Electrical tar precipitator for phosphoric acid tail gas treatment
By incorporating spiral blades to slow the flow and a conveniently removable guide plate within the dust collection plate, the problems of excessively high exhaust gas velocity and oil accumulation on the guide plate are solved, improving purification efficiency and reducing maintenance difficulty, thus achieving efficient and stable operation of the equipment.
Patent Information
- Application Number
- CN202520040374.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-01-08
AI Technical Summary
In traditional electrostatic precipitators, the excessively high exhaust gas velocity results in insufficient contact time between tar droplets and the dust collection plate, leading to unsatisfactory adsorption effects. Furthermore, the guide plate is prone to accumulating focused oil, affecting equipment operating efficiency and maintenance difficulty.
Spiral blades are installed inside the dust collection plate to slow down the flow rate of the exhaust gas, and a convenient disassembly structure is designed on the guide plate. The guide plate is stabilized and easy to clean by means of pins and L-shaped rods.
It improves exhaust gas purification efficiency, simplifies the cleaning process of the deflector, reduces operating and maintenance costs, and ensures long-term stable operation of the equipment.
Smart Images
Figure CN223811123U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to environmental protection equipment technical field especially for phosphoric acid tail gas treatment's electric tar precipitator. BACKGROUND
[0002] In the production process of phosphoric acid, along with the chemical reaction, a large amount of tail gas containing complex components will be produced. These tail gas is rich in harmful impurity gases such as phosphorus pentoxide, phosphorus trioxide and elemental phosphorus, and is mixed with a large amount of tar mist droplets. If these pollutants are not effectively treated, not only will they cause serious air pollution, but also they may enter the soil and water through sedimentation, leading to soil acidification and water pollution, posing a significant threat to the ecological system and human health. The tail gas treatment efficiency directly affects the environmental compliance and social responsibility fulfillment of phosphoric acid production enterprises.
[0003] The traditional phosphoric acid tail gas treatment usually adopts an electric tar precipitator, whose basic principle is to separate and purify the tar mist droplets and impurity gas particles in the tail gas by using an electric field. When the tail gas enters through the gas inlet at the bottom of the equipment, it first passes through the rectifier and is divided into channels by the guide plate, making the airflow evenly distributed and guiding the tail gas to fully contact with the discharge needle and dust collection plate inside the equipment. The discharge needle releases negative ions, and the dust collection plate releases positive ions, forming a strong electric field. The tar mist droplets and impurity particles in the tail gas are ionized and charged negatively under the action of the electric field, and then are adsorbed by the positively charged dust collection plate. As the tar and impurities accumulate on the dust collection plate, when their mass exceeds the adhesion force, they gradually flow from the surface of the dust collection plate to the bottom for collection under the action of gravity.
[0004] Although the technical principle of the traditional electric tar precipitator is relatively mature, there are still problems in actual application that need to be optimized. First, the flow rate of the tail gas through the dust collection plate is often fast, resulting in insufficient contact time between the tar mist droplets and gas impurities and the dust collection plate, and the adsorption effect is not ideal, affecting the purification efficiency of the tail gas. Second, during the long-term operation of the equipment, a large amount of tar will accumulate on the surface of the guide plate, especially in the areas where the guide plate has no holes. The accumulation of these tars not only hinders the normal flow of the tail gas, but also hinders the smooth flow of the tar. Once the pollution of the guide plate intensifies, not only will it significantly reduce the operating efficiency of the equipment, but also it will increase the difficulty of maintenance and cleaning costs.
[0005] Therefore, an electric tar precipitator for phosphoric acid tail gas treatment is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL
[0006] In order to make up for the above shortcomings, the utility model provides an electric tar precipitator for phosphoric acid tail gas treatment, aiming to improve the problems of fast flow rate of gas in the dust collection plate and easy accumulation of adsorbed tar on the guide plate.
