Vinyl chloride synthesis gas drying device

Abstract

The utility model provides a vinyl chloride synthetic gas drying device which comprises a first-stage drying module and a second-stage drying module, the first-stage drying module is used for drying gas, the gas inlet end of the second-stage drying module is connected with the gas outlet end of the first-stage drying module through a pipeline, and the gas inlet end of the second-stage drying module is connected with the gas outlet end of the second-stage drying module through a pipeline. The second-stage drying module is filled with a drying substance which changes color when encountering water and can dry air and detect whether the air is dry or not; the second-stage drying module is additionally arranged at the rear end of the first-stage drying module, the second-stage drying module is filled with the drying matter which changes color when encountering water, and when the first-stage drying module cannot dry gas completely due to the fact that the efficiency of the drying matter in the first-stage drying module is reduced, the second-stage drying module can adsorb residual water in the gas, and therefore the drying efficiency of the gas is improved. When the first-stage drying module fails, the first-stage drying module changes color to prompt that the drying capacity of the drying substance in the first-stage drying module is reduced and the drying substance needs to be replaced, so that the problem that whether the first-stage drying module fails or not cannot be confirmed in time in the prior art can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vinyl chloride manufacturing equipment technical field especially relates to a vinyl chloride synthesis gas drying device. BACKGROUND

[0002] Vinyl chloride is the monomer of synthetic polyvinyl chloride, and polyvinyl chloride is one of the resins with the largest output in the world, has good mechanical strength, stable chemical properties, and easy processing and other excellent properties, and is widely used in industry, agriculture, building materials and daily necessities. Vinyl chloride is generally prepared by acetylene method, in order to make the preparation effect of vinyl chloride better, hydrogen chloride gas and acetylene gas need to be dried to ensure the reaction.

[0003] For example, the patent application file CN212492290U provides an acetylene method vinyl chloride raw material gas drying system, relating to the acetylene method vinyl chloride process technical field;The drying system includes the acetylene cleaning tower connected with the acetyylene inlet pipeline and the first sulfuric acid liquid inlet pipeline, the hydrogen chloride drying tower connected with the hydrogen chloride inlet pipeline and the second sulfuric acid liquid inlet pipeline and the mixer, so that the sulfur and phosphorus in the acetylene are cleaned by sulfuric acid in the acetylene cleaning tower, and the water in the acetylene is removed, and the water in the hydrogen chloride is removed by sulfuric acid in the hydrogen chloride drying tower, the mixer is connected with the acetylene outlet pipeline and the hydrogen chloride outlet pipeline, so that the dried acetylene and hydrogen chloride are mixed in the mixer, by implementing the technical scheme, the technical problem that the existing freezing dehydration process cannot meet the dehydration process requirement can be effectively solved, the acetylene and HCL are dried and dehydrated respectively before mixing, the water content of the mixed gas is below 20ppm, which is much lower than the existing freezing dehydration process, and the acetylene method raw material gas dehydration process requirement is effectively met.

[0004] The above scheme has the following problems: the drying capacity of the drying material in the drying tower will gradually decrease, and the existing method is to detect the water content of the gas at the exhaust end of the drying tower periodically, which cannot confirm whether the drying material is invalid in time. UTILITY MODEL CONTENT

[0005] Therefore, it is necessary to provide a vinyl chloride synthesis gas drying device that can solve the problem of confirming whether the drying material is invalid in time in the prior art.

[0006] The utility model provides a vinyl chloride synthesis gas drying device, which comprises:

[0007] A first drying module for drying gas;And

[0008] A second drying module, the gas inlet end of the second drying module is connected with the gas outlet end pipeline of the first drying module, and the second drying module is filled with water-color-changing drying material.

[0009] In some possible solutions, the number of the primary drying modules and the secondary drying modules is two, and the two primary drying modules are connected to the two secondary drying modules one by one.

[0010] In some possible solutions, the primary drying module comprises a plurality of primary dryers, an air inlet pipeline and an air outlet pipeline, the air inlet pipeline is connected to the air inlet ends of the primary dryers, and the air outlet pipeline is connected to the air outlet ends of the primary dryers and the secondary drying module.

[0011] In some possible solutions, the air inlet pipeline comprises an air inlet main pipeline and air inlet branch pipelines, the air inlet branch pipelines are arranged one by one in the primary dryers, one end of each air inlet branch pipeline is connected to the air inlet end of the primary dryer, and the other end of each air inlet branch pipeline is connected to the air inlet main pipeline, and each air inlet branch pipeline is provided with an air inlet valve for controlling the conduction or cutoff of the air inlet branch pipeline.

