Incineration system

Abstract

To provide an incineration system drying an incineration object according to the characteristics of the incineration object.SOLUTION: The incineration system comprises an incineration furnace 1, a cogeneration system 10 generating power using heat energy of a first heat medium heated by waste heat from the incineration furnace, a dryer 5 drying a drying object to be supplied to the incineration furnace using the heat energy of a second heat medium heated by the heat energy of the first heat medium, and an adjustment system of adjusting the temperature of the second heat medium. The adjustment system is disposed in a circulation route circulating the second heat medium between the dryer and the cogeneration system and provided with a heat exchanger 21 exchanging heat between the second heat medium and a fluid, i.e., white-smoke preventive air.SELECTED DRAWING: Figure 2

Description

【Technical Field】 【0001】 The present invention relates to an incineration system. 【Background Art】 【0002】 The exhaust gas of an incinerator that incinerates incineration targets such as sludge (hereinafter, also simply referred to as incineration targets) is high-temperature exhaust gas at about 800 to 900°C. Therefore, for example, an incineration system equipped with a waste heat power generation system that guides this high-temperature exhaust gas to a boiler to generate steam and rotates a generator with a steam turbine has been proposed. 【0003】 And in the incineration system as described above, for example, the thermal energy recovered from the waste heat power generation system is used as a heat source for drying the incineration target before incineration (see Patent Document 1). 【Prior Art Documents】 【Patent Documents】 【0004】 【Patent Document 1】 Japanese Patent Application Laid-Open No. 2017-000983 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 In the incineration system as described above, it is desired to dry the incineration target according to the properties of the incineration target. 【Means for Solving the Problems】 【0006】 To achieve the above objective, the incineration system of the present invention comprises an incinerator, a combined heat and power system that generates electricity using the thermal energy of a first heat medium heated by waste heat from the incinerator, a dryer that dries the material to be incinerated supplied to the incinerator using the thermal energy of a second heat medium heated by the thermal energy of the first heat medium, and a control system that adjusts the temperature of the second heat medium, wherein the control system is provided in a circulation path through which the second heat medium circulates between the dryer and the combined heat and power system, and includes a heat exchanger that exchanges heat between the second heat medium and a fluid, the fluid being white smoke prevention air. [Effects of the Invention] 【0007】 The incineration system of the present invention makes it possible to dry the material to be incinerated in accordance with its properties. [Brief explanation of the drawing] 【0008】 [Figure 1] Figure 1 is a diagram illustrating an example configuration of the incineration system 900 in a comparative example. [Figure 2] Figure 2 is a diagram illustrating an example of the configuration of the incineration system 100 in the first embodiment. [Figure 3] Figure 3 is a diagram illustrating an example of the configuration of the incineration system 200 in the second embodiment. [Figure 4] Figure 4 is a diagram illustrating an example of the configuration of the incineration system 300 in the third embodiment. [Figure 5] Figure 5 is a diagram illustrating an example of the configuration of the incineration system 400 in the fourth embodiment. [Figure 6] Figure 6 is a diagram illustrating an example of the configuration of the incineration system 500 in the fifth embodiment. [Modes for carrying out the invention] 【0009】 Embodiments of the present invention will be described below with reference to the drawings. However, these embodiments do not limit the technical scope of the present invention. 【0010】 [Incineration system 900 in comparative example] First, we will explain the incineration system 900 in the comparative example. Figure 1 is a diagram illustrating an example configuration of the incineration system 900 in the comparative example. Note that the placement and number of lines (piping), pumps, etc. shown below are illustrative and not limiting. 【0011】 As shown in Figure 1, the incineration system 900 includes, for example, an incinerator 1, a heat transfer medium heater 2, a white smoke prevention air preheater 3, a flue gas treatment tower 4, a dryer 5, a scrubber 6, and a combined heat and power system 10. 【0012】 Incinerator 1 is, for example, a fluidized bed incinerator for incinerating sludge. Incinerator 1 has a so-called fluidized bed 1a. The sludge to be incinerated is also called dewatered cake. Hereafter, Incinerator 1 will be described as a fluidized bed incinerator. 【0013】 Specifically, the incinerator 1 incinerates the sludge S supplied from the dryer 5 (hereinafter also referred to as dried sludge S) by using air supplied from the combustion air fan P1 via line L11 as combustion air. Line L11 is piping that connects at least the combustion air fan P1 and the incinerator 1. The incinerator 1 then discharges the exhaust gas G (hereinafter also referred to simply as gas G) generated by incinerating the sludge S into line L2. Line L2 is piping that sequentially connects at least the incinerator 1, the heat transfer medium heater 2, the white smoke prevention air preheater 3, and the flue gas treatment tower 4. 