Sulfur-sealed tank opened and closed by static pressure of liquid sulfur

Abstract

The utility model discloses a sulfur-sealed tank opened and closed by liquid sulfur static pressure and belongs to the technical field of sulfur recovery equipment. Which comprises a sulfur sealing tank main body, liquid sulfur outlets and liquid sulfur inlets, the liquid sulfur inlets are formed in the bottom of the sulfur sealing tank main body, and the liquid sulfur outlets are symmetrically formed in the two sides of the sulfur sealing tank main body, and is characterized in that an elastic film is arranged in the sulfur sealing tank main body and is arranged on the upper sides of the liquid sulfur outlets, and the sulfur sealing tank main body is divided into an upper part and a lower part by the elastic film; the upper part is a gas phase area, the lower part is a liquid sulfur inlet area, and the elastic film is in socket or fixed connection with the sulfur-sealed tank main body. According to the sulfur sealing tank disclosed by the utility model, the elastic film controls the opening and closing of the through hole in the partition plate by utilizing the pressure of the gas phase region and the liquid sulfur inlet region, so that process gas is prevented from entering a liquid sulfur pool. Compared with a traditional sulfur-sealed tank, equipment is small, investment is low, and inspection and maintenance are convenient; the operation is stable and reliable; and sulfur sealing is not limited by the pressure of a sulfur device.

Description

Technical Field

[0001] The invention discloses a sulfur sealing tank which is opened and closed by utilizing the static pressure of liquid sulfur, and belongs to the technical field of sulfur recovery equipment. Background Art

[0002] In the petrochemical and coal chemical industries, the design pressure of the sulfur recovery unit is approximately 30-70KPa, and the pressure of the liquid sulfur pool is atmospheric pressure or slightly negative. In order to prevent the process gas of the sulfur unit system from entering the liquid sulfur pool, a sulfur sealing tank is installed on each liquid sulfur line from the liquid sulfur outlet of the condenser to the liquid sulfur pool to prevent the process gas of the sulfur unit from entering the liquid sulfur pool.

[0003] The sulfur seal tank of prior art is as follows Figure 3 As shown, liquid sulfur flows from the condenser's liquid sulfur outlet through the sulfur seal tank's liquid sulfur inlet into the central tube, then from the bottom of the central tube into the sulfur seal tank itself, finally exiting through the tank's upper liquid sulfur outlet into the liquid sulfur pool. When the static pressure inside the tank, filled with liquid sulfur, exceeds the system pressure of the sulfur plant, the system's process gas is trapped at the sulfur seal tank's liquid sulfur inlet, preventing it from entering the liquid sulfur pool. This requires a certain height for the tank, typically 4.1 meters. To ensure that liquid sulfur can flow smoothly through the sulfur seal tank into the liquid sulfur pool, the height difference between the condenser's liquid sulfur outlet and the sulfur seal tank's liquid sulfur outlet must be significant. This necessitates placing the sulfur seal tank in an underground tank or raising the entire sulfur production section of the sulfur plant. Using traditional sulfur seal tanks hinders large-scale production and maintenance, limits the design pressure of the sulfur plant, and increases safety risks. Utility Model Content

[0004] The purpose of the technical problem to be solved by the utility model is to overcome the shortcomings of the existing technology and provide a sulfur sealing tank that is small in size, low in cost, and easy to inspect and maintain; easy and stable to operate; and can realize high-pressure production in a sulfur device, thereby improving the processing capacity of the sulfur device, saving device investment, and having a high sulfur conversion rate, and utilizing liquid sulfur static pressure to open and close.

[0005] The utility model solves the technical problem by adopting the following technical solution: a sulfur sealing tank which is opened and closed by the static pressure of liquid sulfur, comprising a sulfur sealing tank body, a liquid sulfur outlet and a liquid sulfur inlet, wherein the liquid sulfur inlet is arranged at the bottom of the sulfur sealing tank body, and the liquid sulfur outlets are symmetrically arranged on both sides of the sulfur sealing tank body; an elastic film is arranged in the sulfur sealing tank body, and the elastic film is arranged on the upper side of the liquid sulfur outlet; the elastic film divides the sulfur sealing tank body into upper and lower parts, the upper part being a gas phase area, and the lower part being a liquid sulfur inlet area; the elastic film is connected to the sulfur sealing tank body by socket or fixed connection.

[0006] Preferably, a partition is provided in the sulfur sealing tank body, the partition is provided at the lower side of the liquid sulfur outlet, a through hole is provided on the partition, the through hole is provided in the middle of the partition, an elastic film is provided on the upper side of the partition, the elastic film can block the through hole of the partition, and the elastic film and the partition form a space for liquid sulfur buffering in the sulfur sealing tank body.

[0007] Preferably, the elastic film is in an arc shape, the top of the arc is arranged on the through hole of the partition, and the two ends of the arc are connected to the sulfur sealing tank body by socket or fixed connection.

