Combustion emission equipment capable of removing dust

Abstract

The utility model relates to the field of combustion chambers, in particular to a combustion emission device capable of removing dust, which comprises a first combustion box, the upper end of the first combustion box is fixedly connected with a first spraying box, the upper end of the first spraying box is fixedly connected with a second spraying box, and the upper end of the second spraying box is fixedly connected with a gas collecting hood. Acid liquor or alkali liquor is injected into the liquid inlet pipe through the liquid inlet pipe, enters the second tank body through the cavity and the first tank body and then flows into the rotating pipe, then the acid liquor or the alkali liquor is sprayed outwards through the second spray head, and meanwhile, the motor is started to enable the rotating column to rotate, so that the acid liquor or the alkali liquor flows into the second tank body through the rotating pipe. The worm wheel can drive a worm barrel to rotate, the worm barrel drives a rotating pipe to rotate, a second spray head can rotate to spray mist, sprayed atomized acid liquor and alkali liquor can react with waste gas, then a first combustion box and a second combustion box are started to combust the reacted waste gas, and the waste gas treatment effect can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of combustion chambers, and in particular relates to a combustion emission device capable of removing dust. Background Art

[0002] With the acceleration of industrialization and the enhancement of environmental protection awareness, dust removal and combustion equipment plays an increasingly important role in industrial production. Traditional combustion equipment often produces a large amount of smoke and particulate matter during the combustion process. If these pollutants are not effectively treated and directly discharged into the atmosphere, they will cause serious pollution to the environment and affect human health.

[0003] Combustion emission equipment is a comprehensive equipment specially designed to treat and discharge waste gas, waste heat and waste residue generated during the combustion process. However, the combustion emission equipment in the prior art is not convenient for acid or alkali washing of waste gas during use, and it is difficult to quickly remove, collect and treat the dust generated by combustion, which needs further improvement.

[0004] Therefore, a combustion emission equipment with dust removal function is proposed, which is convenient for acid or alkali washing of exhaust gas and can quickly remove, collect and process the dust generated by combustion. Utility Model Content

[0005] In order to overcome the problems that the combustion emission equipment in the prior art is inconvenient to perform acid or alkali washing on the exhaust gas during use, and it is difficult to quickly remove, collect and treat the dust generated by the combustion, therefore, a combustion emission equipment with dust removal is proposed.

[0006] The technical scheme of the utility model is as follows: a combustion emission device capable of removing dust comprises a first combustion box, a first spray box is fixedly connected to the upper end of the first combustion box, a second spray box is fixedly connected to the upper end of the first spray box, a gas collecting hood is fixedly connected to the upper end of the second spray box, a second combustion box is fixedly connected to the upper end of the gas collecting hood, a first combustion assembly is arranged on the first combustion box, a first spray assembly is arranged on the first spray box, a second spray assembly is arranged on the second spray box, a second combustion assembly is arranged on the second combustion box, a liquid inlet mechanism is arranged on the gas collecting hood, a rotating plate is fixedly connected to the lower right end of the first combustion box, a rotating plate is rotatably mounted on the upper right end of the U-shaped block, the second spray assembly comprises a rotating tube, a worm barrel, a second nozzle, a motor and a rotating column, and the front and rear ends of the inner wall of the second spray box are rotatably mounted There is a rotating tube, a worm barrel is fixedly connected to the outer wall of the rotating tube, a plurality of second nozzles are fixedly connected to the outer wall of the rotating tube, a motor is fixedly connected to the left end of the second spray box, rotating columns are rotatably installed on the left and right ends of the inner wall of the second spray box, a worm wheel is fixedly connected to the outer wall of the rotating column, the worm wheel and the worm barrel are meshed with each other, the output shaft of the motor passes through the left end of the second spray box and is fixedly connected to the left end of the rotating column, the liquid inlet mechanism includes a liquid inlet pipe, a bracket, a liquid inlet, a cavity, a first trough body and a second trough body, the right end of the gas collecting hood is fixedly connected with a liquid inlet pipe in a through-type manner, the lower end of the liquid inlet pipe is fixedly connected with a liquid inlet, a cavity is opened inside the liquid inlet, the inner wall of the cavity is penetrated with a first trough body, the side wall of the rotating tube is penetrated with a second trough body, the second trough body and the first trough body are interconnected, and the inner wall of the liquid inlet fits with the side wall of the rotating tube.