【0014】 The heat transfer heater 2 performs heat exchange between the exhaust gas G supplied from the incinerator 1 via line L2 and the fluid supplied from the combined heat and power system 10 via line L31. Line L31 is piping that connects at least the heat transfer heater 2 and the combined heat and power system 10. Specifically, the heat transfer heater 2 heats the fluid using the exhaust gas G discharged from the incinerator 1 and supplies the heated fluid to the combined heat and power system 10. The heat transfer heater 2 then supplies the exhaust gas G (cooled exhaust gas G) after heating the fluid to the white smoke prevention air preheater 3 via line L2. 【0015】 In the following explanation, we will assume that the fluid supplied to the combined heat and power system 10 is water (water vapor), but other types of fluids (gas or liquids) may also be supplied to the combined heat and power system 10. 【0016】 The white smoke prevention air preheater 3 is a heat exchanger located downstream of the heat transfer heater 2. For example, it uses the thermal energy of the high-temperature exhaust gas G discharged from the incinerator 1 to heat the air supplied from the white smoke prevention air fan P2 via line L12, thereby generating white smoke prevention air A. White smoke prevention air A is heated air used to prevent water vapor in the exhaust gas G discharged from the chimney from appearing as white smoke. Line L12 is piping that sequentially connects at least the white smoke prevention air fan P2, the white smoke prevention air preheater 3, and the flue gas treatment tower 4 (the chimney of the flue gas treatment tower 4). The temperature of the white smoke prevention air A is, for example, around 100-200°C. The temperature of the exhaust gas G that has passed through the white smoke prevention air preheater 3 is, for example, around 200°C. The white smoke prevention air preheater 3 cools the exhaust gas G discharged from the incinerator 1 and supplies the cooled exhaust gas G to the flue gas treatment tower 4 via line L2. 【0017】 The flue gas treatment tower 4 is positioned downstream of the white smoke prevention air preheater 3, and for example, exhaust gas G is introduced from the bottom of the tower. The flue gas treatment tower 4 is then brought into contact with water sprayed from a water spray nozzle (not shown) at the top, thereby removing SO4 from the exhaust gas G. XComponents such as HCl are removed by being contained in water. Further, a chimney for discharging the exhaust gas G cleaned in the flue gas treatment tower 4 to the atmosphere is arranged at the upper part of the flue gas treatment tower 4. 【0018】 The suction machine P3 is, for example, a fan or a blower that sucks the exhaust gas G discharged from the incinerator 1 to the flue gas treatment tower 4, and sends the exhaust gas G cleaned in the flue gas treatment tower 4 to the chimney. 【0019】 The cogeneration system 10 has a function of recovering the thermal energy of the fluid supplied from the heat medium heater 2 and converting it into other energy. For example, it has an evaporator 11, a steam turbine 12, a generator 13, and a condenser 14. In the cogeneration system 10, a heat cycle such as a Rankine cycle or a Kalina cycle is formed by circulating a working medium (not shown) in the line L32. The line L32 is a pipe that connects at least the evaporator 11, the steam turbine 12, and the condenser 14 in sequence, and the working medium circulates through the line L32 by a circulation pump (not shown). Hereinafter, the working medium circulating in the cogeneration system 10 (line L32) is also referred to as the first heat medium. Further, the working medium is also called a working fluid, and is, for example, a low-boiling point medium such as a refrigerant having a boiling point lower than water, an alternative refrigerant, ammonia, or a mixed fluid of ammonia and water, or a high-boiling point medium such as an oil having a boiling point higher than water. Note that the cogeneration system 10 may have, for example, a circulation pump (not shown) for circulating the working medium in the line L32. 【0020】 The evaporator 11 evaporates the working medium by using the thermal energy of the fluid supplied from the heat medium heater 2 via the line L31. 【0021】 The steam turbine 12 is rotated by the steam of the working medium generated by the evaporator 11. Then, the generator 13 connected to the rotation shaft of the steam turbine 12 generates electricity by the rotation of the steam turbine 12. 【0022】 The condenser 14 condenses the gaseous working medium output from the steam turbine 12 using a heat transfer medium (not shown) supplied from the dryer 5 via line L33 (hereinafter also referred to as circulation path L33). Line L33 is piping connecting at least the condenser 14 and the dryer 5, and the heat transfer medium circulates through line L33 by a circulation pump (not shown). The condenser 14 then supplies the condensed working medium to the evaporator 11 by the circulation pump. Hereinafter, the heat transfer medium circulating through line L33 will also be referred to as the second heat transfer medium. 