Novel reaction gas-water washing and cooling tower for producing carbon disulfide by coke method
Patent Information
- Application Number
- CN202422377864.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-29
AI Technical Summary
In the prior art, during the washing and cooling process of carbon disulfide reaction gas disulfide reaction gas, sulfur crystals can easily block the outlet of the liquid outlet pipe at the bottom of the tower, and the equipment cost is high, and the increase in the spray layer leads to an increase in the equipment cost.
A new coke method is designed to produce carbon disulfide reaction gas water washing and cooling tower, and a guide channel is formed using interlaced semi-sieve plates to achieve full contact and heat exchange between high-temperature reaction gas and low-temperature water, and a water sealing groove is installed at the lower part of the tower body to deposit impurities to prevent clogging.
It effectively reduces the amount of water spray, avoids sulfur crystal blockage, reduces equipment costs, and improves heat exchange efficiency.
Smart Images
Figure CN223159064U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical engineering, in particular to a novel reaction gas water washing and cooling tower for producing carbon disulfide by the coke method. Background Technique
[0002] In the current process of producing carbon disulfide from natural gas, the crude CS2 gas cooled to 180 °C by liquid sulfur washing still needs to be further cooled to achieve a temperature close to the condensation point of CS2 (generally about 60 °C). The reaction gas direct water washing and cooling process, namely the air-conditioning spraying technology, is generally adopted. Taking the CS2 product scale of 30,000 tons / year as an example, it is basically an empty tower with a diameter of 1200 and a height of 6000, and four layers of spray are arranged inside. The crude CS2 gas enters from the lower part of the tower and flows upward in countercurrent contact with the circulating water sprayed from four different heights. The crude CS2 gas is cooled and the gas-phase and liquid-phase sulfur contained therein is partially condensed and precipitated, and is taken out with the circulating water at the bottom of the tower. The crude CS2 gas after being washed and cooled by the circulating water comes out from the top of the tower and goes to the low-temperature condensation separator, and the circulating water at the bottom of the tower is sent to the cooling tower and circulated after being cooled by the cooling water; however, since this cooling section has entered the solidification zone of liquid sulfur, the trace gas-phase and liquid-phase sulfur in the crude CS2 will definitely crystallize and precipitate. This stage is all realized by using an empty tower structure, and the precipitated sulfur solid circulates normally with the washing water and will accumulate at the bottom of the tower and the water outlet at the bottom of the tower, resulting in easy blockage of the liquid outlet pipe of the tower body; and to ensure the washing and cooling efficiency, the tower height is artificially increased and multiple nozzles are set, increasing the equipment cost. Content of the Utility Model
[0003] The purpose of the utility model is to provide a novel reaction gas water washing and cooling tower for producing carbon disulfide by the coke method in order to solve the above problems.
[0004] The utility model realizes the above purpose through the following technical solutions:
[0005] A novel reaction gas water washing and cooling tower for producing carbon disulfide by the coke method includes a tower body. A spray head for spraying low-temperature water is arranged at the top of the tower body. An air inlet for introducing high-temperature reaction gas is arranged on the tower body. A heat exchange area for the full contact and heat exchange between the high-temperature reaction gas and the low-temperature water is arranged inside the tower body. A guiding channel for the flow of the high-temperature reaction gas is arranged in the heat exchange area; a water seal tank is arranged at the lower part of the tower body, and an overflow port communicated with the cooling tower is arranged at the upper part of the water seal tank.
[0006] Preferably, the heat exchange area includes a plurality of staggered half sieve plates. The plurality of half sieve plates are arranged obliquely downward and staggered on the inner wall of the tower body, and a guiding channel for the flow of the high-temperature reaction gas is formed between the half sieve plates and the corresponding inner wall of the tower body.
[0007] Preferably, a spacing is left between the end of the semi-sieve plate and the corresponding inner wall of the tower body to form a guiding channel for the high-temperature reaction gas to pass through the spacing from bottom to top and fully contact and exchange heat with the low-temperature water flowing from top to bottom.
[0008] Preferably, the included angle formed between the axis of the semi-sieve plate and the axis of the tower body is an acute angle.
[0009] Preferably, a circulating water pump is arranged in the cooling water tower, and the circulating water pump is communicated with the spray head through a circulating water pipe.
[0010] The beneficial effects of the present utility model are as follows:
[0011] 1. The present utility model utilizes the guiding channel arranged in the heat exchange area, that is, through the staggered semi-sieve plates. A guiding channel can be formed between the semi-sieve plates and the inner wall of the tower body. The high-temperature reaction gas passes through the guiding channel from bottom to top and fully contacts the low-temperature water flowing from top to bottom, which can ensure the full contact and heat exchange between the high-temperature reaction gas and the low-temperature water and reduce the water spraying amount;
[0012] 2. The present utility model utilizes a water seal tank arranged at the lower part of the tower body. The liquid that has completed washing and cooling flows into the water seal tank. At the same time, impurities such as sulfur crystals also deposit at the bottom of the water seal tank and can be cleaned regularly. The water directly overflows to the cooling water tower through the overflow port at the upper part of the water seal tank. The circulating water cooled by the cooling water tower is pressurized by the circulating pump and circulated and sent to the spray head for spraying again, changing the current situation of sulfur crystal blockage of the water outlet at the bottom of the tower. Description of the Drawings
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model.
[0015] The description of the reference numerals is as follows:
[0016] 1 is the tower body, 2 is the semi-sieve plate, and 3 is the water seal tank. Detailed Embodiments
[0017] The following further explains the technical solutions of the present utility model in conjunction with the attached Figure 1 ,...
