Preheating device for boiler feed water

Abstract

The utility model discloses a preheating device for boiler feed water. The device comprises a heating bin communicated with a smoke exhaust pipeline, an air conveying cavity is formed in the heating bin, and a plurality of containing grooves are further formed in the heating bin; the water conveying part comprises a water conveying pipe connected with the heating bin, and further comprises a heat exchange cylinder which is arranged in the heating bin and communicates with the water conveying pipe; the heat exchange component comprises a plurality of heat exchange plates which are vertically distributed on the side wall of the heat exchange cylinder; the transmission part is arranged in the heating bin, and the transmission part is connected with the heat exchange cylinder; according to the utility model, the transmission part drives the heat exchange cylinder to rotate, the heat exchange plates rotate in the direction close to the center of the air conveying cavity, and the contact area between the heat exchange plates and flue gas is controlled, so that the heat exchange efficiency between the flue gas and supplementary water can be adjusted, and the applicability is improved.

Description

Technical Field

[0001] This utility model relates to the field of boiler feedwater preheating technology, and in particular to a boiler feedwater preheating device. Background Technology

[0002] A coal-fired boiler is a heat energy conversion device that uses coal as fuel to produce steam or hot water. It is commonly used in industrial production and thermal power generation. When feeding water into the boiler, the water is usually preheated to ensure the boiler's efficiency in producing steam.

[0003] In existing preheating devices, the waste heat in the flue gas emitted by the boiler is usually used to preheat the boiler water. However, since the flue gas emission rate varies depending on the actual working efficiency of the boiler, and existing preheating devices are difficult to adjust the heating efficiency between the flue gas and the boiler water, their applicability is limited.

[0004] Therefore, a boiler feedwater preheating device capable of adjusting the heating efficiency of boiler water is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings by providing a preheating device for boiler feedwater, which enables the adjustment of the heating efficiency of boiler water.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a preheating device for boiler feedwater, comprising: a heating chamber connected to a flue gas duct, wherein the heating chamber is provided with an air conveying chamber for guiding the flow of flue gas, and the heating chamber is also provided with a plurality of storage slots;

[0007] The water supply component includes a heat exchange cylinder that is vertically rotatably disposed in the heating chamber, one side of which extends into the air supply cavity, and the heat exchange cylinder is used to store replenishment water;

[0008] The heat exchange component includes multiple heat exchange plates vertically distributed on the side wall of the heat exchange cylinder, and each heat exchange plate corresponds to each of the receiving slots and is inserted inside them. Each heat exchange plate is used to exchange heat between the makeup water and the flue gas.

[0009] A transmission component is disposed in the heating chamber and is connected to the heat exchange cylinder to drive the heat exchange cylinder to rotate.

[0010] Furthermore, the heating chamber is provided with two heat exchange cylinders arranged opposite each other, and the transmission component is connected to each heat exchange cylinder to drive the two heat exchange cylinders to rotate relative to each other;

[0011] The heat exchange plates on the two heat exchange cylinders are arranged alternately in sequence.

[0012] Furthermore, each of the heat exchange cylinders is also vertically provided with a spiral baffle, and each baffle is connected to the heat exchange plate on the corresponding heat exchange cylinder. The baffle is used to improve the heat exchange efficiency of the makeup water in the corresponding heat exchange cylinder.

[0013] Furthermore, the heating chamber is also provided with a partition cavity that is not connected to the air supply cavity, and the bottom of each heat exchange cylinder is rotatably inserted into the partition cavity;

[0014] The transmission component includes a gear ring disposed on the bottom of each of the heat exchange cylinders, and the two gear rings mesh with each other. The partition cavity is also provided with a power unit, and the moving end of the power unit is provided with a gear that meshes with one of the gear rings. The power unit is used to drive the two gear rings to rotate relative to each other.

[0015] Furthermore, each of the storage slots has scrapers on both sides of the slot opening for removing impurities from the surface of the heat exchange plate.

[0016] The beneficial effects of this utility model are reflected in:

[0017] This invention uses a transmission component to drive the heat exchange cylinder to rotate, causing each heat exchange plate to rotate towards the center of the air delivery chamber, and controls the contact area between each heat exchange plate and the flue gas, thereby adjusting the heat exchange efficiency between the flue gas and the makeup water and improving applicability. Attached Figure Description

[0018] Figure 1 This is a perspective view of the boiler feedwater preheating device described in this utility model;

[0019] Figure 2 This is a first cross-sectional view of the boiler feedwater preheating device of this utility model;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 This is a second sectional view of the boiler feedwater preheating device of this utility model;

[0022] Figure 5 This is a structural view of the heat exchange plate.