[0007] In order to achieve the above object, the utility model discloses the following technical scheme: the electric tar precipitator for phosphoric acid tail gas treatment, including the processing jar, the processing jar top is fixedly connected with the exhaust pipe, the processing jar is internally provided with adsorption mechanism, the processing jar bottom is fixedly connected with the oil drain pipe, the processing jar outside is fixedly connected with the air inlet pipe, and the processing jar bottom is provided with support assembly,
[0008] The adsorption mechanism includes a dust collection plate, the dust collection plate is fixedly connected inside the processing jar, the dust collection plate is internally provided with a flow buffer assembly, the processing jar is fixedly connected with a discharge needle inside, the processing jar is fixedly connected with a hollow shell inside, the hollow shell is internally inserted with a flow guide plate, and the hollow shell is fixedly connected with more than one recess block outside.
[0009] Further description of the above technical scheme:
[0010] The support assembly includes a plurality of support frames, the support frames are fixedly connected at the bottom of the processing jar, and the support frame bottom is fixedly connected with a tray.
[0011] Further description of the above technical scheme:
[0012] The inner wall of the dust collection plate is fixedly connected with a spiral blade.
[0013] Further description of the above technical scheme:
[0014] The fixed assembly includes a protective shell, the protective shell is fixedly connected inside the recess block outside, the protective shell is fixedly connected with a shell inside, the shell is slidingly connected with a latch inside, the latch is sleeved with a spring outside, the latch is fixedly connected with a backing plate outside, the backing plate is fixedly connected with an L-shaped rod outside, the shell is provided with an L-shaped groove outside, and one end of the protective shell is provided with an arc-shaped groove.
[0015] Further description of the above technical scheme:
[0016] The flow guide plate is fixedly connected with an insertion block outside, the insertion block is slidingly connected inside the recess block, and the latch is inserted inside the insertion block.
[0017] Further description of the above technical scheme:
[0018] One end of the spring is fixedly connected on one side of the backing plate, and the other end of the spring is in abutment with the inner wall of the shell.
[0019] Further description of the above technical scheme:
[0020] The discharge needle is inserted inside the dust collection plate outside, and the processing jar top is fixedly connected with an electrically insulated sub.
[0021] As a further description of the above technical solutions:
[0022] The L-shaped rod is slidably connected outside the L-shaped groove and the arc-shaped groove.
[0023] The utility model has the following beneficial effects:
[0024] 1、 in the utility model, the spiral piece is arranged inside the dust collecting plate, efficient purification of tail gas is realized, when the tail gas enters from the air inlet pipe, first, the flow guide plate guides the flow and enters the inside of the dust collecting plate, under the action of the spiral piece, the tail gas forms slow and sufficient flow in the dust collecting plate, the purification effect is obviously improved, the tail gas is treated more completely.
