Energy-saving lime kiln for producing printing ink calcium

Abstract

The invention discloses an energy-saving lime kiln for producing printing ink calcium, which comprises a kiln body, feeding chambers are arranged on both sides of the kiln body, feeding mechanisms are arranged in the feeding chambers, a gas supply chamber is arranged below the kiln body, a gas supply pipeline is arranged in the gas supply chamber, a flue is arranged above the kiln body, and the flue is connected with a heat exchanger through a waste gas pipe. A hot air outlet pipe of the heat exchanger is respectively communicated with the feeding chamber and the air supply pipeline; a plurality of combustion fire grates which are distributed in a left-right and up-down staggered mode are arranged in the furnace body, blanking gaps are formed in the combustion fire grates, an inclined material guide plate is arranged between the upper combustion fire grate and the lower combustion fire grate, a combustion-supporting pipe is arranged between the left combustion fire grate and the right combustion fire grate, and air outlet branch pipes corresponding to the combustion fire grates respectively are arranged on the combustion-supporting pipe. The device has the characteristics that the raw material combustion sufficiency and uniformity are improved, and energy is saved.

Description

Technical Field

[0001] The invention relates to a lime kiln, in particular to an energy-saving lime kiln for producing ink calcium. Background Art

[0002] Lime kiln is an industrial equipment used to produce lime. It mainly includes a base and a furnace body. The inner cavity of the furnace body is the furnace. The limestone raw material is calcined in the furnace. By calcining limestone at high temperature, quicklime and by-product carbon dioxide are produced. There are various types of lime kilns, including rotary kilns, vertical kilns, double-beam kilns, etc. Different types of kilns are suitable for lime production of different scales and production requirements.

[0003] In the existing lime kiln, lime is generally poured onto a grate for combustion at one time. Due to the different volumes of limestone, a large amount of limestone is piled up on the grate. The large amount of limestone burned at one time easily causes the raw material to burn for a long time, and the combustion is uneven and insufficient, thus resulting in low utilization rate of the limestone raw material.

[0004] Moreover, air needs to be introduced into the limestone during calcination to ensure combustion. If low-temperature air is added, the temperature needs to be raised, which increases the processing time and cannot achieve the purpose of quickly calcining lime, reducing efficiency. If high-temperature air is added directly, a large amount of energy is required for heating, increasing energy consumption and production costs. Summary of the invention

[0005] The purpose of the present invention is to provide an energy-saving lime kiln for producing ink calcium, which has the characteristics of improving the completeness and uniformity of raw material combustion and saving energy.

[0006] The technical solution of the present invention is as follows: an energy-saving lime kiln for producing ink calcium comprises a furnace body, loading chambers are arranged on both sides of the furnace body, a loading mechanism is arranged in the loading chambers, an air supply chamber is arranged below the furnace body, an air supply pipe is arranged in the air supply chamber, a flue is arranged above the furnace body, the flue is connected to a heat exchanger via an exhaust gas pipe, and a hot gas outlet pipe of the heat exchanger is respectively connected to the loading chamber and the air supply pipe; a plurality of combustion grates are arranged in the furnace body, which are staggered left and right and up and down, a material dropping gap is arranged on the combustion grates, an inclined material guide plate is arranged between the upper and lower combustion grates, a combustion-supporting pipe is arranged between the left and right combustion grates, and the combustion-supporting pipe is provided with outlet branch pipes corresponding to the combustion grates respectively.

[0007] In the aforementioned energy-saving lime kiln for producing ink calcium, the combustion grate includes a frame, and protective covers are provided on the upper and lower sides of the frame, and ventilation gaps are provided on the protective covers. A first grate plate is provided in the upper protective cover, and a second grate plate is provided in the lower protective cover. The first grate plate is provided with a first blanking hole, and the second grate plate is provided with a second blanking hole and an air vent corresponding to the first blanking hole. A baffle connected to the bottom of the air vent via a torsion spring shaft is provided, and a fixed seat and a push rod are provided between the air vent and the first blanking hole. The upper end of the push rod is located in the first blanking hole, and the lower end of the push rod passes through the fixed seat and is located in the air vent. A moving rod is provided on the push rod, and the moving rod is located in the fixed seat and is connected to the fixed seat up and down through a connecting spring.

