Gas-fired heat-conducting oil heating furnace with uniform heating

Abstract

The application discloses a gas type heat conducting oil heating furnace with uniform heating, which belongs to the technical field of heating equipment and comprises a heating furnace body, an air inlet, an air outlet and a heat conducting oil pipe arranged on the heating furnace body. A limiting pipe is arranged in the heating furnace body, the limiting pipe is used for covering the air inlet and is located on the inner side of the heat conducting oil pipe, the limiting pipe extends along the length direction of the heating furnace body, a through hole is arranged on the outer wall of the limiting pipe, the diameter of one end of the limiting pipe facing the air inlet is smaller than the diameter of the other end of the limiting pipe far from the air inlet. The limiting pipe is arranged in the heating furnace body, high-temperature flue gas is forced to flow along a predetermined path, and the high-temperature flue gas is prevented from diffusing in disorder after entering the furnace chamber. The diameter of one end of the limiting pipe facing the air inlet is small, so that the flue gas maintains a high flow speed in the initial stage and rapidly penetrates to the rear part of the heating furnace. With the gradual increase of the diameter of the limiting pipe, the flow speed of the flue gas is naturally reduced, and the front and rear heat conducting oil pipes are uniformly contacted with the high-temperature flue gas.

Description

Technical Field

[0001] This invention relates to the field of heating equipment, and more specifically to a gas-fired thermal oil heater that provides uniform heating. Background Technology

[0002] When a gas-fired thermal oil heater is working, the high-temperature flue gas generated by combustion in the burner is introduced into the furnace body to exchange heat with the thermal oil in the heat exchange tubes inside the furnace. After entering the furnace, the high-temperature flue gas will naturally diffuse and then flow backward due to the lack of an effective flow guiding structure. This results in the flue gas temperature being higher when it comes into contact with the front thermal oil tubes near the flue gas inlet, while the flue gas temperature being lower when it comes into contact with the rear thermal oil tubes far from the flue gas inlet. This temperature difference will cause uneven heating of the thermal oil tubes. The front oil tubes may be overheated, which may accelerate the cracking and coking of the thermal oil, while the rear oil tubes may be underheated, affecting the overall thermal efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a gas-fired thermal oil heater that provides uniform heating, which solves the problem of the lack of an effective flow guiding structure in existing gas-fired thermal oil heaters.

[0004] The present invention achieves the above objectives through the following technical solution: a gas-fired thermal oil heater with uniform heating, comprising: a heater body and an air inlet, an exhaust outlet, and a thermal oil pipe provided on the heater body;

[0005] The heating furnace body is provided with a limiting tube, which is used to cover the air inlet and is located inside the heat transfer oil pipe. The limiting tube extends along the length of the heating furnace body and has a through hole on its outer wall. The diameter of the limiting tube facing the air inlet is smaller than the diameter of the limiting tube away from the air inlet.

[0006] Preferably, the limiting tube includes a first tube body, a second tube body, and a third tube body in sequence. The first tube body, the second tube body, and the third tube body are distributed in sequence along the flow direction of the high-temperature flue gas inside the heating furnace body. The diameter of the first tube body is smaller than the diameter of the third tube body, and the second tube body is trumpet-shaped.

[0007] Preferably, the first tube, the second tube, and the third tube are all provided with through holes, and the diameter of the through holes in the first tube, the second tube, and the third tube gradually increases.

[0008] Preferably, the heating furnace body is provided with a baffle for sealing the end of the third tube, and the heating furnace body is provided with a driving component for changing the distance between the baffle and the third tube.

[0009] Preferably, a detector is provided inside the third tube, and the driving member is used to drive the baffle away from the third tube when the detector detects that the pressure inside the third tube is greater than a threshold.

[0010] Preferably, the diameter of the baffle is larger than the diameter of the third tube.

[0011] Preferably, the moving end of the driving member is provided with a moving part for connecting with the baffle;

[0012] The movable component includes an isolation block and a connecting block.

