CN216897260U - Heat pipe low-temperature economizer with adjustable heat exchange area - Google Patents
Heat pipe low-temperature economizer with adjustable heat exchange area Download PDFInfo
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- CN216897260U CN216897260U CN202220421049.4U CN202220421049U CN216897260U CN 216897260 U CN216897260 U CN 216897260U CN 202220421049 U CN202220421049 U CN 202220421049U CN 216897260 U CN216897260 U CN 216897260U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a heat pipe low-temperature economizer with an adjustable heat exchange area, which comprises a heat exchange module, an inlet straight section flue, an inlet flue reducer, an outlet straight section flue, an inlet left baffle door, an inlet right baffle door, an outlet left baffle door, an outlet right baffle door, an inlet left guide plate, an inlet right guide plate, an outlet left guide plate, an outlet right guide plate, an ash hopper and a pipe plate, wherein the inlet straight section flue is provided with an inlet large end and an outlet small end; the upper end of the ash bucket is communicated with the bottom of the big end and the small end of the inlet flue, the lower part of the ash bucket is communicated with the bin pump, and the bottom of the bin pump is communicated with the ash conveying pipeline. The tube plate is vertically arranged along the flowing direction of the flue gas and is parallel to the heat exchange tubes of the heat exchange module, and the flue gas side of the heat exchange module is equally divided into 4 channels which are not communicated with each other. The guide plate is an electric control swing arc shutter type guide plate. The utility model can adjust the heat exchange area of the heat pipe low-temperature economizer along with the load change of the group, and avoids the problem of dust accumulation of the heat pipe low-temperature economizer under the low-load working condition.
Description
Technical Field
The utility model belongs to the technical field of flue gas waste heat recovery, and particularly relates to a heat pipe low-temperature economizer with an adjustable heat exchange area.
Background
With the continuous promotion of the low-carbon and environment-friendly policy in China, the low-temperature and low-temperature electric dust removal technology is widely applied to a thermal power plant, and the low-temperature coal economizer is arranged in front of the electric dust remover, so that the heat of flue gas is recovered, the coal consumption of a unit is reduced, meanwhile, the efficiency of the electric dust remover is improved, the water consumption of a desulfurizing tower is reduced, and the energy-saving and environment-friendly benefits are remarkable. In recent years, with the increase of the installed capacity of new energy, the load rate of a thermal power generating unit is reduced year by year, and the thermal power generating unit operates at low load for a long time. When the original low-temperature economizer is in low load, the flow velocity of flue gas is too low, serious dust deposition is formed, resistance is increased due to the dust deposition, a flow field is uneven, abrasion of the heat exchanger is aggravated, and finally leakage of the heat exchanger is caused. According to incomplete statistics, more than 80% of low-temperature economizers generate leakage, and a part of low-temperature economizers with serious leakage even quit the operation completely, so that the reliability of the low-temperature economizers is lower, and the safe operation of a unit is influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the background art, the utility model provides the heat pipe low-temperature economizer with the adjustable heat exchange area.
