CN111457352A - Novel injection type heater of regenerative system of power plant - Google Patents
Novel injection type heater of regenerative system of power plant Download PDFInfo
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- CN111457352A CN111457352A CN202010416307.5A CN202010416307A CN111457352A CN 111457352 A CN111457352 A CN 111457352A CN 202010416307 A CN202010416307 A CN 202010416307A CN 111457352 A CN111457352 A CN 111457352A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a novel injection heater of a regenerative system of a power plant, which comprises a circular shell, a reducing structure, a gradually expanding structure, an outer side spiral baffle plate, an inner side spiral baffle plate and an injection hole. The outer side spiral baffle plate is arranged between the circular shell and the gradually-reducing structure and the gradually-expanding structure, and the inner side spiral baffle plate is arranged in the gradually-expanding structure. The outer spiral baffle plate guides steam and condensed water to carry out dividing wall type heat exchange, the steam after heat exchange is injected into the gradually-expanding structure through the injection hole and mixed in the gradually-expanding structure, and the inner spiral baffle plate arranged in the diffusion structure guides the condensed water and the steam to carry out sufficient mixed heat exchange. The invention utilizes the outer spiral baffle plate to perform wall-dividing type heat exchange between the steam and the condensed water, thereby reducing the irreversible loss of mixed heat exchange; the inner side spiral baffle plate increases the turbulence degree of fluid, prolongs the mixed heat exchange flow of steam and condensed water, strengthens the mixed heat exchange effect, shortens the length of equipment, saves space and reduces equipment consumables.
Description
Technical Field
The invention relates to the field of power plants, in particular to a novel injection heater of a regenerative system of a power plant.
Background
The power industry is the basic industry of national economy in China, and grasps the life line of national economy, wherein thermal power generation accounts for about 70% of the total power generation amount in China, and the important indexes of improving the efficiency of a thermal power generation system and reducing the coal consumption are energy-saving in a thermal power plant. The heat recovery system heats the water supply by extracting steam from the steam turbine, can effectively improve the overall efficiency of the thermal power plant system, and the heat exchange effect of the heat exchanger in the heat recovery system is the key of the performance of the whole heat recovery system, thereby directly influencing the coal consumption of the power plant.
An injection heater is arranged in the regenerative system as a collecting heater as required, and the aim of heating is achieved by boosting the pressure of the feed water, injecting high-temperature steam by using an injector and mixing the high-temperature steam and the feed water in the injector. The injection type heater has the advantages of simple structure, stable operation, low cost and easy maintenance, is equipment for efficiently recycling steam, but the traditional injection type heater has larger volume, larger energy loss caused by the direct mixing of high-pressure high-temperature steam and feed water and poorer thermal performance. Therefore, a novel injection type heater of a regenerative system of a power plant becomes one of urgent needs in the field.
Disclosure of Invention
The invention mainly solves the technical problem of providing a novel injection heater of a regenerative system of a power plant, which can strengthen the heat exchange effect of the traditional injection heater and improve the efficiency of the regenerative system of the power plant.
In order to solve the technical problems, the invention adopts a technical scheme that:
a novel injection heater of a regenerative system of a power plant comprises a circular shell 1, a reducing structure 2, a gradually expanding structure 3, an outer side spiral baffle plate 4, an inner side spiral baffle plate 5 and an injection hole 6; a circular port a11 is arranged on the circular shell 1; the tapered structure 2 is provided with a circular interface b21, a circular boss 22 and a tapered section 23; the divergent structure 3 is provided with a divergent section 31 and a circular interface c 32; the long spiral baffle plate 41, the short spiral baffle plate 42 and the baffle 43 are arranged on the outer spiral baffle plate 4; the injection hole 6 is arranged at the joint of the divergent structure 2 and the divergent structure 3.
The circular shell 1 is a cylindrical hollow shell, the inner diameter of the shell is 400mm, the thickness of the shell is 10mm, and the length of the shell is 2000 mm; the inner diameter of the circular connector a11 on the circular shell 1 is 160mm, the outer diameter is 180mm, the distance between the central axis of the circular connector a11 and the plane of the right end of the circular shell 1 is 150mm, and the distance between the plane of the upper end port of the circular connector a11 and the central axis of the circular shell 1 is 300 mm.
