Electronic-grade chlorine production device

Abstract

The utility model relates to an electronic-grade chlorine gas production device which comprises a vaporizer used for vaporizing and heating raw material liquid chlorine to obtain high-pressure chlorine gas; the pre-purifier is connected with the vaporizer and is used for pre-purifying the vaporized high-pressure chlorine; the first-stage heavy component removal system is connected with the pre-purifier and is used for removing heavy components from the purified high-pressure chlorine; and the second-stage light component removal system is connected with the first-stage heavy component removal system and is used for removing light components from the high-pressure chlorine subjected to heavy component removal treatment to obtain rectified liquid chlorine. The device integrates raw material vaporization, adsorption separation and rectification separation, continuous production can be achieved, and the produced electronic-grade chlorine meets the energy-saving and environment-friendly standard.

Description

Technical Field

[0001] The present application relates to the technical field of electronic special gases, and in particular to an electronic grade chlorine production device. Background Art

[0002] Electronic-grade products have high added value and are very profitable. Currently, only a very small number of manufacturers in China produce them. Among them, the common methods for preparing electronic-grade chlorine are mainly adsorption and distillation. Specifically, the photodecomposition adsorption distillation method is to first use a special light source to decompose nitrogen and chlorine, then adsorb to remove part of the water in the chlorine, and then distill to remove the remaining impurities. This process is long, the use of special light sources has high energy consumption and a short service life; the distillation process to prepare electronic-grade chlorine requires multiple de-heavy and de-light distillation towers. Although it does not involve adsorption and the overall process is simple, the number of equipment is large and the energy consumption is high; the adsorption distillation process to prepare electronic-grade chlorine uses silicon tetrafluoride as an adsorbent to absorb moisture, and then the chlorine is de-lightened and de-heaved. The adsorbent used in this process has a short service life, a large number, poor separation effect, and is difficult to handle, and is easy to pollute the environment.

[0003] Therefore, providing a safe, reliable, continuous and environmentally friendly electronic-grade chlorine production device is an urgent problem to be solved. Utility Model Content

[0004] In view of this, the present application proposes an electronic grade chlorine production device to solve the above problems.

[0005] According to one aspect of the present application, there is provided an electronic grade chlorine production device, comprising:

[0006] Vaporizer, used to vaporize and heat the raw liquid chlorine to obtain high-pressure chlorine gas;

[0007] A pre-purifier, connected to the vaporizer, for pre-purifying the vaporized high-pressure chlorine gas;

[0008] A primary de-heavy component system, connected to the pre-purifier, for removing heavy components from the purified high-pressure chlorine gas;

[0009] The secondary light removal system is connected to the primary heavy removal system and is used to remove light components from the high-pressure chlorine gas after heavy removal treatment to obtain liquid chlorine after distillation.

[0010] In a possible implementation, the primary deweighting system includes a primary deweighting tower, a deweighting tower condenser, and a first reboiler;

[0011] One side of the primary deweighting tower is connected to the prepurifier, the deweighting tower condenser is arranged at the top of the primary deweighting tower, and the first reboiler is arranged at the bottom of the primary deweighting tower;

[0012] One end of the top of the deweight removal tower condenser is connected to the gas outlet end of the first deweight removal tower, and the other end of the top is connected to the second light removal tower. The bottom of the deweight removal tower condenser is connected to the liquid inlet end of the first deweight removal tower; the bottom end of the first reboiler is connected to the liquid outlet end of the first deweight removal tower, and the top end of the first reboiler is connected to the gas inlet end of the first deweight removal tower.

[0013] In a possible implementation, the secondary light removal system includes a secondary light removal tower, a light removal tower condenser and a second reboiler;

[0014] One side of the secondary light-removal tower is connected to the gas outlet end of the heavy-removal tower condenser, the heavy-removal tower condenser is arranged at the top of the secondary light-removal tower, and the second reboiler is arranged at the bottom of the secondary light-removal tower;

[0015] The top end of the light-removal tower condenser is connected to the gas outlet end of the secondary light-removal tower, and the bottom end of the light-removal tower condenser is connected to the liquid inlet end of the secondary light-removal tower; the top end of the second reboiler is connected to the gas inlet end of the secondary light-removal tower, and the bottom end of the second reboiler is connected to the liquid outlet end of the secondary light-removal tower.

