A carbon black production high temperature air preheater anti-coal guide pipe device

Abstract

The present invention discloses a carbon black production high-temperature air preheater anti-coal hanging guide pipe device, the guide pipe device includes: an outer guide pipe, an inner guide pipe, a plurality of adjustment rods, a guide rubber plate and a control module, the inner guide pipe is sleeved on the inner pipe wall of the outer guide pipe with a gap, and its two ends are welded and fixed to the two ends of the outer guide pipe, and the pipe wall of the inner guide pipe is provided with a plurality of strip-shaped through holes; the control module adjusts the shape of the guide member to adjust the incoming flue gas of the inner guide pipe. The present invention provides an adjustment rod and a guide rubber plate that are easy to adjust by using an inner and outer outer joint form of the guide pipe, and adjusts the guide shape of the guide rubber plate by adjusting the rotation angle of the adjustment rod; and also provides a control strategy that can adaptively adjust the guide shape of the guide rubber plate when the temperature and flow rate of the incoming flue gas change, thereby obtaining a higher heat exchange efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of air preheaters, and in particular relates to a carbon black production high-temperature air preheater anti-coal hanging guide pipe device. Background Art

[0002] Air preheater is one of the key equipment in the carbon black production process.

[0003] The air preheater adopts a countercurrent design for the heat absorption and release media, thereby obtaining a higher heat transfer driving force, transferring the heat of the flue gas to the intake air, lowering the flue gas temperature, reducing the amount of quenching water used, and increasing the calorific value of the carbon black tail gas; after the air absorbs heat, the thermal enthalpy is increased, and under the same process conditions, the amount of fuel oil used in the reactor is reduced, thereby reducing energy consumption.

[0004] As air preheaters operate longer, heat exchange tube blockage becomes more common, causing increased furnace pressure and disrupting normal production. Blockages are most common in the heat exchange tubes near the flue gas inlet. This is due to the high concentration of carbon black particles in the flue gas, which increases the chance of carbon black particles colliding with the heat exchange tube walls. Furthermore, residual solvent extracts on the carbon black surface create a strong adhesion, leading to some carbon black particles adhering to the tube walls during transport. Over time, this can lead to blockages.

[0005] Therefore, how to improve the heat exchange effect of the air preheater or reduce the frequency of pipe blockage to ensure the stable operation of the preheater has become an important research topic. Summary of the Invention

[0006] In view of the many deficiencies of the air preheater in the prior art, a carbon black production high-temperature air preheater anti-coal hanging guide pipe device is provided.

[0007] A carbon black production high-temperature air preheater anti-coal hanging guide pipe device, the guide pipe device comprising:

[0008] diversion outer tube;

[0009] The inner flow guide tube is sleeved on the inner wall of the outer flow guide tube with a gap, and its two ends are welded and fixed to the two ends of the outer flow guide tube. The wall of the inner flow guide tube is provided with a plurality of strip-shaped through holes;

[0010] A plurality of adjusting rods passing through the strip-shaped through holes of the inner flow guide tube and rotatably arranged on the inner wall surface of the outer flow guide tube;

[0011] A guide rubber plate is fixed on the adjusting rod;

[0012] a control module, wherein the control module adjusts the shape of the guide member to adjust the incoming flue gas of the guide inner pipe;

[0013] The control module includes a sensor module, a strategy module and a regulation module. The sensor module can detect the flow rate and temperature of the incoming smoke from the inner guide tube and import them into the strategy module.

[0014] The strategy module controls the adjustment module to rotate the adjustment rod according to the flow rate and temperature of the incoming flue gas, thereby adjusting the shape of the guide rubber plate;

[0015] The control strategy of the strategy module includes an initialization process and a control process:

[0016] The initialization process is as follows:

[0017] Step SA1: preprocessing the flow rate and temperature of the incoming flue gas;

[0018] Step SA2: performing data splicing on the processed flow rate and temperature to obtain connection feature data;

[0019] Step SA3: Setting a minimum rotation angle and an adjustment sequence for the adjustment rod, rotating and adjusting the adjustment rod in sequence according to the minimum rotation angle in the adjustment sequence and recording the number of adjustments, setting a single detection time, obtaining the heat exchange efficiency of the air preheater for each rotation adjustment within the single detection time, obtaining the optimal heat exchange efficiency of the air preheater and the number of adjustments corresponding to each adjustment rod, and obtaining the adjustment angle of each adjustment rod corresponding to the optimal heat exchange efficiency of the air preheater through numerical calculation;

