b.

Further, the condensed water treatment system 1 is provided with a pipeline 31 and a pipeline 32 as shown in FIG. One end of the upstream side of the pipeline 31 is the downstream side of the combustion gas generator 2 of the pipeline 9, and the pipeline 31 is connected to the upstream side of the oxidizing device 26a, and one end of the downstream side thereof is the pipeline. 9 is on the downstream side of the oxidizing device 26a and is connected to the upstream side of the denitration device 26b. One end of the pipeline 32 on the upstream side is connected to the pipeline 31, and one end on the downstream side of the pipeline 32 is the downstream side of the denitration device 26b of the pipeline 9, and is upstream of the high temperature exhaust heat recovery device 17. It is connected to the side.

Further, the condensed water treatment system 1 is provided with valves V13 to V16 (switchgear) as shown in FIGS. 8 and 9. The valve V13 is provided on the downstream side of the connecting portion of the pipeline 9 connected to one end on the upstream side of the pipeline 31 and on the upstream side of the oxidizing device 26a. The valve V14 is provided on the upstream side of the connecting portion of the pipeline 31 connected to the pipeline 32. The valve V15 is provided on the downstream side of the connecting portion of the pipeline 9 connected to one end on the downstream side of the pipeline 31 and on the upstream side of the denitration device 26b. The valve V16 is provided in the middle of the pipeline 32.

The hydrocarbon concentration measuring device 27 and the nitrogen compound concentration measuring device 28 are arranged on the downstream side of the combustion gas generator 2 of the pipeline 9 and on the upstream side of the connecting portion connected to one end of the upstream side of the pipeline 31. Has been done. The hydrocarbon concentration measuring device 27 measures the concentration of hydrocarbons contained in the combustion gas Cg at the arranged location, and the nitrogen compound concentration measuring device 28 measures the nitrogen contained in the combustion gas Cg at the arranged location. It measures the concentration of a compound.

The hydrocarbon concentration measuring device 27 and the nitrogen compound concentration measuring device 28 are connected to the control unit 23, and the measurement results of the hydrocarbon concentration measuring device 27 and the nitrogen compound concentration measuring device 28 are sent to the control unit 23. FIG. 9 shows an example of control by the control unit 23 to control the transfer destination of the combustion gas Cg. In FIG. 9, Sq4 is a measured value indicating the concentration of the hydrocarbon measured by the hydrocarbon concentration measuring device 27, and Chc determines whether or not the concentration of the hydrocarbon is a concentration that does not need to be introduced into the oxidizing device 26a. It is a reference value for. Further, Sq5 is a measured value indicating the concentration of the nitrogen compound measured by the nitrogen compound concentration measuring device 28, and Cn is for determining whether or not the concentration of the nitrogen compound is a concentration that does not need to be introduced into the denitration device 26b. This is the reference value.

Next, the control of the control unit 23 will be described with reference to FIG. First, the hydrocarbon concentration measuring device 27 measures the measured value Sq4 indicating the concentration of the hydrocarbon contained in the combustion gas Cg. Further, the nitrogen compound concentration measuring device 28 measures the measured value Sq5 indicating the concentration of the nitrogen compound contained in the combustion gas Cg. The control unit 23 determines whether to allow the combustion gas Cg to flow into the oxidizing device 26a or bypass the oxidizing device 26a according to the measured value Sq4 which is the measurement result of the hydrocarbon concentration measuring device 27, and performs control. Specifically, when the measured value Sq4 is equal to or higher than the reference value Chc, the combustion gas Cg is transferred to the front of the oxidizing device 26a through the valve V13 opened by the control unit 23, and the hydrocarbon is transferred by the oxidizing device 26a. Will be removed. Further, when the measured value Sq4 is less than the reference value Chc, the combustion gas Cg is transferred to the downstream of the oxidizing device 26a through the valve V14 opened by the control unit 23.

