CN209655881U - A kind of multistage rising heat exchange of heat pipe - Google Patents
A kind of multistage rising heat exchange of heat pipe Download PDFInfo
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- CN209655881U CN209655881U CN201920139186.7U CN201920139186U CN209655881U CN 209655881 U CN209655881 U CN 209655881U CN 201920139186 U CN201920139186 U CN 201920139186U CN 209655881 U CN209655881 U CN 209655881U
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Classifications
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A kind of multistage rising heat exchange of heat pipe, belongs to metallurgical industry heat recovery technology field.The multistage rising heat exchange of heat pipe, including first-class heat exchanger, secondary heat exchanger, shell and temperature control working medium flow feedback regulator, first-class heat exchanger and secondary heat exchanger are arranged at the multistage inside for rising heat exchange of heat pipe, the top of first-class heat exchanger is equipped with sender property outlet one, the lower part of first-class heat exchanger is equipped with working medium entrances one, the top of secondary heat exchanger is equipped with sender property outlet two, the lower part of secondary heat exchanger is equipped with working medium entrances two, temperature control working medium flow feedback regulator includes upper thermocouple one, lower thermocouple one, upper thermocouple two, lower thermocouple two, PLC control module, electric control valve one and electric control valve two, the PLC control module includes PLC processor one and PLC processor two.The multistage rising heat exchange of heat pipe, can sufficiently recycle coal oven dithio-gas high-temperature residual heat, improve the heat exchange efficiency for rising heat exchange of heat pipe, and guaranteeing that raw gas temperature will not be reduced excessively causes tar to condense.
Description
Technical Field
The utility model relates to a metallurgical industry waste heat recovery technical field, in particular to multistage tedge heat exchanger.
Background
The coke oven crude gas is a high-temperature corrosive gas which has high temperature and corrosiveness and contains a large amount of tar. The existing riser heat exchanger is generally a single-stage heat exchanger and has three structures of a single-layer water jacket, a single-stage built-in heat exchange coil and a single-stage external heat exchange coil. The reason that the heat exchange efficiency of the existing single-stage heat exchanger is not high is that the production cycle of a carbonization chamber of a coke oven is usually 20-24 hours, the flow rate of crude gas is large and the flow speed is high in the early 15 hours, the crude gas heat close to a heat exchange surface can be recovered, but the crude gas in the center of the riser can quickly flow out of the riser without sufficient heat exchange, enters a bridge pipe and is sprayed with ammonia water for cooling, and the crude gas heat in the riser heat exchanger is not fully utilized.
Disclosure of Invention
In order to solve the technical problem that single-stage heat exchanger heat exchange efficiency that prior art exists is not high, coke oven raw coke oven gas high temperature waste heat recovery is not abundant, excessive cooling leads to tar to condense etc, the utility model provides a multistage tedge heat exchanger can fully retrieve coke oven raw coke oven gas high temperature waste heat, especially retrieves tedge central authorities, peripheral raw coke oven gas high temperature waste heat simultaneously 15 hours before coke oven production, improves the heat exchange efficiency of tedge heat exchanger, makes the raw coke oven gas heat obtain make full use of, guarantees simultaneously that the raw coke oven gas temperature can not excessively reduce and lead to tar to condense.
In order to realize the purpose, the technical scheme of the utility model is that:
a multi-stage ascending pipe heat exchanger comprises a first-stage heat exchanger, a second-stage heat exchanger, a shell and a temperature control working medium flow feedback regulator;
the upper part of the shell is provided with an upper flange, and the lower part of the shell is provided with a lower flange;
the primary heat exchanger and the secondary heat exchanger are both arranged inside the multistage ascending pipe heat exchanger, the primary heat exchanger is close to the shell of the multistage ascending pipe heat exchanger, the secondary heat exchanger is close to the center of the multistage ascending pipe heat exchanger, a first working medium outlet is formed in the upper portion of the primary heat exchanger, a first working medium inlet is formed in the lower portion of the primary heat exchanger, a second working medium outlet is formed in the upper portion of the secondary heat exchanger, and a second working medium inlet is formed in the lower portion of the secondary heat exchanger;
the temperature control working medium flow feedback regulator comprises an upper thermocouple I, a lower thermocouple I, an upper thermocouple II, a lower thermocouple II, a PLC control module, an electric regulating valve I and an electric regulating valve II, the PLC control module comprises a first PLC processor and a second PLC processor, the upper part of the primary heat exchanger is provided with a first upper thermocouple, the lower part of the primary heat exchanger is provided with a first lower thermocouple, the upper part of the secondary heat exchanger is provided with an upper thermocouple II, the lower part of the secondary heat exchanger is provided with a lower thermocouple II, the upper thermocouple I and the lower thermocouple I are both connected with a PLC processor, the upper thermocouple II and the lower thermocouple II are both connected with a PLC processor II, the first working medium inlet is provided with a first electric regulating valve, the second working medium inlet is provided with a second electric regulating valve, the first electric regulating valve is connected with the first PLC processor, and the second electric regulating valve is connected with the second PLC processor.
