Sulfur dioxide conversion cooling device in sulfonation industry

Abstract

The utility model discloses a sulfur dioxide conversion cooling device in sulfonation industry, which comprises a conversion tower, a catalyst filler is mounted in the conversion tower, a feed cooler is arranged at the upper end of the catalyst filler, and a process air inlet pipeline extending into the conversion tower is further mounted on one side of the conversion tower. When conversion is carried out through the catalyst filler, it is guaranteed that heat emitted in the process of converting sulfur dioxide into sulfur trioxide can be effectively replaced, under the condition that the conversion rate of the first layer and the second layer of the conversion tower is insufficient, reverse reaction caused by over-high air inlet temperature of the third layer is avoided, meanwhile, a third-layer feeding cooler of the conversion tower is additionally arranged, the process air consumption is reduced, and the production cost is reduced. Meanwhile, the load of process air cooling and drying system equipment is reduced, the electricity consumption is reduced, the pressure borne by meteorological pipelines and equipment of the whole sulfonation production device is reduced, the safety risk of sulfonation production is reduced, and the service life of the equipment can be further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfur dioxide conversion, in particular to a sulfur dioxide conversion cooling device in the sulfonation industry. Background Art

[0002] Sulfonation industry occupies an important position in my country's modern chemical industry. Products obtained through sulfonation reaction are widely used in various production and life fields such as daily chemical industry, textile printing and dyeing, oil extraction, industrial additives, etc. The gaseous sulfur trioxide membrane sulfonation process is currently the most widely used production process. This process uses liquid sulfur combustion reaction to generate sulfur dioxide gas, which passes through a sulfur trioxide conversion tower and reacts with oxygen in the process air under a certain temperature under the action of a multi-stage fixed bed catalyst to generate sulfur trioxide gas. After sulfur trioxide is reduced to a suitable temperature, it reacts with related organic materials as a sulfonating agent to prepare corresponding products. The air is filtered and sucked into the system by the process blower. It is then cooled by circulating water and ethylene glycol and dried by silica gel before it can be used as process air.

[0003] The conversion of sulfur dioxide into sulfur trioxide is a reversible reaction, and this conversion reaction is an exothermic reaction, so inter-stage cooling is necessary to prevent the catalyst from being sintered and losing its activity due to high temperature and to reduce the occurrence of reverse reactions. Currently, a four-layer conversion tower is generally selected, and the conversion, cooling, and re-conversion are carried out step by step. However, cooling is only carried out before the conversion of the first and second layers, and the third and fourth layers are cooled by adding process air, which has an unsatisfactory cooling effect, and increases system resistance and energy consumption. Utility Model Content

[0004] The utility model aims to solve the problem that the cooling effect in the prior art is not ideal, the system resistance is increased, and the energy consumption is increased, and the following technical solutions are proposed:

[0005] A sulfur dioxide conversion cooling device in the sulfonation industry, comprising a conversion tower,

[0006] A catalyst filler is installed inside the conversion tower, a feed cooler is arranged on the upper end of the catalyst filler, and a process air inlet pipeline extending into the interior is also installed on one side of the conversion tower.

[0007] As an improvement of the above technical solution, a sulfur dioxide inlet is further provided at the upper end of the conversion tower, and a conversion tower outlet is further provided at the lower end of one side of the conversion tower.

[0008] As an improvement of the above technical solution, the catalyst fillers are arranged in four groups inside the conversion tower and are installed equidistantly inside the conversion tower.

[0009] As an improvement of the above technical solution, the feed cooler arranged at the air inlet position of the sulfur dioxide inlet at the upper end of the conversion tower adopts a sulfur dioxide cooler as a cooling mechanism, and a group of feed coolers are arranged on the upper ends of the catalyst packings on the second and third layers.

[0010] As an improvement of the above technical solution, a process air inlet pipeline is installed on the upper end of the last group of catalyst packings located at the bottom, and the air outlets of the process air inlet pipeline are evenly distributed on the upper surface of the catalyst packings.

