阅读说明：本技术 具备炉排式焚烧炉的焚烧系统 (Incineration system provided with grate type incinerator ) 是由 井原贵行 河岸孝昌 于 2020-03-23 设计创作，主要内容包括：本发明涉及具备用于焚烧垃圾的焚烧炉的焚烧系统,尤其涉及控制用于将从炉排式焚烧炉排出的废气中包含的水银除去的水银吸附剂的供给量的技术。焚烧系统具备：炉排式焚烧炉(1),其具有使垃圾(2)干燥的干燥带(5)、使垃圾(2)燃烧的燃烧带(6)及使燃烧剩余的垃圾(2)燃烧的后燃烧带(7)；至少一个紫外线传感器(100),其检测炉排式焚烧炉(1)内的水银的浓度；供给装置(55),其向从炉排式焚烧炉(1)排出的废气中供给水银除去剂；以及动作控制部(80),其基于紫外线传感器(100)的输出信号,向供给装置(55)发出指令以控制水银除去剂的供给量。(The present invention relates to an incineration system including an incinerator for incinerating refuse, and more particularly to a technique for controlling the supply amount of a mercury adsorbent for removing mercury contained in exhaust gas discharged from a grate-type incinerator. The incineration system is provided with: a grate-type incinerator (1) having a drying zone (5) for drying the garbage (2), a combustion zone (6) for burning the garbage (2), and a post-combustion zone (7) for burning the remaining garbage (2); at least one ultraviolet sensor (100) that detects the concentration of mercury within the grate-type incinerator (1); a supply device (55) which supplies a mercury removing agent to the exhaust gas discharged from the grate-type incinerator (1); and an operation control unit (80) that issues a command to the supply device (55) to control the amount of the mercury removing agent to be supplied, based on an output signal of the ultraviolet sensor (100).)

1. An incineration system is provided with:

a grate-type incinerator having a drying zone for drying garbage, a combustion zone for burning the garbage, and a post-combustion zone for burning the remaining garbage;

at least one ultraviolet sensor that detects the concentration of mercury within the grate-type incinerator;

a supply device that supplies a mercury removing agent to the exhaust gas discharged from the grate-type incinerator; and

and an operation control unit that issues a command to the supply device to control the supply amount of the mercury removing agent based on an output signal of the ultraviolet sensor.

2. The incineration system of claim 1,

the ultraviolet sensor is disposed above the drying belt.

3. The incineration system of claim 1,

the at least one ultraviolet sensor is a plurality of ultraviolet sensors arranged along a moving direction of the garbage in the grate-type incinerator.

4. The incineration system of claim 3,

the plurality of ultraviolet sensors are fixed to a side wall of the grate type incinerator.

5. The incineration system of claim 4,

the plurality of ultraviolet sensors includes: at least one upstream-side ultraviolet sensor disposed above the drying belt; and at least one downstream-side ultraviolet sensor disposed above the combustion zone.

6. The incineration system of any one of claims 1 to 5,

the operation control unit is configured to issue a command to the supply device to increase the supply amount of the mercury remover when a value of an output signal of the ultraviolet sensor exceeds a threshold value.

7. The incineration system of claim 6,

the operation control unit is configured to instruct the supply device to supply the mercury remover into the exhaust gas at a 1 st supply amount when a value of an output signal of the ultraviolet sensor is equal to or less than the threshold, and to instruct the supply device to supply the mercury remover into the exhaust gas at a 2 nd supply amount that is larger than the 1 st supply amount when the value of the output signal of the ultraviolet sensor exceeds the threshold.

8. The incineration system of claim 7,

the incineration system is also provided with: a filter type dust collector disposed on a downstream side of the grate-type incinerator; and a mercury concentration meter disposed on the downstream side of the filter dust collector,

the supply device continues to supply the mercury remover at the 2 nd supply amount until the mercury concentration value indicated by the mercury concentration meter becomes equal to or less than a set value.

Technical Field

The present invention relates to an incineration system including an incinerator for incinerating refuse, and more particularly to a technique for controlling the supply amount of a mercury adsorbent for removing mercury contained in exhaust gas discharged from a grate-type incinerator.

Background

The grate-type incinerator is an incinerator in which garbage is burned on a grate while moving the garbage over the grate. In some cases, mercury is contained in garbage, and as the garbage is burned, the mercury is vaporized and partially oxidized, and is discharged from the grate-type incinerator together with exhaust gas. Therefore, mercury is removed by injecting a mercury remover (for example, activated carbon) into the exhaust gas on the downstream side of the grate-type incinerator.