[0023] In the picture:

[0024] 01. Exhaust duct; 1. Heating chamber; 11. Air supply chamber; 12. Storage trough; 13. Separation chamber; 2. Water supply components; 21. Water supply pipe; 22. Heat exchange cylinder; 3. Heat exchange components; 31. Heat exchange plate; 4. Transmission components; 41. Gear ring; 42. Power unit; 43. Gear; 5. Baffle plate; 6. Scraper. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0026] Please see Figure 1-5 This utility model discloses a preheating device for boiler feedwater, including a heating chamber 1 connected to the flue gas pipe 01. The heating chamber 1 has an air conveying cavity 11 for guiding the flow of flue gas, and the heating chamber 1 also has a plurality of storage slots 12.

[0027] The water supply component 2 includes a water supply pipe 21 connected to the heating chamber 1. The water supply pipe 21 is connected to an external water supply component (not shown in the figure). It also includes a heat exchange cylinder 22 that is vertically rotatably installed in the heating chamber 1 and connected to the water supply pipe 21. The heat exchange cylinder 22 is rotatably connected to the water supply pipe 21. One side of the heat exchange cylinder 22 extends into the air supply chamber 11. The connection between the heat exchange cylinder 22 and the air supply chamber 11 is a dynamic seal connection. The water supply component supplies supplementary water to the heat exchange cylinder 22 through the water supply pipe 21.

[0028] The heat exchange component 3 includes multiple heat exchange plates 31 vertically distributed on the side wall of the heat exchange cylinder 22, and each heat exchange plate 31 corresponds to each receiving groove 12 and is inserted inside it. Each heat exchange plate 31 is used to exchange heat between the makeup water and the flue gas.

[0029] The transmission component 4 is installed in the heating chamber 1 and is connected to the heat exchange cylinder 22 to drive the heat exchange cylinder 22 to rotate.

[0030] In specific implementation, when the flue gas enters the air supply cavity 11 of the heating chamber 1 through the exhaust pipe, the flue gas exchanges heat with the make-up water at the junction with the outer wall of the heat exchange cylinder 22. When it is necessary to adjust the heat exchange efficiency between the flue gas and the make-up water, the transmission component 4 drives the heat exchange cylinder 22 to rotate, so that each heat exchange plate 31 on the heat exchange cylinder 22 extends out from the corresponding receiving groove 12 and rotates towards the center of the air supply cavity 11. At this time, the flue gas can also exchange heat with the make-up water in the corresponding heat exchange cylinder 22 through each heat exchange plate 31, thereby adjusting the heat exchange area between each heat exchange cylinder 22 and the flue gas through each heat exchange plate 31, and thus adjusting the heat exchange efficiency between the flue gas and the make-up water.

[0031] This utility model uses a transmission component 4 to drive the heat exchange cylinder 22 to rotate, and causes each heat exchange plate 31 to rotate towards the center of the air delivery chamber 11. It also controls the contact area between each heat exchange plate 31 and the flue gas, thereby enabling the adjustment of the heat exchange efficiency between the flue gas and the makeup water and improving its applicability.

[0032] It should be noted that a rotary joint may be provided between the heat exchange cylinder 22 and the water supply pipe 21, so that when the heat exchange cylinder 22 rotates, the water supply pipe 21 can still supply supplementary water into the heat exchange cylinder 22.

[0033] In one embodiment, the heating chamber 1 is provided with two heat exchange cylinders 22 arranged opposite to each other. Each heat exchange cylinder 22 is vertically rotatably arranged inside the heating chamber. The transmission component 4 is connected to each heat exchange cylinder 22 and is used to drive the two heat exchange cylinders 22 to rotate relative to each other.

[0034] The heat exchange plates 31 on the two heat exchange cylinders 22 are arranged alternately.

[0035] With this design, when it is necessary to adjust the heat exchange efficiency of the replenishing water, the transmission component 4 drives the two heat exchange cylinders 22 to rotate relative to each other, thereby causing each heat exchange cylinder 22 to drive each heat exchange plate 31 to rotate into the air supply cavity 11. At this time, the heat exchange plates 31 on the two heat exchange cylinders 22 are arranged alternately and form a labyrinth air duct, which improves the heat exchange efficiency.

[0036] In one embodiment, each heat exchange cylinder 22 is also provided with a vertically arranged spiral baffle 5. Each baffle 5 is connected to the heat exchange plate 31 on the corresponding heat exchange cylinder 22. The baffle 5 is made of a thermally conductive material. The baffle 5 is used to reduce the flow rate of the makeup water in the corresponding heat exchange cylinder 22 and to exchange heat with the makeup water.

[0037] With this design, when the replenishing water enters the heat exchange cylinder 22, the flow baffle 5 is used to reduce the flow velocity of the replenishing water in the corresponding heat exchange cylinder 22 and exchange heat with the replenishing water, thereby extending the heat exchange time of the replenishing water in the heat exchange cylinder 22 and further improving the heat exchange effect.

[0038] In one embodiment, the heating chamber 1 is further provided with a partition cavity 13 that is not connected to the air supply cavity 11. The bottom of each heat exchange cylinder 22 is rotatably inserted into the partition cavity 13, and the connection between each heat exchange cylinder 22 and the partition cavity 13 is a dynamic sealing connection.

