An RKEF multi-line flue gas waste heat utilization device

Abstract

The present invention discloses an RKEF multi-line flue gas waste heat utilization device, which includes a kiln head air mixing chamber. The kiln head air mixing chamber is connected to an air inlet pipe, and the air inlet pipe is connected to a connecting pipe. An induced draft fan is arranged on the connecting pipe. A first regulating valve is arranged between the kiln head air mixing chamber and the heat supplement air mixing chamber. The heat supplement air mixing chamber is connected to a vertical coal mill through a connecting pipe, and a cold air continuous regulating valve is arranged between the heat supplement air mixing chamber and the vertical coal mill. At the same time, both the first regulating valve and the cold air continuous regulating valve are connected to the connecting pipe. This RKEF multi-line flue gas waste heat utilization device uses multiple kiln head air mixing chambers to supply flue gas. Compared with the traditional single production line waste heat utilization, it has higher stability and stronger flexibility. Cooperating with the flue gas treatment structure, it realizes the purification and drying of flue gas, avoiding damage to the vertical coal mill caused by flue gas. Cooperating with the voltage stabilizing mechanism, it can ensure the stability of the flue gas flow rate.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas waste heat utilization devices, and specifically to an RKEF multi-line flue gas waste heat utilization device. Background Art

[0002] During the production of nickel-iron, a large amount of high-temperature flue gas is generated. To avoid energy waste, flue gas reuse is usually adopted to achieve energy conservation and emission reduction. However, there are still certain defects in the existing flue gas waste heat utilization devices when in use;

[0003] For example, in the industrial silicon furnace flue gas waste heat utilization device disclosed in CN212806579U, through the settings of structures such as a heat preservation water tank, a rectangular connecting pipe, a gas guiding coil pipe, and heat conducting fins, the high-temperature flue gas discharged from the silicon furnace can pass through the heat preservation water tank, thereby uniformly heating the water in the heat preservation water tank... And when the motor operates, the fixed frame can circulate left and right, shaking off the impurities attached to the filter screen, effectively ensuring the air permeability of gas transmission;

[0004] This existing technical solution still has the following problems when in use:

[0005] 1. It is inconvenient to stabilize the pressure of the flue gas, resulting in unstable flue gas flow rate in the pipeline, and further affecting waste heat utilization;

[0006] 2. When dust removal is carried out, it is inconvenient to clean the dust removal mechanism, thus affecting the normal progress of subsequent dust removal, etc.;

[0007] Therefore, improvements need to be made to the above problems. Summary of the Invention

[0008] The purpose of the present invention is to provide an RKEF multi-line flue gas waste heat utilization device to solve the problems of inconvenient flue gas pressure stabilization and inconvenient flue gas pressure stabilization mentioned in the above background art.

[0009] To achieve the above purpose, the present invention provides the following technical solution: An RKEF multi-line flue gas waste heat utilization device, comprising:

[0010] A kiln head mixing chamber, which is connected to an air inlet pipe, and the air inlet pipe is connected to a connecting pipe. An induced draft fan is provided on the connecting pipe. At the same time, the connecting pipe is connected to a supplementary heat mixing chamber. A first regulating valve is provided between the mixing chamber and the supplementary heat mixing chamber. The supplementary heat mixing chamber is connected to a vertical coal mill through a connecting pipe. A cold air continuous regulating valve is provided between the supplementary heat mixing chamber and the vertical coal mill. At the same time, both the first regulating valve and the cold air continuous regulating valve are connected to the connecting pipe. A dust cleaning port is opened at the lower end of the kiln head mixing chamber;

[0011] The water pump is fixed on the air mixing chamber at the kiln head, and the water pump is connected to the hydrogen peroxide spray head through a water pipe, and the hydrogen peroxide spray heads are fixed on the air mixing chamber at the kiln head at equal intervals;

[0012] The dehumidification plate is fixed on the air mixing chamber at the kiln head, and a movable plate is arranged on the side of the dehumidification plate, and the movable plate is slidably connected to the air mixing chamber at the kiln head.

[0013] Preferably, the air mixing chamber at the kiln head is connected with a rotating shaft through a bearing, and fixing plates are symmetrically fixed on the rotating shaft. When dust removal is carried out, the rotation of the rotating shaft is the basic guarantee for realizing automatic dust cleaning.