[0020] Step SA4: Adjust the flow rate and temperature of the incoming flue gas, repeat steps SA1 to SA3, obtain the adjustment angle of each adjustment rod corresponding to the optimal heat exchange efficiency of the air preheater for different flow rates and temperatures of the incoming flue gas, splice the data in an array form, and store the data to form stored data;

[0021] The specific control process is:

[0022] Step SB1: performing data preprocessing on the flow rate and temperature of the incoming flue gas;

[0023] Step SB2: performing data splicing on the processed flow rate and temperature to obtain connection feature data;

[0024] Step SB3: traversing the connection characteristic data obtained in step SB2 in the stored data to obtain the adjustment angle of each adjustment rod corresponding to the optimal heat exchange efficiency of the air preheater;

[0025] Step SB4: Control the adjustment module to rotate and adjust the adjustment rod according to the adjustment angle obtained in step SB3.

[0026] Furthermore, the guide rubber plate is an arc strip plate, and the guide rubber plate is provided with a plurality of mounting holes, and the mounting holes face the inner wall surface of the guide inner tube and are fixedly docked with the adjustment rod.

[0027] Furthermore, the adjusting rod includes an adjusting long rod and an adjusting short rod. The adjusting long rods are arranged at equal intervals, and the adjusting short rod is inserted between every two adjusting long rods. The mounting holes at both ends of the guide rubber plate are connected to the two adjusting long rods, and the hole depth of the mounting hole is adapted to the length of the adjusting rod.

[0028] Furthermore, through holes are provided at the top end of the adjusting rod and the side of the guide rubber plate, and screws and nuts are provided through the through holes.

[0029] Furthermore, the inner flow guide tube is divided into two sections, namely a first inner flow guide tube and a second inner flow guide tube, and the first inner flow guide tube and the second inner flow guide tube are rotatably sleeved together.

[0030] Furthermore, the first flow-guiding inner tube is fitted with the second flow-guiding inner tube, a sliding groove is provided on the fitting portion of the first flow-guiding inner tube, and a slider or a sliding ball is provided on the second flow-guiding inner tube which can slide in the sliding groove.

[0031] Furthermore, the upper end of the guide inner tube of the guide tube is connected to the heat exchange tube of the high-temperature air preheater.

[0032] Furthermore, the heat exchange tube is provided with a protective sleeve arranged around it, and the protective sleeve is clamped in the sleeve plate of the high-temperature air preheater.

[0033] Furthermore, the lower end of the guide tube is provided with a flare, and the upper part of the flare of the guide tube is cast with mullite castable around the guide tube, and the guide tube is fixedly connected to the mullite castable by bolts.

[0034] Furthermore, a lightweight high-aluminum thermal insulation castable is cast between the mullite castable and the tube sheet.

[0035] The positive progress effect of the present invention is:

[0036] 1) This invention utilizes an inner-outer-outer coupling to provide a conveniently adjustable adjustment rod and rubber guide plate. Adjusting the rotation angle of the adjustment rod adjusts the guide plate's flow shape. Furthermore, this invention provides a control strategy that adaptively adjusts the guide plate's flow shape to achieve higher heat exchange efficiency as the incoming flue gas temperature and flow rate change.

[0037] 2) The present invention can further adjust the shape of the guide rubber plate by providing adjustment rods of different lengths, so that there is more adjustment space in the longitudinal direction to provide a richer guide shape.

[0038] 3) The draft tube of the present invention increases the swirl degree of the inlet flue gas, reduces the disordered collision between the carbon black and the heat exchange tube wall, and reduces the blockage probability of the heat exchange tube, thereby ensuring the stable operation of the equipment.