[0025] 2、 in the utility model, after long time use of the equipment, due to the structural design of the flow guide plate, some adsorbed tar is accumulated on the position without hole of the flow guide plate, on one hand, the entry of the tail gas is affected, the tar outflow is also affected, at the time, the plug can be pulled, then rotated, the L-shaped rod is clamped in the L-shaped groove, then the handle is pulled, the flow guide plate can be taken out, after cleaning is completed, it is inserted into the treatment tank again. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 It is the three-dimensional schematic view of the electric tar precipitator for phosphoric acid tail gas treatment provided by the utility model;
[0027] Figure 2 It is the exploded structural schematic view of the flow guide plate of the electric tar precipitator for phosphoric acid tail gas treatment provided by the utility model;
[0028] Figure 3 It is the enlarged schematic view of A in the figure; Figure 2
[0029] Figure 4 It is the enlarged schematic view of B in the figure; Figure 3
[0030] Figure 5 It is the exploded structural schematic view of the electric tar precipitator for phosphoric acid tail gas treatment provided by the utility model;
[0031] Figure 6 It is the enlarged schematic view of C in the figure. Figure 5
[0032] LEGEND:
[0033] 1, exhaust pipe; 2, electric insulator; 3, hollow shell; 4, air inlet pipe; 5, support frame; 6, processing tank; 7, guide plate; 8, arc groove; 9, shell; 10, spring; 11, plug; 12, pad; 13, recess block; 14, bolt; 15, L-shaped rod; 16, L-shaped groove; 17, protective shell; 18, dust collection plate; 19, discharge needle; 20, spiral blade; 21, oil discharge pipe; 22, tray. DETAILED DESCRIPTION
[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0035] Referring to Figure 1 - Figure 6 An embodiment provided by the utility model: the electric tar precipitator for phosphoric acid tail gas treatment, including processing tank 6, processing tank 6 top fixedly connected with exhaust pipe 1, processing tank 6 inside is provided with adsorption mechanism, processing tank 6 bottom fixedly connected with oil discharge pipe 21, processing tank 6 outside fixedly connected with air inlet pipe 4, processing tank 6 bottom is provided with support assembly;
[0036] The adsorption mechanism includes a dust collection plate 18 fixedly connected inside the treatment tank 6, a discharge needle 19 fixedly connected inside the treatment tank 6, a hollow shell 3 fixedly connected inside the treatment tank 6, a flow guide plate 7 inserted inside the hollow shell 3, and not more than one recessed block 13 fixedly connected outside the hollow shell 3, and the recessed block 13 is provided with a fixed assembly inside. The treatment tank 6 is the main structure of the entire device, which contains the adsorption mechanism and the tail gas treatment device inside, and provides a closed space for the tail gas purification process, guides the flow of tail gas, and carries all components in the purification process, ensuring stable operation of the gas from the inlet to the outlet. The exhaust pipe 1 is used to discharge the purified tail gas, ensuring that the purified tail gas meets the environmental protection standards and is smoothly discharged. The dust collection plate 18 is used to release positive ions and adsorb negatively charged tar mist and impurity particles, separate impurities in the tail gas through the action of an electric field, and make the adsorbed impurities flow to the bottom of the treatment tank 6 under the action of gravity. The discharge needle 19 is used to release negative ions and form a strong electric field with the dust collection plate 18, ionize the tar mist and impurities in the tail gas, and make them carry negative charges, which is convenient for the dust collection plate 18 to adsorb. The hollow shell 3 provides installation space for the flow guide plate 7, and regulates the gas flow path to ensure uniform flow of tail gas to the adsorption mechanism, optimize gas distribution, and improve purification effect. The flow guide plate 7 is used to rectify and channel the tail gas, ensuring uniform flow of gas to the dust collection plate 18, improving the purification efficiency of the device, and reducing the influence of airflow turbulence on the performance of the device. The recessed block 13 is used to install the fixed assembly and cooperate with the flow guide plate 7 to ensure the stability of the flow guide plate 7, and facilitate the disassembly and cleaning of the flow guide plate 7. The oil discharge pipe 21 is used to discharge the tar collected at the bottom of the treatment tank 6, ensuring that the accumulated tar can be discharged in time during the operation of the device to avoid affecting the performance of the device.
[0037] Referring to Figure 1 - Figure 6 The support assembly includes a plurality of support frames 5 fixedly connected to the bottom of the treatment tank 6, and a tray 22 fixedly connected to the bottom of the support frame 5. The tray 22 is used to connect the support frame 5 and cooperate with the support frame 5 to provide support for the entire device, ensuring that the treatment tank 6 remains stable during installation and operation, preventing the device from tilting or vibrating during operation.
[0038] Referring to Figure 6 The inner wall of the dust collection plate 18 is fixedly connected with a helical fin 20. The helical fin 20 is used to slow down the flow rate of the tail gas by guiding the tail gas to flow along a helical path, reducing the flow rate of the gas. The helical path prolongs the residence time of the tail gas in the dust collection plate 18, allowing the tar mist and impurity particles to fully contact the electric field and the dust collection plate 18, significantly improving the purification effect.
