Energy-saving ceramic kiln with waste heat recovery function

Abstract

The utility model relates to the technical field of kiln waste heat recovery, and discloses an energy-saving ceramic kiln with a waste heat recovery function, which comprises a heat recovery box and a flue gas waste heat recovery and purification device for purifying waste gas and recovering waste heat in the waste gas, and an exhaust pipeline is mounted on the right side surface of the heat recovery box. According to the energy-saving ceramic kiln with the waste heat recovery function, waste heat in exhausted waste gas is recycled through the flue gas waste heat recovery and purification device, so that compared with a mode of directly exhausting the waste gas, the waste of resources is reduced, when the flue gas waste heat recovery and purification device works, the waste gas can be in direct contact with water, and the waste heat recovery effect is improved. Therefore, the recovery efficiency of waste heat in waste gas by water is improved, dust in the flue gas can be absorbed by the water after the flue gas is in direct contact with the water, and then the dust is precipitated in the water or filtered out by the filter screen plate, so that the dust content in the discharged flue gas is reduced, and the air pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of kiln waste heat recovery, in particular to an energy-saving ceramic kiln with a waste heat recovery function. Background Art

[0002] A kiln is a furnace used to fire ceramics and sculptures or to fuse enamel to the surface of metal objects. During the process of firing ceramics, a large amount of heat will be lost with the exhaust gas, resulting in a large amount of heat waste. In addition, when exhausting the smoke, the dust in the smoke is directly discharged, which will also pollute the air and is not conducive to environmental protection. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the deficiencies in the prior art, the utility model provides an energy-saving ceramic kiln with a waste heat recovery function, which solves the problem of smoke and dust in the exhaust gas polluting the air and the waste heat in the exhaust gas being directly discharged and wasting resources.

[0005] (2) Technical solution

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an energy-saving ceramic kiln with a waste heat recovery function, comprising a heat recovery box and a flue gas waste heat recovery and purification device for purifying exhaust gas and recovering waste heat in the exhaust gas, an exhaust pipe is installed on the side of the heat recovery box, an air intake pipe is installed on the left side of the heat recovery box, a drainage pipe is installed on the left side of the heat recovery box near the bottom, a sewage pipe is installed on the right side wall of the heat recovery box near the bottom, a filter screen is installed on the left side of the bottom inner wall of the heat recovery box, a sedimentation baffle is installed on the bottom inner wall of the heat recovery box and on the right side of the filter screen, and a flue gas waste heat recovery and purification device for purifying exhaust gas and recovering waste heat in the exhaust gas is provided inside the heat recovery box.

[0007] Preferably, the flue gas waste heat recovery and purification device includes a cold water pipe, a first transverse pipe, a side drainage opening, a second transverse pipe, a middle drainage opening, a side baffle and a middle baffle. The cold water pipe is installed with the rear side wall of the heat recovery box, the first transverse pipe is installed with the rear inner wall of the heat recovery box, the rear end of the first transverse pipe passes through the heat recovery box and is connected to the cold water pipe, the bottom of the first transverse pipe is provided with a side drainage opening at a position close to the inner wall of the heat recovery box, the side baffle is installed with the bottom inner wall of the heat recovery box and is located below the side drainage opening, the second transverse pipe is installed with the rear inner wall of the heat recovery box, the rear end of the second transverse pipe passes through the heat recovery box and is connected to the cold water pipe, the middle drainage opening is provided at the middle of the bottom of the second transverse pipe, and the middle baffle is installed with the bottom inner wall of the heat recovery box and is located below the middle drainage opening.

[0008] Preferably, the height of the sedimentation partition is lower than the height of the filter screen plate.

[0009] Preferably, a control valve is installed inside the sewage pipe.

[0010] Preferably, the side drainage openings and the middle drainage openings are staggered, and the side baffles and the middle baffles are staggered.

[0011] Preferably, the side baffles and the middle baffle are installed at an angle.

[0012] Compared with the existing technology, the utility model provides an energy-saving ceramic kiln with waste heat recovery function, which has the following beneficial effects:

[0013] 1. This energy-saving ceramic kiln with waste heat recovery function recycles the waste heat in the exhaust gas through the flue gas waste heat recovery and purification device, thereby reducing the waste of resources compared to the method of directly discharging the exhaust gas.

