Environment-friendly and energy-saving lime kiln

Abstract

The utility model relates to the field of lime kilns, and discloses an environment-friendly and energy-saving lime kiln furnace which comprises a furnace base, a furnace body is arranged above the furnace base, a smoke pipe is arranged on the upper portion of the furnace body, the end of the smoke pipe is connected with a tail gas treatment mechanism, and the tail gas treatment mechanism comprises a dust removal assembly, an air preheating assembly and an acid gas adsorption assembly. The dedusting assembly comprises a dedusting box, a filter screen is mounted in the dedusting box, and a cleaning assembly is arranged on one side of the filter screen; the air preheating assembly comprises a heat exchange box, a heat exchange box is installed in the heat exchange box, and ventilation pipes are fixedly connected to the front end and the rear end. The acid gas adsorption assembly comprises a treatment box, two sponge plates are installed in the treatment box, a medicament box is arranged above the treatment box, two branch pipes are connected to the lower portion of the side face of the medicament box through liquid guide pipes, a plurality of drippers are fixedly connected to the bottoms of the branch pipes, and an exhaust pipe is fixedly connected to one end of the treatment box. According to the utility model, flue gas purification is realized, air entering the furnace body can be preheated, and the environmental protection performance of the lime kiln furnace is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of lime kilns, in particular to an environmentally friendly and energy-saving lime kiln. Background Art

[0002] A lime kiln is an industrial furnace used to produce lime (calcium oxide, CaO) by calcining limestone (calcium carbonate, CaCO3).

[0003] In the prior art, for example, the utility model patent with publication number CN202157013U discloses a new environmentally friendly and energy-saving lime kiln. The kiln is upright as a whole and is divided into seven parts from top to bottom: a kiln mouth zone, a preheating zone, a calcining zone, a cooling zone, a ash discharge zone, a base, and a foundation. This environmentally friendly and energy-saving lime shaft kiln has been rapidly promoted in China due to its superior energy-saving features, high-standard environmental protection indicators, a highly efficient production method with fully automated operation, the guarantee of producing high-quality lime, and an excellent performance-price ratio, and has generated considerable economic and social benefits.

[0004] However, in actual production applications, although the kiln has excellent energy-saving effects, the flue gas it emits contains a variety of impurities, such as dust particles, sulfur dioxide, nitrogen oxides, etc. These impurities will cause environmental pollution if directly discharged into the environment. In addition, the flue gas it emits also contains a large amount of heat, which is relatively wasteful. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing lime kiln is not convenient for treating flue gas, and the flue gas also contains a large amount of heat, which is relatively wasteful.

[0006] In order to solve the above problems, the technical solution of the utility model is as follows: an environmentally friendly and energy-saving lime kiln, comprising a furnace base, a furnace body is arranged above the furnace base, a smoke pipe is arranged on the upper part of the furnace body, and the end of the smoke pipe is connected to an exhaust gas treatment mechanism, the exhaust gas treatment mechanism includes a dust removal component, an air preheating component and an acid gas adsorption component;

[0007] The dust removal assembly includes a dust removal box, a filter is installed inside the dust removal box, a cleaning assembly is provided on one side of the filter, the air inlet end of the dust removal box is connected to the smoke pipe, and the air outlet end is connected to the air preheating assembly through a conduit;

[0008] The air preheating assembly includes a heat exchange box, a heat exchange box is installed inside the heat exchange box, and ventilation pipes are fixedly connected to the front and rear ends. The ventilation pipe at the rear end is connected to the furnace body through a second conduit. The first conduit is connected to the front upper part of the heat exchange box, and the rear lower part of the heat exchange box is connected to the acid gas adsorption assembly through a third conduit.

[0009] The acid gas adsorption assembly includes a treatment box connected to the three phases of the conduit, two sponge plates are installed inside the treatment box through two positioning frames, a medicine box is provided above the treatment box, and two branch pipes are connected to the lower side of the medicine box through a liquid guide tube. The branch pipes are located above the sponge plates, and multiple drippers extending into the interior of the treatment box are fixed to the bottom of the branch pipes. An exhaust pipe is fixed to the end of the treatment box away from the three conduits.

[0010] Furthermore, the filter screen is an arc-shaped structure, a collecting hopper is provided at the bottom of the dust removal box, and a sealing cover is provided at the bottom of the collecting hopper.

[0011] Furthermore, the cleaning assembly includes a rotating shaft rotatably mounted on the inner wall of the dust removal box, a plurality of cleaning brushes are mounted on the rotating shaft, and a hand wheel is mounted on one end of the rotating shaft after passing through the side wall of the dust removal box.

[0012] Furthermore, a plurality of heat conducting plates are fixedly connected around the periphery of the heat exchange box.

[0013] Furthermore, the positioning frame is an inverted U-shaped structure, and a drainage pipe is provided at the lower part of the side of the processing box.