[0039] Referring to Figure 3 and Figure 4The fixed assembly includes a protective shell 17 fixedly connected inside the recessed block 13, an outer shell 9 fixedly connected inside the protective shell 17, a plug 14 slidingly connected inside the outer shell 9, a spring 10 sleeved outside the plug 14, a backing plate 12 fixedly connected outside the plug 14, an L-shaped rod 15 fixedly connected outside the backing plate 12, an L-shaped groove 16 formed in the outer shell 9, and an arc-shaped groove 8 formed in one end of the protective shell 17. The protective shell 17 is used to protect the core parts such as the outer shell 9 and the plug 14 inside from the external environment (such as dust, moisture, etc.), to ensure the stability and durability of the fixed assembly. The spring 10 is used to tightly insert the plug 14 inside the plug-in block 11 without external force, so as to realize the fixation of the deflector plate 7. The outer shell 9 is used to bear various components inside. The backing plate 12 is used to fix the L-shaped rod 15 and also to bear the spring 10. The L-shaped groove 16 is used for the sliding of the L-shaped rod 15 and also can make the L-shaped rod 15 clamped inside the L-shaped groove 16 to realize the fixation of the plug 14. The arc-shaped groove 8 is used for the sliding of the L-shaped rod 15.
[0040] With reference to Figure 3 , Figure 4 and Figure 5 , the deflector plate 7 is fixedly connected with the plug-in block 11, the plug-in block 11 is slidingly connected inside the recessed block 13, the plug 14 is inserted into the plug-in block 11, the plug-in block 11 is inserted into the recessed block 13, and the plug 14 is inserted into the plug-in block 11, thereby realizing the fixation of the deflector plate 7.
[0041] With reference to Figure 1 , Figure 2 , Figure 5 and Figure 6 , the discharge needle 19 is inserted into the dust collecting plate 18, the handling tank 6 is fixedly connected with the electric lead insulator 2 at the top, the electric lead insulator 2 is used to isolate the discharge needle 19 from the metal outer shell 9 of the handling tank 6, to ensure the safe operation of the power system of the discharge needle 19, and to avoid current leakage or short circuit.
[0042] Working principle: When processing the phosphoric acid tail gas, the tail gas first enters the device through the inlet pipe 4. After entering, the tail gas passes through the guide plate 7, which functions to regulate and divide the tail gas, allowing the airflow to be evenly distributed and guiding the tail gas into the dust collection plate 18, providing stable flow conditions for subsequent purification steps. In the area of the dust collection plate 18, the discharge needle 19 releases negative ions, while the dust collection plate 18 releases positive ions, together forming a strong electric field inside the device. When the tail gas passes through this electric field, the tar droplets and impurity particles carried in the tail gas are ionized and charged under the action of the electric field. These negatively charged particles are strongly attracted to the positively charged dust collection plate 18, effectively separating and purifying harmful components in the tail gas. As the device runs for a longer period of time, tar and impurities gradually accumulate on the dust collection plate 18. When the mass of the accumulated material exceeds its adhesion, tar will gradually slide off the surface of the dust collection plate 18 and fall to the bottom of the treatment tank 6 due to gravity. The treatment tank 6 is provided with an oil drain pipe 21, which can be used to concentrate and discharge the tar when it accumulates to a certain amount, thereby maintaining the efficiency of the device. However, during long-term operation of the device, tar may accumulate on the guide plate 7. These accumulated tar not only hinders the normal entry of the tail gas, but also affects the smooth discharge of the tar, thereby reducing the efficiency of the device. To solve this problem, the device is specially designed with a convenient guide plate 7 disassembly and cleaning mechanism. When cleaning the guide plate 7, the user only needs to pull the pin 14, at which time the spring 10 will be compressed by the pad 12, causing the pin 14 to move along the sliding track. When the pin 14 slides to a certain position, the user can rotate the pin 14 to make the L-shaped rod 15 snap into the L-shaped slot 16, thereby fixing the pin 14 and avoiding the need to manually hold the pin 14 for a long time during disassembly. Then, the user can easily pull out the guide plate 7 for cleaning and maintenance. After cleaning, the user follows the reverse steps to reinsert the guide plate 7 into the hollow shell 3, and then rotates the pin 14 to disengage the L-shaped rod 15 from the L-shaped slot 16. Under the action of the spring 10, the pin 14 will automatically return to its original position and be inserted into the plug 11, thereby firmly fixing the guide plate 7. This design not only greatly simplifies the cleaning process, but also ensures the stability of the guide plate 7 and the long-term stable operation of the device. Through the optimized tail gas treatment process and convenient maintenance design, the device effectively improves the efficiency of tail gas purification, while reducing the operating and maintenance costs, providing an efficient and reliable solution for the environmental protection treatment of phosphoric acid production tail gas.