In order to achieve the purpose, the utility model provides the following technical scheme:
a heat pipe low-temperature economizer with an adjustable heat exchange area comprises a heat exchange module, an inlet straight-section flue, an inlet flue reducer, an outlet flue reducer and an outlet straight-section flue, wherein a pipe plate assembly is arranged on the flue gas side of the heat exchange module, and divides the flue gas side of the heat exchange module into a plurality of flue gas channels which are not communicated with each other; the tube plate assembly comprises a first tube plate, … … and an Nth tube plate, wherein N is more than or equal to 1 and is an integer;
the smoke side of the heat exchange module is provided with N tube plates along the direction parallel to the smoke flowing direction, the smoke side of the heat exchange module is uniformly divided into N +1 smoke channels which are not communicated with each other by the tube plates, N is more than or equal to 1, and two ends of each smoke channel are provided with baffle doors capable of blocking the two ends of the smoke channel;
the inlet straight section flue is arranged at the inlet of the inlet flue reducer, the outlet of the inlet flue reducer is connected with one end of the flue gas side of the heat exchange module, the inlet of the outlet flue reducer is connected with the other end of the flue gas side of the heat exchange module, and the outlet of the outlet flue reducer is connected with the outlet straight section flue;
a first guide plate and a second guide plate are symmetrically arranged on two sides of an inner cavity of the inlet flue reducer, one end of the first guide plate is connected with the inlet of the inlet flue reducer, the other end of the first guide plate extends to the end part of one end of a first tube plate, one end of the second guide plate is connected with the inlet of the inlet flue reducer, and the other end of the second guide plate extends to the end part of one end of a second tube plate;
a third guide plate and a fourth guide plate are symmetrically arranged on two sides of an inner cavity of the large and small end of the outlet flue, one end of the third guide plate is connected with the large and small end inlet of the outlet flue, the other end of the third guide plate extends to the end part of the other end of the first tube plate, one end of the fourth guide plate is connected with the large and small end inlet of the outlet flue, and the other end of the fourth guide plate extends to the end part of the other end of the second tube plate;
the first tube plate and the second tube plate are the same tube plate or different tube plates which are in symmetrical positions;
the first guide plate, the second guide plate, the third guide plate and the fourth guide plate are all louver type guide plates.
Preferably, the first guide plate, the second guide plate, the third guide plate and the fourth guide plate are electrically controlled arc-shaped shutter type guide plates capable of swinging, electric actuating mechanisms of the first guide plate and the second guide plate are installed at the inlet part of the large end and the small end of the inlet flue, and electric actuating mechanisms of the third guide plate and the fourth guide plate are installed at the outlet part of the large end and the small end of the outlet flue.
Preferably, the tube plate is provided with a groove for inserting the baffle door, and the baffle door can be vertically inserted into the tube plate from two sides perpendicular to the flow direction of the flue gas in the heat exchange module to block two ends of the flue gas channel or remove the blocking of two ends of the flue gas channel.
Preferably, the drive system for the flapper door is electrically driven, sealing between the flapper door and the tube sheet.
Preferably, an ash bucket is arranged at the bottom of the reducer of the inlet flue, a bin pump is arranged at the bottom of the ash bucket, and an outlet of the bin pump is connected with an ash conveying pipeline.
Preferably, the heat exchange modules are vertically arranged, the heat exchangers of the heat exchange modules are gravity heat pipes, and the tubes of the gravity heat pipes are light tubes, finned tubes or three-dimensional finned tubes.
Preferably, the heat exchange module is vertically arranged in the horizontal flue at the inlet of the dust remover.
Preferably, 1-3 tube plates are arranged on the flue gas side of the heat exchange module along the direction parallel to the flow direction of the flue gas;
when three tube plates are arranged, the three tube plates are respectively marked as a first tube plate, a second tube plate and a third tube plate in sequence, the second tube plate is displaced between the first tube plate and the third tube plate, the end part of the first guide plate extends to the end part of one end of the first tube plate, and the end part of the second guide plate extends to the end part of one end of the third tube plate; the tip of third guide plate extends to the tip of the first tube sheet other end, and the tip of fourth guide plate extends to the tip of the third tube sheet other end.
The utility model has the following beneficial effects:
the heat pipe low-temperature economizer with the adjustable heat exchange area can realize the adjustment of the four states by arranging the tube plate assembly, the baffle door and the shutter type guide plate, so that the heat exchange area of the heat pipe low-temperature economizer can be adjusted. The utility model solves the problem of dust accumulation of the original low-temperature economizer structure during long-time low-load operation of a thermal power generating unit, thereby avoiding the problems of resistance rise, heat exchanger abrasion, leakage and the like caused by dust accumulation, prolonging the service life of the low-temperature economizer, improving the operation reliability and economy of the heat pipe low-temperature economizer and improving the safety of the unit.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a top view of a heat pipe low-temperature economizer with an adjustable heat exchange area according to an embodiment of the present invention;
fig. 2 is a right side view of fig. 1 of the present invention.
