阅读说明：本技术 一种co和h2深冷分离系统的快速冷却装置及冷却方法 (CO and H2Quick cooling device and cooling method of cryogenic separation system ) 是由 冯玉祥 朱桂生 邵守言 戴小卉 凌晨 唐丽 叶兴平 陈红 于 2019-09-24 设计创作，主要内容包括：本发明公开了一种CO和H_2深冷分离系统的快速冷却装置及冷却方法。它包括液氮储罐以及与液氮储罐连接的液氮气化装置,液氮气化装置连接有气路管线和液路管线,气路管线具有两路气体输出线路,其中一条气体输出线路与冷箱连接,另外一条气体输出线路与火炬连接,液路管线具有三路液体输出线路,其中一条液体输出线路与冷箱连接,另外一条液体输出线路与火炬连接,还有一条液体输出线路与换热器连接。其优点是：通过获得的实时温度改变氮气的状态来实现温度的调节,使其达到可以实现CO和H_2分离的温度,其气路和液路管线之间的有效切换,大大加快了CO和H_2分离过程中降温冷却过程,缩短达到CO和H_2分离条件的时间,从而提高了生产效率。(The invention discloses CO and H 2 Provided are a quick cooling device and a cooling method of a cryogenic separation system. The liquid nitrogen gasification device comprises a liquid nitrogen storage tank and a liquid nitrogen gasification device connected with the liquid nitrogen storage tank, wherein the liquid nitrogen gasification device is connected with a gas path pipeline and a liquid path pipeline, the gas path pipeline is provided with two paths of gas output lines, one of the gas output lines is connected with a cold box, the other gas output line is connected with a torch, the liquid path pipeline is provided with three paths of liquid output lines, one of the liquid output lines is connected with the cold box, the other liquid output line is connected with the torch, and the other liquid output line is connected with a heat exchanger. The advantages are that: the temperature is adjusted by changing the state of the nitrogen through the obtained real-time temperature, so that the temperature can be adjusted to realize CO and H 2 the temperature of the separation, the effective switching between gas and liquid pipelines, greatly accelerates the CO and H 2 The cooling process in the separation process is shortened to reach CO and H 2 The time of the separation condition, thereby improving the production efficiency.)

1. CO and H₂quick cooling device of cryogenic separation system, its characterized in that: the liquid cooling system comprises a liquid nitrogen storage tank (1) and a liquid nitrogen gasification device (2) connected with the liquid nitrogen storage tank (1), wherein the liquid nitrogen gasification device (2) is connected with a gas path pipeline (3) and a liquid path pipeline (4), the gas path pipeline (3) is provided with two gas output lines, one of the gas output lines is connected with a cold box of the cooling system after passing through a first valve (V1), a second valve (V2) and a third valve (V3), the other gas output line is connected with a torch of the cooling system after passing through a fourth valve (V4) and a fifth valve (V5), the liquid path pipeline (4) is provided with three liquid output lines, one of the liquid output lines is connected with the cold box of the cooling system after passing through a first regulating valve (5) and the third valve (V3), the other liquid output line is connected with the torch of the cooling system through a sixth valve (V6) and the fifth valve (V5), and a liquid output line is connected with the heat exchanger through a second regulating valve (6).

2. CO and H according to claim 1₂Quick cooling device of cryogenic separation system, its characterized in that: the gas circuit pipeline (3) and the liquid circuit pipeline (4) can be converged into a main pipeline, and the third valve (V3) is arranged on the main pipeline.

3. CO and H according to claim 2₂Quick cooling device of cryogenic separation system, its characterized in that: the main pipeline is a LLP-CO pipeline.

4. CO and H according to one of claims 1 to 3₂Quick cooling device of cryogenic separation system, its characterized in that: the liquid nitrogen storage tank (1) A pressure gauge is arranged on the torch, and a safety valve (7) is arranged on the inlet line pipeline of the torch.

5. CO and H according to claim 4₂Quick cooling device of cryogenic separation system, its characterized in that: the heat exchanger is a plate heat exchanger.

6. CO and H according to claim 5₂Quick cooling device of cryogenic separation system, its characterized in that: and a seventh valve (V7) is arranged between the liquid nitrogen storage tank (1) and the liquid nitrogen gasification device (2).

7. CO and H₂the quick cooling method of the cryogenic separation system is characterized by comprising the following steps of:

A. supplementing nitrogen, opening a valve V5V, controlling the pressure of a pressure gauge on the liquid nitrogen gasification device to be 0.1-0.2MPa by using a valve V4 IV, opening a valve V1I, a valve V2 II and a valve V3 III, introducing cold nitrogen into the cold box, emptying the supplemented nitrogen through an outlet of the cold box, and controlling the temperature difference of the heat exchanger to be 0-20 ℃ when the cold nitrogen is supplemented;

B. When the temperature of the end face of the cold box is-78 to-100 ℃, closing a gas path pipeline of cold nitrogen, opening a first regulating valve (5) and a third valve (V3) and introducing liquid nitrogen into the cold box, and controlling the temperature difference of the heat exchanger to be 0-20 ℃ in the whole process;

C. When the temperature of the end face of the cold box is-130 to-150 ℃, the first regulating valve (5) is closed, the second regulating valve (6) is opened to supplement liquid nitrogen to the heat exchanger, and the temperature difference of the end face of the cold box is controlled to be 0 to 50 ℃.

