Device for preparing carbon black on line

Abstract

The utility model discloses a device for preparing carbon black on line, which comprises a furnace tube assembly A, a furnace tube assembly B, a mixing chamber, a heat preservation pipeline and an electric heater, and is characterized in that the furnace tube assembly A and the furnace tube assembly B are of the same structure, and outlets of the furnace tube assembly A and the furnace tube assembly B are respectively connected with the pipeline communicated with an inlet of the mixing chamber with a heat preservation function through trapezoidal connecting structures; an outlet of the mixing chamber is connected with a heat preservation pipeline with a built-in electric heater; a roundabout air supply structure is arranged in the furnace tube assembly A, the roundabout air supply structure comprises a stepped air inlet pipe and an inflation cover, and a high-temperature-resistant ceramic tube is arranged outside the roundabout air supply structure. Natural gas is used as a raw material, and safety and environmental protection are achieved; the mixing chamber and the pipeline are subjected to heat preservation treatment and auxiliary electric heating, so that liquid coal tar is not separated out before combustion of the spray gun; the carbon black is large in particle size and good in high-temperature lubricating property; the production cost can be reduced by using natural gas for production.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical field, concretely is a device of online preparation carbon black. BACKGROUND

[0002] At present, the surface lubrication method of the rolling mill roll is mostly disclosed by the patent number 0023675.5, which uses natural gas, petroleum liquefied gas, mineral oil and other gases or liquids as fuel, makes them pass through the incomplete combustion of the smoke gun, generates smoke containing carbon black, sprays the smoke on the roll to lubricate the roll. Its characteristics are that the black soot becomes white soot under the action of high temperature and high pressure in the rolling process, the surface of the rolled aluminum plate is free of black spots and black strips, and the surface finish is high. Most of the present rolling mills use this method to burn petroleum liquefied gas for lubricating the roll, but in the process of use, most of the liquefied gas is burned, the generated carbon black is less, a large amount of carbon dioxide is discharged, the utilization rate is low, and the cost is high.

[0003] The patent number CN201220482561.1 rolling mill roll surface lubrication machine discloses that petroleum liquefied gas, natural gas, mineral oil, vegetable oil and other gases or liquids are used as raw materials for high-temperature cracking to prepare carbon black mixed gas, and then the mixed gas is delivered to the spray gun in front of the roll to burn, so as to obtain more carbon black effect and improve the use efficiency of liquefied gas. However, in the process of use, a large amount of coal tar is easily produced when the petroleum liquefied gas is high-temperature cracked, the coal tar is turned into coke under the action of high temperature in the furnace tube on the one hand, causing the furnace tube to be blocked, affecting the normal work of the rolling mill roll surface lubrication machine, on the other hand, the coal tar can be sprayed on the roll through the gas pipeline, seriously affecting the surface quality of the aluminum plate and causing quality accidents; when the pipe is burned, the waste gas is discharged in the air, polluting the air in the workshop. Therefore, this technology is not popularized in the market.

[0004] The patent number CN202320909418.9 discloses an online preparation device for carbon black, which comprises a raw material gas cylinder compressed air station and an inert dilution gas cylinder. The raw material gas and the inert dilution gas are sent into a vacuum generator after being adjusted by respective flow meters, and then are sent into the gas inlet of an anti-coking agent volatilization barrel from the exhaust port of the vacuum generator. The anti-coking agent volatilization barrel is connected with the gas inlet A of a gas control two-position four-way valve, and the carbon black is cracked in the furnace tube through the gas control two-position four-way valve. The compressed air is adjusted by the flow meter, and then is sent into the gas inlet B of the gas control two-position four-way valve through the coking agent barrel. The gas is cooled in the quenching chamber, and then is mixed in the mixing chamber. The gas is sent into the spray head to perform incomplete combustion with the added raw material gas and compressed air, and the carbon black layer is formed on the metal surface. The utility model discloses improve the use efficiency of raw materials, the carbon black particle size is large, and the carbon black has good intermetallic high-temperature lubricating performance. However, during use, the metal furnace tube has a short service life and needs to be replaced after 2000-3000 hours of use. Therefore, a furnace tube with higher temperature resistance and appropriate price is needed. On the other hand, when natural gas is used for long-time production, coal tar is precipitated at the spray head and dripped on the aluminum plate, which affects normal production. The use of petroleum liquefied gas has greater safety hazards. The use of natural gas is the best choice.