[0011] As an improvement of the above technical solution, the feed cooler includes a body, a quick-release plate is inserted into one side of the body, a cooling pipe is fixedly installed on the surface of the quick-release plate, and a connecting seat for inserting and connecting the cooling pipe is also provided on one side of the body.

[0012] Beneficial effects of the utility model:

[0013] When the conversion is carried out through the catalyst filler, it is ensured that the heat generated during the conversion of sulfur dioxide into sulfur trioxide can be effectively replaced, and when the conversion rate of the first and second layers of the conversion tower is insufficient, the reverse reaction caused by the inlet temperature of the third layer being too high is avoided. At the same time, the third-layer feed cooler of the conversion tower is increased, the process air consumption is reduced, the power of the process blower is reduced, and the load of the process air cooling and drying system equipment is reduced. The power consumption is reduced, and the pressure on the meteorological pipeline and equipment of the entire sulfonation production unit is reduced, thereby reducing the safety risk of sulfonation production and further extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the main view of the overall structure of the utility model;

[0015] Figure 2 This is a cross-sectional view of the feed cooler of the utility model.

[0016] Figure numerals: 1. conversion tower; 2. catalyst packing; 3. feed cooler; 31. machine body; 32. quick-release plate; 33. cooling pipe; 34. connecting seat; 4. process air inlet pipeline; 5. sulfur dioxide inlet; 6. conversion tower outlet. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution of the present utility model will be clearly and completely described below in conjunction with the embodiments.

[0018] Example

[0019] A sulfur dioxide conversion cooling device in the sulfonation industry, comprising:

[0020] A conversion tower 1, wherein a sulfur dioxide inlet 5 is provided at the upper end of the conversion tower 1, and a conversion tower outlet 6 is provided at the lower end of one side of the conversion tower 1;

[0021] The sulfur dioxide gas entering from the sulfur dioxide inlet 5 is converted by the provided conversion tower 1 and subjected to a temperature reduction treatment. The gas after the conversion is discharged through the conversion tower outlet 6 for subsequent treatment.

[0022] A catalyst packing 2 is installed inside the conversion tower 1. Four groups of catalyst packings 2 are arranged inside the conversion tower 1 and are installed equidistantly inside the conversion tower 1. A feed cooler 3 is arranged on the upper end of the catalyst packing 2.

[0023] Four groups of catalyst fillers 2 are installed inside the conversion tower 1 to convert sulfur dioxide gas into sulfur trioxide gas. In the process of cooling, converting and heating up among the four groups of catalyst fillers 2, the conversion efficiency can be made more stable, thereby improving the conversion efficiency of sulfur dioxide gas.

[0024] The feed cooler 3 disposed at the upper end of the conversion tower 1 at the air inlet position of the sulfur dioxide air inlet 5 adopts a sulfur dioxide cooler as a cooling mechanism, and a set of feed coolers 3 are disposed at the upper ends of the second and third layers of catalyst packing 2;

[0025] The feed cooler 3 arranged at the upper air intake adopts a sulfur dioxide cooler as a cooling mechanism, which can accelerate the cooling treatment of the sulfur dioxide gas entering for the first time, so that it can be quickly converted when passing through a layer of catalyst filler 2 for conversion, and two groups of feed coolers 3 are arranged again at the lower end, which can perform cooling treatment again during the conversion process to increase the catalyst conversion rate.

[0026] A process air inlet pipeline 4 extending into the interior is also installed on one side of the conversion tower 1, and the installation position is located at the upper end of the last group of catalyst packing 2 at the bottom for installation and fixation, and the outlet of the process air inlet pipeline 4 is evenly distributed on the upper surface of the catalyst packing 2;

[0027] When the mixed gas converted by the three-layer catalyst packing 2 enters the fourth group of catalyst packing 2 in the bottom layer for conversion again, the rising temperature decreases, so that the conversion rate is also reduced at the same time. A process air inlet pipeline 4 extending into the interior is installed on one side, which can simultaneously supplement the mixed gas being converted with low-temperature process air for cooling and oxygen at the same time, so that the conversion rate of the catalyst packing 2 entering again is further improved and stabilized.