[0014] 2. When the flue gas waste heat recovery and purification device of the energy-saving ceramic kiln with waste heat recovery function is working, the exhaust gas will come into direct contact with water, thereby improving the efficiency of using water to recover the waste heat in the exhaust gas. Moreover, after the flue gas comes into direct contact with water, the dust in the flue gas will be absorbed by the water, and then precipitated in the water or filtered out by the filter plate, thereby reducing the dust content in the exhaust gas and reducing air pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the bottom inner wall structure of the heat recovery box of the utility model;

[0017] Figure 3 This is a schematic diagram of the top inner wall structure of the heat recovery box of the present invention.

[0018] Among them: 1. Heat recovery box; 2. Exhaust duct; 3. Intake duct; 4. Drainage duct; 5. Sewage duct; 6. Sedimentation baffle; 7. Filter plate; 8. Flue gas waste heat recovery and purification device; 81. Cold water pipe; 82. First horizontal pipe; 83. Side drainage opening; 84. Second horizontal pipe; 85. Middle drainage opening; 86. Side baffle; 87. Middle baffle. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-3 The utility model provides an energy-saving ceramic kiln with a waste heat recovery function, comprising a heat recovery box 1 and a flue gas waste heat recovery and purification device 8 for purifying exhaust gas and recovering waste heat in the exhaust gas. The outer surface of the heat recovery box 1 is provided with a heat insulation layer, an exhaust pipe 2 is installed on the side of the heat recovery box 1, an air intake pipe 3 is installed on the left side of the heat recovery box 1, a drainage pipe 4 is installed on the left side of the heat recovery box 1 near the bottom, a sewage pipe 5 is installed on the right side wall of the heat recovery box 1 near the bottom, a filter screen 7 is installed on the left side of the bottom inner wall of the heat recovery box 1, a sedimentation partition 6 is installed on the bottom inner wall of the heat recovery box 1 and on the right side of the filter screen 7, and a flue gas waste heat recovery and purification device 8 for purifying exhaust gas and recovering waste heat in the exhaust gas is provided inside the heat recovery box 1.

[0021] Furthermore, the flue gas waste heat recovery and purification device 8 includes a cold water pipe 81, a first transverse pipe 82, a side drainage opening 83, a second transverse pipe 84, a middle drainage opening 85, a side baffle 86 and a middle baffle 87. The cold water pipe 81 is installed on the rear side wall of the heat recovery box 1, the first transverse pipe 82 is installed on the rear inner wall of the heat recovery box 1, the rear end of the first transverse pipe 82 passes through the heat recovery box 1 and is connected to the cold water pipe 81, the bottom of the first transverse pipe 82 is located near the inner wall of the heat recovery box 1 and is provided with a side drainage opening 83, the side baffle 86 is connected to the bottom inner wall of the heat recovery box 1 The second transverse pipe 84 is installed on the rear inner wall of the heat recovery box 1, and the rear end of the second transverse pipe 84 passes through the heat recovery box 1 and is connected to the cold water pipe 81. The middle drain opening 85 is opened in the middle of the bottom of the second transverse pipe 84, and the middle baffle 87 is installed on the bottom inner wall of the heat recovery box 1 and is located below the middle drain opening 85. The flue gas waste heat recovery and purification device 8 brings the flue gas into direct contact with the water, and the water is heated by the waste heat in the flue gas to realize waste heat recovery. At the same time, the water absorbs the dust in the flue gas.

[0022] Furthermore, the height of the sedimentation partition 6 is lower than the height of the filter mesh plate 7. The sedimentation partition 6 blocks the water that has absorbed impurities, so that the impurities in the water are initially precipitated on the right side of the sedimentation partition 6. After the water passes through the sedimentation partition 6, it is filtered by the filter mesh plate 7 and discharged to the left after the two steps of sedimentation and filtration.

[0023] Furthermore, a control valve is installed inside the sewage pipe 5. During normal waste heat recovery and exhaust gas purification, the sewage pipe 5 remains closed. When cleaning is performed after use, the sewage pipe 5 is opened to discharge the stains inside the heat recovery box 1.

[0024] Furthermore, the side drainage opening 83 and the middle drainage opening 85 are staggered, and the side baffle 86 and the middle baffle 87 are staggered. The water curtain sprayed out through the side drainage opening 83 and the middle drainage opening 85 cooperates with the side baffle 86 and the middle baffle 87 to divide the interior of the heat recovery box 1 into a curved gas flow cavity. When the flue gas flows in a curved manner along the cavity, it comes into contact with water to recover and purify the waste heat.

[0025] Furthermore, the side baffles 86 and the middle baffle 87 are installed at an angle, so that water flows downward along the surfaces of the side baffles 86 and the middle baffle 87. The inclined flow can increase the contact area.