[0005] Therefore, a new online preparation device for carbon black using natural gas as raw material is needed to overcome the defects of the above device. SUMMARY

[0006] The utility model discloses a kind of online preparation devices for carbon black, to solve the problems raised in the above background art.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] An online preparation device for carbon black using natural gas as raw material, comprising a furnace tube assembly A17, a furnace tube assembly B29, a mixing chamber 19, a heat preservation pipeline 21 and an electric heating 23. The furnace tube assembly A17 and the furnace tube assembly B29 have the same structure, and their outlets are connected to the pipeline connecting the inlet of the mixing chamber 19 with heat preservation function through trapezoidal connection structure. The outlet 20 of the mixing chamber 19 is connected to the heat preservation pipeline 21 with the electric heating 23 inside. The furnace tube assembly A17 is provided with a detour gas feeding structure inside, which comprises a ladder-shaped gas inlet pipe 36 and a detour cover 37. The detour gas feeding structure is provided with a high-temperature-resistant ceramic pipe 41 outside.

[0009] Further improvement, the ladder-shaped gas inlet pipe 36 is a two-stage ladder shaft hollow thin-wall structure, and the small shaft is fixedly connected to the gas inlet 34 of the furnace tube assembly at one end.

[0010] Further improvement, the return cover 37 is fixed on the large shaft end of the stepped air inlet pipe 36, the inner wall of the return cover 37 and the outer wall of the large end of the stepped air inlet pipe 36 are provided with a gap to form a cavity structure, the return cover 37 is provided with a gas outlet hole 35, which is used for prolonging the reaction time of the gas and changing the flow direction, thereby improving the cracking efficiency.

[0011] Further improvement, the high-temperature-resistant ceramic pipe 41 is provided with a flange 40 and a ladder 42, the flange 40 is used for being fastened and connected with the air inlet 34 of the furnace pipe assembly through bolts, and the ladder 42 is used for fixedly connecting the stepped connection structure.

[0012] Further improvement, the stepped connection structure comprises a stepped part 39, a sealing ring 38, a nut 43 and a threaded connection 44, the stepped part 39 passes through the inside of the high-temperature-resistant ceramic pipe 41 and is sleeved with the sealing ring 38, the stepped part 39 is kept in close contact with the ladder 42 through the nut 43, and the stepped part 39 is provided with the threaded connection 44.

[0013] Further improvement, the outer layer of the heat preservation mixing chamber 19 is provided with a heat preservation layer 18.

[0014] Further improvement, the outside of the heat preservation pipeline 21 is provided with a pipeline heat preservation layer 22.

[0015] Compared with the prior art, the device has the advantages that:

[0016] 1. An on-line device for preparing carbon black by taking natural gas as raw material, characterized in that the device comprises a double-tube heating electric furnace, a furnace pipe assembly composed of a high-temperature-resistant ceramic pipe, a return gas feeding structure and a stepped connection structure, a mixing chamber with heat preservation function, and a heat preservation pipeline with auxiliary electric heating function; the furnace pipe assembly is connected with the mixing chamber with heat preservation function through the stepped connection structure, the outlet of the mixing chamber is connected with the heat preservation pipeline with auxiliary electric heating function; natural gas and inert carrier gas are mixed by a vacuum generator, are sent into one of the furnace pipe assemblies for high-temperature cracking, and carbon black is prepared; compressed air is sent into the other furnace pipe assembly to burn and deposit carbon black and coke; the two furnace pipe assemblies work alternately, the outgoing gas is mixed in the mixing chamber and is sent into a spray gun for combustion, and the carbon black is sprayed on the surface of a roller.

[0017] 2. The mixing chamber and the pipeline are heat preserved, and auxiliary electric heating is provided, so that liquid coal tar is not separated out before the spray head is combusted.

[0018] 3. The high-temperature-resistant ceramic furnace pipe is high-temperature-resistant, anticorrosive and long in service life.

[0019] 4. Natural gas is lower than air density, safety is higher than using petroleum liquefied gas.

[0020] 5. Natural gas belongs to clean environmental protection high-quality resources, can reduce carbon dioxide emission, achieves the purpose of emission reduction. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The schematic diagram of the utility model;

[0022] Figure 2 Furnace tube assembly schematic diagram;

[0023] Figure 3 High-temperature-resistant ceramic furnace tube structure diagram.