The circular port b21 on the tapered structure 2 is a hollow cylindrical shell, the inner diameter is 240mm, the thickness is 10mm, and the length is 150 mm; the tapered section 23 is a conical shell, the thickness of the shell is 10mm, the inner diameter of the shell is tapered from 240mm to 80mm, and the length of the shell is 980 mm; the circular boss 22 is a hollow cylinder with the outer diameter of 400mm, the inner diameter of 240mm and the length of 20mm, and is arranged between the circular port b21 and the tapered section 23; the axes of the circular interface b21, the circular boss 22 and the tapered section 23 are collinear.
The divergent section 31 on the divergent structure 3 is a conical shell, the thickness is 10mm, the inner diameter is gradually divergent from 80mm to 380mm, and the length is 1000 mm; the circular port c32 on the divergent structure 3 is a cylindrical shell with a thickness of 10mm, an inner diameter of 380mm and a length of 150 mm.
The outer side spiral baffle plate 4 consists of a long spiral baffle plate 41, a short spiral baffle plate 42 and a baffle plate 43; long spiral baffling board 41 is hollow spiral baffling board, and baffling board perpendicular to spiral direction's cross-section is the rectangle, and thickness is 15mm, and pitch is 360mm, and the spiral is clockwise, and long spiral baffling board 41's external diameter is 400mm, and inside is the hollow structure that two cones make up: the length of the long spiral baffle plate 41 is reduced from 234.3mm to 100mm, is 820mm, is increased from 100mm to 400mm, is 1000mm, and is 1820 mm; short spiral baffling board 42 is hollow spiral baffling board, and the cross-section of perpendicular to direction of spiral is the rectangle, and thickness is 15mm, and pitch is 360mm, and the spiral is clockwise, and short spiral baffling board 42's external diameter is 400mm, and inside is the hollow structure that two cones make up: gradually reducing the length of the steel pipe from 260mm to 100mm, wherein the length of the steel pipe is 980mm, gradually expanding the length of the steel pipe from 100mm to 154mm, the length of the steel pipe is 180mm, and the overall length of the steel pipe is 1160 mm; the baffle 43 is a trapezoidal plate, the thickness is 20mm, the height of the trapezoid is 160mm, the length of the upper bottom is 144mm, and the length of the lower bottom is 112 mm; the long spiral baffle plate 41 and the short spiral baffle plate 42 are coaxial, the left end of the short spiral baffle plate 42 is 160mm away from the left end of the long spiral baffle plate 41, and the baffle plate 43 is welded with the long spiral baffle plate 41 and the short spiral baffle plate 42 to fix the relative position between the short spiral baffle plate 42 and the long spiral baffle plate 41.
The inner side spiral baffle plate 5 is of a conical spiral structure, the cross section of the baffle plate perpendicular to the spiral direction is rectangular, the thickness is 15mm, the thread pitch is 280mm, the spiral is in the clockwise direction, the outer diameter of the inner side spiral baffle plate 5 is gradually expanded to 380mm from 134mm, and the length is 820 mm.
The left end of the inner side spiral baffle plate 5 is inserted from the right side of the divergent structure 3 until the outer wall of the inner side spiral baffle plate 5 is attached to the inner wall of the divergent structure 3; the right end of the tapered structure 2 penetrates from the left end of the long spiral baffle plate 41 until the left end of the short spiral baffle plate 42 on the outer side spiral baffle plate 4 is contacted with the circular boss 22 on the tapered structure 2; the left end of a divergent structure 3 with an inner side spiral baffle plate 5 penetrates through the right end of a long spiral baffle plate 41 until the left end of the divergent structure 3 is contacted with the right end of a convergent structure 2, the convergent structure 2 and the divergent structure 3 are coaxial, namely, the hollow structure of the long spiral baffle plate 41 is attached to the outer walls of the convergent structure 2 and the divergent structure 3, and the hollow structure of a short spiral baffle plate 42 is attached to the outer walls of the convergent structure 2 and the divergent structure 3; the injection hole 6 is a circular hole with the diameter of 40mm, and the center of the injection hole 6 is positioned at the joint of the gradually-contracted structure 2 and the gradually-expanded structure 3; the inner wall of the circular shell 1 is attached to the outside of the outer spiral baffle plate 4, and the left end of the circular shell 1 is aligned with the left end of the circular boss 22.