The one-level heat exchanger adopts the heat transfer coil structure of taking protective case or adopts outer coil structure, when the one-level heat exchanger adopts the heat transfer coil structure of taking protective case, the one-level heat exchanger includes heat transfer coil one, be equipped with heat transfer working medium in the heat transfer coil one, heat transfer coil one is equipped with protective case outward, be equipped with heat-conducting medium between heat transfer coil one and the protective case, when the one-level heat exchanger adopts outer coil structure, the one-level heat exchanger includes outer coil, steel cylinder one and steel cylinder two are the cylinder tubular construction, and set up respectively the both sides of outer coil, be equipped with heat transfer working medium in the outer coil, the outer coil is equipped with heat-conducting medium outward.
The secondary heat exchanger adopts a heat exchange coil structure with a protective sleeve, the secondary heat exchanger comprises a second heat exchange coil, heat exchange working media are arranged in the second heat exchange coil, the protective sleeve is arranged outside the second heat exchange coil, and a heat conducting medium is arranged between the second heat exchange coil and the protective sleeve.
The shell is made of steel plates, and an expansion joint is arranged in the middle of the outer portion of the shell.
The inner wall of shell is equipped with heat insulation layer or heat preservation, the heat insulation layer includes heat reflection glaze and flame retardant coating, the heat reflection glaze sets up the one side of being close to the one-level heat exchanger, the material of heat preservation adopts refractory fiber.
The fire-resistant layer is formed by annularly cutting refractory bricks or pouring refractory materials, and the heat reflection glaze surface is sprayed by high-temperature-resistant ceramics.
The PLC control module controls the opening of the electric control valve I and the opening of the electric control valve II according to a set value of the gas temperature in the multi-stage ascending pipe heat exchanger, wherein the PLC processor controls the opening of the electric control valve I according to the set value of the gas temperature in the first-stage heat exchanger, and the PLC processor controls the opening of the electric control valve II according to the set value of the gas temperature in the second-stage heat exchanger.
The heat conducting medium is one or more of silicon carbide, aluminum nitride, graphite powder, graphene, zinc oxide, boron nitride, steel powder, aluminum powder solid powder and liquid metal, and the protective sleeve is a heat-resistant stainless steel pipe or a ceramic sintering pipeline.
The heat conducting medium is one or more of silicon carbide, aluminum nitride, graphite powder, graphene, zinc oxide, boron nitride, steel powder, aluminum powder solid powder and liquid metal, and the protective sleeve is a heat-resistant stainless steel pipe or a ceramic sintering pipeline.
The primary heat exchanger and the secondary heat exchanger are connected in series or in parallel.
The utility model has the advantages that:
the utility model discloses a multistage tedge heat exchanger can fully retrieve coke oven raw coke oven gas high temperature waste heat, especially retrieves tedge heat exchanger central authorities, peripheral raw coke oven gas high temperature waste heat simultaneously 15 hours before coke oven production, improves the heat exchange efficiency of tedge heat exchanger, makes the raw coke oven gas heat obtain make full use of, and simultaneously, control by temperature change working medium flow feedback regulator prevents the tar condensation phenomenon that the excessive reduction of raw coke oven gas temperature leads to.
Drawings
Fig. 1 is a schematic structural view of a multi-stage ascending pipe heat exchanger when the primary heat exchanger provided by the present invention adopts a heat exchange coil structure with a protective sleeve;
fig. 2 is a schematic structural diagram of the primary heat exchanger when the primary heat exchanger adopts a heat exchange coil structure with a protective sleeve;
fig. 3 is a schematic structural diagram of a secondary heat exchanger provided by the present invention;
fig. 4 is a schematic structural diagram of a first heat exchange coil when the first-stage heat exchanger provided by the present invention adopts a heat exchange coil structure with a protective sleeve;
fig. 5 is a schematic structural view of a multi-stage ascending pipe heat exchanger when the primary heat exchanger provided by the present invention adopts an outer coil structure;
fig. 6 is a schematic structural diagram of the one-level heat exchanger when the one-level heat exchanger adopts an outer coil structure.
