Boiler waste heat recovery device

Abstract

The utility model discloses a boiler waste heat recovery device which comprises a tank body, a top cover is installed at an opening in the top of the tank body, a partition plate is fixedly connected in the tank body and divides the interior of the tank body into a heat exchange bin and a water storage bin, an opening communicated with the water storage bin is formed in the bottom of the tank body, and the heat exchange bin is communicated with the water storage bin. A mounting plate is fixedly connected to the position, corresponding to the opening, of the bottom of the tank body, and a drainage pipe is arranged on the mounting plate in a penetrating manner; when the heat exchanger is used, after entering the heat exchange coil pipe through the air inlet pipe, smoke exchanges heat with cooling water to be cooled, then enters the water storage bin and is discharged through the air outlet pipe, and in the process, condensate water in the heat exchange coil pipe can be rapidly discharged into the water storage bin along with air flow and is collected in the water storage bin; and when the liquid level of the condensate water in the water storage bin reaches a certain height, the automatic drainage mechanism is started to discharge part of the condensate water, so that the condensate water in the flue gas is recycled, the flue gas condensate water is conveniently reutilized, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a boiler waste heat recovery device. Background Art

[0002] There is still a lot of heat in the boiler flue gas after purification. In order to avoid the waste of this heat, heat exchange equipment is usually used to exchange heat for the flue gas after purification. The commonly used heat exchange settings are mostly to use water cooling to exchange heat between the flue gas and cooling water, and then recover the heat of the cooling water.

[0003] After searching, the patent with announcement number CN219714121U discloses a boiler waste heat recovery device. When in use, the flue gas generated by the boiler enters the smoke inlet cavity. When the flue gas enters the smoke outlet cavity through the impeller, it drives the impeller to rotate, and the impeller drives the stirring shaft to rotate, so that the stirring element stirs the heat transfer medium in the heat storage box, making full use of the energy generated by the flue gas from the boiler.

[0004] Although the above scheme can make full use of the waste heat of boiler flue gas, the flue gas after purification is usually mixed with some water vapor generated in the purification process. During heat exchange, the water vapor will condense into water droplets on the outer wall of the heat storage box and gather in the insulation box. However, this scheme cannot collect and discharge the condensed water, which needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a boiler waste heat recovery device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A boiler waste heat recovery device comprises a tank body, a top cover is installed at the top opening of the tank body, a partition is fixedly connected to the tank body, and the partition divides the interior of the tank body into a heat exchange bin and a water storage bin, an opening connected to the water storage bin is opened at the bottom of the tank body, a mounting plate is fixedly connected to the bottom of the tank body corresponding to the opening, a drain pipe is passed through the mounting plate, an automatic drain mechanism is installed at one end of the drain pipe located in the water storage bin, a water inlet pipe, a water outlet pipe and an air inlet pipe are passed through the outer wall of the tank body corresponding to the heat exchange bin, a heat exchange coil is fixedly connected to one end of the air inlet pipe located in the heat exchange bin, the bottom end of the heat exchange coil passes through the partition and is located in the water storage bin, and an air outlet pipe connected to the water storage bin is passed through the outer wall of the tank body.

[0008] As a further solution of the utility model: the automatic drainage mechanism includes a conduit fixedly connected to the mounting plate through a bracket, a sliding rod slidingly penetrates the inner side of the conduit, a valve core is fixedly connected to the bottom end of the sliding rod, a sealing gasket is fixedly connected to the outer wall of the valve core and the corresponding position of the top end of the drainage pipe, and a float is fixedly connected to the top end of the sliding rod.

[0009] As a further solution of the utility model: the outer wall of the sliding rod is sleeved with a spring, and the spring is located between the conduit and the valve core.

[0010] As a further solution of the utility model: the bottom of the partition is fixedly connected to a baffle through a plurality of connecting rods, and the bottom end of the heat exchange coil faces the baffle.

