Carbon dioxide production device convenient for non-condensable gas recovery

Abstract

The utility model provides a carbon dioxide production device convenient for non-condensable gas recovery, which relates to the technical field of carbon dioxide production, and comprises a rack, an adsorption tower is arranged on the rack, a plurality of adsorption beds are arranged in the adsorption tower, and the adsorption beds are arranged on the rack. The adsorption bed is used for absorbing carbon dioxide gas, the adsorption tower is provided with a regeneration assembly, the regeneration assembly is used for separating the carbon dioxide gas absorbed by the adsorption bed, the top of the adsorption tower is connected with a three-way pipe through a pipeline, and one connector of the three-way pipe is connected with an exhaust pipeline; by arranging the adsorption tower, the adsorption bed, the regeneration assembly, the membrane separator, the cryogenic box and the drying separation assembly, not only can carbon dioxide gas be subjected to dehydration, debenzolization and dealkylation treatment, but also non-condensable gas such as methane and helium can be subjected to three-time treatment operation, so that the purification degree of carbon dioxide is relatively good, and the energy consumption is reduced. Therefore, the quality of the produced carbon dioxide is relatively good.

Description

TECHNICAL FIELD

[0001] The utility model relates to carbon dioxide production technical field, specifically a kind of carbon dioxide production device of non-condensable gas recovery convenient. BACKGROUND

[0002] Carbon dioxide is mainly applied to food refrigeration, fire extinguishing, manufacturing carbonated beverages and industrial raw materials, etc., and is usually prepared by calcining limestone or high-temperature calcining calcium carbonate in industry, but there are a large amount of impurities in the non-condensable gas during the preparation of carbon dioxide, which needs to be filtered and purified.

[0003] In the patent file with publication number CN222400290U, a carbon dioxide production device for convenient recovery of non-condensable gas is disclosed. During use, the non-condensable gas passes through the dehydration layer, benzene removal layer and hydrocarbon removal layer, and is sequentially subjected to dehydration, benzene removal and hydrocarbon removal treatment, so that the benzene and hydrocarbon components in the non-condensable gas are removed.

[0004] Although the above technical solution can purify carbon dioxide, the non-condensable gas contains a variety of gases during the production of carbon dioxide, including benzene and hydrocarbons, as well as methane, helium, oxygen, etc., which makes the above technical solution incomplete in purifying carbon dioxide, affecting the purity of subsequent production of carbon dioxide, so a carbon dioxide production device for convenient recovery of non-condensable gas is needed to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a carbon dioxide production device for convenient recovery of non-condensable gas, to solve the problems in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a carbon dioxide production device for convenient recovery of non-condensable gas in one aspect of embodiment, which comprises:

[0007] Rack:

[0008] Adsorption tower, installed on the rack, the inside of the adsorption tower is provided with a plurality of adsorption beds, a plurality of the adsorption beds are arranged along the height direction of the adsorption tower, the top of the adsorption tower is connected with a tee pipe through a pipeline, one connecting port of the tee pipe is connected with an exhaust pipeline, an electromagnetic valve one is arranged on the exhaust pipeline;

[0009] Regeneration assembly, arranged on the adsorption tower, the regeneration assembly is used for separating the carbon dioxide gas absorbed by the adsorption bed;

[0010] Membrane separator, installed on the rack, the exhaust pipeline is communicated with the membrane separator, the membrane separator is used for separating carbon dioxide gas and non-condensable gas;

[0011] A cryogenic tank connected to the membrane separator by a pipe, the cryogenic tank being used to convert the carbon dioxide gas into carbon dioxide liquid;

[0012] A carbon dioxide collection assembly connected to the cryogenic tank, the carbon dioxide collection assembly being used to collect and store the liquid carbon dioxide;

[0013] A drying separation assembly arranged on the adsorption tower, the drying separation assembly being used to dry and remove the components of benzene and hydrocarbon doped in the carbon dioxide gas;

[0014] A non-condensable gas recovery assembly arranged between the adsorption tower, the membrane separator and the cryogenic tank, the non-condensable gas recovery assembly being used to recover the non-condensable gas.

