Tail gas cooler

Abstract

The utility model discloses a tail gas cooler which comprises a cylinder body, an upper tube plate and a lower tube plate are arranged in the cylinder body, the inner space of the cylinder body is divided into a first space, a second space and a third space by the upper tube plate and the lower tube plate, and a partition plate is arranged in the cylinder body and divides the third space into a first cavity and a second cavity which are independent from each other. Two groups of heat exchange tubes are arranged in the second space, one group of heat exchange tubes are communicated with the first chamber and the first space, and the other group of heat exchange tubes are communicated with the second chamber and the first space; a tail gas inlet is formed in the lower end of the second space; the bottom of the second space communicates with the first discharge outlet, and a plurality of flow blocking components are distributed in the second space. The two sets of heat conduction pipes are directly communicated with the water inlet pipe and the water outlet pipe of cooling liquid, the structure is simple, heat exchange can be efficiently carried out, rapid cooling of electrolytic waste gas is achieved, the electrolytic waste gas is separated in time, and potential safety hazards are avoided.

Description

Technical Field

[0001] The utility model belongs to the field of tail gas treatment and relates to a tail gas cooler applied to a sodium chlorate production line. Background Art

[0002] Sodium chlorate is a water-soluble oxidizing agent, presenting as white crystals. It is thermally unstable and easily deliquescent. Industrial production is achieved through the electrolysis of hot salt water. This process generates waste gas, which, if not promptly treated, can pose a safety hazard and, in severe cases, lead to production accidents and even production halts. Therefore, exhaust gas coolers are often used to separate the exhaust gas. Existing exhaust gas coolers are complex in structure and unsuitable for large-scale electrolytic exhaust gas treatment. They are also subject to corrosion from salt, resulting in a short service life.

[0003] Therefore, it is necessary to improve the existing technology to overcome the defects in the existing technology. Utility Model Content

[0004] The purpose of the utility model is to provide an exhaust gas cooler, which solves the problems existing in the background technology through improvement.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] 18. The heat dissipation device of claim 17, wherein the cooling fan is constructed so that the heat dissipation device can be installed in an off-center position relative to the cooling fan. The cooling fan is constructed so that the heat dissipation device can be installed in an off-center position relative to the cooling fan.

[0007] The cylinder is provided with an exhaust gas outlet, which is located at the upper end of the second space and is connected to the second space; the cylinder is provided with an exhaust gas inlet, which is located at the lower end of the second space and is connected to the second space; the cylinder is provided with a first discharge port, which is connected to the bottom of the second space; and a number of flow-blocking components are staggered and distributed in the second space.

[0008] Furthermore, the heat exchange tube is made of titanium alloy.

[0009] Furthermore, the outer surface of the heat exchange tube is sprayed with a titanium alloy coating.

[0010] Furthermore, the upper tube plate is made of titanium alloy.

[0011] Furthermore, the lower tube plate is made of titanium alloy.

[0012] Furthermore, a sewage pipe communicating with the first chamber and the second chamber is provided at the bottom of the cylinder, a flange is provided at the end of the sewage pipe, and the sewage pipe can be sealed by the flange.

[0013] Furthermore, the heat exchange tubes are vertically arranged in the second space and three adjacent heat exchange tubes are distributed in an isosceles triangle.

[0014] Furthermore, at least three legs are provided at the bottom of the cylinder, and the legs are evenly distributed on the cylinder.

[0015] Furthermore, a second discharge port is provided on the top of the cylinder, and the second discharge port is communicated with the first space.

[0016] Furthermore, the baffle component includes a pull rod and a deflector, one end of the deflector is fixed to the cylinder, one end of the pull rod is locked on the deflector, and the other end of the pull rod is vertically fixed to the upper tube plate or the lower tube plate.

[0017] The above technical solution has the following beneficial effects: Two sets of direct current heat pipes connect the coolant inlet and outlet pipes, resulting in a simple structure and efficient heat exchange, enabling rapid cooling and timely separation of electrolytic waste gas, thus resolving potential safety hazards. Furthermore, the improved material of the heat pipes provides excellent corrosion resistance, thereby extending the service life of the exhaust cooler. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0020] Figure 1 This is a structural diagram provided by the utility model.

[0021] Figure 2 A partial top view structural diagram is provided for the utility model.

