Composite air cooler system applied to chlorosilane separation device

By applying a composite air cooler system in the chlorosilane separation unit, precise control of the chlorosilane distillation and condensation process was achieved, solving the problem of high water consumption in traditional heat exchangers and achieving the effects of water saving and improved heat exchange efficiency.

CN223564787UActive Publication Date: 2025-11-18HUBEI XINGRUI SILICON MATERIAL CO LTD
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Patent Information

Application Number
CN202520222684.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-12
Publication Date
2025-11-18
Estimated Expiration
2035-02-12

AI Technical Summary

Technical Problem

Traditional shell-and-tube heat exchangers consume a large amount of circulating cooling water in chlorosilane separation units, especially under high-capacity conditions. Furthermore, composite air coolers require a systematic increase in configuration when used, and existing technologies have failed to effectively utilize their water-saving advantages.

Method used

By adopting a composite air cooler system, through the design of gas phase distribution pipes and liquid phase collection pipes, combined with the precise control of variable frequency fans and water spray volume, the traditional shell and tube heat exchanger is replaced, achieving refined control of the distillation and condensation process of chlorosilane.

Benefits of technology

It significantly reduces the amount of cooling circulating water used, saves water resources, improves heat exchange efficiency, adapts to changes in production load, and reduces enterprise production costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a composite air cooler system applied to a chlorosilane separation device. The composite air cooler system is specifically applied to a condensation process in chlorosilane rectification in organic silicon production. The system comprises a chlorosilane rectifying tower, a chlorosilane tower top gas phase main pipe, a gas phase distribution pipe and a composite air cooler liquid phase collecting pipeline, a tower top gas phase outlet of the chlorosilane rectifying tower is connected with a chlorosilane tower top gas phase main pipe, the chlorosilane tower top gas phase main pipe is connected with a gas phase distribution pipe, the gas phase distribution pipe is connected with a composite air cooler heat exchange tube nest, and the composite air cooler heat exchange tube nest is connected with a composite air cooler liquid phase collecting pipeline. The composite air cooler system is applied to a gas phase condensation link of an organic silicon rectifying tower to replace a traditional shell-and-tube heat exchanger, the application can greatly reduce the consumption of production cooling circulating water, the production load can be matched by adjusting the operation frequency of a fan of the composite air cooler, the consumption of spraying water can be controlled along with the change of weather and environment temperature, and the production efficiency is improved. The environment serves as a low-temperature end, heat transfer is directly conducted, and the heat exchange efficiency is improved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the rectification system of organic silicon chlorosilane separation belongs to the technical field of organic silicon production. BACKGROUND

[0002] The separation of chlorosilane in the production of organic silicon usually uses the way of rectification, and the traditional device often selects a shell-and-tube heat exchanger as the condenser of the rectification tower, and uses the shell-and-tube heat exchanger to take circulating cooling water as the cooling medium. Because the gas-phase material at the top of the rectification tower is much, the condensation amount is huge, and a large amount of circulating water is consumed. Especially when the production capacity of a single set of the chlorosilane separation device is high, the production capacity of the chlorosilane separation device of the applicant reaches 400,000 tons / year, and the most advanced coupling energy-saving system in the industry is applied, and the heat energy loss has been maximized. According to the calculation, the total consumption of circulating cooling water of the chlorosilane separation device during normal operation still needs about 3200m³ / h. The composite air cooler is a new type of heat exchanger developed in recent years, has good heat exchange effect, and is gradually widely used in industrial production in recent years. In the northwest region of China, the price of water resources is expensive, and the use of the composite air cooler can greatly save water resources and reduce the production cost of enterprises. The composite air cooler directly exchanges heat with the environment by relying on the principle of water spraying + air cooling, and the process completely eliminates the use of circulating water and other cooling media. The condensation amount can be accurately controlled through the frequency conversion fan and the water spraying amount, which cannot be achieved by the traditional shell-and-tube heat exchanger. Compared with the traditional shell-and-tube heat exchanger, the composite air cooler is more complex, and systematic increase in configuration is required during actual application to play its function. Therefore, it is necessary to carry out related technical research and innovation on the composite air cooler system applied to the chlorosilane separation device. SUMMARY

[0003] In view of the above problems, the utility model provides a composite air cooler system applied to a chlorosilane separation device, and the condensation process of chlorosilane rectification can be controlled in detail by applying the system.

