Modularized combined type garbage incineration boiler air preheater

Abstract

The utility model discloses a modular combined type waste incineration boiler air preheater which comprises two independent modules including a steam preheater and a flue gas preheater, and the steam preheater module is provided with a primary air inlet, a steam preheater outlet, a flue gas preheater inlet porous plate and a heat exchanger; the flue gas preheater module is provided with a flue gas preheater inlet, a flue gas preheater outlet and a flue gas preheater coiled pipe, one end of the flue gas preheater coiled pipe is in butt joint with the flue gas preheater inlet porous plate, and the other end of the flue gas preheater coiled pipe is a hot air outlet; incinerator flue gas is used for entering from an inlet of the flue gas preheater so as to wash a coiled pipe of the flue gas preheater and flowing out from an outlet of the flue gas preheater. According to the modularized combined type waste incineration boiler air preheater, the primary air temperature can be increased, the problem of unstable combustion caused by waste heat value fluctuation, season alternation and the like is solved, modularized design and manufacturing are achieved, building block type combined use is achieved, the structure is compact, installation is convenient, and space is saved.

Description

Technical Field

[0001] The present application belongs to the technical field of boilers, and in particular relates to a modular combined waste incineration boiler air preheater. Background Art

[0002] At present, counties are in urgent need of miniaturized equipment for garbage disposal. On the one hand, the cost of garbage incineration-related equipment remains high. On the other hand, due to fluctuations in the calorific value of garbage and seasonal changes, combustion is unstable. It is necessary to increase the primary air temperature to help stabilize the combustion conditions. At the same time, it is necessary to reduce costs in all aspects and simplify the structure as much as possible. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned technical problems and provide a modular combined air preheater for a garbage incineration boiler.

[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 modular combined waste incineration boiler air preheater, comprising two independent modules, a steam preheater and a flue gas preheater, wherein the steam preheater module is fixed on the flue gas preheater module;

[0006] The steam preheater module is provided with a primary air inlet, a steam preheater outlet, a flue gas preheater inlet perforated plate, and a heat exchanger located between the primary air inlet and the steam preheater outlet, the heat exchanger being used to preheat the primary air;

[0007] The flue gas preheater module is provided with a flue gas preheater inlet, a flue gas preheater outlet, and a flue gas preheater serpentine tube located between the flue gas preheater inlet and the flue gas preheater outlet. One end of the flue gas preheater serpentine tube is butted with the flue gas preheater inlet porous plate, and the other end of the flue gas preheater serpentine tube is a hot air outlet for sending hot air into the incinerator to assist combustion.

[0008] The incinerator flue gas is used to enter from the flue gas preheater inlet to flush the flue gas preheater serpentine pipe, and flow out from the flue gas preheater outlet.

[0009] Optionally, the heat exchanger is a finned serpentine tube, and steam flows through the finned serpentine tube.

[0010] Optionally, the flue gas preheater serpentine pipe is also connected to an air duct mother pipe.

[0011] Optionally, the steam preheater module is further provided with a steam preheater air duct guard plate, and the flue gas preheater module is further provided with a flue gas preheater guard plate.

[0012] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0013] The modular combined waste incineration boiler air preheater provided in the embodiment of the present application can increase the primary air temperature and solve the problem of unstable combustion caused by fluctuations in waste calorific value and seasonal changes. It is modularly designed and manufactured, and used in a building block-like combination. It has a compact structure, is easy to install, and saves space. With this structure, the boiler has stronger adaptability and truly meets the normal operation requirements of low load. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 A schematic structural diagram of a modular combined waste incineration boiler air preheater provided in an embodiment of the present application is shown.

[0016] Illustration Description:

[0017] 1. Primary air inlet; 2. Steam preheater outlet; 3. Flue gas preheater inlet porous plate; 4. Hot air outlet; 5. Flue gas preheater inlet; 6. Flue gas preheater outlet; 7. Steam preheater duct guard plate; 8. Finned serpentine tube; 9. Flue gas preheater serpentine tube; 10. Flue gas preheater guard plate; 11. Duct mother pipe. DETAILED DESCRIPTION

[0018] 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.

[0019] 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.

[0020] 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.

[0021] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0022] See also Figure 1 As shown, a modular combined waste incineration boiler air preheater includes two independent modules, a steam preheater and a flue gas preheater. As an example, the steam preheater module and the flue gas preheater module are combined in a building block style, for example, the steam preheater module is directly fixed on the flue gas preheater module.

[0023] Specifically, the steam preheater module is provided with a primary air inlet 1, a steam preheater outlet 2, a flue gas preheater inlet porous plate 3, and a heat exchanger located between the primary air inlet 1 and the steam preheater outlet 2, and the heat exchanger is used to preheat the primary air (cold air). For example, the primary air (cold air) enters from the primary air inlet 1. The preheated air flows out from the steam preheater outlet 2 and flows to the flue gas preheater module through the flue gas preheater inlet porous plate 3. For example, the heat exchanger is a finned serpentine tube 8, and steam is passed through the finned serpentine tube 8.