[0008] In the aforementioned energy-saving lime kiln for producing ink calcium, the combustion-supporting pipe includes a protective sleeve, a main channel in the shape of a zigzag line is provided in the protective sleeve, and curved semi-annular side channels are staggered on both sides of the main channel. The combustion-supporting gas is introduced into the positive inlet end of the main channel, and the gas outlet branch pipe is connected to the main channel.

[0009] In the aforementioned energy-saving lime kiln for producing ink calcium, the feeding mechanism includes an elevator, a spiral diverter device is provided at the outlet end of the elevator, a first conveyor and a second conveyor are provided at the outlet of the spiral diverter, the first conveyor corresponds to the combustion grate on the upper layer, the second conveyor corresponds to the combustion grate on the lower layer, and a feeding device is provided at the outlet of the first conveyor and the second conveyor.

[0010] In the aforementioned energy-saving lime kiln for producing ink calcium, the spiral diverter device includes a diverter body, a vibration motor is provided inside the diverter body, a base is connected to the bottom of the diverter body via a vibration spring, a material guide trough extending upward in a spiral shape is provided on the surface of the diverter body, a feed hopper corresponding to the outlet end of the elevator is provided at the inlet end of the material guide trough, a discharge trough extending outwardly to the first conveyor is provided at the outlet end of the material guide trough, a screen plate is provided at the bottom of the discharge trough, and a discharge hopper corresponding to the second conveyor is provided below the screen plate.

[0011] In the aforementioned energy-saving lime kiln for producing ink calcium, a fixed plate is provided above the diversion body, and crushing teeth facing the material guide trough are provided on the fixed plate, and a gap is left between the crushing teeth and the material guide trough.

[0012] In the aforementioned energy-saving lime kiln for producing ink calcium, the feeding device includes a feeding plate extending into the furnace body, one end of the feeding plate is hinged to the first conveyor or the second conveyor, and a crank driven by an active motor is provided under the feeding plate, a rocker is hinged on the crank, and the other end of the rocker is hinged to the feeding plate.

[0013] In the aforementioned energy-saving lime kiln for producing ink calcium, the heat exchanger includes a heat exchange shell, an isolation plate is provided in the heat exchange shell, the isolation plate divides the space in the heat exchange shell into a first heat exchange space and a second heat exchange space, the exhaust pipe is connected to the first heat exchange space, a plurality of rows of first heat exchange tubes distributed in an array are provided in the first heat exchange space, the outer wall of the first heat exchange tube is provided with a heat-conductive adsorption coating and a staggered cross-flow plate, the inlet of the first heat exchange tube is connected to the outside fresh air, the outlet of the first heat exchange tube is connected to the second heat exchange space, a serpentine second heat exchange tube is provided in the second heat exchange space, one end of the second heat exchange tube is connected to the first heat exchange space, the other end of the second heat exchange tube is connected to the exhaust gas discharge pipe, and the second heat exchange space is connected to the hot gas outlet pipe.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The high-temperature flue gas discharged from the lime kiln of the present invention is heat exchanged through a heat exchanger to achieve heat energy recovery, and the obtained high-temperature gas is connected to the feeding chamber and the gas supply pipeline. The hot gas introduced into the feeding chamber heats the limestone raw material, promotes the decomposition of calcium carbonate in the limestone raw material, and accelerates the subsequent calcination efficiency; the hot gas introduced into the gas supply pipeline heats the combustion-supporting gas, improves the combustion thermal efficiency, reduces fuel consumption, plays the role of energy saving and consumption reduction, improves energy utilization, reduces production costs, and accelerates the calcination speed of limestone to increase economic benefits. The present invention reduces the calcination time, improves the decomposition efficiency of limestone, improves the purity of the final product, improves the calcination uniformity, reduces the product quality fluctuation caused by uneven temperature, and improves the product quality.

