Combustion improver adding pipe group of petroleum coke reaction circulating air inlet system in calcining furnace

Abstract

The utility model discloses a combustion improver adding pipe group of a petroleum coke reaction circulating air inlet system in a calcining furnace, and mainly relates to carbon production. Comprising a jet device assembly and a connecting pipeline connected with a jet device pipeline. The jet device assembly comprises a jet device pipeline, an air inlet formed in one end of the jet device pipeline, a nozzle arranged at the air inlet and a combustion improver adding opening communicated with the outer wall of the jet device pipeline; a flow speed control device is arranged in the nozzle, a suction chamber is arranged between the nozzle and the combustion improver adding port, and a reducing section is arranged between the suction chamber and the connecting pipeline. The device has the beneficial effects that the air inlet amount is controlled according to the calcining temperatures required by the calcining furnaces with different purposes, the calcining conditions of a plurality of calcining furnaces in a calcining workshop can be met at the same time, and a combustion improver can be added according to different calcining stages, so that the combustion improver is combined with added gas, and the combustion efficiency is improved. And after the petroleum coke enters the furnace body, the temperature in the furnace body is rapidly increased, and the conductivity of the broken petroleum coke is further improved.

Description

Technical Field

[0001] The utility model relates to the field of carbon production, in particular to a combustion-supporting agent adding pipe group of a petroleum coke reaction circulation air intake system in a calcining furnace. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] In the electrolytic aluminum industry, carbon blocks are usually used as anodes. Anode carbon blocks are made of petroleum coke as aggregate and coal tar as binder, and are used as anode materials for pre-baked aluminum electrolytic cells. In the process of producing anode carbon blocks, the raw petroleum coke is first calcined. Calcination is a pretreatment process for carbon production. During the calcination process, petroleum coke will undergo a series of significant changes from elemental composition to organizational structure. Because petroleum coke contains volatiles, it needs to be calcined to remove moisture and volatiles from the raw materials, so that the volume of the carbon raw materials can be fully shrunk and its thermal stability and physical and chemical properties can be improved. During calcination, the molecular structure changes continuously with the discharge of volatiles, and the volume of the raw materials themselves gradually shrinks, thereby increasing the density and mechanical strength of the raw materials and reducing the resistivity of the calcined petroleum coke. If the volatiles of the raw materials are too high, the petroleum coke will shrink too much during the subsequent roasting process, resulting in structural deformation, and ultimately making the anode carbon blocks very easy to break after forming, so it is necessary to discharge the volatiles in the raw materials. During calcination, the calcination temperature affects the conductivity of the calcined petroleum coke product. Calcination causes the molecular structure of the petroleum coke to change continuously, and the volatile matter to escape continuously, making the resistivity of the petroleum coke the lowest. As the calcination temperature increases, the impurities contained in the carbon raw materials are gradually eliminated, reducing the chemical activity of the raw materials, thereby improving the conductivity of the raw materials.

[0004] The existing calcined petroleum coke production method generally calcines petroleum coke in a calcining furnace. Most of the existing calcining furnaces control the calcination temperature in the furnace by the oxygen intake at the air inlet. When heating, the air inlet gates on the outside of the calcining furnace body need to be manually opened, and air enters the calcining furnace through the air inlet, so that the oxygen intake in the calcining furnace is rapidly increased. However, in this method, during the heating stage of calcining petroleum coke, all the air inlet gates need to be opened, and the oxygen content in the furnace body is increased by natural wind, which makes the heating of the furnace body slow. Therefore, the oxygen content in the furnace body can only be increased by multiple air inlets on each furnace body to achieve the effect of combustion-supporting. However, when calcining petroleum coke, dozens of furnace bodies are generally used for calcination at the same time, and each furnace body has three air inlets. When heating, the air inlet gates on each furnace body need to be fully opened. Manual control is labor-intensive and the temperature increase effect is slow. When the furnace body is heated, since the air inlet is natural wind, there is a large temperature difference between the natural wind and the inside and outside of the furnace body. The large temperature difference between the inside and outside of the furnace body will cause frequent thermal expansion and contraction of the calcining furnace body wall, and eventually cause the outer wall of the calcining furnace to crack, which directly shortens the life of the furnace body and increases the cost investment of the factory.

