Smoke waste heat boiler matched with dust removal and denitration engineering of limestone mine rotary kiln

Abstract

The utility model discloses a limestone mine rotary kiln dust removal and denitration project matched flue gas waste heat boiler, which relates to the technical field of waste heat boilers, and comprises a boiler body, the boiler body comprises a heating surface flue, the heating surface flue adopts a tube-box integrated structure, and an evaporator I, an evaporator II, an evaporator III and a coal economizer are sequentially arranged in the heating surface flue from bottom to top. A boiler is arranged at the top of the heating surface of the heating surface flue, the upper portion of the boiler is connected with a main steam connector, a smoke inlet is formed in the bottom end of the heating surface flue, and a smoke outlet is formed in the top end of the heating surface flue. According to the utility model, the boiler body adopts the design of natural circulation and open-air vertical arrangement, so that smoke can sequentially scour the evaporator I, the evaporator II, the evaporator III and a heating surface pipe in the economizer for heat convection after entering the heating surface flue through the smoke inlet at the bottom, and finally the smoke reaching the standard is discharged from the smoke outlet at the top. The waste heat boiler is compact in structure, small in occupied space and practical.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat boilers, and particularly relates to a flue gas waste heat boiler for supporting a limestone mine rotary kiln dust removal and denitration project. Background Art

[0002] A waste heat boiler is a boiler that uses the waste heat in waste liquid and the heat generated after the combustion of combustible substances therein to heat water to a certain working medium; the waste heat boiler can produce hot water or steam through waste heat recovery for use in other sections; since the waste heat boiler greatly improves the utilization rate of the heat released by fuel combustion, this type of boiler is very energy-saving; however, the waste heat boiler of traditional technology has a relatively complex structure, resulting in a relatively large overall volume, occupying a large amount of floor space, and being inconvenient for on-site installation and use. Content of the Utility Model

[0003] The purpose of the utility model is to provide a flue gas waste heat boiler for supporting a limestone mine rotary kiln dust removal and denitration project to solve the problems raised in the above background art.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A flue gas waste heat boiler for supporting a limestone mine rotary kiln dust removal and denitration project includes a boiler body. The boiler body includes a heating surface flue. The heating surface flue adopts a tube bank integrated type. An I evaporator, a II evaporator, a III evaporator, and an economizer are sequentially arranged in the heating surface flue from bottom to top. A boiler is arranged at the top of the heating surface of the heating surface flue. A main steam interface is connected to the upper part of the boiler. A flue gas inlet is arranged at the bottom end of the heating surface flue, and a flue gas outlet is arranged at the top end of the heating surface flue.

[0006] Preferably, the heating surface flue includes a first tube bank and a second tube bank. The second tube bank is arranged above the first tube bank. It is convenient for flue gas to wash the first tube bank and the second tube bank in sequence.

[0007] Preferably, the I evaporator and the II evaporator are arranged in the first tube bank, and the III evaporator and the economizer are arranged in the second tube bank. It promotes the flue gas to wash the I evaporator, the II evaporator, the III evaporator, and the economizer in sequence.

[0008] Preferably, the first tube bank and the second tube bank are respectively composed of heat exchange surface tubes, headers, tube sheets, side plates, and sealing boxes to form an integral whole. It promotes the tube system, the header, and the guard plate to be integrated for factory shipment, and is convenient and fast for on-site installation.

[0009] Preferably, the heat exchange surface tubes adopt a spiral finned tube structure with horizontal staggered arrangement.

[0010] Preferably, the boiler body further includes a steel frame for support, and the heating surface flue is fixedly connected to the ground through the steel frame to ensure the installation stability of the heating surface flue and the boiler body.

[0011] Preferably, a rain shelter is provided above the boiler, and the rain shelter is connected to the steel frame. It is used to shield the boiler from rain, avoid corrosion of the boiler, and improve its service life.

