System for removing crystals from sulfur-containing fuel gas

Abstract

The utility model relates to the technical field of chemical production, in particular to a system for removing crystals from sulfur-containing fuel gas, which is characterized in that a water extraction tank is provided with a fuel gas release pipeline connected with a desulfurized fuel gas inlet pipeline, and a primary spraying pipeline and a secondary spraying pipeline which are sequentially arranged on a desulfurized fuel gas flow path; the distilled water system pipeline is respectively connected to the primary spraying pipeline and the secondary spraying pipeline; the tank bottom discharge pipeline is connected to the tank bottom of the water extraction tank; the fuel gas buffer tank is connected with the tank top of the water extraction tank through a de-crystallization fuel gas pipeline; and a heating furnace removal pipeline is connected with the tank top of the fuel gas buffer tank and is provided with a flame arrester. According to the utility model, the pressure difference of the flame arrester is slowly increased or even no longer increased, so that the switching frequency of the flame arrester is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a technical field of chemical production, concretely to a sulfur-containing fuel gas removal crystallization system. BACKGROUND

[0002] After the desulfurized fuel gas enters the fuel gas buffer tank, it is combusted in the heating and deheating furnace, two standby fire arresters are arranged on the pipeline and are connected in parallel, in the actual production process, the fire arrester being used often needs to be regularly switched and isolated for maintenance as standby due to high pressure difference, the switching is relatively frequent, and the on-site operation difficulty and safety risk are increased. CONTENT

[0003] In view of the defects of the prior art, the utility model provides a sulfur-containing fuel gas removal crystallization system, which slows down the pressure difference rise of the fire arrester or even no longer rises, and thus the switching frequency of the fire arrester is reduced.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a sulfur-containing fuel gas removal crystallization system, which comprises a desulfurized fuel gas inlet pipeline, a water extraction tank, a distilled water system pipeline, a tank bottom discharge pipeline, a fuel gas buffer tank and a deheating furnace pipeline; the water extraction tank is provided with a fuel gas release pipeline connected with the desulfurized fuel gas inlet pipeline, and a primary spray pipeline and a secondary spray pipeline arranged in sequence on the desulfurized fuel gas flow path; the distilled water system pipeline is connected to the primary spray pipeline and the secondary spray pipeline respectively; the tank bottom discharge pipeline is connected to the tank bottom of the water extraction tank; the fuel gas buffer tank is connected to the tank top of the water extraction tank through a desulfurized fuel gas pipeline; the deheating furnace pipeline is connected to the tank top of the fuel gas buffer tank, and the deheating furnace pipeline is provided with a fire arrester.

[0005] Further, the distilled water system pipeline is connected with a steam heater, and the steam heater is connected with a distilled water pipeline.

[0006] Further, an outlet temperature table is arranged on the distilled water system pipeline, close to the outlet position of the steam heater.

[0007] Further, a liquid level meter is arranged on the tank bottom of the water extraction tank.

[0008] Further, a first flow regulating valve is arranged on the tank bottom discharge pipeline, and the first flow regulating valve is electrically connected with the liquid level meter.

[0009] Further, an external discharge stop valve is arranged on the upstream of the first flow regulating valve on the tank bottom discharge pipeline.

[0010] Further, the fire arrester is provided with two and is arranged in parallel.

[0011] Further, the inlet and outlet of the flame arrester are respectively provided with an inlet stop valve and an outlet stop valve.

[0012] Further, a second flow regulating valve is arranged on the de-heating furnace pipeline, close to the overhead outlet of the fuel gas buffer tank.

[0013] Further, a manual regulating valve is arranged between the second flow regulating valve and the flame arrester.

[0014] The beneficial effects of the present application are as follows: the pressure difference of the flame arrester is increased slowly or even not increased, thereby reducing the frequency of switching of the flame arrester. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The process flow chart of the present application is shown in the figure.