[0016] The combustion grates arranged in the furnace body are staggered left and right and up and down, so that the furnace forms an S-shaped combustion channel. The combustion grate is provided with a material dropping gap. Through the design of the guide plate between the upper and lower combustion grates, the unburned raw materials fall from the upper combustion grate along the guide plate in an S shape to the lower combustion grate to continue burning, thereby extending its firing path and firing time, and also facilitating the S-shaped flow of flue gas in the combustion chamber from bottom to top, forming convection with the falling limestone in the combustion channel, and promoting the sufficient burning of limestone into lime.

[0017] A combustion-supporting pipe is set between the left and right combustion grates. Since the gas is introduced into the furnace body from bottom to top, most of the gas will be used by the lower combustion grate, resulting in insufficient combustion of the upper combustion grate. Using the combustion-supporting pipe to supplement the gas will help improve the combustion completeness of the upper combustion grate and the uniformity of raw material combustion.

[0018] Therefore, the present invention has the characteristics of improving the completeness and uniformity of raw material combustion and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a structural diagram of the combustion grate.

[0021] Figure 3 It is a structural diagram of the combustion-supporting tube.

[0022] Figure 4 It is a structural schematic diagram of the spiral diversion device.

[0023] Figure 5 It is a schematic diagram of the structure of the guide trough in the spiral diversion device.

[0024] Figure 6 It is a structural schematic diagram of the feeding device.

[0025] Figure 7 It is a structural diagram of the heat exchanger.

[0026] The marks in the attached drawings are: 1, furnace body; 2, loading chamber; 21, loading mechanism; 22, elevator; 23, spiral diverter; 231, diverter body; 232, vibration spring; 233, base; 234, guide trough; 235, feed hopper; 236, discharge trough; 237, screening plate; 238, discharge hopper; 239, fixed plate; 2391, crushing teeth; 24, first conveyor; 25, second conveyor; 26, feeding device; 261, feeding plate; 262, crank; 263, rocker; 3, air supply chamber; 31, air supply pipeline; 32, flue; 4, heat exchanger; 41, exhaust pipe; 4 2. Hot gas outlet pipe; 43. Heat exchange shell; 44. Isolation plate; 45. First heat exchange tube; 46. Thermal adsorption coating; 47. Cross-flow plate; 48. Second heat exchange tube; 5. Combustion grate; 51. Frame; 52. Protective cover; 53. Ventilation gap; 54. First grate plate; 55. Second grate plate; 56. First blanking hole; 57. Second blanking hole; 58. Air vent; 581. Baffle; 582. Fixed seat; 59. Push rod; 591. Moving rod; 592. Connecting spring; 6. Guide plate; 7. Combustion-supporting tube; 71. Outlet branch pipe; 72. Protective cover; 73. Main flow channel; 74. Side flow channel. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the embodiments, but they are not intended to limit the present invention.

[0028] Example:

[0029] like Figure 1-Figure 7As shown, an energy-saving lime kiln for producing ink calcium comprises a furnace body 1, loading chambers 2 are arranged on both sides of the furnace body 1, a loading mechanism 21 is arranged in the loading chamber 2, an air supply chamber 3 is arranged below the furnace body 1, an air supply pipe 31 is arranged in the air supply chamber 3, a flue 32 is arranged above the furnace body 1, the flue 32 is connected to the heat exchanger 4 via an exhaust pipe 41, and the hot air outlet pipe 42 of the heat exchanger 4 is connected to the loading chamber 2 and the air supply pipe 31 respectively; a plurality of combustion grates 5 staggeredly distributed left and right and up and down are arranged in the furnace body 1, a material dropping gap is arranged on the combustion grate 5, an inclined material guide plate 6 is arranged between the upper and lower combustion grates 5, a combustion-supporting pipe 7 is arranged between the left and right combustion grates 5, and the combustion-supporting pipe 7 is provided with air outlet branch pipes 71 corresponding to the combustion grates 5 respectively.

