CN212458074U - Flue gas heat collector - Google Patents

Abstract

The utility model discloses a flue gas heat collector, which comprises a heat exchange module, wherein the heat exchange module comprises a plurality of rows of heat exchange tube assemblies, and one row of the heat exchange tube assemblies comprises a plurality of heat exchange tube assemblies which are sequentially arranged along a first direction; the heat exchange tube assembly comprises a heat tube and an outer sleeve, one part of each heat tube is inserted into the corresponding outer sleeve, two ends of the outer sleeve are hermetically connected with the heat tube, and cooling water can flow between the inner wall of the outer sleeve and the outer wall of the corresponding heat tube; in each row of the heat exchange tube assembly, the outer sleeves are sequentially communicated with one another in an up-down alternating mode along a first direction. The utility model discloses heat exchange module includes multirow heat exchange tube assembly among the flue gas heat collector, and the outer tube of each row heat exchange tube assembly communicates from top to bottom in turn in proper order, and so each row heat exchange tube assembly all can form snakelike labyrinth runner, and adjacent heat exchange tube assembly's outer tube internal cooling rivers are to opposite to can effectively improve heat transfer capacity.

Description

Flue gas heat collector

Technical Field

The utility model relates to a heat transfer technical field, concretely relates to flue gas heat collector.

Background

The low-temperature electric dust removal technology is popularized and applied in a large scale in the ultra-low emission reconstruction and newly-built units of coal-fired units in recent years in China, the low-temperature coal economizer is used as a specific flue gas heat exchanger, the effective recycling of flue gas waste heat can be realized, the dust removal efficiency can be effectively improved and the synergistic capturing of sulfur trioxide in flue gas can be realized by arranging the low-temperature coal economizer in front of the electric dust remover, and the low-temperature electric dust removal technology is a flue gas heat removal and energy-saving environment-friendly technology which is very in line with national policies.

At present, there is a heat pipe gas cooler, this heat pipe gas cooler includes the casing, be equipped with many vacuum heat pipes of installing the working medium in the casing, the upper portion overcoat of every heat pipe has the sleeve pipe, all sheathed tube upper ends all communicate the upper portion header, the lower extreme all communicates the lower part header, the cooling water flows into the upper portion header, and to each sleeve pipe, then be in between the intraductal wall of cover and the heat pipe outer wall that corresponds, absorb the working medium heat on heat pipe upper portion, the working medium is exothermic the back condensation and flows to the evaporation zone of heat pipe lower part again, continue to absorb the heat of flue gas, the cooling water after the heat absorption then flows from the lower part header. However, the heat exchange efficiency of the scheme is difficult to further improve.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a flue gas heat collector, which comprises a heat exchange module, wherein the heat exchange module comprises a plurality of rows of heat exchange tube assemblies, and one row of the heat exchange tube assemblies comprises a plurality of heat exchange tube assemblies which are sequentially arranged along a first direction; the heat exchange tube assembly comprises a heat tube and an outer sleeve, one part of each heat tube is inserted into the corresponding outer sleeve, two ends of the outer sleeve are hermetically connected with the heat tube, and cooling water can flow between the inner wall of the outer sleeve and the outer wall of the corresponding heat tube; in each row of heat exchange tube assemblies, a plurality of outer sleeves are sequentially communicated in an up-down alternating mode in the first direction.

Optionally, both ends of the heat pipe and the outer sleeve are hermetically welded.

Optionally, two ends of the outer sleeve are provided with an extruded conical closing-in structure, and the inner diameter of the conical closing-in structure is equal to or slightly larger than the outer diameter of the heat pipe.

Optionally, the heat exchange module further comprises an inlet pipe and outlet pipes, each row of the heat exchange pipe assemblies comprises end heat exchange pipe assemblies respectively located at two ends of the first direction, outer sleeves of all the end heat exchange pipe assemblies located at one end in the heat exchange pipe assemblies are all communicated with the inlet pipe, and outer sleeves of all the end heat exchange pipe assemblies located at the other end are all communicated with the outlet pipes.