Further, the control unit 23 determines whether to allow the combustion gas Cg to flow into the denitration device 26b or bypass the denitration device 26b according to the measured value Sq5 which is the measurement result of the nitrogen compound concentration measuring device 28, and controls the control. Do. Specifically, when the measured value Sq5 is equal to or higher than the reference value Cn, the combustion gas Cg is transferred to the denitration device 26b through the valve V15 opened by the control unit 23, and the reducing agent Ra is added. After that, the nitrogen compound is removed by the denitration device 26b. Further, when the measured value Sq5 is full of the reference value Cn, the combustion gas Cg is transferred to the downstream of the denitration device 26b through the valve V16 opened by the control unit 23.

According to the above configuration, the condensed water treatment system 1 includes a hydrocarbon concentration measuring device 27 for measuring the concentration of hydrocarbons contained in the combustion gas Cg before being purified by the combustion gas purifying device 26, and a combustion gas purifying device. A nitrogen compound concentration measuring device 28 for measuring the concentration of a nitrogen compound contained in the combustion gas Cg before being purified by 26 is provided, and the combustion gas purifying device 26 includes an oxidizing device 26a and a denitration device 26b. Further, the control unit 23 controls whether to allow the combustion gas Cg to flow into or bypass the oxidizing device 26a according to the measurement result of the hydrocarbon concentration measuring device 27. Further, the control unit 23 controls whether to allow the combustion gas Cg to flow into or bypass the denitration device 26b according to the measurement result of the nitrogen compound concentration measuring device 28. Therefore, when the concentration of the hydrocarbon or nitrogen compound in the combustion gas Cg is low, the combustion gas Cg can bypass the oxidizing device 26a and the denitration device 26b, so that the consumption of the combustion gas purification device 26 can be suppressed. Can be done. Further, when the concentration of the hydrocarbon or nitrogen compound in the combustion gas Cg is high, the combustion gas Cg is allowed to flow into the oxidizing device 26a or the denitration device 26b, so that the combustion gas Cg can be purified. Therefore, the condensed water Wc can be purified and the consumption of the water purification equipment 21 can be suppressed.

In the above-described embodiment, the condensed water treatment system 1 includes both the hydrocarbon concentration measuring device 27 and the nitrogen compound concentration measuring device 28, and the control unit 23 is the measurement result of the hydrocarbon concentration measuring device 27. The control according to the above and the control according to the measurement result of the nitrogen compound concentration measuring device 28 have been performed. However, the condensed water treatment system 1 includes the hydrocarbon concentration measuring device 27 and the nitrogen compound concentration measuring device 28. The control unit 23 may be provided with any one of the above, and the control unit 23 may only perform control according to the measurement result of one of the measuring devices provided in the condensed water treatment system 1.

Further, in some other embodiments, in each of the above-described embodiments (see FIGS. 1 to 6), the condensed water treatment system 1 is upstream of the low temperature waste heat recovery device 18 as shown in FIG. A high-temperature exhaust heat recovery device 17 arranged on the side for recovering heat energy from the combustion gas Cg is provided, and the high-temperature exhaust heat recovery device 17 includes a first heat exchanger 17a which is a heat exchanger and recovers low-temperature exhaust heat. The device 18 includes a second heat exchanger 18a, which is a heat exchanger, and at least one of the first heat exchanger 17a and the second heat exchanger 18a removes at least one of the hydrocarbon and the nitrogen compound. The heat transfer catalyst is applied to the heat transfer surfaces 17b and 18b.

The first heat exchanger 17a and the second heat exchanger 18a are provided with a plurality of bent heat transfer tubes as shown in FIG. 10, and the combustion gas Cg is used as cooling water passing through the inside thereof. On the other hand, heat exchange is performed. At least one of the first heat exchanger 17a and the second heat exchanger 18a has an oxidation catalyst Oct for removing hydrocarbons and a denitration catalyst Nc for removing nitrogen compounds via a metal-supporting catalyst such as zeolite. It is applied to the heat transfer surfaces 17b and 18b. Therefore, the hydrocarbons in the combustion gas Cg can be removed by the oxidation catalyst Occ provided on the heat transfer surfaces 17b and 18b of the first heat exchanger 17a and the second heat exchanger 18a, and the heat transfer surface can also be removed. The nitrogen compound in the combustion gas Cg can be removed by the denitration catalyst Nc provided in 17b and 18b.

