Heat supply network heater with heat supply network drainage waste heat recovery structure

Abstract

The utility model discloses a heat supply network heater with a heat supply network drainage waste heat recovery structure, which comprises two groups of support frames and a heat supply network heater main body arranged on the two groups of support frames, the top of the heat supply network heater main body is connected with a steam inlet, and a heat exchange mechanism is arranged in the heat supply network heater main body. One end of the heating network heater main body is connected with a water chamber through a flange plate, the top of the water chamber is communicated with a water outlet pipe, and the bottom of the water chamber is communicated with an L-shaped water inlet pipe. The drain water generated in the heating network heater can be drained into the heat exchange coil pipe, cold water in the water inlet pipeline exchanges heat with the drain water through the heat exchange coil pipe, namely the cold water just entering the water inlet pipeline is preheated, the purpose of recycling heat energy of the drain water is achieved, and the heating efficiency of the heating network heater is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heating network heaters, in particular to a heating network heater with a heating network hydrophobic waste heat recovery structure. Background Art

[0002] The heating network heater is a device in the heating network system, which is used to transfer heat energy to the medium that needs to be heated. It is a key component in the heating network to realize the heat energy transmission and heating functions. The heating network heater is a key device in the heating network system and one of the main auxiliary equipment of the thermal power plant. Its main function is to use the steam extraction from the steam turbine or the steam (heating medium) drawn from the boiler to heat the circulating water in the hot water supply system to meet the requirements of heating users.

[0003] In the heating network system, some wastewater and steam are generated during the circulation and use of thermal water. These wastewater and steam are called drains. Traditionally, drains are directly discharged from the system, resulting in a waste of heat energy.

[0004] After searching, the patent with application number 202120277518.5 discloses a heat network energy supply heater, including a heater shell, a base is arranged at the lower position of the heater shell, and support feet are fixedly installed on the upper surface of the base near the two sides, an angle adjustment mechanism is connected between the support feet and the heater shell, a water inlet pipe is connected to the top of the heater shell, and a water outlet pipe is connected to the bottom of the heater shell, a filter is connected to the middle position of the water inlet pipe, and a heat exchange pipe is connected between the water inlet pipe and the water outlet pipe, the heat exchange pipe is arranged inside the heater shell, and the outer surface of the heat exchange pipe is evenly distributed with heat conductive blocks, one end of the heater shell is connected to the air inlet pipe, and the other end of the heater shell is connected to the air outlet pipe. The heat network energy supply heater described in this utility model belongs to the field of heat network heaters, which can conveniently fix the heater at different rotation angles, and can clamp the connecting pipe of the heater.

[0005] The heat network heater of the above scheme adopts the traditional drain treatment method, which directly discharges the drain with a certain amount of thermal energy generated by the steam after heat exchange, and does not recycle the thermal energy in the drain, resulting in the waste of thermal energy in the drain mentioned above. Therefore, we need to propose a heat network heater with a heat network drain waste heat recovery structure. Utility Model Content

[0006] The utility model aims to provide a heating network heater with a heat recovery structure for heat network drain. A preheating pipe is added to the cold water inlet pipe, and a heat exchange coil is installed in the preheating pipe. The drain generated in the heating network heater can be drained into the heat exchange coil. The cold water in the water inlet pipe exchanges heat with the drain through the heat exchange coil, that is, preheating of the cold water just entering the water inlet pipe is achieved, so as to achieve the purpose of recovering the heat energy of the drain and improve the heating efficiency of the heating network heater to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a heat network heater with a heat network drain waste heat recovery structure, comprising two groups of support frames and a heat network heater body installed on the two groups of support frames, the top of the heat network heater body is connected to a steam inlet, a heat exchange mechanism is installed inside the heat network heater body, one end of the heat network heater body is connected to a water chamber through a flange, the top of the water chamber is connected to a water outlet pipe, the bottom of the water chamber is connected to an L-shaped water inlet pipe, and the horizontal portion of the water inlet pipe is installed on the two groups of support frames;

[0008] A preheating mechanism is provided in the middle section of the transverse part of the water inlet pipe, and the preheating mechanism includes a preheating pipe connected to the water inlet pipe through a flange, a coil is installed inside the preheating pipe, and a drain outlet connected to the liquid inlet end of the coil is provided at the bottom of the heat network heater body.

[0009] Preferably, the heat exchange mechanism comprises a plurality of groups of U-shaped tube bundles, and ports of the U-shaped tube bundles are aligned and located inside the water chamber.