[0004] The technical scheme of the device of the utility model is as follows:

[0005] A composite air cooler system applied to a chlorosilane separation device, the system comprises: a chlorosilane rectification tower, a chlorosilane tower top gas phase main pipe, a gas phase distribution pipe, and a composite air cooler liquid phase collection pipeline.

[0006] The gas phase outlet of the chlorosilane rectification tower is connected to the chlorosilane tower top gas phase main pipe, the chlorosilane tower top gas phase main pipe is connected to the gas phase distribution pipe, the gas phase distribution pipe is connected to the composite air cooler heat exchange column pipe, and the composite air cooler heat exchange column pipe is connected to the composite air cooler liquid phase collection pipeline.

[0007] The gas phase distribution pipe is composed of a plurality of distribution pipes, the plurality of pipes are symmetrically distributed in space positions, and the pipe distribution series number = main pipe nominal size / sub-pipe nominal size.

[0008] The liquid phase collection pipe is composed of a plurality of distribution pipes, the plurality of pipes are symmetrically distributed in space positions, and the pipe collection stage number = the nominal size of the main pipe / the nominal size of the branch pipe.

[0009] The heat exchange column pipe E1 of the composite air cooler is composed of a plurality of heat exchange column pipe groups, and the number of heat exchange column pipe groups = the number of distribution pipes,

[0010] Each of the gas phase distribution pipes is connected with the inlet pipe of the corresponding heat exchange column pipe group in the heat exchange column pipe of the composite air cooler, that is, the number of heat exchange column pipe groups = the number of distribution pipes.

[0011] Each of the liquid phase collection pipes is connected with the outlet pipe of the corresponding heat exchange column pipe group in the heat exchange column pipe of the composite air cooler.

[0012] The heat exchange column pipe of the composite air cooler is located below the fan circulating spray of the composite air cooler and above the chlorosilane composite air cooler water tank.

[0013] The composite air cooler system is provided with a composite air cooler water tank, and the bottom pipe of the composite air cooler water tank is connected to the inlet of the circulating spray water pump of the composite air cooler. The side of the composite air cooler water tank is provided with a water tank liquid level meter and a water tank pH meter.

[0014] The outlet of the circulating spray water pump of the composite air cooler fan is connected to the spray water pipe, the spray water pipe is connected to the circulating spray of the composite air cooler fan, and the spray water pipe is provided with a spray amount adjusting valve.

[0015] The side of the composite air cooler water tank is provided with a pipe opening connected to a process water pipe, and the process water pipe is provided with a water tank liquid level control valve.

[0016] The composite air cooler fan circulating spray is provided with a composite air cooler variable frequency fan directly above.

[0017] The liquid level of the water tank liquid level meter is controlled by the water tank liquid level control valve during normal production, and the liquid level of the water tank is controlled at 40%-80%.

[0018] The water tank pH meter monitors the pH value in the water tank during normal production, and the normal pH value is 7-8.

[0019] The liquid phase collection pipe is provided with a chlorosilane discharge temperature meter, and the temperature of the chlorosilane discharge temperature meter T is controlled by the spray amount adjusting valve and the rotating speed of the fan composite air cooler variable frequency fan during normal production. The control priority is: spray amount > rotating speed, and the chlorosilane discharge temperature is controlled at 70%-90% of the dew point temperature of the tower top gas phase.

