High-temperature reciprocating driving device with heating and condensation preventing functions

Abstract

A high-temperature reciprocating driving device with heating and condensation prevention functions comprises a crankshaft and a connecting rod which are arranged in a flue gas channel, the flue gas channel comprises an inner sealing box body and an outer heat preservation shell, the inner sealing box body is arranged in the outer heat preservation shell, the crankshaft and the connecting rod are arranged in the inner sealing box body, one end of the crankshaft is rotationally assembled with the connecting rod, and the other end of the crankshaft is rotationally assembled with the connecting rod. The other end of the crankshaft extends out of the inner sealing box body and the outer heat preservation shell in sequence and is connected with the output end of a speed reducer fixed outside the smoke channel through a coupler, and the outer wall of the crankshaft and the side wall of the inner sealing box body are assembled in a rotating mode and connected in a sealing mode through a sealing structure. A heater for heating the crankshaft is further installed between the inner sealing box body and the outer heat preservation shell. The flapping device is applied to a potassium chloride dry flue gas dust removal process, provides power for the flapping device of the bag type dust remover, and avoids the phenomena of filter bag hardening and chlorine-containing gas corrosion caused by condensation due to conventional low-temperature compressed air pulse back flushing.

Description

Technical Field

[0001] The utility model relates to a high-temperature reciprocating driving device with heating and anti-condensation functions. Background Art

[0002] The drying process in the production of potassium chloride is as follows: adopting natural gas heating mode, controlling the temperature by supplementing cold air and adjusting the temperature through a furnace cooling and temperature regulating fan. The flue gas enters the drying kiln, mixes with natural air in the drying kiln, and dries the materials. Finally, it is led to a bag filter from the tail air hood. After filtration, it is discharged to the atmosphere through an induced draft fan and a chimney. However, since the temperature of the tail gas generated by the drying kiln is about 150 °C and the relative humidity is > 90%, after filtering the flue gas with a bag filter, generally, the positive pressure reverse blowing of the clean tail gas and the mechanical vibration are combined to clean the filter bags. The mechanical vibration requires a reciprocating driving device to drive a beating device to vibrate the filter bags. Since the connecting rod and crankshaft of the reciprocating driving device are arranged in the flue gas passage, and chlorine remains in the filtered flue gas passing through the filter bags and the positive pressure reverse blowing air, the residual chlorine will condense on the crankshaft after contacting the crankshaft, resulting in corrosion of the crankshaft. Content of the Utility Model

[0003] The utility model provides a high-temperature reciprocating driving device with heating and anti-condensation functions to prevent outdoor cold air from entering the dust collector to form a condensation phenomenon.

[0004] To achieve the above object, the utility model provides a high-temperature reciprocating driving device with heating and anti-condensation functions, including a crankshaft and a connecting rod arranged in a flue gas passage. The flue gas passage includes an inner sealed box body and an outer heat-insulating shell. The inner sealed box body is arranged inside the outer heat-insulating shell. The crankshaft and the connecting rod are arranged inside the inner sealed box body. One end of the crankshaft is rotationally assembled with the connecting rod, and the other end extends out of the inner sealed box body and the outer heat-insulating shell in sequence and is connected with the output end of a speed reducer fixed outside the flue gas passage through a coupling. The outer wall of the crankshaft is rotationally assembled with the side wall of the inner sealed box body and is sealed and connected through a sealing structure. A heater for heating the crankshaft is also installed between the inner sealed box body and the outer heat-insulating shell.

[0005] In this embodiment, the crankshaft is connected with the inner sealed box body through a bearing, and the sealing structure adopts a stuffing box.

[0006] In this embodiment, a gap is provided between the inner sealed box body and the outer heat-insulating shell, and the gap is filled with heat-insulating cotton.

[0007] In this embodiment, the inner sealed box body is a passage with flanges at both ends, and the front flange of the inner sealed box body is sealed and connected with the air outlet of the bag filter.

[0008] In this embodiment, one end of the connecting rod is rotatably assembled on the connecting rod journal of the crankshaft, and the other end is connected to the power end of the flapping device for cleaning the filter bag.