In the method of supplying the mercury remover in a constant amount without detecting the concentration of mercury, the efficiency is low because the mercury remover is used in a large amount more than necessary in preparation for discharging a large amount of mercury. Therefore, in order to reduce the amount of mercury removing agent used, the concentration of mercury is measured at the front stage of the filter type dust collector (the outlet or the interior of the grate type incinerator) or at the outlet of the filter type dust collector, and the mercury removing agent corresponding to the concentration is supplied (for example, see patent documents 1, 2, and 3).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2017-205761

Patent document 2: japanese patent No. 6016205

Patent document 3: japanese patent No. 6070971

Disclosure of Invention

However, in a method of measuring the mercury concentration in a front stage of a general filter type dust collector or in an incinerator, since a high-temperature sample gas is sampled and the mercury concentration in the sample gas is measured, the sampling pipe may be clogged with dust or moisture contained in the sample gas, and it may be difficult to measure the mercury concentration. In this method, since a part of the exhaust gas is collected, it is difficult to say that the measured value obtained in a state where the gas flow in the furnace is not uniform reflects the average of the mercury concentration in the entire furnace, and the mercury removing agent may not be supplied in an appropriate amount. In addition, the sampling mode has a time lag, and thus the detection speed of the mercury concentration is slow, resulting in a control delay.

Accordingly, the present invention provides an incineration system capable of accurately and instantaneously detecting the concentration of mercury present in a grate-type incinerator and appropriately controlling the supply amount of a mercury removing agent.

In one aspect, an incineration system is provided with: a grate-type incinerator having a drying zone for drying garbage, a combustion zone for burning the garbage, and a post-combustion zone for burning the remaining garbage; at least one ultraviolet sensor for detecting the concentration of mercury in the grate-type incinerator; a supply device for supplying a mercury removing agent to the exhaust gas discharged from the grate-type incinerator; and an operation control unit that issues an instruction to the supply device to control the supply amount of the mercury removing agent based on an output signal of the ultraviolet sensor.

In one embodiment, the ultraviolet sensor is disposed above the drying belt.

In one embodiment, the at least one ultraviolet sensor is a plurality of ultraviolet sensors arranged along a moving direction of the garbage in the grate-type incinerator.

In one embodiment, the plurality of ultraviolet sensors are fixed to a side wall of the fire grate type incinerator.

In one aspect, the plurality of ultraviolet sensors include: at least one upstream side ultraviolet sensor disposed above the drying belt; and at least one downstream-side ultraviolet sensor disposed above the combustion zone.

In one embodiment, the operation control unit is configured to issue a command to the supply device to increase the supply amount of the mercury removing agent when a value of an output signal of the ultraviolet sensor exceeds a threshold value.

In one embodiment, the operation control unit is configured to instruct the supply device to supply the mercury remover into the exhaust gas at a 1 st supply amount when the value of the output signal of the ultraviolet sensor is equal to or less than the threshold value, and instruct the supply device to supply the mercury remover into the exhaust gas at a 2 nd supply amount that is larger than the 1 st supply amount when the value of the output signal of the ultraviolet sensor exceeds the threshold value.

In one aspect, the incineration system further includes: a filter type dust collector disposed on the downstream side of the grate type incinerator; and a mercury concentration meter disposed downstream of the filter type dust collector, wherein the supply device continues to supply the mercury removing agent at the 2 nd supply amount until a mercury concentration value indicated by the mercury concentration meter becomes a set value or less.

Effects of the invention

The ultraviolet sensor can instantaneously detect the concentration of mercury present in the flame by detecting ultraviolet rays generated when mercury is vaporized and partially oxidized. The operation control unit can quickly operate the supply device according to the concentration of mercury in the grate-type incinerator to supply the optimum amount of mercury remover to the exhaust gas.

Drawings

Fig. 1 is a diagram showing an embodiment of an incineration system provided with a grate-type incinerator.

FIG. 2 is a view showing another embodiment of the incineration system.

FIG. 3 is a view showing another embodiment of the incineration system.