【0023】 The combined heat and power system 10 may also include, for example, a regenerator (not shown) in addition to the evaporator 11, steam turbine 12, generator 13, and condenser 14. The regenerator, for example, exchanges heat between the steam of the first heat medium output from the steam turbine 12 and the first heat medium that has been condensed by the condenser 14, heating the first heat medium supplied from the condenser 14 before supplying it to the evaporator 11. In this case, the condenser 14 condenses the steam of the first heat medium supplied from the regenerator with a liquid second heat medium. 【0024】 Dryer 5 is, for example, a steam dryer, and dries the sludge S (hereinafter also called dewatered sludge S) introduced into the machine by using the thermal energy of the gaseous second heat transfer medium supplied from the condenser 14. Dryer 5 then discharges the dried sludge S (dried sludge S) to line L4 and discharges the air generated by the drying of the sludge S to line L13. Line L4 is piping that connects at least dryer 5 and incinerator 1. Line L13 is piping that sequentially connects at least dryer 5, scrubber 6, and incinerator 1. 【0025】 The scrubber 6 removes water vapor from the air supplied from the dryer 5, for example. Then, the scrubber 6 supplies the air from which the water vapor has been removed as combustion air to the incinerator 1, for example, by using a combustion air fan P4. 【0026】 In other words, if air from which water vapor has not been sufficiently removed is supplied to the incinerator 1, it may result in the need for extra heat to raise the temperature of the incinerator 1, or insufficient heat recovery being performed downstream of the incinerator 1 (for example, in the heat transfer medium heater 2). Therefore, in the incineration system 900, air from which water vapor has been removed by the scrubber 6 is supplied to the incinerator 1. 【0027】 Furthermore, the incineration system 900 also deodorizes the air supplied from the dryer 5 by burning it in the incinerator 1 as combustion air. 【0028】 The outlines of the incineration systems in the first to fifth embodiments described below will be explained. As explained in the comparative example, in an incineration system that uses heat recovered from the combined heat and power system 10 as a heat source for the dryer 5, for example, the amount of heat required for the dryer 5 may fall outside the predetermined heat range (in other words, the heat range assumed at the design stage) due to changes in the properties of the dewatered sludge supplied to the dryer 5. 【0029】 For example, if the amount of heat required for the dryer 5 is lower than a predetermined heat range (in other words, if more heat than necessary is supplied to the dryer), it is desirable to reduce the amount of heat supplied to the dryer 5 and dry the dewatered sludge to a degree suitable for the properties of the dewatered sludge. This is because supplying more heat than necessary to the dryer 5 can damage the dryer 5, or if the dewatered sludge is dried too much, it may cause problems in the subsequent incinerator 1. 【0030】 On the other hand, if the amount of heat required for the dryer 5 is higher than the predetermined heat range (in other words, if less heat is supplied to the dryer than necessary), the dewatered sludge may not dry sufficiently and may not be incinerated sufficiently in the subsequent incinerator 1, requiring a lot of auxiliary combustion. 【0031】 Therefore, the first to fifth embodiments will describe an incineration system that supplies the optimal heat to the dryer 5. 【0032】 [Incineration system 100 in the first embodiment] Next, the incineration system 100 in the first embodiment will be described. Figure 2 is a diagram illustrating an example of the configuration of the incineration system 100 in the first embodiment. 【0033】 As shown in Figure 2, the incineration system 100 includes, for example, an incinerator 1, a heat transfer medium heater 2, a white smoke prevention air preheater 3, a flue gas treatment tower 4, a dryer 5, a scrubber 6, a combined heat and power system 10, and a heat exchanger 21. Only the differences from the incineration system 900 in the comparative example will be explained below. 【0034】 The heat exchanger 21 is, for example, located on the line L33 that supplies the second heat medium from the dryer 5 to the condenser 14, and performs heat exchange between the second heat medium supplied from the dryer 5 and the white smoke prevention air A supplied from the white smoke prevention air preheater 3. Line L33 in the incineration system 100 is a line that sequentially connects the condenser 14, the dryer 5, and the heat exchanger 21, and the second heat medium circulates through it. The heat exchanger 21 then supplies the second heat medium, which has been cooled by heat exchange with the white smoke prevention air A, to the condenser 14. 【0035】 Here, the heat exchanger 21 is installed in a circulation path (e.g., line L33) through which the second heat medium circulates between the dryer 5 and the combined heat and power system 10, and is a heat exchanger that exchanges heat between the second heat medium and a fluid. The heat exchanger 21 functions as a control system that adjusts the temperature of the second heat medium supplied to the dryer 5. This fluid is, for example, white smoke prevention air. 