The circular shell 1 is communicated with the external steam side through a circular port a11, so that steam enters a closed space formed between the circular shell 1 and the tapered structure 2 and the tapered structure 3, the steam entering the closed space flows to the left end of the circular shell 1 under the guidance of the external spiral baffle plate 4, when the steam flows to the baffle 43, the flow cross section is reduced due to the blocking of the short spiral baffle plate 42 and the baffle 43, the steam bypasses the baffle 43 and then continues to flow to the left end of the circular shell 1 in a space on one side formed by the long spiral baffle plate 41 and the short spiral baffle plate 42, and the steam reaching the left end of the circular shell 1 flows to the right end of the circular shell 1 in a space on the other side formed by the long spiral baffle plate 41 and the short spiral baffle plate 42 until the steam flows into the injection hole 6; condensed water enters the heater through a circular port b21 on the tapered structure 2, when the condensed water flows through the tapered section 23 of the tapered structure 2, the flow rate of the condensed water is increased and the pressure is reduced due to the reduction of the flow cross section, when the condensed water flows to the injection hole 6, the pressure of the condensed water is reduced to the minimum, at the moment, injection steam enters the heater through the injection hole 6, the steam and the condensed water are mixed in the tapered section 31, the mixed fluid flows spirally under the guidance of an inner side spiral baffle plate 5 arranged in the diffusion section 31, and finally the fluid after mixed heat exchange flows out of the equipment through a circular port c 32; in the whole heat exchange process, the steam and the condensed water are subjected to dividing wall type heat exchange through the shell of the gradually-reducing section 23 and the gradually-expanding section 31, and the steam enters the gradually-expanding section 31 through the injection hole 6 to perform mixed heat exchange with the condensed water.
The invention has the beneficial effects that:
compared with a conventional regenerative system hybrid heater, the novel power plant regenerative system ejector heater has the advantages that the spiral baffle plate is additionally arranged on the outer side of the ejector heater, so that the steam and the condensed water entering the ejector perform wall-dividing type heat exchange, the temperature of the condensed water before the steam and the condensed water are mixed is increased, and the irreversible loss of mixed heat exchange is reduced; simultaneously, through set up the spiral baffling board in adding the injection type heat ware diffuser segment, can effectively prolong the mixed flow of steam and condensate water, promote mixed heat transfer effect, shorten equipment length, practice thrift the space, reduce the equipment consumptive material.
Drawings
FIG. 1 is a three-dimensional external view of an injection heater of a regenerative system of a power plant according to the present invention;
FIG. 2 is a three-dimensional view of a circular housing of an injection heater of a regenerative system of a power plant according to the present invention;
FIG. 3 is a three-dimensional view of a tapered structure of an injection heater of a novel power plant regenerative system according to the present invention;
FIG. 4 is a three-dimensional view of a divergent structure of an injection heater of a novel power plant regenerative system according to the present invention;
FIG. 5 is a three-dimensional view of a tapered structure and a tapered structure of an injection heater of a novel power plant regenerative system according to the present invention;
FIG. 6 is a three-dimensional view of an external spiral baffle plate of an injection heater of a novel power plant regenerative system according to the present invention;
FIG. 7 is a three-dimensional view of an inner spiral baffle plate of an injection heater of a novel power plant regenerative system according to the present invention;
FIG. 8 is a three-dimensional view of the assembly of the diverging structure of the ejector heater of the regenerative system of the power plant and the inner spiral baffle plate according to the present invention;
FIG. 9 is a three-dimensional view of an assembly of a tapered structure and an outer spiral baffle of an injection heater of a novel power plant regenerative system according to the present invention;
FIG. 10 is an assembled three-dimensional view of a reducing structure, a diverging structure and an outer spiral baffle of an injection heater of a novel power plant regenerative system according to the present invention;
FIG. 11 is an assembled top view of a reducing structure, a diverging structure and an outer spiral baffle of the ejector heater of the novel power plant regenerative system according to the present invention;
fig. 12 is a perspective three-dimensional view of an injection heater of a novel power plant regenerative system according to the present invention.