[0013] Preferably, the outer wall of the limiting tube is provided with a heat-conducting element for connecting with the outer wall of the heat-conducting oil pipe, and the limiting tube is a heat-conducting metal element;

[0014] The heat-conducting component includes a first connecting rod and a second connecting rod, which are detachably connected by a fixing member.

[0015] Preferably, the end of the second connecting rod is provided with a slot, and the end of the first connecting rod is provided with a groove, wherein a plug for insertion into the slot is slidably provided in the groove.

[0016] The beneficial effects of this invention are as follows: by setting a limiting tube in the heating furnace body, the high-temperature flue gas is forced to flow along a predetermined path, avoiding disorderly diffusion after entering the furnace. The diameter of the limiting tube facing the air inlet is small, so that the flue gas maintains a high flow rate in the initial stage and quickly penetrates to the rear of the heating furnace, avoiding local accumulation at the front end and resulting in uniform flue gas distribution. As the diameter of the limiting tube gradually increases, the flue gas flow rate naturally decreases, thereby extending its residence time in the furnace and ensuring that the front and rear sections of the heat-conducting oil pipes are in uniform contact with the high-temperature flue gas. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the gas-fired thermal oil heater of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the heating furnace body of the present invention;

[0019] Figure 3 This is a schematic diagram of the limiting tube structure of the present invention;

[0020] Figure 4 For the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the connection structure between the first connecting rod and the insert block of the present invention.

[0022] In the diagram: 1. Heating furnace body; 2. Air inlet; 3. Exhaust outlet; 4. Heat transfer oil pipe; 5. Restriction pipe; 501. First pipe body; 502. Second pipe body; 503. Third pipe body; 6. Through hole; 7. Baffle; 8. Heat transfer component; 801. First connecting rod; 802. Fixing component; 803. Second connecting rod; 804. Slot; 805. Insert block; 9. Driving component; 10. Moving component; 101. Isolation block; 102. Connecting block. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] Example 1

[0025] Please see Figure 1 and Figure 2 A gas-fired thermal oil heater with uniform heating includes: a heater body 1, an air inlet 2 on the left side wall of the heater body 1, an exhaust port 3 on the top wall of the heater body 1, and a spiral thermal oil pipe 4 installed inside the heater body 1.

[0026] Please see Figure 2 A limiting tube 5 is installed in the inner cavity of the heating furnace body 1. The left end of the limiting tube 5 covers the air inlet 2, and the limiting tube 5 is located inside the heat transfer oil pipe 4. The limiting tube 5 extends along the length of the heating furnace body 1. A through hole 6 is opened on the outer wall of the limiting tube 5. The diameter of the end of the limiting tube 5 facing the air inlet 2 is smaller than the diameter of the end of the limiting tube 5 away from the air inlet 2.

[0027] It should be noted that the high-temperature flue gas generated by the external burner is introduced into the interior of the furnace body 1 through the air inlet 2 and is located inside the limiting pipe 5. Guided by the limiting pipe 5, it flows deeper into the furnace body 1. During the flow of the high-temperature flue gas inside the limiting pipe 5, some of it exits through the through hole 6 and exchanges heat with the heat transfer oil in the heat transfer oil pipe 4. The heat-exchanged high-temperature flue gas is discharged from the exhaust port 3. Due to the guidance of the limiting pipe 5, the high-temperature flue gas does not immediately diffuse after entering the interior of the furnace body 1, but flows deeper into the furnace body 1. During the flow, the high-temperature flue gas gradually exits through the limiting pipe. 5. The internal discharge contacts the heat-conducting oil pipe 4, which is used to evenly distribute the high-temperature flue gas to all areas of the heat-conducting oil pipe 4. At the same time, the diameter of the end of the limiting pipe 5 facing the air inlet 2 is smaller than the diameter of the end of the limiting pipe 5 away from the air inlet 2, so that the high-temperature flue gas has a high flow velocity in the initial stage of entering the limiting pipe 5, thereby quickly advancing to the rear of the heating furnace body 1, avoiding the accumulation of high-temperature flue gas at the front end of the limiting pipe 5 and causing uneven distribution of high-temperature flue gas. As the flue gas flows backward, the flow velocity gradually decreases, which is conducive to more even distribution of flue gas in the rear section of the heating furnace body 1 and prolongs its residence time inside the heating furnace body 1, improving the overall heat exchange effect and making the heat-conducting oil pipe 4 heat evenly.