【0036】 Since the second heat medium is cooled by the heat exchanger 21, even if the cooled second heat medium is heated by the condenser 14, the temperature of the second heat medium supplied to the dryer 5 can be lowered compared to when there is no heat exchanger 21 (in other words, when the second heat medium does not pass through the heat exchanger 21). As a result, it is possible to suppress the supply of thermal energy exceeding the required amount to the dryer 5. In addition, since the condenser 14 can cool the first heat medium of the combined heat and power system 10 with the cooled second heat medium, the temperature of the first heat medium can be cooled compared to when there is no heat exchanger 21 (in other words, the first heat medium can be condensed more), and the power generation efficiency of the combined heat and power system 10 can be increased. 【0037】 Next, a system for dynamically controlling the amount of heat supplied to the dryer 5 according to the properties of the dewatered sludge will be described. The properties of the dewatered sludge S include, for example, the water content of the dewatered sludge S, the amount of heat generated by the organic matter contained in the dewatered sludge S, and the ratio of organic matter to inorganic matter contained in the dewatered sludge S. 【0038】 Line L33 is connected to a bypass line L34 (hereinafter also referred to as bypass route L34) that bypasses the heat exchanger 21. Valve V11 is installed on bypass line L34. Line L33 is also connected to a bypass line L35 (hereinafter also referred to as bypass route L35) that bypasses the dryer 5. Valve V12 is installed on bypass line L35. Hereafter, the heat exchanger 21, bypass line L34, bypass line L35, valve V11, and valve V12 will be collectively referred to as the adjustment system. 【0039】 Then, the operator controls the amount of the second heat transfer medium supplied to the heat exchanger 21 by controlling the opening and closing of at least one of valves V11 and V12, based on the properties of the dewatered sludge S measured by an instrument (not shown) installed upstream of the dryer 5. 【0040】 Specifically, we consider cases where the calorific value of organic matter contained in dewatered sludge S is greater than a predetermined threshold, where the moisture content of dewatered sludge S is lower than a predetermined threshold, or where the proportion of organic matter in the ratio of organic matter to inorganic matter in dewatered sludge S is greater than a predetermined proportion. Hereinafter, this case will be described as having good combustion efficiency for dewatered sludge S. When the combustion efficiency of dewatered sludge S is good, it is not necessary to sufficiently dry the dewatered sludge S in the dryer 5. 【0041】 First, the operator measures the properties of the dewatered sludge S, for example. Then, if the operator determines from the measurement results that the combustion efficiency of the dewatered sludge S is good (in other words, if the operator determines that it is not necessary to sufficiently dry the dewatered sludge S in the dryer 5, and that it is not appropriate to supply all of the thermal energy contained in the second heat medium supplied from the condenser 14 to the dryer 5), the operator controls the closing of valve V11 to supply the second heat medium to the heat exchanger 21, transferring a portion of the thermal energy contained in the second heat medium to the white smoke prevention air A, thereby reducing the amount of thermal energy supplied to the dryer 5. In this case, the operator can further reduce the amount of thermal energy supplied to the dryer 5 by controlling the opening of valve V12, for example. 【0042】 As a result, the incineration system 100 in this embodiment can prevent the dryer 5 from being damaged by supplying more thermal energy than is necessary for drying the dewatered sludge S. Furthermore, the incineration system 100 can prevent malfunctions in the incineration of the incinerator 1 caused by over-drying the dewatered sludge S. 【0043】 Furthermore, the operator may, for example, control the opening and closing of valves V11 and V12 based on the properties of the dried sludge S measured by an instrument (not shown) installed downstream of the dryer 5 and upstream of the incinerator 1 (line L4). 【0044】 Furthermore, the incineration system 100 may have a control device (not shown) that controls the amount of thermal energy supplied to the dryer 5 by, for example, controlling the opening and closing of valves V11 and V12. The control device is, for example, a computer having a CPU (Central Computing Unit) and memory. The control device may also automatically control the opening and closing of valves V11 and V12 based on, for example, the properties of the dewatered sludge S. 【0045】 Specifically, the control device may, for example, control the amount of thermal energy supplied to the dryer 5 by closing valve V11 and opening valve V12 when the moisture content of the dewatered sludge S is lower than a predetermined threshold. More specifically, the control device may control the closing of valve V11 and the opening of valve V12 so that the amount of thermal energy supplied to the dryer 5 decreases as the moisture content of the dewatered sludge S decreases. 【0046】 Furthermore, the incineration system 100 may also include, for example, a cooling tower (not shown) between the white smoke prevention air preheater 3 and the flue gas treatment tower 4 to further cool the exhaust gas G supplied from the white smoke prevention air preheater 3. In addition, the incineration system 100 may also include, for example, a dust collector (not shown) between the white smoke prevention air preheater 3 and the flue gas treatment tower 4 to remove (dust-remove) soot from the exhaust gas G supplied from the cooling tower. 