[0010] Preferably, a tube sheet for binding the U-shaped tube bundle is installed on the inner wall of the main body of the heating network heater, and a positioning hole is opened on the tube sheet, and the outer wall of the end of the U-shaped tube bundle is inserted and fixed inside the positioning hole.

[0011] Preferably, the inner wall of the main body of the heating network heater is further provided with a plurality of groups of staggered support baffles, and the U-shaped tube bundle passes through the support baffles.

[0012] Preferably, a fluid baffle for separating cold water and hot water is installed inside the water chamber, and the fluid baffle is configured as a bent fluid baffle. A cover plate is installed at one end of the water chamber via a flange.

[0013] Preferably, the lower end of the drain outlet is connected to a drain pipe, the liquid inlet end of the coil is connected to a drain inlet pipe, one end of the drain inlet pipe passes through the top of the preheating tube and is connected to the drain pipe; the liquid outlet end of the coil is connected to a drain pipe, one end of the drain pipe passes through the bottom of the preheating tube and is located at the lower end of the preheating tube.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model adds a preheating pipe in the cold water inlet pipe, and a heat exchange coil is installed in the preheating pipe, so that the drain generated in the heating network heater can be drained into the heat exchange coil. The cold water in the water inlet pipe exchanges heat with the drain through the heat exchange coil, that is, the preheating of the cold water just entering the water inlet pipe is realized, the purpose of recycling the heat energy of the drain is achieved, and the heating efficiency of the heating network heater is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the U-shaped tube bundle, support baffle and tube sheet of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the preheating mechanism of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the water chamber and the fluid baffle of the utility model.

[0020] In the figure: 1. main body of the heating network heater; 2. support frame; 3. steam inlet; 4. drain outlet; 5. water chamber; 6. outlet pipe; 7. cover plate; 8. inlet pipe; 9. preheating mechanism; 91. preheating pipe; 92. coil; 93. inlet drain pipe; 94. drain pipe; 10. drain pipe; 11. U-shaped tube bundle; 12. support baffle; 13. tube sheet; 14. fluid baffle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4The utility model provides a technical solution: a heat network heater with a heat network drain waste heat recovery structure, comprising two groups of support frames 2 and a heat network heater body 1 installed on the two groups of support frames 2, the top of the heat network heater body 1 is connected with a steam inlet 3, the steam inlet 3 is installed with a temperature measuring device for monitoring the steam temperature, a heat exchange mechanism is installed inside the heat network heater body 1, and heat exchange between steam and cold water is achieved through the heat exchange mechanism, one end of the heat network heater body 1 is connected with a water chamber 5 through a flange, the top of the water chamber 5 is connected with a water outlet pipe 6, the water outlet pipe 6 can also be installed with a temperature measuring device for monitoring the outlet water temperature, the bottom of the water chamber 5 is connected with an L-shaped water inlet pipe 8, and the horizontal portion of the water inlet pipe 8 is installed on the two groups of support frames 2;

[0023] A preheating mechanism 9 is provided in the middle section of the transverse part of the water inlet pipe 8, and the preheating mechanism 9 can realize preheating of the cold water just entering. The preheating mechanism 9 includes a preheating pipe 91 connected with the water inlet pipe 8 through a flange, and a coil 92 is installed inside the preheating pipe 91. A drain outlet 4 connected with the liquid inlet end of the coil 92 is provided at the bottom of the heat network heater body 1. The drain generated by the steam after heat exchange flows from the drain outlet 4 to the coil 92, thereby realizing preheating of the cold water just entering.

[0024] The heat exchange mechanism includes a plurality of U-shaped tube bundles 11, the ports of which are aligned and located inside the water chamber 5. The lower port of the U-shaped tube bundle 11 is a water inlet, and the upper port of the U-shaped tube bundle 11 is a water outlet.

[0025] The inner wall of the heating network heater body 1 is installed with a tube sheet 13 for binding the U-shaped tube bundle 11. The tube sheet 13 is provided with a positioning hole. The outer wall of the end of the U-shaped tube bundle 11 is inserted and fixed inside the positioning hole to position the U-shaped tube bundle 11.

[0026] The inner wall of the heating network heater body 1 is also equipped with a plurality of staggered support baffles 12 , and the U-shaped tube bundle 11 passes through the support baffles 12 , which reinforces the positioning of the U-shaped tube bundle 11 .