Wherein,
1-a primary heat exchanger, 2-a secondary heat exchanger, 3-an upper thermocouple I, 4-an upper thermocouple II, 5-an upper flange, 6-a lower flange, 7-a shell, 8-a heat reflection glaze, 9-a fire-resistant layer, 10-an expansion joint, 11-an electric control valve I, 12-an electric control valve II, 13-a working medium inlet I, 14-a working medium inlet II, 15-a lower thermocouple I, 16-a lower thermocouple II, 17-a working medium outlet II, 18-a working medium outlet I, 19-a PLC processor I, 20-a PLC processor II, 21-an upright post bracket I, 22-a heat exchange coil I, 23-an upright post bracket II, 24-a heat exchange coil II, 25-a protective sleeve, 26-a heat-conducting medium and 27-a heat preservation layer, 28-heat exchange working medium, 29-PLC control module, 30-steel cylinder I, 31-outer coil pipe and 32-steel cylinder II.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "two," "first," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," and may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In order to solve the problems in the prior art, as shown in fig. 1 to 6, the utility model provides a multistage ascending tube heat exchanger, which comprises a primary heat exchanger 1, a secondary heat exchanger 2, a shell 7 and a temperature control working medium flow feedback regulator;
the upper part of the shell 7 is provided with an upper flange 5, and the lower part of the shell 7 is provided with a lower flange 6;
one-level heat exchanger 1 and second grade heat exchanger 2 all set up the inside at multistage tedge heat exchanger, and one-level heat exchanger 1 is close to multistage tedge heat exchanger's shell 7, and second grade heat exchanger 2 is close to multistage tedge heat exchanger's central authorities, and one-level heat exchanger 1's upper portion is equipped with working medium export 18, and one-level heat exchanger 1's lower part is equipped with working medium entry 13, and second grade heat exchanger 2's upper portion is equipped with working medium export two 17, and second grade heat exchanger 2's lower part is equipped with working medium entry two 14, the utility model discloses in, one-level heat exchanger 1 is close to multistage tedge heat exchanger's shell 7 and is used for retrieving the air current heat energy in the peripheral high temperature raw coke oven gas passageway of multistage tedge heat exchanger, and second grade heat exchanger 2.
The temperature control working medium flow feedback regulator comprises an upper thermocouple I3, a lower thermocouple I15, an upper thermocouple II 4, a lower thermocouple II 16, a PLC control module 29, an electric regulating valve I11 and an electric regulating valve II 12, the PLC control module 29 comprises a PLC processor I19 and a PLC processor II 20, the upper part of a primary heat exchanger 1 is provided with the upper thermocouple I3, the upper thermocouple I3 is used for recording the outlet temperature of a peripheral high-temperature crude gas channel, the lower part of the primary heat exchanger 1 is provided with the lower thermocouple I15, the lower thermocouple I15 is used for recording the inlet temperature of the peripheral high-temperature crude gas channel, the upper part of a secondary heat exchanger 2 is provided with the upper thermocouple II 4, the upper thermocouple II 4 is used for recording the outlet temperature of a central high-temperature crude gas channel, the lower part of the secondary heat exchanger 2 is provided with the lower thermocouple II 16, and the lower thermocouple II 16 is used for recording the inlet temperature of the central high-temperature, go up thermocouple 3 and couple 15 all is connected with PLC treater 19 down, go up thermocouple two 4 and couple two 16 all are connected with PLC treater two 20 down, and working medium entry 13 is equipped with electric control valve 11, and working medium entry two 14 are equipped with electric control valve two 12, and electric control valve 11 is connected with PLC treater 19, and electric control valve two 12 is connected with PLC treater two 20. The upper thermocouple I3 and the lower thermocouple I15 both output 4-20 mA signals to enter a PLC processor I19, the model of the PLC processor I19 is Siemens S7-200smart SR30, new 4-20 mA signals are output to an electric control valve actuator through step7 program calculation, the opening of the electric control valve I11 is controlled, the working medium flow of the primary heat exchanger 1 is adjusted, the upper thermocouple II 4 and the lower thermocouple II 16 both output 4-20 mA signals to enter a PLC processor II 20, the model of the PLC processor II 20 is Siemens S7-200smart SR30, new 4-20 mA signals are output to the electric control valve actuator through step7 program calculation, the opening of the electric control valve II 12 is controlled, and the working medium flow of the secondary heat exchanger 2 is adjusted.