[0005] In order to reduce the impact of multiple air inlets on the furnace body on the life of the furnace body, the following improvements are made: the multiple air inlets on each furnace body are reduced to a single one. After the air inlet on the furnace body is improved to a single one, in order to meet the temperature requirements of different calcination stages of petroleum coke, it is necessary to add combustion aids to the furnace body. However, when adding combustion aids, due to the high temperature of the furnace body, it cannot be added to the inside of the furnace body when adding to the furnace body. In addition, there are many furnace bodies in the calcination workshop, and the calcination temperature requirements in different furnace bodies are different. The time for adding combustion aids to furnace bodies that cannot meet the same production requirements is the same, which will cause the same batch of calcined petroleum coke to have slightly different quality. In addition, it is necessary to keep warm at 1000°C during the calcination process, so it is necessary to continuously add combustion aids during the insulation to increase the temperature in the furnace body. It is difficult to add combustion aids in real time, in an appropriate amount, and continuously by manual means, so it is necessary to add combustion aids according to the calcination temperature requirements inside the furnace body. Moreover, it is necessary to add combustion aids according to the temperature of the calcination reaction process of different furnace bodies. The type and amount of combustion aids required to be added are different at different temperatures. The above are problems that need to be solved urgently. Utility Model Content

[0006] The purpose of the utility model is to provide a combustion-supporting agent adding pipe group of the petroleum coke reaction cycle air intake system in the calcining furnace, which can be used to control the air intake according to the calcining temperature required by the calcining furnaces for different purposes, can simultaneously meet the calcining conditions of multiple calcining furnaces in the calcining workshop, and can add combustion-supporting agent according to different calcining stages, so that the combustion-supporting agent is combined with the added gas, and after entering the furnace body, the temperature in the furnace body is quickly increased, and the conductivity of the petroleum coke after the break is further improved. The tar in the connecting pipeline can be discharged without affecting the addition of the combustion-supporting agent.

[0007] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0008] An combustion-aid adding pipe group of the petroleum coke reaction circulation air intake system in a calcining furnace, an ejector assembly, and a connecting pipeline connected to the ejector pipeline; the ejector assembly includes an ejector pipeline, an air inlet arranged at one end of the ejector pipeline, a nozzle arranged at the air inlet, and a combustion-aid adding port connected to the outer wall of the ejector pipeline; a flow rate control device is provided in the nozzle, a suction chamber is provided between the nozzle and the combustion-aid adding port, and a tapered section is provided between the suction chamber and the connecting pipeline; the connecting pipeline and the nozzle are both located in the furnace body, a pressure diffuser section is provided in the connecting pipeline, and the cross-section of the pressure diffuser section is larger than that of the tapered section.

[0009] The connecting pipeline is arc-shaped, an oil drain groove is arranged in the connecting pipeline, a limiting cylinder and an oil baffle plate connected to the outside of the limiting cylinder are arranged outside the oil drain groove.

[0010] The length of the connecting pipeline is 400-800 mm, the cross-sectional diameter of the tapered section of the connecting pipeline is 40-100 mm, and a flow diversion guide is provided in the connecting pipeline, and the flow diversion guide can divert the fluid in the connecting pipeline.

[0011] The diverter guide comprises a diverter ball, a fixed shaft connected to the diverter ball, a diverter pipe opening arranged outside the connecting pipeline, and a diverter plate arranged at the diverter pipe opening. The fixed shaft cooperates with the diverter plate, and an adjustment ring is provided at the end of the fixed shaft.

[0012] The flow rate control device includes a movable groove arranged on the nozzle, a diaphragm arranged above the movable groove, a sleeve arranged on the outside of the nozzle, a movable shaft arranged in the sleeve, and a spring cooperating with the movable shaft; an adsorption plate is arranged above the movable shaft, the adsorption plate is in contact with the diaphragm, and an annular electromagnet is arranged on the outside of the sleeve, and the annular electromagnet adsorbs the adsorption plate of the movable shaft.

