CN211178066U - High-temperature sleeve combined plate heat exchanger capable of accurately controlling temperature - Google Patents
High-temperature sleeve combined plate heat exchanger capable of accurately controlling temperature Download PDFInfo
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- CN211178066U CN211178066U CN201921724788.5U CN201921724788U CN211178066U CN 211178066 U CN211178066 U CN 211178066U CN 201921724788 U CN201921724788 U CN 201921724788U CN 211178066 U CN211178066 U CN 211178066U
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Abstract
The utility model discloses a high temperature sleeve combined plate heat exchanger capable of accurately controlling temperature, which comprises a frame, a heat exchange component high temperature sleeve, a heat exchange component plate, an electric air valve, an electric louver valve, a thermocouple and a non-heat exchange built-in flue; the heat exchange assembly high-temperature sleeve and the heat exchange assembly plate are connected through welding to form a hot side channel and a cold side channel. The thermoelectric couple of the heat exchanger is arranged on a heat exchange medium outlet pipeline, is connected with a control cabinet through a cable to control the closing angle of the electric air valve or the electric louver valve, and the other end of the thermoelectric couple is connected with the electric air valve or the electric louver valve through a signal wire to transmit a control signal; the hot side channel passes through the flue gas, and the cold side channel passes through cold wind, and this kind of structure of heat exchange assembly can be able to bear higher temperature moreover. Through the utility model discloses a method increase the availability factor of equipment, also increased the life of equipment.
Description
Technical Field
The utility model belongs to gaseous heat exchange and control technology thereof, concretely relates to high temperature sleeve combination plate heat exchanger of accurate accuse temperature.
Background
In the industrial production, a large amount of waste gas is often generated, particularly in production lines of chemical industry, steel industry and the like, the waste gas has high concentration and does not contain oxygen due to different products and different working conditions, the danger coefficient is high when the waste gas with high concentration and without oxygen is treated without a flame-retardant burner, particularly, the tempering phenomenon occurs, and further, the immeasurable loss is caused. Especially, the combustion treatment is carried out in a positive pressure furnace, the risk of tempering is increased, and the concentration of the discharged tail gas cannot meet the requirement of environmental protection treatment.
Different structure settings are provided in the prior heat exchangers and equipment thereof according to different applicable environments, but the technical problems that the heat exchange process of the heat exchanger is difficult to control and the heat exchange effect cannot be mastered generally exist, and the problems of complex structure or short service life exist.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to improve the heat exchange efficiency and prolong the service life of the gas heat exchanger, the utility model aims at providing a high temperature sleeve combined plate heat exchanger capable of accurately controlling the temperature.
The technical scheme is as follows: a high-temperature sleeve combined plate heat exchanger capable of accurately controlling temperature comprises a frame, a heat exchange assembly high-temperature sleeve, a heat exchange assembly plate, an electric air valve, a first thermocouple, a second thermocouple, a non-heat exchange built-in flue and an electric louver valve; the frame is used for fixedly mounting a heat exchange assembly of the heat exchanger, heat exchange units are formed by heat exchange assembly high-temperature sleeves and heat exchange assembly plates, a hot side channel and a cold side channel are formed between every two adjacent heat exchange units, a non-heat exchange built-in flue is arranged, the electric air valve is arranged on the non-heat exchange built-in flue, the electric louver valve is arranged behind the heat side channel heat exchange assembly plates, the first thermocouple and the second thermocouple are arranged on a heat exchange medium outlet pipeline and are connected with a control cabinet of the heat exchanger through cables, and the other end of the electric air valve and the electric louver valve are connected and transmitted through signal lines.
Furthermore, the heat exchange unit is formed by heat exchange assembly high temperature sleeve and heat exchange assembly plate reducing welding, heat exchange assembly high temperature sleeve includes 2 inside and outside sleeves, and inner skleeve and outer sleeve are concentric ring and are set up.
Furthermore, the distance between adjacent heat exchange units forms a non-heat exchange built-in flue with a hollow structure, an electric air valve is arranged at the front end or the hot side smoke inlet end of the non-heat exchange built-in flue, and the electric air valve controls the ratio of gas inlet and outlet.