[0022] In the figure: 1-cylinder; 2-upper tube sheet; 3-lower tube sheet; 4-partition; 5-heat exchange tube; 6-water inlet pipe; 7-water outlet pipe; 8-exhaust gas outlet; 9-exhaust gas inlet; 10-first discharge port; 11-baffle; 12-pull rod; 13-support leg; 14-sewage pipe; 15-second discharge port; S1-first space; S2-second space; S3-third space; S31-first chamber; S32-second space. DETAILED DESCRIPTION

[0023] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0024] Example

[0025] See also Figure 1-Figure 2 As shown, an exhaust gas cooler includes a cylinder 1, the upper end of which is sealed with a head, and the lower end of which is sealed with a bottom plate, forming a relatively closed space within the cylinder 1. An upper tube sheet 2 and a lower tube sheet 3 are provided within the cylinder 1. These upper and lower tube sheets 2 and 3 separate the interior of the cylinder 1 from top to bottom into a first space S1, a second space S2, and a third space S3. Due to the constraints of the upper and lower tube sheets 2 and 3, the first space S1 and the second space S2, and the second space S2 and the third space S3, are not connected. The second space S2 is the reaction area and has the largest volume, occupying 70% to 80% of the total interior space of the cylinder 1.

[0026] A partition 4 is installed within the cylinder 1, dividing the third space S3 into a first chamber S31 and a second chamber S32. A water inlet pipe 6 is installed on the cylinder 1 and communicates with the first chamber S31, while a water outlet pipe 7 is installed on the cylinder 1 and communicates with the second chamber S32. Several heat exchange tubes 5 are installed within the second space S2. The upper ends of these heat exchange tubes 5 are fixed to the upper tube sheet 2 and communicate with the first space S1, while the lower ends of these tubes 5 are fixed to the lower tube sheet 3 and communicate with the third space S3, forming a connecting channel between the first space S1 and the third space S3. The heat exchange tubes 5 are welded to the upper and lower tube sheets 2 and 3 in a sealed manner, preventing liquid from leaking from the joints between the heat exchange tubes 5, the upper and lower tube sheets 2 and 3.

[0027] In this embodiment, the heat exchange tubes 5 are vertically arranged in the second space, and three adjacent heat exchange tubes are distributed in an isosceles triangle.

[0028] In this embodiment, the heat exchange tubes 5 are separated into two groups of heat exchange tubes 51 and 52 by a partition 4. One group of heat exchange tubes 51 communicates with the first chamber S31, while the other group of heat exchange tubes 52 communicates with the second chamber S32. During operation, the water inlet pipe 6 is connected to an external coolant device. Coolant enters the first chamber S31 through the water inlet pipe 6 and flows upward along the heat exchange tubes 51 into the first space S1. From the first space S1, it flows along the other group of heat exchange tubes 52 into the second chamber S32 and is discharged from the water outlet pipe 7. During this process, all heat exchange tubes 5 in the second space S2 come into contact with the coolant, reducing the temperature of the heat exchange tubes 5.

[0029] The cylinder 1 is provided with an exhaust gas outlet 8 and an exhaust gas inlet 9. The exhaust gas inlet 9 is located at the lower end of the second space S2 and is in communication with the second space S2. The exhaust gas outlet 8 is located at the upper end of the second space S2 and is in communication with the second space S2. Exhaust gas generated by the electrolysis of hot brine to produce sodium chlorate flows into the second space S2 through the exhaust gas inlet 9 and toward the exhaust gas outlet 8. During this process, it comes into contact with the heat exchange tube 5. Due to the coolant contained in the heat exchange tube 5, the pollutants and water vapor in the exhaust gas are cooled into distilled water, which then flows along the heat exchange tube 5 to the bottom of the second space S2.

[0030] In this embodiment, a first discharge port 10 is provided on the cylinder body. The first discharge port 10 is communicated with the bottom of the second space S32 and can discharge the liquid accumulated in the second space.

[0031] In this embodiment, to ensure sufficient contact between the exhaust gas and the heat exchange tubes 5, several flow-blocking components are staggered and distributed within the second space S32. These flow-blocking components include a baffle 11, one end of which is fixed to the cylinder 1. The baffle 11 blocks the upward flow of the exhaust gas, reducing its upward flow velocity and ensuring sufficient contact with the heat exchange tubes 5. To ensure the stability of the installation of the baffle 11, a tie rod 12 is provided on the upper or lower tube sheet. One end of the tie rod 12 is locked to the baffle 11 and secured with a nut, providing support for the baffle.