[0008] Preferably, both ends of the sulfur sealing tank body are flange structures.

[0009] Preferably, the main body of the sulfur sealing tank is a jacket structure, and steam heating is provided in the jacket.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The utility model discloses a sulfur sealing tank which is opened and closed by utilizing the static pressure of liquid sulfur. An elastic film is arranged in a main body of the sulfur sealing tank. The elastic film divides the main body of the sulfur sealing tank into two spaces, an upper space being a gas phase zone, and a lower space being a liquid sulfur inlet zone. A liquid sulfur inlet is arranged at the bottom of the main body of the sulfur sealing tank. The elastic film controls the opening and closing of a through hole on a partition by utilizing the pressure of the gas phase zone and the liquid sulfur inlet zone, thereby preventing process gas from entering a liquid sulfur pool.

[0012] Compared with traditional sulfur seal tanks, this device has the advantages of small equipment, low cost, and easy inspection and maintenance; stable operation, and is not affected by the pressure fluctuation of the sulfur device system, thus eliminating environmental and safety accidents caused by the process gas breaking through the sulfur seal due to the sudden pressure increase of the sulfur device; it can realize high-pressure production of the sulfur device, thereby improving the processing capacity of the sulfur device, saving device investment, and high sulfur conversion rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of the utility model;

[0014] Figure 2 This is a schematic diagram of the connection between the utility model and the sulfur device;

[0015] Figure 3 It is a structural diagram of a sulfur sealing tank in the prior art.

[0016] In the figure: 1. Sulfur sealing tank body; 2. Liquid sulfur outlet; 3. Liquid sulfur outlet area; 4. Elastic film; 5. Liquid sulfur inlet area; 6. Gas phase area; 7. Partition; 8. Condenser; 81. Condenser liquid sulfur outlet; 82. Condenser gas phase outlet; 9. Center tube. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention must go beyond these limited embodiments. For some equivalent replacement solutions or common means, they will not be described in detail herein, but they still fall within the scope of protection of this application.

[0018] Figures 1 to 3 This is the best embodiment of the present invention, Figure 1 ~Attached Figure 3 The utility model is further described.

[0019] A sulfur seal tank that utilizes the static pressure of liquid sulfur to open and close comprises a sulfur seal tank body 1, a liquid sulfur outlet 2, and a liquid sulfur inlet. The liquid sulfur inlet 2 is disposed at the bottom of the sulfur seal tank body 1 and is symmetrically disposed on both sides of the sulfur seal tank body 1. An elastic film 4 is disposed within the sulfur seal tank body 1 and is disposed above the liquid sulfur outlet 2. The elastic film 4 divides the sulfur seal tank body 1 into upper and lower parts, the upper part being a gas phase region 6 and the lower part being a liquid sulfur inlet region 5. The elastic film 4 is spliced ​​or fixedly connected to the sulfur seal tank body 1. The present invention discloses a sulfur seal tank that utilizes the static pressure of liquid sulfur to open and close. The sulfur seal tank body comprises an elastic film that is disposed within the sulfur seal tank body and divides the sulfur seal tank body into upper and lower spaces, the upper space being a gas phase region and the lower space being a liquid sulfur inlet region. The liquid sulfur inlet is disposed at the bottom of the sulfur seal tank body. The pressures of the gas phase region and the liquid sulfur inlet region are utilized to cause the elastic film to control the opening and closing of a through hole on a partition, thereby preventing process gas from entering a liquid sulfur pool.

[0020] A partition 7 is provided in the sulfur sealing tank body 1. The partition 7 is arranged at the lower side of the liquid sulfur outlet 2. A through hole is provided on the partition 7. The through hole is provided in the middle of the partition 7. An elastic film 4 is provided on the upper side of the partition 7. The elastic film 4 can block the through hole of the partition 7. The elastic film 4 and the partition 7 form a space for liquid sulfur buffering in the sulfur sealing tank body 1.

[0021] The elastic film 4 is in an arc shape, the top of the arc is arranged on the through hole of the partition 7, and the two ends of the arc are connected to the sulfur sealing tank body 1 by socket or fixed connection. The change of the liquid sulfur amount causes the pressure difference between the gas phase area 6 and the liquid sulfur inlet area 5 to change, and the elastic film 4 is displaced to control the opening and closing of the through hole.

[0022] The sulfur sealing tank body 1 is a jacket structure with steam heating inside. The jacket structure is simple, can withstand high pressure and has strong applicability. The upper and lower ends of the sulfur sealing tank body 1 are flange structures, which are connected to the pipeline of the sulfur device and are easy to disassemble through the flange connection.

