CN116717803A - Water jacket tube type carbon black flue gas cooler - Google Patents
Water jacket tube type carbon black flue gas cooler Download PDFInfo
- Publication number
- CN116717803A CN116717803A CN202310903466.1A CN202310903466A CN116717803A CN 116717803 A CN116717803 A CN 116717803A CN 202310903466 A CN202310903466 A CN 202310903466A CN 116717803 A CN116717803 A CN 116717803A
- Authority
- CN
- China
- Prior art keywords
- heat exchange
- carbon black
- shell
- flue gas
- outer sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000006229 carbon black Substances 0.000 title claims abstract description 91
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 239000003546 flue gas Substances 0.000 title claims abstract description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000000779 smoke Substances 0.000 claims abstract description 43
- 238000004939 coking Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000000498 cooling water Substances 0.000 claims abstract description 9
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000009826 distribution Methods 0.000 claims description 4
- 239000000571 coke Substances 0.000 abstract description 4
- 238000010791 quenching Methods 0.000 description 17
- 230000000171 quenching effect Effects 0.000 description 15
- 239000004071 soot Substances 0.000 description 12
- 238000005457 optimization Methods 0.000 description 9
- 239000012530 fluid Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 5
- 229910010271 silicon carbide Inorganic materials 0.000 description 5
- 239000000919 ceramic Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000007770 graphite material Substances 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The invention discloses a water jacket tube type carbon black flue gas cooler which is provided with a vertical shell and a heat exchange tube assembly. The heat exchange tube assembly comprises a plurality of vertically distributed heat exchange tubes, the upper ends of the heat exchange tubes extend out of the upper part of the shell, the lower ends of the heat exchange tubes are arranged in the shell, and the intervals of the heat exchange tubes in the heat exchange tube assembly gradually become smaller along the flow direction of the carbon black smoke; the heat exchange tube is composed of an outer sleeve and a central tube penetrating through the inner part of the outer sleeve, two ends of the outer sleeve are closed, the upper end of the central tube extends out from the upper part of the outer sleeve and is connected to a cooling water source, a gap is formed between the lower end of the central tube and the bottom of the outer sleeve, and a steam outlet communicated to an annular gap between the outer sleeve and the central tube is arranged on the tube wall of the outer sleeve, which is positioned outside the shell. In the carbon black flue gas cooler, the high-temperature carbon black flue gas passes through the outside of the pipe, and the high-temperature anti-scaling material is coated on the outer surface of the pipe, so that the coking risk can be reduced, the long-period operation is ensured, and compared with the coking in the pipe, the carbon black flue gas cooler is more convenient to remove the coke.
Description
Technical Field
The invention relates to the technical field of carbon black flue gas cooling equipment, in particular to a water jacket tube type carbon black flue gas cooler.
Background
Furnace black is a product produced by cracking hydrocarbon feedstock rich in aromatic hydrocarbons at high temperatures. In the combustion chamber of the soot reactor, the axially entering fuel oil is completely combusted, and the resulting high temperature gas stream provides heat for the cracking of the hydrocarbon feedstock. The raw oil is atomized through a nozzle under controlled conditions (temperature and pressure) under high pressure to form ultrafine fog drops which are uniformly distributed in the throat section of the venturi tube of the reaction furnace, and the ultrafine fog drops are contacted with high-temperature combustion gas, absorbed in heat and cracked to form carbon black.
The reaction for forming carbon black is quenched with high-pressure water and terminated. The high-temperature carbon black flue gas has high temperature and heat, and heat recovery is carried out at different parts of a carbon black production line, namely a quenching boiler, a high-temperature air preheater, an online preheating boiler and a raw oil preheater, and then the carbon black flue gas enters a main bag filter. The soot fumes are filtered in a main bag filter. And finally, conveying the collected carbon black to a granulating, drying and packaging section for packaging to obtain a finished product.