Optionally, the flue gas heat extractor comprises a heat exchange portion, the heat exchange portion comprises at least one row of the heat exchange modules, and each row of the heat exchange modules comprises at least one heat exchange module; and the heat exchange modules in each row of the heat exchange modules are arranged along a second direction perpendicular to the first direction, and a plurality of rows of the heat exchange modules are arranged along the first direction.

Optionally, the flue gas flows in the first direction, and the flow direction is opposite to the overall flow direction of the cooling water in the row of heat exchange tube assemblies.

Optionally, the flue gas cooler further comprises an inlet manifold and an outlet manifold; the heat exchange part comprises a plurality of rows of heat exchange modules, the inlet pipes of all the heat exchange modules in the foremost row are communicated with the inlet header pipe, the outlet pipes of all the heat exchange modules in the rearmost row are communicated with the outlet header pipe, and the inlet pipe of one heat exchange module is communicated with the outlet pipe of the other heat exchange module in adjacent rows in a one-to-one correspondence manner; or, the heat exchange part comprises a row of heat exchange modules, the inlet pipes of all the heat exchange modules are communicated with the inlet header pipe, and the outlet pipes of all the heat exchange modules are communicated with the outlet header pipe.

Optionally, the heat pipe and the outer sleeve are arranged obliquely.

Optionally, the angle of inclination is 0-15 degrees.

Optionally, the heat exchange module further comprises a plurality of groove-shaped partition plates, and each groove-shaped partition plate extends along the first direction; one row many of heat exchange tube assembly the heat pipe runs through corresponding one the cell type baffle, the heat pipe is located the part below the cell type baffle is its evaporation zone.

Optionally, the flue gas heat collector still includes the wisdom control unit, the real-time collection of wisdom control unit the operating data of flue gas heat collector to carry out contrastive analysis with the benchmark data who sets for, when judging after the intelligent computation that current operating data and predetermined benchmark data appear great deviation, send out equipment trouble early warning.

Optionally, the flue gas heat extractor further comprises an online temperature measuring unit for detecting the temperature of the condensation section of the heat pipe.

The utility model discloses heat exchange module includes multirow heat exchange tube assembly among the flue gas heat collector, and the outer tube of each row heat exchange tube assembly communicates from top to bottom in turn in proper order, and so each row heat exchange tube assembly all can form snakelike labyrinth runner, and adjacent heat exchange tube assembly's outer tube internal cooling rivers are to opposite to can effectively improve heat transfer capacity.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a flue gas heat collector provided by the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is an enlarged view of a portion a in fig. 1.

FIG. 4 is a schematic view of one of the heat exchange tube assemblies of FIG. 1;

FIG. 5 is a schematic view of an upper heat exchanging part of the casing of FIG. 1;

FIG. 6 is a schematic view of an upper portion of one of the heat exchange modules of FIG. 5;

fig. 7 is an enlarged view of a portion B in fig. 5.

FIG. 8 is a schematic view of the flow of working fluid within a vertically disposed heat pipe;

FIG. 9 is a schematic view of the flow of working fluid within an obliquely arranged heat pipe.

The reference numerals in fig. 1-9 are illustrated as follows:

101-inlet smoke box; 102-a housing; 103-an outlet smoke box;

20-an ash removal unit;

30-a heat exchange module; 301-an inlet tube; 302-an outlet pipe; 303-heat exchange tube assembly; 303 a-outer sleeve; 303 ba-liquid film; 303 b-a heat pipe; 303b 1-condensation section; 303b 2-evaporation section; 303b 3-fins; 304-trough type baffles; 305-connecting tube; 306-a water discharge pipe; 307-a drain pipe;

40-an online temperature measuring unit;

50-a smart control unit;

601-inlet manifold; 602-an outlet manifold;

70-connecting pipe;

80-dust flow uniform distribution unit.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-2, fig. 1 is a schematic structural view of an embodiment of a flue gas heat collector provided by the present invention; FIG. 2 is a top view of FIG. 1; FIG. 3 is an enlarged view of portion A of FIG. 1; fig. 4 is a schematic view of one heat exchange tube assembly 303 of fig. 1.