Fig. 3 is a schematic diagram of the heat pipe low-temperature economizer with the adjustable heat exchange area according to the embodiment of the utility model when the economizer operates at 50% -75% load.
Fig. 4 is a schematic structural diagram of the heat pipe low-temperature economizer with the adjustable heat exchange area, which is disclosed by the embodiment of the utility model, when the economizer operates under the load of 30% -50%.
In the figure: 1. a heat exchange module; 2. an inlet straight section flue; 3. the inlet flue reducer; 4. the outlet flue reducer; 5. an outlet straight section flue; 6. a tube sheet; 7. an inlet right baffle; 8. an outlet right baffle; 9. an inlet left baffle; 10. an outlet left baffle; 11. an inlet right flapper door; 12. an outlet right baffle door; 13. an inlet left flapper door; 14. an outlet left flapper door; 15. an inlet water pipe; 16. a water outlet pipe; 17. an ash hopper; 18. a bin pump; 19. an ash conveying pipeline.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the heat pipe low-temperature economizer with the adjustable heat exchange area comprises a heat exchange module 1, an inlet straight section flue 2, an inlet flue reducer 3, an outlet flue reducer 4 and an outlet straight section flue 5, wherein a flue gas side of the heat exchange module 1 is provided with a pipe plate assembly, and the flue gas side of the heat exchange module 1 is uniformly divided into a plurality of flue gas channels which are not communicated with each other by the pipe plate assembly; the tube plate assembly comprises a first tube plate, … … and an Nth tube plate, wherein N is more than or equal to 1 and is an integer; the flue gas side of the heat exchange module 1 is provided with N tube plates 6 along the direction parallel to the flow direction of the flue gas, the flue gas side of the heat exchange module 1 is uniformly divided into N +1 flue gas channels which are not communicated with each other by the tube plates 6, N is more than or equal to 1, and two ends of each flue gas channel (each column of longitudinal arrows in the figure 1 indicate the flow direction of the flue gas in one flue gas channel) are provided with baffle doors capable of blocking the two ends of the flue gas channel; the inlet straight section flue 2 is arranged at the inlet of the inlet flue reducer 3, the outlet of the inlet flue reducer 3 is connected with one end of the flue gas side of the heat exchange module 1, the inlet of the outlet flue reducer 4 is connected with the other end of the flue gas side of the heat exchange module 1, and the outlet of the outlet flue reducer 4 is connected with the outlet straight section flue 5; a first guide plate and a second guide plate are symmetrically arranged on two sides of an inner cavity of the inlet flue reducer 3, one end of the first guide plate is connected with an inlet of the inlet flue reducer 3, the other end of the first guide plate extends to the end part of one end of a first tube plate, one end of the second guide plate is connected with the inlet of the inlet flue reducer 3, and the other end of the second guide plate extends to the end part of one end of a second tube plate; a third guide plate and a fourth guide plate are symmetrically arranged on two sides of the inner cavity of the outlet flue reducer 4, one end of the third guide plate is connected with the inlet of the outlet flue reducer 4, the other end of the third guide plate extends to the end part of the other end of the first tube plate, one end of the fourth guide plate is connected with the inlet of the outlet flue reducer 4, and the other end of the fourth guide plate extends to the end part of the other end of the second tube plate; the first tube plate and the second tube plate are the same tube plate (N is 1) or different tube plates at symmetrical positions (N is more than or equal to 2); the first guide plate, the second guide plate, the third guide plate and the fourth guide plate are all louver type guide plates.
Specifically, the first guide plate, the second guide plate, the third guide plate and the fourth guide plate are electrically controlled and arc-shaped louver type guide plates capable of swinging, so that the integral control of the louver type guide plates is facilitated. The electric actuating mechanisms of the first guide plate and the second guide plate are arranged at the inlet part of the inlet flue reducer 3, and the electric actuating mechanisms of the third guide plate and the fourth guide plate are arranged at the outlet part of the outlet flue reducer 4.
