阅读说明：本技术 一种含急冷装置的循环流化床固废焚烧锅炉及方法 (Circulating fluidized bed solid waste incineration boiler containing quenching device and method ) 是由 蔡斌 宗登科 王�忠 周红花 韩新儿 于 2021-01-22 设计创作，主要内容包括：本发明涉及一种含急冷装置的循环流化床固废焚烧锅炉及方法,用于循环流化床锅炉固废焚烧,属于循环流化床锅炉领域。本发明包括急冷喷淋自动控制系统,其结构特点在于：还包括炉膛、旋风分离器、返料装置、分离器出口烟道、包墙、尾部烟道,所述急冷喷淋自动控制系统包括急冷装置、喷淋装置、急冷装置入口温度测点和急冷装置出口温度测点,所述炉膛、旋风分离器与返料装置依次循环连接,所述旋风分离器、分离器出口烟道、包墙、急冷装置和尾部烟道依次连接,所述喷淋装置设置在急冷装置内,所述急冷装置入口温度测点和急冷装置出口温度测点分别设置在急冷装置的入口端和出口端。(The invention relates to a circulating fluidized bed solid waste incineration boiler containing a quenching device and a method, which are used for the solid waste incineration of the circulating fluidized bed boiler and belong to the field of circulating fluidized bed boilers. The invention comprises a quenching spraying automatic control system, which is structurally characterized in that: the quenching spray automatic control system comprises a quenching device, a spray device, a quenching device inlet temperature measuring point and a quenching device outlet temperature measuring point, the furnace, the cyclone separator and the quenching device are sequentially and circularly connected, the cyclone separator, the separator outlet flue, the bag wall, the quenching device and the tail flue are sequentially connected, the spray device is arranged in the quenching device, and the quenching device inlet temperature measuring point and the quenching device outlet temperature measuring point are respectively arranged at the inlet end and the outlet end of the quenching device.)

1. The utility model provides a contain circulating fluidized bed of rapid cooling device and burn boiler useless admittedly, sprays automatic control system including the rapid cooling, its characterized in that: also comprises a hearth (1), a cyclone separator (2), a material returning device (3), a separator outlet flue (4), a wrapping wall (5) and a tail flue (7), the quenching and spraying automatic control system comprises a quenching device (6), a spraying device (8), a quenching device inlet temperature measuring point (9) and a quenching device outlet temperature measuring point (10), the hearth (1), the cyclone separator (2) and the material returning device (3) are sequentially connected in a circulating way, the cyclone separator (2), the separator outlet flue (4), the wrapping wall (5), the quenching device (6) and the tail flue (7) are connected in sequence, the spraying device (8) is arranged in the quenching device (6), and the inlet temperature measuring point (9) and the outlet temperature measuring point (10) of the quenching device are respectively arranged at the inlet end and the outlet end of the quenching device (6).

2. The circulating fluidized bed solid waste incineration boiler with the quenching device as claimed in claim 1, characterized in that: the inlet temperature measuring point (9) of the quenching device, the spraying device (8) and the outlet temperature measuring point (10) of the quenching device are sequentially arranged.

3. The circulating fluidized bed solid waste incineration boiler with the quenching device as claimed in claim 1, characterized in that: the wrapping wall (5) comprises a descending channel and an ascending channel, the descending channel is connected with the ascending channel, and the descending channel and the ascending channel are respectively connected with the outlet flue (4) of the separator and the quenching device (6).

4. The circulating fluidized bed solid waste incineration boiler with the quenching device as claimed in claim 3, characterized in that: a heat exchange surface is arranged in the ascending channel and is a superheater or an evaporator.

5. The circulating fluidized bed solid waste incineration boiler with the quenching device as claimed in claim 1, characterized in that: and a heat exchange surface is arranged in the tail flue (7), and the heat exchange surface is an air preheater or an economizer.

6. A method for operating a circulating fluidized bed solid waste incineration boiler containing a quenching device as claimed in any one of claims 1 to 5, characterized in that: the working method comprises the following steps: the flue gas with the outlet temperature of 500 ℃ of the wrapping wall (5) enters a quenching device (6), the flue gas is directly contacted with atomized spraying water mist in the quenching device (6), the flue gas is contacted with the water mist within 1 second for evaporation and vaporization, the flue gas is cooled to 200 ℃ from 500 ℃ through heat exchange and heat release, and the resynthesis of dioxin-like substances is avoided.