The current common quenching boiler is a fire tube type boiler. The soot fumes pass downstream from the reactor through the inlet box into the mouth of the quench boiler and are distributed into the inner tube of each jacket tube, heating the cooling water in the annular space between the outer tube and the inner tube of the jacket tube and reducing the soot fumes to the required temperature. The carbon black flue gas then passes through the outlet box of the quenching boiler and leaves the quenching boiler. The cooling water of the boiler is supplied to the elliptical main pipe of each jacket pipe unit below through the down pipe of the upper steam drum, and is fed into the annular space between the outer pipe and the inner pipe of each jacket pipe. The water/steam mixture is returned to the steam drum through the upper elliptical manifold and riser and water vapor separation takes place in the steam drum.
Common quench boiler forms are described in references 1 and 2.
Reference 1: chinese patent document with publication number CN115505069a
Reference 1 discloses a quenching boiler device of a production line for producing 4 ten thousand tons of hard carbon black in one year, wherein a smoke inlet device is connected with a quenching boiler, the quenching boiler is connected with a steam drum through a rising pipe, the steam drum is connected with the quenching boiler through a falling pipe, the quenching boiler is connected with a smoke outlet device, the heat exchanger is a main part for carrying out heat cycle exchange of smoke, an inner pipe is a high-temperature smoke channel, and a water channel is arranged between an inner sleeve pipe and an outer sleeve pipe. The quenching boiler device can fully utilize the waste heat of carbon black in the production process to generate steam, and simultaneously, the quenching boiler device partially replaces the effect of quenching water, thereby achieving the advantages of saving water, improving the heat value of tail gas, protecting key equipment and the like.
Reference 2: chinese patent document with publication number CN103672833B
Reference 2 discloses a quenching type waste heat boiler, which consists of a flue gas inlet base, a heat exchange section assembly, a flue gas outlet device, a steam drum, a rising pipe and a falling pipe; the heat exchange section assembly consists of a bundling double sleeve, a lower header and an upper header; the bundling double sleeve consists of an inner pipe, an outer pipe and a distance slat; the flue gas inlet base is connected with a lower header of the heat exchange section assembly, and the flue gas outlet device is connected with an upper header of the heat exchange section assembly; the method is characterized in that: the upper header consists of a lower tube plate, an upper tube plate, an inner cylinder, an outer cylinder, a flange and an inlet of a rising pipe arranged on the outer cylinder; the upper tube plate is one circle smaller than the lower tube plate, the upper tube plate and the inner cylinder are welded to form a disc-shaped upper tube plate, the outer circle size of the disc-shaped upper tube plate is smaller than the inner circle size of the outer cylinder, and an annular space is formed by the upper tube plate and the inner cylinder; the inlets of the ascending pipes arranged on the outer cylinder face the inner cylinder and are slightly higher than the lower surface of the upper tube plate; the upper end of the outer cylinder and the upper end of the inner cylinder are welded with the flange.
However, the high-temperature carbon black smoke of the quenching boiler is in the running pipe, and coking and pipe blockage are easy to occur in the cooling process, so that the running period is shorter.
Disclosure of Invention
The invention aims to solve the technical problem that a sleeve quenching boiler is easy to coke in a high-temperature environment in the prior art, and provides a water jacket tube type carbon black flue gas cooler.
The invention solves the technical problems, and adopts the following technical scheme: a water jacket tube type carbon black flue gas cooler is provided with a vertical shell and a heat exchange tube assembly arranged in the shell;
the shell is provided with a carbon black smoke inlet and a carbon black smoke outlet;
the heat exchange tube assembly comprises a plurality of vertically distributed heat exchange tubes, the upper ends of the heat exchange tubes extend out of the upper part of the shell, the lower ends of the heat exchange tubes are arranged in the shell, and the intervals of the heat exchange tubes in the heat exchange tube assembly gradually become smaller along the flow direction of carbon black smoke;
the heat exchange tube consists of an outer sleeve and a central tube penetrating inside the outer sleeve, two ends of the outer sleeve are closed, the upper end of the central tube extends out from the upper part of the outer sleeve and is connected to a cooling water source, a gap is reserved between the lower end of the central tube and the bottom of the outer sleeve, and a steam outlet communicated to an annular gap between the outer sleeve and the central tube is arranged on the tube wall of the outer sleeve outside the shell.
