A coke oven riser heat exchanger with variable heat area

Abstract

The present invention discloses a coke oven riser heat exchanger with a variable heat area, comprising a riser heat exchanger body, the cylinder of which is vertically arranged, and also comprising a heat exchange plate, a driving mechanism, an upper temperature sensor, a middle temperature sensor, a lower temperature sensor and a controller. The heat exchange plate is vertically arranged, the upper end of the cylinder is provided with a through hole matching the heat exchange plate, the lower end of the heat exchange plate passes through the through hole and is slidably fitted with the hole wall of the through hole, a platform extending outward is horizontally arranged at the upper end opening of the cylinder, the driving mechanism is arranged on the platform and is transmission-connected with the heat exchange plate, the driving mechanism drives the lower end of the heat exchange plate to move up and down in the cylinder, and the driving mechanism, the upper temperature sensor, the middle temperature sensor and the lower temperature sensor are electrically connected to the controller respectively. The present invention provides a coke oven riser heat exchanger with a variable heat area, which reduces the temperature of raw coal gas and controls the temperature of raw coal gas to be reduced to above 450°C.

Description

Technical Field

[0001] The present invention relates to the field of riser heat exchangers, and more specifically, to a coke oven riser heat exchanger with a variable heat area. Background Art

[0002] The efficient recovery and utilization of the waste heat resources of coke oven gas generated in the coking process is the main direction of energy conservation in establishing a resource-saving, environmentally friendly green coking plant, and is also one of the main ways to reduce the energy consumption of coke ovens.

[0003] However, my country's exploration of secondary energy quality potential, development of value, and development of supporting technologies and equipment for low-quality waste heat and waste energy are lagging behind. The waste heat utilization of the riser heat exchanger is now a mature and reliable recycling device. However, due to the particularity of the operation of the coke oven, from the beginning of coal addition to the coke pushing, the temperature and flow of the raw gas are changing at any time during the whole process. When the riser heat exchanger reduces the exchange gas temperature to below 450℃, the raw gas precipitates a large amount of tar on the inner wall of the riser, causing environmental pollution. How to effectively utilize the rising raw gas has become an important issue.

[0004] The existing riser heat exchanger has too much heat exchange capacity, black smoke comes out of the riser, and the environmental protection standard is not met. Or the heat exchange capacity of the coil riser is too small and has no economic value. The current technical difficulty is that the temperature of the coke oven raw gas slowly decreases with the increase of coke loading time, with the highest temperature being 850℃ and the lowest temperature being 650℃. The flow rate of the coke oven raw gas first increases with the increase of coke loading time, reaches the maximum when the time reaches 1 / 3 of the coke loading time, and then slowly decreases until no raw gas is produced. How to reduce the raw gas temperature as much as possible while controlling the raw gas temperature to above 450℃. Summary of the invention

[0005] The object of the present invention is to provide a coke oven riser heat exchanger with a variable heat area, which can reduce the temperature of raw gas and control the temperature of raw gas to be above 450°C.

[0006] In order to achieve these purposes and other advantages according to the present invention, a coke oven riser heat exchanger with a variable heat area is provided, including a riser heat exchanger body, the cylinder of which is vertically arranged, and also including a heat exchange plate, a driving mechanism, an upper temperature sensor, a middle temperature sensor, a lower temperature sensor and a controller. The heat exchange plate is vertically arranged, and a through hole matching the heat exchange plate is opened at the upper end of the cylinder, and the lower end of the heat exchange plate passes through the through hole and can slide up and down with the hole wall of the through hole. A platform extending outward is horizontally provided at the opening of the upper end of the cylinder, and the driving mechanism is arranged on the platform and is transmission-connected to the heat exchange plate. The driving mechanism drives the lower end of the heat exchange plate to move up and down in the cylinder, and the upper temperature sensor, the middle temperature sensor and the lower temperature sensor are arranged in the cylinder from top to bottom in sequence, and the driving mechanism, the upper temperature sensor, the middle temperature sensor and the lower temperature sensor are electrically connected to the controller respectively.