Detailed Description
The invention is further described in detail below with reference to the drawings and the detailed description so that the advantages and features of the invention can be more easily understood by those skilled in the art, and the scope of the invention is more clearly and clearly defined.
A novel injection heater of a regenerative system of a power plant comprises a circular shell 1, a reducing structure 2, a gradually expanding structure 3, an outer side spiral baffle plate 4, an inner side spiral baffle plate 5 and an injection hole 6; a circular port a11 is arranged on the circular shell 1; the tapered structure 2 is provided with a circular interface b21, a circular boss 22 and a tapered section 23; the divergent structure 3 is provided with a divergent section 31 and a circular interface c 32; the long spiral baffle plate 41, the short spiral baffle plate 42 and the baffle 43 are arranged on the outer spiral baffle plate 4; the injection hole 6 is arranged at the joint of the divergent structure 2 and the divergent structure 3; the overall profile structure is shown in fig. 1.
As a preferred embodiment of the present invention, as shown in FIG. 2, the circular housing 1 is a cylindrical hollow housing having an inner diameter of 400mm, a thickness of 10mm and a length of 2000 mm; the inner diameter of the circular connector a11 on the circular shell 1 is 160mm, the outer diameter is 180mm, the distance between the central axis of the circular connector a11 and the plane of the right end of the circular shell 1 is 150mm, and the distance between the plane of the upper end port of the circular connector a11 and the central axis of the circular shell 1 is 300 mm.
As shown in fig. 3, the circular port b21 on the tapered structure 2 is a hollow cylindrical shell with an inner diameter of 240mm, a thickness of 10mm and a length of 150 mm; the tapered section 23 is a conical shell, the thickness of the shell is 10mm, the inner diameter of the shell is tapered from 240mm to 80mm, and the length of the shell is 980 mm; the circular boss 22 is a hollow cylinder with the outer diameter of 400mm, the inner diameter of 240mm and the length of 20mm, and is arranged between the circular port b21 and the tapered section 23; the axes of the circular interface b21, the circular boss 22 and the tapered section 23 are collinear.
As shown in fig. 4, the divergent section 31 of the divergent structure 3 is a conical shell with a thickness of 10mm, an inner diameter of 80mm to 380mm, and a length of 1000 mm; the circular port c32 on the divergent structure 3 is a cylindrical shell, the thickness is 10mm, the inner diameter is 380mm, and the length is 150 mm; the connection form of the tapered structure 2 and the diverging structure 3 is shown in fig. 5.
As shown in fig. 6, the outer spiral baffle 4 is composed of a long spiral baffle 41, a short spiral baffle 42 and a baffle 43; long spiral baffling board 41 is hollow spiral baffling board, and baffling board perpendicular to spiral direction's cross-section is the rectangle, and thickness is 15mm, and pitch is 360mm, and the spiral is clockwise, and long spiral baffling board 41's external diameter is 400mm, and inside is the hollow structure that two cones make up: the length of the long spiral baffle plate 41 is reduced from 234.3mm to 100mm, is 820mm, is increased from 100mm to 400mm, is 1000mm, and is 1820 mm; short spiral baffling board 42 is hollow spiral baffling board, and the cross-section of perpendicular to direction of spiral is the rectangle, and thickness is 15mm, and pitch is 360mm, and the spiral is clockwise, and short spiral baffling board 42's external diameter is 400mm, and inside is the hollow structure that two cones make up: gradually reducing the length of the steel pipe from 260mm to 100mm, wherein the length of the steel pipe is 980mm, gradually expanding the length of the steel pipe from 100mm to 154mm, the length of the steel pipe is 180mm, and the overall length of the steel pipe is 1160 mm; the baffle 43 is a trapezoidal plate, the thickness is 20mm, the height of the trapezoid is 160mm, the length of the upper bottom is 144mm, and the length of the lower bottom is 112 mm; the long spiral baffle plate 41 and the short spiral baffle plate 42 are coaxial, the left end of the short spiral baffle plate 42 is 160mm away from the left end of the long spiral baffle plate 41, and the baffle plate 43 is welded with the long spiral baffle plate 41 and the short spiral baffle plate 42 to fix the relative position between the short spiral baffle plate 42 and the long spiral baffle plate 41.
