阅读说明：本技术 一种低温低压制取液氯的工艺流程 (Process flow for preparing liquid chlorine at low temperature and low pressure ) 是由 朱小莉 于 2020-05-20 设计创作，主要内容包括：本发明公开了一种低温低压制取液氯的工艺流程,包括来自电解的氯气进入到缓冲罐中,在氯气罐中进一步的除去氯气中的酸沫、杂质和水分,干燥的氯气进入到氯气分配台中与尾氯混合后,进入到液化器中,在液化器中通过换热管时,通过R22液体和气体转换吸热的原理,使得混合的氯气大部分冷凝液化成液氯,在气液分离器中,液氯和尾氯分离,液氯流入液氯贮槽,尾氯进入尾氯分配台,液氯进入到液氯贮槽后,通过磁力泵进入到分配台充装到检验合格的钢瓶内,尾氯在尾氯分配台后,没有液化的氯气通过管道进入到氯气分配台与干燥的氯气重新混合后。本发明通过设置有一系列的结构使得该工艺流程可以制取液氯的效率得到大大的提高,且制取率高。(The invention discloses a process flow for preparing liquid chlorine at low temperature and low pressure, which comprises the steps of enabling chlorine from electrolysis to enter a buffer tank, further removing acid foams, impurities and moisture in the chlorine in a chlorine tank, enabling dried chlorine to enter a chlorine distribution table to be mixed with tail chlorine and then enter a liquefier, enabling most of mixed chlorine to be condensed into liquid chlorine through the principle of converting R22 liquid and gas to absorb heat when the liquefier passes through a heat exchange pipe, separating the liquid chlorine from the tail chlorine in a gas-liquid separator, enabling the liquid chlorine to flow into a liquid chlorine storage tank, enabling the tail chlorine to enter the tail chlorine distribution table, enabling the liquid chlorine to enter the distribution table through a magnetic pump after the liquid chlorine storage tank is filled into a steel bottle qualified for inspection, enabling tail chlorine to be at the tail chlorine distribution table, enabling non-liquefied chlorine to enter the chlorine distribution table through a pipeline after the tail chlorine is re-mixed with the dried chlorine. The invention greatly improves the efficiency of the process flow for preparing the liquid chlorine by arranging a series of structures and has high preparation rate.)

1. A process flow for preparing liquid chlorine at low temperature and low pressure is characterized by comprising the following steps:

step 1: chlorine from electrolysis enters a buffer tank, acid foam, impurities and moisture in the chlorine are further removed from a chlorine tank, and dry chlorine enters a chlorine distribution table to be mixed with tail chlorine and then enters a liquefier;

step 2: when the mixed chlorine gas passes through the heat exchange tube in the liquefier, most of the mixed chlorine gas is condensed into liquid chlorine by the heat absorption principle of liquid and gas conversion of R22, the liquid chlorine and tail chlorine are separated in the gas-liquid separator, the liquid chlorine flows into the liquid chlorine storage tank, and the tail chlorine enters the tail chlorine distribution table;

and step 3: after the liquid chlorine enters the liquid chlorine storage tank, the liquid chlorine enters a distribution table through a magnetic pump and is filled into a steel cylinder qualified by inspection;

and 4, step 4: and after the tail chlorine is arranged on the tail chlorine distribution platform, the chlorine which is not liquefied enters the chlorine distribution platform through a pipeline to be re-mixed with the dry chlorine, then the chlorine enters the liquefier to be liquefied, and the tail chlorine is put into the hydrochloric acid synthetic furnace to be subjected to the next step of work, or the tail chlorine is introduced into a tail gas absorption tower.