[0028] The feed cooler 3 comprises a body 31, a quick release plate 32 is plugged into one side of the body 31, a cooling pipe 33 is fixedly mounted on the surface of the quick release plate 32, and a connecting seat 34 for the cooling pipe 33 to be inserted and connected is also provided on one side of the body 31;

[0029] By installing the quick-release plate 32 on one side of the body 31, the internal cooling pipe 33 can be quickly removed when it needs to be disassembled and cleaned, avoiding surface contamination caused by long-term cooling of sulfur dioxide gas. At the same time, the cooling work can be carried out more conveniently when the connecting seat 34 is inserted.

[0030] Working principle: The high-temperature sulfur dioxide and process air mixed gas enters the conversion tower 1 from the sulfur dioxide inlet 5 at the top of the conversion tower 1, and is first cooled to the target temperature by the feed cooler 3 at the upper end, and then contacts the catalyst filler 2 set on the first layer of the conversion tower for conversion and heat release and temperature rise. The high-temperature sulfur dioxide and sulfur trioxide are mixed, and the mixed gas is cooled again by the feed cooler 3 on the second layer of the conversion tower, and then contacts the catalyst filler 2 set on the second layer of the conversion tower for further conversion and temperature rise. After the catalytic conversion of the first and second layers, more than 85% of the sulfur dioxide has been converted into trioxide. The high-temperature mixed gas is then cooled by the feed cooler 3 arranged on the third layer of the conversion tower 1 and is contacted with the catalyst filler 2 arranged on the third layer inside the conversion tower 1 for conversion and heating. When the conversion rate of the three-layer catalyst is about 10%, the temperature rise is relatively low. Then the mixed gas is supplemented with oxygen while cooling the low-temperature process air through the process air inlet pipeline 4, and the conversion rate is further improved and stabilized with the catalyst filler 2 arranged on the fourth layer at the lower end of the conversion tower 1. Finally, the mixed gas is discharged from the conversion tower outlet 6 at the lower end of one side of the conversion tower 1 to enter the next process.

[0031] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.

Claims

1. A sulfur dioxide conversion cooling device in the sulfonation industry, comprising a conversion tower (1), characterized in that: A catalyst filler (2) is installed inside the conversion tower (1), a feed cooler (3) is arranged on the upper end of the catalyst filler (2), and a process air inlet pipeline (4) extending into the interior is also installed on one side of the conversion tower (1); The feed cooler (3) disposed at the upper end of the conversion tower (1) at the inlet position of the sulfur dioxide inlet (5) uses a sulfur dioxide cooler as a cooling mechanism, and a group of feed coolers (3) are disposed at the upper ends of the catalyst packing (2) on the second and third layers; A process air inlet pipeline (4) is installed on the upper end of the last group of catalyst fillers (2) at the bottom, and the air outlets of the process air inlet pipeline (4) are evenly distributed on the upper surface of the catalyst fillers (2).

2. The sulfur dioxide conversion cooling device in the sulfonation industry according to claim 1, characterized in that: The upper end of the conversion tower (1) is also provided with a sulfur dioxide inlet (5), and the lower end of one side of the conversion tower (1) is also provided with a conversion tower outlet (6).

3. The sulfur dioxide conversion cooling device in the sulfonation industry according to claim 1 is characterized in that: The catalyst fillers (2) are arranged in four groups inside the conversion tower (1) and are installed at equal distances inside the conversion tower (1).

4. The sulfur dioxide conversion cooling device in the sulfonation industry according to claim 1, characterized in that: The feed cooler (3) comprises a body (31), a quick-release plate (32) is plugged into one side of the body (31), a cooling pipe (33) is fixedly mounted on the surface of the quick-release plate (32), and a connecting seat (34) is also provided on one side of the body (31) for the cooling pipe (33) to be inserted and connected.

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