[0043] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.
Claims
1. An electrostatic precipitator for phosphoric acid tail gas treatment comprising a treatment tank (6), characterized in that: The processing tank (6) top fixedly connected with exhaust pipe (1), the processing tank (6) inside is provided with adsorption mechanism, the processing tank (6) bottom fixedly connected with oil drain pipe (21), the processing tank (6) outside fixedly connected with air inlet pipe (4), the processing tank (6) bottom is provided with support assembly; The adsorption mechanism includes dust collection plate (18), the dust collection plate (18) is fixedly connected in the processing tank (6), the processing tank (6) is fixedly connected with discharge needle (19), the processing tank (6) is fixedly connected with hollow shell (3), the hollow shell (3) is inserted with guide plate (7), the hollow shell (3) outside is fixedly connected with more than one recess block (13), the recess block (13) is provided with fixed assembly.
2. The electrostatic precipitator for phosphoric acid tail gas treatment as claimed in claim 1 wherein: The support assembly includes a plurality of support frames (5), the support frame (5) is fixedly connected in the processing tank (6) bottom, the support frame (5) bottom fixedly connected with tray (22).
3. The electrostatic precipitator for phosphoric acid tail gas treatment as claimed in claim 1 wherein: The inner wall of the dust collection plate (18) is fixedly connected with helical blade (20).
4. The electrostatic precipitator for phosphoric acid tail gas treatment as claimed in claim 1 wherein: The fixed assembly includes protective shell (17), the protective shell (17) outside is fixedly connected in the recess block (13), the protective shell (17) inside is fixedly connected with shell (9), the shell (9) inside is slidingly connected with latch (14), the latch (14) outside is sleeved with spring (10), the latch (14) outside is fixedly connected with backing plate (12), the backing plate (12) outside is fixedly connected with L-shaped rod (15), the shell (9) outside is provided with L-shaped slot (16), one end of the protective shell (17) is provided with arc slot (8).
5. The electrostatic precipitator for phosphoric acid tail gas treatment as claimed in claim 4 wherein: The guide plate (7) outside is fixedly connected with plug (11), the plug (11) is slidingly connected in the recess block (13), the latch (14) is inserted in the plug (11) inside.
6. The electrostatic precipitator for phosphoric acid tail gas treatment as claimed in claim 4 wherein: One end of the spring (10) is fixedly connected on one side of the backing plate (12), the other end of the spring (10) is abutted with the inner wall of the shell (9).
7. The electrostatic precipitator for phosphoric acid tail gas treatment as claimed in claim 1 wherein: The discharge needle (19) outside is inserted in the dust collection plate (18) inside, the processing tank (6) top fixedly connected with electrically insulated sub (2).
8. The electrostatic precipitator for phosphoric acid tail gas treatment as claimed in claim 4 wherein: The L-shaped rod (15) outside is slidingly connected in the L-shaped slot (16) and arc slot (8) inside.