2. The process flow for preparing liquid chlorine at low temperature and low pressure according to claim 1, wherein the treatment of chlorine gas by the buffer tank and the chlorine gas distribution table in step 1 is as follows:

step 1-1: the electrolyzed chlorine enters a buffer tank after being cooled by 12-15 ℃;

step 1-2: absorbing moisture in the chlorine by sulfuric acid at the temperature of 11-16 ℃, and then passing through a drying agent and an acid mist remover to obtain dry chlorine;

step 1-3: at the moment, the temperature of the chlorine is strictly controlled below 20 ℃, the pressure is 0.05-0.15 MPa, other gases are mixed in the dry chlorine, and the dry chlorine is uniformly mixed with tail chlorine after entering a chlorine distribution table, so that the liquefaction rate of the chlorine can be greatly improved, the writing preparation efficiency is greatly improved, and the cost is indirectly greatly reduced.

3. The process flow for preparing liquid chlorine at low temperature and low pressure according to claim 1, wherein the treatment of the chlorine gas to be liquefied by the liquefier in the step 2 is as follows:

step 2-1: the mixed chlorine enters a liquefier, and the liquefier is filled with R22 liquid;

step 2-2: the liquid R22 is converted into the gas R22 through heat absorption, so that the temperature of the liquefier is kept between-10 ℃ and-25 ℃, the separated gas R22 enters a condenser through a pipeline to be condensed into liquid R22 again, and enters the liquefier again through a high-pressure pump, and a pressure gauge and a temperature gauge are installed in the liquefier, so that the temperature and the pressure in the liquefier are clear at a glance;

step 2-3: mixed chlorine also carries out the heat exchange at R22 liquid in the heat exchange tube to make most chlorine condense into liquid chlorine, because R22 works in a confined environment, make R22 can recycle, thereby great reduction the waste of material, saved the cost, and this mode green.

4. The process flow for preparing liquid chlorine at low temperature and low pressure according to claim 1, which is characterized in that: the material of the liquid chlorine storage tank is steel, liquid chlorine in a gas-liquid separator at the bottom of the liquefier flows into the liquid chlorine storage tank, tail chlorine enters the chlorine gas distribution table, the temperature inside the liquid chlorine storage tank is kept between-10 ℃ and-25 ℃, the purity of the liquid chlorine inside the liquid chlorine storage tank is more than 99.6 percent, the water content is less than 400ppm, and the liquid chlorine is sent to a filling distribution table by a magnetic pump to be filled into a steel cylinder qualified by inspection.

5. The process flow for preparing liquid chlorine at low temperature and low pressure according to claim 1, wherein the treatment of the tail chlorine by the tail chlorine distributing table in the step 3 is as follows:

step 3-1: the tail chlorine entering the tail chlorine distribution table enters the chlorine distribution table through a pipeline to be mixed with dry chlorine, so that the tail chlorine is liquefied again;

step 3-2: putting a small amount of chlorine and a large amount of other tail gas into a hydrochloric acid synthesis furnace to react with electrolytic hydrogen to form hydrochloric acid;

step 3-3: or the tail gas is introduced into a tail gas absorption tower to be absorbed and discharged after reaching the standard, so that the tail chlorine can be fully used, and the use methods are various.

6. The process flow for preparing liquid chlorine at low temperature and low pressure according to claim 1, wherein the chlorine absorption tower in the step 4 is used for treating chlorine as follows:

step 4-1: an alkali liquor storage tank, a packing layer, a detection device, a spraying device and a circulating device are arranged in the chlorine absorption tower, and after the tail gas enters the chlorine absorption tower, the alkali liquor is sprayed out through the spraying device;

step 4-2: so that the contact area of the chlorine and the alkali liquor is increased, the time for the chlorine to chemically react with the alkali liquor is shorter, and the chlorine is absorbed more thoroughly;

step 4-3: then the alkali liquor can be continuously conveyed into the spraying device far away through the circulating device, and after the detection device detects that the chlorine is completely absorbed and reaches the standard;

step 4-4: can be with in tail gas discharge air for chlorine in the tail gas can be absorbed completely, green, great reduction polluted environment's probability.

Technical Field

The invention relates to the technical field of liquid chlorine preparation, in particular to a process flow for preparing liquid chlorine at low temperature and low pressure.

