Gas pipeline jacket heat tracing system of sulfur treatment device

Abstract

The utility model discloses a gas pipeline jacket heat tracing system of a sulfur treatment device, and relates to the technical field of sulfur treatment, gas treated by a sulfur trap is fed into an incinerator through a pneumatic control valve for gas combustion treatment, and the pneumatic control valve is in a closed state during normal operation of the sulfur treatment device; gas treated by the sulfur trap is fed into the fluidized bed boiler for combustion treatment, a gas pipeline adopts a jacket heat tracing form to ensure that the temperature of the pipeline is constant, a jacket heat tracing medium adopts low-pressure steam, and steam condensate after heat tracing is recycled respectively, so that the heat tracing effect is good; the interlocking safety device is additionally arranged, after the interlocking safety device is put into use, when gas is conveyed to the fluidized bed boiler, the risk of gas conveying to the device is greatly reduced, the gas is prevented from entering the fluidized bed boiler, meanwhile, the tempering phenomenon of the boiler is also prevented, personnel conduct remote operation through a computer, and the system automation is high; the device has the advantages of safety, reliability and simplicity in operation.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfur disposal, in particular to a gas pipeline jacket heating system of a sulfur disposal device. Background Art

[0002] The sulfur treatment system is a key system in the industrial field. Most of the sulfur treatment systems use the Holland Holfeng Claus three-stage sulfur recovery system. Since the sulfur treatment system was put into operation, it can meet the sulfur treatment system tail gas outlet SO2 of 960mg / m 3 The national standard requirement is that the discharge outlet concentration should reach 500mg / m 3 , less than the national standard 960mg / m 3 However, the system emission is close to the national standard limit. Once the system fluctuates, it is easy to cause the export exhaust gas to exceed the standard. At present, many provinces in China have increasingly stringent environmental protection requirements and have reduced the SO2 emission value of the sulfur treatment system outlet exhaust gas to 500mg / m 3 In order to avoid environmental problems caused by tail gas emissions due to changes in local standards, it is necessary to seek new tail gas treatment methods to ensure energy conservation and emission reduction in the sulfur treatment system and minimize environmental pressure. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the above prior art and provide a gas pipeline jacket heating system for a sulfur disposal device.

[0004] The utility model solves the technical problem by adopting a technical solution: a gas pipeline jacket heating system for a sulfur treatment device, comprising a sulfur treatment device, a pipeline jacket heating system and an interlocking safety device.

[0005] The sulfur treatment device includes a pneumatic regulating valve. The gas treated by the sulfur collector is sent to the incinerator through the pneumatic regulating valve for gas combustion treatment. The sulfur collector and the incinerator are connected by a gas pipeline. The pneumatic regulating valve is in a closed state during the normal operation of the sulfur treatment device.

[0006] The pipeline jacket heating system comprises a constant temperature heating jacket, which is arranged outside the gas pipeline between the sulfur trap and the fluidized bed boiler. The constant temperature heating jacket is arranged in several sections, and the space between the constant temperature heating jacket and the gas pipeline is filled with heating gas.

[0007] The interlocking safety device includes an emergency shut-off valve before the gas enters the fluidized bed boiler and a field-operated stop valve matched with the emergency shut-off valve. After the fluidized bed boiler is shut down in an emergency, a shutdown signal is sent to the emergency shut-off valve, and the emergency shut-off valve is interlocked and closed to ensure that the gas does not enter the fluidized bed boiler. At the same time, the pneumatic regulating valve for the gas to enter the incinerator is automatically opened to ensure that the gas is switched between the incinerator and the fluidized bed boiler without disturbance.

[0008] Furthermore, the heating gas is low-pressure steam, and the steam condensate after each section of heating is recovered separately to ensure a constant pipeline temperature.

[0009] Furthermore, the constant temperature heating jacket is configured to have four sections, namely, a first section of the constant temperature heating jacket close to the sulfur trap, a fourth section of the constant temperature heating jacket close to the fluidized bed boiler, and a second section of the constant temperature heating jacket and a third section of the constant temperature heating jacket in the middle.

[0010] Furthermore, the constant temperature heating jacket described in each section is equipped with an inlet valve at the starting end and a condensate valve at the end. The low-pressure steam enters between the gas pipeline and the constant temperature heating jacket from the inlet valve to heat the gas pipeline. The condensate formed by the low-pressure steam temperature being lowered after heating is discharged through the condensate valve.