[0023] Working principle:

[0024] When the sulfur device is started, since there is no liquid sulfur in the sulfur device, the pressure of the sulfur sealing tank gas phase area 6 is the pressure of the condenser gas phase outlet 82, and there is no liquid flow in the sulfur sealing tank liquid sulfur inlet area 5. The pressure of the liquid sulfur inlet area 5 is the pressure of the condenser liquid sulfur outlet 81. Since the pressure of the condenser gas phase outlet 82 is substantially equal to the pressure of the condenser liquid sulfur outlet 81, the lower edge of the elastic film 4 is tightly attached to the through hole. At this time, the through hole is blocked, and the gas in the liquid sulfur inlet area 5 cannot enter the liquid sulfur outlet area 3. As the liquid sulfur of the sulfur device is generated, the liquid sulfur outlet 81 to the liquid sulfur inlet area 5 of the sulfur sealing tank is liquid sulfur. As sulfur production increases, the pressure in liquid sulfur inlet area 5 is equal to the pressure at condenser liquid sulfur outlet 81 plus the static pressure of the liquid sulfur height between condenser liquid sulfur outlet 81 and the sulfur seal tank liquid sulfur inlet area 5, while the pressure in vapor phase area 6 remains at the pressure at condenser vapor phase outlet 82 (the pressure at condenser vapor phase outlet 82 equals the pressure at condenser liquid sulfur outlet 81). This means that the pressure in sulfur seal tank liquid sulfur inlet area 5 is greater than the pressure in vapor phase area 6, forcing elastic membrane 4 upward and separating from the through-holes in partition 7. Liquid sulfur then flows from liquid sulfur inlet area 5 through the through-holes into liquid sulfur outlet area 3, and then into the liquid sulfur pool through sulfur seal tank liquid sulfur outlet 2. If liquid sulfur production decreases due to various reasons (such as shutdowns), the liquid sulfur height between condenser liquid sulfur outlet 2 and sulfur seal tank liquid sulfur inlet area 5 decreases, causing a drop in static pressure. The pressure in sulfur seal tank liquid sulfur inlet area 5 and the pressure in vapor phase area 6 gradually decrease until they are equal. At this point, the lower edge of elastic membrane 4 gradually moves downward, and the through-holes gradually shrink until they close, preventing process gas from entering the liquid sulfur pool. When the amount of liquid sulfur increases again, the amount of liquid sulfur from the condenser liquid sulfur outlet 81 to the sulfur seal tank liquid sulfur inlet area 5 gradually increases, the height rises, the static pressure increases, the pressure in the sulfur seal tank liquid sulfur inlet area 5 and the pressure in the gas phase area 6 gradually increase. At this time, the lower edge of the elastic film 4 gradually moves upward, and the through hole gradually increases. At this time, the liquid sulfur in the sulfur device enters the liquid sulfur outlet area 3 through the through hole and flows into the liquid-liquid sulfur pool.

[0025] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation thereto. Any person skilled in the art may utilize the above disclosure to modify or remodel the present invention into equivalent embodiments. However, any simple modification, equivalent variation, or modification of the above embodiment that does not depart from the technical content of the present invention and is based on the technical essence of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. A sulfur seal tank that is opened and closed by liquid sulfur static pressure, comprising a sulfur seal tank body (1), a liquid sulfur outlet (2) and a liquid sulfur inlet, wherein the liquid sulfur inlet is arranged at the bottom of the sulfur seal tank body (1), and the liquid sulfur outlet (2) is symmetrically arranged on both sides of the sulfur seal tank body (1), characterized in that: An elastic film (4) is provided in the sulfur sealing tank body (1). The elastic film is provided on the upper side of the liquid sulfur outlet (2). The elastic film (4) divides the sulfur sealing tank body (1) into two parts, the upper part being a gas phase area (6) and the lower part being a liquid sulfur inlet area (5). The elastic film (4) is connected to the sulfur sealing tank body (1) by a socket or fixed connection.

2. The sulfur seal tank opened and closed by liquid sulfur static pressure according to claim 1, characterized in that: A partition (7) is provided in a sulfur sealing tank body (1), the partition (7) being provided at the lower side of a liquid sulfur outlet (2), the partition (7) being provided with a through hole, the through hole being provided in the middle of the partition (7), an elastic film (4) being provided on the upper side of the partition, the elastic film (4) being capable of blocking the through hole of the partition (7), and the elastic film (4) and the partition (7) forming a space for liquid sulfur buffering in the sulfur sealing tank body (1).

3. The sulfur seal tank opened and closed by liquid sulfur static pressure according to claim 1, characterized in that: The elastic film (4) is in an arc shape, the top of the arc is arranged on the through hole of the partition (7), and the two ends of the arc are connected to the sulfur sealing tank body (1) in a socket or fixed manner.

4. The sulfur seal tank opened and closed by liquid sulfur static pressure according to claim 1, characterized in that: Both ends of the sulfur sealing tank body (1) are flange structures.

5. The sulfur seal tank opened and closed by liquid sulfur static pressure according to claim 1, characterized in that: The sulfur sealing tank body (1) is a jacket structure, and steam heating is arranged in the jacket.

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