阅读说明：本技术 一种硫磺气化工艺及装置 (Sulfur gasification process and device ) 是由 赖银飞 刘剑 于 2021-08-06 设计创作，主要内容包括：本发明提供了一种硫磺气化工艺及装置,所述工艺包括：第一温度下的液态硫磺自螺旋管式加热炉辐射段下部的介质入口进入辐射段中的螺旋管；控制螺旋管式加热炉辐射段的炉膛温度在第二温度,对所述螺旋管内的液态硫磺进行加热；气态硫磺自加热炉辐射段上部的介质出口以第三温度排出。采用上述技术方案后,可以有效提升硫磺气化的效率与产量。(The invention provides a sulfur gasification process and a device, wherein the process comprises the following steps: liquid sulfur at a first temperature enters a spiral pipe in the radiation section from a medium inlet at the lower part of the radiation section of the spiral pipe type heating furnace; controlling the temperature of a hearth of a radiation section of the spiral tube type heating furnace to be at a second temperature, and heating liquid sulfur in the spiral tube; and discharging the gaseous sulfur from a medium outlet at the upper part of the radiation section of the heating furnace at a third temperature. After the technical scheme is adopted, the efficiency and the yield of sulfur gasification can be effectively improved.)

1. A sulfur gasification process, comprising:

liquid sulfur at a first temperature enters a spiral pipe in the radiation section from a medium inlet at the lower part of the radiation section of the spiral pipe type heating furnace;

controlling the temperature of a hearth of a radiation section of the spiral tube type heating furnace to be at a second temperature, and heating liquid sulfur in the spiral tube;

and discharging the gaseous sulfur from a medium outlet at the upper part of the radiation section of the heating furnace at a third temperature.

2. The sulfur gasification process of claim 2,

a waste heat boiler is arranged at the convection section of the spiral tube type heating furnace;

the process further comprises the steps of:

and the superheated steam generated by the waste heat boiler exchanges heat with the liquid sulfur before entering the radiation section of the heating furnace, and the liquid sulfur is exchanged heat to a first temperature.

3. The process for the gasification of sulphur according to claim 1 or 2,

the first temperature is 150-300 ℃;

the second temperature is 600-900 ℃;

the third temperature is 550-600 ℃.

4. The process for the gasification of sulphur according to claim 1 or 2,

the composition of the gaseous sulfur comprises one or more of S2, S4, S6;

the liquid sulfur also comprises CS₂。

5. A sulfur gasification apparatus, comprising:

the radiant section of the spiral tube type heating furnace is provided with a spiral tube, a medium inlet of the spiral tube is positioned at the lower part of the radiant section, a medium outlet of the spiral tube is positioned at the upper part of the radiant section, and the bottom of the radiant section is provided with a burner;

the spiral tube type heating furnace is used for heating the liquid sulfur entering the spiral tube from the medium inlet at the first temperature at the second temperature, so that the liquid sulfur is discharged from the medium outlet in the form of gaseous sulfur at the third temperature.

6. The sulfur gasification apparatus according to claim 5,

the sulfur gasification device also comprises an inlet heater, and the inlet heater is used for heating the liquid sulfur before entering the radiation section of the heating furnace.

7. The sulfur gasification apparatus of claim 6,

a waste heat boiler is arranged at the convection section of the spiral tube type heating furnace;

the inlet heater is a gas-liquid heat exchanger, the gas-liquid heat exchanger is connected with the waste heat boiler, and superheated steam generated by the waste heat boiler is introduced into the gas-liquid heat exchanger to exchange heat with liquid sulfur before entering the radiation section of the heating furnace.

8. The sulfur gasification apparatus of claim 6,

the inlet heater is a gas-liquid heat exchanger, the gas-liquid heat exchanger is connected with an external pipe network, and superheated steam from the external pipe network is introduced into the gas-liquid heat exchanger to exchange heat with liquid sulfur before entering the radiation section of the heating furnace.