As a further optimization of the water jacket tube type carbon black flue gas cooler, the invention: two carbon black smoke inlets are symmetrically arranged on the side wall of the upper portion of the shell, a carbon black smoke outlet is arranged at the bottom of the shell, and the distance between heat exchange tubes in the heat exchange tube assembly is gradually reduced from top to bottom.
As a further optimization of the water jacket tube type carbon black flue gas cooler, the invention: the side wall of the upper part of the shell is provided with a carbon black smoke inlet, the lining of the shell is provided with an annular distribution port communicated with the carbon black smoke inlet, and the space between heat exchange pipes in the heat exchange pipe assembly is gradually reduced from top to bottom.
As a further optimization of the water jacket tube type carbon black flue gas cooler, the invention: the shell is a conical shell.
As a further optimization of the water jacket tube type carbon black flue gas cooler, the invention: the lower part of the lining of the shell is provided with a reducing section.
As a further optimization of the water jacket tube type carbon black flue gas cooler, the invention: two carbon black smoke outlets are symmetrically arranged on the side wall of the upper part of the shell, a carbon black smoke inlet is arranged at the bottom of the shell, and the distance between heat exchange pipes in the heat exchange pipe assembly is gradually increased from top to bottom.
As a further optimization of the water jacket tube type carbon black flue gas cooler, the invention: the lining of the shell is a high-temperature resistant lining, and a plurality of annular baffling tables are arranged on the lining from top to bottom.
As a further optimization of the water jacket tube type carbon black flue gas cooler, the invention: the outer wall of the outer sleeve is sprayed with a high-temperature anti-coking material.
As a further optimization of the water jacket tube type carbon black flue gas cooler, the invention: the outer wall of the outer sleeve is provided with longitudinal fins.
As a further optimization of the water jacket tube type carbon black flue gas cooler, the invention: the heat exchange tube assembly further comprises a heat exchange tube supporting assembly, and the lower end of the outer sleeve of the heat exchange tube is fixed on the heat exchange tube supporting assembly.
The invention has the following beneficial effects:
1. in the carbon black flue gas cooler, the high-temperature carbon black flue gas passes through the outside of the pipe, and the high-temperature anti-scaling material is coated on the outer surface of the pipe, so that the coking risk can be reduced, the long-period operation is ensured, and compared with the coking in the pipe, the carbon black flue gas cooler is more convenient to remove the coke;
2. the shell side lining of the carbon black flue gas cooler is provided with a plurality of annular baffling tables, and the annular baffling tables can improve turbulence of carbon black flue gas;
3. in the carbon black flue gas cooler, the intervals of the heat exchange pipes are gradually encrypted along the flow direction (the cooling direction) of high-temperature flue gas, so that the flue gas flow velocity between the heat exchange pipes is uniform and stable, and a flue gas low-speed region is eliminated. The flue gas temperature decreases and the volume decreases, and if the tube spacing is equidistant in the flow direction, the flow rate decreases. By adopting the invention, the heat exchange efficiency can be improved by improving the flow velocity of the flue gas in the cooling process, so that the wall temperature of the heat exchange tube along the length direction is uniform, and the coking risk is reduced; and the coke powder can be taken away, the possibility of coke powder deposition is reduced, and coking is not easy to occur.
Drawings
FIG. 1 is a schematic view of the internal structure of a soot flue gas cooler (straight cylinder housing) of the present invention;
FIG. 2 is a schematic view of the internal structure of the soot flue gas cooler (conical shell) of the present invention;
FIG. 3 is a schematic diagram of the internal structure of the soot flue gas cooler (straight cylinder housing, double flue gas inlets, upper inlet and lower outlet of flue gas) of the present invention;
FIG. 4 is a schematic view of the heat exchange tube of the carbon black flue gas cooler according to the present invention;
FIG. 5 is an enlarged schematic view of the structure shown at A in FIG. 4;
FIG. 6 is a schematic diagram of the internal structure of the soot flue gas cooler (straight cylinder housing, double flue gas outlets, lower inlet and upper outlet of flue gas) of the present invention;
the marks in the figure:
1. a housing;
101a, carbon black flue gas inlet;
102a, a carbon black flue gas outlet;
101b, carbon black flue gas inlet;
102b, a carbon black flue gas outlet;
103. an annular distribution port;
104. an annular baffle table;
2. a heat exchange tube;
201. an outer sleeve;
202. a central tube;
203. and the heat exchange tube support assembly.