[0026] When in use, the flue gas is discharged into the interior of the heat recovery box 1 through the air inlet pipe 3, and water is input into the interior of the first transverse pipe 82 and the second transverse pipe 84 through the cold water pipe 81. The water in the first transverse pipe 82 is discharged downward through the side drainage opening 83 and sprinkles on the surface of the side baffle 86 and then flows downward along the surface of the side baffle 86. At the same time, the water in the second transverse pipe 84 is discharged downward through the middle drainage opening 85 and sprinkles on the surface of the middle baffle 87 and then flows downward along the surface of the middle baffle 87. The water flowing downward through the side drainage opening 83 and the middle drainage opening 85 forms a water curtain, which divides the interior of the heat recovery box 1 into a curved air flow channel, so that the flue gas flows in the separated channel. The exhaust gas is fully contacted with water through multiple turns, and the waste heat in the flue gas is absorbed by the water. At the same time, after the exhaust gas contacts the water, the water will absorb the dust particles in the exhaust gas. The water after absorbing the smoke is precipitated under the obstruction of the sedimentation partition 6 below the heat recovery box 1. The water above the bottom of the heat recovery box 1 passes over the sedimentation partition 6 and flows to the left side of the sedimentation partition 6 and then passes through the filter plate 7 for filtration. The filtered hot water is discharged through the drainage pipe 4. When cleaning after use, water is supplied at the same time through the drainage pipe 4 and the cold water pipe 81. The water flows in the opposite direction to the right inside the heat recovery box 1. The cleaned sewage can be discharged by opening the internal valve of the sewage pipe 5.

[0027] 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.

Claims

1. An energy-saving ceramic kiln with a waste heat recovery function, comprising a heat recovery box (1) and a flue gas waste heat recovery and purification device (8) for purifying waste gas and recovering waste heat in the waste gas, characterized in that: The heat recovery box (1) has an exhaust pipe (2) installed on its side, an air intake pipe (3) installed on the left side of the heat recovery box (1), a drainage pipe (4) installed on the left side of the heat recovery box (1) near the bottom, a sewage pipe (5) installed on the right side wall of the heat recovery box (1) near the bottom, a filter screen (7) installed on the left side of the bottom inner wall of the heat recovery box (1), a sedimentation baffle (6) installed on the bottom inner wall of the heat recovery box (1) and located on the right side of the filter screen (7), and a flue gas waste heat recovery and purification device (8) for purifying waste gas and recovering waste heat in the waste gas is provided inside the heat recovery box (1).

2. The energy-saving ceramic kiln with waste heat recovery function according to claim 1, characterized in that: The flue gas waste heat recovery and purification device (8) comprises a cold water pipe (81), a first transverse pipe (82), a side drainage opening (83), a second transverse pipe (84), a middle drainage opening (85), a side baffle (86) and a middle baffle (87); the cold water pipe (81) is installed on the rear side wall of the heat recovery box (1); the first transverse pipe (82) is installed on the rear inner wall of the heat recovery box (1); the rear end of the first transverse pipe (82) passes through the heat recovery box (1) and is connected to the cold water pipe (81); the bottom of the first transverse pipe (82) is located near the heat recovery box (1) A side drainage opening (83) is provided at the position of the inner side wall, the side baffle (86) is installed on the bottom inner wall of the heat recovery box (1) and is located below the side drainage opening (83), the second transverse pipe (84) is installed on the rear inner wall of the heat recovery box (1), the rear end of the second transverse pipe (84) passes through the heat recovery box (1) and is connected to the cold water pipe (81), the middle drainage opening (85) is opened at the middle position of the bottom of the second transverse pipe (84), and the middle baffle (87) is installed on the bottom inner wall of the heat recovery box (1) and is located below the middle drainage opening (85).

3. The energy-saving ceramic kiln with waste heat recovery function according to claim 1, characterized in that: The height of the sedimentation partition (6) is lower than the height of the filter screen plate (7).

4. The energy-saving ceramic kiln with waste heat recovery function according to claim 1, characterized in that: A control valve is installed inside the sewage pipe (5).

5. The energy-saving ceramic kiln with waste heat recovery function according to claim 2, characterized in that: The side drainage opening (83) and the middle drainage opening (85) are staggered, and the side baffle (86) and the middle baffle (87) are staggered.

6. The energy-saving ceramic kiln with waste heat recovery function according to claim 2, characterized in that: The side baffles (86) and the middle baffle (87) are installed in an inclined manner.

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