The specific installation of the flapper door may be: referring to fig. 1, a groove for inserting a damper is formed in the tube plate, the damper can be vertically inserted into the tube plate from two sides perpendicular to the flow direction of the flue gas in the heat exchange module 1 to block or unblock two ends of the flue gas channel, and as shown in fig. 1, the damper can be driven left and right to block or unblock the flue gas channel at two sides. In practice, the flapper door drive system is electrically driven, sealing between the flapper door and the tube sheet.
An ash bucket 17 is arranged at the bottom of the inlet flue reducer 3, a bin pump 18 is arranged at the bottom of the ash bucket 17, and an outlet of the bin pump 18 is connected with an ash conveying pipeline 19. The ash can be collected and removed through an ash hopper 17, a bin pump 18 and an ash conveying pipeline 19, and the ash can be conveyed to an ash yard.
Specifically, the heat exchange module 1 is vertically arranged, the heat exchanger of the heat exchange module 1 is a gravity heat pipe, and the tube type of the gravity heat pipe is a light pipe, a finned pipe or a three-dimensional finned pipe.
Specifically, the heat exchange module 1 is vertically arranged in a horizontal flue at the inlet of the dust remover.
In general, the flue gas side of the heat exchange module 1 is provided with 1-3 tube plates 6 parallel to the flow direction of the flue gas, so that the requirement of adjusting the heat exchange area can be met, and the specific requirement is met;
when one tube plate 6 is provided, the end portions (upper ends as shown in fig. 1) of the first baffle and the second baffle extend to the end portion of one end (lower end as shown in fig. 1) of the tube plate 6, and the end portions (lower ends as shown in fig. 1) of the third baffle and the fourth baffle extend to the end portion of the other end (upper end as shown in fig. 1) of the tube plate 6;
when two tube plates 6 are arranged, the upper end of the first guide plate extends to the end part of the lower end of one tube plate 6, and the lower end of the third guide plate extends to the end part of the upper end of the tube plate 6; the upper end of the second guide plate extends to the end part of the lower end of the other tube plate 6, and the lower end of the fourth guide plate extends to the end part of the upper end of the tube plate 6;
when three tube plates 6 are arranged, referring to fig. 1-4, the three tube plates are respectively marked as a first tube plate, a second tube plate and a third tube plate in sequence, the second tube plate is displaced between the first tube plate and the third tube plate, the end part of the first guide plate extends to the end part of one end of the first tube plate, and the end part of the second guide plate extends to the end part of one end of the third tube plate; the end of the third guide plate extends to the end of the other end of the first tube plate, and the end of the fourth guide plate extends to the end of the other end of the third tube plate.
The working method of the heat pipe low-temperature economizer with the adjustable heat exchange area comprises the following steps:
the first state: when N is more than or equal to 1, the shutters of the first guide plate, the second guide plate, the third guide plate and the fourth guide plate are all opened, and all the baffle doors are all opened; flue gas enters the heat exchange module 1 from the inlet straight section flue 2 and the inlet flue reducer 3, flows through all flue gas channels and exchanges heat, and the flue gas after heat exchange sequentially flows out through the outlet flue reducer 4 and the outlet straight section flue 5;
and a second state: when N is larger than or equal to 1, the shutters of the first guide plate and the third guide plate are opened, and the flue gas channel between the first guide plate and the third guide plate is not blocked by the baffle door; meanwhile, shutters of the second guide plate and the fourth guide plate are closed, and a flue gas channel between the second guide plate and the fourth guide plate is blocked by a baffle door; if a smoke channel is arranged between the first guide plate and the second guide plate, the smoke channel is in a conducting state; flue gas enters the heat exchange module 1 from the inlet straight section flue 2 and the inlet flue large and small head 3, flows through other flue gas channels except the flue gas channel blocked by the baffle door and exchanges heat, and the flue gas after heat exchange sequentially flows out from the outlet flue large and small head 4 and the outlet straight section flue 5;