[0012] Preferably, sonic sootblowers are respectively provided on the first tube bank and the second tube bank. It is used to blow the dust away with the flue gas flow or, under the action of gravity, settle into the ash hopper and be discharged.

[0013] Preferably, a ash hopper is connected to the bottom of the heating surface flue for discharging dust.

[0014] Due to the adoption of the above technical solutions, the technical progress achieved by the present utility model compared with the prior art is as follows:

[0015] 1. The present utility model provides a flue gas waste heat boiler for supporting the dust removal and denitration project of a limestone mine rotary kiln. In order to solve the problems of complex structure and large floor area of traditional waste heat boilers. Through the design of the boiler body adopting the natural circulation method and open-air vertical layout, after the flue gas enters the heating surface flue through the bottom flue gas inlet, it can sequentially wash the heating surface tubes in the I evaporator, II evaporator, III evaporator, and economizer for convective heat transfer, and finally discharge the qualified flue gas from the top flue gas outlet, realizing the functions of a compact waste heat boiler with a small footprint, which is relatively practical.

[0016] 2. The present utility model provides a flue gas waste heat boiler for supporting the dust removal and denitration project of a limestone mine rotary kiln. In order to solve the problem that the on-site installation and use of traditional waste heat boilers are not convenient, the heating surface flue tube system, header and guard plate are factory-assembled as a whole, effectively improving the efficiency during on-site installation, which is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structural schematic diagram of the present utility model;

[0018] Figure 2 is the side view structural schematic diagram of the present utility model;

[0019] Figure 3 is the structural schematic diagram of the first tube bank of the present utility model;

[0020] Figure 4 is the structural schematic diagram of the sonic sootblower of the present utility model.

[0021] In the figure: 100, boiler body; 101, steel frame;

[0022] 1. Heating surface flue; 2. I evaporator; 3. II evaporator; 4. III evaporator; 5. Economizer; 6. Boiler; 7. Main steam interface; 8. Flue gas inlet; 9. Flue gas outlet; 10. First tube header; 11. Second tube header; 12. Rain shelter; 13. Spiral finned tube; 14. Sonic soot blower. Detailed implementation mode

[0023] The following further elaborates on the present utility model in conjunction with embodiments:

[0024] As Figures 1-4 shown, the present utility model provides a flue gas waste heat boiler for supporting a limestone mine rotary kiln dust removal and denitration project, which includes a boiler body 100. The boiler body 100 includes a heating surface flue 1. The heating surface flue 1 adopts an integral tube header structure, and an I evaporator 2, a II evaporator 3, a III evaporator 4, and an economizer 5 are sequentially arranged in the heating surface flue 1 from bottom to top. A boiler 6 is provided at the top of the heating surface of the heating surface flue 1. A main steam interface 7 is connected to the upper part of the boiler 6. A flue gas inlet 8 is provided at the bottom end of the heating surface flue 1, and a flue gas outlet 9 is provided at the top end of the heating surface flue 1.

[0025] As Figure 1 , Figure 3 , Figure 4 shown, the heating surface flue 1 includes a first tube header 10 and a second tube header 11. The second tube header 11 is arranged above the first tube header 10. The I evaporator 2 and the II evaporator 3 are arranged in the first tube header 10. The III evaporator 4 and the economizer 5 are arranged in the second tube header 11. Sonic soot blowers 14 are respectively provided on the first tube header 10 and the second tube header 11. A dust hopper is connected to the bottom of the heating surface flue 1. The design of the sonic soot blower 14 is used to blow the dust away with the flue gas flow, or under the action of gravity, it sinks to the dust hopper and is discharged. And the technology of the sonic soot blower 14 is to convert compressed air or steam into high-power sound waves or infrasound waves, a pressure wave that propagates in the space medium gas in the form of density waves.

[0026] Furthermore, the first tube header 10 and the second tube header 11 are respectively composed of heat exchange surface tubes, headers, tube sheets, side plates, and sealing boxes to form an integral structure. The heat exchange surface tubes adopt a spiral finned tube 13 structure with horizontal staggered arrangement.