As shown in fig. 1, the flue gas cooler comprises a housing 102, and an inlet smoke box 101 and an outlet smoke box 103 located at both ends of the housing 102, wherein flue gas enters the housing 102 through the inlet smoke box 101 and flows out of the outlet smoke box 103. At least one of the inlet smoke box 101, the housing 102, and the outlet smoke box 103 may be provided with a soot cleaning unit 20 to clean the deposition of particulate matter in the flue gas.

The flue gas heat collector can be arranged on a flue gas channel for recovering flue gas waste heat, and for this reason, the flue gas heat collector comprises a heat exchanging part, the heat exchanging part comprises at least one heat exchanging module 30, and the heat exchanging part shown in fig. 2 comprises ten heat exchanging modules 30. The heat exchange module 30 includes a plurality of rows of heat exchange tube assemblies 303, and a row of heat exchange tube assemblies 303 includes a plurality of heat exchange tube assemblies 303 arranged in sequence, and the arrangement direction of a row of heat exchange tube assemblies 303 is defined as a first direction, which may be a linear direction as shown in fig. 2, or may not be a straight line. As shown in fig. 4, a heat exchange tube assembly 303 includes a heat pipe 303b and an outer sleeve 303a, a portion of each heat pipe 303b is inserted into the corresponding outer sleeve 303a, and both ends of the outer sleeve 303a are connected to the heat pipe 303b in a sealing manner, as shown in fig. 3, a cooling chamber is formed between an inner wall of the outer sleeve 303a and an outer wall of the corresponding heat pipe 303b, and cooling water can flow through the cooling chamber. As shown in fig. 4, the length of the heat pipe 303b is greater than that of the outer sleeve 303a, the lower part of the heat pipe 303b is located in the shell 102 of the flue gas heat extractor, and the upper part of the heat pipe 303b is located above the shell 102. When the ash removal unit 20 is disposed on the housing 102, not only the ash on the housing 20 but also the ash on the heat pipe 303b can be removed.

Referring to fig. 3, the upper portion of the heat pipe 303b is almost inserted into the outer sleeve 303a, the portion of the heat pipe 303b inserted into the outer sleeve 303a may be defined as a condensation section 303b1, the portion of the housing 102 for exchanging heat with the high temperature flue gas may be defined as an evaporation section 303b2, and a plurality of fins 303b3 may be further provided on the outer wall of the evaporation section 303b2 in order to improve the heat exchange efficiency of the evaporation section 303b 2.

As can be further understood with reference to fig. 5 and 6, fig. 5 is a schematic view of an upper heat exchanging portion of the housing 102 of fig. 1; fig. 6 is a schematic view of the upper portion of one heat exchange module 30 of fig. 5.

In the view of the heat exchange module 30 in fig. 6, only the upper part of one row of heat exchange tube assemblies 303 is shown, and the lower part of the heat pipe 303b is not shown, in this embodiment, in each row of heat exchange tube assemblies 303, a plurality of outer sleeves 303a are alternately communicated up and down in sequence along the arrangement direction of the heat exchange tube assemblies 303. That is, in each row of heat exchange tube assemblies 303, the upper end of one outer sleeve 303a is communicated with the upper end of the adjacent outer sleeve 303a, the lower end of the outer sleeve 303a is communicated with the lower end of the adjacent other outer sleeve 303a, and the outer sleeves 303a at the two ends are connected in a manner that one end is communicated with the corresponding end of the adjacent outer sleeve 303a, and the other end is used as an inlet or an outlet of cooling water. In this way, a plurality of outer sleeves 303a in a row of heat exchange tube assemblies 303 are arranged side by side and are connected in series in an up-and-down alternate communication mode, a serpentine flow channel is formed in the row of heat exchange assemblies shown in fig. 6, the cooling water in the adjacent outer sleeves 303a flows in opposite directions, and the arrows in the outer sleeves 303a indicate the flow directions of the cooling water. The upper or lower ends of adjacent outer sleeves 303a may be connected by a connecting tube 305.