and a third state: when N is more than or equal to 1, the shutters of the second guide plate and the fourth guide plate are opened, and a flue gas channel between the second guide plate and the fourth guide plate is not blocked by the baffle door; meanwhile, shutters of the first guide plate and the third guide plate are closed, and a flue gas channel between the first guide plate and the third guide plate is blocked by a baffle door; if a smoke channel is arranged between the first guide plate and the second guide plate, the smoke channel is in a conducting state; flue gas enters the heat exchange module 1 from the inlet straight section flue 2 and the inlet flue large and small head 3, flows through other flue gas channels except the flue gas channel blocked by the baffle door and exchanges heat, and the flue gas after heat exchange sequentially flows out from the outlet flue large and small head 4 and the outlet straight section flue 5;
and a fourth state: the state is suitable for the condition that N is more than or equal to 2, shutters of a first guide plate, a second guide plate, a third guide plate and a fourth guide plate of the fourth guide plate are all closed, a flue gas channel between the first guide plate and the third guide plate is not blocked by a baffle door, and a flue gas channel between the second guide plate and the fourth guide plate is not blocked by the baffle door; flue gas enters the heat exchange module 1 from the inlet straight section flue 2 and the inlet flue reducer 3, flows through other flue gas channels except the flue gas channel blocked by the baffle door and exchanges heat, and the flue gas after heat exchange sequentially flows out from the outlet flue reducer 4 and the outlet straight section flue 5.
Examples
Referring to fig. 1 to 4, the present embodiment provides the following technical solutions, taking three tube plates 6 as an example for explanation: the heat pipe low-temperature economizer with the adjustable heat exchange area comprises a heat exchange module 1, an inlet water pipe 15, an outlet water pipe 16, an inlet straight-section flue 2, an inlet flue reducer 3, an outlet flue reducer 4, an outlet straight-section flue 5, an inlet left baffle door 13, an inlet right baffle door 11, an outlet left baffle door 14, an outlet right baffle door 12, an inlet left guide plate 9, an inlet right guide plate 7, an outlet left guide plate 10, an outlet right guide plate 8 and an ash bucket 17; an inlet straight-section flue 2, an inlet flue reducer 3, a heat exchange module 1, an outlet flue reducer 4 and an outlet straight-section flue 5 are arranged in the heat exchange module 1, and referring to fig. 1, an inlet left baffle door 13 and an inlet right baffle door 11 are arranged between the inlet flue reducer 3 and the heat exchange module 1 and are respectively positioned on the left side and the right side of an outlet of the inlet flue reducer 3, an outlet left baffle door 14 and an outlet right baffle door 12 are arranged between the outlet flue reducer 4 and the heat exchange module 1 and are respectively positioned on the left side and the right side of an outlet of the outlet flue reducer 4, the inlet left baffle door 13, the inlet right baffle door 11, the outlet left baffle door 14 and the outlet right baffle door 12 are electric baffles, the insertion depth of the electric baffles is 1/4 with the width of the heat exchange module 1, and the electric baffles can be inserted into a groove on a tube plate 6. When the baffle door is closed, the inlet and the outlet of the left flue gas channel and the inlet and the outlet of the right flue gas channel of the heat exchange module 1 are sealed, and the flue gas does not flow; the inlet left baffle door 13, the inlet right baffle door 11, the outlet left baffle door 14 and the outlet right baffle door 12 are respectively provided with a flexible sealing system to be connected with the reducer and the heat exchange module, so that no smoke leakage is ensured in the opening and closing process; the inlet and the outlet of the heat exchange module 1 are respectively connected with an inlet water pipe 15 and a water outlet pipe 16, and cooling water enters the heat exchange module 1 through the inlet water pipe 15 and finally flows out through the water outlet pipe 16; as shown in FIG. 2, the upper end of the ash hopper 17 is communicated with the bottom of the inlet flue reducer 3, the lower part of the ash hopper 17 is communicated with the bin pump 18, and the bottom of the bin pump is communicated with the ash conveying pipeline 19. Referring to fig. 1, 3 and 4, three tube plates 6 are vertically arranged along the flow direction of flue gas and parallel to the heat exchange