Detailed Description
For a better understanding of the present invention, the following examples are set forth to illustrate, but are not to be construed as limiting the invention.
As shown in the figure: a water jacket tube type soot flue gas cooler has a vertical housing 1 and a heat exchange tube assembly disposed within the housing 1.
The shell 1 is cylindrical in structural form, and a carbon black smoke inlet 101 and a carbon black smoke outlet 102 are arranged on the shell 1. The shell 1 can be made of carbon steel or stainless steel, the lining of the shell 1 is a high-temperature-resistant lining, and the common high-temperature-resistant lining materials are as follows:
ceramic: the ceramic material has excellent high temperature resistance and corrosion resistance, and alumina ceramic, silicon carbide ceramic, silicon nitride ceramic brick or casting material and other materials are generally used as the high temperature resistant lining.
Graphite: graphite has excellent high temperature resistance and heat conduction performance, and a graphite material is generally used as a high temperature resistant lining.
Silicon carbide: silicon carbide materials have excellent high temperature resistance and corrosion resistance, and are generally used as high temperature resistant liners.
The specific structural form of the housing 1 may be a straight cylindrical housing (as shown in fig. 1) or a conical housing (as shown in fig. 2). When the casing 1 is a straight cylindrical casing, the lower part of the liner of the casing 1 is provided with a reduced diameter section.
The heat exchange tube assembly comprises a plurality of heat exchange tubes 2 which are vertically distributed, the upper ends of the heat exchange tubes 2 extend out of the upper part of the shell 1, the lower ends of the heat exchange tubes 2 are arranged in the shell 1, and the intervals of the heat exchange tubes 2 in the heat exchange tube assembly are gradually reduced along the flow direction of carbon black smoke.
The heat exchange tube 2 is composed of an outer sleeve 201 and a central tube 202 penetrating inside the outer sleeve 201, two ends of the outer sleeve 201 are closed, the upper end of the central tube 202 extends out of the upper portion of the outer sleeve 201 and is connected to a cooling water source, a gap is reserved between the lower end of the central tube 202 and the bottom of the outer sleeve 201, and a steam outlet communicated to an annular gap between the outer sleeve 201 and the central tube 202 is arranged on a tube wall of the outer sleeve 201 outside the shell 1.
It should be noted that the heat exchange tube assembly further includes a heat exchange tube support assembly 203, the lower end of the outer sleeve 201 of the heat exchange tube 2 is fixed on the heat exchange tube support assembly 203, and the heat exchange tube 2 can be fixed at the inner position of the housing 1 through the heat exchange tube support assembly 203.
The cooling water source is usually a steam drum, the downcomers of which are in communication with the central tube 202 of the heat exchange tube 2, and the steam outlets of the outer jacket 201 are connected to the steam drum via ascending tubes.
Regarding the arrangement positions of the carbon black flue gas inlet 101 and the carbon black flue gas outlet 102, two main cases are:
the first arrangement is: as shown in fig. 3, the soot smoke inlet 101a is provided at the upper portion of the housing 1, the soot smoke outlet 102a is provided at the lower portion of the housing 1, and the arrangement form of the soot smoke inlet 101a can be also divided into two types:
two carbon black smoke inlets 101a are symmetrically arranged on the side wall of the upper portion of the shell 1, a carbon black smoke outlet 102a is arranged at the bottom of the shell 1, and the distance between the heat exchange tubes 2 in the heat exchange tube assembly is gradually reduced from top to bottom.
Or the upper side wall of the shell 1 is provided with a carbon black smoke inlet, the lining of the shell 1 is provided with annular distribution openings 103 communicated with the carbon black smoke inlet, and the interval between the heat exchange tubes 2 in the heat exchange tube assembly is gradually reduced from top to bottom (not shown in the figure).
The second arrangement is: as shown in fig. 6, two carbon black smoke outlets 102b are symmetrically arranged on the side wall of the upper part of the shell 1, a carbon black smoke inlet 101b is arranged at the bottom of the shell 1, and the distance between the heat exchange tubes 2 in the heat exchange tube assembly is gradually increased from top to bottom.