[0014] Furthermore, valves are installed on both the liquid guiding tube and the liquid draining tube.

[0015] Compared with the existing technology, the advantages of the present invention are as follows: the present invention filters the dust particles in the flue gas through the filter; preheats the air entering the furnace body through the heat exchange box, thereby improving the combustion efficiency and reducing fuel consumption; and the acid gas in the flue gas is adsorbed by the treatment box; thereby achieving the purification of the flue gas and effectively improving the environmental protection performance of the lime kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the present utility model.

[0017] Figure 2 It is a cross-sectional view of the dust removal box of the utility model.

[0018] Figure 3 It is a cross-sectional view of the heat exchange box of the present utility model.

[0019] Figure 4 It is a cross-sectional view of the processing box of the utility model.

[0020] As shown in the figure: 1. Furnace base; 2. Furnace body; 3. Smoke pipe; 4. Dust removal box; 5. Filter; 6. Collecting hopper; 7. Rotating shaft; 8. Cleaning brush; 9. Hand wheel; 10. Conduit one; 11. Heat exchange box; 12. Heat exchange box; 13. Ventilation pipe; 14. Conduit two; 15. Heat conducting plate; 16. Conduit three; 17. Processing box; 18. Sponge board; 19. Chemical box; 20. Liquid guide tube; 21. Branch pipe; 22. Drip head; 23. Exhaust pipe; 24. Drain pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0022] like Figure 1 As shown, an environmentally friendly and energy-saving lime kiln includes a furnace base 1, a furnace body 2 is provided above the furnace base 1, a smoke pipe 3 is provided on the upper part of the furnace body 2, and the end of the smoke pipe 3 is connected to an exhaust gas treatment mechanism, which includes a dust removal component, an air preheating component and an acid gas adsorption component.

[0023] like Figure 2 As shown, the dust removal assembly includes a dust removal box 4, a filter screen 5 is installed inside the dust removal box 4, the filter screen 5 is an arc-shaped structure, a collecting hopper 6 is provided at the bottom of the dust removal box 4, a sealing cover is provided at the bottom of the collecting hopper 6, a cleaning assembly is provided on one side of the filter screen 5, the air inlet end of the dust removal box 4 is connected to the smoke pipe 3, and the air outlet end is connected to the air preheating assembly through a conduit 10; the cleaning assembly includes a rotating shaft 7 rotatably installed on the inner wall of the dust removal box 4, a plurality of cleaning brushes 8 are installed on the rotating shaft 7, and a hand wheel 9 is installed after one end thereof passes through the side wall of the dust removal box 4.

[0024] The flue gas discharged from the furnace body 2 enters the dust removal box 4 through the smoke pipe 3, and the dust particles in the flue gas are filtered through the filter 5. The filtered flue gas is transported to the air preheating component through the conduit 10.

[0025] The rotating shaft 7 is rotated by the hand wheel 9, and the rotating shaft 7 drives the cleaning brush 8 to rotate, thereby cleaning the filter 5. The cleaned dust falls into the collecting hopper 6. When the machine is stopped, the sealing cover at the bottom of the collecting hopper 6 is opened to discharge the dust.

[0026] like Figure 3 As shown, the air preheating assembly includes a heat exchange box 11, in which a heat exchange box 12 is installed. Ventilation pipes 13 are fixedly connected to the front and rear ends, and the ventilation pipe 13 at the rear end is connected to the furnace body 2 through a second conduit 14. The first conduit 10 is connected to the front upper part of the heat exchange box 12, and the rear lower part of the heat exchange box 12 is connected to the acid gas adsorption assembly through a third conduit 16. A plurality of heat conducting plates 15 are fixedly connected to the four sides of the heat exchange box 12.

[0027] The ventilation pipe 13 at the front end of the heat exchange box 11 is connected to a blower, which delivers the oxygen required for calcination into the furnace body 2. The flue gas enters the heat exchange box 12 through conduit 10 and is transported to the acid gas adsorption assembly through conduit 3 16. The heat carried by the flue gas is transferred to the heat exchange box 12 and heat conducting plate 15, which preheat the air entering the furnace body 2. This preheating of the air improves combustion efficiency and reduces fuel consumption.

[0028] like Figure 4 As shown, the acid gas adsorption assembly includes a treatment box 17 connected to the conduit three 16, and two sponge plates 18 are installed inside the treatment box 17 through two positioning frames. The positioning frame is an inverted U-shaped structure. A medicine box 19 is provided above the treatment box 17, and a drainage pipe 24 is provided at the lower side. The lower side of the medicine box 19 is connected to two branch pipes 21 through a liquid guide pipe 20. The branch pipe 21 is located above the sponge plate 18, and a plurality of drippers 22 extending into the interior of the treatment box 17 are fixed to the bottom thereof. An exhaust pipe 23 is fixed to the end of the treatment box 17 away from the conduit three 16, and valves are installed on the liquid guide pipe 20 and the drainage pipe 24.