7. The working method of the circulating fluidized bed solid waste incineration boiler with the quenching device as claimed in claim 6, characterized in that: the spraying device (8) automatically tracks and adjusts the water spraying amount of the water spraying gun according to the change of the outlet temperature measuring point (10) of the quenching device, so that the outlet temperature of the quenching device (6) is maintained in a proper temperature range, and the phenomenon of over-spraying or under-spraying is avoided; because compressed air is atomized in the spray gun, water is atomized into fog drops, the fog drops are evaporated in high-temperature flue gas to absorb the heat of the flue gas, so that the temperature of the flue gas is reduced and maintained within a certain temperature range, and when the temperature of the flue gas at the outlet of the quenching device (6) is not within a set working range, the quenching system can automatically adjust relevant parameters, so that the temperature of the flue gas is ensured within the working range.

8. The working method of the circulating fluidized bed solid waste incineration boiler with the quenching device as claimed in claim 6, characterized in that: the wrapping wall (5) adopts a membrane type wall structure, the wrapping wall (5) is divided into an ascending channel and a descending channel, and on the first hand, the descending channel is internally provided with a cavity, so that the retention time of high-temperature flue gas of the boiler is prolonged; in the second aspect, partial ash is separated through the turning directions of the descending channel and the ascending channel, and the catalyst for secondary synthesis of dioxin is reduced; in the third aspect, the outlet temperature of the wrapping wall (5) is controlled at 500 ℃ by arranging a replacement hot face in the rising channel.

9. The working method of the circulating fluidized bed solid waste incineration boiler with the quenching device as claimed in claim 6, characterized in that: the hot surface of the tail flue (7) is replaced by the inner cloth, so that the flue gas waste heat after quenching and temperature reduction is recovered, and the efficiency of the boiler is improved.

10. The working method of the circulating fluidized bed solid waste incineration boiler with the quenching device as claimed in claim 6, characterized in that: the furnace (1), the cyclone separator (2) and the material returning device (3) can ensure that the temperature in the furnace (1) is uniform, the combustion is stable, 3T conditions can be provided for the pyrolysis of the dioxin, and the decomposition of the dioxin is ensured.

Technical Field

The invention relates to a circulating fluidized bed solid waste incineration boiler containing a quenching device and a method, which are used for the solid waste incineration of the circulating fluidized bed boiler and belong to the field of circulating fluidized bed boilers.

Background

With the development of industry, the amount of general industrial wastes, such as waste tires and rubber produced in transportation and manufacturing industry, waste paper and waste residues produced in printing enterprises, leftover materials and leather scraps produced in garment processing industry, sludge produced in water treatment plants, etc., is increasing day by day, and an optimal disposal method is urgently needed to be found.

After years of development, the fluidized bed boiler technology is preliminarily mature and can meet the requirements of industrial production. Meanwhile, the circulating fluidized bed combustion technology is a clean combustion technology which can not only adapt to different fuels, but also enable the fuels to be efficiently combusted and reduce the emission concentration of pollutants. In the fluidized bed hearth, because the whole hearth is filled with materials and the heat capacity is large, the combustion speed of the fuel is high, and the fluidized bed hearth is particularly suitable for the disposal of high-moisture and low-heat-value solid waste such as paper residues of a paper mill and sludge of a water treatment plant.

Due to the content of chlorine organic matters in the solid waste, dioxin possibly remained in the combustion process after incomplete combustion has great influence on the environment, mainly contains organic chloride with two oxygen bonds connecting two benzene rings, and is a carcinogenic substance with very strong toxicity. The dioxin can be decomposed through the 3T effect in the combustion process of the hearth. However, the decomposed dioxin is regenerated when meeting certain catalyst substances (mainly heavy metals, particularly copper and the like) in the temperature range of 500-200 ℃ at the tail of the boiler.

In view of this, patent document No. 201220444793.2 discloses a device for suppressing generation of dioxin in incineration flue gas, and the comparison document is different from the method adopted in the present application, and compared with the comparison document, the present application discloses a circulating fluidized bed solid waste incineration boiler containing a quenching device, which can realize reduction of common industrial solid waste and has a boiler with good environmental protection.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the circulating fluidized bed solid waste incineration boiler with the quenching device and the method, which have reasonable structural design, reduce the emission of dioxin and avoid the secondary synthesis of the dioxin in the temperature range.