[0011] Furthermore, the fluidized bed boiler is connected with the emergency shut-off valve and the pneumatic regulating valve through signals to achieve interlocking.

[0012] Furthermore, the emergency shut-off valve is connected to the on-site operation stop valve via a gas pipeline.

[0013] Furthermore, the constant temperature heating jacket heats the gas pipeline to ensure that the pipeline temperature is above 120°C.

[0014] The utility model of the gas pipeline jacket heating system of the sulfur disposal device has the following beneficial effects:

[0015] 1. The utility model adds an interlocking safety device. After the interlocking safety device is put into use, during the period when the gas is transported to the fluidized bed boiler, the risk of gas transportation to the device is greatly reduced. When the fluidized bed boiler is shut down, the shutdown signal will be transmitted to the interlocking safety device, automatically closing the emergency shut-off valve of the fluidized bed boiler and opening the pneumatic regulating valve of the incinerator to prevent the gas from entering the fluidized bed boiler and also prevent the boiler from backfire. The system is highly automated and personnel use computers for remote operation, which has the advantages of safety, reliability and simple operation.

[0016] 2. During the commissioning of the gas pipeline jacket heating system, segmented jacket heating is carried out to greatly increase the gas temperature and prevent the liquid flow in the gas from condensing liquid sulfur due to the low pipeline temperature, which may cause pipeline blockage. At the same time, the temperature in the pipeline is not affected by the length of the pipeline. When the length of the pipeline increases, the gas temperature can be guaranteed by increasing the number of jacket heating sections. It has the advantages of good heating effect and wide application range. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] In the figure: 1. incinerator, 2. sulfur trap, 3. inlet valve, 4. condensate valve, 5. emergency shut-off valve, 6. fluidized bed boiler, 7. pneumatic control valve, 8. first section constant temperature heating jacket, 9. second section constant temperature heating jacket, 10. third section constant temperature heating jacket, 11. fourth section constant temperature heating jacket. DETAILED DESCRIPTION

[0020] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0021] Example 1

[0022] like Figure 1 The gas pipeline jacket heating system of the sulfur treatment device shown includes a sulfur treatment device, a pipeline jacket heating system and an interlocking safety device. The sulfur treatment device includes a pneumatic regulating valve 7. The gas treated by the sulfur trap 2 is sent into the incinerator 1 through the pneumatic regulating valve 7 for gas combustion treatment. The sulfur trap 2 is connected to the incinerator 1 through a gas pipeline. The pneumatic regulating valve 7 is in a closed state during normal operation of the sulfur treatment device.

[0023] The gas treated by the sulfur trap 2 is sent to the fluidized bed boiler 6 for combustion through the on-site stop valve. The gas pipeline between the sulfur trap 2 and the fluidized bed boiler 6 is heated by a jacket to ensure constant pipeline temperature. The pipeline jacket heating system includes a constant temperature heating jacket, which is set outside the gas pipeline between the sulfur trap 2 and the fluidized bed boiler 6. The constant temperature heating jacket heats the gas pipeline to ensure that the pipeline temperature is above 120°C. The constant temperature heating jacket is set to four sections, and the space between the constant temperature heating jacket and the gas pipeline is filled with heating gas, which is low-pressure steam. The steam condensate after each section of heating is recovered separately to ensure constant pipeline temperature.

[0024] The four sections of constant temperature heating jackets are respectively the first section of constant temperature heating jacket 8 near the sulfur trap 2, the fourth section of constant temperature heating jacket 11 near the fluidized bed boiler 6, and the middle second section of constant temperature heating jacket 9 and the third section of constant temperature heating jacket 10. Each section of constant temperature heating jacket is equipped with an inlet valve 3 at the starting end and a condensate valve 4 at the end. Low-pressure steam enters between the gas pipeline and the constant temperature heating jacket from the inlet valve 3 to heat the gas pipeline. The condensate formed by the low-pressure steam temperature drop after heating is discharged through the condensate valve 4.