[0014] Preferably, a rotatable dust removal plate is connected to the fixing plate through a columnar shaft, and the dust removal plate is connected to the fixing plate through a torsion spring. Through the rotation of the dust removal plate and the elastic action of the torsion spring, the dust removal plate can generate vibration, so that the dust on the dust removal plate falls off.

[0015] Preferably, convex rods are symmetrically arranged on the side of the dust removal plate, and the convex rods can slide between the dust removal plate and the dust removal plate, and the convex rods are fixed on the air mixing chamber at the kiln head. When the convex rods contact the dust removal plate, it provides the basic acting force for the rotation of the dust removal plate.

[0016] Preferably, the dust removal plate, the hydrogen peroxide spray head and the dehumidification plate are distributed from left to right in sequence, and the dehumidification plate is a mesh structure. Through the above structure, dust removal, denitrification and drying of the flue gas are realized, so as to realize the purification of the flue gas and avoid secondary hazards caused by the flue gas.

[0017] Preferably, a sealing plug and a first spring are further arranged on the movable plate;

[0018] The sealing plug is fixed on the movable plate, and the sealing plug and the right-end opening of the sealing plug form a sealing mechanism;

[0019] The first springs are symmetrically fixed on the movable plate, and the other ends of the first springs are fixed on the air mixing chamber at the kiln head. Through the above mechanism, a pressure stabilizing mechanism is formed to ensure the pressure in the air mixing chamber at the kiln head, so as to ensure the stability of the flue gas flow, and further ensure the normal utilization of the waste heat.

[0020] Compared with the prior art, the beneficial effects of the present invention are: the RKEF multi-line flue gas waste heat utilization device uses multiple air mixing chambers at the kiln head to provide flue gas. Compared with the traditional single production line waste heat utilization, it has higher stability and stronger flexibility. Combined with the flue gas treatment structure, it realizes the purification and drying of the flue gas, avoids damage to the vertical mill caused by the flue gas, and combined with the pressure stabilizing mechanism, it can ensure the stability of the flue gas flow.

[0021] 1. When removing ash from flue gas, the dust removal plate is driven to rotate by the flue gas. When the dust removal plate contacts the convex rod, the dust removal plate rotates under the force. When the dust removal plate separates from the convex rod, the dust removal plate returns to its original position under the action of the torsion spring and generates vibration, thereby realizing the automatic cleaning of the dust removal plate and ensuring the normal progress of ash removal from flue gas.

[0022] 2. When the flue gas generation amount is small, sealing is achieved through the action of the sealing plug, so that the flue gas is stored in the mixing chamber at the kiln head until the pressure in the mixing chamber at the kiln head reaches a certain value. At this time, under the action of the pressure, the movable plate moves to facilitate the flow of the flue gas. Through the action of the mixing chamber at the kiln head, the stability of the flue gas in the connecting pipe is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic top view structure diagram of the whole invention;

[0024] Figure 2 It is a schematic front sectional view structure diagram of the mixing chamber at the kiln head of the invention;

[0025] Figure 3 For the present invention Figure 2 The enlarged structure diagram at A in;

[0026] Figure 4 For the present invention Figure 2 The enlarged structure diagram at B in;

[0027] Figure 5 It is a schematic top sectional view structure diagram of the rotating shaft of the invention;

[0028] Figure 6 It is a schematic overall process structure diagram of the invention.

[0029] In the figure: 1. Mixing chamber at the kiln head; 2. Air inlet pipe; 3. Connecting pipe; 4. Induced draft fan; 5. First regulating valve; 6. Supplementary heat mixing chamber; 7. Cold air continuous regulating valve; 8. Vertical coal mill; 9. Ash cleaning port; 10. Water pump; 11. Rotating shaft; 1101. Fixed plate; 12. Dust removal plate; 13. Torsion spring; 14. Water pipe; 15. Hydrogen peroxide spray head; 16. Dehumidification plate; 17. Convex rod; 18. Movable plate; 1801. Sealing plug; 1802. First spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer toFigures 1-6 , the present invention provides a technical solution: an RKEF multi-line flue gas waste heat utilization device, comprising:

[0032] A kiln head mixing chamber 1, the kiln head mixing chamber 1 is connected to an air inlet pipe 2, and the air inlet pipe 2 is connected to a connecting pipe 3, and an induced draft fan 4 is provided on the connecting pipe 3. At the same time, the connecting pipe 3 is connected to a heat supplement mixing chamber 6. A first regulating valve 5 is provided between the kiln head mixing chamber 1 and the heat supplement mixing chamber 6. And the heat supplement mixing chamber 6 is connected to a vertical coal mill 8 through the connecting pipe 3. A cold air continuous regulating valve 7 is provided between the heat supplement mixing chamber 6 and the vertical coal mill 8. At the same time, both the first regulating valve 5 and the cold air continuous regulating valve 7 are connected to the connecting pipe 3. A dust cleaning port 9 is opened at the lower end of the kiln head mixing chamber 1;

[0033] A water pump 10, fixed on the kiln head mixing chamber 1, and the water pump 10 is connected to a hydrogen peroxide spray head 15 through a water pipe 14. And the hydrogen peroxide spray heads 15 are equally spaced and fixed on the kiln head mixing chamber 1;

[0034] A dehumidification plate 16, fixed on the kiln head mixing chamber 1, and a movable plate 18 is provided on the side of the dehumidification plate 16. And the movable plate 18 is slidably connected to the kiln head mixing chamber 1.

[0035] The kiln head mixing chamber 1 is connected to a rotating shaft 11 through a bearing, and fixing plates 1101 are symmetrically fixed on the rotating shaft 11; A rotatable dust removal plate 12 is connected to the fixing plate 1101 through a columnar shaft. And the dust removal plate 12 is connected to the fixing plate 1101 through a torsion spring 13; Convex rods 17 are symmetrically provided on the side of the dust removal plate 12. And the convex rods 17 can slide with respect to the dust removal plate 12. And the convex rods 17 are fixed on the kiln head mixing chamber 1; The dust removal plate 12, the hydrogen peroxide spray head 15 and the dehumidification plate 16 are arranged in sequence from left to right. And the dehumidification plate 16 is a mesh structure.

[0036] When using this device, first connect and install the entire device according to Figure 1 shown. The high-temperature flue gas first enters the kiln head mixing chamber 1 through the air inlet pipe 2. Under the action of the air flow, the dust removal plate 12 is driven to rotate, realizing the adsorption of dust in the flue gas. And during the rotation of the dust removal plate 12, when the dust removal plate 12 contacts the convex rod 17, the dust removal plate 12 rotates around the fixing plate 1101 under the action of force. When the dust removal plate 12 separates from the convex rod 17, the dust removal plate 12 returns to its original position under the action of the torsion spring 13. Thereby causing the dust removal plate 12 to vibrate, realizing the automatic cleaning of the dust adhered to the dust removal plate 12. The flue gas after dust removal flows backward. At this time, the solution is conveyed to the hydrogen peroxide spray head 15 through the action of the water pump 10 and the water pipe 14, realizing the denitrification of the flue gas. Finally, the flue gas after dust removal and denitrification is dried through the dehumidification plate 16 to ensure the cleanliness of the flue gas.

[0037] A sealing plug 1801 and a first spring 1802 are also provided on the movable plate 18; the sealing plug 1801 is fixed on the movable plate 18, and the sealing plug 1801 and the right-end opening of the sealing plug 1801 form a sealing mechanism; the first spring 1802 is symmetrically fixed on the movable plate 18, and the other end of the first spring 1802 is fixed on the mixing chamber 1 at the kiln head.

[0038] The treated flue gas is conveyed backward through the connecting pipe 3, and enters the supplementary heat mixing chamber 6 under the action of the induced draft fan 4. The flue gas is heated up through the supplementary heat mixing chamber 6 to ensure the temperature of the flue gas. Finally, the temperature adjustment is realized through the action of the cold air continuous regulating valve 7, so that the temperature of the flue gas is above 220 degrees when it enters the vertical coal mill 8, thus ensuring the normal operation of the vertical coal mill 8. When the flue gas concentration in the mixing chamber 1 at the kiln head is low, at this time, under the action of the first spring 1802, the sealing plug 1801 seals the outlet, avoiding unstable operation of the device due to insufficient flue gas. And through the action of multiple mixing chambers 1 at the kiln head, complementarity can be achieved, and mutual switching can be realized in cooperation with the action of the first regulating valve 5, so as to ensure the normal operation of the device. Through the above design, without increasing the cost, both the normal production of the heat-using equipment is ensured, and the energy consumption problem of the supplementary heating furnace is saved.