[0039] The transmission component 4 includes a gear ring 41 disposed on the bottom of each heat exchange cylinder 22, and the two gear rings 41 mesh with each other. The partition cavity 13 is also provided with a power unit 42, and the moving end of the power unit 42 is provided with a gear 43 that meshes with one of the gear rings 41. The power unit 42 is used to drive the two gear rings 41 to rotate relative to each other.

[0040] With this design, when it is necessary to adjust the heat exchange efficiency between the supplementary water and the flue gas, the power unit 42 drives the gear 43 to rotate the corresponding gear ring 41, thereby driving the two heat exchange cylinders 22 to rotate relative to each other through the gear rings 41. This causes each heat exchange cylinder 22 to drive the corresponding heat exchange plate 31 to rotate towards the center of the air supply cavity 11 until the area of ​​each heat exchange plate 31 extending into the air supply cavity 11 reaches a predetermined value. At this time, the power unit 42 stops the rotation of each heat exchange cylinder 22 through the gear rings 41. When the heat exchange plate 31 is not needed, the power unit 42 drives the heat exchange cylinders 22 to rotate relative to each other through the gear rings 41 until each heat exchange plate 31 is inserted back into the corresponding storage slot 12.

[0041] Preferably, the power unit 42 can be an electric motor from the prior art.

[0042] In one embodiment, scrapers 6 are provided on both sides of the opening of each storage slot 12. When the heat exchange plate 31 is inserted into the corresponding storage slot 12, the scrapers 6 contact the surface of the heat exchange plate 31 and scrape off the impurities attached to the surface of the heat exchange plate 31.

[0043] With this design, when each heat exchange cylinder 22 drives the corresponding heat exchange plate 31 to rotate to the corresponding storage tank 12, each heat exchange plate 31 rotates relative to the scraper 6 until each scraper 6 contacts the surface of the corresponding heat exchange plate 31. As the heat exchange plate 31 continues to rotate, each scraper 6 scrapes off the impurities attached to the surface of the corresponding heat exchange plate 31. The scraped-off impurities are discharged from the heating chamber 1 with the flue gas.

[0044] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0045] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0046] Additionally, "multiple" refers to two or more.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A preheating device for boiler feed water, characterized in that The utility model relates to a heat exchange device for flue gas, which comprises: a heating bin (1) in communication with a flue (01), the heating bin (1) is provided with a wind channel (11) for guiding the flow of flue gas, and the heating bin (1) is also provided with a plurality of receiving grooves (12); a water conveying component (2) comprising a heat exchange cylinder (22) vertically arranged in the heating bin (1), one side of the heat exchange cylinder (22) extending into the wind channel (11), and the heat exchange cylinder (22) being used for storing make-up water; a heat exchange component (3) comprising a plurality of heat exchange plates (31) vertically arranged on the side wall of the heat exchange cylinder (22), each heat exchange plate (31) corresponding to one of the receiving grooves (12) and being inserted into the receiving groove (12), and each heat exchange plate (31) being used for heat exchange between make-up water and flue gas; a transmission component (4) arranged in the heating bin (1) and connected with the heat exchange cylinder (22) for driving the heat exchange cylinder (22) to rotate.

2. A device for preheating boiler feed water according to claim 1, characterized in that: The heating bin (1) is provided with two heat exchange cylinders (22) arranged oppositely, the transmission component (4) is connected with each heat exchange cylinder (22) for driving the two heat exchange cylinders (22) to rotate oppositely; each heat exchange plate (31) on the two heat exchange cylinders (22) is arranged alternately.

3. A device for preheating boiler feed water according to claim 1, characterized in that: Each heat exchange cylinder (22) is also vertically provided with a spiral flow resistance sheet (5), each flow resistance sheet (5) is connected with the heat exchange plate (31) on the corresponding heat exchange cylinder (22), and the flow resistance sheet (5) is used for improving the heat exchange efficiency of make-up water in the corresponding heat exchange cylinder (22).

4. A device for preheating boiler feed water according to claim 1, characterized in that: The heating bin (1) is also provided with a partition chamber (13), and the bottom of each heat exchange cylinder (22) is rotatably inserted into the partition chamber (13); the transmission component (4) comprises a gear ring (41) arranged on the bottom of each heat exchange cylinder (22), the two gear rings (41) are engaged with each other, the partition chamber (13) is also provided with a power unit (42), a gear (43) engaged with one of the gear rings (41) is arranged on the moving end of the power unit (42), and the power unit (42) is used for driving the two gear rings (41) to rotate oppositely.

5. A device for preheating boiler feed water as claimed in claim 1 wherein: Each receiving groove (12) is provided with a scraper (6) on both sides of the groove opening for removing impurities on the surface of the heat exchange plate (31).

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