【0047】 Furthermore, the above example described a case where the dryer 5 is a steam dryer and the second heat transfer medium circulating between the dryer 5 and the condenser 14 (line L33) is, for example, water (water vapor). However, the explanation is not limited to this. Specifically, for example, the dryer 5 may be a heat transfer oil dryer, and heat transfer oil may circulate between the dryer 5 and the condenser 14. 【0048】 Furthermore, in the above example, the case in which the heat exchanger 21 is located on the line L33 that supplies the second heat medium from the dryer 5 to the condenser 14 was described. However, the heat exchanger 21 may also be located on the line L33 that supplies the second heat medium from the condenser 14 to the dryer 5. 【0049】 [Incineration system 200 in the second embodiment] Next, we will describe the incineration system 200 in the second embodiment. Figure 3 is a diagram illustrating an example of the configuration of the incineration system 200 in the second embodiment. In the following, we will only describe the differences from the incineration system 900 in the comparative example. 【0050】 As shown in Figure 3, the incineration system 200 includes, for example, an incinerator 1, a heat transfer medium heater 2, a white smoke prevention air preheater 3, a flue gas treatment tower 4, a dryer 5, a scrubber 6, a combined heat and power system 10, and a heat exchanger 22. 【0051】 The heat exchanger 22 is, for example, located on the line L33 that supplies the second heat medium from the condenser 14 to the dryer 5, and performs heat exchange between the second heat medium supplied from the condenser 14 and the exhaust gas G supplied from the heat medium heater 2. Line L33 in the incineration system 200 is a line that connects the dryer 5, the condenser 14, and the heat exchanger 22. The heat exchanger 22 supplies the gaseous second heat medium, which has been heated by heat exchange with the exhaust gas G, to the dryer 5. 【0052】 Here, the heat exchanger 22 is installed in a circulation path (e.g., line L33) through which the second heat medium circulates between the dryer 5 and the combined heat and power system 10, and is a heat exchanger that exchanges heat between the second heat medium and the fluid. The heat exchanger 21 functions as a control system that adjusts the temperature of the second heat medium supplied to the dryer 5. This fluid is exhaust gas G discharged from the incinerator 1, and this exhaust gas G is untreated gas that has not been dust-removed. Untreated gas refers to exhaust gas upstream of the location of the heat exchanger 22 in line L2, which has not had dust removed by a dust remover. 【0053】 When supplying exhaust gas to a dust remover, it is necessary to lower the temperature of the exhaust gas. In particular, if the dust remover is a bag filter, it is necessary to lower the temperature of the exhaust gas significantly. In contrast, the heat exchanger 22 is supplied with untreated exhaust gas G. Therefore, the heat exchanger 22 can recover heat from the exhaust gas, which does not experience the temperature drop associated with passing through the dust remover, and can raise the temperature of the second heat medium more effectively. 【0054】 Since the heat exchanger 22 raises the temperature of the second heat medium, the temperature of the second heat medium supplied to the dryer 5 can be increased compared to when the heat exchanger 22 is not present (in other words, when the second heat medium does not pass through the heat exchanger 22). As a result, it is possible to suppress the supply of less thermal energy than necessary to the dryer 5. 【0055】 Next, we will describe a system that dynamically controls the amount of heat supplied to the dryer 5 according to the properties of the dewatered sludge. 【0056】 Line L33 is connected to a bypass line L36 that bypasses the heat exchanger 22. Valve V2 is installed on the bypass line L36. Hereafter, the heat exchanger 22, bypass line L36, and valve V2 will be collectively referred to as the adjustment system. 【0057】 Then, the operator controls the amount of the second heat transfer medium supplied to the heat exchanger 22 by controlling the opening and closing of valve V2 based on the properties of the dewatered sludge S measured by, for example, an instrument (not shown) installed upstream of the dryer 5. 【0058】 Specifically, we consider cases where the calorific value of organic matter contained in dewatered sludge S is less than a predetermined threshold, where the water content of dewatered sludge S is higher than a predetermined threshold, or where the proportion of organic matter in the ratio of organic matter to inorganic matter in dewatered sludge S is less than a predetermined proportion. Hereinafter, in these cases, the combustion efficiency of dewatered sludge S will be described as poor. When the combustion efficiency of dewatered sludge S is poor, it is necessary to thoroughly dry the dewatered sludge S in the dryer 5 to suppress the deterioration of combustion efficiency in the incinerator 1. 【0059】 First, the operator measures the properties of the dewatered sludge S, for example. Then, if the operator determines from the measurement results that the combustion efficiency of the dewatered sludge S is poor (in other words, if the operator determines that it is necessary to dry the dewatered sludge S sufficiently in the dryer 5 and that it is appropriate to supply more thermal energy to the dryer 5 than the thermal energy contained in the second heat medium supplied from the condenser 14), the operator controls the closing of valve V2 to supply the second heat medium to the heat exchanger 22, recovering the thermal energy contained in the exhaust gas G, and supplying the dryer 5 with the thermal energy recovered from the exhaust gas G in addition to the thermal energy contained in the second heat medium supplied from the condenser 14. 