[0012] In some possible solutions, the air outlet pipeline comprises an air outlet main pipeline and air outlet branch pipelines, the air outlet branch pipelines are arranged one by one in the primary dryers, one end of each air outlet branch pipeline is connected to the air outlet end of the primary dryer, and the other end of each air outlet branch pipeline is connected to the air outlet main pipeline, and each air outlet branch pipeline is provided with an air outlet valve for controlling the conduction or cutoff of the air outlet branch pipeline.

[0013] In some possible solutions, the primary dryer comprises a primary upper cover, a primary tank body and a primary lower cover, one end of the primary upper cover is detachably connected to the primary tank body, and the other end of the primary lower cover is detachably connected to the primary tank body, and the primary tank body is filled with a drying substance.

[0014] In some possible solutions, the primary upper cover comprises a cover body and a wind distribution plate, the wind distribution plate is fixed to the inner wall of the cover body and forms an abutting surface abutting against the primary tank body.

[0015] In some possible solutions, the secondary drying module comprises a secondary upper cover, a secondary tank body and a secondary lower cover, one end of the secondary upper cover is detachably connected to the secondary tank body, and the other end of the secondary lower cover is detachably connected to the secondary tank body, the secondary tank body is filled with a drying substance that changes color when meeting water, and the surface of the secondary tank body is provided with an observation window for observing the color of the drying substance in the secondary tank body.

[0016] In some possible solutions, the drying substance filled in the secondary tank body is color-changing silica gel.

[0017] In some possible solutions, the drying substance in the primary tank body is one of a molecular sieve drying agent and aluminum oxide.

[0018] The utility model discloses a beneficial effect is:

[0019] The utility model discloses a first drying module and secondary drying module, the first drying module is used to dry gas, the air inlet end of secondary drying module is with the air outlet end pipeline connection of the first drying module, the secondary drying module is filled with the drying material that meets water and changes colour, can dry air and check whether air is dry, the utility model discloses a first drying module's rear end increases a secondary drying module, the secondary drying module is filled with the drying material that meets water and changes colour, when the first drying module because internal drying material efficiency reduces, cannot dry gas completely, the secondary drying module can adsorb the water remaining in gas, and produce the discoloration, with to prompt the drying capacity reduction of the drying material in the first drying module, needs to change, can effectively solve the problem that whether the first drying module fails in prior art cannot be confirmed in time. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will be needed to use the drawings in the embodiment description briefly introduces, obviously, the following description in the drawings is only some embodiments of the utility model, for those skilled in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0021] Figure 1 It is the structural diagram of the vinyl chloride synthesis gas drying device in the utility model;

[0022] Wherein: 1-first drying module, 11-first dryer, 111-first upper cover, 112-first tank body, 113-first lower cover, 12-air inlet pipeline, 121-air inlet main pipeline, 122-air inlet branch pipeline, 123-air inlet valve, 13-air outlet pipeline, 131-air outlet main pipeline, 132-air outlet branch pipeline, 133-air outlet valve, 2-secondary drying module, 21-secondary upper cover, 22-secondary tank body, 23-secondary lower cover. DETAILED DESCRIPTION

[0023] The preferred embodiments of the utility model will be described in detail below in conjunction with the drawings, wherein the drawings constitute a part of the present application, and are used together with the embodiments of the utility model to explain the principles of the utility model, and are not used to limit the scope of the utility model.

[0024] As Figure 1The utility model discloses an embodiment provides a vinyl chloride synthesis gas drying device, it includes: primary drying module 1 and secondary drying module 2, primary drying module 1 is used to dry gas, the air inlet end of secondary drying module 2 is connected with the air outlet pipeline of primary drying module 1, the secondary drying module 2 is filled with the drying material that meets water discoloration, can dry air and check whether air is dry.

[0025] In the utility model, increase one secondary drying module 2 at the rear end of primary drying module 1, the secondary drying module 2 is filled with the drying material that meets water discoloration, when primary drying module 1 because internal drying material efficiency reduces, cannot dry gas completely, secondary drying module 2 can adsorb the water remaining in gas, and produce discoloration, to prompt the drying ability of drying material in primary drying module 1 to decline, needs to be replaced.

[0026] Specifically, in the embodiment, including two primary drying module 1 and two secondary drying module 2, two secondary drying module 2 are connected with two primary drying module 1 respectively. When using, hydrogen chloride gas and acetylene gas are guided to two primary drying module 1 respectively, dry, and hydrogen chloride gas and acetylene gas after drying are guided to two secondary drying module 2 respectively, if hydrogen chloride gas or acetylene gas still mixes with moisture, corresponding secondary drying module 2 will discolor, and prompt.

