A yellow phosphorus raw material drying flue gas dust removal system based on phosphorus furnace tail gas
By combining cyclone dust collector and electro-dust collector in the yellow phosphorus raw material drying flue gas dust removal system, the combined structure of the gas barrier plate, anode plate and cathode plate is used to solve the problems of low dust removal efficiency and difficult to remove fine particles, achieving efficient and stable dust removal effect and cost reduction.
Patent Information
- Application Number
- CN202420558561.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-03-21
AI Technical Summary
In the prior art, when using the phosphorus furnace exhaust gas to dry yellow phosphorus raw materials, the flue gas dust removal efficiency is low, the cost is high, and the fine particles are difficult to be effectively removed.
Using a system composed of a cyclone dust collector and an electro-dust collector, the cyclone dust collector initially removes large particles of dust. The electro-dust collector increases the residence time of the flue gas in the electric field area through the combined structure of the air barrier plate, the anode plate and the cathode plate, thereby achieving effective dust removal of fine particles.
The stable and continuous operation of flue gas dust removal is achieved, the dust removal efficiency and effect is improved, the operating cost is reduced, and the problem of micro particles escape is solved.
Smart Images
Figure CN222694985U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of phosphorus chemical industry, in particular to a yellow phosphorus raw material drying fume dust removal system based on phosphorus furnace tail gas. Background Art
[0002] The yellow phosphorus production process is to put phosphate ore, coke and silica raw materials into the electric furnace in proportion for reaction, then spray cool the furnace gas to obtain crude phosphorus, and then introduce the crude phosphorus into the refining tank for refining, and finally obtain the yellow phosphorus product. The uncondensed furnace gas is the phosphorus furnace tail gas, which is rich in carbon monoxide and contains impurities such as phosphorus, sulfur, arsenic, and fluorine. The by-product tail gas produced for each ton of yellow phosphorus is about 2500 to 3000m³. Part of these phosphorus furnace tail gases are used for drying raw materials, part of them are used for phosphorus furnace tail gas boilers, and the rest are ignited and vented. When the phosphorus furnace tail gas is used to dry the yellow phosphorus raw materials, a large amount of flue gas will be generated. These flue gases contain a large amount of dust and particles of different particle sizes. The flue gas needs to be dusted and purified before it is discharged.
[0003] At present, when the yellow phosphorus raw material drying flue gas is dedusted, bag dust removal devices, spray dust removal devices or electrostatic dust removal devices are mainly used. When the bag dust removal device is used, the filter bag is often burned due to the high flue gas temperature, and the filter bag is replaced frequently, resulting in problems such as discontinuous and stable dust removal, low dust removal efficiency and high dust removal cost; when the spray dust removal device is used to dedust the flue gas, there are problems such as complex structure and operation, large water resource consumption and high cost; when the electrostatic dust removal device is used, the dust can only be positively charged or negatively charged in the high-voltage electric field area, and the flue gas flow rate is fast, and the time it stays in the electric field area is short, which makes it impossible or too late for fine particles with very small diameters to condense in the dust removal cavity, resulting in the problem of a large number of fine particles escaping, and the dust removal effect of the flue gas is not good. Therefore, it is an objective need to develop a yellow phosphorus raw material drying flue gas dedusting system based on phosphorus furnace tail gas with stable operation, high dust removal efficiency and ideal dust removal effect. Utility Model Content
[0004] The utility model aims to provide a yellow phosphorus raw material drying flue gas dust removal system based on phosphorus furnace tail gas, which has stable operation, high dust removal efficiency and ideal dust removal effect.
[0005] The purpose of the utility model is achieved in this way, including a cyclone dust collector and an electrostatic precipitator connected in sequence, the internal space of the electrostatic precipitator is divided into a dust removal chamber and an ash storage chamber by a grate plate, the dust removal chamber is respectively provided with an air inlet and an air outlet in the middle of two opposite side walls, an air baffle is provided in the dust removal chamber near the air inlet, ventilation channels are left between the two sides of the air baffle and the side walls of the dust removal chamber, an insulating partition is provided in the middle of the side of the air baffle facing the air outlet, and dust removal mechanisms are symmetrically arranged on both sides of the insulating partition, each dust removal mechanism includes a plurality of mounting blocks arranged at staggered intervals, anode plates and cathode plates are alternately installed on the plurality of mounting blocks in sequence, and the anode plates and cathode plates are arranged parallel to each other.
[0006] Furthermore, an anti-collision plate is arranged in the middle of the side surface of the air baffle plate facing the air inlet.