[0007] During use, acid or alkali solution is injected into the liquid inlet through the liquid inlet pipe, the acid or alkali solution will enter the interior of the second trough body through the cavity and the first trough body, and then flow into the interior of the rotating tube, and then the acid or alkali solution will be sprayed outward through the second nozzle, and at the same time, the motor is turned on to rotate the rotating column, the worm gear will drive the worm barrel to rotate, and the worm barrel drives the rotating tube to rotate, so that the second nozzle can rotate and spray, and the sprayed atomized acid and alkali solution will react with the exhaust gas, and then the first combustion box and the second combustion box are turned on to burn the reacted exhaust gas, which can improve the treatment effect of the exhaust gas, and the generated dust will fall into the interior of the U-shaped block through the first combustion box, which is convenient for collecting the dust, solving the problem that the combustion emission equipment in the prior art is not convenient for acid or alkali washing of the exhaust gas during use, and it is difficult to quickly remove, collect and treat the dust generated by combustion.

[0008] The first combustion assembly includes a first air intake pipe, a connecting pipe, a first fixed plate, a first flame head, a first inclined plate and a first through hole. The right end of the first combustion box is fixedly connected to the first air intake pipe, the left end of the first air intake pipe passes through the right end of the first combustion box and is fixedly connected to the connecting pipe, the left end of the connecting pipe is fixedly connected to the first fixed plate, the left end of the first fixed plate is fixedly connected to a plurality of first flame heads, the front and rear ends of the inner wall of the first combustion box are fixedly connected to an inclined first inclined plate, the upper and lower ends of the first inclined plate are penetrated by evenly distributed first through holes, and the lower part of the right end of the first air intake pipe is penetrated by an ash outlet groove.

[0009] The first spray assembly includes a support, a first nozzle, a first tube body and a second tube body. Evenly distributed supports are fixedly connected to the left and right edges of the upper end of the first spray box. Two first nozzles are fixedly connected to the support in a through-type manner. The output shafts of the first nozzles are directed toward the center of the first spray box. The first tube body is commonly installed on the water inlet ends of multiple first nozzles on the same side. One end of the first tube body penetrates the wall layer of the second spray box and extends to the outside of the second spray box. The ends of the two first tube bodies located outside the second spray box are commonly fixedly connected to the second tube body.

[0010] A bracket is fixedly connected to the right end of the inner wall of the second spray box, and the bracket is fixedly connected to the side wall of the liquid inlet pipe.

[0011] The rotating column is located above the rotating tube, and the top surfaces of the rotating column and the rotating tube are in a cross shape.

[0012] The rotating column and the rotating tube are made of corrosion-resistant materials, and the worm wheel and the worm barrel are made of stainless steel.

[0013] The second combustion assembly includes a second air intake pipe, a second fixed plate, a second flame head, a second inclined plate and a second through hole. The right end of the second combustion box is fixedly connected to the second air intake pipe, the left end of the second air intake pipe passes through the right end of the second combustion box and is fixedly connected to the second fixed plate, the left end of the second fixed plate is fixedly connected to a uniformly distributed second flame head, the front and rear ends of the inner wall of the second combustion box are fixedly connected to an inclined second inclined plate, and the upper and lower ends of the second inclined plate are penetrated by uniformly distributed second through holes.

[0014] The second inclined plate is located above the second fixed plate, and the second inclined plate is made of high temperature resistant material.

[0015] The beneficial effects of the utility model are as follows: by injecting acid or alkali solution into the liquid inlet through the liquid inlet pipe, the acid or alkali solution will enter the interior of the second trough body through the cavity and the first trough body, and then flow into the interior of the rotating tube, and then the acid or alkali solution will be sprayed outward through the second nozzle, and at the same time, the motor is turned on to rotate the rotating column, the worm gear will drive the worm barrel to rotate, and the worm barrel drives the rotating tube to rotate, so that the second nozzle can rotate and spray, and the sprayed atomized acid and alkali solution will react with the exhaust gas, and then the first combustion box and the second combustion box are turned on to burn the exhaust gas after the reaction, which can improve the treatment effect of the exhaust gas, and the produced dust will fall into the interior of the U-shaped block through the first combustion box, which is convenient for collecting the dust, solving the problem that the combustion emission equipment in the prior art is inconvenient for acid or alkali washing of the exhaust gas during use, and it is difficult to quickly remove, collect and treat the dust produced by combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of a combustion emission device capable of removing dust according to the utility model;