[0020] The composite air cooler system is applied to the gaseous phase condensation link of the organic silicon rectifying tower, replaces the traditional tube-shell heat exchanger, the application can greatly reduce the production cooling circulating water consumption, and can match the production load by adjusting the running frequency of the fan of the composite air cooler, controls the spraying water consumption with the weather and environmental temperature change, utilizes the environment as the low temperature end, directly carries out the heat exchange, improves the heat exchange efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0021] ATTACH Figure 1 The utility model discloses a schematic diagram.

[0022] T1: chlorosilane rectifying tower, G1: chlorosilane tower top gas phase main pipe, G2: gas phase distribution pipe, G3: composite air cooler liquid phase collection pipeline, G4: process water pipeline, G5: spraying water pipeline, G6: liquid phase collection main pipe, E1: composite air cooler heat exchange row pipe, F1: composite air cooler frequency conversion fan, S1: composite air cooler water tank, P1: composite air cooler fan circulation spraying, B1: composite air cooler fan circulation spraying water pump, L1: water tank liquid level meter, A1: water tank PH meter, K1: water tank liquid level control valve, T1: chlorosilane discharge temperature gauge. DETAILED DESCRIPTION

[0023] Example 1

[0024] A composite air cooler system applied to chlorosilane separation device, the system includes: chlorosilane rectifying tower T1, chlorosilane tower top gas phase main pipe G1, gas phase distribution pipe G2, composite air cooler liquid phase collection pipeline G3, process water pipeline G4, spraying water pipeline G5, liquid phase collection main pipe G6, composite air cooler heat exchange row pipe E1, composite air cooler frequency conversion fan F1, composite air cooler water tank S1, composite air cooler fan circulation spraying P1, composite air cooler fan circulation spraying water pump B1, water tank liquid level meter L1, water tank PH meter A1, water tank liquid level control valve K1, chlorosilane discharge temperature gauge T1.

[0025] The top gas phase outlet of chlorosilane rectifying tower T1 is connected with chlorosilane tower top gas phase main pipe G1, chlorosilane tower top gas phase main pipe G1 is connected with gas phase distribution pipe G2, gas phase distribution pipe G2 is connected with composite air cooler heat exchange row pipe E1, and composite air cooler heat exchange row pipe E1 is connected with composite air cooler liquid phase collection pipeline G3.

[0026] Gas phase distribution pipe G2 is composed of a plurality of distribution pipes, and the plurality of pipes are symmetrically distributed in space positions, and the pipe distribution series number = main pipe nominal size / sub-pipe nominal size.

[0027] Liquid phase collection pipe G3 is composed of a plurality of distribution pipes, and the plurality of pipes are symmetrically distributed in space positions, and the pipe collection series number = main pipe nominal size / sub-pipe nominal size.

[0028] The composite air cooler heat exchange column pipe E1 is composed of several groups of heat exchange column pipes, and the number of heat exchange column pipe groups = the number of distribution pipes,

[0029] Each distribution pipe in the gas phase distribution pipe G2 is connected with the inlet pipe of the corresponding heat exchange column pipe group in the composite air cooler heat exchange column pipe E1 respectively.

[0030] Each distribution pipe in the liquid phase collection pipe G3 is connected with the outlet pipe of the corresponding heat exchange column pipe group in the composite air cooler heat exchange column pipe E1 respectively.

[0031] The composite air cooler heat exchange column pipe E1 is located below the composite air cooler fan circulating spray P1 and above the chlorosilane composite air cooler water tank S1.

[0032] The composite air cooler system is provided with a composite air cooler water tank S1, and the pipeline at the bottom of the composite air cooler water tank S1 is connected to the inlet of the composite air cooler circulating spray water pump B1. The side of the composite air cooler water tank S1 is provided with a water tank liquid level meter L1 and a water tank pH meter A1.

[0033] The outlet of the composite air cooler fan circulating spray water pump B1 is connected to the spray water pipeline G5, the spray water pipeline G5 is connected to the composite air cooler fan circulating spray P1, and the spray water pipeline G5 is provided with a spray amount adjusting valve K2.