[0016] In a possible implementation, the method further includes:

[0017] A pneumatic regulating valve, arranged at the liquid inlet end of the vaporizer, for regulating the flow of liquid chlorine entering the vaporizer;

[0018] A flow meter is arranged at the gas outlet end of the vaporizer and is used to adjust the amount of chlorine gas entering the pre-purifier.

[0019] In a possible implementation, the method further includes:

[0020] A condenser is connected to the bottom of the secondary light-removal tower and is used to condense the liquid chlorine after distillation.

[0021] In a possible implementation, the method further includes:

[0022] The finished product tank is connected to the condenser and is used to collect and store the condensed liquid chlorine.

[0023] In a possible implementation, the method further includes:

[0024] The tail gas system is connected to the primary deheaving tower and the secondary deheaving tower respectively, and is used to receive the heavy components discharged from the primary deheaving tower and the light components discharged from the secondary deheaving tower.

[0025] Beneficial effects of this application:

[0026] The electronic-grade chlorine production device of the present application integrates raw material vaporization, adsorption separation and distillation separation, can be produced continuously, and the electronic-grade chlorine produced meets the standards of energy conservation and environmental protection. It includes a vaporizer for vaporizing and heating the raw material liquid chlorine to obtain high-pressure chlorine; a pre-purifier, connected to the vaporizer, for pre-purifying the vaporized high-pressure chlorine; a primary de-heavy system, connected to the pre-purifier, for removing the heavy component of the purified high-pressure chlorine; a secondary de-light system, connected to the primary de-heavy system, for removing the light component of the high-pressure chlorine after the de-heavy treatment, and obtaining liquid chlorine after distillation. It should be noted that, since the water in the heavy component is easy to react with chlorine, and the strong acid produced after the reaction is corrosive, the present application first sets a primary de-heavy system to remove the heavy component, and then sets a secondary de-light system to remove the light component, so that the heavy component can be removed first, thereby ensuring that the gas entering the secondary de-light system is free of water, and no corrosive acidic substances will be produced, thereby ensuring the service life of the device, and effectively saving production and maintenance costs.

[0027] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the present application and, together with the description, serve to explain the principles of the present application.

[0029] Figure 1 The main structure diagram of the electronic grade chlorine production device according to the embodiment of the present application is shown. DETAILED DESCRIPTION

[0030] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0031] Among them, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application or simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0034] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, components and circuits well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0035] like Figure 1 As shown, according to one aspect of the present application, an electronic grade chlorine production device is provided, comprising:

[0036] The vaporizer 100 is used to vaporize and heat the raw liquid chlorine to obtain high-pressure chlorine gas;

[0037] A pre-purifier 200, connected to the vaporizer 100, for pre-purifying the vaporized high-pressure chlorine gas;

[0038] A primary de-heavy system 300, connected to the pre-purifier 200, for removing heavy components from the purified high-pressure chlorine gas;

[0039] The secondary light removal system 400 is connected to the primary heavy removal system 300 and is used to remove light components from the high-pressure chlorine gas after heavy removal treatment to obtain liquid chlorine after distillation.

[0040] The electronic-grade chlorine production device of the present application integrates raw material vaporization, adsorption separation and distillation separation, can be produced continuously, and the electronic-grade chlorine produced meets the standards of energy conservation and environmental protection. It should also be noted that, since the moisture in the heavy component is easy to react with chlorine, and the strong acid produced after the reaction is corrosive, the present application first sets up a primary de-heavy system 300 to remove the heavy component, and then sets up a secondary de-light system 400 to remove the light component, so that the heavy component can be removed first, thereby ensuring that the gas entering the secondary de-light system 400 is free of moisture, and no corrosive acidic substances will be produced, thereby ensuring the service life of the device, and effectively saving production and maintenance costs.