So set up, heat exchange module 30 includes multirow heat exchange tube assembly 303, and each row of heat exchange tube assembly 303 forms snakelike labyrinth runner, and the cooling water flow direction in the outer tube 303a of adjacent heat exchange tube assembly 303 is opposite, improves the relative difference in temperature to can effectively improve heat transfer ability.

In addition, as shown in fig. 1, the flue gas enters and leaves the flue gas heat extractor from left to right, and the cooling water can flow into and out of the heat exchanging part from right to left, i.e. the flow direction of the flue gas is completely opposite to the overall flow direction of the cooling water, and the cooling water is in a counter-flow state relative to the flue gas, so that the comprehensive heat exchange capacity is further improved.

As shown in fig. 2, the heat exchange module 30 further comprises an inlet pipe 301 and an outlet pipe 302, each row of heat exchange tube assemblies 303 comprises end heat exchange tube assemblies 303 respectively located at two ends, the outer sleeves 303a of all the end heat exchange tube assemblies 303 located at one end in the rows of heat exchange tube assemblies 303 are communicated with the inlet pipe 301, and the outer sleeves 303a of all the end heat exchange tube assemblies 303 located at the other end are communicated with the outlet pipe 302. Thus, one inlet pipe 301 can provide cooling water to all rows of heat exchange pipe assemblies 303 of one heat exchange module 30, and the cooling water in the outer sleeves 303a of all rows of heat exchange pipe assemblies 303 flows out through one outlet pipe 302. Such a heat exchange module 30 only needs to be provided with one inlet pipe 301 and one outlet pipe 302, which is convenient for controlling the inlet and outlet of cooling water, and can also greatly save materials, and of course, each row can be controlled by adopting a separate inlet and outlet pipe.

With continued reference to fig. 3, the heat pipe 303b and the two ends of the outer sleeve 303a are preferably hermetically welded to form a sealed connection, which is reliable and easy to implement. Of course, other ways of achieving a sealed connection are possible, such as providing a seal or the like. As shown in fig. 3, specifically, two ends of the outer sleeve 303a may be formed by extrusion to form a conical closing-in structure, and an inner diameter of the conical closing-in structure is equal to or slightly larger than an outer diameter of the heat pipe 303b, so that the outer sleeve 303a and the heat pipe 303b are easy to pre-position after being preliminarily sleeved, and the conical closing-in structure is tightly attached to an outer wall of the heat pipe 303b or has a small gap after being sleeved, so that the welding operation is easy to be performed on a connection position.

In addition, referring to fig. 7, fig. 7 is an enlarged view of a portion B in fig. 5.

As shown in fig. 6, since the heat exchange tube assemblies 303 are sequentially and alternately communicated from top to bottom, the lower ends of the heat exchange tube assemblies 303 are not communicated at intervals, at this time, a thin tube can be arranged as the water discharge tube 306 to communicate two adjacent outer sleeves 303a of which the lower ends are not communicated, and the water discharge tube 306 is thin and has a diameter far smaller than that of the connecting tube 305 at the lower end, so that the serpentine flow direction of the cooling water during operation is not influenced. However, when the apparatus stops operating and the water stored in the heat pipe 303a needs to be discharged, the lower ends of all the outer sleeves 303a in a row form a water path at the lower end through the water discharge pipe 306 and the connection pipe 305, which is beneficial to completely discharging the water stored in the outer sleeve 303 a. Fig. 7 shows a drain pipe 307 and a drain valve for controlling the opening and closing of a drain port of the drain pipe 307.

With continued reference to fig. 2, the heat exchange portion includes at least one row of heat exchange modules 30, each row of heat exchange modules 30 includes at least one heat exchange module 30, and the one row of heat exchange modules 30 is distributed along the arrangement direction of the plurality of rows of heat exchange tube assemblies 303 in the heat exchange module 30. In fig. 2, the heat exchange portion includes two rows of heat exchange modules 30 distributed left and right, one row includes five heat exchange modules 30 distributed up and down, multiple rows of heat exchange tube assemblies 303 in each heat exchange module 30 are also distributed up and down, and sixteen rows of heat exchange tube assemblies 303 are distributed, in fig. 6, each row of heat exchange tube assemblies 303 includes fourteen heat exchange tube assemblies 303, of course, the number setting is only a specific example, and the specific heat exchange portion composition specification can be determined according to factors such as specific heat exchange requirements and setting space. In fig. 2, the arrangement direction of the multiple rows of heat exchange modules 30 is consistent with the flow direction of the flue gas, the two rows of heat exchange modules 30 are distributed from left to right, and the inlet and outlet of the flue gas and the inlet and outlet of the cooling water are both in the left-right direction; the arrangement direction of the heat exchange modules 30 of each row of heat exchange modules 30 is perpendicular to the flow direction of the flue gas, and the arrangement directions are all located in the horizontal plane and can be distributed in the vertical plane.