[0034] The side of the composite air cooler water tank S1 is provided with a pipe opening connected to the process water pipeline G4, and the process water pipeline G4 is provided with a water tank liquid level control valve K1.

[0035] The composite air cooler fan circulating spray P1 is provided with a composite air cooler variable frequency fan F1 directly above it.

[0036] Before the chlorosilane rectification tower is started, the water tank liquid level control valve K1 is opened in advance to supply process water to the composite air cooler water tank S1, the water tank liquid level meter L1 is controlled at 40%-80%, the composite air cooler fan circulating spray water pump B1 is started, the spray amount adjusting valve K2 is opened and the opening degree is adjusted to 100%, the composite air cooler frequency conversion fan F1 is started, and the fan rotating speed is adjusted to 100%. After the chlorosilane rectification tower is started, the gas phase chlorosilane from the top of the chlorosilane rectification tower T1 is distributed into the composite air cooler heat exchange column pipe E1 through the gas phase pipe G1 and the gas phase distribution pipe G2 after being distributed through the gas phase pipe G1 and the gas phase distribution pipe G2. The gas phase chlorosilane in the composite air cooler heat exchange column pipe E1 is condensed into liquid by the spray water and the air flow generated by the fan and enters the composite air cooler liquid phase collecting pipe G3. After being collected, it enters the liquid phase main pipe G6. The temperature meter T1 is arranged on the liquid phase main pipe G6. Subsequently, the spray amount adjusting valve K2 opening degree and the rotating speed of the composite air cooler frequency conversion fan F1 are controlled. The control priority is: spray amount > rotating speed. The chlorosilane discharge temperature is controlled at 70%-90% of the dew point temperature of the gas phase at the top of the tower. The online PH meter A1 is arranged on the water tank. The normal pH value is 6-8.

[0037] In the above technical solution of the present application, when the chlorosilane rectification tower T1 load is 50%, the composite air cooler fan circulating spray water pump B1 is in a stopped state, the water tank liquid level control valve B1 is in a closed state, the rotating speed of the composite air cooler frequency conversion fan F1 is 70%, and the chlorosilane discharge temperature T1 is 70% of the dew point temperature of the gas phase at the top of the tower. At this time, no process water is consumed.

[0038] In the above technical solution of the present application, when the chlorosilane rectification tower T1 load is 70%, the composite air cooler fan circulating spray water pump B1 is in a stopped state, the water tank liquid level control valve B1 is in a closed state, the rotating speed of the composite air cooler frequency conversion fan F1 is 100%, and the chlorosilane discharge temperature T1 is 80% of the dew point temperature of the gas phase at the top of the tower. At this time, no process water is consumed.

[0039] In the above technical solution of the present application, when the chlorosilane rectification tower T1 load is 90%, the composite air cooler fan circulating spray water pump B1 is in an opened state, the water tank liquid level control valve B1 opening degree is 50%, the rotating speed of the composite air cooler frequency conversion fan F1 is 50%, and the chlorosilane discharge temperature T1 is 70% of the dew point temperature of the gas phase at the top of the tower. At this time, process water is consumed.

[0040] In the above technical solution of the present application, when the chlorosilane rectification tower T1 load is 100%, the composite air cooler fan circulating spray water pump B1 is in an opened state, the water tank liquid level control valve B1 opening degree is 80%, the rotating speed of the composite air cooler frequency conversion fan F1 is 60%, and the chlorosilane discharge temperature T1 is 75% of the dew point temperature of the gas phase at the top of the tower. At this time, process water is consumed.

[0041] In the above technical solution of the application, when the load of the chlorosilane rectification tower T1 is 120%, the composite air cooler fan circulating spray water pump B1 is in an open state, the water tank liquid level control valve B1 opening is 100%, the rotating speed of the composite air cooler variable frequency fan F1 is 80%, the chlorosilane discharge temperature T1 is 78% of the dew point temperature of the overhead gas phase, and process water is consumed at this time.