[0041] In a possible implementation, the primary deweighting system 300 includes a primary deweighting tower 310, a deweighting tower condenser 320, and a first reboiler 330;

[0042] One side of the primary deweighting tower 310 is connected to the prepurifier 200, the deweighting tower condenser 320 is arranged at the top of the primary deweighting tower 310, and the first reboiler 330 is arranged at the bottom of the primary deweighting tower 310;

[0043] One end of the top of the de-weighting tower condenser 320 is connected to the gas outlet end of the first de-weighting tower 310, and the other end of the top is connected to the second de-lightening tower 410. The bottom of the de-weighting tower condenser 320 is connected to the liquid inlet end of the first de-weighting tower 310; the bottom end of the first reboiler 330 is connected to the liquid outlet end of the first de-weighting tower, and the top end of the first reboiler 330 is connected to the gas inlet end of the first de-weighting tower.

[0044] In this embodiment, the purified high-pressure chlorine gas enters the primary de-weighting tower 310 to remove the heavy components in the high-pressure chlorine gas. Specifically, after the high-pressure chlorine gas mixed with the heavy components and the light components enters the primary de-weighting tower 310, it flows to the top of the primary de-weighting tower 310, enters the de-weighting tower condenser 320 set at the top of the tower, and liquefies the mixed gas through the de-weighting tower condenser 320 set at -40°C. Among them, the gas of the light component cannot be liquefied at -40°C, and thus is discharged into the secondary de-lighting tower 410 through the top of the de-weighting tower condenser 320, and the high-pressure chlorine gas mixed with the heavy components is condensed into a liquid state through the condenser, and then flows to the tower bottom of the primary de-weighting tower 310, enters the first reboiler 330 set in the tower bottom, and is heated by the first reboiler 330, so that the liquid chlorine is vaporized again and flows to the top of the tower, while the gas of the heavy component cannot be liquefied and is temporarily retained in the tower bottom of the primary de-weighting tower 310. At the same time, the gas vaporized by the reboiler is liquefied again through the de-weighting tower condenser 320 at the top of the tower, and the light components that were not liquefied for the first time are continuously discharged into the secondary de-weighting tower 410, and the remaining gas that is not liquefied is discharged into the primary de-weighting tower 310 again, flows to the tower kettle, and is heated and vaporized by the reboiler again, and the cycle is repeated until the de-weighting component treatment of the high-pressure liquid chlorine is achieved. It should be noted that the heavy components in this application are water, nitrogen trichloride, and metal ions. By removing the water from the heavy components, the chlorine gas will not combine with water to produce corrosive acidic substances in the future, thereby ensuring the service life of the device.

[0045] In a possible implementation, the secondary light removal system 400 includes a secondary light removal tower 410, a light removal tower condenser 420, and a second reboiler 430;

[0046] One side of the secondary light-removing tower 410 is connected to the gas outlet end of the heavy-removing tower condenser 320, the heavy-removing tower condenser 320 is arranged at the top of the secondary light-removing tower 410, and the second reboiler 430 is arranged at the bottom of the secondary light-removing tower 410;

[0047] The top end of the light-removal tower condenser 420 is connected to the gas outlet end of the secondary light-removal tower 410, and the bottom end of the light-removal tower condenser 420 is connected to the liquid inlet end of the secondary light-removal tower 410; the top end of the second reboiler 430 is connected to the gas inlet end of the second light-removal tower, and the bottom end of the second reboiler 430 is connected to the liquid outlet end of the second light-removal tower.