[0024] The serial number name in the drawing

[0025] 1 inert carrier gas inlet pipeline, 2 natural gas inlet pipeline, 3 furnace inert carrier gas flow meter, 4 furnace natural gas regulating valve, 5 upper roller natural gas regulating valve, 6 lower roller natural gas regulating valve, 7 compressed air inlet pipeline, 8 air control two-way three-way valve inlet, 9 air control two-way three-way valve exhaust, 10 air control two-way three-way valve, 11 furnace compressed air flow meter, 12 two-way three-way electromagnetic valve A, 13 de-focusing agent volume bucket, 14 vacuum generator, 15 air control two-way four-way valve inlet A, 16 air control two-way four-way valve outlet A, 17 furnace tube assembly A, 18 mixing chamber insulation layer, 19 mixing chamber, 20 mixing chamber outlet, 21 heat preservation pipeline, 22 pipeline insulation layer, 23 electric heating, 24 lower roller mixed gas conveying pipe, 25 two-way three-way electromagnetic valve B, 26 air control two-way four-way valve inlet B, 27 air control two-way four-way valve, 28 air control two-way four-way valve outlet B, 29 furnace tube assembly B, 30 double-tube heating electric furnace, 31 upper roller mixed gas conveying pipe, 32 upper roller spray gun, 33 lower roller spray gun, 34 furnace tube assembly inlet, 35 outlet small hole, 36 stepped inlet pipe, 37 return cover, 38 sealing ring, 39 trapezoidal part, 40 high-temperature-resistant ceramic furnace tube flange, 41 high-temperature-resistant ceramic furnace tube, 42 high-temperature-resistant ceramic furnace tube ladder flange, 43 nut, 44 connecting live joint thread. DETAILED DESCRIPTION

[0026] The following is natural gas raw material, nitrogen is used as carrier gas, the principle of the surface lubrication machine of the roll of the casting and rolling mill, the working process is systematically explained.

[0027] EMBODIMENT

[0028] According to the chemical knowledge, natural gas cracking carbon requires 1100-1200 degrees temperature, at high temperature 0.5S-1S can achieve cracking carbon, but the natural gas from the low temperature to high temperature in the process of furnace tube, the reaction is very complex, it is easy to generate coal tar this polymerization formed mixture; this coal tar through the experiment verification is gas state above 150 degrees, below 150 changes into liquid state.

[0029] Based on the above knowledge, the double tube heating electric furnace 30 furnace temperature control in natural gas cracking temperature 1100-1200 degrees range.

[0030] In order to adapt to 1100-1200 degrees high temperature, the furnace tube is made of high temperature resistant ceramic raw materials.

[0031] In order to not precipitate coal tar liquid before the spray gun ignition, the pipeline containing carbon black and coal tar mixture is not less than 150 degrees, the temperature of auxiliary electric heating is set at 350 degrees.

[0032] The implementation process is:

[0033] As Figure 1 , natural gas through natural gas pipeline 2 through the furnace natural gas regulating valve 4 adjustment, nitrogen through inert gas pipeline 1 through the furnace inert gas flow meter 3 adjustment, through the vacuum generator 14 for mixing, mixed gas into two position four way valve inlet A 15;

[0034] Compressed air through compressed air inlet pipeline 7 and nitrogen through inert gas pipeline 1 respectively into the gas control two position three way valve 10 inlet 11, exhaust port 12, compressed air or nitrogen through the gas control two position three way valve 10 outlet connected to the furnace compressed air flow meter 11, gas control two position three way valve through two position three way solenoid valve A12 control, realize the switch of compressed air and inert gas nitrogen, after switching through the furnace compressed air flow meter 11 adjustment after entering the decoking agent volume barrel 13, bring into the decoking agent, into the gas control two position four way valve inlet B26; gas control two position four way valve outlet A16, gas control two position four way valve outlet B28 respectively connected to the furnace tube assembly A17, furnace tube assembly B29.

[0035] The trapezoidal part 39 of the furnace tube assembly A17, furnace tube assembly B29 is connected with the mixing chamber 19 through the connecting loose thread 44, and the mixing chamber 19 is provided with a mixing chamber insulation layer 18.

[0036] The mixing chamber outlet 20 is connected with the heat preservation pipeline 21, and the heat preservation pipeline 21 is provided with a pipeline insulation layer 22 and an electric heating 23.

[0037] The upper roller mixed gas delivery pipe 31 and the lower roller mixed gas delivery pipe 24 are connected to the end of the heat preservation pipe 21, the upper roller mixed gas delivery pipe 31 is communicated with the natural gas regulated by the upper roller natural gas regulating valve 5 of the natural gas inlet pipe 2, the lower roller mixed gas delivery pipe 24 is communicated with the natural gas regulated by the lower roller natural gas regulating valve 6 of the natural gas inlet pipe 2, and they are respectively connected to the upper roller spray gun 32 and the lower roller spray gun 33.