[0025] The interlocking safety device includes an emergency shut-off valve 5 before the gas enters the fluidized bed boiler 6, and a field operation stop valve matched with the emergency shut-off valve 5. The emergency shut-off valve 5 and the field operation stop valve are connected by a gas pipeline. The fluidized bed boiler 6 is connected with the emergency shut-off valve 5 and the pneumatic regulating valve 7 through signals to achieve interlocking. After the fluidized bed boiler 6 is shut down in an emergency, a shutdown signal is sent to the emergency shut-off valve 5, and the emergency shut-off valve 5 is interlocked and closed to ensure that the gas does not enter the fluidized bed boiler 6. At the same time, the pneumatic regulating valve 7 for the gas to enter the incinerator 1 is automatically opened to ensure that the gas is switched between the incinerator 1 and the fluidized bed boiler 6 without disturbance.

[0026] Example 2

[0027] This embodiment is further optimized on the basis of embodiment 1, specifically:

[0028] The fluidized bed boiler 6 is located in a closed plant. During the use of the gas, a GDS combustible gas alarm is added to the fluidized bed boiler 6 and the emergency shut-off valve 5 to ensure that an alarm is triggered in time if gas leaks into the closed space.

[0029] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A gas pipeline jacket heating system for a sulfur disposal device, characterized by: Including sulfur disposal equipment, pipeline jacket heating system and interlock safety device, The sulfur treatment device comprises a pneumatic regulating valve (7), and the gas treated by the sulfur collector (2) is sent into the incinerator (1) through the pneumatic regulating valve (7) for gas combustion treatment. The sulfur collector (2) and the incinerator (1) are connected via a gas pipeline. The pneumatic regulating valve (7) is in a closed state during the normal operation of the sulfur treatment device. The pipeline jacket heating system comprises a constant temperature heating jacket, the constant temperature heating jacket is arranged outside the gas pipeline between the sulfur trap (2) and the fluidized bed boiler (6), the constant temperature heating jacket is arranged into several sections, and the space between the constant temperature heating jacket and the gas pipeline is filled with heating gas, The interlocking safety device comprises an emergency shut-off valve (5) before the gas enters the fluidized bed boiler (6) and a field-operated stop valve matched with the emergency shut-off valve (5). After the fluidized bed boiler (6) is shut down in an emergency, a shut-off signal is sent to the emergency shut-off valve (5), and the emergency shut-off valve (5) is interlocked and closed to prevent the gas from entering the fluidized bed boiler (6). At the same time, the pneumatic regulating valve (7) for the gas to enter the incinerator (1) is automatically opened to ensure that the gas is switched between the incinerator (1) and the fluidized bed boiler (6) without disturbance.

2. A gas pipeline jacket heating system for a sulfur disposal device according to claim 1, characterized in that: The heating gas is low-pressure steam, and the steam condensate after each section of heating is recovered separately to ensure a constant pipeline temperature.

3. The gas pipeline jacket heating system for a sulfur disposal device according to claim 1, characterized in that: The constant temperature heating jacket is configured to have four sections, namely a first section of the constant temperature heating jacket (8) close to the sulfur trap (2), a fourth section of the constant temperature heating jacket (11) close to the fluidized bed boiler (6), and a second section of the constant temperature heating jacket (9) and a third section of the constant temperature heating jacket (10) in the middle.

4. A gas pipeline jacket heating system for a sulfur disposal device according to claim 3, characterized in that: The constant temperature heating jacket of each section is provided with an inlet valve (3) at the starting end and a condensate valve (4) at the end. Low-pressure steam enters between the gas pipeline and the constant temperature heating jacket from the inlet valve (3) to heat the gas pipeline. After the heating, the temperature of the low-pressure steam decreases and the condensate formed is discharged through the condensate valve (4).

5. The gas pipeline jacket heating system for a sulfur disposal device according to claim 1, characterized in that: The fluidized bed boiler (6) is connected to the emergency shut-off valve (5) and the pneumatic regulating valve (7) through signals to achieve interlocking.

6. The gas pipeline jacket heating system for a sulfur disposal device according to claim 1, characterized in that: The emergency shut-off valve (5) is connected to the on-site operation stop valve via a gas pipeline.

7. The gas pipeline jacket heating system for a sulfur disposal device according to claim 1, characterized in that: The constant temperature heating jacket heats the gas pipeline to ensure that the pipeline temperature is above 120°C.

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