[0030] The high-temperature flue gas discharged from the lime kiln is heat exchanged by the heat exchanger 4 to realize heat energy recovery. The obtained high-temperature gas is connected to the feeding chamber 2 and the gas supply pipeline 31. The hot gas introduced into the feeding chamber 2 heats the limestone raw material, promotes the decomposition of calcium carbonate in the limestone raw material, and accelerates the subsequent calcination efficiency; the hot gas introduced into the gas supply pipeline 31 heats the combustion-supporting gas, improves the thermal efficiency of combustion, reduces fuel consumption, plays the role of energy saving and consumption reduction, improves energy utilization, reduces production costs, and accelerates the calcination speed of limestone to increase economic benefits. The present invention reduces the calcination time, improves the decomposition efficiency of limestone, improves the purity of the final product, improves the calcination uniformity, reduces the product quality fluctuation caused by uneven temperature, and improves the product quality.

[0031] The combustion grates 5 arranged in the furnace body 1 are staggered left and right and up and down, so that the furnace forms an S-shaped combustion channel. The combustion grate 5 is provided with a material dropping gap. Through the design of the guide plate 6 between the upper and lower combustion grates 5, the unburned raw materials fall from the upper combustion grate 5 along the guide plate 6 in an S shape to the lower combustion grate 5 to continue burning, thereby extending its firing path and firing time, and also facilitating the S-shaped flow of smoke in the combustion chamber from bottom to top, forming convection with the falling limestone in the combustion channel, and promoting the sufficient burning of limestone into lime.

[0032] A combustion-supporting pipe 7 is arranged between the left and right combustion grates 5. Since the gas is introduced into the furnace body 1 from bottom to top, most of the gas will be used by the combustion grate 5 on the lower layer, resulting in insufficient combustion of the combustion grate 5 on the upper layer. Supplementing the gas with the combustion-supporting pipe 7 helps to improve the combustion completeness of the combustion grate 5 on the upper layer and the uniformity of raw material combustion.

[0033] The combustion grate 5 includes a frame 51, and protective covers 52 are provided on the upper and lower sides of the frame 51. A ventilation gap 53 is provided on the protective cover 52. A first grate plate 54 is provided in the upper protective cover 52, and a second grate plate 55 is provided in the lower protective cover 52. The first grate plate 54 is provided with a first blanking hole 56, and the second grate plate 55 is provided with a second blanking hole 57 and an air vent 58 corresponding to the first blanking hole 56. A baffle 581 connected to the bottom of the air vent 58 via a torsion spring shaft is provided, and a fixed seat 582 and a push rod 59 are provided between the air vent 58 and the first blanking hole 56. The upper end of the push rod 59 is located in the first blanking hole 56, and the lower end of the push rod 59 passes through the fixed seat 582 and is located in the air vent 58. A moving rod 591 is provided on the push rod 59, and the moving rod 591 is located in the fixed seat 582 and is connected to the fixed seat 582 up and down through a connecting spring 592.

[0034] The first drop hole 56 on the first grate sheet 54 and the second drop hole 57 on the second grate sheet 55 form a drop gap for the combustion grate 5. The unburned raw materials fall from the first drop hole 56 to the second grate sheet 55, or fall from the second drop hole 57 to the combustion grate 5 on the lower layer to continue to burn. Multiple layers of combustion ensure sufficient combustion and reduce the waste of raw materials. Generally, the vent hole 58 of the second grate sheet 55 is blocked by the baffle 581. When there is too much raw material on the first grate sheet 54, the first drop hole 56 is blocked and squeezed to the push rod 59, so that the push rod 59 moves downward, and the lower end of the push rod 59 hits the baffle 581, and further pushes the baffle 581 to open the vent hole 58, thereby expanding the ventilation space, increasing the amount of gas entering the air supply chamber 3, and improving the combustion rate of the raw materials.

[0035] The combustion-supporting pipe 7 includes a protective sleeve 72, in which a main flow channel 73 in a zigzag shape is arranged, and side flow channels 74 in a semi-circular shape are staggered on both sides of the main flow channel 73. The combustion-supporting gas is introduced into the positive inlet end of the main flow channel 73, and the outlet branch pipe 71 is connected with the main flow channel 73. The combustion-supporting gas enters from the positive inlet of the main flow channel 73 of the combustion-supporting pipe 7. Through the special structural design of the main flow channel 73 and the side flow channel 74, the flow rate of the combustion-supporting gas ejected from the outlet branch pipe 71 can be increased, and the more upward the outlet branch pipe 71 is, the greater the flow rate of the combustion-supporting gas ejected, thereby facilitating the full combustion of the large-particle limestone in the upper combustion grate 5, improving the utilization rate of fuel, reducing the CO2 emission concentration, effectively achieving the energy-saving and emission reduction goals, and improving the production capacity of the lime kiln furnace. In addition, it is difficult for the flue gas to flow back from the outlet branch pipe 71, avoiding the flue gas backflow.