[0027] Specifically, primary drying module 1 includes a plurality of primary dryer 11, air inlet pipeline 12 and air outlet pipeline 13, air inlet pipeline 12 is connected with the air inlet end of a plurality of primary dryer 11, and air outlet pipeline 13 is connected with the air outlet end of a plurality of primary dryer 11. In the utility model, a plurality of primary dryer 11 are connected in parallel, can enhance the ability of primary drying module 1 dry gas in unit time, effectively improve the efficiency of dry gas.

[0028] Further, the air inlet pipeline 12 includes air inlet main pipeline 121 and air inlet branch pipeline 122, the air inlet branch pipeline 122 is set up one by one with primary dryer 11, one end of air inlet branch pipeline 122 is connected with the air inlet end of primary dryer 11, the other end is connected with air inlet main pipeline 121, and air inlet branch pipeline 122 is equipped with air inlet valve 123 that controls the conduction or cut-off of air inlet branch pipeline 122.

[0029] Further, the air outlet pipeline 13 comprises an air outlet main pipeline 131 and air outlet branch pipelines 132, the air outlet branch pipelines 132 are arranged in one-to-one correspondence with the primary dryers 11, one end of the air outlet branch pipelines 132 is connected with the air outlet end of the primary dryers 11, the other end is connected with the air outlet main pipeline 131, and the air outlet branch pipelines 132 are provided with air outlet valves 133 for controlling the conduction or cutoff of the air outlet branch pipelines 132.

[0030] In use, the lossless replacement of the drying substance can be realized by controlling the air inlet valves 123 and the air outlet valves 133. For example, only part of the air inlet valves 123 and the air outlet valves 133 are opened in use, so that the gas only passes through part of the primary dryers 11, when the secondary drying module 2 located in the primary drying module 1 is discolored, the currently opened air inlet valves 123 and the air outlet valves 133 are closed, and the air inlet valves 123 and the air outlet valves 133 in the closed state before are opened. The switching of the primary dryers 11 is realized. At this time, the primary dryers 11 with lower efficiency can be removed, and the drying substance inside can be replaced.

[0031] Further, the primary dryers 11 comprise a primary upper cover 111, a primary tank body 112 and a primary lower cover 113, the primary upper cover 111 is detachably connected with one end of the primary tank body 112, the primary lower cover 113 is detachably connected with the other end of the primary tank body 112, and the primary tank body 112 is filled with a drying substance.

[0032] Further, the primary upper cover 111 comprises a cover body and a wind distribution plate, the wind distribution plate is fixed on the inner wall of the cover body and forms an abutting surface abutting against the primary tank body 112. The wind distribution plate can uniformly distribute the gas flowing through it, so that the gas can enter the primary tank body 112 at a uniform speed, improving the drying effect of the gas. In addition, the wind distribution plate can also support the drying substance in the primary tank body 112.

[0033] In this embodiment, the drying substance in the primary tank body 12 is one of a molecular sieve desiccant or aluminum oxide, and the drying effect of the molecular sieve desiccant and the aluminum oxide is good.

[0034] Specifically, the secondary drying module 2 comprises a secondary upper cover 21, a secondary tank body 22 and a secondary lower cover 23, the secondary upper cover 21 is detachably connected with one end of the secondary tank body 22, the secondary lower cover 23 is detachably connected with the other end of the secondary tank body 22, the secondary tank body 22 is filled with a drying substance that changes color when encountering water, and the surface of the secondary tank body 22 is provided with an observation window for observing the color of the drying substance in the secondary tank body 22.

[0035] In the embodiment, the substance filled in the secondary tank body 22 is color-changing silica gel. The main component of the color-changing silica gel is cobalt chloride which has strong toxicity and has very strong adsorption effect on water vapor in the air, and can display different colors by changing the amount of water of crystallization of the contained cobalt chloride, i.e. gradually changing from blue before absorbing moisture to light red with the increase of the amount of absorbed moisture. The user can observe the color of the color-changing silica gel inside through the observation window on the surface of the secondary tank body 22, and once the color-changing silica gel changes color, it indicates that the drying efficiency of the primary drying module 1 is reduced and needs to be replaced.