As shown in fig. 2, the flue gas heat extractor in this embodiment may further include an inlet header pipe 601 and an outlet header pipe 602, the inlet pipes 301 of the foremost row of heat exchange modules 30 are all connected to the inlet header pipe 601, and the outlet pipes 302 of the rearmost row of heat exchange modules 30 are all connected to the outlet header pipe 602, where foremost and rearmost refer to the rows of heat exchange modules at both ends of the heat exchange portion. In addition, in the adjacent rows of heat exchange modules 30, the inlet pipe 301 of one of the heat exchange modules is in one-to-one correspondence with the outlet pipe 302 of the other heat exchange module, and specifically, the inlet pipe 301 and the outlet pipe 302 of one of the heat exchange modules can be directly communicated through the connecting pipe 70 shown in fig. 2, and of course, when only one row of heat exchange modules 30 is provided, all the inlet pipes 301 and the outlet pipes 302 at the two ends of the row of heat exchange modules 30 are respectively communicated with the inlet header pipe.

So set up, then realized that whole heat transfer portion can realize the inflow and the outflow of cooling water through an inlet manifold 601 and an outlet manifold 602, though, a plurality of outer tubes 303a that one row of heat transfer module 30 is located the tip can be connected to inlet manifold 601, outlet manifold 602 simultaneously, but the mode that sets up of this embodiment is favorable to the increase and decrease of each heat transfer module 30, maintenance, the business turn over control of cooling water. For example, when any one of the two heat exchange modules 30 connected in series at the bottom in fig. 2 fails, the inlet manifold 601, the outlet manifold 602, and the two heat exchange modules 30 may be shut down, and the rest of the heat exchange modules 30 may still operate normally.

With continuing reference to fig. 6 in conjunction with fig. 8 and 9, fig. 8 is a schematic diagram illustrating the working medium flowing in the vertically arranged heat pipe 303 b; fig. 9 is a schematic view showing the flow of the working medium in the obliquely arranged heat pipe 303 b.

The heat exchange tube assembly 303 is disposed obliquely, that is, both the heat tube 303b and the outer sleeve 303a are disposed obliquely. As described above, in this embodiment, the heat pipe 303b of the heat exchange pipe assembly 303 includes the condensation section 303b1 and the evaporation section 303b2, the condensation section 303b1 is located in the outer sleeve 303a, the flue gas contacts with the evaporation section 303b2 below, the working medium is provided in the heat pipe 303b and keeps vacuum in the heat pipe 303b, the evaporation section 303b2 contacts with the high-temperature flue gas and transfers heat to the working medium, the working medium absorbs heat and rapidly evaporates and changes phase into steam under vacuum atmosphere, the condensation section 303b1 automatically ascends upward under the action of the pressure difference between upper and lower sides, after flowing to the condensation section 303b1 above, the heat is continuously transferred to the cooling water through the pipe wall to release heat, and the working medium condenses into liquid and then returns to the evaporation section 303b2 downward. Each heat pipe 303b is independently arranged, the evaporation section 303b2 is positioned in the smoke, and the situation of being abraded by particles in the smoke exists, when a certain evaporation section 303b2 is abraded by the smoke particles, working media inside the heat pipe 303b can be leaked into the smoke, but because cooling water is isolated at the outer side of the pipe by the condensation section 303b1 positioned above the smoke, the continuous leakage of the cooling water into the smoke can not be caused, the leakage of the cooling water can be reduced and even avoided, and zero leakage is favorably realized. In addition, the cooling water after absorbing heat can be delivered to the required occasions to achieve the purposes of reducing the smoke temperature and recovering the waste heat of the smoke, and the smoke after being cooled finally flows out of the outlet smoke box 103 and flows to downstream equipment.