[0036] The feeding mechanism 21 includes an elevator 22, and a spiral diverter 23 is provided at the outlet end of the elevator 22. The outlet of the spiral diverter 23 is provided with a first conveyor 24 and a second conveyor 25. The first conveyor 24 corresponds to the combustion grate 5 of the upper layer, and the second conveyor 25 corresponds to the combustion grate 5 of the lower layer. The outlets of the first conveyor 24 and the second conveyor 25 are both provided with a feeding device 26. The original limestone is fed by the elevator 22 and transported to the spiral diverter 23 for diversion. A part of the limestone is fed to the combustion grate 5 of the upper layer through the first conveyor 24, and the other part is fed to the combustion grate 5 of the lower layer through the second conveyor 25, so as to realize diversion, transportation and combustion, make full use of fuel, improve the combustion sufficiency and uniformity of limestone raw materials, and improve calcination efficiency and product quality. Moreover, the limestone is lifted and fed by the elevator 22, so that it can fully contact with the high-temperature gas introduced by the heat exchanger 4, prolong the contact time with the high-temperature gas, and improve the preheating effect of the limestone.

[0037] The spiral diverter device 23 includes a diverter body 231, a vibration motor is provided inside the diverter body 231, a base 233 is connected to the bottom of the diverter body 231 via a vibration spring 232, a guide groove 234 is provided on the surface of the diverter body 231 and extends upward in a spiral shape, a feed hopper 235 corresponding to the outlet end of the elevator 22 is provided at the inlet end of the guide groove 234, a discharge groove 236 extending outwardly to correspond to the first conveyor 24 is provided at the outlet end of the guide groove 234, a sub-screen plate 237 is provided at the bottom of the discharge groove 236, and a discharge hopper 238 corresponding to the second conveyor 25 is provided below the sub-screen plate 237. The limestone raw material is conveyed by the elevator 22 into the guide trough 234 of the spiral diverter device 23, and the vibration motor drives the diverter body 231 to vibrate, so that the limestone raw material moves spirally along the guide trough 234 while turning over, thereby increasing the contact area and time between the limestone raw material and the high-temperature gas introduced into the heat exchanger 4, improving the heat exchange efficiency, and increasing the temperature of the limestone raw material to facilitate subsequent combustion; and the limestone is sieved by the sieve plate 237 in the discharge trough 236, and the large-sized limestone is conveyed to the upper combustion grate 5 through the first conveyor 24, so as to perform multiple combustion and improve the combustion completeness; the small-sized limestone is conveyed to the lower combustion grate 5 through the second conveyor 25, which speeds up the combustion speed, improves the combustion efficiency, and saves gas.

[0038] A fixing plate 239 fixedly connected to the base 233 is provided above the diverter body 231, and crushing teeth 2391 facing the guide trough 234 are provided on the fixing plate 239, and a gap is left between the crushing teeth 2391 and the guide trough 234. When the diverter body 231 vibrates, it drives the limestone raw materials on the guide trough 234 to approach the crushing teeth 2391, so that the crushing teeth 2391 are used to cut the limestone raw materials with large particle sizes, thereby facilitating the rapid and full combustion of the limestone.

[0039] The feeding device 26 includes a feeding plate 261 extending into the furnace body 1, one end of the feeding plate 261 is hinged to the first conveyor 24 or the second conveyor 25, a crank 262 driven by an active motor is provided below the feeding plate 261, a rocker 263 is hinged to the crank 262, and the other end of the rocker 263 is hinged to the feeding plate 261. The first conveyor 24 and the second conveyor 25 both convey the limestone raw material to the feeding plate 261, and the feeding plate 261 swings back and forth under the drive of the crank 262 and the rocker 263, so that the limestone raw material on the feeding plate 261 is evenly laid on the combustion grate 5, thereby improving the combustion uniformity.