[0039] 4) By designing and arranging the guide pipe, the distance the flue gas travels in the heat exchange tube is increased, the heat exchange time between the cold medium and the hot medium is increased, the heat exchange efficiency is improved, the temperature of the air entering the furnace is increased, and energy consumption is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0041] Figure 2 It is a structural schematic diagram of the flow guide tube of the present invention;

[0042] Figure 3 It is a partial structural cross-sectional view of the flow guide tube device of the present invention;

[0043] Figure 4 This is a schematic structural diagram of the outer tube of the flow guide pipe and the adjustment rod of the present invention;

[0044] Figure 5 This is a system structure diagram of the control module of the present invention. DETAILED DESCRIPTION

[0045] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0046] refer to Figures 1 to 5 A carbon black production high-temperature air preheater anti-coal hanging guide pipe device, in one example, the guide pipe device includes:

[0047] Diversion outer tube 11;

[0048] The inner flow guide tube 12 is sleeved on the inner wall of the outer flow guide tube 11 with a gap, and its two ends are welded to the two ends of the outer flow guide tube 12. The wall of the inner flow guide tube 11 is provided with a plurality of strip-shaped through holes.

[0049] A plurality of adjusting rods 13 are rotatably arranged on the inner wall surface of the guide tube through the strip-shaped through holes of the guide tube inner tube;

[0050] The guide rubber plate 14 is fixed on the adjustment rod;

[0051] A control module, wherein the control module adjusts the shape of the guide member to adjust the incoming flue gas of the guide inner pipe;

[0052] The control module includes a sensor module, a strategy module and a regulation module. The sensor module can detect the flow rate and temperature of the incoming flue gas from the inner guide pipe and import them into the strategy module.

[0053] The strategy module controls the adjustment module to rotate the adjustment rod according to the flow rate and temperature of the imported incoming flue gas, thereby adjusting the shape of the guide rubber plate;

[0054] In one example, the control strategy of the strategy module includes an initialization process and a control process:

[0055] The initialization process is as follows:

[0056] Step SA1: preprocessing the flow rate and temperature of the incoming flue gas;

[0057] Step SA2: performing data splicing on the processed flow rate and temperature to obtain connection feature data;

[0058] Step SA3: Setting a minimum rotation angle and an adjustment sequence for the adjustment rod, rotating and adjusting the adjustment rod in sequence according to the minimum rotation angle in the adjustment sequence and recording the number of adjustments, setting a single detection time, obtaining the heat exchange efficiency of the air preheater for each rotation adjustment within the single detection time, obtaining the optimal heat exchange efficiency of the air preheater and the number of adjustments corresponding to each adjustment rod, and obtaining the adjustment angle of each adjustment rod corresponding to the optimal heat exchange efficiency of the air preheater through numerical calculation;

[0059] Step SA4: Adjust the flow rate and temperature of the incoming flue gas, repeat steps SA1 to SA3, obtain the adjustment angle of each adjustment rod corresponding to the optimal heat exchange efficiency of the air preheater for different flow rates and temperatures of the incoming flue gas, splice the data in an array form, and store the data to form stored data;

[0060] The specific control process is:

[0061] Step SB1: performing data preprocessing on the flow rate and temperature of the incoming flue gas;

[0062] Step SB2: performing data splicing on the processed flow rate and temperature to obtain connection feature data;

[0063] Step SB3: traversing the connection characteristic data obtained in step SB2 in the stored data to obtain the adjustment angle of each adjustment rod corresponding to the optimal heat exchange efficiency of the air preheater;

[0064] Step SB4: Control the adjustment module to rotate and adjust the adjustment rod according to the adjustment angle obtained in step SB3.

[0065] The sensor module can use the existing sensor collection means to collect the temperature and flow rate of the incoming smoke, which will not be described here. The adjustment module (not shown) can be a combination of a motor and a transmission shaft, wherein the motor is electrically connected to the aforementioned strategy module, and the transmission shaft is electrically connected to the strategy module. Figure 3 The rotation center of the adjusting rod is connected, and the motor drives the transmission shaft to rotate, thereby driving the adjusting rod to rotate. Of course, other devices that can drive the adjusting rod 13 to rotate and adjust in the gap between the outer guide tube 11 and the inner guide tube 12 can also be used, which will not be repeated here.

[0066] Furthermore, in one example, the guide rubber plate 14 is an arc plate or other shape that is conducive to diversion. The guide rubber plate 14 is provided with a plurality of mounting holes, which face the inner wall surface of the guide inner tube 12 and are fixedly docked with the adjustment rod 13 .

[0067] Furthermore, the adjusting rod 13 includes an adjusting long rod 131 and an adjusting short rod 132. The adjusting long rods 131 are arranged at equal intervals, and an adjusting short rod 132 is inserted between every two adjusting long rods 131. The mounting holes at both ends of the guide rubber plate 14 are connected to the two adjusting long rods, and the depth of the mounting holes is adapted to the length of the adjusting rods.