[0007] Preferably, in the coke oven riser heat exchanger with a variable heat area, two strip grooves corresponding to the heat exchange plates are vertically provided on the inner wall of the cylinder, and the two ends of the heat exchange plates can be slid up and down in the corresponding strip grooves.

[0008] Preferably, in the coke oven riser heat exchanger with a variable heat area, the heat exchange plates are arranged in the horizontal direction along the radial direction of the cylinder.

[0009] Preferably, in the coke oven riser heat exchanger with a variable heat area, the driving mechanism includes a motor, a driving gear, a driven gear and a rack; the motor is arranged on the platform and electrically connected to the controller; the driving gear is sleeved on the output shaft of the motor; the rack is vertically arranged at one end of the heat exchange plate close to the platform and is transmission-connected to the conveying driving gear through the driven gear; the rack is slidably fitted with the bottom wall of the corresponding groove; and the end of the heat exchange plate away from the platform is slidably fitted with the bottom wall of the corresponding groove.

[0010] Preferably, the coke oven riser heat exchanger with a variable heat area further includes a limiting mechanism, which is arranged at the upper end of the cylinder and is transmission-connected to the end of the heat exchange plate away from the platform, so that when the driving mechanism drives the heat exchange plate to slide up and down, the heat exchange plate remains vertical.

[0011] Preferably, in the coke oven riser heat exchanger with a variable heat area, the limiting mechanism includes at least one round rod and circular rings that are equal in number to and corresponding to the round rods, the round rods are vertically arranged at the upper end of the cylinder, the circular rings are slidably mounted on the corresponding round rods, and are connected to the upper end of the heat exchange plate through a connecting piece.

[0012] Preferably, in the coke oven riser heat exchanger with a variable heat area, two round rods are provided, and the two round rods are spaced apart and arranged at the upper end of the cylinder.

[0013] Preferably, in the coke oven riser heat exchanger with a variable heat area, the heat exchange plate is coated with an anti-corrosion and heat-insulating layer.

[0014] The present invention installs a heat exchange plate inside the riser heat exchanger, which can effectively reduce the heat exchange between the raw gas and the heat exchange surface of the riser heat exchanger; and installs three temperature sensors on the upper part of the riser to monitor the temperature of the raw gas. The temperature feedback from the temperature sensor is used to control the up and down movement of the heat exchange plate to adjust the size of the heat exchange plate on the outer part of the cylinder of the riser heat exchanger, thereby adjusting the heat exchange area of ​​the riser heat exchanger. Tar precipitation on the inner wall of the riser heat exchanger is reduced by adjusting the heat exchange surface of the heat exchange plate located outside the riser heat exchanger.

[0015] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the coke oven riser heat exchanger according to the present invention;

[0017] Figure 2 It is a schematic structural diagram of the limiting mechanism described in the present invention. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0019] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] like Figure 1 As shown, an embodiment of the present invention provides a coke oven riser heat exchanger with a variable heat area, comprising a riser heat exchanger body, a cylinder 1 of which is vertically arranged, and further comprising a heat exchange plate 2, a driving mechanism, an upper temperature sensor 3, a middle temperature sensor 4, a lower temperature sensor 5 and a controller, wherein the heat exchange plate 2 is vertically arranged, a through hole matching the heat exchange plate 2 is opened at the upper end of the cylinder 1, the lower end of the heat exchange plate 2 passes through the through hole and is slidably fitted with the hole wall of the through hole up and down, a platform 6 extending outward is horizontally provided at the upper end opening of the cylinder 1, the driving mechanism is arranged on the platform 6 and is transmission-connected with the heat exchange plate 2, the driving mechanism drives the lower end of the heat exchange plate 2 to move up and down in the cylinder 1, the upper temperature sensor 3, the middle temperature sensor 4 and the lower temperature sensor 5 are arranged in the cylinder 1 from top to bottom in sequence, and the driving mechanism, the upper temperature sensor 3, the middle temperature sensor 4 and the lower temperature sensor 5 are electrically connected to the controller respectively.