One-level heat exchanger 1 adopts the heat transfer coil structure of taking protective sleeve 25 or adopts outer coil pipe 31 structure, when one-level heat exchanger 1 adopted the heat transfer coil structure of taking protective sleeve 25, one-level heat exchanger 1 includes heat transfer coil pipe 22, be equipped with heat transfer working medium 28 in heat transfer coil pipe 22, heat transfer coil pipe 22 is equipped with protective sleeve 25 outward, be equipped with heat-conducting medium 26 between heat transfer coil pipe 22 and the protective sleeve 25, when one-level heat exchanger 1 adopted outer coil pipe 31 structure, one-level heat exchanger 1 includes outer coil pipe 31, first steel cylinder 30 and second steel cylinder 32 are the cylinder tube structure, and set up the both sides at outer coil pipe 31 respectively, be equipped with heat transfer working medium 28 in the outer coil pipe 31, outer coil pipe 31 is equipped with heat-conducting. The secondary heat exchanger 2 is of a heat exchange coil structure with a protective sleeve 25, the secondary heat exchanger 2 comprises a second heat exchange coil 24, a heat exchange working medium 28 is arranged in the second heat exchange coil 24, the protective sleeve 25 is arranged outside the second heat exchange coil 24, and a heat conducting medium 26 is arranged between the second heat exchange coil 24 and the protective sleeve 25.
In the utility model, as shown in fig. 4, when the primary heat exchanger 1 adopts a heat exchange coil structure with a protective sleeve 25, the primary heat exchanger 1 and the secondary heat exchanger 2 have the same structure, the primary heat exchanger 1 is arranged on the first upright support 21, the secondary heat exchanger 2 is arranged on the second upright support 23, as shown in fig. 1-3, the first upright support 21 and the second upright support 23 are both made of high temperature resistant stainless steel, the first upright support 21 and the second upright support 23 are both arranged in the multi-stage ascending pipe heat exchanger, the primary heat exchanger 1 is connected with the first upright support 21, the first upright support 21 is used for supporting the primary heat exchanger 1, the secondary heat exchanger 2 is connected with the second upright support 23, the second upright support 23 is used for supporting the secondary heat exchanger 2, the working medium 28 is uniformly fed in the first heat exchange coil 22 and the second heat exchange coil 24, the protective sleeve 25 is arranged outside the first heat exchange coil 22 and, for preventing high temperature corrosion; as shown in fig. 5 and 6, when the primary heat exchanger 1 adopts the structure of the external coil 31, the upper ends of the first steel cylinder 30 and the second steel cylinder 32 are both connected with the upper flange 5, the lower ends of the first steel cylinder 30 and the second steel cylinder 32 are both connected with the lower flange 6, and the heat conducting medium 26 is located between the first steel cylinder 30 and the second steel cylinder 32 and outside the external coil 31.
The heat conducting medium 26 is one or more of silicon carbide, aluminum nitride, graphite powder, graphene, zinc oxide, boron nitride, steel powder, aluminum powder solid powder and liquid metal, the protective sleeve 25 is a heat-resistant stainless steel pipe or a ceramic sintering pipeline, the primary heat exchanger 1 and the secondary heat exchanger 2 are connected in series or in parallel, the shell 7 is made of a steel plate, the middle of the outer part of the shell 7 is provided with an expansion joint 10, the inner wall of the shell 7 is provided with a heat insulating layer or a heat insulating layer 27, when the primary heat exchanger 1 adopts a heat exchange coil structure with the protective sleeve 25, the inner wall of the shell 7 is provided with the heat insulating layer which is used for isolating heat inside the multi-stage riser heat exchanger, the heat insulating layer comprises a heat reflecting glaze layer 8 and a fire-resistant layer 9, the heat reflecting glaze layer 8 is arranged at one side close to the primary heat exchanger 1, the fire-resistant layer 9 is annularly cut by adopting refractory bricks or, when the first-stage heat exchanger 1 adopts an outer coil pipe 31 structure, the inner wall of the shell 7 is provided with an insulating layer 27, the insulating layer 27 is made of refractory fiber and used for reducing heat loss in the multi-stage riser heat exchanger, the PLC control module 29 controls the opening degrees of the electric control valve I and the electric control valve II according to the set value of the gas temperature in the multi-stage riser heat exchanger, the set value of the gas temperature is higher than 380 ℃, wherein the PLC processor I19 controls the opening degree of the electric control valve I according to the set value of the gas temperature in the first-stage heat exchanger 1, namely the lower thermocouple I15 records the inlet temperature of the peripheral high-temperature raw gas channel, the upper thermocouple I3 records the outlet temperature of the peripheral high-temperature raw gas channel, the PLC processor I19 controls the opening degree of the electric control valve I11, the working medium flow of the first-stage heat exchanger 1 is adjusted, the, the tar is prevented from being condensed; the PLC processor II 20 controls the opening of the electric control valve II according to a set value of the gas temperature in the secondary heat exchanger 2, namely the lower thermocouple II 16 records the inlet temperature of the central high-temperature raw gas channel, the upper thermocouple II 4 records the outlet temperature of the central high-temperature raw gas channel, the PLC processor II 20 controls the opening of the electric control valve II 12 to adjust the working medium flow of the secondary heat exchanger 2, the gas temperature in the central high-temperature raw gas channel is guaranteed to be higher than 380 ℃, and tar condensation is prevented.