As shown in fig. 8, when the heat pipe 303b and the outer sleeve 303a are vertically arranged, and the working medium in the heat pipe 303b flows back from the condensation section 303b1, the liquid film 303ba formed in the heat pipe 303b is relatively uniformly distributed on the circumferential inner wall of the heat pipe 303b, which causes a large thermal resistance. As shown in fig. 9, when the heat pipe 303b and the outer sleeve 303a are both disposed obliquely, in the process that the working medium flows downward after being condensed, based on the gravity, the liquid film 303ba will be more concentrated on the oblique side, i.e. the liquid film 303ba will flow along the inner wall of the lower side of the oblique side, as shown in fig. 9, i.e. the liquid film 303ba will be more concentrated on the inner wall of the condensation section 303b1 near the right side, and the occupied inner wall area is smaller, so that the thermal resistance is reduced, and the heat exchange effect is better.

Of course, the inclination angle is not necessarily too large, and preferably, the inclination angle may be 0 to 15 degrees, that is, greater than 0 degree and less than or equal to 15 degrees, and the inclination angle is an angle with the vertical plane. Therefore, the purpose of reducing thermal resistance can be achieved, and the rising capacity of steam formed after the working medium is evaporated is also considered. Of course, the inclination angle is not limited in detail, and can be flexibly adjusted according to the site conditions of the actual engineering project. Further, the heat exchange tube assembly 303 is shown as being inclined to the right in fig. 6, it being understood that the inclination may be in any direction, such as to the left, or may be inclined inwardly or outwardly of the plane of the paper.

As will be understood from fig. 1 and 3, the heat exchange module 30 further includes a plurality of groove-shaped partitions 304, the groove-shaped partitions 304 extend along a first direction, openings of the groove-shaped partitions 304 face upward, the heat pipes 303b of the heat exchange pipe assemblies 303 of each row penetrate through one groove-shaped partition 304, and when the view angle of fig. 2 is taken as a perspective view, the arrangement direction of the heat exchange pipe assemblies 303 of one row of the heat exchange pipe assemblies 303 is defined as a first direction, i.e., a left-right direction of fig. 2, the arrangement direction of the heat exchange pipe assemblies 303 of a plurality of rows is defined as a second direction, i.e., an up-down direction of fig. 2, the extension direction of the groove-shaped partitions 304 is the same as the arrangement direction of the heat exchange pipe assemblies 303 of one row, and the groove-shaped partitions 304 are distributed along the second direction, it can be seen. Meanwhile, the adjacent groove-shaped partition plates 304 can be hermetically connected, for example, hermetically welded and fixed, as shown in fig. 3, the side walls of the adjacent groove-shaped partition plates 304 are fitted and welded, so that all the groove-shaped partition plates 304 are connected into a whole, the whole heat exchange module 30 can be vertically partitioned, flue gas can flow below the groove-shaped partition plates 304, all the outer sleeves 303a of the heat exchange module 30 are located above the groove-shaped partition plates 304, as shown in fig. 3, and the part of the heat pipe 303b located above the groove-shaped partition plates 304 is basically the condensation section 303b 1.

At this time, the flue gas can only pass below the groove-shaped partition plate 304 and cannot penetrate above the groove-shaped partition plate 304, and the cooling water above the flue gas cannot penetrate below the groove-shaped partition plate 304, namely the flue gas side; in addition, the cooling water is sealed inside the outer sleeve 303a of the heat pipe 303b, and the cooling water cannot pass through the outer sleeve 303a to reach the groove-shaped partition plate 304 and enter the flue gas during actual operation. Therefore, the gas-water separation of the heat exchanging part of the flue gas heat collector in the embodiment is safer, has double isolation functions, and is easier to ensure that cooling water cannot leak into flue gas during normal operation.