[0009] In this embodiment, the heater includes a junction box, a dust-proof and heat-insulating cover, a spiral heating tube, and a mounting flange; the junction box and the dust-proof and heat-insulating cover are both fixed on the mounting flange, and the mounting flange is fixed on the inner wall of the outer heat-insulating shell. A heating cavity is provided at the position corresponding to the crankshaft inside the dust-proof and heat-insulating cover. The heating cavity is arranged coaxially with the crankshaft. A spiral heating tube arranged coaxially with the heating cavity is installed on the inner wall of the heating cavity. A temperature sensor is installed in the heating cavity, a controller is installed in the junction box, the spiral heating tube is electrically connected to the controller, a power regulator is installed outside the outer heat-insulating shell, and the power regulator is electrically connected to the controller.

[0010] With the above structure, the device converts the rotational motion of the reducer into a linear reciprocating motion through the crankshaft and the connecting rod. The crankshaft and the connecting rod are arranged in the inner sealed box structure. An outer heat-insulating shell is provided outside the inner sealed box, and heat-insulating cotton is filled between the outer heat-insulating shell and the sealed box to prevent the outside environmental temperature from affecting the flue gas temperature. And the device heats the crankshaft through the heater, and at the same time cooperates with the sealing gland to improve the sealing effect and ensure that the temperature of the crankshaft is not lower than the temperature of the flue gas inside the dust collector, thereby preventing the outdoor temperature from being transmitted into the inner sealed box through the crankshaft to cause condensation.

[0011] In summary, the present utility model is applied to the dust removal process of potassium chloride drying flue gas, provides power for the flapping device of the bag filter, and avoids the filter bag caking and chlorine-containing gas corrosion phenomena caused by condensation brought by conventional low-temperature compressed air pulse back blowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a perspective view of the present utility model.

[0013] Figure 2 is a top sectional view of the present utility model.

[0014] Figure 3 is a front view of the present utility model.

[0015] Figure 4 is a perspective view of the heater of the present utility model.

[0016] Figure 5 is a schematic internal structure diagram of the heater of the present utility model.

[0017] In the drawings, 1, reducer; 2, heater; 21, junction box; 22, dust-proof and heat-insulating cover; 23, heating cavity; 24, spiral heating tube; 25, mounting flange; 3, crankshaft; 4, inner sealed box; 5, outer heat-insulating shell; 6, connecting rod; 7, sealing gland. Detailed implementation mode

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0019] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0020] As Figures 1 to 3 shown, the present invention provides a high-temperature reciprocating drive device with heating and anti-condensation, including a crankshaft 3 and a connecting rod 6 arranged in a flue gas passage. The flue gas passage includes an inner sealed box body 4 and an outer heat-insulating shell 5. The inner sealed box body 4 is arranged inside the outer heat-insulating shell 5. There is a gap between the inner sealed box body 4 and the outer heat-insulating shell 5, and the gap is filled with heat-insulating cotton. The inner sealed box body 4 is a passage with flanges at both ends. The front flange of the inner sealed box body 4 is hermetically connected to the air outlet of the bag filter. The crankshaft 3 and the connecting rod 6 are arranged inside the inner sealed box body 4. One end of the crankshaft 3 is rotationally assembled with the connecting rod 6, and the other end extends out of the inner sealed box body 4 and the outer heat-insulating shell 5 in sequence and is connected to the output end of a speed reducer 1 fixed outside the flue gas passage through a coupling. The outer wall of the crankshaft 3 is rotationally assembled with the side wall of the inner sealed box body 4 and is hermetically connected through a sealing structure. A heater 2 for heating the crankshaft 3 is also installed between the inner sealed box body 4 and the outer heat-insulating shell 5. One end of the connecting rod 6 is rotationally assembled on the connecting rod journal of the crankshaft 3, and the other end is connected to the power end of a flapping device for cleaning the filter bag.

[0021] As Figure 4 、 5As shown, the heater 2 includes a junction box 21, a dust-proof and heat-insulating cover 22, a spiral heating tube 24, and a mounting flange 25; the junction box 21 and the dust-proof and heat-insulating cover 22 are both fixed on the mounting flange 25, and the mounting flange 25 is fixed on the inner wall of the outer heat-insulating shell 5. Inside the dust-proof and heat-insulating cover 22, a heating cavity 23 is provided at the corresponding position of the crankshaft 3. The heating cavity 23 is arranged coaxially with the crankshaft. A spiral heating tube 24 arranged coaxially with the heating cavity 23 is installed on the inner wall of the heating cavity 23. A temperature sensor is installed inside the heating cavity 23, and a controller is installed inside the junction box 21. The spiral heating tube 24 is electrically connected to the controller. A power regulator is installed outside the outer heat-insulating shell 5, and the power regulator is electrically connected to the controller. The crankshaft 3 passes through the spiral heating tube 24 coaxially, and the crankshaft 3 is heated by the spiral heating tube 24. And the temperature inside the heating cavity is detected by the temperature sensor, and the temperature inside the heating cavity is adjusted in real time to ensure that the temperature is stable at the set value, thereby preventing the crankshaft 3 from generating a condensation phenomenon due to low temperature.