The utility model discloses in, as shown in fig. 1, shell 7 is the cylinder structure, and shell 7 adopts the steel sheet to make, and expansion joint 10 is used for dealing with the equipment and warp, and heat reflection glaze 8 adopts high temperature resistant ceramic spraying, can improve 1 waste heat recovery efficiency of one-level heat exchanger with raw coke oven gas surrounding radiant heat to 1 reflection of one-level heat exchanger. As shown in fig. 1, the area B is a peripheral high-temperature raw gas channel between the primary heat exchanger 1 and the secondary heat exchanger 2, the area a is a central high-temperature raw gas channel in the middle of the secondary heat exchanger 2, the upper thermocouple 1 and the lower thermocouple 15 are both arranged on the housing 7 and both penetrate through the housing 7 to be connected with the PLC processor 19, and the upper thermocouple 4 and the lower thermocouple 16 are both arranged on the housing 7 and both penetrate through the housing 7 to be connected with the PLC processor 20.
The working process of the multistage ascending pipe heat exchanger is as follows:
(1) when the primary heat exchanger 1 is connected with the secondary heat exchanger 2 in series, a first working medium outlet 18 of the primary heat exchanger 1 is connected with a second working medium inlet 14 of the secondary heat exchanger 2 through an external pipeline, so that a heat exchange working medium 28 enters the primary heat exchanger 1 through a first working medium inlet 13, then flows out from a second working medium outlet 17 through the first working medium outlet 18 and the second working medium inlet 14, a lower thermocouple 15 records the inlet temperature of a peripheral high-temperature raw gas channel, an upper thermocouple 3 records the outlet temperature of the peripheral high-temperature raw gas channel, the lower thermocouple 15 and the upper thermocouple 3 convert the temperature into electric signals, 4-20 mA signals are output into a first PLC processor 19, the PLC processor 19 is of a type S7-200smart SR30, new 4-20 mA signals are output to an electric control valve actuator through a step7 program, the opening of the electric control valve 11 is controlled, and the flow of the primary heat exchanger 1 is adjusted, the gas temperature in the peripheral high-temperature raw gas channel is ensured to be higher than 380 ℃, and tar is prevented from being condensed; then, the lower thermocouple II 16 records the inlet temperature of the central high-temperature raw gas channel, the upper thermocouple II 4 records the outlet temperature of the central high-temperature raw gas channel, the lower thermocouple II 16 and the upper thermocouple II 4 convert the temperatures into electric signals and output 4-20 mA signals into the PLC processor II 20, the PLC processor II 20 is of a Siemens S7-200smart SR30 model, new 4-20 mA signals are output to an electric regulating valve actuator through step7 program calculation, the opening of the electric regulating valve II 12 is controlled, the working medium flow of the secondary heat exchanger 2 is regulated, the temperature of the gas in the central high-temperature raw gas channel is guaranteed to be higher than 380 ℃, and tar condensation is prevented.
(2) When the primary heat exchanger 1 is connected with the secondary heat exchanger 2 in parallel, one part of a heat exchange working medium 28 enters the primary heat exchanger 1 for heat exchange through a first working medium inlet 13, the other part of the heat exchange working medium enters the secondary heat exchanger 2 for heat exchange through a second working medium inlet 14, a lower thermocouple 15 records the inlet temperature of a peripheral high-temperature raw gas channel, an upper thermocouple 3 records the outlet temperature of the peripheral high-temperature raw gas channel, the lower thermocouple 15 and the upper thermocouple 3 convert the temperature into electric signals and output 4-20 mA signals into a PLC (programmable logic controller) processor 19 respectively, the PLC processor 19 is provided with a Siemens S7-200smart SR30 in a model, a new 4-20 mA signal is calculated and output to an electric regulating valve actuator through a step7 program, the opening of the electric regulating valve I11 is controlled, the working medium flow of the primary heat exchanger 1 is regulated, the temperature of the gas in the peripheral high-temperature raw gas channel is higher than 380 ℃; meanwhile, the lower thermocouple II 16 records the inlet temperature of the central high-temperature raw gas channel, the upper thermocouple II 4 records the outlet temperature of the central high-temperature raw gas channel, the lower thermocouple II 16 and the upper thermocouple II 4 convert the temperatures into electric signals and output 4-20 mA signals into the PLC processor II 20, the PLC processor II 20 is of a Siemens S7-200smart SR30 model, new 4-20 mA signals are output to an electric regulating valve actuator through step7 program calculation, the opening of the electric regulating valve II 12 is controlled, the working medium flow of the secondary heat exchanger 2 is regulated, the temperature of the gas in the central high-temperature raw gas channel is guaranteed to be higher than 380 ℃, and tar condensation is prevented.