tubes of the heat exchange module 1, and the three tube plates 6 divide the flue gas side of the heat exchange module 1 into 4 flue gas channels (4 rows of flue gas channels shown in fig. 1) which are not communicated with each other. Taking the orientation shown in fig. 1 as an example, the inlet left baffle door 13 is transversely inserted from the left side of the lower end of the heat exchange module 1, after the inlet left baffle door 13 is inserted, the lower end of the leftmost flue gas channel can be blocked, and after the inlet left baffle door 13 is pulled out, the lower end of the leftmost flue gas channel is unblocked; the structure of the inlet right baffle door 11 is similar to that of the inlet left baffle door 13 and is symmetrically arranged left and right, and similarly, the inlet right baffle door 11 can block or unblock the lower end of the rightmost flue gas channel; the structure of the outlet left guide plate 10 is similar to that of the inlet left baffle door 13 and is arranged in a symmetrical structure from top to bottom, and similarly, the outlet left guide plate 10 can block or unblock the upper end of the leftmost flue gas channel; the structure of outlet right baffle door 12 is similar to that of inlet right baffle door 11 and is arranged in a symmetrical structure from top to bottom, and similarly, outlet right baffle door 12 can block or unblock the upper end of the rightmost flue gas channel. The inlet left guide plate 9, the inlet right guide plate 7, the outlet left guide plate 10 and the outlet right guide plate 8 are electrically controlled swing arc shutter type guide plates, an electric actuating mechanism is arranged at the tops of the inlet flue reducer 3 and the outlet flue reducer 4 nearby, and the uniformity of a flow field can be adjusted by controlling the swing angles of the inlet left guide plate 9, the inlet right guide plate 7, the outlet left guide plate 10 and the outlet right guide plate 8 when the inlet left guide plate, the inlet right guide plate, the outlet left guide plate 10 and the outlet right guide plate 8 are opened; when the valve is completely closed, the front arc shutter type guide plate and the rear arc shutter type guide plate can be in close contact with each other, and the function of isolating smoke is achieved. Taking the orientation shown in fig. 1 as an example, the lower end of the inlet left guide plate 9 is connected with the left side of the lower port of the inlet flue reducer 3, the upper end of the inlet left guide plate 9 extends to the lower end of the leftmost tube plate 6, and after the shutters on the inlet left guide plate 9 are completely closed, the inlet left guide plate 9 blocks the lower end inlet of the leftmost flue gas channel, so that flue gas cannot enter from the lower end of the leftmost flue gas channel; the lower end of an inlet right guide plate 7 is connected with the right side of a lower port of an inlet flue reducer 3, the upper end of the inlet right guide plate 7 extends to the lower end of a rightmost tube plate 6, and after shutters on the inlet right guide plate 7 are completely closed, the inlet right guide plate 7 blocks the lower end inlet of a rightmost smoke channel, so that smoke cannot enter from the lower end of the rightmost smoke channel; taking the structure shown in fig. 1 as an example, the structures of the outlet left guide plate 10 and the inlet left guide plate 9 are vertically symmetrical, and the structures of the outlet right guide plate 8 and the inlet right guide plate 7 are vertically symmetrical. The inlet left guide plate 9, the inlet right guide plate 7, the outlet left guide plate 10 and the outlet right guide plate 8 are made of high manganese steel or stainless steel with good wear resistance. The heat exchange module 1 is vertically arranged in a horizontal flue at the inlet of the dust remover, the heat exchanger is a gravity heat pipe, and the pipe type adopts a light pipe or a finned pipe or a three-dimensional finned pipe.
The working process of the heat pipe low-temperature economizer with the adjustable heat exchange area comprises the following steps:
when the load of the unit is 75-100%, the shutters of the inlet left baffle 9, the inlet right baffle 7, the outlet left baffle 10 and the outlet right baffle 8 are all opened, and meanwhile, the inlet left baffle door 13, the inlet right baffle door 11, the outlet left baffle door 14 and the outlet right baffle door 12 are all opened, so that the flue gas uniformly flows through 4 channels of the heat exchange module 1 to exchange heat with the medium in the heat exchange module 1, and the purpose of reducing the temperature of the flue gas is achieved.