[0048] In this embodiment, after the chlorine gas from which the heavy components are removed enters the secondary light-removal tower 410, the light components therein are removed through the secondary light-removal tower 410. Specifically, after high-pressure chlorine and other light component gases enter the secondary light-removing tower 410, they flow to the top of the tower and enter the light-removing tower condenser 420 arranged at the top of the tower, wherein the light components cannot be condensed in the light-removing tower condenser 420, and therefore after being discharged from the light-removing tower condenser 420 into the secondary light-removing tower 410, they are concentrated at the top of the secondary light-removing tower 410, and the chlorine can be liquefied in the light-removing tower condenser 420, and therefore after being condensed by the light-removing tower condenser, they flow to the tower bottom and enter the second reboiler 430 arranged in the tower bottom, and are heated and vaporized by the second reboiler 430, so that the chlorine obtained after vaporization flows to the top of the tower again, and the gas is liquefied again by the light-removing tower condenser 420, and the light components mixed in the chlorine are further removed, and the cycle is repeated, so that the light components in the chlorine are temporarily concentrated at the top of the secondary light-removing tower 410, and the chlorine after distillation is liquefied in the reboiler of the tower bottom, and then discharged into the condenser, and after cooling, it enters the finished product tank for storage. The light components of this embodiment include oxygen, nitrogen, argon, hydrogen, carbon monoxide, trace carbon dioxide, and hydrocarbon gases. Since the water has been removed in the primary de-heavy system 300, no acidic corrosive substances will be generated in the secondary de-heavy tower 410, thereby saving the maintenance cost of the secondary de-heavy tower 410.

[0049] In a possible implementation, the method further includes:

[0050] A pneumatic regulating valve, provided at the liquid inlet end of the vaporizer 100, for regulating the flow of liquid chlorine entering the vaporizer 100;

[0051] A flow meter is provided at the gas outlet of the vaporizer 100 and is used to adjust the amount of chlorine gas entering the pre-purifier 200 .

[0052] In this embodiment, the raw material enters the vaporization stage first. Specifically, the raw material liquid chlorine is regulated to a certain flow rate by a pneumatic regulating valve and enters the liquid chlorine vaporizer 100E0, and hot water is used to vaporize and heat the liquid chlorine. The vaporized and pressurized raw material chlorine gas is measured by a flow meter and enters the pre-purifier 200 for purification.

[0053] It should be noted that in the pre-purification section, the vaporized chlorine enters the chlorine pre-purifier 200PA0 for deep dehydration and carbon dioxide removal. The pre-purification uses molecular sieves to dehydrate and remove carbon dioxide gas, and the water and carbon dioxide in the raw chlorine are removed to below 1ppm. The purified chlorine enters the deweighting tower for distillation.

[0054] The heat source of the distillation section adopts circulating hot water to heat the first reboiler 330 and the second reboiler 430 arranged in the tower bottom; the cold source adopts chilled water to cool the light removal tower condenser 420 and the heavy removal tower condenser 320 at the top of the tower. In a possible implementation, it also includes: an exhaust system, which is connected to the first heavy removal tower 310 and the second light removal tower 410 respectively, and is used to receive the heavy components discharged from the first heavy removal tower 310 and the light components discharged from the second light removal tower 410. Specifically, the purified chlorine enters the de-heavy tower for distillation and separation, and the bottom of the de-heavy tower discharges the liquefied heavy components such as trace amounts of water, nitrogen trichloride, and metal ions into the tail gas system, while the de-heavy chlorine flows out from the top gas phase of the de-heavy tower into the de-light tower for distillation, and the top condenser of the de-light tower discharges unvaporized gases such as oxygen, nitrogen, argon, hydrogen, carbon monoxide, trace amounts of carbon dioxide, and hydrocarbon gases into the tail gas system. The liquid chlorine after de-heavy and de-light processes is temporarily stored in the bottom of the de-light tower.

[0055] In a possible implementation, the method further includes:

[0056] The condenser 500 is connected to the bottom of the secondary light removal tower 410 and is used to condense the liquid chlorine after distillation.

[0057] In a possible implementation, the method further includes:

[0058] The finished product tank 600 is connected to the condenser 500 and is used to collect and store the condensed liquid chlorine.

[0059] That is, the product liquid 6N electronic grade chlorine (≥99.9999%) in the bottom of the lightness removal tower is cooled by the product condenser (E5) and then enters the finished product tank (V0) for storage, thereby achieving the purpose of producing electronic grade chlorine.