[0024] Specifically, the flue gas preheater module is provided with a flue gas preheater inlet 5, a flue gas preheater outlet 6, and a flue gas preheater serpentine tube 9 located between the flue gas preheater inlet 5 and the flue gas preheater outlet 6. One end of the flue gas preheater serpentine tube 9 is connected to the flue gas preheater inlet porous plate 3, and the other end of the flue gas preheater serpentine tube 9 is a hot air outlet 4, which is used to send hot air into the incinerator to assist combustion. The flue gas preheater serpentine tube 9 is used to heat the incoming air of the flue gas preheater inlet porous plate 3. As an example, the flue gas preheater serpentine tube 9 is also connected to the air duct mother pipe 11.

[0025] The incinerator flue gas is used to enter from the flue gas preheater inlet 5 to flush the flue gas preheater serpentine tube 9 and flow out from the flue gas preheater outlet 6. The flue gas preheater serpentine tube 9 is flushed and heated by the incinerator flue gas, so that the flue gas preheater serpentine tube 9 can heat the inlet air of the flue gas preheater inlet porous plate 3. The incinerator flue gas after heat exchange is sent out from the flue gas preheater outlet 6.

[0026] Therefore, the working principle of the above modular combined waste incineration boiler air preheater is:

[0027] (1) Primary air (cold air) enters the steam preheater module from the primary air inlet 1, then exchanges heat with the steam in the finned serpentine 8, reaches the steam preheater outlet 2, then enters the flue gas preheater inlet porous plate 3, then absorbs the heat of the high-temperature flue gas in the flue gas preheater serpentine 9, and finally is sent out from the hot air outlet 4 to enter the incinerator to assist combustion.

[0028] (2) The incinerator flue gas is sent from the flue gas preheater inlet 5 to the flue gas preheater serpentine pipe 9 for flushing, and is sent out from the flue gas preheater outlet 6 after heat exchange.

[0029] In some embodiments, the steam preheater module is further provided with a steam preheater air duct guard plate 7 , and the flue gas preheater module is further provided with a flue gas preheater guard plate 10 .

[0030] In summary, the modular combined waste incineration boiler air preheater provided in the embodiment of the present application is composed of two independent modules, a steam preheater and a flue gas preheater, and is composed of a building block combination structure. The steam preheater module and the flue gas preheater module are respectively manufactured according to modular design and transported to the construction site as a whole. The steam preheater module is directly fixed on the flue gas preheater module, and the hot air of the steam preheater directly enters the flue gas preheater heating surface pipe. There is no need to set up a separate connecting air duct, which can increase the primary air temperature and solve the problem of unstable combustion caused by fluctuations in the calorific value of garbage and seasonal changes. It is modularly designed and manufactured, and used in a building block combination. It has a compact structure, is easy to install, saves space, and is convenient for maintenance and operation. With this structure, the boiler has stronger adaptability and truly meets the normal operation requirements of low load.

[0031] 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 modular combined waste incineration boiler air preheater, characterized in that: It includes two independent modules, a steam preheater and a flue gas preheater, and the steam preheater module is fixed on the flue gas preheater module; The steam preheater module is provided with a primary air inlet, a steam preheater outlet, a flue gas preheater inlet perforated plate, and a heat exchanger located between the primary air inlet and the steam preheater outlet, wherein the heat exchanger is used to preheat the primary air; The flue gas preheater module is provided with a flue gas preheater inlet, a flue gas preheater outlet, and a flue gas preheater serpentine tube located between the flue gas preheater inlet and the flue gas preheater outlet, one end of the flue gas preheater serpentine tube is butt-jointed with the flue gas preheater inlet porous plate, and the other end of the flue gas preheater serpentine tube is a hot air outlet for sending hot air into the incinerator to assist combustion; The incinerator flue gas is used to enter from the flue gas preheater inlet to flush the flue gas preheater serpentine pipe, and flow out from the flue gas preheater outlet.

2. The modular combined waste incineration boiler air preheater according to claim 1 is characterized in that: The heat exchanger is a finned serpentine tube, and steam is passed through the finned serpentine tube.

3. The modular combined waste incineration boiler air preheater according to claim 1 is characterized in that: The flue gas preheater serpentine pipe is also connected to an air duct main pipe.

4. The modular combined waste incineration boiler air preheater according to claim 1, characterized in that: The steam preheater module is also provided with a steam preheater air duct guard plate, and the flue gas preheater module is also provided with a flue gas preheater guard plate.

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