Background

The chemical name of liquid chlorine is liquid chlorine, which is yellow green liquid, the boiling point is-34.6 ℃, the melting point is-103 ℃, the liquid chlorine is vaporized into gas under normal pressure, the liquid chlorine can be seriously poisoned when inhaled into human bodies, has violent stimulation and corrosivity, can be combusted and exploded when mixed with other inflammable gases under sunlight, and the chlorine is very active substance and can react with most elements (or compounds). The specific gravity at 15 ℃ is 1.4256, the boiling point is-34.6 ℃ and the freezing point is-101.5 ℃ under the standard condition. In thatIt is strongly corrosive to steel in the presence of moisture. Liquid chlorine is a basic chemical raw material, can be used in industries such as metallurgy, textile, papermaking and the like, and is a raw material for synthesizing hydrochloric acid, polyvinyl chloride, plastics and pesticides. Packaging with high pressure steel cylinder, net weight 500kg, 1000 kg; the tank car can be filled, and the net weight is about 25 tons per tank. Storing in a cool, dry and ventilated place, and preventing fire, sun and heat, chlorine gas with chemical formula of Cl₂. The product is yellow green at normal temperature and pressure, has strong irritant odor, strong toxic gas, suffocating property, density greater than air, and is soluble in water and alkali solution, and easily soluble in organic solvent (such as carbon disulfide and carbon tetrachloride).

However, the liquefaction rate of chlorine gas in the existing process flow for preparing liquid chlorine at low temperature and low pressure in the market is not high, and raw materials are greatly wasted.

Disclosure of Invention

The invention aims to provide a process flow for preparing liquid chlorine at low temperature and low pressure, and aims to solve the problems that the liquefaction rate of chlorine in the existing process flow for preparing liquid chlorine at low temperature and low pressure in the market is not high, raw materials are greatly wasted and the like in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a process flow for preparing liquid chlorine at low temperature and low pressure comprises the following steps:

step 1: chlorine from electrolysis enters a buffer tank, acid foam, impurities and moisture in the chlorine are further removed from a chlorine tank, and dry chlorine enters a chlorine distribution table to be mixed with tail chlorine and then enters a liquefier;

step 2: when the mixed chlorine gas passes through the heat exchange tube in the liquefier, most of the mixed chlorine gas is condensed into liquid chlorine by the heat absorption principle of liquid and gas conversion of R22, the liquid chlorine and tail chlorine are separated in the gas-liquid separator, the liquid chlorine flows into the liquid chlorine storage tank, and the tail chlorine enters the tail chlorine distribution table;

and step 3: after the liquid chlorine enters the liquid chlorine storage tank, the liquid chlorine enters a distribution table through a magnetic pump and is filled into a steel cylinder qualified by inspection;

and 4, step 4: and after the tail chlorine is arranged on the tail chlorine distribution platform, the chlorine which is not liquefied enters the chlorine distribution platform through a pipeline to be re-mixed with the dry chlorine, then the chlorine enters the liquefier to be liquefied, and the tail chlorine is put into the hydrochloric acid synthetic furnace to be subjected to the next step of work, or the tail chlorine is introduced into a tail gas absorption tower.

Preferably, the treatment of the chlorine gas by the buffer tank and the chlorine gas distribution table in the step 1 is as follows:

step 1-1: the electrolyzed chlorine enters a buffer tank after being cooled by 12-15 ℃;

step 1-2: absorbing moisture in the chlorine by sulfuric acid at the temperature of 11-16 ℃, and then passing through a drying agent and an acid mist remover to obtain dry chlorine;

step 1-3: at the moment, the temperature of the chlorine is strictly controlled below 20 ℃, the pressure is 0.05-0.15 MPa, other gases are mixed in the dry chlorine, and the dry chlorine enters the chlorine distribution table and is uniformly mixed with the tail chlorine, so that the liquefaction rate of the chlorine can be greatly improved, the writing preparation efficiency is greatly improved, and the cost is indirectly greatly reduced.