According to the above configuration, the high temperature exhaust heat recovery device 17 includes a first heat exchanger 17a, and the low temperature exhaust heat recovery device 18 includes a second heat exchanger 18a, and the first heat exchanger 17a and the second heat In at least one of the exchangers 18a, a catalyst for removing at least one of the hydrocarbon and the nitrogen compound is applied to the heat transfer surfaces 17b and 18b, so that the condensed water Wc is separated by the low temperature exhaust heat recovery device 18. At least one of the hydrocarbon and the nitrogen compound can be removed from the combustion gas Cg before the heat exchange. Therefore, the condensed water Wc can be purified and the consumption of the water purification equipment 21 can be suppressed. Further, since at least one of the hydrocarbon and the nitrogen compound can be removed without providing the combustion gas purification device 26 as in the above-described embodiment, it is possible to prevent the condensed water treatment system 1 from becoming large in size. it can.

According to the above-described embodiment, the heat transfer surfaces 17b and 18b of the first heat exchanger 17a and the second heat exchanger 18a are coated with the oxidation catalyst Occ and the denitration catalyst Nc, which are shown in FIG. Oxidation catalyst Occ or denitration catalyst Nc may be applied to the conduit 9 through which the combustion gas Cg passes. Further, in order to promote the reaction by the oxidation catalyst Occ and the denitration catalyst Nc, the heat transfer surfaces 17b and 18b of the first heat exchanger 17a and the second heat exchanger 18a or the conduit 9 through which the combustion gas Cg passes are provided with respect to the conduit 9 through which the combustion gas Cg passes. It may be adapted to irradiate ultraviolet rays.

Further, in some other embodiments, in each of the above-described embodiments (see FIGS. 1 to 8), the condensed water treatment system 1 is as shown in FIG. 1, and the combustion gas generator 2 is a boiler. Condensed water Wc including 2a is supplied to the boiler 2a on the downstream side of the water purification unit 20.

According to the above configuration, the combustion gas generator 2 includes the boiler 2a, and the condensed water Wc is supplied to the boiler 2a on the downstream side of the water purification unit 20, so that the cost generated by draining the condensed water Wc is generated. Can be reduced.

Further, in some other embodiments, in each of the above-described embodiments (see FIGS. 1 to 8), the condensed water treatment system 1 purifies the condensed water Wc and drinks as shown in FIG. A drinking water generation unit 29 that generates water Wd is provided.

The drinking water generation unit 29 includes at least one drinking water generation facility 30. The drinking water generation facility 30 disinfects the condensed water Wc by adding a disinfectant such as chlorine, and then adds a mineral component such as calcium or magnesium for seasoning.

In the condensed water treatment system 1, a valve V17 is provided on the downstream side of the pipeline 12 as shown in FIG. 11, and the valve V17 supplies the environmental water We and the condensed water Wc used as the reclaimed water Wr to the outside. .. Further, the drinking water generation unit 29 is connected to the downstream side of the valve V17 of the pipeline 12. The drinking water generation unit 29 includes at least one water purification facility 21 and at least one drinking water generation facility 30, purifies the condensed water Wc to generate drinking water Wd, and the drinking water Wd is generated. It is supplied to the outside.

Further, in the condensed water treatment system 1, as shown in FIG. 11, a valve V18 is provided on the downstream side of the anion tower 21d and the upstream side of the polisher tower 21e in the pipeline 11, and the pipe is provided through the valve V18. The road 11 is connected to a pipe 33, which is a pipe for supplying the condensed water Wc. A valve V19 is provided on the downstream side of the pipeline 33, and the valve V19 supplies the environmental water We and the condensed water Wc used as the reclaimed water Wr to the outside. Further, the drinking water generation unit 29 is connected to the downstream side of the valve V19 of the pipeline 33. The drinking water generation unit 29 includes at least one drinking water generation facility 30, purifies the condensed water Wc to generate drinking water Wd, and the drinking water Wd is supplied to the outside.