[0016] In the figure:

[0017] 100, desulfurized fuel gas inlet pipeline,

[0018] 200, water extraction tank, 210, fuel gas release pipeline, 220, primary spraying pipeline, 230, secondary spraying pipeline, 240, liquid level meter,

[0019] 300, distilled water system pipeline, 310, steam heater, 311, outlet temperature meter, 320, distilled water pipeline,

[0020] 400, tank bottom discharge pipeline, 410, first flow regulating valve, 420, discharge stop valve,

[0021] 500, fuel gas buffer tank,

[0022] 600, de-heating furnace pipeline, 610, flame arrester, 611, first flame arrester, 6111, first inlet stop valve, 6112, first outlet stop valve, 612, second flame arrester, 6121, second inlet stop valve, 6122, second outlet stop valve, 620, second flow regulating valve, 630, manual regulating valve,

[0023] 700, de-crystallized fuel gas pipeline. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0025] A sulfur-containing fuel gas desorption crystalline system comprises a desulfurized fuel gas inlet pipeline 100, a water extraction tank 200, a distilled water system pipeline 300, a tank bottom discharge pipeline 400, a fuel gas buffer tank 500, and a deheater pipeline 600; the water extraction tank 200 is provided with a fuel gas release pipeline 210 connected to the desulfurized fuel gas inlet pipeline 100, and a primary spray pipeline 220 and a secondary spray pipeline 230 arranged in sequence on the desulfurized fuel gas flow path; the distilled water system pipeline 300 is connected to the primary spray pipeline 220 and the secondary spray pipeline 230 respectively; the tank bottom discharge pipeline 400 is connected to the tank bottom of the water extraction tank 200; the fuel gas buffer tank 500 is connected to the tank top of the water extraction tank 200 through a desulfurized fuel gas pipeline 700; the deheater pipeline 600 is connected to the tank top of the fuel gas buffer tank 500, and the deheater pipeline 600 is provided with a flame arrester 610.

[0026] The above-mentioned sulfur-containing fuel gas desorption crystalline system is provided with the water extraction tank 200 upstream of the fuel gas buffer tank 500, the water extraction tank 200 is provided with the primary spray pipeline 220 and the secondary spray pipeline 230, the distilled water system pipeline 300 provides hot distilled water for spraying, dissolves the crystalline contained in the desulfurized fuel gas, avoids the crystalline entering the flame arrester, makes the pressure difference of the flame arrester increase slowly or even no longer increase, and further reduces the switching frequency of the flame arrester.

[0027] Specifically, see Figure 1 The primary spray pipeline 220 can be arranged in the lower part of the inner cavity of the water extraction tank 200, and the secondary spray pipeline 230 can be arranged at the material outlet at the top of the water extraction tank 200, the crystalline is dissolved in a large range through the primary spray pipeline 220, and the crystalline is further dissolved in a small range at the material outlet, the two times of dissolution can optimize the treatment effect, and the arrangement can avoid the crystalline accumulation at the material outlet in a targeted manner, and ensure the normal operation of the water extraction tank 200.

[0028] In an embodiment, the distilled water system pipeline 300 is connected with a steam heater 310, and the steam heater 310 is connected with a distilled water pipeline 320.

[0029] In an embodiment, an outlet temperature table 311 is arranged on the distilled water system pipeline 300, near the outlet position of the steam heater 310. The distilled water is heated to 130-150℃ by the steam heater 310, and this temperature is beneficial to the dissolution of the crystalline. The outlet temperature table 311 can monitor the temperature of the heated steam, and further ensure the effect of dissolving the crystalline.

[0030] In an embodiment, a liquid level meter 240 is arranged at the tank bottom of the water extraction tank 200.

[0031] In an embodiment, a first flow regulating valve 410 is arranged on the tank bottom discharge pipeline 400, and the first flow regulating valve 410 is electrically connected with the liquid level meter 240. The opening of the first flow regulating valve 410 is controlled by the liquid level measured by the liquid level meter 240, the sprayed wastewater is regularly discharged, the water level in the tank 200 is prevented from being too high to affect the spraying system, and the stability of the system operation can be further improved.