When the unit load is between 50% and 75%, the method I: the shutters of the inlet left baffle 9 and the outlet left baffle 10 are opened, and the inlet left baffle door 13 and the outlet left baffle door 14 are all opened; meanwhile, shutters of the inlet right baffle 7 and the outlet right baffle 8 are closed, and the right baffle door 11 and the outlet right baffle door 12 are closed; the second method comprises the following steps: the shutters of the inlet left baffle 9 and the outlet left baffle 10 are opened, and the inlet left baffle door 13 and the outlet left baffle door 14 are all opened; simultaneously, the shutters of inlet right baffle 7 and outlet right baffle 8 are closed, and right flapper door 11 and outlet right flapper door 12 are all closed. By the method, the flue gas uniformly flows through the 3 channels of the heat exchange module 1, and at the moment, the effective heat exchange area of the heat pipe low-temperature economizer is adjusted to 75% of the area of the heat exchange module 1, so that the flow rate of the flue gas flowing through the heat exchange module 1 can be kept in a reasonable range, and dust deposition caused by reduction of the flow rate of the flue gas due to load reduction is avoided.
When the unit load is between 30% and 50%, the shutters of the inlet left baffle 9, the inlet right baffle 7, the outlet left baffle 10 and the outlet right baffle 8 are all closed, and meanwhile, the inlet left baffle door 13, the inlet right baffle door 11, the outlet left baffle door 14 and the outlet right baffle door 12 are all closed, so that the flue gas uniformly flows through 2 channels of the heat exchange module 1, the effective heat exchange area of the heat pipe low-temperature economizer is adjusted to be 50% of the area of the heat exchange module 1, the flow rate of the flue gas flowing through the heat exchange module 1 can be ensured to be kept in a reasonable range, and the problem of dust accumulation caused by the reduction of the flow rate of the flue gas due to the reduction of the load is avoided.
An ash hopper 17 arranged at the bottom of the inlet reducer 3 can timely collect the accumulated ash in the reducer to a bin pump 18, and finally the accumulated ash is conveyed to an ash yard through an ash conveying pipeline 19.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A heat pipe low-temperature economizer with an adjustable heat exchange area is characterized by comprising a heat exchange module (1), an inlet straight section flue (2), an inlet flue reducer (3), an outlet flue reducer (4) and an outlet straight section flue (5), wherein a pipe plate assembly is arranged on the flue gas side of the heat exchange module (1), and divides the flue gas side of the heat exchange module (1) into a plurality of flue gas channels which are not communicated with each other; the tube plate assembly comprises a first tube plate, … … and an Nth tube plate, wherein N is more than or equal to 1 and is an integer;
the smoke side of the heat exchange module (1) is provided with N tube plates (6) along the direction parallel to the smoke flowing direction, the smoke side of the heat exchange module (1) is uniformly divided into N +1 smoke channels which are not communicated with each other by the tube plates (6), N is more than or equal to 1, and two ends of each smoke channel are provided with baffle doors capable of blocking the two ends of the smoke channel;
the inlet straight section flue (2) is arranged at the inlet of the inlet flue reducer (3), the outlet of the inlet flue reducer (3) is connected with one end of the flue gas side of the heat exchange module (1), the inlet of the outlet flue reducer (4) is connected with the other end of the flue gas side of the heat exchange module (1), and the outlet of the outlet flue reducer (4) is connected with the outlet straight section flue (5);
a first guide plate and a second guide plate are symmetrically arranged on two sides of an inner cavity of the inlet flue reducer (3), one end of the first guide plate is connected with an inlet of the inlet flue reducer (3), the other end of the first guide plate extends to the end part of one end of a first tube plate, one end of the second guide plate is connected with the inlet of the inlet flue reducer (3), and the other end of the second guide plate extends to the end part of one end of a second tube plate;
a third guide plate and a fourth guide plate are symmetrically arranged on two sides of an inner cavity of the outlet flue reducer (4), one end of the third guide plate is connected with an inlet of the outlet flue reducer (4), the other end of the third guide plate extends to the end part of the other end of the first tube plate, one end of the fourth guide plate is connected with the inlet of the outlet flue reducer (4), and the other end of the fourth guide plate extends to the end part of the other end of the second tube plate;
the first tube plate and the second tube plate are the same tube plate or different tube plates which are in symmetrical positions;
the first guide plate, the second guide plate, the third guide plate and the fourth guide plate are all louver type guide plates.