Technical Field

The invention relates to CO and H₂Cryogenic separation technology, in particular to CO and H₂provided are a quick cooling device and a cooling method of a cryogenic separation system.

Background

Disclosure of Invention

The invention aims to provide a method for accelerating CO and H₂The cooling speed is reduced in the separation process, the time for reaching the separation condition is shortened, and the production efficiency of CO and H is improved₂Provided are a quick cooling device and a cooling method of a cryogenic separation system.

To solve the above technical problems, the present invention provides CO and H₂Quick cooling device of cryogenic separation system, including liquid nitrogen storage tank and the liquid nitrogen gasification device who is connected with liquid nitrogen storage tank, liquid nitrogen gasification device is connected with a gas circuit pipeline and a liquid circuit pipeline, and the gas circuit pipeline has two way gas output line, whereinOne gas output line is connected with a cold box of the cooling system through a first valve V1, a second valve V2 and a third valve V3, the other gas output line is connected with a torch of the cooling system through a fourth valve V4 and a fifth valve V5, the liquid line is provided with three liquid output lines, one liquid output line is connected with the cold box of the cooling system through a first adjusting valve and a third valve V3, the other liquid output line is connected with the torch of the cooling system through a sixth valve V6 and a fifth valve V5, and the other liquid output line is connected with a heat exchanger through a second adjusting valve.

The gas pipeline and the liquid pipeline can be converged into a main pipeline, and the third valve V3 is arranged on the main pipeline.

the main pipeline is a LLP-CO pipeline.

And a pressure gauge is arranged on the liquid nitrogen storage tank, and a safety valve is arranged on the inlet line pipeline of the torch.

The heat exchanger is a plate heat exchanger.

and a No. seven valve V7 is arranged between the liquid nitrogen storage tank and the liquid nitrogen gasification device.

CO and H₂the quick cooling method of the cryogenic separation system is characterized by comprising the following steps of:

A. Supplementing nitrogen, opening a fifth valve V5, controlling the pressure of a pressure gauge PI on the liquid nitrogen gasification device to be 0.1-0.2MPa by using a fourth valve V4, opening a first valve V1, a second valve V2 and a third valve V3, introducing cold nitrogen into a cold box, emptying the supplemented nitrogen through an outlet of the cold box, and controlling the temperature difference of a heat exchanger to be 0-20 ℃ when the cold nitrogen is supplemented;

B. When the temperature of the end face of the cold box is-78 to-100 ℃, closing a gas path pipeline of cold nitrogen, opening a first regulating valve and a third valve V3, and introducing liquid nitrogen into the cold box, wherein the temperature difference of the heat exchanger is controlled to be 0-20 ℃ in the whole process;

C. and when the temperature of the end face of the cold box is-130 to-150 ℃, closing the first regulating valve, opening the second regulating valve to supplement liquid nitrogen to the heat exchanger, and controlling the temperature difference of the end face of the cold box to be 0-50 ℃.

The invention has the advantages that:

because the liquid nitrogen storage tank, the liquid nitrogen gasification device, the gas pipeline and the liquid pipeline which are connected with the liquid nitrogen gasification device are arranged in front of the cooling system, and meanwhile, the gas pipeline and the liquid pipeline are provided with a plurality of mutually matched valves, the temperature is adjusted by changing the state of nitrogen through the obtained real-time temperature, and finally, the temperature can be adjusted to realize CO and H₂The separated temperature, the effective switching between the gas circuit pipeline and the liquid circuit pipeline in the adjusting process greatly accelerates the CO and the H₂The cooling process in the separation process is shortened to reach CO and H₂the time of the separation condition, thereby improving the production efficiency.

drawings

FIG. 1 shows CO and H according to the invention₂A process flow diagram for a rapid cooling device of a cryogenic separation system.

In the figure, 1 is a liquid nitrogen storage tank; 2 is a liquid nitrogen gasification device; 3 is a gas pipeline; 4 is a liquid pipeline; 5 is a regulating valve; 6 is a second regulating valve; 7 is a safety valve; v1 is valve No. one; v2 is valve No. two; v3 is valve No. three; v4 is valve No. four; v5 is valve number five; v6 is a number six valve; v7 is valve No. seven.

Detailed Description

The following description of the present invention will be made with reference to the drawings and the detailed description of the present invention₂The rapid cooling device and cooling method of the cryogenic separation system are further described in detail.