The electric louver valves comprise a first electric louver valve and a second electric louver valve or more than two groups of electric louver valves, the two sides of each electric louver valve are respectively connected with the outlets of the hot side channel and the hot side channel, the electric louver valves are proportional adjusting switches, and the interlocking action is controlled through thermocouples which are correspondingly distributed.
The thermocouple is a K-type thermocouple at 0-1300 ℃, one end of the thermocouple is connected with a signal of the control cabinet, and the other end of the thermocouple transmits a signal to an actuating mechanism of the electric air valve and the electric louver valve to realize the on-off control of the valve.
Furthermore, the frame of the heat exchanger comprises a steel frame, a heat preservation plate and an outer protection plate, wherein the steel frame is made of galvanized square tubes, the heat preservation material is aluminum silicate fibers, the heat preservation thickness is larger than or equal to 150mm, the temperature of the outer protection plate is not larger than 60 ℃, the outer protection plate is made of S30408 stainless steel, and the thickness is larger than or equal to 1.5 mm.
The control method for implementing the high-temperature sleeve combined plate heat exchanger of the heat exchanger comprises the following steps of:
the heat exchange medium outlet temperature is set on the control cabinet, and then the heat exchange medium outlet temperature of the heat exchanger is controlled through the electric air valve and the electric shutter valve, and the heat exchange medium outlet temperature control method comprises a first-stage temperature control and a second-stage temperature control, and specifically comprises the following steps:
first-stage temperature control: if the temperature of the heat exchange medium outlet is higher than the set temperature, a signal is sent to the electric louver valve to reduce the opening, and the quantity of gas of the flue gas passing through the heat exchange channel is reduced to realize cooling;
and (3) second-stage temperature control: if the temperature of the heat exchange medium outlet is still over-temperature, opening the electric air valve according to the signal to directly discharge part or all of the smoke on the hot side through the non-heat exchange built-in flue, and slowly adjusting the opening of the electric air valve according to the signal while keeping the opening of the electric shutter valve unchanged until the temperature is reduced and kept stable; on the contrary, if the temperature of the heat exchange medium outlet is lower than the set temperature, the signal is transmitted to the electric air valve to enable the electric air valve to be closed slowly until the temperature of the heat exchange medium outlet is raised to the set temperature; if the set temperature is not reached, the signal is transmitted to the electric louver valve to enable the electric louver valve to be opened slowly until the temperature of the heat exchange medium outlet rises to the set temperature, and finally the opening degree of the electric louver valve is kept according to the signal.
Furthermore, the cross section area and the length between the inner sleeve and the outer sleeve of the heat exchange unit in the heat exchanger are determined according to the flow and the temperature of a heat exchange medium, namely the flow velocity of the heat exchange medium is controlled to be 20-25 m/s. The distance between the plate plates of the heat exchange assembly is determined according to the flow and the temperature of a heat exchange medium, the range is 8-20 mm, and the flow velocity of the heat exchange medium is controlled to be maintained at 10-15 m/s.
The electric actuating mechanisms of the electric air valve and the electric louver valve are controlled to rotate in proportion according to the signal analog quantity, so that the opening and closing angles of the valve are adjusted, and the initial state of the heat exchanger control is set to be fully opened or fully closed.
Has the advantages that: compared with the prior art, the utility model, its effect that is showing is as follows:
(1) the heat exchanger of the utility model controls the electric air valve through the temperature control of the electric control cabinet to realize the regulation and control of the temperature of the heat exchange gas, realizes the intervention control of the heat exchange process, and improves the heat exchange effect of the heat exchanger and the applicability to different occasions and environments;
(2) the utility model provides a heat exchanger adopts high temperature resistant metal to strengthen, has improved more than 10% than current plate heat exchanger is high temperature resistant, and the medium heat transfer passageway that newly sets up simultaneously can promote the heat transfer effect control of different stages, and structural easy to maintain and change have not only increased the availability factor of equipment, have also increased the life of equipment, have all improved more than 10% than the work efficiency and the life of the waste gas incinerator system of current joining in marriage plate heat exchanger.
(3) The utility model provides a heat exchanger and control method compare current device safety more through the optimization and the control of structure, and its security performance experiment detects and improves more than 20%.
Drawings
Fig. 1 is a schematic structural diagram of the heat exchanger of the present invention.
Fig. 2 is the internal structure schematic diagram of the heat exchanger of the present invention.