[0013] The connecting pipeline is provided with a nozzle, and the nozzle is used to guide the combustion-supporting agent sprayed out of the connecting pipeline.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The air intake can be controlled according to the calcination temperature required by calcining furnaces for different purposes, and the calcination conditions of multiple calcining furnaces in the calcining workshop can be met at the same time. Moreover, the combustion aid can be added according to different calcination stages, so that the combustion aid is combined with the added gas and enters the furnace body to rapidly increase the temperature inside the furnace body, further improving the conductivity of the petroleum coke after the break. The tar in the connecting pipeline can be discharged without affecting the addition of the combustion aid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 This is an interior view of the calcining workshop of the utility model.

[0017] Attached Figure 2 It is an overall view of the device in the utility model.

[0018] Attached Figure 3 It is an internal view of the ejector assembly in the utility model.

[0019] Attached Figure 4 It is an internal view of the ejector assembly in the utility model.

[0020] Attached Figure 5 This is an overall view of the device of Example 1 of the present utility model.

[0021] Attached Figure 6 This is an overall view of the device of Example 2 of the present utility model.

[0022] Attached Figure 7 This is an internal view of Example 2 of the present utility model.

[0023] Attached Figure 8 This is an overall view of the device of Example 3 of the present utility model.

[0024] Attached Fig. 9 This is an internal view of the device of Example 3 of the present utility model.

[0025] Numbers shown in the accompanying drawings:

[0026] 1. Connecting pipeline; 2. Ejector pipeline; 3. Air inlet; 4. Nozzle; 5. Combustion-supporting agent addition port; 6. Intake chamber; 7. Gradually contracting section; 8. Diffuser section; 9. Oil drain tank; 10. Limiting cylinder; 11. Oil baffle plate; 12. Diverter ball; 13. Fixed shaft; 14. Diverter pipe mouth; 15. Diverter plate; 16. Adjusting ring; 17. Nozzle; 18. Movable groove; 19. Diaphragm; 20. Sleeve; 21. Movable shaft; 22. Spring; 23. Adsorption plate; 24. Ring electromagnet; 25. Furnace body; 26. Air inlet pipeline. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0028] The utility model discloses a combustion-supporting agent adding pipe group of the petroleum coke reaction circulation air intake system in the calcining furnace. As described in the background technology, since the ventilation openings of the furnace body 25 are reduced and the air intake volume needs to be further increased, for the calcining workshop of the entire carbon production, there is a pulse bag dust removal equipment in the calcining workshop to filter the dust and other waste gases generated by the crushed and calcined petroleum coke. The dust-containing gas enters the dust collector under the gravity of the induced draft fan, and the large particles of dust in the gas are filtered under the action of gravity. The fine dust adheres to the outer surface of the bag under the filtering effect of the bag. After filtering, the bag is cleaned of dust by a pressurized pulse air cannon, so that the dust in the filter holes of the bag falls off, and the purified gas passes through the bag and is directly discharged into the atmosphere through the ventilation duct. This dust removal method has disadvantages. The bags of the pulse bag dust removal equipment need to be replaced regularly. Once the bags are broken or the filtering effect deteriorates, if the smoke is not discovered in time, it will be directly discharged into the atmosphere, affecting the environment in the atmosphere and causing an increase in PM2.5 in the environment. This is because the gas passing through the pulse dust removal equipment is continuously transported by the induced draft fan and is eventually discharged into the atmosphere after dust removal. Combined with the content of the improvement to the furnace body 25 described in the background technology, because the reduction of the air inlet 3 on the furnace body 25 will lead to a decrease in the amount of oxygen entering the furnace body 25, and the air inlet 3 on the furnace body 25 is all natural wind, which will cause the temperature in the furnace body 25 to rise slowly and fail to reach a specific temperature. Therefore, the gas discharged from the ventilation duct of the pulse bag dust removal equipment is combined with the air inlet pipeline of the circulating air intake system. The following is the specific structure:

[0029] As the instruction manual Figure 1 — Figure 3 As shown, it includes an ejector assembly connected to the air inlet pipeline and a connecting pipeline 1 connected to the ejector pipeline 2; the ejector is based on the Venturi effect, and low pressure will be generated near the high-speed flowing fluid, thereby generating an adsorption effect. The ejector assembly includes an ejector pipeline 2, an air inlet 3 arranged at one end of the ejector pipeline 2, a nozzle 4 arranged at the air inlet 3, and an oxidant addition port 5 connected to the outer wall of the ejector pipeline 2; a flow rate control device is arranged in the nozzle 4, an inhalation chamber 6 is arranged between the nozzle 4 and the oxidant addition port 5, and a tapered section 7 is arranged between the inhalation chamber 6 and the connecting pipeline 1; the connecting pipeline 1 and the nozzle 4 are both located in the furnace body 25, and a pressure diffuser section 8 is arranged in the connecting pipeline 1, and the cross-section of the pressure diffuser section 8 is larger than that of the tapered section 7.

[0030] As shown in the attached figure of the instruction manual Figure 3As shown, air is taken in through a nozzle 4 with a small cross-sectional area, so that the flow rate of the gas is accelerated, thereby reducing the pressure in the suction chamber 6 to be lower than the external atmospheric pressure, so that the combustion aid at the combustion aid addition port 5 enters the suction chamber 6 through the atmospheric pressure and mixes with the gas entering from the air inlet pipe. After the combustion aid and the gas are mixed, they pass through the tapered section 7 into the diffuser section 8 in the connecting pipe 1, and then directly enter the interior of the furnace body 25 from the diffuser section 8.

[0031] As for the flow rate control device, the existing flow rate control device is a flap valve, which is arranged between the air inlet pipeline and each connecting pipeline 1, and the opening and closing degree of the flap valve is controlled by manual adjustment. Because there are multiple calcining furnaces in each calcining workshop to calcine petroleum coke at the same time, it is necessary to supply oxygen to each calcining furnace at the same time, so each calcining furnace is provided with a connecting pipeline 1 connected to the air inlet pipeline. When the airflow generated by the induced draft fan of the pulse dust removal equipment enters the air inlet pipeline, it enters the furnace body 25 of the calcining furnace through the connecting pipeline 1, which can play a certain role in increasing oxygen. However, there are multiple (28) calcining furnaces in each calcining workshop to calcine petroleum coke at the same time. Because the uses of calcined petroleum coke are different, the reaction temperature when calcining petroleum coke is different, and the heating stage when calcining petroleum coke is different, and the required heating temperature is also different.

[0032] According to the reaction temperature of the purpose, for example: the calcination temperature of the anode for aluminum smelting is 1150℃; the calcination temperature of ordinary graphite electrodes is 1250℃-1350℃; the calcination temperature of high-power and ultra-high-power electrodes is 1400℃ or higher. According to the reaction temperature of the heating stage: the initial stage of heating is heated to 700℃-1000℃ and kept at the corresponding temperature for one hour, and then continuously heated to the heating temperature required by each product and kept for one hour. For example, the anode for aluminum smelting needs to be heated to 700℃ and kept for one hour, and then continuously heated to 1150℃ and kept for one hour.

[0033] When air is introduced into the furnace body 25 through the air inlet duct, the amount of air introduced into the furnace body 25 is controlled by the flow rate control device, as shown in the accompanying drawings of the specification. Figure 3 and Figure 4 As shown, a flow rate control device is provided in the nozzle 4, including a movable groove 18 provided on the nozzle 4, a diaphragm 19 provided above the movable groove 18, a sleeve 20 provided outside the nozzle 4, a movable shaft 21 provided in the sleeve 20, and a spring 22 matched with the movable shaft 21;