FIG. 4 is a view showing another embodiment of the incineration system.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of an incineration system. The incineration system is provided with a grate-type incinerator 1 for incinerating refuse 2. The grate-type incinerator 1 includes three belts, i.e., a drying belt 5 for drying the garbage 2, a combustion belt 6 for burning the dried garbage 2, and a post-combustion belt 7 for burning the remaining garbage 2. The refuse 2 is conveyed in sequence towards a drying zone 5, a combustion zone 6 and a post-combustion zone 7.

The grate-type incinerator 1 includes: a drying grate 11 disposed on the drying belt 5; a combustion grate 12 disposed in the combustion zone 6; and a post-combustion grate 13 disposed on the post-combustion zone 7. The drying grate 11, the combustion grate 12 and the post-combustion grate 13 are arranged in the order of the drying grate 11, the combustion grate 12 and the post-combustion grate 13 along the moving direction of the garbage 2 in the grate-type incinerator 1. In the present embodiment, the combustion zone 6 is divided into a 1 st combustion zone 6A located on the upstream side and a 2 nd combustion zone 6B located on the downstream side in the moving direction of the refuse 2.

The grate-type incinerator 1 includes a hopper 17 into which the garbage 2 is charged, and a garbage conveyance device 20 that conveys the garbage 2 charged into the hopper 17 to the drying belt 5. The garbage conveyance device 20 is disposed below the hopper 17. The conveying amount of the waste 2 to the drying belt 5 can be adjusted by the waste conveying device 20. The refuse 2 conveyed to the drying belt 5 is conveyed toward the ash chute 22 by the operation of movable grate segments (not shown) of the drying grate 11, the combustion grate 12, and the post-combustion grate 13.

A drying grate driving device 25 for driving the drying grate 11 is arranged below the drying grate 11. The drying grate driving device 25 is coupled to a movable grate segment (not shown) constituting the drying grate 11, and conveys the waste 2 on the drying grate 11 to the downstream side by relatively moving the movable grate segment with respect to a fixed grate segment (not shown).

A combustion grate drive 26 is disposed below the combustion grate 12 for driving the combustion grate 12. The combustion grate driving device 26 is coupled to a movable grate segment (not shown) constituting the combustion grate 12, and conveys the waste 2 on the combustion grate 12 to the downstream side by relatively moving the movable grate segment with respect to a fixed grate segment (not shown).

A post-combustion grate driving device 27 for driving the post-combustion grate 13 is disposed below the post-combustion grate 13. The post-combustion grate driving device 27 is connected to a movable grate segment (not shown) constituting the post-combustion grate 13, and conveys the waste 2 on the post-combustion grate 13 to the downstream side by relatively moving the movable grate segment with respect to a fixed grate segment (not shown).

The speed of movement of the waste 2 on the grates 11, 12, 13 of the three belts 5, 6, 7 can be adjusted by the respective grate drive 25, 26, 27 described above.

A drying air box 41 is disposed below the drying grate 11. A 1 st combustion air tank 42A and a 2 nd combustion air tank 42B are disposed below the combustion grate 12. An after-combustion air tank 43 is disposed below the after-combustion grate 13. The arrangement of the 1 st combustion air tank 42A and the 2 nd combustion air tank 42B corresponds to the arrangement of the 1 st combustion zone 6A and the 2 nd combustion zone 6B.

The primary air as the combustion air is sent to the drying air tank 41, the 1 st combustion air tank 42A, the 2 nd combustion air tank 42B, and the post-combustion air tank 43. The primary air is supplied from below to the drying grate 11, the combustion grate 12, and the post-combustion grate 13, and the garbage 2 on the grates 11, 12, and 13 is burned.

In the embodiment shown in fig. 1, two combustion air tanks 42A and 42B are provided in the combustion zone 6, but in one embodiment, a single combustion air tank may be provided. In this case, the combustion zone 6 is not divided into the 1 st combustion zone 6A and the 2 nd combustion zone 6B.

The incineration system has: a boiler 51 connected to the downstream side of the grate-type incinerator 1; a filter dust collector 53 connected to the downstream side of the boiler 51; a supply device 55 for supplying a mercury removing agent into the exhaust gas; and a chimney 56 connected to the downstream side of the filter dust collector 53. The incineration system also includes a mercury concentration meter 57 provided downstream of the filter dust collector 53. The mercury concentration meter 57 is constituted by a general automatic measuring instrument of dry reduction system or the like. The exhaust gas (combustion exhaust gas) discharged from the grate-type incinerator 1 passes through the boiler 51 and the filter dust collector 53 and is discharged to the atmosphere from the stack 56.