Detailed Description
To explain the technical solutions disclosed in the present invention in detail, the following description will be made with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, a high-temperature sleeve combined plate heat exchanger capable of accurately controlling temperature comprises a frame 1, a heat exchange assembly high-temperature sleeve 2, a heat exchange assembly plate 3, an electric air valve 4, a first thermocouple 5, a second thermocouple 6, a non-heat exchange built-in flue 7 and an electric louver valve; the electric louver valves in this embodiment include two sets, namely an electric louver valve 801 and an electric louver valve 802.
The heat exchange assembly high-temperature sleeve 2 and the heat exchange assembly plate 3 are connected through reducing welding to form a heat exchange unit which is fixed on the frame 1, a non-heat exchange built-in flue 7 is arranged at the interval between the 2 heat exchange units, and the electric air valve 4 is arranged at the front end of the non-heat exchange flue 7, namely, the hot side flue gas inlet end. And an air fan or an air inlet pipeline is connected to the cold side air inlet, one end of the cold side air channel is welded with the heat exchange assembly high-temperature sleeve 2, and the other end of the cold side air channel is welded with the heat exchange assembly plate 3. 2 air ducts at the cold side outlet are combined into a duct outlet, 2 thermocouples are arranged at the cold side air outlet duct and are a first thermocouple 5 and a second thermocouple 6, one end of each thermocouple is connected with the electric control cabinet through a cable, and the other end of each thermocouple is connected with the electric air valve 4 and electric actuating mechanisms of the corresponding first electric louver valve 801 and the corresponding second electric louver valve 802 through signal lines. One end of each electric louver valve 2 is welded with the heat exchange component plate 3, and the other end of each electric louver valve is welded with the hot-side smoke outlet end and fixed on the frame 1. The frame 1 is externally packaged by heat insulation cotton and an external sealing plate, and an interface flange is reserved.
The basic components of the heat exchanger and their arrangement requirements, which are well known to the person skilled in the art, are not described in detail here. The utility model discloses specific theory, first thermocouple 5 and second thermocouple 6 are setting up on heat transfer medium outlet pipe to be connected with the switch board through the cable, the other end passing signal line is connected with electronic blast gate 4 and first electronic louver valve 801 and the electronic louver valve 802 of second, realizes the transmission of signal. The heat exchange assembly high-temperature sleeve 2 and the heat exchange assembly plate 3 are connected through welding to form a hot side channel and a cold side channel, the hot side channel passes through flue gas, the cold side channel passes through cold air, and the structure of the heat exchange assembly can resist higher temperature; the electric air valve 4 is arranged on the non-heat exchange built-in flue 7, and the first electric louver valve 801 and the second electric louver valve 802 are respectively arranged behind the heat side channel heat exchange assembly plate 3; the frame 1 is a structure which is made of galvanized square tubes and used for fixing the heat exchange assemblies, the structure comprises a steel frame and a heat preservation and outer guard plate, the steel frame is made of the galvanized square tubes, the heat preservation material is aluminum silicate fibers, the heat preservation thickness is larger than or equal to 150mm, the temperature of the outer guard plate is guaranteed to be smaller than or equal to 60 ℃, the outer guard plate is made of S30408 stainless steel, and the thickness of the outer guard plate is 1.5 mm.
More specifically, the heat exchange unit consists of 2 parts, namely a heat exchange assembly high-temperature sleeve 2 and a heat exchange assembly plate 3; the high-temperature sleeve 2 of the thermal assembly consists of an inner sleeve and an outer sleeve, the cross section area and the length between the inner sleeve and the outer sleeve can be determined and adjusted according to the flow and the temperature of a heat exchange medium, the flow velocity of the heat exchange medium is ensured to be 20-25 m/s, and thus the heat exchange efficiency through heat transfer is highest; meanwhile, the high-temperature sleeve 2 is made of S31008 stainless steel material, the thickness is about 3mm, and the high-temperature sleeve can resist higher high temperature which can reach more than 1000 ℃ compared with a method of directly using a plate. The plate spacing of the heat exchange component plates 3 can be adjusted between 10 mm and 20mm according to the flow and temperature of a heat exchange medium, and the flow velocity of the heat exchange medium is guaranteed to be maintained at 10-15 m/s. And according to the temperature of the plate wall, stainless steel of different materials is selected, S31008 stainless steel is selected when the temperature of the plate wall is more than or equal to 600 ℃, S31603 stainless steel is selected when the temperature of the plate wall is more than or equal to 500 ℃, and S30408 stainless steel is selected when the temperature of the plate wall is less than 500 ℃. Therefore, the consumption of expensive materials can be reduced by 'high temperature and high use and low temperature', and the cost is saved.