2. The heat pipe low-temperature economizer with the adjustable heat exchange area as claimed in claim 1, wherein the first guide plate, the second guide plate, the third guide plate and the fourth guide plate are electrically controlled swing arc shutter type guide plates, electric actuators of the first guide plate and the second guide plate are installed at an inlet part of the inlet flue reducer (3), and electric actuators of the third guide plate and the fourth guide plate are installed at an outlet part of the outlet flue reducer (4).
3. The heat pipe low-temperature economizer with the adjustable heat exchange area as claimed in claim 1, wherein the tube plate is provided with a groove for inserting a baffle door, and the baffle door can be vertically inserted into the tube plate from two sides perpendicular to the flow direction of the flue gas in the heat exchange module (1) to block two ends of the flue gas channel or to unblock two ends of the flue gas channel.
4. A heat pipe low temperature economizer with adjustable heat exchange area as claimed in claim 3 wherein the driving system of the baffle door is electrically driven, and the baffle door is sealed with the tube plate.
5. The heat pipe low-temperature economizer with the adjustable heat exchange area as claimed in claim 1, wherein an ash hopper (17) is arranged at the bottom of the reducer (3) of the inlet flue, a bin pump (18) is arranged at the bottom of the ash hopper (17), and an outlet of the bin pump (18) is connected with an ash conveying pipeline (19).
6. The heat pipe low-temperature economizer with the adjustable heat exchange area as claimed in claim 1, wherein the heat exchange module (1) is arranged vertically, the heat exchanger of the heat exchange module (1) is a gravity heat pipe, and the tube type of the gravity heat pipe is a light pipe, a finned pipe or a three-dimensional ribbed pipe.
7. The heat pipe low-temperature economizer with the adjustable heat exchange area as claimed in claim 1, characterized in that the heat exchange module (1) is vertically arranged in the horizontal flue at the inlet of the dust remover.
8. The heat pipe low-temperature economizer with the adjustable heat exchange area as claimed in claim 1, wherein 1-3 tube plates (6) are arranged on the flue gas side of the heat exchange module (1) along the direction parallel to the flow direction of the flue gas;
when three tube plates (6) are arranged, the three tube plates are respectively marked as a first tube plate, a second tube plate and a third tube plate in sequence, the second tube plate is displaced between the first tube plate and the third tube plate, the end part of the first guide plate extends to the end part of one end of the first tube plate, and the end part of the second guide plate extends to the end part of one end of the third tube plate; the end of the third guide plate extends to the end of the other end of the first tube plate, and the end of the fourth guide plate extends to the end of the other end of the third tube plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220421049.4U CN216897260U (en) | 2022-02-25 | 2022-02-25 | Heat pipe low-temperature economizer with adjustable heat exchange area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220421049.4U CN216897260U (en) | 2022-02-25 | 2022-02-25 | Heat pipe low-temperature economizer with adjustable heat exchange area |
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| CN216897260U true CN216897260U (en) | 2022-07-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115727532A (en) * | 2022-11-22 | 2023-03-03 | 无锡恒业电热电器有限公司 | High-efficiency micro-channel heater |
-
2022
- 2022-02-25 CN CN202220421049.4U patent/CN216897260U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115727532A (en) * | 2022-11-22 | 2023-03-03 | 无锡恒业电热电器有限公司 | High-efficiency micro-channel heater |
| CN115727532B (en) * | 2022-11-22 | 2023-12-08 | 无锡恒业电热电器有限公司 | High-efficiency micro-channel heater |
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