Example one
A7 m large-scale coke oven raw gas waste heat utilization project adopts a multi-stage ascending tube heat exchanger, a primary heat exchanger 1 and a secondary heat exchanger 2 are connected in series for use, a heat exchange working medium 28 firstly enters the primary heat exchanger 1 for heat exchange and then enters the secondary heat exchanger 2 for heat exchange to produce saturated steam for use, the heat exchange working medium 28 adopts desalted water, and the desalted water enters the primary heat exchanger 1 for heat exchange and then enters the secondary heat exchanger 2 for heat exchange. The first heat exchange coil 22 and the second heat exchange coil 24 are both made of 304 stainless steel pipes, the heat conducting medium 26 is made of aluminum nitride powder or liquid metal, the protective sleeve 25 is made of a ceramic sintering pipe, the temperature of the raw coke oven gas is controlled by the temperature control working medium flow feedback regulator, the inlet temperature of the peripheral high-temperature raw coke oven gas channel is 750 ℃, the outlet temperature is controlled at 400 ℃, the inlet temperature of the central high-temperature raw coke oven gas channel is 750 ℃, and the outlet temperature is controlled at 420 ℃.
Example two
A6 m coke oven crude gas waste heat utilization project adopts a multi-stage ascending pipe heat exchanger. The primary heat exchanger 1 and the secondary heat exchanger 2 are used in series, the heat exchange working medium 28 adopts high-temperature heat conduction oil, and the heat conduction oil is used for heating chemical products after being heated. The heat conduction oil enters the primary heat exchanger 1 for heat exchange and then enters the secondary heat exchanger 2 for heat exchange, the first heat exchange coil 22 and the second heat exchange coil 24 are both made of 316 stainless steel pipes, the heat conduction medium 26 is made of metal powder or silicon carbide powder, the protective sleeve 25 is made of a 310S stainless steel pipe, and a ceramic coating is thermally sprayed on the 310S stainless steel pipe. The temperature control working medium flow feedback regulator controls the temperature of the raw coke oven gas, the inlet temperature of the peripheral high-temperature raw coke oven gas channel is 750 ℃, the outlet temperature is controlled at 400 ℃, the inlet temperature of the central high-temperature raw coke oven gas channel is 750 ℃, and the outlet temperature is controlled at 420 ℃.
EXAMPLE III
A7.63-meter extra-large coke oven crude gas waste heat utilization project adopts a multi-stage ascending tube heat exchanger, a primary heat exchanger 1 and a secondary heat exchanger 2 are used in series, and a heat exchange working medium 28 adopts 120 ℃ melting point molten salt. The melting point molten salt with the temperature of 120 ℃ enters the primary heat exchanger 1 for heat exchange and then enters the secondary heat exchanger 2 for heat exchange, 316L stainless steel pipes are adopted as the first heat exchange coil 22 and the second heat exchange coil 24, the heat conducting medium 26 is liquid metal, the protective sleeve 25 is a 310S stainless steel pipe, a ceramic coating is thermally sprayed on the 310S stainless steel pipe, the temperature of the raw coke oven gas is controlled by the temperature control working medium flow feedback regulator, the inlet temperature of the peripheral high-temperature raw coke oven gas channel is 800 ℃, the outlet temperature is controlled at 380 ℃, the inlet temperature of the central high-temperature raw coke oven gas channel is 810 ℃, and the outlet temperature is.
Example four
A7 m large-scale coke oven crude gas waste heat utilization project adopts a multi-stage ascending tube heat exchanger, a primary heat exchanger 1 and a secondary heat exchanger 2 are connected in parallel for use, one part of a heat exchange working medium 28 enters the primary heat exchanger 1 for heat exchange, and the other part enters the secondary heat exchanger 2 for heat exchange to produce saturated steam for use. The first heat exchange coil 22 and the second heat exchange coil 24 are both made of 304 stainless steel tubes, the heat conducting medium 26 is made of graphene, and the protective sleeve 25 is made of a ceramic sintered pipeline. The temperature control working medium flow feedback regulator controls the temperature of the raw coke oven gas, the inlet temperature of the peripheral high-temperature raw coke oven gas channel is 750 ℃, the outlet temperature is controlled at 400 ℃, the inlet temperature of the central high-temperature raw coke oven gas channel is 750 ℃, and the outlet temperature is controlled at 400 ℃.