The above groove-type partition 304 is a specific example, and it is understood that a layer of integral partition may be directly provided, and a plurality of heat pipes 303b may penetrate through the partition and be hermetically connected. Obviously, the arrangement of the plurality of groove-shaped partition plates 304 can improve the structural strength of the heat exchange module, and the heat exchange tube assemblies 303 are easier to connect, so that a row of integrated heat exchange tube assemblies 303 is formed, and then a plurality of rows of heat exchange tube assemblies 303 are fixed into a module, namely the heat exchange module 30, by welding the groove-shaped partition plates 304.

As shown in fig. 1, the flue gas heat extractor in this embodiment is further provided with an intelligent control unit 50, which can collect the operation data of the flue gas heat extractor in real time, compare and analyze the operation data with the preset reference data, and send out an equipment failure warning when it is determined that the current operation data has a large deviation from the preset reference data after intelligent calculation, and can push the warning information to the operation and maintenance staff in a mobile manner such as a short message or a WeChat for timely processing. The operation data may specifically include boiler load, flue gas amount, soot blowing frequency of the SCR/air preheater/flue gas cooler, inlet and outlet flue gas temperature of the flue gas cooler, inlet and outlet water temperature of cooling water, inlet and outlet pressure difference, wall temperature at the end of the condensation section 303b1 of the heat pipe 303b, and the like. The intelligent control unit 50 can be connected with a factory monitoring management system to realize the control of the life cycle management of the flue gas heat collector. Therefore, the intelligent control unit 50 and the corresponding data monitoring unit can combine big data, internet +, internet of things with online monitoring and fault diagnosis technology, and realize deep energy-saving operation and health management of equipment.

With continuing reference to fig. 1, the flue gas heat extractor is further provided with an online temperature measuring unit 40, which can perform online detection and data analysis processing on the operating temperature of the heat pipe 303b, specifically, can detect the temperature of the end of the condensation section 303b1 of the heat pipe 303b, the temperature change of the end of the heat pipe 303b is constant under a certain vacuum degree, and when the temperature has a large variation deviation, the vacuum degree is changed, so that whether the heat pipe 303b fails or not can be monitored. Therefore, the online temperature measuring unit 40 can master the working condition of the heat pipe 303b at any time, guide the operation management and maintenance work of the equipment in time and ensure the normal use effect of the equipment.

As shown in fig. 1, the flue gas heat extractor in the present solution may further be provided with a dust flow uniform distribution unit 80, and the dust flow uniform distribution unit 80 is arranged in the inlet smoke box 101, which is beneficial to realizing uniform flow of flue gas, so as to uniformly flow to the lower part of the heat pipe 303b of the heat exchanging part, thereby improving heat exchanging efficiency.

The dust flow distribution unit 90 may be formed of a multi-directional flap assembly and be compositely designed with a plurality of delta wings. The multi-directional folded plates are welded into a whole in a mutually crossed mode according to a certain distance and angle according to a computer numerical simulation result, and the triangular wings are welded on the folded plates close to the smoke outlet end in an inclined mode. After the flue gas passes through the dust flow uniform distribution unit 80, the multidirectional folded plates can realize uniform distribution of a flue gas flow field on the cross section of the whole flue, so that the heat exchange effect is improved, the triangular wings can realize uniform distribution of dust particle concentration in an inlet space of the flue gas heat exchanger, and the flue gas heat exchanger is prevented from being scoured and abraded due to the fact that the dust concentration is locally too high. The multi-directional flap assembly and the delta wing of the dust flow distribution unit 80 may be made of wear-resistant alloy. In addition, in a special narrow application occasion, the dust flow uniform distribution unit 80 can also adopt a structure of a perforated plate or a combination of the perforated plate and a guide plate, and can realize uniform distribution of air flow.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (12)

1. The flue gas heat extractor is characterized by comprising a heat exchange module (30), wherein the heat exchange module (30) comprises a plurality of rows of heat exchange tube assemblies (303), and each row of heat exchange tube assemblies (303) comprises a plurality of heat exchange tube assemblies (303) which are sequentially arranged along a first direction; the heat exchange tube assembly (303) comprises a heat tube (303b) and an outer sleeve (303a), a part of each heat tube (303b) is inserted into the corresponding outer sleeve (303a), two ends of the outer sleeve (303a) are hermetically connected with the heat tube (303b), and cooling water can flow between the inner wall of the outer sleeve (303a) and the outer wall of the corresponding heat tube (303 b); in each row of the heat exchange tube assemblies (303), a plurality of outer sleeves (303a) are sequentially communicated up and down alternately along the first direction.