[0038] The pneumatic two-position four-way valve 27 is controlled by the two-position three-way electromagnetic valve B25, the pneumatic two-position three-way valve 10 is controlled by the two-position three-way electromagnetic valve A12, and the operation of the two-position three-way electromagnetic valve A12 and the two-position three-way electromagnetic valve B25 is controlled by the PLC program.

[0039] During operation, the natural gas and nitrogen are sent into one furnace pipe assembly to realize high-temperature cracking of the natural gas and prepare carbon black, the compressed air is sent into another furnace pipe assembly to burn and deposit the carbon black and coking, and the two furnace pipe assemblies work alternately.

[0040] As Figure 2 The furnace pipe assembly schematic diagram illustrates the structure of the furnace pipe assembly and the gas flow process.

[0041] The stepped gas inlet pipe 36 is connected to the furnace pipe assembly gas inlet 34, and the bypass cover 37 is welded on the stepped gas inlet pipe 36, the bypass cover 37 is provided with the outlet small hole 35, and the gas flow process in the high-temperature resistant ceramic furnace pipe 41 is that the gas enters from the furnace pipe assembly gas inlet 34, passes through the stepped gas inlet pipe 36, is delivered into the bypass cover 37, is turned back under the action of the bypass cover 37, and flows out from the outlet small hole 35 of the bypass cover 37, the natural gas enters the bypass structure and the furnace pipe to be fully cracked, or the compressed air enters the bypass structure and the furnace pipe to burn and deposit the carbon black or coking, and then enters the mixing chamber 19 from the trapezoidal part 44.

[0042] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An apparatus for on-line production of carbon black comprising a furnace tube assembly A (17), a furnace tube assembly B (29), a mixing chamber (19), an insulation duct (21) and an electric heating (23), characterized in that: The furnace tube assembly A (17) and the furnace tube assembly B (29) are the same structure, the outlet thereof is connected with the pipeline of the inlet of the mixing chamber (19) with heat preservation function through the trapezoidal connecting structure, the outlet (20) of the mixing chamber (19) is connected with the heat preservation pipeline (21) with the electric heating (23) arranged inside; the furnace tube assembly A (17) is internally provided with the bypass gas feeding structure, the bypass gas feeding structure comprises the stepped gas inlet pipe (36) and the bypass cover (37), and the outside of the bypass gas feeding structure is provided with the high-temperature-resistant ceramic pipe (41).

2. The apparatus for online preparation of carbon black as claimed in claim 1 wherein: The stepped gas inlet pipe (36) is a two-stage stepped shaft hollow thin-wall structure, and one end of the small shaft is fixedly connected with the gas inlet (34) of the furnace tube assembly.

3. The apparatus for online preparation of carbon black as claimed in claim 1 wherein: The bypass cover (37) is fixedly sleeved on one end of the large shaft of the stepped gas inlet pipe (36), the inner wall of the bypass cover (37) and the outer wall of the large end of the stepped gas inlet pipe (36) are provided with a gap to form a cavity structure, and a gas outlet small hole (35) is formed in the bypass cover (37).

4. The apparatus for online preparation of carbon black as claimed in claim 1 wherein: The high-temperature-resistant ceramic pipe (41) is provided with a flange opening (40) and a ladder opening (42), the flange opening (40) is used for being fastened and connected with the gas inlet (34) of the furnace tube assembly through bolts, and the ladder opening (42) is used for being fixedly connected with the trapezoidal connecting structure.

5. The apparatus for on-line preparation of carbon black as claimed in any one of claims 1 or 4, characterized in that: The trapezoidal connecting structure comprises a trapezoidal part (39), a sealing ring (38), a nut (43) and a threaded connection (44), the trapezoidal part (39) passes through the inside of the high-temperature-resistant ceramic pipe (41) and is sleeved with the sealing ring (38), the trapezoidal part (39) is kept in close contact with the ladder opening (42) through the nut (43), and the trapezoidal part (39) is provided with the threaded connection (44).

6. The apparatus for online preparation of carbon black as claimed in claim 1 wherein, The mixing chamber (19) is provided with a heat preservation layer (18) on the outer layer.

7. The apparatus for online preparation of carbon black as claimed in claim 1 wherein, The outside of the heat preservation pipeline (21) is provided with a pipeline heat preservation layer (22).

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