[0022] As Figure 2 shown, the crankshaft 3 is connected to the inner sealed box body 4 through bearings. The sealing structure adopts a stuffing box 7. A plurality of packing rings are installed inside the stuffing box 7, and the packing rings are tightly pressed against the crankshaft 3 for sealing, so as to realize the sealed connection between the crankshaft 3 and the inner sealed box body 4.

[0023] The operation process of the present invention is as follows:

[0024] First, when the flue gas dust removal process after potassium chloride drying is in operation, the heater 2 is first turned on to heat the crankshaft 3. The crankshaft 3 is heated to 100°C to 150°C by the heater 2. When the air resistance rises to 1000 - 1500 Pa after continuous ash accumulation in the filter bag, the speed reducer 1 of this device is turned on, and the rotation speed of the speed reducer 1 is adjusted so that the beating frequency of the beating device reaches the set value. After the filter bag is beaten, the ash accumulated on the filter bag is shaken off, thereby restoring the ventilation performance of the filter bag.

[0025] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. All equivalent structural transformations made under the concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A high-temperature reciprocating drive device with heating and anti-condensation, comprising a crankshaft (3) and a connecting rod (6) arranged in a flue gas channel, characterized in that: The flue gas passage comprises an inner sealed box (4) and an outer heat-insulating shell (5); the inner sealed box (4) is arranged in the outer heat-insulating shell (5); the crankshaft (3) and the connecting rod (6) are arranged in the inner sealed box (4); one end of the crankshaft (3) is rotatably assembled with the connecting rod (6); the other end extends out from the inner sealed box (4) and the outer heat-insulating shell (5) in sequence and is connected to the output end of the reducer (1) fixed outside the flue gas passage through a coupling; the outer wall of the crankshaft (3) is rotatably assembled with the side wall of the inner sealed box (4) and is sealed and connected through a sealing structure; a heater (2) for heating the crankshaft (3) is also installed between the inner sealed box (4) and the outer heat-insulating shell (5).

2. A high temperature reciprocating drive device with heating and anti-condensation according to claim 1, characterized in that: The crankshaft (3) is connected to the inner sealing box (4) via a bearing, and the sealing structure adopts a sealing box (7).

3. A high temperature reciprocating drive device with heating and anti-condensation according to claim 1, characterized in that: A gap is provided between the inner sealed box body (4) and the outer heat-insulating shell (5), and the gap is filled with heat-insulating cotton.

4. A high temperature reciprocating drive device with heating and anti-condensation according to claim 1, characterized in that: The inner sealed box (4) is a channel with flanges at both ends, and the front end flange of the inner sealed box (4) is sealedly connected to the air outlet of the bag filter.

5. A high temperature reciprocating drive device with heating and anti-condensation according to claim 1, characterized in that: One end of the connecting rod (6) is rotatably mounted on the connecting rod (6) journal of the crankshaft (3), and the other end is connected to the power end of a beating device for cleaning the filter bag.

6. A high temperature reciprocating drive device with heating and anti-condensation according to any one of claims 1 to 5, characterized in that: The heater (2) comprises a junction box (21), a dustproof and heat-insulating shield, a spiral heating tube and a mounting flange (25); the junction box (21) and the dustproof and heat-insulating shield are both fixed on the mounting flange (25); the mounting flange (25) is fixed on the inner wall of the outer heat-insulating shell (5); a heating chamber (23) is provided in the dustproof and heat-insulating shield at a position corresponding to the crankshaft (3); the heating chamber (23) is coaxially arranged with the crankshaft (3); a spiral heating tube coaxially arranged with the heating chamber (23) is installed on the inner wall of the heating chamber (23); a temperature sensor is installed in the heating chamber (23); a controller is installed in the junction box (21); the spiral heating tube is electrically connected to the controller; a power regulator is installed outside the outer heat-insulating shell (5); the power regulator is electrically connected to the controller.

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