[0017] Figure 2 It is a three-dimensional structural schematic diagram of a first combustion box of a combustion and emission device capable of dust removal according to the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of a second combustion box of a combustion and emission device capable of dust removal according to the utility model;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of a first spray box of a combustion emission device capable of removing dust according to the utility model;

[0020] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of a second spray box of a combustion emission device capable of removing dust according to the utility model;

[0021] Figure 6 It is a cross-sectional three-dimensional structural schematic diagram of a liquid inlet mechanism of a combustion emission device capable of removing dust according to the utility model;

[0022] Figure 7 for Figure 6 Schematic diagram of the three-dimensional structure with a partial enlargement at point A in the middle.

[0023] The symbols in the attached drawings are: 1, first combustion box; 101, first air inlet pipe; 102, connecting pipe; 103, first fixing plate; 104, first flame head; 105, first inclined plate; 106, first through hole; 107, ash outlet groove; 2, first spray box; 201, support; 202, first spray head; 203, first pipe body; 204, second pipe body; 3, second spray box; 301, rotating pipe; 302, worm tube; 303, second spray head; 304, motor; 305, rotating column; 306, worm gear; 4, gas collecting hood; 5, second combustion box; 501, second air inlet pipe; 502, second fixing plate; 503, second flame head; 504, second inclined plate; 505, second through hole; 6, U-shaped block; 7, rotating plate; 8, liquid inlet mechanism; 801, liquid inlet pipe; 802, bracket; 803, liquid inlet; 804, cavity; 805, first tank body; 806, second tank body. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0025] like Figure 1-Figure 7As shown, the utility model provides an embodiment: a dust-removable combustion emission device, comprising a first combustion box 1, a first spray box 2 is fixedly connected to the upper end of the first combustion box 1, a second spray box 3 is fixedly connected to the upper end of the first spray box 2, a gas collecting hood 4 is fixedly connected to the upper end of the second spray box 3, a second combustion box 5 is fixedly connected to the upper end of the gas collecting hood 4, a first combustion assembly is provided on the first combustion box 1, a first spray assembly is provided on the first spray box 2, and a second spray assembly is provided on the second spray box 3 The second combustion box 5 is provided with a second combustion assembly, the gas collecting cover 4 is provided with a liquid inlet mechanism 8, the lower right end of the first combustion box 1 is fixedly connected with a rotating plate 7, the upper right end of the U-shaped block 6 is rotatably mounted with the rotating plate 7, the second spray assembly includes a rotating tube 301, a worm barrel 302, a second nozzle 303, a motor 304 and a rotating column 305, the front and rear ends of the inner wall of the second spray box 3 are rotatably mounted with a rotating tube 301, the outer wall of the rotating tube 301 is fixedly connected with a worm barrel 302, and the rotating tube 3 The outer wall of the second spray box 3 is fixedly connected with a plurality of second spray heads 303, the left end of the second spray box 3 is fixedly connected with a motor 304, the left and right ends of the inner wall of the second spray box 3 are rotatably mounted with rotating columns 305, the outer wall of the rotating column 305 is fixedly connected with a worm gear 306, the worm gear 306 and the worm barrel 302 are meshed with each other, the output shaft of the motor 304 passes through the left end of the second spray box 3 and is fixedly connected to the left end of the rotating column 305, the liquid inlet mechanism 8 includes a liquid inlet pipe 801, a bracket 802, a liquid inlet 803, a cavity 804, a first trough body 805 and a second trough body 806, the right end of the gas collecting hood 4 is fixedly connected with a liquid inlet pipe 801, the lower end of the liquid inlet pipe 801 is fixedly connected with a liquid inlet 803, a cavity 804 is opened inside the liquid inlet 803, the inner wall of the cavity 804 is penetrated with the first trough body 805, the side wall of the rotating tube 301 is penetrated with the second trough body 806, the second trough body 806 and the first trough body 805 are communicated with each other, and the inner wall of the liquid inlet 803 is in contact with the side wall of the rotating tube 301.