[0060] In summary, the electronic-grade chlorine production device of the present application is cleverly designed, safe and reliable, can be continuously produced, integrates raw material vaporization, adsorption separation, and distillation separation, and can produce environmentally friendly and energy-saving 6N electronic-grade chlorine. And it can be deeply adsorbed, the equipment is simple, the number of process equipment is small, and the overall energy consumption of the process is low. At the same time, it should also be noted that, because the moisture in the heavy component is easily reacted with chlorine, and the strong acid produced after the reaction is corrosive, the present application first sets a first-level de-heavy tower 310 to remove the heavy component, and then sets a second-level light-removing tower 410 to remove the light component, so that the heavy component can be preferentially removed, thereby ensuring that the gas entering the second-level light-removing tower 410 is free of moisture, and corrosive acidic substances will not be produced, thereby ensuring the service life of the second-level light-removing tower 410, effectively saving production and maintenance costs.

[0061] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An electronic grade chlorine production device, characterized in that: include: Vaporizer, used to vaporize and heat the raw liquid chlorine to obtain high-pressure chlorine gas; A pre-purifier, connected to the vaporizer, for pre-purifying the vaporized high-pressure chlorine gas; A primary de-heavy component system, connected to the pre-purifier, for removing heavy components from the purified high-pressure chlorine gas; The secondary light removal system is connected to the primary heavy removal system and is used to remove light components from the high-pressure chlorine gas after heavy removal treatment to obtain liquid chlorine after distillation.

2. The electronic grade chlorine production device according to claim 1, characterized in that: The primary deweighting system comprises a primary deweighting tower, a deweighting tower condenser and a first reboiler; One side of the primary deweighting tower is connected to the prepurifier, the deweighting tower condenser is arranged at the top of the primary deweighting tower, and the first reboiler is arranged at the bottom of the primary deweighting tower; One end of the top of the de-weighting tower condenser is connected to the gas outlet end of the first de-weighting tower, and the other end of the top is connected to the second light de-weighting tower. The bottom of the de-weighting tower condenser is connected to the liquid inlet end of the first de-weighting tower; the bottom end of the first reboiler is connected to the liquid outlet end of the first de-weighting tower, and the top end of the first reboiler is connected to the gas inlet end of the first de-weighting tower.

3. The electronic grade chlorine production device according to claim 2, characterized in that: The secondary light removal system comprises a secondary light removal tower, a light removal tower condenser and a second reboiler; One side of the secondary light-removal tower is connected to the gas outlet end of the heavy-removal tower condenser, the heavy-removal tower condenser is arranged at the top of the secondary light-removal tower, and the second reboiler is arranged at the bottom of the secondary light-removal tower; The top end of the light-removal tower condenser is connected to the gas outlet end of the secondary light-removal tower, and the bottom end of the light-removal tower condenser is connected to the liquid inlet end of the secondary light-removal tower; the top end of the second reboiler is connected to the gas inlet end of the secondary light-removal tower, and the bottom end of the second reboiler is connected to the liquid outlet end of the secondary light-removal tower.

4. The electronic grade chlorine production device according to claim 1, characterized in that: Also includes: A pneumatic regulating valve, arranged at the liquid inlet end of the vaporizer, for regulating the flow of liquid chlorine entering the vaporizer; A flow meter is arranged at the gas outlet end of the vaporizer and is used to adjust the amount of chlorine gas entering the pre-purifier.

5. The electronic grade chlorine production device according to claim 3, characterized in that: Also includes: A condenser is connected to the bottom of the secondary light-removal tower and is used to condense the liquid chlorine after distillation.

6. The electronic grade chlorine production device according to claim 5, characterized in that: Also includes: The finished product tank is connected to the condenser and is used to collect and store the condensed liquid chlorine.

7. The electronic grade chlorine production device according to claim 2 or 3, characterized in that: Also includes: The tail gas system is connected to the primary deheaving tower and the secondary deheaving tower respectively, and is used to receive the heavy components discharged from the primary deheaving tower and the light components discharged from the secondary deheaving tower.

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