Efficient water-cooling direct-discharge ash conveying system

Abstract

The invention discloses an efficient water-cooling direct-discharging ash conveying system which comprises a first flue, a second flue, a third flue, a water-cooling ash hopper, a transition connector, a manual gate valve, an electric double-layer flap valve, an expansion joint and an ash falling pipe. Ash discharging hoppers of a second flue and a third flue of the efficient water-cooling direct-discharging ash conveying system are arranged in a water-cooling mode, namely, water-cooling ash hoppers are arranged, transition connectors are installed at connectors of the water-cooling ash hoppers so that the water-cooling ash hoppers can be in butt joint with manual gate valves conveniently, and the manual gate valves, electric double-layer flap valves, expansion joints and ash falling pipes are sequentially in butt joint through the transition connectors. And finally, the ash is directly conveyed to a flue rear arch burnout section or above a slag well through an ash falling pipe. The method has the advantages that coking of the ash hopper is eradicated fundamentally, the hidden danger of ash blockage of the boiler is eliminated, meanwhile, the problems of blockage of the ash conveying machine and unplanned shutdown of the boiler caused by overload of the ash amount are avoided fundamentally, and long-term safe and stable operation of the boiler is guaranteed.

Description

Technical Field

[0001] This application belongs to the field of boiler technology, and in particular relates to a high-efficiency water-cooled direct discharge ash conveying system. Background Technology

[0002] Currently, with economic and social development, the demand for waste treatment continues to rise, and the scale of co-firing of industrial solid waste and sludge has also expanded, resulting in a significant increase in the amount of ash carried by flue gas after boiler combustion. The risks of coking in ash hoppers and blockage of ash conveying are becoming increasingly serious, which has become a technical problem that urgently needs to be solved. Summary of the Invention

[0003] The purpose of this application is to provide a high-efficiency water-cooled direct discharge ash conveying system to solve the technical problems of boiler coking and ash conveying blockage.

[0004] To achieve the above-mentioned objectives, the technical solution adopted in this application is as follows: A high-efficiency water-cooled direct discharge ash conveying system includes: a first flue, a second flue, a third flue, a water-cooled ash hopper, a transition interface, a manual slide valve, an electric double-layer flap valve, an expansion joint, and an ash discharge pipe; Water-cooled ash hoppers are installed below the second and third flues; transition interfaces are installed at the interfaces of the water-cooled ash hoppers, which are connected in sequence to a manual slide valve, an electric double-layer flap valve, an expansion joint, and an ash discharge pipe.

[0005] Optionally, the end of the ash discharge pipe points to the rear arch burnout section of a flue or above the slag well, for directly transporting ash and slag into a flue or slag well.

[0006] Optionally, the ash hopper wall of the water-cooled ash hopper is composed of dense water-cooled wall tubes, and a medium is circulated inside the water-cooled wall tubes to reduce the temperature of the ash slag.

[0007] Optionally, the transition interface, manual slide valve, electric double-layer flap valve, expansion joint and ash discharge pipe together form a direct ash discharge device.

[0008] Compared with the prior art, the beneficial effects of the embodiments of this application are: The present application provides a high-efficiency water-cooled direct discharge ash conveying system that can reduce the temperature of ash slag below its own ash melting point by using the medium in the ash hopper wall (e.g., the ash hopper wall is composed of dense water-cooled wall tubes). After the ash slag is fixed, it is not easy to stick to the tubes, thus eliminating the coking of ash hopper from the root and eliminating the hidden danger of boiler ash blockage. At the same time, it avoids the problems of ash conveyor blockage and unplanned boiler shutdown caused by ash overload from the root, thus ensuring the long-term safe and stable operation of boiler. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 A schematic diagram of a high-efficiency water-cooled direct discharge ash conveying system provided in an embodiment of this application is shown.

[0011] Illustration: 1. First flue; 2. Second flue; 3. Third flue; 4. Water-cooled ash hopper; 5. Transition interface; 6. Manual slide valve; 7. Electric double-layer flap valve; 8. Expansion joint; 9. Ash discharge pipe. Detailed Implementation

[0012] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0013] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0014] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0015] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0016] Please see Figure 1 As shown, this embodiment provides a high-efficiency water-cooled direct-discharge ash conveying system, including: a primary flue 1, a secondary flue 2, a tertiary flue 3, a water-cooled ash hopper 4, a transition interface 5, a manual slide gate valve 6, an electric double-layer flap valve 7, an expansion joint 8, and an ash discharge pipe 9. The transition interface 5, the manual slide gate valve 6, the electric double-layer flap valve 7, the expansion joint 8, and the ash discharge pipe 9 constitute the ash conveying device.

[0017] The lower ash hoppers of the second flue 2 and the third flue 3 adopt a water-cooled ash hopper 4 with a water-cooled arrangement. For example, the ash temperature can be reduced by the medium in the ash hopper wall (e.g., the ash hopper wall is composed of dense water-cooled wall tubes) of the water-cooled ash hopper 4, so that it is lower than its own ash melting point.

[0018] A transition interface 5 is installed at the water-cooled ash hopper 4 interface to facilitate connection with the manual slide valve 6. The transition interface 5 connects in sequence to the manual slide valve 6, the electric double-layer flap valve 7, the expansion joint 8, and the ash drop pipe 9. Finally, the ash is directly transported to the burnout section of the rear arch of the flue 1 or above the slag well through the ash drop pipe 9.

[0019] In the high-efficiency water-cooled direct discharge ash conveying system, the ash conveying system directly delivers ash and slag to the rear arch burnout section or above the slag well, eliminating the intermediate transfer link of the ash conveyor. This fundamentally avoids the problems of ash conveyor blockage and unplanned boiler shutdown caused by ash overload, thereby ensuring the long-term safe and stable operation of the boiler.

[0020] This embodiment provides a high-efficiency water-cooled direct discharge ash conveying system that eliminates coking in the ash hopper at the source, thereby eliminating the risk of boiler ash blockage. At the same time, it avoids the problems of ash conveyor blockage and unplanned boiler shutdown caused by ash overload, thus ensuring the long-term safe and stable operation of the boiler.

[0021] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A high-efficiency water-cooled direct-discharge ash conveying system, characterized in that, include: First flue, second flue, third flue, water-cooled ash hopper, transition interface, manual slide valve, electric double-layer flap valve, expansion joint and ash discharge pipe; The water-cooled ash hopper is located below the second and third flues; the transition interface is installed at the interface of the water-cooled ash hopper, and the transition interface is sequentially connected to the manual slide valve, the electric double-layer flap valve, the expansion joint and the ash discharge pipe.

2. The high-efficiency water-cooled direct discharge ash conveying system according to claim 1, characterized in that: The end of the ash discharge pipe points to the rear arch burnout section of the flue or above the slag well, and is used to directly transport ash and slag into the flue or slag well.

3. The high-efficiency water-cooled direct discharge ash conveying system according to claim 1, characterized in that: The ash hopper wall is composed of dense water-cooled wall tubes, and a medium is circulated inside the water-cooled wall tubes to reduce the temperature of the ash slag.

4. The high-efficiency water-cooled direct discharge ash conveying system according to claim 1, characterized in that: The transition interface, the manual slide valve, the electric double-layer flap valve, the expansion joint, and the ash discharge pipe together form a direct ash discharge device.

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