The non-heat exchange built-in flue 7 is determined by the space between 2 heat exchange units to form a hollow structure, S31008 stainless steel is adopted, the thickness is about 3mm, the diameter of the flue pipe is adjustable, and the adjusting range is DN50-500 mm. And an electric air valve 4 is provided at the inlet. The electric air valve 4 is a high-temperature-resistant valve, has good air tightness and low failure rate, and adjusts the switching value according to the proportion. The specification of the electric air valve 4 can be adjusted along with the pipe diameter of the built-in flue 7. The valve specification is usually DN50-500 mm. The opening degree is 5 percent, namely one gear until the switch is fully opened or fully closed.
One side of the electric shutter valve is connected with the hot side channel, and the other side of the electric shutter valve is connected with the outlet of the hot side channel; the thermocouple and the electric louver valve are correspondingly arranged to realize the interlocking control of the valve. The opening of the electric shutter valve is adjusted in proportion, and the opening is 5 percent and first gear until the shutter valve is fully opened or fully closed.
The thermocouples are all K-type thermocouples with the temperature of 0-1300 ℃, so that the measurement accuracy is ensured, and the measurement error is reduced. One end of the valve is connected with a signal of the control cabinet, and the other end of the valve transmits a signal to an actuating mechanism of the electric air valve and the electric louver valve to realize the opening and closing of the valve.
By default, the first and second electrically operated louver valves 801 and 802 are held fully open. The outlet temperature of the heat exchange medium is set on the control cabinet,
first-stage temperature control: if the outlet temperature of the heat exchange medium is greater than the set temperature, a signal is sent to the electric louver valve to reduce the opening degree, and less flue gas is cooled through the heat exchange channel. And (3) second-stage temperature control: if the temperature of the heat exchange medium outlet is still over-temperature, the electric air valve 4 is opened according to the signal to enable more flue gas on the hot side to be directly discharged through the non-heat exchange built-in flue 7, the opening degree of the valve is slowly adjusted according to the signal, and meanwhile, the opening degree of the electric shutter valve is kept unchanged until the temperature is reduced and kept stable. On the contrary, if the outlet temperature of the heat exchange medium is lower than the set temperature, the signal is transmitted to the electric air valve 4 to slowly close the electric air valve until the outlet temperature of the heat exchange medium is raised to the set temperature; if the temperature of the heat exchange medium is not reached, the signal is transmitted to the electric louver valve to enable the electric louver valve to be opened slowly until the temperature of the heat exchange medium outlet rises to the set temperature, and finally the valve opening degree is kept according to the signal.
The electric air valve 4 and the electric actuating mechanisms of the electric louver valves are convenient to maintain and replace, and rotate proportionally according to the signal analog quantity, so that the opening and closing angles of the valves are adjusted.
The utility model provides a but high temperature resistant stainless steel is preferred to the used material of high temperature sleeve combination plate heat exchanger of accurate temperature control. Experiments and practical use show that the high temperature resistance of the waste gas incinerator system is improved by 10% compared with the existing plate heat exchanger, and the working efficiency and the service life of the waste gas incinerator system are both improved by 10% compared with the existing waste gas incinerator system with the plate heat exchanger. Compared with the heat exchange temperature accuracy of the existing plate heat exchanger, the temperature regulation and control accuracy is improved by 10%, and the safety of the equipment is improved by 20%.