[0007] Furthermore, a plurality of dust shielding rings are concentrically arranged on the side surface of the air shielding plate facing the air inlet, and each dust shielding ring includes a plurality of dust shielding arc plates uniformly distributed around the circumference.
[0008] Furthermore, a slide groove is vertically processed on the end surface of the mounting block, the anode plate and the cathode plate are inserted into the slide groove, and the top plate and the side wall of the electrostatic precipitator are connected by a flange.
[0009] Furthermore, a fixing rod is arranged between two adjacent anode plates and cathode plates, one end of the fixing rod is fixed to the side wall of the electrostatic precipitator, and the other end is fixed to the insulating partition, and a plurality of V-shaped diverter plates are arranged at intervals on the fixing rod.
[0010] Furthermore, an activated carbon layer is arranged inside the electrostatic precipitator near the gas outlet.
[0011] When the utility model is in operation, the large dust particles in the flue gas are first removed by the cyclone dust collector, and then the flue gas is passed into the electrostatic precipitator. The flue gas rushes from the air inlet to the air baffle plate, and some of the dust particles therein hit the air baffle plate and are separated from the flue gas. Subsequently, the flue gas flows into the dust removal chamber from the ventilation channels on both sides of the air baffle plate, and is deflected back and forth along the air flow channel formed between the anode plate and the cathode plate in the dust removal chamber, and is discharged from the air outlet after passing through the electrostatic precipitator. In the above process, the cyclone dust collector and the electrostatic precipitator are combined to remove the dust in the smoke. Compared with the bag dust removal and spray dust removal methods, there is no need to frequently replace the filter bags, ensuring that the entire dust removal system can operate stably and continuously for a long time, improving the dust removal efficiency, and not consuming water resources, thereby reducing the operating costs. Secondly, when performing the electrostatic precipitator treatment, on the one hand, through the collision of the flue gas with the air baffle plate, some of the large dust particles are further removed, reducing the load of the subsequent electrostatic precipitator. On the other hand, the flue gas is diverted by the air baffle plate, which reduces the flow rate of the flue gas to a certain extent, increasing The time of flue gas electrostatic precipitator, and then the flue gas back and forth in the airflow channel formed between the anode plate and the cathode plate, greatly increases the time that the flue gas stays in the electric field area, on the one hand, ensuring that the larger dust particles in the flue gas can be adsorbed by the anode plate and the cathode plate, and on the other hand, it can also ensure that the fine particles in the flue gas can be fully condensed and condensed into large particles, and then settled down. While further removing the larger dust particles in the flue gas, it can also remove the fine particles in the flue gas, solve the current problem of a large number of fine particles escaping, and improve the dust removal efficiency and dust removal effect of the smoke. The utility model has stable operation, high dust removal efficiency, ideal dust removal effect, and significant economic value and social value. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the main structure of the utility model;
[0013] Figure 2 It is a schematic diagram of the top view structure of the utility model;
[0014] Figure 3 It is a schematic diagram of the structure of the air baffle 19 in the utility model;
[0015] In the figure: 1-cyclone dust collector, 2-electrostatic precipitator, 3-grate plate, 4-dust removal chamber, 5-ash storage chamber, 6-air inlet, 7-air outlet, 8-ventilation channel, 9-insulating partition, 10-mounting block, 11-anode plate, 12-cathode plate, 13-anti-impact plate, 14-dust arc plate, 15-flange, 16-fixing rod, 17-V-shaped diverter plate, 18-activated carbon layer, 19-air baffle. DETAILED DESCRIPTION
[0016] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the present invention belong to the protection scope of the present invention.
[0017] like Figures 1 to 3 As shown, the utility model comprises a cyclone dust collector 1 and an electrostatic precipitator 2 connected in sequence. The cyclone dust collector 1 is an existing dry high temperature resistant dust removal equipment, which can remove large particles of dust in the flue gas. The internal space of the electrostatic precipitator 2 is divided into a dust removal chamber 4 and an ash storage chamber 5 by a grate plate 3. The grate plate 3 is an existing structure, and a gap is provided on the grate plate 3. After the dust separated in the dust removal chamber 4 sinks, it passes through the gap of the grate plate 3 and falls into the ash storage chamber 5 for storage, and can be cleaned regularly. The middle parts of the two opposite side walls of the dust removal chamber 4 are respectively provided with an air inlet 6 and an air outlet 7. An air baffle 19 is provided in the dust removal chamber 4 near the air inlet 6. Both sides of the air baffle 19 are connected to the dust removal chamber 4. A ventilation channel 8 is left between the side walls of the dust chamber 4, and an insulating partition 9 is arranged in the middle of the side of the air baffle 19 facing the air outlet 7. Dust removal mechanisms are symmetrically arranged on both sides of the insulating partition 9, and each dust removal mechanism includes a plurality of mounting blocks 10 arranged at staggered intervals. Anode plates 11 and cathode plates 12 are alternately installed on the plurality of mounting blocks 10 in sequence. The anode plates 11 and the cathode plates 12 are arranged parallel to each other. The structure of the anode plates 11 and the cathode plates 12 is the existing technology, and a bipolar discharge structure is adopted to fully absorb larger dust particles in the flue gas. At the same time, fine particles with different charges will collide with each other, condense into large particles, and then settle down.