The boiler 51 is a device that generates steam by evaporating water using waste heat of the exhaust gas. The temperature of the exhaust gas is lowered by heat exchange with water. The filter dust collector 53 is a device for collecting dust (fly ash) in the exhaust gas, and is also called a bag filter.

The boiler 51 communicates with the filter dust collector 53 through a communication passage 70, and the supply device 55 is connected to the communication passage 70. The exhaust gas flows from the boiler 51 to the filter dust collector 53 through the communication passage 70. The supply device 55 is configured to supply the mercury removing agent to the exhaust gas passing through the communication path 70. The mercury removing agent used in the present embodiment is a mercury adsorption removing agent including activated carbon capable of adsorbing mercury in exhaust gas. The mercury in the exhaust gas is adsorbed and removed by the mercury remover and reduced to a predetermined value or less.

The incineration system further includes: an ultraviolet sensor 100 for measuring the concentration of mercury in the grate-type incinerator 1; and an operation control unit 80 for controlling the operation of the supply device 55 based on the output signal of the ultraviolet sensor 100. The operation control unit 80 includes a storage device 80a in which a program is stored, and an arithmetic device 80b that performs arithmetic operations in accordance with commands included in the program. The arithmetic device 80b includes a CPU (central processing unit) or a GPU (graphics processing unit) that performs arithmetic operations in accordance with commands included in a program. The storage device 80a includes a main storage device (for example, a random access memory) accessible to the arithmetic device 80b, and an auxiliary storage device (for example, a hard disk drive or a solid-state disk) that stores data and programs.

The ultraviolet sensor 100 is a front ultraviolet sensor that detects the concentration of mercury present in the flame from the front of the flame. In the present embodiment, the ultraviolet sensor 100 is positioned above the drying grate 11 of the grate-type incinerator 1 (above the drying belt 5), and is fixed to the ceiling wall 1A of the grate-type incinerator 1. A window (not shown) made of quartz glass or the like is provided in the ceiling wall 1A, and the ultraviolet sensor 100 can instantaneously detect the concentration of mercury present in the flame in the grate-type incinerator 1 through the window. The ultraviolet sensor 100 is disposed from a position above the drying belt 5 toward the post-combustion belt 7. More specifically, the ultraviolet sensor 100 faces the direction in which the garbage 2 in the grate-type incinerator 1 moves. In the grate-type incinerator 1, the garbage 2 moves in the order of a drying zone 5, a combustion zone 6, and a post-combustion zone 7.

The ultraviolet sensor 100 detects ultraviolet rays generated when mercury contained in garbage in the grate-type incinerator 1 is vaporized and partially oxidized, and generates an output signal indicating the intensity of the ultraviolet rays (the amount of ultraviolet rays). The ultraviolet sensor 100 is configured to detect ultraviolet rays in a wavelength range of 185 to 400nm (preferably 185 to 260nm) in order to detect ultraviolet rays generated by mercury contained in garbage. The value represented by the output signal of the ultraviolet sensor 100 varies depending on the concentration of mercury present in the flame in the fire grate type incinerator 1. The concentration of mercury corresponds to the amount of mercury that is vaporized and partially oxidized as the garbage burns. The ultraviolet sensor 100 is electrically connected to the operation control unit 80, and an output signal of the ultraviolet sensor 100 is transmitted to the operation control unit 80. The operation control unit 80 gives a command to the supply device 55 to control the supply amount of the mercury removing agent based on the output signal of the ultraviolet sensor 100.

The ultraviolet sensor 100 can directly detect the concentration of mercury present in the flame. In contrast, the conventional sampling-type mercury concentration measurement system has a time lag in measuring the concentration of mercury contained in the exhaust gas by extracting a part of the exhaust gas from the incinerator. According to the present embodiment, the operation control unit 80 can quickly operate the supply device 55 according to the concentration of mercury in the grate-type incinerator 1, and supply an optimum amount of the mercury removing agent to the exhaust gas. In addition, although it is considered that a laser analyzer having a light emitting portion and a light receiving portion is used for mercury detection, the light emitting portion and the light receiving portion need to be arranged on a straight line in the incinerator, and therefore, the ultraviolet sensor is limited in arrangement, and can detect the concentration of mercury in the incinerator in an arbitrary arrangement.

