Waste incineration waste heat boiler with combined pre-dedusting system

Abstract

The utility model discloses a waste incineration waste heat boiler with a combined pre-dedusting system, which comprises an incinerator, a hearth, a horizontal flue, an evaporator system, a superheater system, a groove beam separator, a turning flue, an economizer system, a tail flue, a cyclone separator, a recycled flue gas collecting box and an ash conveying system, and the trough beam separator and the cyclone separator form a combined pre-dedusting system. According to the waste incineration waste heat boiler with the combined dust pre-removal system, the dust content of smoke entering the economizer can be reduced, dust accumulated on the heating surface is reduced, and the rated smoke exhaust temperature is maintained for a long time, so that the overall heat efficiency of the boiler is improved, meanwhile, the non-stop frequency of the economizer caused by pipe explosion due to dust accumulation is reduced, and the energy consumption of the boiler is reduced. Safer and efficient operation of the boiler is ensured; and the generation of nitrogen oxides can be reduced, the amount of ash entering a cloth bag dust removal part is reduced, the flue gas treatment operation cost is greatly reduced, and the ultimate target of energy conservation and emission reduction of the boiler is achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of boilers, and in particular relates to a waste incineration waste heat boiler with a combined pre-dust removal system. Background Art

[0002] At present, with the development of cities and the increase in population, the amount of urban domestic waste generated is showing a straight upward trend. Therefore, the problem of domestic waste disposal is becoming increasingly severe. How to deal with these domestic wastes efficiently, energy-saving and environmentally friendly is the key to the profitable development of all waste incineration companies. Utility Model Content

[0003] The present application provides a waste incineration waste heat boiler with a combined pre-dust removal system, which removes part of the dust in the furnace flue gas in advance and realizes flue gas recirculation, which can effectively reduce the dust on the heating surface, reduce the generation of nitrogen oxides, and reduce the amount of ash entering the bag dust collector, greatly reducing the flue gas treatment operating costs, solving a series of problems such as high-temperature corrosion and pipe burst, and has obvious advantages in energy conservation and emission reduction.

[0004] In order to achieve the above application purpose, the technical solution adopted in this application is as follows:

[0005] The embodiment of the present application provides a waste incineration waste heat boiler with a combined pre-dust removal system, including an incinerator, a furnace, a horizontal flue, an evaporator system, a superheater system, a trough beam separator, a turning flue, an economizer system, a tail flue, a cyclone separator, a recirculating flue gas collection box and an ash conveying system, wherein the trough beam separator and the cyclone separator constitute a combined pre-dust removal system;

[0006] The evaporator system and the superheater system are arranged in the horizontal flue in sequence, the trough beam separator is arranged at the front end of the turning flue, the economizer system is arranged in the turning flue, and the cyclone separator is arranged at the rear side of the outside of the tail flue;

[0007] An ash hopper is arranged at the bottom of the trough beam separator, and the ash in the ash hopper is transported to the slag pit through the ash conveying system;

[0008] The cyclone separator is used to separate the hot flue gas extracted from the middle of the economizer system by the hot air blower. The separated ash is transported to the slag pit through the ash conveying system, and the separated clean flue gas is sent to the recirculating flue gas collection box or the flue gas outlet.

[0009] Optionally, the furnace includes a first furnace, a second furnace and a third furnace which are connected in sequence, and the third furnace is connected to the horizontal flue.

[0010] Optionally, the ash conveying system includes an ash dropping pipe, an ash discharge valve, an expansion joint and an ash conveyor.

[0011] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0012] The embodiment of the present application provides a waste incineration waste heat boiler with a combined pre-dust removal system, which can reduce the dust content of the flue gas entering the economizer, reduce the dust on the heated surface, and maintain the rated flue gas temperature for a long time, thereby improving the overall thermal efficiency of the boiler, while reducing the number of non-stop operations caused by tube bursting due to dust accumulation in the economizer, ensuring safer and more efficient operation of the boiler; and can reduce the generation of nitrogen oxides, reduce the amount of ash entering the bag dust collector, greatly reduce the flue gas treatment operating costs, and achieve the ultimate goal of energy conservation and emission reduction of the boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 A schematic structural diagram of a waste incineration waste heat boiler with a combined pre-dust removal system provided in an embodiment of the present application is shown.

[0015] Illustration Description:

[0016] 1. Incinerator; 2. First furnace; 3. Second furnace; 4. Third furnace; 5. Horizontal flue; 6. Evaporator system; 7. Superheater system; 8. Trough beam separator; 9. Turning flue; 10. Economizer system; 11. Tail flue; 12. Cyclone separator; 13. Recirculating flue gas collection box; 14. Ash conveying system. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0018] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0020] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0021] like Figure 1 As shown, an embodiment of the present application provides a waste incineration waste heat boiler with a combined pre-dust removal system, including an incinerator 1, a furnace, a horizontal flue 5, an evaporator system 6, a superheater system 7, a trough beam separator 8, a turning flue 9, an economizer system 10, a tail flue 11, a cyclone separator 12, a recycled flue gas collection box 13 and an ash conveying system 14. The trough beam separator 8 and the cyclone separator 12 constitute a combined pre-dust removal system.