Claims (8)
1. The utility model provides a but high temperature sleeve combination plate heat exchanger of accurate temperature control which characterized in that: the device comprises a frame (1), a heat exchange assembly high-temperature sleeve (2), a heat exchange assembly plate (3), an electric air valve (4), a first thermocouple (5), a second thermocouple (6), a non-heat exchange built-in flue (7) and an electric louver valve (8); the heat exchange assembly of the heat exchanger is fixedly installed on the frame (1), heat exchange units are formed by a heat exchange assembly high-temperature sleeve (2) and heat exchange assembly plates (3), a hot side channel and a cold side channel are formed between every two adjacent heat exchange units, a non-heat exchange built-in flue (7) is arranged, the electric air valve (4) is arranged on the non-heat exchange built-in flue (7), the electric louver valve (8) is arranged behind the hot side channel heat exchange assembly plates (3), the first thermocouple (5) and the second thermocouple (6) are arranged on a heat exchange medium outlet pipeline and are connected with a control cabinet of the heat exchanger through cables, and the other end of the electric air valve (4) and the electric louver valve (8) are connected and transmitted through signal lines.
2. The high temperature sleeve combined plate heat exchanger capable of accurately controlling the temperature according to claim 1, wherein: the heat exchange unit is formed by welding the heat exchange assembly high-temperature sleeve (2) and the heat exchange assembly plate (3) in a variable diameter mode.
3. The high temperature sleeve combined plate heat exchanger capable of accurately controlling the temperature according to claim 2, wherein: the interval between two heat exchange units forms a non-heat exchange built-in flue (7) with a hollow structure, an electric air valve (4) is arranged at the front end or the hot side smoke inlet end of the non-heat exchange built-in flue (7), and the electric air valve (4) controls the gas inlet and outlet proportion.
4. The high temperature sleeve combined plate heat exchanger capable of accurately controlling the temperature according to claim 1, wherein: the electric louver valve (8) comprises a first electric louver valve (801) and a second electric louver valve (802) or more than two groups of electric louver valves, two sides of the electric louver valve (8) are respectively connected with outlets of a hot side channel and a hot side channel, the electric louver valve (8) is a proportional adjusting switch, and the interlocking action is controlled through thermocouples correspondingly distributed.
5. The high temperature sleeve combined plate heat exchanger capable of accurately controlling the temperature according to claim 1, wherein: the thermocouple is a K-type thermocouple at 0-1300 ℃, one end of the thermocouple is connected with a signal of the control cabinet, and the other end of the thermocouple transmits a signal to an actuating mechanism of the electric air valve (4) and the electric louver valve (8) to realize the on-off control of the valve.
6. The high-temperature sleeve combined plate heat exchanger capable of accurately controlling the temperature according to claim 1, wherein the frame (1) of the heat exchanger comprises a steel frame and a heat preservation and outer protection plate, the steel frame is a galvanized square tube, the heat preservation thickness is more than or equal to 150mm, the temperature of the outer protection plate is ensured to be less than or equal to 60 ℃, and the outer protection plate is a stainless steel wire drawing panel, and the thickness is more than or equal to 1.5 mm.
7. The high temperature sleeve combined plate heat exchanger capable of accurately controlling the temperature according to claim 1, wherein: the heat exchange assembly high-temperature sleeve (2) consists of an inner sleeve and an outer sleeve which are concentrically and circularly arranged; the cross section area and the length between the inner sleeve and the outer sleeve of the heat exchange unit in the heat exchanger are determined according to the flow and the temperature of a heat exchange medium, and the flow velocity of the heat exchange medium is controlled to be 20-25 m/s; the plate spacing of the heat exchange component plates (3) is determined according to the flow and the temperature of a heat exchange medium, the spacing range is 8-20 mm, and the flow velocity of the heat exchange medium is controlled to be maintained at 10-15 m/s.
8. The high temperature sleeve combined plate heat exchanger capable of accurately controlling the temperature according to claim 1, wherein: and electric actuating mechanisms of the electric air valve (4) and the electric louver valve (8) are controlled to rotate in proportion according to the signal analog quantity, so that the opening and closing angles of the valves are adjusted.
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| CN201921724788.5U CN211178066U (en) | 2019-10-15 | 2019-10-15 | High-temperature sleeve combined plate heat exchanger capable of accurately controlling temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595236A (en) * | 2019-10-15 | 2019-12-20 | 南京宜热纵联节能科技有限公司 | High-temperature sleeve combined plate heat exchanger capable of accurately controlling temperature and control method thereof |
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2019
- 2019-10-15 CN CN201921724788.5U patent/CN211178066U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595236A (en) * | 2019-10-15 | 2019-12-20 | 南京宜热纵联节能科技有限公司 | High-temperature sleeve combined plate heat exchanger capable of accurately controlling temperature and control method thereof |
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