The technical scheme adopted by the invention for solving the problems is as follows: this contain circulating fluidized bed of rapid cooling device and burn boiler admittedly useless, spray automatic control system including the rapid cooling, its structural feature lies in: the quenching spray automatic control system comprises a quenching device, a spray device, a quenching device inlet temperature measuring point and a quenching device outlet temperature measuring point, the furnace, the cyclone separator and the quenching device are sequentially and circularly connected, the cyclone separator, the separator outlet flue, the bag wall, the quenching device and the tail flue are sequentially connected, the spray device is arranged in the quenching device, and the quenching device inlet temperature measuring point and the quenching device outlet temperature measuring point are respectively arranged at the inlet end and the outlet end of the quenching device.

Further, the inlet temperature measuring point of the quenching device, the spraying device and the outlet temperature measuring point of the quenching device are sequentially arranged.

Further, the containment wall comprises a descending channel and an ascending channel, the descending channel is connected with the ascending channel, and the descending channel and the ascending channel are respectively connected with the separator outlet flue and the quenching device.

Further, a heat exchange surface is arranged in the ascending channel, and the heat exchange surface is a superheater or an evaporator.

Furthermore, a heat exchange surface is arranged in the tail flue, and the heat exchange surface is an air preheater or an economizer.

Further, the invention also aims to provide a working method of the circulating fluidized bed solid waste incineration boiler with the quenching device.

The technical purpose of the invention is realized by the following technical scheme.

A working method of a circulating fluidized bed solid waste incineration boiler containing a quenching device is characterized in that: the working method comprises the following steps: the flue gas with the outlet temperature of 500 ℃ of the wrapping wall enters the quenching device, the high-temperature flue gas is directly contacted with atomized spraying water mist in the quenching device, the flue gas can be contacted with the water mist for evaporation and vaporization within 1 second, the heat is rapidly released through heat exchange, so that the temperature of the flue gas is reduced from 500 ℃ to 200 ℃, and the resynthesis of dioxin-like substances is effectively avoided.

Furthermore, the spraying device can automatically track and adjust the water spraying amount of the water spraying gun according to the change of the outlet temperature measuring point of the quenching device, so that the outlet temperature of the quenching device is maintained in a proper temperature range, and the phenomenon of over-spraying or under-spraying is avoided; the spray gun has the advantages that water is atomized into fine fog drops due to the atomization of compressed air, the fog drops are quickly evaporated in high-temperature flue gas to absorb a large amount of heat of the flue gas, so that the temperature of the flue gas is quickly reduced and maintained within a certain temperature range, and when the temperature of the flue gas at the outlet of the quenching device is not within a set working range, the quenching system can automatically adjust relevant parameters such as water supply pressure and water spraying amount, so that the temperature of the flue gas is ensured within the working range.

Furthermore, the wrapping wall is of a membrane wall structure and is divided into an ascending channel and a descending channel, and on the first hand, the descending channel is internally provided with a cavity, so that the retention time of the high-temperature flue gas of the boiler is further prolonged; in the second aspect, partial ash is separated through the turning directions of the descending channel and the ascending channel, and the catalyst for secondary synthesis of dioxin is reduced; in the third aspect, the outlet temperature of the wrapping wall can be controlled to be about 500 ℃ by arranging the replacement hot surface in the ascending channel.

Furthermore, heat exchange surfaces (such as an air preheater and an economizer) can be properly arranged in the tail flue, so that the waste heat of the flue gas after quenching and temperature reduction is further recovered, and the efficiency of the boiler is improved.

Further, furnace, cyclone and feed back device can guarantee that the temperature is even in the furnace, and the burning is stable, can provide "3T" condition for the pyrolysis of dioxin, guarantees the decomposition of dioxin.

Compared with the prior art, the invention has the following advantages: the problem of the solid waste incineration boiler dioxin in the secondary synthesis of low temperature interval is solved, this contain circulating fluidized bed of rapid cooling device solid waste incineration boiler can realize reducing to the useless solid waste of general industry, possesses the boiler of good environmental protection nature again.

Drawings

FIG. 1 is a schematic structural diagram of a circulating fluidized bed solid waste incineration boiler with a quenching device according to an embodiment of the invention.