It is envisaged that most of the mercury contained in the waste 2 will be vaporised in the drying zone 5. Therefore, the ultraviolet sensor 100 disposed above the drying belt 5 can quickly detect ultraviolet rays emitted from mercury contained in the dust 2 existing on the drying belt 5. The operation control unit 80 performs feed-forward control for adjusting the supply amount of the mercury removing agent downstream of the grate-type incinerator 1 based on the output signal of the ultraviolet sensor 100 (that is, a numerical value including the amount of ultraviolet light in the drying zone 5).

In the present embodiment, the operation control unit 80 is configured to instruct the supply device 55 to increase the supply amount of the mercury removing agent when the numerical value of the output signal of the ultraviolet sensor 100 (that is, the concentration of mercury in the fire grate type incinerator 1) exceeds a threshold value. More specifically, the operation control unit 80 is configured to give a command to the supply device 55 to supply the mercury removing agent into the exhaust gas at the 1 st supply amount when the value of the output signal of the ultraviolet sensor is equal to or less than the threshold value, and give a command to the supply device 55 to supply the mercury removing agent into the exhaust gas at the 2 nd supply amount which is larger than the 1 st supply amount when the value of the output signal of the ultraviolet sensor exceeds the threshold value. The supply device 55 continues to supply the mercury remover at the 2 nd supply amount until the mercury concentration value indicated by the mercury concentration meter 57 provided on the downstream side of the filter dust collector 53 becomes equal to or less than the set value. By such an operation, the mercury removing agent can be supplied to the exhaust gas in a minimum amount necessary to remove the mercury from the exhaust gas. In one embodiment, the operation control section 80 may issue a command to the supply device 55 based on a value of an output signal of the ultraviolet sensor to continuously change the supply amount of the mercury removing agent.

Fig. 2 is a diagram showing another embodiment of the incineration system including the grate-type incinerator 1. The configuration and operation of the present embodiment, which are not described in particular, are the same as those of the embodiment described with reference to fig. 1, and therefore, redundant description thereof is omitted.

In the present embodiment, a plurality of ultraviolet sensors 105, 106, 107, and 108 are provided. These ultraviolet sensors 105, 106, 107, and 108 are side ultraviolet sensors that are fixed to a side wall (not shown) of the grate-type incinerator 1 and detect the concentration of mercury present in the flame from the side of the flame. Similarly to the embodiment shown in fig. 1, a plurality of windows (not shown) made of quartz glass or the like are provided in the side wall of the grate-type incinerator 1, and the ultraviolet sensors 105, 106, 107, and 108 are disposed so as to detect the concentration of mercury present in the flame in the grate-type incinerator 1 through the windows.

As shown in fig. 2, the ultraviolet sensors 105, 106, 107, 108 are arranged along the moving direction of the garbage 2 in the grate-type incinerator 1. These ultraviolet sensors 105, 106, 107, and 108 are oriented in a direction perpendicular to the moving direction of the garbage 2 in the grate-type incinerator 1. The ultraviolet sensors 105, 106, 107, 108 are located above the drying zone 5 and the combustion zone 6 (above the drying grate 11 and the combustion grate 12). The ultraviolet sensors 105, 106, 107, 108 include upstream-side ultraviolet sensors 105, 106 disposed on the upstream side in the moving direction of the garbage 2, and downstream-side ultraviolet sensors 107, 108 disposed on the downstream side.

The 1 st upstream side ultraviolet sensor 105 is disposed above the drying zone 5, and the 2 nd upstream side ultraviolet sensor 106 is disposed above the 1 st combustion zone 6A. The two downstream side ultraviolet sensors 107 and 108 are disposed above the combustion zone 6. More specifically, the 1 st downstream side ultraviolet sensor 107 is disposed above the 1 st combustion zone 6A, and the 2 nd downstream side ultraviolet sensor 108 is disposed above the 2 nd combustion zone 6B.

According to the embodiment shown in fig. 2, the plurality of ultraviolet sensors 105, 106, 107, and 108 can detect ultraviolet rays emitted from mercury vaporized in the drying zone 5 as well as ultraviolet rays emitted from mercury vaporized in the combustion zone 6. The operation control unit 80 is configured to supply the mercury removing agent into the exhaust gas at a 2 nd supply amount that is larger than the 1 st supply amount during the steady operation when the value of the output signal of at least one of the ultraviolet sensors 105, 106, 107, and 108 exceeds a threshold value.