[0022] The boiler flue is composed of a horizontal flue 5, a curved flue 9, and a tail flue 11. The boiler flue is provided with an evaporator system 6, a superheater system 7, a trough beam separator 8, and an economizer system 10 in sequence along the flue gas direction.

[0023] As an example, the evaporator system 6 and the superheater system 7 are arranged in the horizontal flue 5 in sequence, the trough beam separator 8 is arranged at the front end of the turning flue 9, the economizer system 10 is arranged in the turning flue 9, and the cyclone separator 12 is arranged on the outer rear side of the tail flue 11.

[0024] As an example, two lower ash hoppers are provided at the bottom of the trough beam separator 8, and the ash in the lower ash hopper is transported to the slag pit through the ash conveying system 14. For example, the ash is sent to the lower ash conveyor through the ash pipe, ash discharge valve, and expansion joint, and then transported to the slag pit through the ash conveyor.

[0025] As an example, the cyclone separator 12 is used to separate the hot flue gas extracted from the middle of the economizer system 10 by the hot air blower, and the separated ash is transported to the slag pit through the ash conveying system 14, and the separated clean flue gas is sent to the recirculating flue gas collection box 13 or the flue gas outlet. For example, the separated ash is sent into the ash conveyor through the ash conveyor through the ash pipe, ash discharge valve, and expansion joint, and then transported to the slag pit through the ash conveyor. For example, after the hot flue gas is dust-removed by the cyclone separator 12, the 'clean' hot flue gas (clean flue gas after separation) can be sent to the air supply system of the incinerator 1 through the flue gas pipeline through the recirculating flue gas collection box 13, or it can be directly sent to the flue gas outlet.

[0026] As an example, the furnace includes a first furnace 2 , a second furnace 3 and a third furnace 4 which are connected in sequence, and the third furnace 4 is connected to a horizontal flue 5 .

[0027] The above-mentioned waste incineration waste heat boiler with combined pre-dust removal system, the trough beam separator 8 in the combined pre-dust removal system utilizes inertia and gravity to separate large-size ash in the flue gas, which can reduce the dust content of the flue gas entering the economizer system 10, reduce the ash on the heating surface, and maintain the rated flue gas temperature for a long time, thereby realizing the overall thermal efficiency improvement of the boiler, and at the same time reducing the number of non-stop times of the economizer system 10 caused by ash accumulation and pipe bursting, thereby ensuring safer and more efficient operation of the boiler.

[0028] The above-mentioned waste incineration waste heat boiler with combined pre-dust removal system, the relatively clean flue gas separated by the cyclone separator 12 is used for flue gas recycling, and is led out from the top of the cyclone separator 12 and sent into the furnace combustion area again, so as to achieve the purpose of reducing the generation of nitrogen oxides; at the same time, the ash discharged from the lower end of the cyclone separator 12 enters the slag well through the ash conveying system 14, which reduces the amount of ash entering the bag dust collector, greatly reduces the flue gas treatment operation cost, and achieves the ultimate goal of energy saving and emission reduction of the boiler.

[0029] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A waste incineration waste heat boiler with a combined pre-dust removal system, characterized in that: It includes an incinerator, a furnace, a horizontal flue, an evaporator system, a superheater system, a trough beam separator, a turning flue, an economizer system, a tail flue, a cyclone separator, a recirculating flue gas collection box and an ash conveying system, wherein the trough beam separator and the cyclone separator constitute the combined pre-dust removal system; The evaporator system and the superheater system are sequentially arranged in the horizontal flue, the trough beam separator is arranged at the front end of the turning flue, the economizer system is arranged in the turning flue, and the cyclone separator is arranged at the rear side of the outside of the tail flue; A lower ash hopper is arranged at the lower part of the trough beam separator, and the ash in the lower ash hopper is transported to the slag pit through the ash conveying system; The cyclone separator is used to separate the hot flue gas extracted from the middle of the economizer system by the hot air blower. The separated ash is transported to the slag pit through the ash conveying system, and the separated clean flue gas is sent to the recycled flue gas collection box or the flue gas outlet.

2. The waste incineration waste heat boiler with a combined pre-dust removal system according to claim 1, characterized in that: The furnace comprises a first furnace, a second furnace and a third furnace which are connected in sequence, and the third furnace is connected to the horizontal flue.

3. The waste incineration waste heat boiler with a combined pre-dust removal system according to claim 1, characterized in that: The ash conveying system comprises an ash dropping pipe, an ash discharge valve, an expansion joint and an ash conveying machine.

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