[0028] It should also be noted that there are several through holes 6, which are arranged in a ring on the outer wall of the limiting tube 5, thereby reducing the probability of uneven distribution of high-temperature flue gas.

[0029] In this embodiment, as a further optimization, please refer to... Figure 2 and Figure 3 The limiting tube 5 includes, from left to right, a first tube body 501, a second tube body 502, and a third tube body 503. The diameter of the first tube body 501 is smaller than the diameter of the third tube body 503, and the second tube body 502 is funnel-shaped. This makes the flow velocity of the high-temperature flue gas inside the third tube body 503 lower than the flow velocity inside the first tube body 501.

[0030] In this embodiment, as a further optimization, please refer to... Figure 3 Each of the first tube 501, the second tube 502, and the third tube 503 is provided with a through hole 6. The diameter of the through hole 6 in the first tube 501 is smaller than that in the second tube 502, and the diameter of the through hole 6 in the second tube 502 is smaller than that in the third tube 503. Since the diameter of the through hole 6 in the first tube 501 is the smallest, it is used to limit the amount of high-temperature flue gas discharged from the inside of the first tube 501 (the volume inside the first tube 501 is small, so the pressure of the high-temperature flue gas is relatively large at this point. If the diameter of the through hole 6 is larger, more high-temperature flue gas will be discharged), so that the high-temperature flue gas is evenly distributed.

[0031] In this embodiment, as a further optimization, please refer to... Figure 2, Figure 3 and Figure 4 The heating furnace body 1 is provided with a baffle 7, which is used to block the end of the third tube 503 to prevent high-temperature flue gas from being discharged directly from the end of the third tube 503, thus reducing its residence time inside the heating furnace body 1; a driving component 9 (such as an electric cylinder) is provided on the outer wall of the heating furnace body 1 to change the distance between the baffle 7 and the third tube 503.

[0032] In this embodiment, as a further optimization, please refer to... Figure 2 , Figure 3 and Figure 4 The third tube 503 is equipped with a detector (a high-temperature resistant gas pressure sensor, which may be a fiber optic pressure sensor). When the detector detects that the internal pressure of the third tube 503 is greater than the threshold, the external control device controls the drive component 9 to work, driving the baffle 7 away from the third tube 503, so that the high-temperature flue gas can be discharged from the end of the third tube 503, thereby reducing the gas pressure inside the limiting tube 5.

[0033] In this embodiment, as a further optimization, please refer to... Figure 3 The diameter of the baffle 7 is larger than the diameter of the third tube 503. The baffle 7 blocks the flue gas discharged from the end of the third tube 503, preventing it from passing directly over the baffle 7 and being discharged from the exhaust port 3, thereby increasing its residence time inside the heating furnace body 1 and improving heat exchange efficiency.

[0034] In this embodiment, as a further optimization, please refer to... Figure 4 The moving end of the driving component 9 is provided with a moving component 10. The moving component 10 includes an insulating block 101 and a connecting block 102. The connecting block 102 is connected to the moving end of the driving component 9, and the insulating block 101 is connected to the baffle 7. The insulating block 101 is made of a material with poor thermal conductivity and high temperature resistance, which can be quartz glass (but is not limited to quartz glass). This prevents the high temperature inside the heating furnace body 1 from directly acting on the driving component 9 through the moving component 10, thus protecting the driving component 9 and avoiding heat loss.