[0018] As Figure 1As shown in the figure, a new type of reaction gas water washing and cooling tower for producing carbon disulfide by the coke method includes a tower body 1. A spray head for spraying low-temperature water is provided at the top of the tower body 1. A cooling tower communicated with the tower body is provided on one side of the tower body. The water source of the spray head comes from the cooling tower.
[0019] That is, a circulating water pump is provided in the cooling tower, and the circulating water pump is connected to the spray head through a circulating water pipe. That is to say, the cooled water after heat exchange will flow back into the cooling tower again as a water source to supply the spray head, and continue to spray inside the tower body to realize water circulation.
[0020] Specifically, as Figure 1 shown, an air vent for introducing high-temperature reaction gas is provided on the tower body 1. A heat exchange area for the full contact heat exchange between the high-temperature reaction gas and the low-temperature water is provided inside the tower body 1. A guiding channel for the flow of the high-temperature reaction gas is provided in the heat exchange area. That is to say, after the high-temperature reaction gas is introduced into the tower body through the air vent, at this time, the spray head sprays cool water, that is, low-temperature water, into the tower body. The low-temperature water contacts and exchanges heat with the high-temperature reaction gas flowing from bottom to top in the heat exchange area, realizing the cooling of the high-temperature reaction gas. The sulfur crystallized substances contained in the cooled and liquefied liquid flow downward into the water seal tank and deposit.
[0021] In some embodiments, as Figure 1 shown, the heat exchange area includes a number of half sieve plates 2 arranged staggeredly. A number of the half sieve plates 2 are arranged staggeredly and inclined downward on the inner wall of the tower body 1, and a guiding channel for the flow of the high-temperature reaction gas is formed between the half sieve plate 2 and the corresponding inner wall of the tower body 1. That is to say, a number of half sieve plates are inclined downward, and there is still a gap between the end of the half sieve plate and the corresponding inner wall of the tower body, thus forming a guiding channel for the high-temperature reaction gas to pass through. The low-temperature water and the high-temperature reaction gas fully contact and exchange heat in the guiding channel, reducing the amount of cool water sprayed.
[0022] Specifically, a gap is left between the end of the half sieve plate 2 and the corresponding inner wall of the tower body 1 to form a guiding channel for the high-temperature reaction gas to pass through from bottom to top and fully contact and exchange heat with the low-temperature water flowing from top to bottom. That is to say, one end of the half sieve plate is fixed on the inner wall of the tower body, and there is a gap between the other end of the half sieve plate and the corresponding inner wall of the tower body. A number of half sieve plates and the tower body form an S-shaped guiding channel, which helps to extend the rising time of the high-temperature reaction gas, and thus promotes the full contact heat exchange between the high-temperature reaction gas and the low-temperature water.
[0023] It should be noted that the included angle formed between the axis of the half sieve plate and the axis of the tower body is an acute angle. In this embodiment, the included angle formed between the half sieve plate and the tower body is 60°.
[0024] Specifically, as Figure 1As shown, a water seal tank 3 is provided at the lower part of the tower body 1, and an overflow port communicating with the cooling water tower is provided at the upper part of the water seal tank 3. That is to say, the washing water from the circulating water pump is sprayed down from the top of the tower, contacts the rising reaction gas countercurrently, and is distributed through multiple semi-sieve plates to complete the washing and cooling process. The liquid flows into the water seal tank at the lower part of the tower, and impurities (mainly trace sulfur particles) are deposited at the bottom of the water seal tank and are periodically removed. The water directly overflows to the cooling water tower through the overflow port at the upper part of the water seal tank, and the circulating water cooled by the cooling water is pressurized and circulated by the circulating pump; the 150°C reaction gas from the liquid sulfur washing tower enters the tower from the inlet in the middle and lower part of the tower, is cooled to 60°C by water washing during the rising process, exits from the top of the tower, and goes to the condensation separator.
[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.
Claims
1. A novel reaction gas water washing and cooling tower for producing carbon disulfide by the coke method, comprising a tower body. A spray head for spraying low-temperature water is arranged at the top of the tower body, and an air inlet for introducing high-temperature reaction gas is arranged on the tower body. It is characterized in that, Inside the tower body, there is a heat exchange area for the full contact heat exchange between the high-temperature reaction gas and the low-temperature water. A guiding channel for the flow of the high-temperature reaction gas is arranged in the heat exchange area. A water seal tank is arranged at the lower part of the tower body, and an overflow port communicating with the cooling tower is arranged above the water seal tank.
2. The novel carbon disulfide reaction gas water washing and cooling tower according to claim 1, wherein The heat exchange area includes a number of semi-sieve plates arranged staggeredly. The number of the semi-sieve plates is arranged staggeredly and inclined downward on the inner wall of the tower body, and a guiding channel for the flow of the high-temperature reaction gas is formed between the semi-sieve plate and the corresponding inner wall of the tower body.
3. The novel carbon disulfide reaction gas water washing and cooling tower as described in claim 2, characterized in that, A spacing is left between the end of the semi-sieve plate and the corresponding inner wall of the tower body to form a guiding channel for the high-temperature reaction gas to pass upward through the spacing and fully contact and exchange heat with the low-temperature water flowing downward.
4. The novel carbon disulfide reaction gas water washing and cooling tower as described in claim 2, wherein The included angle formed between the axis of the semi-sieve plate and the axis of the tower body is an acute angle.
5. The novel carbon disulfide reaction gas water washing and cooling tower according to claim 1, characterized in that, A circulating water pump is arranged in the cooling tower, and the circulating water pump is communicated with the spray head through a circulating water pipe.