[0029] An alkaline liquid, such as sodium hydroxide solution, is added to the reagent phase 19, an induced draft fan is installed on the exhaust pipe 23, the valve on the liquid guide pipe 20 is opened to allow the sodium hydroxide solution to enter the treatment box 17, and the bottom of the sponge board 18 is immersed in the sodium hydroxide solution, then the valve on the drain pipe 24 is opened, and the valve on the liquid guide pipe 20 is adjusted so that the dripper 22 slowly drips the sodium hydroxide solution to keep the sponge board 18 moist, and the liquid level in the treatment box 17 is in a balanced state, the flue gas after heat exchange enters the treatment box 17 through the conduit three 16, and is then discharged through the exhaust pipe 23. When the flue gas passes through the sponge board 18, the acidic gas in the flue gas is adsorbed, thereby achieving purification of the flue gas.

[0030] In specific use, the flue gas discharged from the furnace body 2 enters the dust removal box 4 through the smoke pipe 3, is filtered by the filter screen 5, and is transported to the heat exchange box 12 through the conduit 10, and then enters the inside of the treatment box 17 through the conduit 3 16, and is finally discharged through the exhaust pipe 23. The heat exchange box 12 and the heat conducting plate 15 preheat the air entering the furnace body 2, and the sodium hydroxide solution in the reagent box 19 drips onto the sponge plate 18 through the dripper. When the flue gas passes through the sponge plate 18, the acidic gases (sulfur dioxide, nitrogen oxides, etc.) in the flue gas are adsorbed to achieve purification of the flue gas.

[0031] The undisclosed parts in the present invention are all prior art, and their specific structures and working principles are not described in detail here.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0034] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above, and does not deviate from the purpose of the present invention, without inventive design, a structure and embodiment similar to the technical solution should fall within the scope of protection of the present invention.

Claims

1. An environmentally friendly and energy-saving lime kiln, comprising a furnace base (1), a furnace body (2) disposed above the furnace base (1), a smoke pipe (3) disposed on the upper portion of the furnace body (2), and characterized in that: The end of the smoke pipe (3) is connected to an exhaust gas treatment mechanism, which includes a dust removal component, an air preheating component and an acid gas adsorption component; The dust removal assembly includes a dust removal box (4), a filter screen (5) is installed inside the dust removal box (4), a cleaning assembly is provided on one side of the filter screen (5), an air inlet end of the dust removal box (4) is connected to the smoke pipe (3), and an air outlet end is connected to the air preheating assembly through a conduit (10); The air preheating assembly comprises a heat exchange box (11), a heat exchange box (12) is installed inside the heat exchange box (11), ventilation pipes (13) are fixedly connected to the front and rear ends, and the ventilation pipe (13) at the rear end is connected to the furnace body (2) through a second conduit (14), the first conduit (10) is connected to the front upper part of the heat exchange box (12), and the rear lower part of the heat exchange box (12) is connected to the acid gas adsorption assembly through a third conduit (16); The acid gas adsorption assembly includes a treatment box (17) connected to the conduit three (16), two sponge plates (18) are installed inside the treatment box (17) through two positioning frames, a medicine box (19) is provided above the treatment box (17), and two branch pipes (21) are connected to the lower part of the side of the medicine box (19) through a liquid guide pipe (20), the branch pipes (21) are located above the sponge plate (18), and a plurality of drippers (22) extending into the interior of the treatment box (17) are fixedly connected to the bottom of the branch pipes (21), and an exhaust pipe (23) is fixedly connected to one end of the treatment box (17) away from the conduit three (16).

2. The environmentally friendly and energy-saving lime kiln according to claim 1, characterized in that: The filter screen (5) is an arc-shaped structure, a collecting hopper (6) is provided at the bottom of the dust removal box (4), and a sealing cover is provided at the bottom of the collecting hopper (6).

3. The environmentally friendly and energy-saving lime kiln according to claim 1, characterized in that: The cleaning assembly comprises a rotating shaft (7) rotatably mounted on the inner wall of the dust removal box (4); a plurality of cleaning brushes (8) are mounted on the rotating shaft (7); and a hand wheel (9) is mounted on one end of the rotating shaft after passing through the side wall of the dust removal box (4).

4. The environmentally friendly and energy-saving lime kiln according to claim 1, characterized in that: A plurality of heat conducting sheets (15) are fixedly connected around the heat exchange box (12).

5. The environmentally friendly and energy-saving lime kiln according to claim 1, characterized in that: The positioning frame is an inverted U-shaped structure, and a drainage pipe (24) is provided at the lower part of the side of the processing box (17).

6. The environmentally friendly and energy-saving lime kiln according to claim 5, characterized in that: Valves are installed on both the liquid guiding tube (20) and the liquid discharging tube (24).

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