[0034] An adsorption plate 23 is provided above the movable shaft 21, and the adsorption plate 23 is fitted with the diaphragm 19, and the adsorption plate 23 and the diaphragm 19 are lifted by the elastic force of the spring 22. An annular electromagnet 24 is provided on the outside of the sleeve 20, and the annular electromagnet 24 adsorbs the adsorption plate 23 of the movable shaft 21. By controlling the magnitude of the annular magnet current, the magnetic force of the annular electromagnet 24 is controlled. The magnetic force of the electromagnet controls the distance of the adsorption plate 23 lifting the diaphragm 19, thereby controlling the cross-section at the nozzle 4, and the size determines the flow rate at the air inlet 3. For example, the greater the magnetic force of the electromagnet, the shorter the distance of the adsorption plate 23 lifting the diaphragm 19, and the slower the flow rate at the nozzle 4. The flow rate at the nozzle 4 affects the rate of inhalation of the combustion-supporting agent in the suction chamber 6, and the faster the flow rate, the greater the amount of the combustion-supporting agent inhaled. The size of the electromagnet current of the flow rate control device can freely adjust the opening size at the nozzle 4, thereby controlling the flow rate at the air inlet 3, so that the amount of the combustion-supporting agent added is inversely proportional to the current size, and the amount of the combustion-supporting agent added is more accurately controlled.

[0035] It should be noted that: the waste gas such as dust discharged from the pulse dust removal equipment enters the air inlet pipeline, then enters the connecting pipeline 1 from the air inlet pipeline, and then enters the furnace body 25 from the connecting pipeline 1. After entering the furnace body 25, the waste gas such as dust will form tar when it encounters heat. The tar will adhere to the inner wall of the connecting pipeline 1, but the tar will be burned after entering the furnace body 25. After the tar adheres to the inner wall of the connecting pipeline 1, the addition of the combustion aid into the furnace body 25 will be affected. The situation of different types of combustion aids is described in detail according to the following embodiments:

[0036] Embodiment 1 (combustion-supporting agent is liquid):

[0037] When the combustion aid is liquid, such as methanol fuel combustion aid, etc., unlike gas combustion aid and powder combustion aid, the liquid combustion aid has an advantage that even if tar is attached to the inner wall of the connecting pipe 1, it will be brought into the calcining furnace body 25 by the liquid combustion aid, so there is no need to set up an oil discharge component for the liquid combustion aid. However, the liquid combustion aid is different from other combustion aids in that the liquid combustion aid has a greater impact on the temperature inside the furnace body 25. Since the temperature difference between the inside and outside of the furnace body 25 is too large, in order to minimize the impact of the liquid combustion aid on the temperature inside the furnace body 25, the nozzle 17 needs to be improved: as shown in the accompanying drawings of the specification Figure 5As shown, the nozzle 17 is improved into a guide cover, so that the liquid combustion aid sprayed from the diffusion section of the connecting pipeline 1 is connected to the connecting pipeline 1, and the diameter of the diffusion section is further increased. The liquid combustion aid and air are sprayed into the furnace body 25 along the nozzle 17. Since the gas and the liquid combustion aid are mixed in the ejector assembly and the flow rate is fast, the sprayed liquid combustion aid is in an atomized state, and is not sprayed into the furnace body 25 in the form of a water column. By improving the nozzle 17, the effect of the liquid combustion aid sprayed from the connecting pipeline 1 is changed. It originally sprayed in a columnar shape. After the nozzle 17 is installed, it has a guiding effect on the atomized liquid combustion aid, and the area after the liquid combustion aid is sprayed is increased, so that the liquid combustion aid is sprayed in a scattered state, reducing the influence of long-term concentrated spraying on one point on the temperature in the furnace body 25.