Of course, in this configuration, the upper portion of the casing 1 is preferably provided in a reduced diameter configuration, so that the space (not shown) between the peripheral heat exchange tube 2 and the inner wall of the casing 1 is reduced.
The flow direction of the carbon black smoke is determined by the setting positions of the carbon black smoke inlet and the carbon black smoke outlet, so that the setting of the heat exchange tube 2 is required to be correspondingly adjusted according to the difference of the setting positions of the carbon black smoke inlet and the carbon black smoke outlet, and the requirement that the distance between the heat exchange tubes 2 in the heat exchange tube assembly is gradually reduced along the flow direction of the carbon black smoke is met.
A plurality of annular baffling tables 104 are arranged on the lining of the shell 1 from top to bottom, and the annular baffling tables 104 can improve the turbulence degree of the carbon black smoke and improve the heat exchange effect.
Turbulence may increase heat exchange efficiency relative to laminar flow. Turbulence is a state of flow of a fluid. When the flow velocity is small, the fluids flow in layers and are not mixed with each other, and the fluid is called laminar flow and is also called steady flow or laminar flow; gradually increasing the flow rate, the streamline of the fluid begins to oscillate in a wave shape, and the frequency and amplitude of the oscillation increase with the increase of the flow rate, and the flow condition is called transitional flow; when the flow rate increases to a great level, the flow lines are no longer clearly discernable, many small eddies are present in the flow field, the laminar flow is broken, and not only is there slippage but also mixing between adjacent flow layers. The fluid is in irregular motion and has a component velocity perpendicular to the axis of the flow tube, and this motion is called turbulence, also called turbulence, turbulence or turbulence.
After the fluid flows in a turbulent flow, turbulent heat transfer can be generated, various quantities in the flow field are changed in a turbulent way along with time and space coordinates due to irregular movement of particles of the fluid, so that the temperature difference between the center of the tube and the wall of the tube is small, and the heat exchange efficiency is improved compared with that of laminar heat transfer.
The outer wall of the outer sleeve 201 is sprayed with a high-temperature anti-coking material, and the high-temperature anti-coking material comprises ceramics, metal, graphite, silicon carbide and the like. The materials have good high temperature resistance and chemical stability, and can effectively prevent coking and corrosion. The ceramic material has good corrosion resistance and mechanical strength, but has higher cost; the metal material has good heat conduction performance and mechanical strength, but is easy to corrode and oxidize; the graphite material has good corrosion resistance and heat conduction performance, but is easy to be damaged mechanically; the silicon carbide material has good high temperature resistance and corrosion resistance, but has higher cost. When the high-temperature anti-coking material is selected, the factors such as performance, cost and use environment are comprehensively considered.
The outer wall of the outer sleeve 201 is provided with longitudinal fins which increase the heat exchange surface area, typically made of a metallic material. The function of the fins is to increase the heat transfer efficiency of the heat exchanger so that heat can be transferred more quickly into the working medium of the heat exchanger. Meanwhile, the fins can also increase the heat transfer area of the heat exchanger, so that the heat exchange efficiency of the heat exchanger is improved.
As shown in fig. 1, the high-temperature carbon black flue gas enters the shell 1 from the upper part of the shell 1 and flows downwards in the shell 1, and exchanges heat with cooling water in the heat exchange tube 2 in the flue gas flowing process to reduce the temperature of the flue gas, so that the cooling water in the heat exchange tube 2 absorbs heat to be converted into water vapor, and the water vapor rises along an annular gap between the outer sleeve 201 and the central tube 202 and is discharged from a vapor outlet to enter a steam drum.
In the carbon black flue gas cooler, the high-temperature carbon black flue gas passes through the outside of the pipe, and the high-temperature anti-scaling material is coated on the outer surface of the pipe, so that the coking risk can be reduced, the long-period operation is ensured, and compared with the coking in the pipe, the carbon black flue gas cooler is more convenient to remove the coke.