[0068] By arranging adjustment rods of different lengths, the shape of the guide rubber plate can be further adjusted, so that there is more adjustment space in the longitudinal direction to provide a richer guide shape.

[0069] Furthermore, a through hole 15 is provided at the top of the adjusting rod and the side of the guide rubber plate, and screws and nuts are provided through the through hole 15 to further fix the adjusting rod to the guide rubber plate and improve the stability of the guide.

[0070] If the maximum adjustment angle of the adjustment rod is less than the adjustment angle corresponding to the optimal heat exchange efficiency of the air preheater.

[0071] Furthermore, in one example (not shown), the inner flow guide tube 13 is comprised of two sections: a first inner flow guide tube and a second inner flow guide tube, which are rotatably coupled together. By radially rotating the first and second inner flow guide tubes apart, the adjustment angle of the adjustment rod is compensated, thereby allowing the guide rubber plate 14 to assume the optimal flow-guiding shape.

[0072] Furthermore, as an example, the first inner flow guide tube and the second inner flow guide tube are fitted together, with the first inner flow guide tube having a slide groove at the fitting point, and the second inner flow guide tube having a slider or a bead that can slide within the slide groove. Of course, since the heat exchange tube 2 is docked with the upper end of the flow guide tube 12 (see subsequent description), in this example, the upper inner flow guide tube should be docked with the heat exchange tube 2, that is, maintained in a fixed state, while the lower second inner flow guide tube should be radially rotatable, that is, separated from the lower end of the outer flow guide tube 11. Preferably, the adjustment module of the control module can adjust the rotation angle of the second inner flow guide tube.

[0073] Furthermore, the upper end of the guide inner tube 12 of the guide tube 1 is connected to the heat exchange tube 2 of the high-temperature air preheater.

[0074] Furthermore, the heat exchange tube 2 is provided with a protective sleeve 4 arranged around it, and the protective sleeve 4 is clamped in the sleeve plate 3 of the high-temperature air preheater.

[0075] Furthermore, a flare 121 is provided at the lower end of the flow guide tube 12 , and mullite castable material 6 is cast around the upper portion of the flare 121 of the flow guide tube 12 . The flow guide tube 12 and the mullite castable material 6 are fixedly connected by bolts 122 .

[0076] Furthermore, a lightweight high-aluminum thermal insulation castable 5 is cast between the mullite castable 6 and the tube sheet 3 .

[0077] Working principle: The incoming flue gas flows in the flue gas duct, passes through the flared opening 121 of the guide tube 1 and enters the inner tube 12 of the guide tube, and then passes through the guide rubber plate 14 whose shape is adjusted by the strategy module, thereby increasing the degree of swirl of the flue gas. After that, the flue gas enters the heat exchange tube 2 through the upper part of the guide tube 1. The flue gas contacts the heat exchange tube 2, and the heat exchange tube 2 heats up and exchanges heat with the air, thereby increasing the temperature of the air entering the furnace. In this process, the guide tube made of silicon carbide is not easily affected by temperature differences and corrosive gases in the flue gas, and operates more stably. The guide rubber plate 14 in the guide tube 1 can increase the degree of swirl of the flue gas, reduce the disordered collision of carbon black in the flue gas with the heat exchange tube, and reduce the probability of blockage. At the same time, the flue gas transportation distance is increased, which is conducive to increasing the heat exchange efficiency, increasing the temperature of the air entering the furnace, and reducing energy consumption.

[0078] The present invention has been described in detail above with reference to the embodiments of the accompanying drawings. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined by the appended claims.