As shown in FIG. 7, the inner spiral baffle plate 5 is a conical spiral structure, the cross section of the baffle plate perpendicular to the spiral direction is rectangular, the thickness is 15mm, the thread pitch is 280mm, the spiral is clockwise, the outer diameter of the inner spiral baffle plate 5 is gradually expanded from 134mm to 380mm, and the length is 820 mm.
As shown in fig. 8, the left end of the inner helical baffle 5 is inserted from the right side of the divergent structure 3 until the outer wall of the inner helical baffle 5 is attached to the inner wall of the divergent structure 3; as shown in fig. 9, the right end of the tapered structure 2 penetrates from the left end of the long spiral baffle plate 41 until the left end of the short spiral baffle plate 42 on the outer spiral baffle plate 4 contacts the circular boss 22 on the tapered structure 2; as shown in fig. 10, the left end of the divergent structure 3 with the inner side spiral baffle plate 5 penetrates through the right end of the long spiral baffle plate 41 until the left end of the divergent structure 3 contacts with the right end of the convergent structure 2, the convergent structure 2 and the divergent structure 3 are coaxial, that is, the hollow structure of the long spiral baffle plate 41 is attached to the outer walls of the convergent structure 2 and the divergent structure 3, and the hollow structure of the short spiral baffle plate 42 is attached to the outer walls of the convergent structure 2 and the divergent structure 3; as shown in fig. 11, the injection hole 6 is a circular hole with a diameter of 40mm, and the center of the injection hole 6 is located at the connection position of the tapering structure 2 and the diverging structure 3; the inner wall of the circular shell 1 is attached to the outside of the outer spiral baffle plate 4, the left end of the circular shell 1 is aligned with the left end of the circular boss 22, and the heater is shown in fig. 12 after the complete assembly.
The circular shell 1 is communicated with the external steam side through a circular port a11, so that steam enters a closed space formed between the circular shell 1 and the tapered structure 2 and the tapered structure 3, the steam entering the closed space flows to the left end of the circular shell 1 under the guidance of the external spiral baffle plate 4, when the steam flows to the baffle 43, the flow cross section is reduced due to the blocking of the short spiral baffle plate 42 and the baffle 43, the steam bypasses the baffle 43 and then continues to flow to the left end of the circular shell 1 in a space on one side formed by the long spiral baffle plate 41 and the short spiral baffle plate 42, and the steam reaching the left end of the circular shell 1 flows to the circular shell 1 in a space on the other side formed by the long spiral baffle plate 41 and the short spiral baffle plate 42 until the steam flows into the injection hole 6; condensed water enters the heater through a circular port b21 on the tapered structure 2, when the condensed water flows through the tapered section 23 of the tapered structure 2, the flow rate of the condensed water is increased and the pressure is reduced due to the reduction of the flow cross section, when the condensed water flows to the injection hole 6, the pressure of the condensed water is reduced to the minimum, at the moment, injection steam enters the heater through the injection hole 6, the steam and the condensed water are mixed in the tapered section 31, the mixed fluid flows spirally under the guidance of an inner side spiral baffle plate 5 arranged in the diffusion section 31, and finally the fluid after mixed heat exchange flows out of the equipment through a circular port c 32; in the whole heat exchange process, the steam and the condensed water are subjected to dividing wall type heat exchange through the shell of the gradually-reducing section 23 and the gradually-expanding section 31, and the steam enters the gradually-expanding section 31 through the injection hole 6 to perform mixed heat exchange with the condensed water.
In summary, according to the novel injection heater of the regenerative system of the power plant, the spiral baffle plate is additionally arranged on the outer side of the injection heater, so that the steam entering the injector and the condensed water are subjected to wall-dividing type heat exchange, the temperature of the condensed water before the steam and the condensed water are mixed is increased, and the irreversible loss of mixed heat exchange is reduced; simultaneously, through set up the spiral baffling board in adding the injection type heat ware diffuser segment, can effectively prolong the mixed flow of steam and condensate water, promote mixed heat transfer effect, shorten equipment length, practice thrift the space, reduce the equipment consumptive material.