In the figure: the device comprises a hearth 1, a cyclone separator 2, a material returning device 3, a separator outlet flue 4, a wrapping wall 5, a quenching device 6, a tail flue 7, a spraying device 8, a quenching device inlet temperature measuring point 9 and a quenching device outlet temperature measuring point 10.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

Examples

Referring to fig. 1, it should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for understanding and reading the disclosure, and are not used for limiting the conditions that the present invention can be implemented, so they have no technical essence, and any structural modifications, ratio changes or size adjustments should fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle" and "one" are used for clarity of description, and are not used to limit the scope of the present invention, and the relative relationship between the terms and the relative positions may be changed or adjusted without substantial technical changes.

The circulating fluidized bed solid waste incineration boiler with the quenching device comprises a quenching spray automatic control system, a hearth 1, a cyclone separator 2, a material returning device 3, a separator outlet flue 4, a wrapping wall 5 and a tail flue 7, wherein the quenching spray automatic control system comprises a quenching device 6, a spraying device 8, a quenching device inlet temperature measuring point 9 and a quenching device outlet temperature measuring point 10.

In the embodiment, a hearth 1, a cyclone separator 2 and a material returning device 3 are sequentially and circularly connected, the cyclone separator 2, a separator outlet flue 4, a wrapping wall 5, a quenching device 6 and a tail flue 7 are sequentially connected, a spraying device 8 is arranged in the quenching device 6, an inlet temperature measuring point 9 of the quenching device and an outlet temperature measuring point 10 of the quenching device are respectively arranged at the inlet end and the outlet end of the quenching device 6, and the quenching device is characterized in that: the inlet temperature measuring point 9 of the quenching device, the spraying device 8 and the outlet temperature measuring point 10 of the quenching device are arranged in sequence.

The wrapping wall 5 in the embodiment comprises a descending channel and an ascending channel, the descending channel is connected with the ascending channel, the descending channel and the ascending channel are respectively connected with the separator outlet flue 4 and the quenching device 6, a heat exchange surface is arranged in the ascending channel, the heat exchange surface is a superheater or an evaporator, a heat exchange surface is arranged in the tail flue 7, and the heat exchange surface is an air preheater or an economizer.

The working method of the circulating fluidized bed solid waste incineration boiler with the quenching device in the embodiment comprises the following steps: the flue gas with the outlet temperature of 500 ℃ of the wrapping wall 5 enters the quenching device 6, the high-temperature flue gas is directly contacted with atomized spraying water mist in the quenching device 6, the flue gas can be contacted with the water mist within 1 second for evaporation and vaporization, the heat is rapidly released through heat exchange, so that the temperature of the flue gas is reduced from 500 ℃ to 200 ℃, and the resynthesis of dioxin-like substances is effectively avoided.

The spray device 8 in the embodiment can automatically track and adjust the water spraying amount of the water spraying gun according to the change of the outlet temperature measuring point 10 of the quenching device, so that the outlet temperature of the quenching device 6 is maintained in a proper temperature range, and the phenomenon of over-spraying or under-spraying is avoided; because compressed air is atomized in the spray gun, water is atomized into very fine fog drops, the fog drops are quickly evaporated in high-temperature flue gas to absorb a large amount of heat of the flue gas, so that the temperature of the flue gas is quickly reduced and maintained within a certain temperature range, and when the temperature of the flue gas at the outlet of the quenching device 6 is not within a set working range, a quenching system can automatically adjust relevant parameters such as water supply pressure, water spraying amount and the like, so that the temperature of the flue gas is ensured within the working range.

The wrapping wall 5 in the embodiment adopts a membrane type wall structure, the wrapping wall 5 is divided into an ascending channel and a descending channel, and on the first hand, the descending channel is internally provided with a cavity, so that the retention time of high-temperature flue gas of the boiler is further prolonged; in the second aspect, partial ash is separated through the turning directions of the descending channel and the ascending channel, and the catalyst for secondary synthesis of dioxin is reduced; in the third aspect, the outlet temperature of the enveloping wall 5 can be controlled to be about 500 ℃ by arranging the replacement hot face in the ascending channel.

In the embodiment, heat exchange surfaces (such as an air preheater and an economizer) can be properly arranged in the tail flue 7, so that flue gas waste heat after quenching and temperature reduction is further recovered, and the efficiency of the boiler is improved.

Furnace 1, cyclone 2 and feed back device 3 in this embodiment can guarantee that temperature is even in furnace 1, and the burning is stable, can provide "3T" condition for the pyrolysis of dioxin, guarantees the decomposition of dioxin.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.