[0036] The use flow is as follows: only the air inlet valve 123 and the air outlet valve 133 are opened during use, so that the gas only passes through part of the primary dryer 11; when the secondary drying module 2 located in the primary drying module 1 changes color, the currently opened air inlet valve 123 and air outlet valve 133 are closed, and the air inlet valve 123 and air outlet valve 133 in the closed state before are opened. The switching of the primary dryer 11 is realized. At this time, the primary dryer 11 with lower efficiency can be removed, and the drying substance inside is replaced.

[0037] The utility model discloses beneficial effect is:

[0038] The utility model discloses a primary drying module and secondary drying module, the primary drying module is used to dry gas, the air inlet of secondary drying module is with the air outlet pipeline connection of primary drying module, the secondary drying module fills in the drying substance that meets water color change, can dry air and check whether air is dry, the utility model discloses increase a secondary drying module in the rear end of primary drying module, the secondary drying module fills in the drying substance that meets water color change, when the primary drying module because internal drying substance efficiency reduces, cannot dry gas completely, the secondary drying module can adsorb the water remaining in gas, and produce color change, with prompting the drying ability of drying substance in the primary drying module reduces, needs to carry out replacement, can effectively solve the problem that whether primary drying module fails in the prior art cannot be confirmed in time.

[0039] The above, only for the specific implementation mode of the utility model's better, but the protection scope of the utility model does not limit to this, any skilled person in the technical field of the utility model disclosed in the technical range, can easily think of the change or replacement, all should cover in the protection scope of the utility model.

Claims

1. A vinyl chloride synthesis gas drying device characterized by comprising: The application relates to a drying device for a gas pipeline, which comprises: a primary drying module for drying the gas; and a secondary drying module, the gas inlet end of which is connected with the gas outlet end of the primary drying module, and the secondary drying module is filled with water-color-changing drying material.

2. The vinyl chloride synthesis gas drying device according to claim 1, characterized by The number of the primary drying module and the secondary drying module is two, and the two primary drying modules and the two secondary drying modules are connected one by one.

3. The vinyl chloride synthesis gas drying device as claimed in claim 1, wherein The primary drying module comprises a plurality of primary dryers, a gas inlet pipeline and a gas outlet pipeline, the gas inlet pipeline is connected with the gas inlet ends of the primary dryers, one end of the gas outlet pipeline is connected with the gas outlet ends of the primary dryers, and the other end is connected with the secondary drying module.

4. The vinyl chloride synthesis gas drying device as claimed in claim 3, wherein The gas inlet pipeline comprises a gas inlet main pipeline and gas inlet branch pipelines, the gas inlet branch pipelines are arranged one by one with the primary dryers, one end of the gas inlet branch pipelines is connected with the gas inlet ends of the primary dryers, and the other end is connected with the gas inlet main pipeline, and the gas inlet branch pipelines are provided with gas inlet valves for controlling the gas inlet branch pipelines to be conducted or cut off.

5. The vinyl chloride synthesis gas drying apparatus as claimed in claim 3, wherein The gas outlet pipeline comprises a gas outlet main pipeline and gas outlet branch pipelines, the gas outlet branch pipelines are arranged one by one with the primary dryers, one end of the gas outlet branch pipelines is connected with the gas outlet ends of the primary dryers, and the other end is connected with the gas outlet main pipeline, and the gas outlet branch pipelines are provided with gas outlet valves for controlling the gas outlet branch pipelines to be conducted or cut off.

6. The vinyl chloride synthesis gas drying device as claimed in claim 3, wherein The primary dryer comprises a primary upper cover, a primary tank body and a primary lower cover, one end of the primary upper cover is detachably connected with the primary tank body, and the other end of the primary lower cover is detachably connected with the primary tank body, and the primary tank body is filled with drying material.

7. The vinyl chloride synthesis gas drying device as claimed in claim 6, wherein The primary upper cover comprises a cover body and a wind distribution plate, the wind distribution plate is fixed on the inner wall of the cover body and forms an abutting surface abutting against the primary tank body.

8. The vinyl chloride synthesis gas drying device as claimed in claim 1, wherein The secondary drying module comprises a secondary upper cover, a secondary tank body and a secondary lower cover, one end of the secondary upper cover is detachably connected with the secondary tank body, and the other end of the secondary lower cover is detachably connected with the secondary tank body, the secondary tank body is filled with water-color-changing drying material, and the surface of the secondary tank body is provided with an observation window for observing the color of the drying material in the secondary tank body.

9. The vinyl chloride synthesis gas drying device as claimed in claim 8, wherein The material filled in the secondary tank body is color-changing silica gel.

10. The vinyl chloride synthesis gas drying apparatus as claimed in claim 6, wherein The drying material in the primary tank body is one of a molecular sieve drying agent and alumina.

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