【0060】 More specifically, the operator controls the closing of valve V2 when, for example, the moisture content of the measured dewatered sludge S is higher than a predetermined threshold. 【0061】 As a result, the incineration system 200 in this embodiment can prevent insufficient incineration of the dewatered sludge S in the incinerator 1 due to, for example, insufficient thermal energy being supplied to the dryer 5 for drying the dewatered sludge S. Furthermore, the incineration system 200 can prevent an increase in the amount of fuel used for incinerating the dewatered sludge S due to, for example, insufficient thermal energy being supplied to the dryer 5 for drying the dewatered sludge S. 【0062】 Furthermore, the operator may, for example, control the opening and closing of valve V2 based on the properties of the dried sludge S measured by an instrument (not shown) installed downstream of the dryer 5 and upstream of the incinerator 1 (line L4). 【0063】 Furthermore, the incineration system 200 may have a control device (not shown) that controls the amount of thermal energy supplied to the dryer 5 by, for example, controlling the opening and closing of valve V2. The control device may, for example, automatically control the opening and closing of valve V2 based on the properties of the dewatered sludge S. 【0064】 Specifically, the control device may, for example, control the closing of valve V2 when the moisture content of the dewatered sludge S is higher than a predetermined threshold, thereby increasing the amount of thermal energy supplied to the dryer 5. More specifically, the control device may control the closing of valve V2 so that the amount of thermal energy supplied to the dryer 5 increases as the moisture content of the dewatered sludge S increases. 【0065】 Furthermore, the above example described a case where the dryer 5 is a steam dryer and the second heat transfer medium circulating between the dryer 5 and the condenser 14 (line L33) is, for example, water (water vapor). However, the explanation is not limited to this. Specifically, for example, the dryer 5 may be a heat transfer oil dryer, and heat transfer oil may circulate between the dryer 5 and the condenser 14. 【0066】 Furthermore, in the above example, the case in which the heat exchanger 22 is located on the line L33 that supplies the second heat medium from the condenser 14 to the dryer 5 was described. However, the heat exchanger 22 may also be located on the line L33 that supplies the second heat medium from the dryer 5 to the condenser 14. 【0067】 [Incineration system 300 in the third embodiment] Next, the incineration system 300 in the third embodiment will be described. Figure 4 is a diagram illustrating an example of the configuration of the incineration system 300 in the third embodiment. In the following, only the differences from the incineration system 900 in the comparative example, the incineration system 100 in the first embodiment, and the incineration system 200 in the second embodiment will be described. 【0068】 As shown in Figure 4, the incineration system 300 includes, for example, an incinerator 1, a heat transfer medium heater 2, a white smoke prevention air preheater 3, a flue gas treatment tower 4, a dryer 5, a scrubber 6, a combined heat and power system 10, a heat exchanger 21, and a heat exchanger 22. 【0069】 The incineration system 300 includes both the heat exchanger 21 of the incineration system 100 (first embodiment) and the heat exchanger 22 of the incineration system 200 (second embodiment). 【0070】 As a result, in this embodiment, if the incineration system 300 determines that it is not necessary to sufficiently dry the dewatered sludge S based on its properties, it is possible to reduce the amount of thermal energy supplied to the dryer 5 by controlling the opening and closing of valves V11 and V12. Conversely, if it determines that it is necessary to sufficiently dry the dewatered sludge S based on its properties, it is possible to increase the amount of thermal energy supplied to the dryer 5 by controlling the opening and closing of valve V2. 【0071】 Specifically, in the incineration system 300 of this embodiment, for example, if it is determined from the measured properties of the dewatered sludge S that it is not necessary to sufficiently dry the dewatered sludge S in the dryer 5 and that it is not appropriate to supply all of the thermal energy contained in the second heat medium supplied from the condenser 14 to the dryer 5, then valve V11 is closed, valve V12 is opened, and valve V2 is opened. On the other hand, in the incineration system 300, for example, if it is determined from the measured properties of the dewatered sludge S that it is necessary to sufficiently dry the dewatered sludge S in the dryer 5 and that it is appropriate to supply more thermal energy to the dryer 5 than the thermal energy contained in the second heat medium supplied from the condenser 14, then valve V11 is opened, valve V12 is closed, and valve V2 is closed. 【0072】 [Incineration system 400 in the fourth embodiment] Next, the incineration system 400 in the fourth embodiment will be described. Figure 5 is a diagram illustrating an example of the configuration of the incineration system 400 in the fourth embodiment. In the following description, only the differences from the incineration system 100 in the first embodiment will be explained. 