[0011] As a further solution of the utility model: a defogger filter is detachably installed on one end of the air outlet pipe located in the water storage tank, an inspection port is provided on the outer wall of the tank body located on one side of the air outlet pipe, and a blind plate flange is connected to the end of the inspection port away from the tank body by bolts.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] When the utility model is in use, after the flue gas enters the heat exchange coil from the air inlet pipe, it will exchange heat and cool down with the cooling water, and then enter the water storage tank and be discharged from the air outlet pipe. During this process, the condensed water in the heat exchange coil will be quickly discharged into the water storage tank with the air flow and gathered in the water storage tank. When the condensed water level in the water storage tank reaches a certain height, the automatic drainage mechanism is opened to discharge part of the condensed water, thereby realizing the recovery of the condensed water in the flue gas, facilitating the secondary utilization of the flue gas condensed water, and having a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a structural schematic diagram of a boiler waste heat recovery device.

[0015] Figure 2 for Figure 1 sectional view of .

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0017] Among them, the tank body 1, the top cover 2, the partition 3, the heat exchange chamber 4, the water storage chamber 5, the water inlet pipe 6, the water outlet pipe 7, the air inlet pipe 8, the heat exchange coil 9, the air outlet pipe 10, the defog filter element 11, the blind flange 12, the connecting rod 13, the baffle 14, the opening 15, the mounting plate 16, the drain pipe 17, the bracket 18, the conduit 19, the sliding rod 20, the valve core 21, the float 22, and the spring 23. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figures 1 to 3 In an embodiment of the utility model, a boiler waste heat recovery device comprises a tank body 1, a top cover 2 is installed at the top opening of the tank body 1, a partition 3 is fixedly connected inside the tank body 1, and the partition 3 divides the interior of the tank body 1 into a heat exchange bin 4 and a water storage bin 5, an opening 15 connected to the water storage bin 5 is opened at the bottom of the tank body 1, a mounting plate 16 is fixedly connected at the bottom of the tank body 1 corresponding to the opening 15, a drain pipe 17 is penetrated on the mounting plate 16, and an automatic drain mechanism is installed at one end of the drain pipe 17 located in the water storage bin 5, a water inlet pipe 6, a water outlet pipe 7 and an air inlet pipe 8 are penetrated and installed at the outer wall of the tank body 1 corresponding to the heat exchange bin 4, a heat exchange coil 9 is fixedly connected at one end of the air inlet pipe 8 located in the heat exchange bin 4, and the bottom end of the heat exchange coil 9 passes through the partition 3 and is located in the water storage bin 5, and an air outlet pipe 10 connected to the water storage bin 5 is penetrated and installed on the outer wall of the tank body 1.

[0020] The utility model adopts the above scheme. When in use, cooling water enters the heat exchange bin 4 through the water inlet pipe 6 and is then discharged through the water outlet pipe 7, so that a certain amount of cooling water can be retained in the heat exchange bin 4 to cool the heat exchange coil 9. After the flue gas enters the heat exchange coil 9 through the air inlet pipe 8, it will exchange heat with the cooling water for cooling, and then enter the water storage bin 5 and be discharged through the air outlet pipe 10. During this process, the condensed water in the heat exchange coil 9 will be quickly discharged into the water storage bin 5 with the air flow and gathered in the water storage bin 5. When the condensed water level in the water storage bin 5 reaches a certain height, the automatic drainage mechanism is opened to discharge part of the condensed water, thereby realizing the recovery of condensed water in the flue gas, facilitating the secondary utilization of the flue gas condensed water, and having a good use effect.

[0021] Specific combination Figure 3 In one embodiment of the utility model, the automatic drainage mechanism includes a conduit 19 fixedly connected to the mounting plate 16 through a bracket 18, a sliding rod 20 is slidably penetrated through the inner side of the conduit 19, a valve core 21 is fixedly connected to the bottom end of the sliding rod 20, a sealing gasket is fixedly connected to the outer wall of the valve core 21 at a corresponding position to the top of the drain pipe 17, and a float 22 is fixedly connected to the top of the sliding rod 20.

[0022] When the condensed water level in the water storage tank 5 contacts the float 22 and continues to rise, the float 22 will be driven to move upward, thereby driving the valve core 21 to move upward through the slide rod 20 to open the top of the drain pipe 17, thereby discharging excess condensed water and lowering the condensed water level. At this time, the float 22 and the valve core 21 will drop accordingly, so that the sealing gaskets on the two valve cores 21 will block the top of the drain pipe 17 again, so that a certain amount of condensed water is always retained in the water storage tank 5 to prevent smoke from being discharged from the drain pipe 17.