In the present embodiment, four ultraviolet sensors 105, 106, 107, and 108 are provided, but in one embodiment, five or more ultraviolet sensors may be provided. Further, a plurality of ultraviolet sensors may be disposed on both side walls of the grate-type incinerator 1.

As shown in fig. 3, the ultraviolet sensor 100 shown in fig. 1 may be combined with the ultraviolet sensors 105, 106, 107, and 108 shown in fig. 2. According to the embodiment shown in fig. 3, the ultraviolet sensor 100 detects the entire amount of ultraviolet light in the drying zone 5 and the combustion zone 6, and the ultraviolet sensors 105, 106, 107, and 108 can detect the amount of ultraviolet light (that is, the concentration of mercury) along the moving direction of the garbage 2.

FIG. 4 is a view showing another embodiment of the incineration system. The configuration and operation of the present embodiment, which are not described in particular, are the same as those of the embodiment shown in fig. 1, and therefore, redundant description thereof is omitted. In the present embodiment, the incineration system includes an ultraviolet sensor 111 disposed above the combustion zone 6 and an ultraviolet sensor 112 disposed downstream of the post-combustion zone 7. The ultraviolet sensors 111 and 112 are rear ultraviolet sensors that detect the concentration of mercury present in the flame from behind.

The ultraviolet sensor 111 is located above the combustion grate 12 of the grate-type incinerator 1 (above the combustion zone 6), and is fixed to the ceiling wall 1B of the grate-type incinerator 1. A window (not shown) made of quartz glass or the like is provided in the ceiling wall 1B, and the ultraviolet sensor 111 can detect the concentration of mercury present in the flame in the grate-type incinerator 1 through the window. The ultraviolet sensor 112 is fixed to the vertical wall 1C of the fire grate type incinerator 1 located above the ash chute 22. The vertical wall 1C is provided with a window (not shown) made of quartz glass or the like, and the ultraviolet sensor 112 can detect the concentration of mercury present in the flame in the grate-type incinerator 1 through the window.

The ultraviolet sensors 111 and 112 face in the direction opposite to the moving direction of the garbage 2 in the grate-type incinerator 1. The ultraviolet sensor 111 is disposed from a position above the combustion zone 6 in the direction of the drying zone 5, and the ultraviolet sensor 112 is disposed from a position behind the post-combustion zone 7 in the direction of the combustion zone 6. The ultraviolet sensor 111 is provided mainly for detecting the concentration of mercury present in the flame in the drying zone 5 and the combustion zone 6, and the ultraviolet sensor 112 is provided mainly for detecting the concentration of mercury present in the flame in the combustion zone 6.

The operation control unit 80 is configured to supply the mercury removing agent into the exhaust gas at a 2 nd supply amount that is larger than the 1 st supply amount during the steady operation when the value of the output signal of at least one of the ultraviolet sensor 111 and the ultraviolet sensor 112 exceeds a threshold value.

The embodiment shown in fig. 4 may also be combined with the embodiment shown in fig. 1, the embodiment shown in fig. 2, or the embodiment shown in fig. 3.

The above-described embodiments are described in order to enable those skilled in the art to practice the present invention. It is needless to say that those skilled in the art can implement various modifications of the above-described embodiments, and the technical idea of the present invention can be applied to other embodiments. Therefore, the present invention is not limited to the embodiments described above, and can be explained within the maximum scope of the technical idea defined by the claims.

Industrial applicability

The present invention is applicable to a technique for controlling the supply amount of a mercury adsorbent for removing mercury contained in exhaust gas discharged from a grate-type incinerator.

Description of the figures

1 grate type incinerator

5 drying belt

6 zone of combustion

6A 1 st combustion zone

6B 2 nd combustion zone

7 post combustion zone

11 drying grate

12 combustion grate

13 post-combustion grate

17 hopper

20 garbage conveying device

22 ash groove

25 drying grate driving device

26 combustion grate driving device

27 post-combustion grate drive

41 air box for drying

42A 1 st combustion air box

42B air box for 2 nd combustion

43 air box for after-combustion

51 boiler

53 filtering dust collector

55 supply device

56 chimney

57 mercury concentration meter

70 communication path

80 operation control part

80a memory device

80b arithmetic device

100 ultraviolet sensor

105. 106, 107, 108 ultraviolet sensor

111 ultraviolet ray sensor

112 ultraviolet sensor.