[0032] In this embodiment, the exhaust gas contains salt. To enhance the durability of the exhaust cooler, a titanium alloy coating is sprayed on the heat exchange tubes, baffles, inner wall of the cylinder, upper tube sheet, and lower tube sheet within the second space S32 to improve the exhaust cooler's corrosion resistance. Of course, the upper tube sheet, lower tube sheet, and heat exchange tubes in this embodiment can also be made directly from titanium alloy. When the titanium alloy coating is sprayed on the heat exchange tubes, copper or aluminum is used to ensure their thermal conductivity.

[0033] In this embodiment, at least three legs 13 are provided at the bottom of the cylinder. The legs are evenly distributed on the cylinder so that the exhaust gas cooler can be placed directly on the ground.

[0034] In this embodiment, a drain pipe 14 is provided at the bottom of the cylinder body, communicating with the first and second chambers. A flange is provided at the end of the drain pipe 14, which can be sealed by a flange. When the coolant in the exhaust gas cooler needs to be drained, the drain pipe 14 can be opened.

[0035] In this embodiment, a second discharge port 15 is provided on the top of the cylinder, which is connected to the first space. When the pressure inside the cylinder is too high due to excessive flow rate or amount of coolant, the second discharge port 15 can be opened to relieve the pressure.

[0036] Each pipe or outlet in this application document adopts a flange to enable it to be connected to external equipment in a standardized manner. It is not necessary to use a sealing plate to lock it on the flange to seal it.

[0037] This application utilizes two sets of direct current heat pipes to connect the coolant inlet and outlet pipes. This simple structure allows for efficient heat exchange, enabling rapid cooling and timely separation of electrolytic waste gas, thus resolving potential safety concerns. Furthermore, the improved material of the heat pipes provides excellent corrosion resistance, thereby extending the service life of the exhaust cooler.

[0038] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. An exhaust gas cooler, characterized in that: The invention comprises a cylinder, wherein an upper tube sheet and a lower tube sheet are arranged in the cylinder, wherein the upper tube sheet and the lower tube sheet divide the inner space of the cylinder into a first space, a second space and a third space from top to bottom, wherein two groups of heat exchange tubes are arranged in the second space, and each group of heat exchange tubes is composed of a plurality of heat exchange tubes; one end of the heat exchange tube is fixed on the upper tube sheet and communicated with the first space, and the other end of the heat exchange tube is fixed on the lower tube sheet and communicated with the third space; a partition is arranged in the cylinder, wherein the partition divides the third space into an independent first chamber and a second chamber, wherein one group of heat exchange tubes is communicated with the first chamber respectively, and the other group of heat exchange tubes is communicated with the second chamber; the first chamber is communicated with a water inlet pipe, and the second chamber is communicated with a water outlet pipe; the liquid in the first chamber flows into the first space along a group of heat exchange tubes, and flows into the second chamber along another group of heat exchange tubes in the first space and is discharged from the water outlet pipe; The cylinder is provided with an exhaust gas outlet, which is located at the upper end of the second space and communicated with the second space; the cylinder is provided with an exhaust gas inlet, which is located at the lower end of the second space and communicated with the second space; the cylinder is provided with a first discharge port, which is communicated with the bottom of the second space; and a plurality of baffle components are staggeredly distributed in the second space.

2. The exhaust gas cooler according to claim 1, characterized in that: The heat exchange tube is made of titanium alloy.

3. The exhaust gas cooler according to claim 1, characterized in that: The outer surface of the heat exchange tube is sprayed with a titanium alloy coating.

4. The exhaust gas cooler according to claim 2 or 3, characterized in that: The upper tube plate is made of titanium alloy.

5. The exhaust gas cooler according to claim 2 or 3, characterized in that: The lower tube plate is made of titanium alloy.

6. The exhaust gas cooler according to claim 1, characterized in that: A sewage pipe communicating with the first chamber and the second chamber is arranged at the bottom of the cylinder, a flange is arranged at the end of the sewage pipe, and the sewage pipe can be blocked by the flange.

7. The exhaust gas cooler according to claim 1, characterized in that: The heat exchange tubes are vertically arranged in the second space and three adjacent heat exchange tubes are distributed in an isosceles triangle.

8. The exhaust gas cooler according to claim 1, characterized in that: The bottom of the cylinder is provided with at least three legs, and the legs are evenly distributed on the cylinder.

9. The exhaust gas cooler according to claim 1, characterized in that: The top of the cylinder is provided with a second discharge port, and the second discharge port is communicated with the first space.

10. The exhaust gas cooler according to claim 1, characterized in that: The baffle component includes a pull rod and a baffle, one end of the baffle is fixed on the cylinder, one end of the pull rod is locked on the baffle, and the other end of the pull rod is vertically fixed on the upper tube plate or the lower tube plate.

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