[0038] Embodiment 2 (combustion-supporting agent is gas):

[0039] When the added combustion aid is a gas, it should be noted that the combustion aid is a gas that can help combustion, but it may not be able to burn itself. Therefore, the gaseous combustion aid does not only refer to air and oxygen, but also ozone, chlorine, etc. However, considering the comprehensive cost and ease of use, the gaseous combustion aid here refers to air. Because the air supply only through the booster fan and the induced draft fan is insufficient, it is necessary to further add air to the furnace body 25. Therefore, an electromagnetic gate valve is used at the combustion aid addition port 5. The electromagnetic gate valve is connected to the air. When the furnace body 25 is in the first calcination stage, air is supplied through the booster fan and the induced draft fan. When the furnace body 25 is in the second calcination stage, the electromagnetic gate valve is opened to connect with the outside air, which greatly increases the air intake, increases the oxygen content in the furnace body 25, and thus increases the calcination temperature.

[0040] However, tar and dust adhere to the inner wall of the connecting pipe 1 for a long time. If they are not cleaned, the flow rate of the gas combustion aid will be affected, thereby reducing the gas flow of the combustion aid, which greatly reduces the effect of the gas combustion aid on oxygenation in the furnace body 25. In the long run, it is very likely to cause blockage of the inner wall of the connecting pipe 1. Therefore, the connecting pipe 1 is improved:

[0041] As shown in the attached figure of the instruction manual Figure 6 and Figure 7As shown, the connecting pipeline 1 is arc-shaped, and the material used for the connecting pipeline 1 is a high-temperature resistant alloy. An oil drain groove 9 is provided in the connecting pipeline 1, and an oil-blocking movable part is provided on the outside of the oil drain groove 9. The oil-blocking movable part includes a limit cylinder 10 and an oil-blocking plate 11 connected to the outside of the limit cylinder 10. The oil-blocking plate 11 is always in contact with the outside of the connecting pipeline 1. Because the connecting pipeline 1 is arc-shaped and the pipe mouth is discharged upward, the tar in the connecting pipeline 1 is gathered at the arc of the connecting pipeline 1, and then gathered in the oil drain groove 9. After the tar is gathered in the oil drain groove 9, under the action of the air pressure and gas in the connecting pipeline 1, the tar is discharged from the gap of the oil drain groove 9 into the furnace body 25 for incineration, so there is no need to deliberately open the oil-blocking plate 11.

[0042] As shown in the attached figure of the instruction manual Figure 6 and Figure 7 As shown, the nozzle 17 is also provided at the nozzle of the connecting pipeline 1, and the nozzle 17 is provided with an outlet. The outlet of the nozzle 17 plays a role in guiding the gas entering the furnace body 25, so that the gas entering the furnace body 25 is discharged upward, increasing the oxygen content in the furnace body 25, while not directly acting on the fuel in the furnace body 25, avoiding the large temperature difference between the gas and the furnace body 25, affecting the calcination temperature in the furnace body 25, resulting in poor heating effect. The gas entering the furnace body 25 is discharged upward, so that the oxygen content of the top layer in the furnace body 25 is increased, so that the gas in the furnace body 25 is circulated.

[0043] Embodiment 3 (combustion improver is powder):

[0044] When the combustion aid is a powder, such as potassium permanganate, the tar attached to the connecting pipe 1 has little effect on the gaseous combustion aid. The difference between powder and gas is that the powdered combustion aid will adhere to the tar, which will not only lead to waste of the combustion aid, but also cause the powdered combustion aid to mix with the tar and block the connecting pipe 1. Therefore, the above problem is solved by the following structure:

[0045] As shown in the attached figure of the instruction manual Figure 8 As shown, because the tar produced after preheating adheres to the inner wall of the pipeline, the length of the connecting pipeline 1 is reduced as much as possible, so that the length of the connecting pipeline 1 is 400-800mm. After reducing the length of the connecting pipeline 1, in order not to affect the spraying distance of the powdered combustion aid, it is necessary to further improve the diameter of the cross section of the tapered section 7 to increase the flow rate of the combustion aid powder and the air. Therefore, the cross-sectional diameter of the tapered section 7 of the connecting pipeline 1 is 40-100mm. By increasing the flow rate of the combustion aid powder and the air, the tar and the combustion aid powder attached to the pipe wall of the diffusion section of the connecting pipeline 1 are blown out by the air. After testing, it is concluded that: since the tar is attached to the pipe wall, when the gas is blown to the tar first, the tar cannot be blown off directly, resulting in the combustion aid powder agglomerating after contacting the tar and spraying into the furnace body 25, resulting in insufficient use of the combustion aid, and it may block the pipeline, so it needs further improvement:

[0046] As shown in the attached figure of the instruction manual Fig. 9 As shown, a diverter guide is provided in the connecting pipeline 1, including a diverter ball 12, a fixed shaft 13 connected to the diverter ball 12, a diverter pipe port 14 arranged on the outside of the connecting pipeline 1, and a diverter plate 15 arranged at the diverter pipe port 14. The fixed shaft 13 cooperates with the diverter plate 15, and an adjustment ring 16 is provided at the end of the fixed shaft 13. The diverter pipe port 14 is arranged on the outside of the connecting pipeline 1, and the fixed shaft 13 and the connecting pipeline 1 are matched through a fixed hole. A block is provided at the other end of the fixed shaft 13 and the inner side of the diverter plate 15 for limiting, so as to prevent the fixed shaft 13 from being displaced under the action of gravity, so that the diverter ball 12 can be maintained at the center of the connecting pipeline 1. When tar is attached to the inner wall of the connecting pipeline 1, the gas is diverted by the diverter ball 12 when passing through the diffusion section of the connecting pipeline 1, so that the gas is blown out from both sides of the inner wall of the pipeline instead of from the center of the pipeline. The diverted gas can directly act on the tar attached to the inner wall of the pipeline, and the agglomeration of the combustion-aiding agent powder and the tar can be reduced after being blown out. However, if tar is stuck on the diverter ball 12, the combustion-aiding agent powder will also adhere to the diverter ball 12. Therefore, an adjustment ring 16 is provided at the end of the fixed shaft 13. The angle of the adjustment ring 16 is manually rotated regularly. After the angle is changed, the gas will blow off the powder and tar on the diverter ball 12 to avoid the effect of the combustion-aiding agent being affected by the tar stuck on the diverter ball 12.

[0047] Because the powdered combustion aid needs to be evenly sprayed inside the furnace body 25, if the powdered combustion aid is concentratedly sprayed at a certain angle, the powdered combustion aid will not have time to play a role and will be covered by the newly added powdered combustion aid, resulting in insufficient volatilization of the combustion aid. Therefore, the nozzle 17 shape of the connecting pipe 1 needs to be changed, as shown in the attached figure of the specification. Fig. 9 As shown, the nozzle 17 is of duckbill type (flat), and a spraying seam is provided in the middle of the nozzle 17. The powdered combustion aid enters into the nozzle 17 from the connecting pipeline 1, and is sprayed out from the nozzle 17 in a fan shape, so that the spraying area of ​​the powdered combustion aid is larger, and the powdered combustion aid is dispersed after being sprayed out from the nozzle 17, rather than being sprayed in a concentrated, single manner.

[0048] It should be noted that the bag dust collector will only discharge unfiltered dust and other waste gases into the pipeline when the filter bag is working abnormally, which is normal air emission. However, in order to avoid the filter bag of the bag dust collector being damaged and not being discovered in time, the petroleum coke dust enters the connecting pipeline 1 and affects the connecting pipeline 1. Therefore, it is not that the bag dust collector discharges petroleum coke dust into the air inlet pipeline for a long time, but in order to avoid special circumstances, it is necessary to solve the impact on the connecting pipeline 1.

[0049] In the above embodiments, the effects of adding different combustion aids are different. However, for calciners with different calcination purposes, it is the combustion-supporting effect of different types of combustion aids, rather than the device itself, that determines whether the device is suitable for the calciner. Moreover, in the specific implementation process, the device itself is not only suitable for adding combustion aids, because catalysts, desulfurizers, sulfur-fixing agents, etc. may need to be added during the calcination process, and they can also be added through the device.