According to the above configuration, the condensed water treatment system 1 includes a drinking water generation unit 29 that purifies the condensed water Wc to generate the drinking water Wd, so that the condensed water Wc is purified by the drinking water generation unit 29. Can be used as drinking water Wd.

According to the above-described embodiment, the drinking water generation unit 29 is connected to the downstream of the pipeline 12 and the pipeline 33, but the drinking water generation unit 29 is connected to another pipeline. You may.

The present invention is not limited to the above-described embodiment, and includes a modified form of the above-described embodiment and a combination of these embodiments as appropriate.

1 Condensed water treatment system 2 Combustion gas generator 2a Boiler 3 Steam turbine 4 Water recovery device 5 Low pressure water supply heater 6 Deaerator 7 Boiler water supply heater 17 High temperature exhaust heat recovery device 17a First heat exchanger 17b Heat transfer surface 18 Low temperature exhaust heat recovery device 18a Second heat exchanger 18b Heat transfer surface 19 Neutralizer 20 Water purification unit 20a, 20c First water purification unit 20b, 20d Second water purification unit 21 Water purification equipment 21a Water supply tank 21b Cationic tower 21c Decarbonization tower 21d Anion tower 21e Polisher tower 21f Ozone generator 21g Ultraviolet irradiation device 21h Oxidation device 21i Activated charcoal adsorption device 22 Water quality measurement device 23 Control unit 24 Organic matter treatment device 25 Downstream water quality measurement device 26 Combustion gas purification device 26a Oxidation device 26b Denitration device 27 Hydrocarbon concentration measuring device 28 Nitrogen compound concentration measuring device 29 Drinking water generation unit 30 Drinking water generation equipment A Air Chc, Cn Reference value Cg Combustion gas F Fuel Nc Denitration catalyst O Oxidation catalyst P Pump Ra Reducing agent S Steam Sq1 , Sq2, Sq3, Sq4, Sq5 Measured value Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 Reference value Wc Condensed water Wd Drinking water We Environmental water Wi Industrial water Wr Regenerated water

Claims (16)