[0040] The heat exchanger 4 includes a heat exchange shell 43, in which an isolation plate 44 is provided. The isolation plate 44 divides the space in the heat exchange shell 43 into a first heat exchange space and a second heat exchange space. The exhaust pipe 41 is connected to the first heat exchange space. A plurality of rows of first heat exchange tubes 45 distributed in an array are provided in the first heat exchange space. The outer walls of the first heat exchange tubes 45 are provided with a thermal adsorption coating 46 and staggered cross-flow plates 47. The inlets of the first heat exchange tubes 45 are connected to the outside fresh air, and the outlets of the first heat exchange tubes 45 are connected to the second heat exchange space. A serpentine second heat exchange tube 48 is provided in the second heat exchange space. One end of the second heat exchange tube 48 is connected to the first heat exchange space, and the other end of the second heat exchange tube 48 is connected to the exhaust gas discharge pipe. The second heat exchange space is connected to the hot gas outlet pipe 42.

[0041] The high-temperature exhaust gas discharged from the flue 32 of the lime kiln enters the heat exchanger 4 through the exhaust pipe 41, and the exhaust gas first enters the first heat exchange space, and the new air from the outside enters the first heat exchange pipe 45, and the exhaust gas and the new air in the first heat exchange pipe 45 are subjected to the first heat exchange, and then the new air in the first heat exchange pipe 45 enters the second heat exchange space, and the exhaust gas enters the second heat exchange pipe 48 of the second heat exchange space and the new air is subjected to the second heat exchange, which greatly increases the heat absorption of the new air, so that the new air forms high-temperature gas and is discharged through the hot gas outlet pipe 42;

[0042] A thermally conductive adsorption coating 46 is provided on the outside of the first heat exchange tube 45, and high-temperature particles in the exhaust gas are adsorbed thereon, which can continuously exchange heat with the new air in the first heat exchange tube 45 and is easy to clean, thereby preventing smoke and dust from accumulating in the second heat exchange tube 48 and clogging the second heat exchange tube 48; a cross-flow plate 47 is provided on the outside of the first heat exchange tube 45, and the second heat exchange tube 48 is serpentine, which prolongs the heat exchange time and heat exchange area between the exhaust gas and the new air and improves the heat exchange efficiency and effect.

[0043] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present invention.

Claims

1. An energy-saving lime kiln for producing ink calcium, characterized in that: The invention comprises a furnace body (1), wherein both sides of the furnace body (1) are provided with a loading chamber (2), a loading mechanism (21) is provided in the loading chamber (2), an air supply chamber (3) is provided below the furnace body (1), an air supply pipe (31) is provided in the air supply chamber (3), a flue (32) is provided above the furnace body (1), the flue (32) is connected to a heat exchanger (4) via an exhaust pipe (41), and a hot gas outlet pipe (42) of the heat exchanger (4) is respectively connected to the loading chamber (2) and the air supply pipe (31); a plurality of combustion grates (5) are arranged in the furnace body (1) in an alternating manner from left to right and from top to bottom, a material drop gap is provided on the combustion grates (5), an inclined material guide plate (6) is provided between the upper and lower combustion grates (5), a combustion-supporting pipe (7) is provided between the left and right combustion grates (5), and the combustion-supporting pipe (7) is provided with outlet branch pipes (71) respectively corresponding to the combustion grates (5).

2. The energy-saving lime kiln for producing ink calcium according to claim 1, characterized in that: The combustion grate (5) comprises a frame (51), wherein upper and lower sides of the frame (51) are provided with protective covers (52), a ventilation gap (53) is provided on the protective cover (52), a first grate plate (54) is provided in the upper protective cover (52), a second grate plate (55) is provided in the lower protective cover (52), the first grate plate (54) is provided with a first blanking hole (56), the second grate plate (55) is provided with a second blanking hole (57) corresponding to the first blanking hole (56) and a vent (58), and the vent (58) is provided. 8) is provided at the bottom thereof with a baffle (581) connected via a torsion spring rotating shaft, a fixing seat (582) and a push rod (59) are provided between the vent hole (58) and the first blanking hole (56), the upper end of the push rod (59) is located in the first blanking hole (56), the lower end of the push rod (59) passes through the fixing seat (582) and is located in the vent hole (58), a moving rod (591) is provided on the push rod (59), the moving rod (591) is located in the fixing seat (582) and is connected to the fixing seat (582) up and down via a connecting spring (592).