[0027] like Figure 4 As shown, a fluid baffle 14 for separating cold water and hot water is installed inside the water chamber 5. The fluid baffle 14 is configured as a bent fluid baffle, that is, the fluid baffle 14 includes two mirror-imaged and inclined inclined plates. The lower half of the fluid baffle 14 is used to block cold water, and the upper half of the fluid baffle 14 is used to block hot water, thereby preventing the mixing of cold and hot water and reducing or even eliminating the heat exchange between cold and hot water. A cover plate 7 is installed at one end of the water chamber 5 through a flange.

[0028] The lower end of the drain outlet 4 is connected to a drain pipe 10, the liquid inlet end of the coil 92 is connected to a drain inlet pipe 93, one end of the drain inlet pipe 93 passes through the top of the preheating tube 91 and is connected to the drain pipe 10; the liquid outlet end of the coil 92 is connected to a drain pipe 94, one end of the drain pipe 94 passes through the bottom of the preheating tube 91 and is located at the lower end of the preheating tube 91.

[0029] The drain water flows into the coil 92 through the drain inlet pipe 93, and the drain water exchanges heat with the newly entered cold water through the coil 92, thereby preheating the newly entered cold water.

[0030] When in use, cold water enters the water chamber 5 from the water inlet pipe 8. Under the blocking effect of the fluid baffle 14, the cold water enters from the port at the lower end of the U-shaped tube bundle 11. At the same time, steam is introduced from the steam inlet 3. Under the deflection effect of multiple staggered support baffles 12, the steam makes a continuous S-shaped flow between the multiple support baffles 12, thereby realizing heat exchange with the cold water in the U-shaped tube bundle 11. The water temperature rises, and the condensed water generated by the steam in the heat exchange process is drain, and is discharged from the drain outlet 4 to the drain pipe 10. Then the drain flows into the coil 92 through the drain inlet pipe 93. The drain exchanges heat with the cold water that has just entered through the coil 92, thereby preheating the cold water that has just entered.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heating network heater with a heating network drain waste heat recovery structure, comprising two sets of support frames (2) and a heating network heater body (1) mounted on the two sets of support frames (2), Features: The top of the heating network heater body (1) is connected to a steam inlet (3), a heat exchange mechanism is installed inside the heating network heater body (1), one end of the heating network heater body (1) is connected to a water chamber (5) via a flange, the top of the water chamber (5) is connected to a water outlet pipe (6), the bottom of the water chamber (5) is connected to an L-shaped water inlet pipe (8), and the transverse portion of the water inlet pipe (8) is installed on two sets of support frames (2); A preheating mechanism (9) is provided in the middle section of the transverse portion of the water inlet pipe (8), the preheating mechanism (9) comprising a preheating pipe (91) connected to the water inlet pipe (8) via a flange, a coil (92) is installed inside the preheating pipe (91), and a drain outlet (4) connected to the liquid inlet end of the coil (92) is provided at the bottom of the heating network heater body (1).

2. A heating network heater with a heating network drain waste heat recovery structure according to claim 1, Features: The heat exchange mechanism comprises a plurality of groups of U-shaped tube bundles (11), the ports of the U-shaped tube bundles (11) being aligned and located inside the water chamber (5).

3. A heating network heater with a heating network drain waste heat recovery structure according to claim 2, Features: The inner wall of the heating network heater body (1) is provided with a tube sheet (13) for binding the U-shaped tube bundle (11), and a positioning hole is provided on the tube sheet (13), and the outer wall of the end of the U-shaped tube bundle (11) is inserted and fixed inside the positioning hole.

4. A heating network heater with a heating network drain waste heat recovery structure according to claim 3, Features: The inner wall of the heating network heater body (1) is also equipped with a plurality of groups of staggered support baffles (12), and the U-shaped tube bundle (11) passes through the support baffles (12).

5. The heating network heater with a heating network drain waste heat recovery structure according to claim 1, Features: A fluid baffle (14) for separating cold water and hot water is installed inside the water chamber (5), and the fluid baffle (14) is configured as a bent fluid baffle. A cover plate (7) is installed at one end of the water chamber (5) via a flange.

6. The heating network heater with a heating network drain waste heat recovery structure according to claim 1, Features: The lower end of the drain outlet (4) is connected to a drain pipe (10); the liquid inlet end of the coil (92) is connected to a drain inlet pipe (93); one end of the drain inlet pipe (93) passes through the top of the preheating tube (91) and is connected to the drain pipe (10); the liquid outlet end of the coil (92) is connected to a drain pipe (94); one end of the drain pipe (94) passes through the bottom of the preheating tube (91) and is located at the lower end of the preheating tube (91).

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