9. The sulfur gasification apparatus of claim 5,

the radiation section of the spiral tube type heating furnace is cylindrical or square box type;

the combustor is provided with at least one combustor which is positioned in the center and/or two sides of the projection of the spiral pipe on the furnace bottom.

10. The sulfur gasification apparatus of any one of claims 5 to 9,

the first temperature is 150-300 ℃;

the second temperature is 600-900 ℃;

the third temperature is 550-600 ℃;

the composition of the gaseous sulfur comprises one or more of S2, S4, S6;

the liquid sulfur also comprises CS₂。

Technical Field

The invention relates to the technical field of chemical rubber, in particular to a sulfur gasification process and a sulfur gasification device.

Background

Insoluble sulfur is a high-grade accelerating agent and a sulfur cross-linking agent in the rubber industry, can greatly improve the performance of rubber compounds, and has great effect on the rubber industry. Wherein the gasification method is the main mode of preparation insoluble sulphur, and to this kind of mode, adopt electric heating to heat the intensification in order to realize sulphur gasification to liquid sulphur among the traditional scheme, along with trade development, the increase of market demand, insoluble sulphur apparatus for producing increases along with it, traditional electric heating can't match production, needs new mode to heat up gasification to sulphur.

Disclosure of Invention

In order to overcome the technical defects, the invention aims to provide a sulfur gasification process and a sulfur gasification device, which can improve the sulfur gasification efficiency and yield.

The invention discloses a sulfur gasification process, which comprises the following steps:

liquid sulfur at a first temperature enters a spiral pipe in the radiation section from a medium inlet at the lower part of the radiation section of the spiral pipe type heating furnace;

controlling the temperature of a hearth of a radiation section of the spiral tube type heating furnace to be at a second temperature, and heating liquid sulfur in the spiral tube;

and discharging the gaseous sulfur from a medium outlet at the upper part of the radiation section of the heating furnace at a third temperature.

Preferably, a waste heat boiler is arranged at the convection section of the spiral tube type heating furnace;

the process further comprises the steps of:

and the superheated steam generated by the waste heat boiler exchanges heat with the liquid sulfur before entering the radiation section of the heating furnace, and the liquid sulfur is exchanged heat to a first temperature.

Preferably, the first temperature is 150-300 ℃;

the second temperature is 600-900 ℃;

the third temperature is 550-600 ℃.

Preferably, the composition of the gaseous sulphur comprises one or more of S2, S4, S6;

the liquid sulfur also comprises CS 2.

The invention also discloses a sulfur gasification device, comprising:

the radiant section of the spiral tube type heating furnace is provided with a spiral tube, a medium inlet of the spiral tube is positioned at the lower part of the radiant section, a medium outlet of the spiral tube is positioned at the upper part of the radiant section, and the center of the bottom of the radiant section is provided with a burner;

the spiral tube type heating furnace is used for heating the liquid sulfur entering the spiral tube from the medium inlet at the first temperature at the second temperature, so that the liquid sulfur is discharged from the medium outlet in the form of gaseous sulfur at the third temperature.

Preferably, the sulphur gasification device further comprises an inlet heater for heating the liquid sulphur before entering the radiant section of the heating furnace.

Preferably, a waste heat boiler is arranged at the convection section of the spiral tube type heating furnace;

the inlet heater is a gas-liquid heat exchanger, the gas-liquid heat exchanger is connected with the waste heat boiler, and superheated steam generated by the waste heat boiler is introduced into the gas-liquid heat exchanger to exchange heat with liquid sulfur before entering the radiation section of the heating furnace.

Preferably, the inlet heater is a gas-liquid heat exchanger, the gas-liquid heat exchanger is connected with an external pipe network, and superheated steam from the external pipe network is introduced into the gas-liquid heat exchanger to exchange heat with liquid sulfur before entering the radiation section of the heating furnace.

Preferably, the radiation section of the spiral tube type heating furnace is cylindrical or square box type;

the combustor is provided with at least one combustor which is positioned in the center and/or two sides of the projection of the spiral pipe on the furnace bottom.