3. The energy-saving lime kiln for producing ink calcium according to claim 1, characterized in that: The combustion-supporting pipe (7) comprises a protective sleeve (72), a main flow channel (73) in the form of a broken line is arranged in the protective sleeve (72), side flow channels (74) bent in the form of semi-circular shapes are staggeredly distributed on both sides of the main flow channel (73), the combustion-supporting gas is introduced into the positive inlet end of the main flow channel (73), and the gas outlet branch pipe (71) is connected to the main flow channel (73).

4. The energy-saving lime kiln for producing ink calcium according to claim 1, characterized in that: The feeding mechanism (21) comprises an elevator (22), the outlet end of the elevator (22) is provided with a spiral diverter (23), the outlet of the spiral diverter (23) is provided with a first conveyor (24) and a second conveyor (25), the first conveyor (24) corresponds to the combustion grate (5) on the upper layer, the second conveyor (25) corresponds to the combustion grate (5) on the lower layer, and the outlets of the first conveyor (24) and the second conveyor (25) are both provided with a feeding device (26).

5. The energy-saving lime kiln for producing ink calcium according to claim 4, characterized in that: The spiral diverter device (23) comprises a diverter body (231), a vibration motor is arranged inside the diverter body (231), a base (233) is connected to the bottom of the diverter body (231) via a vibration spring (232), a guide trough (234) extending upward in a spiral shape is arranged on the surface of the diverter body (231), a feed hopper (235) corresponding to the outlet end of the elevator (22) is arranged at the inlet end of the guide trough (234), a discharge trough (236) extending outwardly to correspond to the first conveyor (24) is arranged at the outlet end of the guide trough (234), a screening plate (237) is arranged at the bottom of the discharge trough (236), and a discharge hopper (238) corresponding to the second conveyor (25) is arranged below the screening plate (237).

6. The energy-saving lime kiln for producing ink calcium according to claim 5, characterized in that: A fixing plate (239) is provided above the diversion body (231), and a crushing tooth (2391) facing the material guide groove (234) is provided on the fixing plate (239), and a gap is left between the crushing tooth (2391) and the material guide groove (234).

7. The energy-saving lime kiln for producing ink calcium according to claim 4, characterized in that: The feeding device (26) comprises a feeding plate (261) extending into the furnace body (1), one end of the feeding plate (261) being hinged to the first conveyor (24) or the second conveyor (25), a crank (262) driven by an active motor being provided below the feeding plate (261), a rocker (263) being hinged to the crank (262), and the other end of the rocker (263) being hinged to the feeding plate (261).

8. The energy-saving lime kiln for producing ink calcium according to claim 1, characterized in that: The heat exchanger (4) comprises a heat exchange shell (43), an isolation plate (44) is provided in the heat exchange shell (43), the isolation plate (44) divides the space in the heat exchange shell (43) into a first heat exchange space and a second heat exchange space, the exhaust pipe (41) is connected to the first heat exchange space, a plurality of rows of first heat exchange tubes (45) arranged in an array are provided in the first heat exchange space, the outer wall of the first heat exchange tube (45) is provided with a heat conductive adsorption coating (46) and staggered cross-flow plates (47), the inlet of the first heat exchange tube (45) is connected to the outside fresh air, the outlet of the first heat exchange tube (45) is connected to the second heat exchange space, a serpentine second heat exchange tube (48) is provided in the second heat exchange space, one end of the second heat exchange tube (48) is connected to the first heat exchange space, the other end of the second heat exchange tube (48) is connected to the exhaust gas discharge pipe, and the second heat exchange space is connected to the hot gas outlet pipe (42).

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