[0032] Further, in an embodiment, a discharge stop valve 420 is arranged upstream of the first flow regulating valve 410 on the tank bottom discharge pipeline 400.

[0033] In an embodiment, two flame arresters 610 are arranged, i.e. Figure 1 a first flame arrester 611 and a second flame arrester 612, and the first flame arrester 611 and the second flame arrester 612 are arranged in parallel with each other.

[0034] In an embodiment, the inlet and outlet of the first flame arrester 611 are respectively provided with a first inlet stop valve 6111 and a first outlet stop valve 6112. The inlet and outlet of the second flame arrester 612 are respectively provided with a second inlet stop valve 6121 and a second outlet stop valve 6122.

[0035] The above-mentioned sulfur-containing fuel gas crystallization removal system is provided with valves at the inlet and outlet of the first flame arrester 611 and the second flame arrester 612, the corresponding flame arrester can be isolated according to the need, the production is prevented from being affected due to the failure of the flame arrester, in addition, one standby one use can be realized in the daily production process, and the flexibility of the system can be improved.

[0036] In an embodiment, a second flow regulating valve 620 is arranged on the deheating furnace pipeline 600, close to the tower top outlet of the fuel gas buffer tank 500.

[0037] In an embodiment, a manual regulating valve 630 is arranged between the second flow regulating valve 620 and the flame arrester 610.

[0038] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0040] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise specifically defined and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly contacted through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature. It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this paper are only for illustrative purposes, and are not the only embodiment.

Claims

1. A sulfur-containing fuel gas desulfurization system, characterized by comprising: The application relates to a desulfurized fuel gas inlet pipeline, a water extraction tank, a distilled water system pipeline, a tank bottom discharge pipeline, a fuel gas buffer tank, a deheating furnace pipeline and a fire damper. The water extraction tank is provided with a fuel gas release pipeline connected with the desulfurized fuel gas inlet pipeline and a primary spray pipeline and a secondary spray pipeline arranged in sequence on a desulfurized fuel gas flow path. The distilled water system pipeline is connected with the primary spray pipeline and the secondary spray pipeline respectively. The tank bottom discharge pipeline is connected with a tank bottom of the water extraction tank. The fuel gas buffer tank is connected with a tank top of the water extraction tank through a desulfurized fuel gas pipeline. The deheating furnace pipeline is connected with a tank top of the fuel gas buffer tank, and the deheating furnace pipeline is provided with a fire damper. The distilled water system pipeline is connected with a steam heater connected with a distilled water pipeline.

2. A sulfur-containing fuel gas crystallization system according to claim 1, characterized by: An outlet temperature table is arranged on the distilled water system pipeline and close to an outlet position of the steam heater.

3. A sulfur-containing fuel gas crystallization system according to claim 2, wherein: A liquid level meter is arranged on the tank bottom of the water extraction tank.

4. A sulfur-containing fuel gas crystallization system according to claim 1, wherein: A first flow regulating valve is arranged on the tank bottom discharge pipeline, and the first flow regulating valve is electrically connected with the liquid level meter.

5. A sulfur-containing fuel gas crystallization system according to claim 4, characterized in that: An external discharge stop valve is arranged on the tank bottom discharge pipeline and upstream of the first flow regulating valve.

6. A sulfur-containing fuel gas crystallization system according to claim 5, wherein: Two fire dampers are arranged in parallel.

7. A sulfur-containing fuel gas crystallization system according to claim 1, wherein: An inlet stop valve and an outlet stop valve are arranged on an inlet and an outlet of the fire damper respectively.

8. A sulfur-containing fuel gas crystallization system according to claim 7, characterized in that: A second flow regulating valve is arranged on the deheating furnace pipeline and close to a tower top outlet of the fuel gas buffer tank.

9. A sulfur-containing fuel gas crystallization system according to claim 1, wherein: A manual regulating valve is arranged between the second flow regulating valve and the fire damper.

10. A sulfur-containing fuel gas crystallization system according to claim 9, wherein: ​

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