A condensed water treatment system for treating condensed water separated from the combustion gas discharged from the combustion gas generator.
A low-temperature exhaust heat recovery device that separates the condensed water from the combustion gas by recovering thermal energy from the combustion gas.
A water purification unit including at least one water purification facility for purifying the condensed water, and a water purification unit.
A water quality measuring device for measuring the water quality of the condensed water discharged from the low temperature waste heat recovery device and before being transferred to the water purification unit.
A control unit that controls a transfer destination of the condensed water to the water purification unit according to a measurement result of the water quality measuring device is provided.
Condensed water treatment system characterized by that. The at least one water purification facility is arranged on the downstream side of the first water purification facility and the first water purification facility, and is configured so that the condensed water purified by the first water purification facility flows into the first water purification facility. Including the second water purification facility
The control unit controls the transfer destination of the condensed water to either the upstream of the first water purification facility or the upstream of the second water purification facility according to the measurement result of the water quality measuring device. The condensed water treatment system according to claim 1. The control unit is characterized in that when the water quality measured by the water quality measuring device exceeds a predetermined purification degree, the control unit controls the transfer destination of the condensed water to the downstream of the water purification unit. Or the condensed water treatment system according to 2. The at least one water purification facility is configured to control the degree of purification of the condensed water to be purified.
The condensed water treatment system according to claim 2, wherein the control unit controls the degree of purification of at least one water purification facility that purifies the condensed water according to the measurement result of the water quality measuring device. .. The water purification unit includes a first water purification unit including at least one water purification facility and at least one water purification facility, is arranged on the downstream side of the first water purification unit, and has the first water purification unit. Includes a second water purification unit configured to allow the condensed water purified by the unit to flow in.
The condensed water treatment system according to any one of claims 1 to 4, wherein the water purification equipment of the first water purification unit includes an organic matter treatment apparatus. According to the measurement result of the water quality measuring device, the control unit sets the transfer destination of the condensed water on the upstream side of the first water purification unit to the first water purification unit or the first water purification unit. The condensed water treatment system according to claim 5, characterized in that it is controlled to any of the downstream. The condensed water treatment system according to claim 5 or 6, wherein at least one water purification facility of the second water purification unit includes an ion exchange device and a decarboxylation device. The water purification unit includes a first water purification unit including at least one water purification facility and at least one water purification facility, is arranged on the downstream side of the first water purification unit, and has the first water purification unit. Includes a second water purification unit configured to allow the condensed water purified by the unit to flow in.
The condensed water treatment system according to any one of claims 1 to 4, wherein the water purification equipment of the second water purification unit includes an organic matter treatment apparatus. The condensed water treatment system further includes a downstream water quality measuring device arranged at a position on the downstream side of the first water purification unit and on the upstream side of the second water purification unit.
The control unit transfers the condensed water on the downstream side of the first water purification unit to the second water purification unit or the second water purification unit according to the measurement result of the downstream water quality measuring device. The condensed water treatment system according to claim 8, wherein the water treatment system is controlled downstream of the unit. The condensed water treatment system further includes a combustion gas purification device that removes at least one of a hydrocarbon and a nitrogen compound from the combustion gas before the condensed water is separated by the low temperature exhaust heat recovery device. The condensed water treatment system according to any one of claims 1 to 9. The condensed water treatment system further includes a high-temperature waste heat recovery device that recovers thermal energy from the combustion gas, which is arranged on the upstream side of the low-temperature waste heat recovery device.
The condensed water treatment system according to claim 10, wherein the combustion gas purification device is provided at a position on the upstream side of the high-temperature exhaust heat recovery device. The combustion gas purifying device includes at least one of an oxidizing device capable of removing the hydrocarbon from the combustion gas and a denitration device capable of removing the nitrogen compound from the combustion gas. The condensed water treatment system according to claim 10 or 11. The condensed water treatment system includes a hydrocarbon concentration measuring device for measuring the concentration of the hydrocarbon contained in the combustion gas before being purified by the combustion gas purification device, and a hydrocarbon concentration measuring device before being purified by the combustion gas purification device. A nitrogen compound concentration measuring device for measuring the concentration of the nitrogen compound contained in the combustion gas is further provided.
The combustion gas purifying device includes the oxidizing device and the denitration device.
The control unit controls whether the combustion gas flows into the oxidizing device or bypasses the oxidizing device according to the measurement result of the hydrocarbon concentration measuring device, and also controls the nitrogen compound concentration measuring device. The condensed water treatment system according to claim 12, wherein the combustion gas is controlled to flow into the denitration device or bypass the denitration device according to the measurement result. The condensed water treatment system further includes a high-temperature waste heat recovery device that recovers thermal energy from the combustion gas, which is arranged on the upstream side of the low-temperature waste heat recovery device.
The high temperature exhaust heat recovery device includes a first heat exchanger which is a heat exchanger.
The low temperature exhaust heat recovery device includes a second heat exchanger which is a heat exchanger.
A claim that at least one of the first heat exchanger and the second heat exchanger is coated on a heat transfer surface with a catalyst for removing at least one of a hydrocarbon and a nitrogen compound. The condensed water treatment system according to any one of 1 to 9. The combustion gas generator includes a boiler and includes a boiler.
The condensed water treatment system according to any one of claims 1 to 14, wherein the condensed water is supplied to the boiler on the downstream side of the water purification unit. The condensed water treatment system according to any one of claims 1 to 14, further comprising a drinking water generation unit that purifies the condensed water to generate drinking water.

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