Preferably, the treatment of the deliquified chlorine gas by the liquefier in the step 2 is specifically as follows:

step 2-1: the mixed chlorine enters a liquefier, and the liquefier is filled with R22 liquid;

step 2-2: the liquid R22 is converted into the gas R22 through heat absorption, so that the temperature of the liquefier is kept between-10 ℃ and-25 ℃, the separated gas R22 enters a condenser through a pipeline to be condensed into liquid R22 again, and enters the liquefier again through a high-pressure pump, and a pressure gauge and a temperature gauge are installed in the liquefier, so that the temperature and the pressure in the liquefier are clear at a glance;

step 2-3: mixed chlorine also carries out the heat exchange at R22 liquid in the heat exchange tube to make most chlorine condense into liquid chlorine, because R22 works in a confined environment, make R22 can recycle, thereby great reduction the waste of material, saved the cost, and this mode green.

Preferably, the material of the liquid chlorine storage tank is steel, liquid chlorine in a gas-liquid separator at the bottom of the liquefier flows into the liquid chlorine storage tank, tail chlorine enters the chlorine gas distribution table, the temperature inside the liquid chlorine storage tank is kept between-10 and-25 ℃, the purity of the liquid chlorine inside the liquid chlorine storage tank is more than 99.6 percent, the water content is less than 400ppm, and the liquid chlorine is conveyed to the filling distribution table by a magnetic pump to be filled into steel cylinders qualified in inspection.

Preferably, the treatment of the tail chlorine by the tail chlorine distribution table in the step 3 is specifically as follows:

step 3-1: the tail chlorine entering the tail chlorine distribution table enters the chlorine distribution table through a pipeline to be mixed with dry chlorine, so that the tail chlorine is liquefied again;

step 3-2: putting a small amount of chlorine and a large amount of other tail gas into a hydrochloric acid synthesis furnace to react with electrolytic hydrogen to form hydrochloric acid;

step 3-3: or the tail gas is introduced into a tail gas absorption tower to be absorbed and discharged after reaching the standard, so that the tail chlorine can be fully used, and the use methods are various.

Preferably, the chlorine absorption tower in the step 4 treats the chlorine as follows:

step 4-1: an alkali liquor storage tank, a packing layer, a detection device, a spraying device and a circulating device are arranged in the chlorine absorption tower, and after the tail gas enters the chlorine absorption tower, the alkali liquor is sprayed out through the spraying device;

step 4-2: so that the contact area of the chlorine and the alkali liquor is increased, the time for the chlorine to chemically react with the alkali liquor is shorter, and the chlorine is absorbed more thoroughly;

step 4-3: then the alkali liquor can be continuously conveyed into the spraying device far away through the circulating device, and after the detection device detects that the chlorine is completely absorbed and reaches the standard;

step 4-4: can be with in tail gas discharge air for chlorine in the tail gas can be absorbed completely, green, great reduction polluted environment's probability.

Compared with the prior art, the invention has the beneficial effects that:

the invention greatly improves the efficiency of the process flow for preparing the liquid chlorine by arranging a series of structures and has high preparation rate.

Drawings

FIG. 1 is a flow chart of the structure of the present invention;

fig. 2 is a flow chart of the operation of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-2, an embodiment of the present invention is shown: a process flow for preparing liquid chlorine at low temperature and low pressure comprises the following steps:

step 1: chlorine from electrolysis enters a buffer tank, acid foam, impurities and moisture in the chlorine are further removed from a chlorine tank, and dry chlorine enters a chlorine distribution table to be mixed with tail chlorine and then enters a liquefier;

step 2: when the mixed chlorine gas passes through the heat exchange tube in the liquefier, most of the mixed chlorine gas is condensed into liquid chlorine by the heat absorption principle of liquid and gas conversion of R22, the liquid chlorine and tail chlorine are separated in the gas-liquid separator, the liquid chlorine flows into the liquid chlorine storage tank, and the tail chlorine enters the tail chlorine distribution table;

and step 3: after the liquid chlorine enters the liquid chlorine storage tank, the liquid chlorine enters a distribution table through a magnetic pump and is filled into a steel cylinder qualified by inspection;

and 4, step 4: and after the tail chlorine is arranged on the tail chlorine distribution platform, the chlorine which is not liquefied enters the chlorine distribution platform through a pipeline to be re-mixed with the dry chlorine, then the chlorine enters the liquefier to be liquefied, and the tail chlorine is put into the hydrochloric acid synthetic furnace to be subjected to the next step of work, or the tail chlorine is introduced into a tail gas absorption tower.