Claims (8)
1. The utility model provides a novel injection heater of regenerative system of power plant which characterized in that: comprises a circular shell (1), a reducing structure (2), a gradually expanding structure (3), an outer side spiral baffle plate (4), an inner side spiral baffle plate (5) and an injection hole (6); a circular interface a (11) is arranged on the circular shell (1); the tapered structure (2) is provided with a circular interface b (21), a circular boss (22) and a tapered section (23); the divergent structure (3) is provided with a divergent section (31) and a circular interface c (32); the outer side spiral baffle plate (4) is provided with a long spiral baffle plate (41), a short spiral baffle plate (42) and a baffle plate (43); the injection hole (6) is arranged at the joint of the divergent structure (2) and the divergent structure (3).
2. The utility model provides a novel injection heater of regenerative system of power plant which characterized in that: the circular shell (1) is a cylindrical hollow shell, the inner diameter of the shell is 400mm, the thickness of the shell is 10mm, and the length of the shell is 2000 mm; the inner diameter of a circular connector a (11) on the circular shell (1) is 160mm, the outer diameter is 180mm, the central axis of the circular connector a (11) is 150mm away from the plane of the right end of the circular shell (1), and the plane of the upper port of the circular connector a (11) is 300mm away from the central axis of the circular shell (1).
3. The utility model provides a novel injection heater of regenerative system of power plant which characterized in that: the circular interface b (21) on the tapered structure (2) is a hollow cylindrical shell, the inner diameter is 240mm, the thickness is 10mm, and the length is 150 mm; the tapered section (23) is a conical shell, the thickness of the shell is 10mm, the inner diameter of the shell is tapered from 240mm to 80mm, and the length of the shell is 980 mm; the circular boss (22) is a hollow cylinder, has the outer diameter of 400mm, the inner diameter of 240mm and the length of 20mm, and is arranged between the circular interface b (21) and the tapered section (23); the axes of the circular interface b (21), the circular boss (22) and the tapered section (23) are the same straight line.
4. The utility model provides a novel injection heater of regenerative system of power plant which characterized in that: the divergent section (31) on the divergent structure (3) is a conical shell, the thickness is 10mm, the inner diameter is gradually divergent from 80mm to 380mm, and the length is 1000 mm; the circular interface c (32) on the divergent structure (3) is a cylindrical shell, the thickness is 10mm, the inner diameter is 380mm, and the length is 150 mm.
5. The utility model provides a novel injection heater of regenerative system of power plant which characterized in that: the outer side spiral baffle plate (4) consists of a long spiral baffle plate (41), a short spiral baffle plate (42) and a baffle plate (43); long spiral baffling board (41) are hollow spiral baffling board, and baffling board perpendicular to spiral direction's cross-section is the rectangle, and thickness is 15mm, and pitch is 360mm, and the spiral is clockwise, and the external diameter of long spiral baffling board (41) is 400mm, and inside is the hollow structure that two cones make up: the length of the long spiral baffle plate (41) is gradually reduced from 234.3mm to 100mm, is 820mm, then gradually increased from 100mm to 400mm, is 1000mm, and the whole length of the long spiral baffle plate (41) is 1820 mm; short spiral baffling board (42) are hollow spiral baffling board, and the cross-section of perpendicular to helical direction is the rectangle, and thickness is 15mm, and pitch is 360mm, and the spiral is clockwise, and the external diameter of short spiral baffling board (42) is 400mm, and inside is the hollow structure that two cones make up: gradually reducing the length of the steel pipe from 260mm to 100mm, wherein the length of the steel pipe is 980mm, gradually expanding the length of the steel pipe from 100mm to 154mm, the length of the steel pipe is 180mm, and the overall length of the steel pipe is 1160 mm; the baffle (43) is a trapezoidal plate, the thickness of the baffle is 20mm, the height of the trapezoid is 160mm, the length of the upper bottom is 144mm, and the length of the lower bottom is 112 mm; the long spiral baffle plate (41) and the short spiral baffle plate (42) are coaxial, the left end of the short spiral baffle plate (42) is 160mm away from the left end of the long spiral baffle plate (41), and the baffle plate (43) is welded with the long spiral baffle plate (41) and the short spiral baffle plate (42) to fix the relative position between the short spiral baffle plate (42) and the long spiral baffle plate (41).