[0042] In the above technical solution of the application, when the load of the chlorosilane rectification tower T1 is within the normal design load, and the on-line PH meter A1 acid-base degree is less than 6, it can be judged that the composite air cooler heat exchange column pipe E1 has leaked, and when the on-line PH meter A1 acid-base degree is greater than 8, it can be judged that the process water is contaminated by alkaline substances.

Claims

1. A composite air cooler system for use in a chlorosilane separation apparatus, comprising: a plurality of air coolers arranged in series; a plurality of air coolers arranged in parallel; and a plurality of air coolers arranged in a combination of series and parallel. The system comprises: chlorosilane rectification column (T1), chlorosilane overhead gas phase main pipe (G1), gas phase distribution pipe (G2), composite air cooler liquid phase collection pipe (G3); The overhead gas phase outlet of the chlorosilane rectification column T1 is connected to the chlorosilane overhead gas phase main pipe (G1), the chlorosilane overhead gas phase main pipe (G1) is connected to the gas phase distribution pipe (G2), the gas phase distribution pipe (G2) is connected to the composite air cooler heat exchange column pipe (E1), and the composite air cooler heat exchange column pipe E1 is connected to the composite air cooler liquid phase collection pipe (G3).

2. The composite air cooler system for use in chlorosilane separation apparatus according to claim 1, characterized in that, The gas phase distribution pipe (G2) is composed of a plurality of distribution pipes, the plurality of pipes are symmetrically distributed in space positions, and the pipe distribution series number = main pipe nominal size / sub-pipe nominal size; The liquid phase collection pipe (G3) is composed of a plurality of distribution pipes, the plurality of pipes are symmetrically distributed in space positions, and the pipe collection series number = main pipe nominal size / sub-pipe nominal size.

3. The composite air cooler system for use in chlorosilane separation apparatus according to claim 2, characterized in that, The composite air cooler heat exchange column pipe E1 is composed of a plurality of heat exchange column pipe groups, and the heat exchange column pipe group number = distribution pipe number, Each distribution pipe in the gas phase distribution pipe (G2) is connected to the inlet pipe of the corresponding heat exchange column pipe group in the composite air cooler heat exchange column pipe (E1); Each distribution pipe in the liquid phase collection pipe (G3) is connected to the outlet pipe of the corresponding heat exchange column pipe group in the composite air cooler heat exchange column pipe (E1).

4. The composite air cooler system for use in chlorosilane separation apparatus according to claim 1, characterized in that, The composite air cooler heat exchange column pipe (E1) is located below the composite air cooler fan circulating spray (P1) and above the chlorosilane composite air cooler water tank (S1).

5. The composite air cooler system for use in chlorosilane separation apparatus according to claim 1, wherein The composite air cooler system is provided with a composite air cooler water tank (S1), and the bottom pipe of the composite air cooler water tank (S1) is connected to the inlet of the composite air cooler circulating spray water pump (B1); the side of the composite air cooler water tank (S1) is provided with a water tank liquid level meter (L1) and a water tank pH meter (A1).

6. The composite air cooler system for use in chlorosilane separation apparatus according to claim 5, characterized in that, The outlet of the composite air cooler fan circulating spray water pump (B1) is connected to the spray water pipe (G5), the spray water pipe (G5) is connected to the composite air cooler fan circulating spray (P1), and the spray water pipe (G5) is provided with a spray amount adjusting valve (K2).

7. The composite air cooler system for use in chlorosilane separation apparatus according to claim 1, wherein The side of the composite air cooler water tank (S1) is provided with a pipe opening connected to a process water pipe (G4), and the process water pipe (G4) is provided with a water tank liquid level control valve (K1).

8. The composite air cooler system for use in chlorosilane separation apparatus according to claim 1, wherein The composite air cooler fan circulating spray (P1) is provided with a composite air cooler variable frequency fan (F1) directly above.