[0035] Example 2

[0036] As a further optimization of Example 1, please refer to Figure 2 and Figure 3 The outer wall of the limiting tube 5 is provided with a heat-conducting element 8 (the heat-conducting element 8 is made of metal, such as copper), the heat-conducting element 8 is connected to the outer wall of the heat-conducting oil pipe 4, and the limiting tube 5 is a heat-conducting metal part (such as copper); the heat on the limiting tube 5 is guided to the heat-conducting oil pipe 4.

[0037] In this embodiment, as a further optimization, please refer to... Figure 3The heat-conducting component 8 includes a first connecting rod 801 and a second connecting rod 803. The first connecting rod 801 is fixed on the limiting tube 5, and the second connecting rod 803 is fixed on the heat-conducting oil tube 4. The first connecting rod 801 and the second connecting rod 803 are detachably connected by a fixing member 802. The fixing member 802 includes a metal plate and bolts. The metal plate is fixed to the first connecting rod 801 and the second connecting rod 803 respectively by bolts, thereby realizing the connection between the first connecting rod 801 and the second connecting rod 803.

[0038] In this embodiment, as a further optimization, please refer to... Figure 5 The end of the second connecting rod 803 is provided with a slot, and the end of the first connecting rod 801 is provided with a slot 804. A plug 805 is slidably provided in the slot 804. The plug 805 is inserted into the slot so that the first connecting rod 801 and the second connecting rod 803 are in full contact, ensuring the heat conduction effect of the heat-conducting component 8.

[0039] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A gas-fired heat conduction oil heating furnace which is heated uniformly, characterized by The utility model relates to a heating furnace body (1) and the air inlet (2), exhaust port (3), heat conducting oil pipe (4) of being located on heating furnace body (1) are provided with. The restriction pipe (5) is used for covering the air inlet (2) and is located on the inner side of the heat conducting oil pipe (4), and the restriction pipe (5) extends along the length direction of the heating furnace body (1). The outer wall of the restriction pipe (5) is provided with a through hole (6), and the diameter of the end of the restriction pipe (5) facing the air inlet (2) is smaller than the diameter of the end of the restriction pipe (5) away from the air inlet (2). The restriction pipe (5) comprises a first pipe body (501), a second pipe body (502) and a third pipe body (503) in sequence. The first pipe body (501), the second pipe body (502) and the third pipe body (503) are sequentially distributed along the flow direction of the high-temperature flue gas in the heating furnace body (1). The diameter of the first pipe body (501) is smaller than the diameter of the third pipe body (503), and the second pipe body (502) is in the shape of a horn. The first pipe body (501), the second pipe body (502) and the third pipe body (503) are all provided with through holes (6), and the diameters of the through holes (6) of the first pipe body (501), the second pipe body (502) and the third pipe body (503) gradually increase. The heating furnace body (1) is provided with a baffle (7) for plugging the end of the third pipe body (503), and the heating furnace body (1) is provided with a driving member (9) for changing the distance between the baffle (7) and the third pipe body (503). The third pipe body (503) is provided with a detector, and the driving member (9) is used for driving the baffle (7) away from the third pipe body (503) when the detector detects that the pressure inside the third pipe body (503) is greater than a threshold value. The diameter of the baffle (7) is greater than the diameter of the third pipe body (503).

2. The gas-fired conduction oil heating furnace which is uniformly heated according to claim 1, wherein The moving end of the driving member (9) is provided with a moving member (10) for connecting with the baffle (7).

3. The gas-fired oil heating furnace of uniform heating according to claim 1, wherein The moving member (10) comprises an isolation block (101) and a connecting block (102). The outer wall of the restriction pipe (5) is provided with a heat conducting member (8) for connecting with the outer wall of the heat conducting oil pipe (4), and the restriction pipe (5) is a heat conducting metal member.

4. The gas-fired oil heating furnace which is uniformly heated according to claim 1, wherein The second connecting rod (803) is provided with a slot at the end, and the first connecting rod (801) is provided with a slot (804) at the end. The slot (804) is slidably provided with an insertion block (805) for being inserted into the slot. ​ 5. The gas-fired conduction oil heating furnace according to claim 4, wherein ​

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