[0015] Preferably, the regeneration assembly comprises a vacuum pump, an air heater and a heating rod, the vacuum pump is arranged on the adsorption tower and connected to the inside of the adsorption tower by a pipe, the air heater is arranged on the rack and connected to the inside of the adsorption tower by a pipe, and the heating rod is arranged on the adsorption bed.

[0016] Preferably, the non-condensable gas recovery assembly comprises a recovery pipe one, a recovery pipe two, a recovery pipe three, a fan one and a gas storage tank, the recovery pipe one is connected to one of the connection ports of the three-way pipe, the recovery pipe one is provided with a solenoid valve two, the recovery pipe two is connected to the membrane separator, the recovery pipe three is connected to the cryogenic tank, the end of the recovery pipe one, the recovery pipe two and the recovery pipe three is connected to a four-way pipe, one of the connection ports of the four-way pipe is connected to the fan one by a pipe, and the fan one is connected to the gas storage tank by a pipe.

[0017] Preferably, the carbon dioxide collection assembly comprises a delivery pump and a liquid storage tank, the delivery pump is connected to the cryogenic tank by a pipe, and the liquid storage tank is connected to the delivery pump by a pipe.

[0018] Preferably, the drying separation assembly comprises a drying tank, a drying mesh cylinder, a benzene removal layer and a hydrocarbon removal layer, the drying tank is connected to the adsorption tower by a pipe, the drying mesh cylinder, the benzene removal layer and the hydrocarbon removal layer are arranged in the inside of the drying tank in sequence, and the inside of the drying mesh cylinder is provided with a drying agent.

[0019] Preferably, the adsorption tower is provided with a temperature sensor and a pressure sensor, the rack is provided with a controller, the temperature sensor and the pressure sensor are electrically connected to the controller, the controller is electrically connected to the heating rod, and the controller is electrically connected to the vacuum pump.

[0020] Preferably, the end of the drying mesh cylinder is connected to a fan two by a pipe, and the air inlet of the fan two is connected to an air inlet pipe.

[0021] Compared with the prior art, the present application has the beneficial effects that:

[0022] 1. By setting the adsorption tower, adsorption bed, regeneration assembly, membrane separator, cryogenic tank and drying separation assembly, not only the carbon dioxide gas can be dehydrated, benzene and hydrocarbon removed, but also the non-condensable gas such as methane and helium is treated three times, so that the purification degree of carbon dioxide is better, and the quality of the produced carbon dioxide is ensured.

[0023] 2. By setting the non-condensable gas recovery assembly, the separated non-condensable gas in the production of carbon dioxide can be automatically recovered and stored, and the non-condensable gas can be used later. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structural schematic view of the present application;

[0025] Figure 2 It is a top view structural schematic view of the present application;

[0026] Figure 3 It is a front view structural schematic view of the present application;

[0027] Figure 4 It is a sectional view structural schematic view of the adsorption tower of the present application;

[0028] Figure 5 It is a sectional view structural schematic view of the drying tank of the present application.

[0029] In the figure: 10, rack; 20, adsorption tower; 21, adsorption bed; 22, exhaust pipeline; 23, electromagnetic valve one; 24, vacuum pump; 25, air heater; 26, heating rod; 27, temperature sensor; 28, pressure sensor; 30, membrane separator; 40, cryogenic tank; 41, delivery pump; 42, liquid storage tank; 50, drying separation assembly; 51, drying tank; 52, drying mesh cylinder; 53, benzene removal layer; 54, hydrocarbon removal layer; 55, fan two; 56, air inlet pipe; 60, non-condensable gas recovery assembly; 61, recovery pipe one; 611, electromagnetic valve two; 62, recovery pipe two; 63, recovery pipe three; 64, fan one; 65, gas storage tank; 70, controller. DETAILED DESCRIPTION

[0030] The present application will be further described below in combination with the drawings.