[0026] When in use, the acid or alkali solution is injected into the liquid inlet 803 through the liquid inlet pipe 801, and the acid or alkali solution will enter the second tank body 806 through the cavity 804 and the first tank body 805, and then flow into the interior of the rotating tube 301, and then the acid or alkali solution will be sprayed outward through the second nozzle 303, and at the same time, the motor 304 is turned on to rotate the rotating column 305, and the worm gear 306 will drive the worm barrel 302 to rotate, and the worm barrel 302 drives the rotating tube 301 to rotate, so that the second nozzle 303 can be rotated and sprayed, and the sprayed atomized acid and alkali solution will react with the exhaust gas, and then the first combustion box 1 and the second combustion box 5 are turned on to burn the exhaust gas after the reaction, which can improve the treatment effect of the exhaust gas, and the produced dust will fall into the inside of the U-shaped block 6 through the first combustion box 1, which is convenient for collecting the dust.

[0027] like Figure 1 and Figure 2As shown, in this embodiment, the first combustion assembly includes a first air intake pipe 101, a connecting pipe 102, a first fixing plate 103, a first flame head 104, a first inclined plate 105 and a first through hole 106. The right end of the first combustion box 1 is fixedly connected to the first air intake pipe 101, the left end of the first air intake pipe 101 passes through the right end of the first combustion box 1 and is fixedly connected to the connecting pipe 102, the left end of the connecting pipe 102 is fixedly connected to the first fixing plate 103, and the left end of the first fixing plate 103 is fixedly connected to a plurality of first flame heads 104. The front and rear ends of the inner wall of the first combustion box 1 are fixedly connected with an inclined first inclined plate 105, and the upper and lower ends of the first inclined plate 105 are penetrated with evenly distributed first through holes 106. The lower right end of the first air inlet pipe 101 is penetrated with an ash outlet groove 107. The exhaust gas will move upward through the first through hole 106, and the large particles of dust generated after acid washing or alkali washing will fall on the upper end of the first inclined plate 105, and then fall into the interior of the U-shaped block 6 through the ash outlet groove 107, so as to facilitate the collection of the generated large particles of dust.

[0028] like Figure 1 and Figure 4 As shown, in this embodiment, the first spray assembly includes a support 201, a first nozzle 202, a first tube body 203 and a second tube body 204. The left and right edges of the upper end of the first spray box 2 are fixedly connected with evenly distributed supports 201. Two first nozzles 202 are fixedly connected to the support 201 in a through-type manner. The output shaft of the first nozzle 202 faces the center of the first spray box 2. The first tube body 203 is commonly installed on the water inlet ends of multiple first nozzles 202 on the same side. One end of the first tube body 203 penetrates the wall layer of the second spray box 3 and extends to the outside of the second spray box 3. The ends of the two first tube bodies 203 located outside the second spray box 3 are commonly fixedly connected with the second tube body 204. Acid or alkali solution is injected into the interior of the first tube body 203 through the second tube body 204, and the acid and alkali solution will be sprayed into the interior of the first spray box 2 through the first nozzle 202, so that the exhaust gas transported upward can be acid-washed or alkali-washed.

[0029] like Figure 1 and Figure 6 As shown, in this embodiment, a bracket 802 is fixedly connected to the right end of the inner wall of the second spray box 3, and the bracket 802 is fixedly connected to the side wall of the liquid inlet pipe 801. By providing the bracket 802, the stability of the liquid inlet pipe 801 can be improved.

[0030] like Figure 1 and Figure 5 As shown, in this embodiment, the rotating column 305 is located above the rotating tube 301, and the top surfaces of the rotating column 305 and the rotating tube 301 are cross-shaped. By setting the rotating column 305 and the rotating tube 301, it is convenient to maintain the rotating tube 301 or the rotating column 305 separately.

[0031] like Figure 1 and Figure 5 As shown, in this embodiment, the rotating column 305 and the rotating tube 301 are both made of corrosion-resistant materials, and the worm wheel 306 and the worm barrel 302 are both made of stainless steel, which can improve the service life of the rotating tube 301, the worm barrel 302, the rotating column 305 and the worm wheel 306 in an acid mist and alkaline mist environment.