[0050] For Example 1 and Example 3, the combustion aid addition port 5 not only needs to add an electromagnetic gate valve, but also a matching silo and a one-way valve connected to the external atmospheric pressure. This is not within the scope of consideration of this application, so it is simply summarized.

[0051] In summary, the device can be used to control the air intake according to the calcination temperature required by calcining furnaces for different purposes, can simultaneously meet the calcination conditions of multiple calcining furnaces in the calcining workshop, and can add combustion aids according to different calcination stages, so that the combustion aids are combined with the added gas, and after entering the furnace body 25, the temperature in the furnace body 25 is rapidly increased, further improving the conductivity of the petroleum coke after the break. The tar in the connecting pipeline 1 can be discharged without affecting the addition of the combustion aid.

Claims

1. The combustion-supporting agent adding pipe group of the petroleum coke reaction cycle air intake system in the calcining furnace is characterized by: It comprises an ejector assembly and a connecting pipeline (1) connected to an ejector pipe (2) of the ejector assembly; The ejector assembly comprises an ejector pipe (2), an air inlet (3) arranged at one end of the ejector pipe (2), a nozzle (4) arranged at the air inlet (3), and an oxidant addition port (5) connected to the outer wall of the ejector pipe (2); a flow rate control device is arranged in the nozzle (4); a suction chamber (6) is arranged between the nozzle (4) and the oxidant addition port (5); and a tapered section (7) is arranged between the suction chamber (6) and the connecting pipeline (1); The connecting pipeline (1) and the nozzle (4) are both located in the furnace body (25); a diffuser section (8) is provided in the connecting pipeline (1); and the cross section of the diffuser section (8) is larger than that of the tapered section (7).

2. The combustion-supporting agent adding pipe group of the petroleum coke reaction cycle air intake system in the calcining furnace according to claim 1, characterized in that: The connecting pipeline (1) is arc-shaped, and an oil drain groove (9) is provided in the connecting pipeline (1). A limit cylinder (10) and an oil baffle plate (11) connected to the outside of the limit cylinder (10) are provided outside the oil drain groove (9).

3. The combustion-supporting agent adding pipe group of the petroleum coke reaction cycle air intake system in the calcining furnace according to claim 1, characterized in that: The length of the connecting pipeline (1) is 400-800 mm, the cross-sectional diameter of the tapered section (7) of the connecting pipeline (1) is 40-100 mm, and a flow diversion guide is provided in the connecting pipeline (1), and the flow diversion guide can divert the fluid in the connecting pipeline (1).

4. The combustion-supporting agent adding pipe group of the petroleum coke reaction cycle air intake system in the calcining furnace according to claim 3, characterized in that: The flow dividing guide comprises a flow dividing ball (12), a fixed shaft (13) connected to the flow dividing ball (12), a flow dividing pipe opening (14) arranged outside the connecting pipeline (1), and a flow dividing plate (15) arranged at the flow dividing pipe opening (14); the fixed shaft (13) cooperates with the flow dividing plate (15), and an adjusting ring (16) is provided at the end of the fixed shaft (13).

5. The combustion-supporting agent adding pipe group of the petroleum coke reaction cycle air intake system in the calcining furnace according to claim 1, characterized in that: The connecting pipeline (1) is provided with a nozzle (17), and the nozzle (17) is used to guide the combustion-supporting agent sprayed out of the connecting pipeline (1).

6. The combustion-supporting agent adding pipe group of the petroleum coke reaction cycle air intake system in the calcining furnace according to any one of claims 1 to 5, characterized in that: The flow rate control device comprises a movable groove (18) arranged on the nozzle (4), a diaphragm (19) arranged above the movable groove (18), a sleeve (20) arranged outside the nozzle (4), a movable shaft (21) arranged in the sleeve (20), and a spring (22) cooperating with the movable shaft (21); An adsorption plate (23) is provided above the movable shaft (21), and the adsorption plate (23) is in contact with the diaphragm (19). An annular electromagnet (24) is provided on the outside of the sleeve (20), and the annular electromagnet (24) is used to adsorb the adsorption plate (23) of the movable shaft (21).

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