[0018] When the utility model is in operation, the cyclone dust collector 1 is first used to remove large particles of dust in the flue gas, and then the flue gas is passed into the electrostatic precipitator 2, and the flue gas rushes toward the air baffle 19 from the air inlet 6, and some of the particle dust therein hits the air baffle 19 and is separated from the flue gas. Subsequently, the flue gas flows into the dust removal chamber 4 from the ventilation channels 8 on both sides of the air baffle 19, and is deflected back and forth along the air flow channel formed between the anode plate 11 and the cathode plate 12 in the dust removal chamber 4, and is discharged from the air outlet 7 after passing through the electrostatic precipitator. In the above process, the cyclone dust collector 1 and the electrostatic precipitator 2 are combined to remove the dust in the smoke. Compared with the bag dust removal and spray dust removal methods, there is no need to frequently replace the filter bags, which ensures that the entire dust removal system can operate stably and continuously for a long time, improves the dust removal efficiency, and does not consume water resources, thereby reducing the operating cost; secondly, when the electrostatic precipitator is processed, on the one hand, part of the large particles of dust are further removed through the collision between the flue gas and the air baffle 19, thereby reducing the load of the subsequent electrostatic precipitator; on the other hand, the flue gas is diverted by the air baffle 19, thereby reducing the flow rate of the flue gas to a certain extent, thereby increasing the flue gas flow rate. The time of gas electrostatic precipitator, and then the flue gas is deflected back and forth in the air flow channel formed between the anode plate 11 and the cathode plate 12, which greatly increases the time that the flue gas stays in the electric field area. On the one hand, it ensures that the larger particles of dust in the flue gas can be adsorbed by the anode plate 11 and the cathode plate 12, and on the other hand, it can also ensure that the fine particles in the flue gas can be fully condensed and condensed into large particles, and then settled down. While further removing the larger particles of dust in the flue gas, it can also remove the fine particles in the flue gas, solve the current problem of a large number of fine particles escaping, and improve the dust removal efficiency and dust removal effect of the smoke.
[0019] A bumper plate 13 is provided in the middle of the side of the air baffle plate 19 facing the air inlet 6. The flue gas contains a large amount of dust, and the temperature of the flue gas itself is relatively high. The air baffle plate 19 is impacted by the flue gas for a long time, which will cause great loss, and may even be punctured in severe cases. In order to prevent this from happening, a bumper plate 13 is provided. The bumper plate 13 is used to withstand the impact of the flue gas. When the bumper plate 13 is damaged, only the bumper plate 13 needs to be replaced, and there is no need to replace the entire air baffle plate 19, which can save maintenance time and maintenance costs. At the same time, in order to extend the service life of the bumper plate 13, the bumper plate 13 can be made of high-strength, wear-resistant and impact-resistant material.
[0020] A number of dust shield rings are concentrically arranged on the side of the air shield plate 19 facing the air inlet 6, and each dust shield ring includes a plurality of dust shield arc plates 14 evenly distributed around the circumference. After the flue gas hits the air shield plate 19, it will diffuse around. At this time, the flue gas will hit the dust shield arc plate 14. After the dust particles in the flue gas hit the dust shield arc plate 14, they will be separated from the flue gas, thereby improving the dust removal efficiency of the dust in the flue gas.
[0021] In order to facilitate the dust cleaning, maintenance and disassembly of the electrostatic precipitator 2, a slide groove is vertically processed on the end face of the mounting block 10, and the anode plate 11 and the cathode plate 12 are inserted in the slide groove. The top plate and the side wall of the electrostatic precipitator 2 are connected by a flange 15. When the utility model is in use, as the use time increases, the dust adsorbed on the anode plate 11 and the cathode plate 12 will increase, and it is necessary to clean them regularly. At this time, the flange 15 can be loosened, and the top plate of the electrostatic precipitator 2 can be removed to clean the dust accumulated on the anode plate 11 and the cathode plate 12. If necessary, the anode plate 11 and the cathode plate 12 can also be pulled out. After cleaning or replacing, the anode plate 11 and the cathode plate 12 can be inserted back into the slide groove of the mounting block 10, and the top plate can be covered.