[0032] like Figure 1 and Figure 3 As shown, in this embodiment, the second combustion assembly includes a second air intake pipe 501, a second fixed plate 502, a second flame head 503, a second inclined plate 504 and a second through hole 505. The right end of the second combustion box 5 is fixedly connected to the second air intake pipe 501, the left end of the second air intake pipe 501 passes through the right end of the second combustion box 5 and is fixedly connected to the second fixed plate 502, the left end of the second fixed plate 502 is fixedly connected to the evenly distributed second flame heads 503, the front and rear ends of the inner wall of the second combustion box 5 are fixedly connected to the inclined second inclined plates 504, the upper and lower ends of the second inclined plates 504 are penetrated by evenly distributed second through holes 505, and the upward-flowing flying air will be burned by the second flame head 503, so that the harmful substances therein can be removed.

[0033] like Figure 1 and Figure 3 As shown, in this embodiment, the second inclined plate 504 is located above the second fixed plate 502. The second inclined plate 504 is made of high temperature resistant material. The second inclined plate 504 can block dust. Most of the dust will slide down along the first inclined plate 105 in the device, making it convenient to collect the dust.

[0034] Working principle: First, inject acid or alkali into the liquid inlet 803 through the liquid inlet pipe 801, the acid or alkali will enter the second tank 806 through the cavity 804 and the first tank 805, and then flow into the rotating tube 301, and then the acid or alkali will be sprayed out through the second nozzle 303, and then the acid or alkali will be injected into the first tube 203 through the second tube 204, and the acid and alkali will be sprayed into the first spray box 2 through the first nozzle 202, so that the waste gas transported upward can be acid-washed or alkaline-washed, and at the same time, the motor 304 is turned on to rotate the rotating column 305, and the worm gear 30 6 will drive the worm barrel 302 to rotate, and the worm barrel 302 drives the rotating tube 301 to rotate, so that the second nozzle 303 can rotate and spray, and the sprayed atomized acid and alkali solution will react with the exhaust gas, and then the first combustion box 1 and the second combustion box 5 are opened, and the first flame head 104 and the second flame head 503 are used to burn the exhaust gas after the reaction, which can improve the treatment effect of the exhaust gas, and the exhaust gas will move upward through the first through hole 106, and the large particles of dust generated after acid washing or alkali washing will fall on the upper end of the first inclined plate 105, and then fall into the interior of the U-shaped block 6 through the ash outlet 107, so as to facilitate the collection of the generated large particles of dust.

Claims

1. A dust-removable combustion and emission device, comprising a first combustion box (1), characterized in that: The upper end of the first combustion box (1) is fixedly connected to the first spray box (2), the upper end of the first spray box (2) is fixedly connected to the second spray box (3), the upper end of the second spray box (3) is fixedly connected to the gas collecting hood (4), the upper end of the gas collecting hood (4) is fixedly connected to the second combustion box (5), the first combustion box (1) is provided with a first combustion assembly, the first spray box (2) is provided with a first spray assembly, the second spray box (3) is provided with a second spray assembly, the second combustion box (5) is provided with a second combustion assembly, the gas collecting hood (4) is provided with a liquid inlet mechanism (8), the first A rotating plate (7) is fixedly connected to the lower right end of a combustion box (1); the rotating plate (7) is rotatably mounted on the upper right end of the U-shaped block (6); the second spray assembly comprises a rotating tube (301), a worm tube (302), a second spray head (303), a motor (304) and a rotating column (305); the rotating tube (301) is rotatably mounted on the front and rear ends of the inner wall of the second spray box (3); the outer wall of the rotating tube (301) is fixedly connected to the worm tube (302); the outer wall of the rotating tube (301) is fixedly connected to a plurality of second spray heads (303); and the second spray The left end of the second spray box (3) is fixedly connected to a motor (304), the left and right ends of the inner wall of the second spray box (3) are rotatably mounted with rotating columns (305), the outer wall of the rotating column (305) is fixedly connected to a worm gear (306), the worm gear (306) and the worm cylinder (302) are meshed with each other, the output shaft of the motor (304) passes through the left end of the second spray box (3) and is fixedly connected to the left end of the rotating column (305), the liquid inlet mechanism (8) comprises a liquid inlet pipe (801), a bracket (802), a liquid inlet (803), a cavity (804), a first tank body (80 5) and a second trough body (806), a liquid inlet pipe (801) is fixedly connected to the right end of the gas collecting hood (4), a liquid inlet (803) is fixedly connected to the lower end of the liquid inlet pipe (801), a cavity (804) is provided inside the liquid inlet (803), a first trough body (805) is provided through the inner wall of the cavity (804), a second trough body (806) is provided through the side wall of the rotating tube (301), the second trough body (806) and the first trough body (805) are interconnected, and the inner wall of the liquid inlet (803) is in contact with the side wall of the rotating tube (301).