Example five
A multi-stage ascending tube heat exchanger is adopted in a waste heat utilization project of 6 m coke oven raw gas, a primary heat exchanger 1 and a secondary heat exchanger 2 are connected in parallel for use, a heat exchange working medium 28 adopts high-temperature heat conduction oil, after the heat conduction oil is heated, the heat conduction oil is used for heating chemical products, one part of the heat conduction oil enters the primary heat exchanger 1 for heat exchange, and the other part of the heat conduction oil enters the secondary heat exchanger 2 for heat exchange. The first heat exchange coil 22 and the second heat exchange coil 24 are both made of 316 stainless steel pipes, the heat conducting medium 26 is made of aluminum powder, aluminum nitride and graphene mixed powder, the protective sleeve 25 is made of a 310S stainless steel pipe, and a ceramic coating is thermally sprayed on the 310S stainless steel pipe. The temperature control working medium flow feedback regulator controls the temperature of the raw coke oven gas, the inlet temperature of the peripheral high-temperature raw coke oven gas channel is 750 ℃, and the outlet temperature is controlled at 400 ℃. The inlet temperature of the central high-temperature raw gas channel is 750 ℃, and the outlet temperature is controlled at 420 ℃.
Example six
The waste heat utilization project of the raw gas of the coke oven generates superheated steam, the working medium adopts desalted water, the desalted water enters a primary heat exchanger 1 to exchange heat to generate saturated steam, and the saturated steam then enters a secondary heat exchanger 2 to exchange heat to become superheated steam. The first heat exchange coil 22 and the second heat exchange coil 24 are both made of 316L stainless steel pipes, the heat conducting medium 26 is made of a mixture of liquid metal and aluminum nitride powder, the protective sleeve 25 is made of a 310S stainless steel pipe, and a ceramic coating is thermally sprayed on the 310S stainless steel pipe. The temperature control working medium flow feedback regulator controls the temperature of the raw coke oven gas, the inlet temperature of the peripheral high-temperature raw coke oven gas channel is 800 ℃, and the outlet temperature is controlled at 380 ℃. The inlet temperature of the central high-temperature raw gas channel is 810 ℃, and the outlet temperature is controlled at 450 ℃.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A multi-stage ascending pipe heat exchanger is characterized by comprising a primary heat exchanger, a secondary heat exchanger, a shell and a temperature control working medium flow feedback regulator;
the upper part of the shell is provided with an upper flange, and the lower part of the shell is provided with a lower flange;
the primary heat exchanger and the secondary heat exchanger are both arranged inside the multistage ascending pipe heat exchanger, the primary heat exchanger is close to the shell of the multistage ascending pipe heat exchanger, the secondary heat exchanger is close to the center of the multistage ascending pipe heat exchanger, a first working medium outlet is formed in the upper portion of the primary heat exchanger, a first working medium inlet is formed in the lower portion of the primary heat exchanger, a second working medium outlet is formed in the upper portion of the secondary heat exchanger, and a second working medium inlet is formed in the lower portion of the secondary heat exchanger;
the temperature control working medium flow feedback regulator comprises an upper thermocouple I, a lower thermocouple I, an upper thermocouple II, a lower thermocouple II, a PLC control module, an electric regulating valve I and an electric regulating valve II, the PLC control module comprises a first PLC processor and a second PLC processor, the upper part of the primary heat exchanger is provided with a first upper thermocouple, the lower part of the primary heat exchanger is provided with a first lower thermocouple, the upper part of the secondary heat exchanger is provided with an upper thermocouple II, the lower part of the secondary heat exchanger is provided with a lower thermocouple II, the upper thermocouple I and the lower thermocouple I are both connected with a PLC processor, the upper thermocouple II and the lower thermocouple II are both connected with a PLC processor II, the first working medium inlet is provided with a first electric regulating valve, the second working medium inlet is provided with a second electric regulating valve, the first electric regulating valve is connected with the first PLC processor, and the second electric regulating valve is connected with the second PLC processor.
2. The multi-stage riser pipe heat exchanger as claimed in claim 1, wherein the primary heat exchanger is of a heat exchange coil structure with a protective sleeve or an outer coil structure, when the primary heat exchanger is of a heat exchange coil structure with a protective sleeve, the primary heat exchanger comprises a first heat exchange coil, a heat exchange working medium is arranged in the first heat exchange coil, a protective sleeve is arranged outside the first heat exchange coil, a heat conducting medium is arranged between the first heat exchange coil and the protective sleeve, when the primary heat exchanger is of an outer coil structure, the primary heat exchanger comprises a first outer coil, a first steel cylinder and a second steel cylinder, the first steel cylinder and the second steel cylinder are both of cylindrical structures and are respectively arranged on two sides of the outer coil, a heat exchange working medium is arranged in the outer coil, and a heat conducting medium is arranged outside the outer coil.