[0027] As Figure 1 , Figure 2 shown, the boiler body 100 further includes a steel frame body 101 for support. The heating surface flue 1 is fixedly connected to the ground through the steel frame body 101. A rain shelter 12 is arranged above the boiler 6. The rain shelter 12 is connected to the steel frame body 101, ensuring the installation stability of the heating surface flue 1, the boiler body 100, and the rain shelter 12, and at the same time avoiding the problem that the boiler 6 is easily corroded and improving the service life of the boiler 6.

[0028] The working principle of the high-solid-waste brine filtration device will be specifically described below.

[0029] As Figures 1-4 shown, after the flue gas enters the heating surface flue 1 through the bottom flue gas inlet 8, it can successively wash the heating surface tubes in the I evaporator 2, II evaporator 3, III evaporator 4, and economizer 5 for convective heat transfer, reducing the flue gas temperature to the exhaust gas temperature and then discharging the qualified flue gas from the top flue gas outlet 9. During this period, by using the sonic soot blower 14, the ash in the flue gas can be discharged from the heating surface flue 1 through the bottom settling ash hopper. This boiler body 100 adopts a natural circulation method and an open vertical layout, with a compact structure and small floor area, effectively solving the problems of complex structure and large floor area of traditional waste heat boilers. At the same time, because the pipe system and header of the heating surface flue 1 and the guard plate are factory-assembled as a whole, the on-site installation is convenient and fast.

[0030] It should be noted that in the description of the present disclosure, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0031] The above has generally described the present invention in detail, but based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the art. Therefore, the modifications or improvements made without departing from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A flue gas waste heat boiler for limestone rotary kiln dust removal and denitrification project, comprising a boiler body, the boiler body comprising a heating surface flue, characterized in that: The heating surface flue adopts an integrated pipe-box type, and the heating surface flue is provided with I evaporator, II evaporator, III evaporator and economizer from bottom to top in sequence. A boiler is provided on the top of the heating surface of the heating surface flue, and the upper part of the boiler is connected to the main steam interface. A flue gas inlet is provided at the bottom end of the heating surface flue, and a flue gas outlet is provided at the top end of the heating surface flue.

2. The flue gas waste heat boiler for limestone rotary kiln dust removal and denitrification project according to claim 1 is characterized in that: The heating surface flue comprises a first pipe box and a second pipe box, wherein the second pipe box is arranged above the first pipe box.

3. The flue gas waste heat boiler for limestone rotary kiln dust removal and denitrification project according to claim 2 is characterized in that: The I evaporator and the II evaporator are arranged in the first pipe box, and the III evaporator and the economizer are arranged in the second pipe box.

4. The flue gas waste heat boiler for limestone rotary kiln dust removal and denitrification project according to claim 2 is characterized in that: The first tube box and the second tube box are respectively formed into an integral type by heat exchange surface tubes, a header, a tube sheet, a side plate and a sealing box.

5. The flue gas waste heat boiler for limestone rotary kiln dust removal and denitrification project according to claim 4 is characterized in that: The heat exchange surface tubes adopt a spiral fin tube structure arranged in a horizontal staggered manner.

6. The flue gas waste heat boiler for limestone rotary kiln dust removal and denitrification project according to claim 1, characterized in that: The boiler body also includes a steel frame for support, and the heating surface flue is fixedly connected to the ground through the steel frame.

7. The flue gas waste heat boiler for limestone rotary kiln dust removal and denitrification project according to claim 6, characterized in that: A rainproof shed is arranged above the boiler and is connected to the steel frame.

8. The flue gas waste heat boiler for limestone rotary kiln dust removal and denitrification project according to claim 2, characterized in that: The first pipe box and the second pipe box are respectively provided with sonic soot blowers.

9. The flue gas waste heat boiler for limestone rotary kiln dust removal and denitrification project according to claim 1, characterized in that: The bottom of the heating surface flue is connected with an ash hopper.

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