[0021] In this embodiment, an upper temperature sensor 3, a middle temperature sensor 4 and a lower temperature sensor 5 are sequentially arranged from top to bottom in the cylinder 1 of the riser heat exchanger body to obtain the raw gas temperatures of the upper, middle and lower parts of the cylinder 1 respectively, and send them to the controller; the raw gas volume generated in the coking chamber of the coke oven is different in different coking periods: when the raw gas temperature of the lower part of the cylinder 1 measured by the lower temperature sensor 5 is lower than 500°C, the controller drives the heat exchange plate 2 to move downward to the lowest point through the driving mechanism to reduce the heat exchange of the riser heat exchanger; the raw gas measured by the lower temperature sensor 5 is When the gas temperature is higher than 500°C, the heat exchange plate 2 moves upward. If the middle temperature sensor 4 measures that the raw gas temperature is higher than 500°C, the heat exchange plate 2 continues to move upward to the highest point. If the upper temperature sensor 3 measures that the raw gas temperature is higher than 500°C, the heat exchange plate 2 stays at the highest point. If the middle temperature sensor 4 measures that the raw gas temperature is lower than 500°C, the heat exchange plate 2 moves downward until its upper half is located outside the cylinder 1 and its lower half is located inside the cylinder 1 and then stays. If the lower temperature sensor 5 measures that the raw gas temperature is lower than 500°C, the heat exchange plate 2 moves downward to the lowest point and stays.

[0022] Preferably, as another embodiment of the present invention, two strip grooves 7 corresponding to the heat exchange plate 2 are vertically provided on the inner wall of the cylinder 1, and the upper ends of the two grooves are connected to the through holes at the upper end of the cylinder 1, and the two ends of the heat exchange plate 2 are respectively slidably arranged in the corresponding strip grooves 7 up and down; the heat exchange plate 2 is arranged along the radial direction of the cylinder 1 in the horizontal direction.

[0023] In this embodiment, two strip-shaped grooves 7 corresponding to the heat exchange plates 2 are vertically provided on the inner wall of the cylinder 1, and the moving track of the heat exchange plates 2 can be restricted by the grooves so that the heat exchange plates 2 can only move up and down;

[0024] Preferably, as another embodiment of the present invention, the driving mechanism includes a motor 8, a driving gear, a driven gear 10 and a rack 11. The motor 8 is arranged on the platform 6 and is electrically connected to the controller. The driving gear 9 is arranged on the output shaft of the motor 8. The rack 11 is vertically arranged at one end of the heat exchange plate 2 close to the platform 6, and is connected to the conveying driving gear through the driven gear 10. The rack 11 is slidably fitted with the bottom wall of the corresponding groove, and the end of the heat exchange plate 2 away from the platform 6 is slidably fitted with the bottom wall of the corresponding groove.

[0025] In this embodiment, the motor 8 rotates to drive the driving gear to rotate, which in turn drives the transmission gear to rotate, which in turn drives the rack 11 to move, thereby driving the heat exchange plate 2 to move up and down.

[0026] Preferably, as another embodiment of the present invention, Figure 2 As shown, it also includes a limiting mechanism, which is arranged at the upper end of the cylinder 1 and is drivingly connected to the end of the heat exchange plate 2 away from the platform 6, so that when the driving mechanism drives the heat exchange plate 2 to slide up and down, the heat exchange plate 2 remains vertical; the limiting mechanism includes two round rods 12 and circular rings 13 that are equal in number and correspond to the round rods 12, the round rods 12 are vertically arranged at the upper end of the cylinder 1, and the circular rings 13 can be slidably mounted on the corresponding round rods 12 up and down, and are connected to the upper end of the heat exchange plate 2 through a connecting piece.