Preferably, the first temperature is 150-300 ℃;

the second temperature is 600-900 ℃;

the third temperature is 550-600 ℃.

The composition of the gaseous sulfur comprises one or more of S2, S4, S6;

the liquid sulfur also comprises CS 2.

After the technical scheme is adopted, compared with the prior art, the method has the following beneficial effects:

1. the spiral tube type heating furnace is adopted for sulfur gasification, so that a better flow pattern can be obtained, a good gasification effect is realized, the sulfur gasification efficiency is improved, and the yield of insoluble sulfur is further improved;

2. the convection section adopts a waste heat boiler to produce steam to recover the waste heat of high-temperature flue gas of the heating furnace, so that the heat efficiency of the heating furnace is improved, and the energy-saving benefit is obvious;

3. the raw materials are preheated by the inlet heater, the inlet temperature is kept stable, the situation that the temperature of the medium at the inlet is reduced, solidified and blocked due to heat dissipation or other reasons can be prevented, and the continuous and stable operation of the device is ensured.

Drawings

FIG. 1 is a schematic flow diagram of a sulfur gasification process according to an embodiment of the present invention;

FIG. 2 is a schematic view of a sulfur gasification apparatus according to an embodiment of the present invention;

FIG. 3 is a transverse cross-sectional view of the radiant section of the sulfur gasification apparatus of FIG. 2;

FIG. 4 is a cross-sectional view of a radiant section of a sulfur gasification apparatus according to another embodiment of the present invention;

FIG. 5 is a cross-sectional view of the radiant section of a sulfur gasification apparatus according to another embodiment of the present invention.

Reference numerals:

100-spiral tube type heating furnace, 110-radiation section, 111-spiral tube, 120-convection section, 121-waste heat boiler, 130-burner and 200-inlet heater.

Detailed Description

The advantages of the invention are further illustrated in the following description of specific embodiments in conjunction with the accompanying drawings.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

Referring to the attached fig. 1, a schematic flow chart of a sulfur gasification process according to an embodiment of the present invention is based on a sulfur gasification apparatus as shown in fig. 2.

The sulfur gasification device comprises a spiral tube type heating furnace 100. The radiation section 110 of the spiral tube type heating furnace 100 is provided with a spiral tube 111, a medium inlet of the spiral tube 111 is positioned at the lower part of the radiation section 110, a medium outlet of the spiral tube 111 is positioned at the upper part of the radiation section 110, and a burner 130 is arranged at the center of the bottom of the radiation section 110. Referring to fig. 3, in the present embodiment, the radiant section 110 of the spiral tube heating furnace 100 is cylindrical, and the burner 130 is disposed at the center of the bottom of the radiant section 110, and the burner 130 is located at the center of the projection of the spiral tube 111 on the furnace bottom. Referring to fig. 4, in another embodiment, the radiation section 110 of the spiral tube type heating furnace 100 is cylindrical, the burner 130 is arranged at the center of the bottom of the radiation section 110, a group (four) of burners are also arranged at the bottom of the radiation section 110 near the furnace wall, and the burners 130 at the center of the furnace bottom and the burners 130 near the furnace wall are positioned at two sides of the projection of the spiral tube 111 on the furnace bottom, so as to heat the furnace tube uniformly on both sides. Referring to fig. 5, in another embodiment, the radiation section 110 of the spiral tube type heating furnace 100 is in a square box shape, the projection of the spiral tube 111 on the furnace bottom is in a runway shape, and burners 130 are arranged on both sides of the projection of the spiral tube 111 on the furnace bottom, so as to uniformly heat the two sides of the furnace tube.

The sulfur gasification process comprises the following steps:

the liquid sulfur at the first temperature enters the spiral tube 111 in the radiation section 110 from the medium inlet at the lower part of the radiation section 110 of the spiral tube type heating furnace 100. The first temperature is preferably 150-300 ℃.