6. The utility model provides a novel injection heater of regenerative system of power plant which characterized in that: the inner side spiral baffle plate (5) is of a conical spiral structure, the cross section of the baffle plate perpendicular to the spiral direction is rectangular, the thickness is 15mm, the thread pitch is 280mm, the spiral is in the clockwise direction, the outer diameter of the inner side spiral baffle plate (5) is gradually expanded to 380mm from 134mm, and the length is 820 mm.
7. The utility model provides a novel injection heater of regenerative system of power plant which characterized in that: the reducing structure (2) and the diverging structure (3) are coaxial, and the right end of the reducing structure (2) is matched with the left end of the diverging structure (3); the injection hole (6) is a circular hole with the diameter of 40mm, and the center of the injection hole (6) is positioned at the connection part of the gradually-contracted structure (2) and the gradually-expanded structure (3); the left end of a short spiral baffle plate (42) on the outer side spiral baffle plate (4) is contacted with a circular boss (22) on the gradually-reduced structure (2), namely, the hollow structure of the long spiral baffle plate (41) is attached to the outer walls of the gradually-reduced structure (2) and the gradually-enlarged structure (3), and the hollow structure of the short spiral baffle plate (42) is attached to the outer walls of the gradually-reduced structure (2) and the gradually-enlarged structure (3); the inner wall of the circular shell (1) is attached to the outer parts of the inner side spiral baffle plate (5) and the outer side spiral baffle plate (4), and the left end of the circular shell (1) is aligned to the left end of the circular boss (22); the inner side spiral baffle plate (5) is arranged inside the divergent structure (3), and the outer wall of the inner side spiral baffle plate (5) is attached to the inner wall of the divergent structure (3).
8. The utility model provides a novel injection heater of regenerative system of power plant which characterized in that: the circular shell (1) is communicated with the external steam side through a circular interface a (11), so that steam enters a closed space formed between the circular shell (1) and the tapered structure (2) and the gradually-expanded structure (3), flows to the end of the tapered structure (2) from the end of the gradually-expanded structure (3) under the guidance of the external spiral baffle plate (4), and flows to the injection hole (6) from the end of the tapered structure (2); condensed water enters the heater through a circular interface b (21) on the reducing structure (2), flows through a reducing section (23) of the reducing structure (2), and then is guided into the inner side of the heater by utilizing an injection hole (6), and the steam and the condensed water flow out after being mixed in a reducing section (31); the steam and the condensed water are subjected to dividing wall type heat exchange through the shell of the reducing section (23) and the gradually expanding section (31), and the steam enters the gradually expanding section (31) through the injection hole (6) to perform mixed heat exchange with the condensed water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010416307.5A CN111457352A (en) | 2020-05-17 | 2020-05-17 | Novel injection type heater of regenerative system of power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010416307.5A CN111457352A (en) | 2020-05-17 | 2020-05-17 | Novel injection type heater of regenerative system of power plant |
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| CN111457352A true CN111457352A (en) | 2020-07-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251827A (en) * | 2021-04-09 | 2021-08-13 | 浙江态能动力技术有限公司 | Built-in supercritical carbon dioxide large-temperature-difference mixed heat exchanger and control and regulation method |
| CN113280649A (en) * | 2021-04-09 | 2021-08-20 | 浙江态能动力技术有限公司 | External supercritical carbon dioxide large-temperature-difference mixed heat exchanger and control and regulation method |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113251827A (en) * | 2021-04-09 | 2021-08-13 | 浙江态能动力技术有限公司 | Built-in supercritical carbon dioxide large-temperature-difference mixed heat exchanger and control and regulation method |
| CN113280649A (en) * | 2021-04-09 | 2021-08-20 | 浙江态能动力技术有限公司 | External supercritical carbon dioxide large-temperature-difference mixed heat exchanger and control and regulation method |
| CN113280649B (en) * | 2021-04-09 | 2022-04-12 | 浙江态能动力技术有限公司 | External supercritical carbon dioxide large-temperature-difference mixer and control and regulation method |
| CN113251827B (en) * | 2021-04-09 | 2022-04-12 | 浙江态能动力技术有限公司 | Built-in supercritical carbon dioxide large-temperature-difference mixer and control and regulation method |
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