【0073】 As shown in Figure 5, the incineration system 400 includes, for example, an incinerator 1, a white smoke prevention air preheater 3, a flue gas treatment tower 4, a dryer 5, a scrubber 6, a combined heat and power system 10, and a heat exchanger 21. 【0074】 The combined heat and power system 10 has the function of recovering the thermal energy of the exhaust gas G discharged from the incinerator 1 and converting it into other forms of energy, and includes, for example, an evaporator 11, a steam turbine 12, a generator 13, and a condenser 14. 【0075】 The evaporator 11 then uses the thermal energy of the exhaust gas G supplied from the incinerator 1 via line L2 to evaporate the working fluid. After that, the evaporator 11 supplies the exhaust gas G to the white smoke prevention air preheater 3. 【0076】 In other words, in the incineration system 400 of this embodiment, instead of using a heat exchanger (heat medium heater 2 in the incineration system 100) to perform heat exchange between the exhaust gas G supplied from the incinerator 1 via line L2 and the fluid that supplies thermal energy to the combined heat and power system 10, the exhaust gas G discharged from the incinerator 1 is directly supplied to the evaporator 11, and the thermal energy contained in the exhaust gas G directly heats the first heat medium in the combined heat and power system 10. 【0077】 In other words, the evaporator 11 directly heats and evaporates the first heat medium using the thermal energy of the exhaust gas from the incinerator 1, without the need for any other heat medium. To put it another way, in the incineration system 400 of this embodiment, the thermal energy of the exhaust gas G is recovered directly in the evaporator 11 without going through the heat medium heater 2 in the incineration system 100, and the recovered thermal energy is supplied to the first heat medium. 【0078】 As a result, the incineration system 400 in this embodiment can reduce the number of heat exchangers, thereby reducing the loss of thermal energy due to heat exchange in the heat exchangers. Therefore, the incineration system 400 in this embodiment can increase the amount of electricity generated in the combined heat and power system 10. 【0079】 In the above example, we have described an incineration system (incineration system 400) in which the heat transfer medium heater 2 is not provided in relation to the incineration system 100 (first embodiment). However, an incineration system in which the heat transfer medium heater 2 is not provided in relation to the incineration system 200 (second embodiment) or an incineration system in which the heat transfer medium heater 2 is not provided in relation to the incineration system 300 (third embodiment) may also be described. 【0080】 [Incineration system 500 in the fifth embodiment] Next, we will describe the incineration system 500 in the fifth embodiment. Figure 6 is a diagram illustrating an example of the configuration of the incineration system 500 in the fifth embodiment. In the following description, we will only explain the differences from the incineration system 400 in the fourth embodiment. 【0081】 As shown in Figure 6, the incineration system 500 includes, for example, an incinerator 1, a white smoke prevention air preheater 3, a flue gas treatment tower 4, a dryer 5, a scrubber 6, a combined heat and power system 10, and a heat exchanger 21. 【0082】 In this embodiment, the combined heat and power system 10 generates electricity using the thermal energy of a first heat medium that is directly or indirectly heated by waste heat from the incinerator 1. Here, indirect heating means heating the first heat medium with waste heat from the incinerator 1 using another heat exchanger (for example, the heat medium heater 2 in Figure 2), as explained in Figure 2. Specifically, the combined heat and power system 10 has the function of recovering the thermal energy of the exhaust gas G discharged from the incinerator 1 and converting it into other forms of energy, and includes, for example, an evaporator 11, a steam turbine 12, and a generator 13. The combined heat and power system 10 in this embodiment forms a thermal cycle such as a Rankine cycle or a Carina cycle by circulating a working medium (not shown) in line L32 (hereinafter also referred to as the circulation path L32). In this embodiment, line L32 is piping that sequentially connects at least the evaporator 11, the steam turbine 12, the dryer 5, and the heat exchanger 21. 【0083】 In other words, in the incineration system 500 of this embodiment, instead of the combined heat and power system 10 having a condenser, the dryer 5 is made to function as a condenser by directly supplying the first heat transfer medium to the dryer 5. 【0084】 As a result, in the incineration system 500 of this embodiment, it is possible to further reduce the number of heat exchangers to be installed, and to further reduce the loss of thermal energy due to heat exchange in the heat exchangers. Therefore, in the incineration system 500 of this embodiment, it is possible to further increase the amount of electricity generated in the combined heat and power system 10. 【0085】 Furthermore, in the incineration system 500 of this embodiment, for example, the second heat transfer medium used in the incineration system 100 is not required, making it possible to reduce the power required for the circulation of the second heat transfer medium. 