The foregoing describes specific embodiments of the present invention. It is to be understood that the invention is not limited to the particular embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the claims without affecting the spirit of the invention.
Claims (10)
1. A water jacket tube type carbon black flue gas cooler is characterized in that: the heat exchange tube assembly comprises a vertical shell (1) and a heat exchange tube assembly arranged in the shell (1);
the shell (1) is provided with a carbon black smoke inlet (101) and a carbon black smoke outlet (102);
the heat exchange tube assembly comprises a plurality of heat exchange tubes (2) which are vertically distributed, the upper ends of the heat exchange tubes (2) extend out from the upper part of the shell (1), the lower ends of the heat exchange tubes (2) are arranged in the shell (1), and the intervals of the heat exchange tubes (2) in the heat exchange tube assembly are gradually reduced along the flow direction of carbon black smoke;
the heat exchange tube (2) is composed of an outer sleeve (201) and a central tube (202) penetrating through the inner portion of the outer sleeve, two ends of the outer sleeve (201) are closed, the upper end of the central tube (202) extends out of the upper portion of the outer sleeve (201) and is connected to a cooling water source, a gap is reserved between the lower end of the central tube (202) and the bottom of the outer sleeve (201), and a steam outlet communicated to an annular gap between the outer sleeve (201) and the central tube (202) is arranged on a tube wall of the outer sleeve (201) outside the shell (1).
2. The water jacket tube carbon black flue gas cooler of claim 1, wherein: two carbon black smoke inlets (101) are symmetrically arranged on the side wall of the upper portion of the shell (1), a carbon black smoke outlet (102) is arranged at the bottom of the shell (1), and the distance between the heat exchange tubes (2) in the heat exchange tube assembly is gradually reduced from top to bottom.
3. The water jacket tube carbon black flue gas cooler of claim 1, wherein: the side wall of the upper part of the shell (1) is provided with a carbon black smoke inlet (101), the lining of the shell (1) is provided with annular distribution openings (103) communicated with the carbon black smoke inlet (101), and the distance between the heat exchange tubes (2) in the heat exchange tube assembly is gradually reduced from top to bottom.
4. A water jacket tube carbon black flue gas cooler according to claim 2 or 3, wherein: the shell (1) is a conical shell (1).
5. A water jacket tube carbon black flue gas cooler according to claim 2 or 3, wherein: the lower part of the lining of the shell (1) is provided with a reducing section.
6. The water jacket tube carbon black flue gas cooler of claim 1, wherein: two carbon black smoke outlets (102) are symmetrically arranged on the side wall of the upper portion of the shell (1), a carbon black smoke inlet (101) is arranged at the bottom of the shell (1), and the distance between the heat exchange tubes (2) in the heat exchange tube assembly is gradually increased from top to bottom.
7. The water jacket tube carbon black flue gas cooler of claim 1, wherein: the lining of the shell (1) is a high-temperature resistant lining, and a plurality of annular baffle tables (104) are arranged on the lining from top to bottom.
8. The water jacket tube carbon black flue gas cooler of claim 1, wherein: the outer wall of the outer sleeve (201) is sprayed with a high-temperature anti-coking material.
9. The water jacket tube carbon black flue gas cooler of claim 1, wherein: the outer wall of the outer sleeve (201) is provided with longitudinal fins.
10. The water jacket tube carbon black flue gas cooler of claim 1, wherein: the heat exchange tube assembly further comprises a heat exchange tube supporting assembly (203), and the lower end of the outer sleeve (201) of the heat exchange tube (2) is fixed on the heat exchange tube supporting assembly (203).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310903466.1A CN116717803A (en) | 2023-07-22 | 2023-07-22 | Water jacket tube type carbon black flue gas cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310903466.1A CN116717803A (en) | 2023-07-22 | 2023-07-22 | Water jacket tube type carbon black flue gas cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116717803A true CN116717803A (en) | 2023-09-08 |
Family
ID=87868099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310903466.1A Pending CN116717803A (en) | 2023-07-22 | 2023-07-22 | Water jacket tube type carbon black flue gas cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116717803A (en) |
-
2023
- 2023-07-22 CN CN202310903466.1A patent/CN116717803A/en active Pending
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