And controlling the temperature of the hearth of the radiation section 110 of the spiral tube type heating furnace 100 to be at a second temperature, and heating the liquid sulfur in the spiral tube 111. Wherein, the temperature of the hearth is controlled by controlling the combustion of the burners 130 in different arrangement forms, and the second temperature is preferably 600-900 ℃. At this time, liquid sulfur (the component at this time is mainly S8) is gasified, and sulfur macromolecules are cracked into small molecules. The liquid sulfur may contain carbon disulfide (CS)₂）。

The gaseous sulfur is discharged from the medium outlet at the upper part of the radiation section 110 of the heating furnace at a third temperature. Namely, the gasified sulfur is discharged from the medium outlet at the upper part of the radiation section 110 at a third temperature, and the third temperature is preferably 550-600 ℃. The composition of the gaseous sulphur comprises one or more of S2, S4, S6. Preferably, the mixture is S2, S4 and S6, and S2 is the main component.

In the process of heating and gasifying the sulfur, the process of heating and gasifying the liquid sulfur is carried out firstly, and the viscosity of the sulfur is increased and then reduced along with the temperature increase during the liquid temperature rise, so that the viscous phenomenon can occur along with the temperature rise. Therefore, the radiant tube system of the heating furnace adopts the spiral tube 111, and the medium adopts a downward-in-upward-out mode, so that the pressure drop can be reduced, and a better flow pattern can be obtained.

Preferably, the sulfur gasification apparatus further comprises an inlet heater 200, wherein the inlet heater 200 is used for heating the liquid sulfur before entering the radiation section 110 of the heating furnace. In this embodiment, the inlet heater 200 is a gas-liquid heat exchanger, the convection section 120 of the spiral tube type heating furnace 100 is provided with a waste heat boiler 121, the gas-liquid heat exchanger is connected to the waste heat boiler 121, and superheated steam generated by the waste heat boiler 121 is introduced into the gas-liquid heat exchanger to exchange heat with liquid sulfur before entering the radiation section 110 of the heating furnace, so as to heat the liquid sulfur at 140-150 ℃ to 150-300 ℃. Preferably, the steam generated by the exhaust-heat boiler 121 can be divided into two parts, one part is used for introducing into the gas-liquid heat exchanger to heat the sulfur, and the other part is merged into a system pipe network. The convection section adopts a waste heat boiler to produce steam to recover the waste heat of high-temperature flue gas of the heating furnace, so that the heat efficiency of the heating furnace can be effectively improved, and the energy-saving benefit is obvious. In some embodiments, the superheated steam generated by the heat recovery steam generator 121 may also be used to heat other media, such as fuel gas and/or combustion air to the combustor 130. Namely, another gas-liquid heat exchanger is provided, the gas-liquid heat exchanger is connected with the waste heat boiler 121 and the burner 130, superheated steam generated by the waste heat boiler 121 exchanges heat with fuel gas and/or combustion air which are led to the burner 130 at the gas-liquid heat exchanger, so as to recover waste heat of flue gas to preheat the fuel gas and/or the combustion air.

The heating furnace medium entry sets up the entry heater, utilizes the steam of convection current section self-production to preheat the raw materials, keeps entry temperature stable, maintains heating furnace operation stability on the one hand, and on the other hand prevents that the entrance from leading to medium temperature reduction, solidification because of heat dissipation or other reasons, blockking up the pipeline, influencing device continuous operation.

In other embodiments, the inlet heater 200 is a gas-liquid heat exchanger, and the gas-liquid heat exchanger is connected to an external pipe network, and superheated steam from the external pipe network is introduced into the gas-liquid heat exchanger to exchange heat with liquid sulfur before entering the radiation section 110 of the heating furnace.

In other embodiments, the inlet heater 200 may also be an electric heater or other type of heater for heating the liquid sulfur to the first temperature before entering the radiant section 110 of the furnace.

It should be noted that the embodiments of the present invention have been described in terms of preferred embodiments, and not by way of limitation, and that those skilled in the art can make modifications and variations of the embodiments described above without departing from the spirit of the invention.