2. A dust-removable combustion and emission equipment according to claim 1, characterized in that: The first combustion assembly comprises a first air intake pipe (101), a connecting pipe (102), a first fixing plate (103), a first flame spray head (104), a first inclined plate (105) and a first through hole (106); the first air intake pipe (101) is fixedly connected to the right end of the first combustion box (1); the left end of the first air intake pipe (101) passes through the right end of the first combustion box (1) and is fixedly connected to the connecting pipe (102); the left end of the connecting pipe (102) is fixedly connected to the first fixing plate (103); the left end of the first fixing plate (103) is fixedly connected to a plurality of first flame spray heads (104); the front and rear ends of the inner wall of the first combustion box (1) are fixedly connected to the first inclined plate (105) which is arranged obliquely; the upper and lower ends of the first inclined plate (105) are penetrated by first through holes (106) which are evenly distributed; and the lower part of the right end of the first air intake pipe (101) is penetrated by an ash outlet groove (107).

3. A dust-removable combustion and emission equipment according to claim 1, characterized in that: The first spray assembly comprises a support (201), a first spray head (202), a first tube body (203) and a second tube body (204); the support (201) is evenly distributed and fixedly connected to the left and right edges of the upper end of the first spray box (2); two first spray heads (202) are fixedly connected to the support (201) in a through-type manner; the output shaft of the first spray head (202) faces the center of the first spray box (2); the first tube body (203) is commonly installed on the water inlet ends of the plurality of first spray heads (202) on the same side; one end of the first tube body (203) passes through the wall layer of the second spray box (3) and extends to the outside of the second spray box (3); and one end of the two first tube bodies (203) located outside the second spray box (3) is commonly fixedly connected to the second tube body (204).

4. A dust-removable combustion and emission equipment according to claim 1, characterized in that: A bracket (802) is fixedly connected to the right end of the inner wall of the second spray box (3), and the bracket (802) is fixedly connected to the side wall of the liquid inlet pipe (801).

5. A dust-removable combustion and emission equipment according to claim 1, characterized in that: The rotating column (305) is located above the rotating tube (301), and the top surfaces of the rotating column (305) and the rotating tube (301) are in a cross shape.

6. A dust-removable combustion and emission equipment according to claim 1, characterized in that: The rotating column (305) and the rotating tube (301) are both made of corrosion-resistant materials, and the worm wheel (306) and the worm barrel (302) are both made of stainless steel.

7. A dust-removable combustion and emission equipment according to claim 1, characterized in that: The second combustion assembly comprises a second air intake pipe (501), a second fixing plate (502), a second flame spray head (503), a second inclined plate (504) and a second through hole (505); the right end of the second combustion box (5) is fixedly connected to the second air intake pipe (501); the left end of the second air intake pipe (501) passes through the right end of the second combustion box (5) and is fixedly connected to the second fixing plate (502); the left end of the second fixing plate (502) is fixedly connected to evenly distributed second flame spray heads (503); the front and rear ends of the inner wall of the second combustion box (5) are fixedly connected to an inclined second inclined plate (504); and the upper and lower ends of the second inclined plate (504) are penetrated by evenly distributed second through holes (505).

8. A dust-removable combustion and emission equipment according to claim 7, characterized in that: The second inclined plate (504) is located above the second fixed plate (502), and the second inclined plate (504) is made of high temperature resistant material.

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