[0027] In this embodiment, the moving track of the heat exchange plate 2 can be further limited by the limiting mechanism so that it can only move up and down.

[0028] Preferably, as another embodiment of the present invention, the heat exchange plate 2 is coated with an anti-corrosion and heat-insulating layer.

[0029] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A coke oven riser heat exchanger with a variable heat area, comprising a riser heat exchanger body, wherein the cylinder (1) of the riser heat exchanger body is arranged vertically, and characterized in that: The heat exchanger (2) further comprises a heat exchange plate (2), a driving mechanism, an upper temperature sensor (3), a middle temperature sensor (4), a lower temperature sensor (5) and a controller. The heat exchange plate (2) is arranged vertically. The upper end of the cylinder (1) is provided with a through hole matching the heat exchange plate (2). The lower end of the heat exchange plate (2) passes through the through hole and is slidably fitted with the hole wall of the through hole. A platform (6) extending outward is horizontally provided at the upper opening of the cylinder (1). The driving mechanism is arranged on the platform (6) and is transmission-connected to the heat exchange plate (2). The driving mechanism drives the lower end of the heat exchange plate (2) to move up and down in the cylinder (1). The upper temperature sensor (3), the middle temperature sensor (4) and the lower temperature sensor (5) are arranged in sequence from top to bottom in the cylinder (1). The driving mechanism, the upper temperature sensor (3), the middle temperature sensor (4) and the lower temperature sensor (5) are respectively electrically connected to the controller.

2. A coke oven riser heat exchanger with a variable heat area as claimed in claim 1, characterized in that: Two strip-shaped grooves (7) corresponding to the heat exchange plate (2) are vertically arranged on the inner wall of the cylinder (1), and the two ends of the heat exchange plate (2) are respectively slidably arranged in the corresponding strip-shaped grooves (7).

3. A coke oven riser heat exchanger with a variable heat area as claimed in claim 2, characterized in that: The heat exchange plate (2) is arranged in the horizontal direction along the radial direction of the cylinder (1).

4. A coke oven riser heat exchanger with a variable heat area as claimed in claim 3, characterized in that: The driving mechanism comprises a motor (8), a driving gear (9), a driven gear (10) and a rack (11); the motor (8) is arranged on the platform (6) and is electrically connected to the controller; the driving gear (9) is arranged on the output shaft of the motor (8); the rack (11) is vertically arranged at one end of the heat exchange plate (2) close to the platform (6) and is transmission-connected to the conveying driving gear through the driven gear (10); the rack (11) is slidably fitted with the bottom wall of the corresponding groove; and the end of the heat exchange plate (2) away from the platform (6) is slidably fitted with the bottom wall of the corresponding groove.

5. A coke oven riser heat exchanger with a variable heat area as claimed in claim 4, characterized in that: It also comprises a limiting mechanism, which is arranged at the upper end of the cylinder (1) and is drivingly connected to an end of the heat exchange plate (2) away from the platform (6), so that when the driving mechanism drives the heat exchange plate (2) to slide up and down, the heat exchange plate (2) remains vertical.

6. A coke oven riser heat exchanger with a variable heat area as claimed in claim 5, characterized in that: The limiting mechanism comprises at least one round rod (12) and circular rings (13) which are equal in number to and corresponding to the round rods (12); the round rods (12) are vertically arranged at the upper end of the cylinder (1); the circular rings (13) are slidably mounted on the corresponding round rods (12) and are connected to the upper end of the heat exchange plate (2) via a connecting piece.

7. A coke oven riser heat exchanger with a variable heat area as claimed in claim 6, characterized in that: The round rods (12) are provided in two pieces, and the two round rods (12) are arranged at intervals on the upper end of the cylinder (1).

8. A coke oven riser heat exchanger with a variable heat area as claimed in any one of claims 1 to 7, characterized in that: The heat exchange plate (2) is coated with an anti-corrosion and heat-insulating layer.

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