【0086】 In this embodiment, the incineration system 500 may use a steam dryer or a heat transfer oil dryer as the dryer 5, similar to the case of the incineration system 100. Furthermore, in this embodiment, the incineration system 500 may, for example, use a steam dryer as the dryer 5, use a waste heat boiler as the evaporator 11, and use water as the first heat transfer medium circulating in line L32. 【0087】 Furthermore, in the above example, an incineration system (incinerator 500) in which the heat transfer medium heater 2 and condenser 14 are not provided in the incineration system 100 (first embodiment) has been described. However, an incineration system in which the heat transfer medium heater 2 and condenser 14 are not provided in the incineration system 200 (second embodiment) or an incineration system in which the heat transfer medium heater 2 and condenser 14 are not provided in the incineration system 300 (third embodiment) may also be described. 【0088】 As described above, in the present invention, for example, by adjusting the amount of the first heat transfer medium supplied to the heat exchanger 21 and the heat exchanger 22 based on the properties of the dewatered sludge S, it becomes possible to control the amount of thermal energy supplied to the dryer 5, and the dryer 5 can perform drying according to the properties of the dewatered sludge S. Therefore, in the present invention, it is possible to prevent problems from occurring in the incineration of the dewatered sludge S in the incinerator 1 due to excessive or insufficient drying of the dewatered sludge S in the dryer 5. 【0089】 The dryer 5 may also be a hot air dryer or a band dryer. If the dryer 5 is a hot air dryer or a band dryer, a drying air fan that discharges the drying air supplied to the dryer 5 and a heat exchanger must be provided separately. 【0090】 In the first to fourth embodiments, the heat exchanger exchanges heat between the drying air discharged by the drying air fan and the second heat transfer medium to raise the temperature of the drying air. Line L33 is also arranged so that the second heat transfer medium circulates between the combined heat and power system 10 and this heat exchanger. 【0091】 In the fifth embodiment, the heat exchanger exchanges heat between the drying air discharged by the drying air fan and the first heat transfer medium to raise the temperature of the drying air. Line L32 is a piping system that sequentially connects at least the evaporator 11, the steam turbine 12, the heat exchanger 21, and this heat exchanger, which is provided separately, and the first heat transfer medium is circulated through line L32 by a circulation pump (not shown). 【0092】 The dryer 5 dries the sludge with heated drying air. The dryer 5 may supply all of the dried drying air to the incinerator 1, or it may supply a portion of the dried drying air to the incinerator 1 and supply the remaining dried drying air to the primary side of the drying air fan. [Explanation of symbols] 【0093】 1: Incinerator 1a: Fluidized bed 2: Heat transfer fluid heater 3: White smoke prevention air preheater 4:Exhaust heat treatment tower 5:Dryer 6: Scrubber 10: Combined heat and power system 11: Evaporator 12: Steam turbine 13: Generator 14: Condenser 100: Incineration system 200: Incineration system A: Air to prevent white smoke G: Exhaust gas L1: Line L2: Line L11: Line L12: Line L13: Line L31: Line L32: Line L33: Line L34: Detour line L35: Detour line L36: Detour line P1: Combustion air fan P2: White smoke prevention air fan P3: Induction machine P4: Combustion air fan S: Sludge V11: Valve V12: Valve V2: Valve

Claims

[Claim 1] Incinerator and A combined heat and power system that generates electricity using the thermal energy of a first heat transfer medium heated by waste heat from the incinerator, A dryer that dries the material to be incinerated supplied to the incinerator using the thermal energy of a second heat medium heated by the thermal energy of the first heat medium, The system comprises an adjustment system for adjusting the temperature of the second heat transfer medium, The adjustment system is provided in a circulation path through which the second heat medium circulates between the dryer and the combined heat and power system, and includes a heat exchanger that exchanges heat between the second heat medium and the fluid. The aforementioned fluid is a white smoke prevention air in an incineration system. [Claim 2] Incinerator and A combined heat and power system that generates electricity using the thermal energy of a first heat transfer medium heated by waste heat from the incinerator, A dryer that dries the material to be incinerated supplied to the incinerator using the thermal energy of a second heat medium heated by the thermal energy of the first heat medium, The system comprises an adjustment system for adjusting the temperature of the second heat transfer medium, The adjustment system is provided in a circulation path through which the second heat medium circulates between the dryer and the combined heat and power system, and includes a heat exchanger that exchanges heat between the second heat medium and the fluid. An incineration system in which the fluid is a gas discharged from the incinerator that has not been treated for dust removal and is supplied from the heat exchanger to another heat exchanger that exchanges heat with white smoke prevention air.

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