3. The multi-stage riser heat exchanger as claimed in claim 1, wherein the secondary heat exchanger is a heat exchange coil structure with a protective sleeve, the secondary heat exchanger comprises a second heat exchange coil, a heat exchange working medium is disposed in the second heat exchange coil, the protective sleeve is disposed outside the second heat exchange coil, and a heat conducting medium is disposed between the second heat exchange coil and the protective sleeve.
4. The multi-stage riser heat exchanger according to claim 1, wherein the shell is made of steel plate, and an expansion joint is provided in the outer middle portion of the shell.
5. The multi-stage riser pipe heat exchanger as claimed in claim 1, wherein the inner wall of the outer shell is provided with a heat insulating layer or a heat insulating layer, the heat insulating layer comprises a heat reflecting glaze layer and a fire resistant layer, the heat reflecting glaze layer is arranged on one side close to the primary heat exchanger, and the heat insulating layer is made of fire resistant fibers.
6. The multi-stage riser heat exchanger as claimed in claim 5, wherein the refractory layer is formed by ring-cutting refractory bricks or pouring refractory material, and the heat-reflecting glaze is sprayed with high-temperature-resistant ceramic.
7. The multi-stage riser heat exchanger according to claim 1, wherein the PLC control module controls the opening degree of the first electric control valve and the second electric control valve according to a set value of a gas temperature in the multi-stage riser heat exchanger, wherein the first PLC processor controls the opening degree of the first electric control valve according to the set value of the gas temperature in the first stage heat exchanger, and the second PLC processor controls the opening degree of the second electric control valve according to the set value of the gas temperature in the second stage heat exchanger.
8. The multi-stage riser heat exchanger according to claim 2, wherein the protective sleeve is made of heat-resistant stainless steel pipe or ceramic sintered pipe.
9. The multi-stage riser heat exchanger according to claim 3, wherein the protective sleeve is made of heat-resistant stainless steel pipe or ceramic sintered pipe.
10. The multi-stage riser heat exchanger of claim 1, wherein the primary heat exchanger is in series or parallel with the secondary heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920139186.7U CN209655881U (en) | 2019-01-28 | 2019-01-28 | A kind of multistage rising heat exchange of heat pipe |
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| CN201920139186.7U CN209655881U (en) | 2019-01-28 | 2019-01-28 | A kind of multistage rising heat exchange of heat pipe |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397404A (en) * | 2020-03-18 | 2020-07-10 | 北京矿冶科技集团有限公司 | Treatment device for high-temperature electric calcining smoke of aluminum electrolysis waste cathode |
| CN112577338A (en) * | 2020-12-30 | 2021-03-30 | 乔治洛德方法研究和开发液化空气有限公司 | High-temperature fluid transportation pipeline internally provided with heat exchange equipment, applicable heat exchange equipment and heat exchange method |
| CN112595146A (en) * | 2020-12-29 | 2021-04-02 | 乔治洛德方法研究和开发液化空气有限公司 | High-temperature fluid transportation pipeline with pipeline shell formed by heat exchange equipment, applicable heat exchange equipment and heat exchange method |
-
2019
- 2019-01-28 CN CN201920139186.7U patent/CN209655881U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111397404A (en) * | 2020-03-18 | 2020-07-10 | 北京矿冶科技集团有限公司 | Treatment device for high-temperature electric calcining smoke of aluminum electrolysis waste cathode |
| CN112595146A (en) * | 2020-12-29 | 2021-04-02 | 乔治洛德方法研究和开发液化空气有限公司 | High-temperature fluid transportation pipeline with pipeline shell formed by heat exchange equipment, applicable heat exchange equipment and heat exchange method |
| CN112595146B (en) * | 2020-12-29 | 2023-09-12 | 乔治洛德方法研究和开发液化空气有限公司 | High-temperature fluid transportation pipeline with pipeline shell composed of heat exchange equipment, applicable heat exchange equipment and heat exchange method |
| CN112577338A (en) * | 2020-12-30 | 2021-03-30 | 乔治洛德方法研究和开发液化空气有限公司 | High-temperature fluid transportation pipeline internally provided with heat exchange equipment, applicable heat exchange equipment and heat exchange method |
| US11940228B2 (en) | 2020-12-30 | 2024-03-26 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | High-temperature fluid transporting pipeline with heat exchange apparatus installed therein, suitable heat exchange apparatus and heat exchange method |
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