Further, the treatment of the buffer tank and the chlorine gas distribution table on the chlorine gas in the step 1 is specifically as follows:

step 1-1: the electrolyzed chlorine enters a buffer tank after being cooled by 12-15 ℃;

step 1-2: absorbing moisture in the chlorine by sulfuric acid at the temperature of 11-16 ℃, and then passing through a drying agent and an acid mist remover to obtain dry chlorine;

step 1-3: at the moment, the temperature of the chlorine is strictly controlled below 20 ℃, the pressure is 0.05-0.15 MPa, other gases are mixed in the dry chlorine, and the dry chlorine enters the chlorine distribution table and is uniformly mixed with the tail chlorine, so that the liquefaction rate of the chlorine can be greatly improved, the writing preparation efficiency is greatly improved, and the cost is indirectly greatly reduced.

Further, the treatment of the deliquified chlorine gas by the liquefier in step 2 is specifically as follows:

step 2-1: the mixed chlorine enters a liquefier, and the liquefier is filled with R22 liquid;

step 2-2: the liquid R22 is converted into the gas R22 through heat absorption, so that the temperature of the liquefier is kept between-10 ℃ and-25 ℃, the separated gas R22 enters a condenser through a pipeline to be condensed into liquid R22 again, and enters the liquefier again through a high-pressure pump, and a pressure gauge and a temperature gauge are installed in the liquefier, so that the temperature and the pressure in the liquefier are clear at a glance;

step 2-3: mixed chlorine also carries out the heat exchange at R22 liquid in the heat exchange tube to make most chlorine condense into liquid chlorine, because R22 works in a confined environment, make R22 can recycle, thereby great reduction the waste of material, saved the cost, and this mode green.

Further, the material of the liquid chlorine storage tank is steel, liquid chlorine in a gas-liquid separator at the bottom of the liquefier flows into the liquid chlorine storage tank, tail chlorine enters the chlorine gas distribution table, the temperature inside the liquid chlorine storage tank is kept between-10 and-25 ℃, the purity of the liquid chlorine inside the liquid chlorine storage tank is more than 99.6 percent, the water content is less than 400ppm, and the liquid chlorine is sent to a filling distribution table by a magnetic pump to be filled into a steel cylinder qualified in inspection. .

Further, the treatment of the tail chlorine by the tail chlorine distribution table in the step 3 is specifically as follows:

step 3-1: the tail chlorine entering the tail chlorine distribution table enters the chlorine distribution table through a pipeline to be mixed with dry chlorine, so that the tail chlorine is liquefied again;

step 3-2: putting a small amount of chlorine and a large amount of other tail gas into a hydrochloric acid synthesis furnace to react with electrolytic hydrogen to form hydrochloric acid;

step 3-3: or the tail gas is introduced into a tail gas absorption tower to be absorbed and discharged after reaching the standard, so that the tail chlorine can be fully used, and the use methods are various.

Further, the treatment of the chlorine gas by the chlorine gas absorption tower in the step 4 is specifically as follows:

step 4-1: an alkali liquor storage tank, a packing layer, a detection device, a spraying device and a circulating device are arranged in the chlorine absorption tower, and after the tail gas enters the chlorine absorption tower, the alkali liquor is sprayed out through the spraying device;

step 4-2: so that the contact area of the chlorine and the alkali liquor is increased, the time for the chlorine to chemically react with the alkali liquor is shorter, and the chlorine is absorbed more thoroughly;

step 4-3: then the alkali liquor can be continuously conveyed into the spraying device far away through the circulating device, and after the detection device detects that the chlorine is completely absorbed and reaches the standard;

step 4-4: can be with in tail gas discharge air for chlorine in the tail gas can be absorbed completely, green, great reduction polluted environment's probability.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.