[0023] Specific combination Figure 3 On the basis of the previous embodiment, further, the outer wall of the slide rod 20 is provided with a spring 23, and the spring 23 is located between the conduit 19 and the valve core 21. Through the setting of the spring 23, a downward thrust can be always applied to the valve core 21, so that the valve core 21 responds quickly when the liquid level drops.

[0024] Specific combination Figure 2 In one embodiment of the present utility model, the bottom of the partition 3 is fixedly connected to a baffle 14 through a plurality of connecting rods 13 , and the bottom end of the heat exchange coil 9 faces the baffle 14 .

[0025] By setting the baffle 14, the smoke discharged from the heat exchange coil 9 can be blocked, thereby preventing the smoke from blowing directly onto the liquid surface of the condensed water or the float 22, thereby ensuring the stable operation of the automatic drainage mechanism.

[0026] Specific combination Figure 2 In one embodiment of the utility model, a defogger filter 11 is detachably installed at one end of the air outlet pipe 10 located in the water storage tank 5, an inspection port is provided on the outer wall of the tank body 1 on one side of the air outlet pipe 10, and a blind flange 12 is connected to the end of the inspection port away from the tank body 1 by bolts.

[0027] By setting the defog filter 11, the smoke discharged from the exhaust pipe 10 can be filtered to reduce the moisture carried by the discharged smoke. By setting the inspection port and the blind flange 12, it is only necessary to remove the blind flange 12 and put your hand into the water storage tank 5 through the inspection port to facilitate the replacement of the defog filter 1.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A boiler waste heat recovery device, characterized in that: The invention comprises a tank body (1), a top cover (2) is installed at the top opening of the tank body (1), a partition (3) is fixedly connected inside the tank body (1), and the partition (3) divides the inside of the tank body (1) into a heat exchange chamber (4) and a water storage chamber (5), an opening (15) connected to the water storage chamber (5) is opened at the bottom of the tank body (1), a mounting plate (16) is fixedly connected at a position corresponding to the bottom of the tank body (1) and the opening (15), a drainage pipe (17) is passed through the mounting plate (16), and the drainage pipe (17) is connected to the bottom of the tank body (1). An automatic drainage mechanism is installed at one end of the pipe (17) located in the water storage bin (5); a water inlet pipe (6), a water outlet pipe (7) and an air inlet pipe (8) are installed through the outer wall of the tank body (1) at the corresponding position of the heat exchange bin (4); one end of the air inlet pipe (8) located in the heat exchange bin (4) is fixedly connected to a heat exchange coil (9); the bottom end of the heat exchange coil (9) passes through the partition (3) and is located in the water storage bin (5); and an air outlet pipe (10) connected to the water storage bin (5) is installed through the outer wall of the tank body (1).

2. A boiler waste heat recovery device according to claim 1, characterized in that: The automatic drainage mechanism comprises a conduit (19) fixedly connected to the mounting plate (16) via a bracket (18); a slide rod (20) is slidably penetrated through the inner side of the conduit (19); a valve core (21) is fixedly connected to the bottom end of the slide rod (20); a sealing gasket is fixedly connected to the outer wall of the valve core (21) at a corresponding position to the top end of the drainage pipe (17); and a float (22) is fixedly connected to the top end of the slide rod (20).

3. A boiler waste heat recovery device according to claim 2, characterized in that: The outer wall of the sliding rod (20) is sleeved with a spring (23), and the spring (23) is located between the conduit (19) and the valve core (21).

4. A boiler waste heat recovery device according to claim 1, characterized in that: The bottom of the partition (3) is fixedly connected to a baffle (14) via a plurality of connecting rods (13), and the bottom end of the heat exchange coil (9) faces the baffle (14).

5. The boiler waste heat recovery device according to claim 1, characterized in that: The end of the air outlet pipe (10) located in the water storage tank (5) is detachably mounted with a demisting filter element (11); the outer wall of the tank body (1) located on one side of the air outlet pipe (10) is provided with an inspection port, and the end of the inspection port away from the tank body (1) is connected to a blind flange (12) via bolts.

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