Claims

1. A carbon black production high temperature air preheater anti-coal hanging guide pipe device, characterized in that: The flow guide tube device comprises: diversion outer tube; The inner flow guide tube is sleeved on the inner wall of the outer flow guide tube with a gap, and its two ends are welded and fixed to the two ends of the outer flow guide tube. The wall of the inner flow guide tube is provided with a plurality of strip-shaped through holes; The inner flow guide tube is divided into two sections, namely a first inner flow guide tube and a second inner flow guide tube, and the first inner flow guide tube and the second inner flow guide tube are rotatably sleeved together; A plurality of adjusting rods passing through the strip-shaped through holes of the inner flow guide tube and rotatably arranged on the inner wall surface of the outer flow guide tube; The adjustment rod includes a long adjustment rod and a short adjustment rod. The long adjustment rods are arranged at equal intervals, and the short adjustment rod is inserted between every two long adjustment rods. The mounting holes at both ends of the guide rubber plate are connected to the two long adjustment rods, and the hole depth of the mounting hole is adapted to the length of the adjustment rod; A guide rubber plate is fixed on the adjusting rod; a control module, wherein the control module adjusts the shape of the flow guide to adjust the incoming flue gas of the flow guide inner pipe; The control module includes a sensor module, a strategy module and a regulation module. The sensor module can detect the flow rate and temperature of the incoming smoke from the inner guide tube and import them into the strategy module. The strategy module controls the adjustment module to rotate the adjustment rod according to the flow rate and temperature of the incoming flue gas, thereby adjusting the shape of the guide rubber plate; The control strategy of the strategy module includes an initialization process and a control process: The initialization process is as follows: Step SA1: preprocessing the flow rate and temperature of the incoming flue gas; Step SA2: performing data splicing on the processed flow rate and temperature to obtain connection feature data; Step SA3: Setting a minimum rotation angle and an adjustment sequence for the adjustment rod, rotating and adjusting the adjustment rod in sequence according to the minimum rotation angle in the adjustment sequence and recording the number of adjustments, setting a single detection time, obtaining the heat exchange efficiency of the air preheater for each rotation adjustment within the single detection time, obtaining the optimal heat exchange efficiency of the air preheater and the number of adjustments corresponding to each adjustment rod, and obtaining the adjustment angle of each adjustment rod corresponding to the optimal heat exchange efficiency of the air preheater through numerical calculation; Step SA4: Adjust the flow rate and temperature of the incoming flue gas, repeat steps SA1 to SA3, obtain the adjustment angle of each adjustment lever corresponding to the optimal heat exchange efficiency of the air preheater for different flow rates and temperatures of the incoming flue gas, splice the data in an array form, and store the data to form stored data; The specific control process is: Step SB1: performing data preprocessing on the flow rate and temperature of the incoming flue gas; Step SB2: performing data splicing on the processed flow rate and temperature to obtain connection feature data; Step SB3: traversing the connection characteristic data obtained in step SB2 in the stored data to obtain the adjustment angle of each adjustment rod corresponding to the optimal heat exchange efficiency of the air preheater; Step SB4: Control the adjustment module to rotate and adjust the adjustment rod according to the adjustment angle obtained in step SB3.

2. The carbon black production high temperature air preheater anti-coal hanging guide pipe device according to claim 1, characterized in that: The guide rubber plate is an arc strip plate, and is provided with a plurality of mounting holes. The mounting holes face the inner wall surface of the guide inner tube and are fixedly connected to the adjustment rod.

3. The carbon black production high temperature air preheater anti-coal hanging guide pipe device according to claim 2, characterized in that: Through holes are provided at the top end of the adjusting rod and the side of the guide rubber plate, and screws and nuts are provided through the through holes.

4. The carbon black production high temperature air preheater anti-coal hanging guide pipe device according to claim 1, characterized in that: The first flow guiding inner tube is fitted with the second flow guiding inner tube. The first flow guiding inner tube is provided with a sliding groove at the fitting portion. The second flow guiding inner tube is provided with a slider or a sliding ball that can slide in the sliding groove.

5. The carbon black production high temperature air preheater anti-coal hanging guide pipe device according to claim 1, characterized in that: The upper end of the guide inner tube of the guide tube is connected to the heat exchange tube of the high-temperature air preheater.

6. The carbon black production high temperature air preheater anti-coal hanging guide pipe device according to claim 5, characterized in that: The heat exchange tube is provided with a protective sleeve arranged around the tube, and the protective sleeve is clamped in the sleeve plate of the high-temperature air preheater.

7. The carbon black production high temperature air preheater anti-coal hanging guide pipe device according to claim 6, characterized in that: The lower end of the guide tube is provided with a flared opening, and the upper part of the flared opening of the guide tube is cast with mullite castable around the guide tube. The guide tube is fixedly connected to the mullite castable by bolts.

8. The carbon black production high temperature air preheater anti-coal hanging guide pipe device according to claim 7, characterized in that: Lightweight high-aluminum thermal insulation castable is poured between the mullite castable and the sleeve plate.

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