[0039] Working principle: As Figures 1-6 shown, when using this device, first connect and install the whole device according to Figure 1 shown. The high-temperature flue gas first enters the mixing chamber 1 at the kiln head through the air inlet pipe 2. Under the action of the air flow, the flue gas is dust-removed through the rotation of the dust-removing plate 12. The automatic cleaning function of the dust-removing plate 12 is realized in cooperation with the action of the convex rod 17 and the torsion spring 13. Then, the solution is sprayed through the hydrogen peroxide nozzle 15 to realize denitrification, and drying is carried out in cooperation with the dehumidifying plate 16 to ensure the cleanliness of the flue gas. Finally, the flue gas enters the supplementary heat mixing chamber 6 for heating up, and the temperature adjustment is realized in cooperation with the action of the cold air continuous regulating valve 7 to ensure that the temperature of the flue gas is above 220 degrees when it enters the vertical coal mill 8, thereby ensuring the normal operation of the vertical coal mill 8. When the flue gas is insufficient, the mutual switching of the mixing chamber 1 at the kiln head is realized in cooperation with the action of the automatic sealing mechanism and the first regulating valve 5, so as to ensure the flue gas volume, and thus ensure the normal operation of the vertical coal mill 8. Through the above design, without increasing the cost, both the normal production of the heat-using equipment is ensured, and the energy consumption problem of the supplementary heating furnace is saved. This is the working principle of the RKEF multi-line flue gas waste heat utilization device.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An RKEF multi-line flue gas waste heat utilization device, characterized in that Comprising: A preheater mixing chamber at the kiln head, which is connected to an air inlet pipe, and the air inlet pipe is connected to a connecting pipe. An induced draft fan is provided on the connecting pipe, and the connecting pipe is connected to a supplementary heat mixing chamber. A first regulating valve is provided between the preheater mixing chamber at the kiln head and the supplementary heat mixing chamber. The supplementary heat mixing chamber is connected to a vertical coal mill through a connecting pipe, and a cold air continuous regulating valve is provided between the supplementary heat mixing chamber and the vertical coal mill. Both the first regulating valve and the cold air continuous regulating valve are connected to the connecting pipe. A dust cleaning port is provided at the lower end of the preheater mixing chamber at the kiln head; A water pump, fixed on the preheater mixing chamber at the kiln head, and the water pump is connected to a hydrogen peroxide spray head through a water pipe, and the hydrogen peroxide spray heads are fixed on the preheater mixing chamber at the kiln head at equal intervals; A dehumidification plate, fixed on the preheater mixing chamber at the kiln head, and a movable plate is provided on the side of the dehumidification plate, and the movable plate is slidably connected to the preheater mixing chamber at the kiln head; The preheater mixing chamber at the kiln head is connected to a rotating shaft through a bearing, and fixing plates are symmetrically fixed on the rotating shaft; A rotatable dust removal plate is connected to the fixing plate through a columnar shaft, and the dust removal plate is connected to the fixing plate through a torsion spring; Convex rods are symmetrically provided on the side of the dust removal plate, and the convex rods can slide with respect to the dust removal plate, and the convex rods are fixed on the preheater mixing chamber at the kiln head; A sealing plug and a first spring are further provided on the movable plate; The sealing plug, fixed on the movable plate, and the sealing plug and the right end opening of the sealing plug form a sealing mechanism; The first springs, symmetrically fixed on the movable plate, and the other ends of the first springs are fixed on the preheater mixing chamber at the kiln head.

2. The RKEF multi-line flue gas waste heat utilization device according to claim 1, wherein: The dust removal plate, the hydrogen peroxide spray head, and the dehumidification plate are arranged in sequence from left to right, and the dehumidification plate is of a mesh structure.

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