2. The flue gas cooler of claim 1, wherein the ends of the heat pipe (303b) and the outer sleeve (303a) are hermetically welded.

3. The flue gas heat collector of claim 2, wherein the two ends of the outer sleeve (303a) are formed by extrusion-molded conical closing structures, and the inner diameter of the conical closing structures is equal to or slightly larger than the outer diameter of the heat pipe (303 b).

4. A flue gas cooler according to any one of claims 1 to 3, wherein the heat exchange module (30) further comprises an inlet pipe (301) and an outlet pipe (302), each row of the heat exchange tube assemblies (303) comprises end heat exchange tube assemblies (303) respectively located at two ends in the first direction, the outer sleeves (303a) of all the end heat exchange tube assemblies (303) located at one end in the rows of the heat exchange tube assemblies (303) are communicated with the inlet pipe (301), and the outer sleeves (303a) of all the end heat exchange tube assemblies (303) located at the other end are communicated with the outlet pipe (302).

5. The flue gas heat extractor according to claim 4, wherein the flue gas heat extractor comprises a heat exchanging part, the heat exchanging part comprises at least one row of the heat exchanging modules (30), each row of the heat exchanging modules (30) comprises at least one heat exchanging module (30); the heat exchange modules (30) in each row of heat exchange modules (30) are arranged along a second direction perpendicular to the first direction, and a plurality of rows of heat exchange modules (30) are arranged along the first direction.

6. The flue gas cooler of claim 5, wherein flue gas flows in the first direction and in a direction opposite to the direction of the overall flow of cooling water in the row of heat exchange tube assemblies (303).

7. The flue gas cooler according to claim 5, further comprising an inlet manifold (601) and an outlet manifold (602); the heat exchange part comprises a plurality of rows of heat exchange modules (30), the inlet pipes (301) of all the heat exchange modules (30) at the forefront are communicated with the inlet header pipe (601), the outlet pipes (302) of all the heat exchange modules (30) at the rearmost are communicated with the outlet header pipe (602), and in the adjacent rows of heat exchange modules (30), the inlet pipe (301) of one heat exchange module is communicated with the outlet pipe (302) of the other heat exchange module in a one-to-one correspondence manner; or, the heat exchange part comprises a row of heat exchange modules (30), the inlet pipes (301) of all the heat exchange modules (30) are communicated with the inlet header pipe (601), and the outlet pipes (302) of all the heat exchange modules (30) are communicated with the outlet header pipe (602).

8. A flue gas cooler according to any of claims 1-3, wherein the heat pipe (303b) and the outer sleeve (303a) are arranged obliquely.

9. The flue gas cooler of claim 8, wherein the angle of inclination is 0-15 degrees.

10. A flue gas cooler according to any of claims 1-3, wherein the heat exchange module (30) further comprises a plurality of groove-shaped partitions (304), each groove-shaped partition (304) extending in the first direction; and a plurality of heat pipes (303b) of the heat exchange pipe assembly (303) in one row penetrate through the corresponding groove-shaped partition plate (304), and the part of the heat pipe (303b) below the groove-shaped partition plate (304) is an evaporation section (303b2) of the heat pipe.

11. The flue gas heat collector of any one of claims 1 to 3, further comprising an intelligent control unit (50), wherein the intelligent control unit (50) collects the operation data of the flue gas heat collector in real time, compares the operation data with the preset reference data for analysis, and sends out an equipment fault warning when the current operation data is judged to have a larger deviation from the preset reference data after intelligent calculation.

12. The flue gas cooler according to any of the claims 1-3, further comprising an online temperature measuring unit (40) for detecting the temperature of the condensing section (303b1) of the heat pipe (303 b).

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