[0022] A fixing rod 16 is arranged between two adjacent anode plates 11 and cathode plates 12, one end of the fixing rod 16 is fixed on the side wall of the electrostatic precipitator 2, and the other end is fixed on the insulating partition 9, and a plurality of V-shaped diverter plates 17 are arranged at intervals on the fixing rod 16. When the flue gas flows in the channel between the anode plate 11 and the cathode plate 12, the flue gas is diverted by the V-shaped diverter plates 17, and the flue gas flows to both sides to form two streams, one stream flows to the anode plate 11, and the other stream flows to the cathode plate 12, which can not only promote the adsorption of dust in the flue gas by the anode plate 11 and the cathode plate 12, but also stir the flue gas to prevent the dust from escaping from between the anode plate 11 and the cathode plate 12, and can also change the direction of the flue gas flow, increase the time the flue gas stays in the electric field area, and improve the dust removal efficiency of the flue gas.
[0023] An activated carbon layer 18 is arranged inside the electrostatic precipitator 2 near the air outlet 7. After the flue gas is successively subjected to dust removal treatment by the cyclone dust collector 1 and the electrostatic precipitator 2, the flue gas is adsorbed and filtered by the activated carbon layer 18. On the one hand, it further adsorbs the residual dust in the flue gas, and on the other hand, it can also eliminate odor and bacteria in the flue gas, thereby further purifying the flue gas.
Claims
1. A yellow phosphorus raw material drying flue gas dust removal system based on phosphorus furnace tail gas, comprising a cyclone dust collector (1) and an electrostatic precipitator (2) connected in sequence, characterized in that The internal space of the electrostatic precipitator (2) is divided into a dust removal chamber (4) and an ash storage chamber (5) by a grate plate (3); an air inlet (6) and an air outlet (7) are respectively arranged in the middle of two opposite side walls of the dust removal chamber (4); an air baffle (19) is arranged in the dust removal chamber (4) near the air inlet (6); a ventilation channel (8) is left between the two sides of the air baffle (19) and the side walls of the dust removal chamber (4); an insulating partition (9) is arranged in the middle of the side of the air baffle (19) facing the air outlet (7); dust removal mechanisms are symmetrically arranged on both sides of the insulating partition (9); each dust removal mechanism comprises a plurality of mounting blocks (10) arranged at staggered intervals; anode plates (11) and cathode plates (12) are alternately mounted on the plurality of mounting blocks (10); the anode plates (11) and the cathode plates (12) are arranged parallel to each other.
2. A yellow phosphorus raw material drying flue gas dust removal system based on phosphorus furnace tail gas according to claim 1, characterized in that An anti-collision plate (13) is arranged at the middle of the side of the air baffle plate (19) facing the air inlet (6).
3. A yellow phosphorus raw material drying flue gas dust removal system based on phosphorus furnace tail gas according to claim 1, characterized in that A plurality of dust shielding rings are concentrically arranged on the side of the air shielding plate (19) facing the air inlet (6), and each dust shielding ring includes a plurality of dust shielding arc plates (14) uniformly distributed around the circumference.
4. A yellow phosphorus raw material drying flue gas dust removal system based on phosphorus furnace tail gas according to claim 1, characterized in that A slide groove is vertically processed on the end surface of the mounting block (10), and the anode plate (11) and the cathode plate (12) are inserted into the slide groove. The top plate and the side wall of the electrostatic precipitator (2) are connected via a flange (15).
5. The yellow phosphorus raw material drying flue gas dust removal system based on phosphorus furnace tail gas according to claim 1 is characterized in that A fixing rod (16) is provided between two adjacent anode plates (11) and cathode plates (12), one end of the fixing rod (16) is fixed to the side wall of the electrostatic precipitator (2), and the other end is fixed to the insulating partition (9), and a plurality of V-shaped flow dividers (17) are provided at intervals on the fixing rod (16).
6. The yellow phosphorus raw material drying flue gas dust removal system based on phosphorus furnace tail gas according to claim 1 is characterized in that An activated carbon layer (18) is arranged inside the electrostatic precipitator (2) near the gas outlet (7).