[0031] For example, Figures 1 to 5As shown, a carbon dioxide production device facilitating non-condensable gas recovery, comprising a rack 10, an adsorption tower 20 mounted on the rack 10, gas moving upwards in the interior of the adsorption tower 20, a plurality of adsorption beds 21 arranged in the interior of the adsorption tower 20, adsorbents arranged on the adsorption beds 21 being activated carbon, molecular sieve, activated alumina or the like, the adsorption beds 21 being used for absorbing carbon dioxide gas, a regeneration assembly arranged on the adsorption tower 20, the regeneration assembly being used for separating the carbon dioxide gas absorbed by the adsorption beds 21, a tee joint connected to the adsorption tower 20 by a pipeline, one connecting port of the tee joint being connected to an exhaust pipeline 22, the exhaust pipeline 22 being provided with an electromagnetic valve one 23, the electromagnetic valve one 23 being used for controlling the on-off of the exhaust pipeline 22, one end of the exhaust pipeline 22 away from the adsorption tower 20 being connected to a membrane separator 30, the membrane separator 30 being used for separating carbon dioxide gas and non-condensable gas, one connecting port of the membrane separator 30 being connected to a cryogenic tank 40 by a pipeline, the cryogenic tank 40 being used for converting carbon dioxide gas into carbon dioxide liquid, and in the process of converting carbon dioxide gas into carbon dioxide liquid, non-condensable gas cannot be converted into liquid, the cryogenic tank 40 being connected to a carbon dioxide collecting assembly, the carbon dioxide collecting assembly being used for collecting and storing liquid carbon dioxide, the adsorption tower 20 being connected to a drying and separating assembly 50, the drying and separating assembly 50 being used for drying carbon dioxide gas and removing components such as benzene and hydrocarbons doped in the carbon dioxide gas, the adsorption tower 20, the membrane separator 30 and the cryogenic tank 40 being provided with a non-condensable gas recovery assembly 60, the non-condensable gas recovery assembly 60 being used for recovering non-condensable gas.

[0032] In the process of producing carbon dioxide, gas first passes through the drying and separating assembly 50, so that the moisture, benzene and hydrocarbon components in the gas are removed, the dried gas will enter the interior of the adsorption tower 20, and the carbon dioxide is adsorbed by the adsorption beds in the interior of the adsorption tower 20, at this time, the non-condensable gas is recovered by the non-condensable gas recovery assembly 60, when a period of time elapses or the adsorption degree of the adsorption beds 21 is saturated, the carbon dioxide adsorbed by the adsorption beds 21 is reconverted into gas by the regeneration assembly, and in this process, the electromagnetic valve one 23 is opened, the gas enters the interior of the membrane separator 30 through the exhaust pipeline 22, the membranes in the interior of the membrane separator 30 have different permeabilities to carbon dioxide and non-condensable gas, the carbon dioxide permeates the membranes at a faster speed, forming a gas stream rich in carbon dioxide on the permeation side of the membranes, while the non-condensable gas is enriched on the retention side of the membranes, the non-condensable gas retained on the retention side of the membranes is recovered by the non-condensable gas recovery assembly 60, the gas stream rich in carbon dioxide on the permeation side of the membranes is transported to the interior of the cryogenic tank 40 by a pipeline, the temperature of the gas is lowered by the cryogenic tank 40, so that the temperature is lowered below the liquefaction temperature of carbon dioxide, the carbon dioxide condenses into liquid, while the non-condensable gas such as nitrogen and oxygen exists in gaseous form, the carbon dioxide condensed into liquid is collected by the carbon dioxide collecting assembly, and the gaseous non-condensable gas is recovered by the non-condensable gas recovery assembly 60.

[0033] It should be noted that the non-condensable gas recovered by the membrane separator 30, the adsorption tower 20 and the cryogenic tank 40 includes methane, helium and oxygen.

[0034] The regeneration assembly includes a vacuum pump 24 connected to the adsorption tower 20, the vacuum pump 24 is connected to the inside of the adsorption tower 20 through a pipeline, an air heater 25 is installed on the rack 10, the air heater 25 is connected to the inside of the adsorption tower 20 through a pipeline, a heating rod 26 is installed on the adsorption bed 21, the heating rod 26 can be an electric heating rod, and the heating rod 26 is used to directly heat the adsorbent on the adsorption bed 21.

[0035] When it is necessary to separate carbon dioxide from the adsorption bed 21, the inside of the adsorption tower 20 is heated by starting the heating rod 26 and the air heater 25, the adsorption tower 20 and the adsorption bed 21 are warmed to a suitable temperature, and the inside of the adsorption tower 20 is vacuumized by the vacuum pump 24, the inside of the adsorption tower 20 is reduced to a suitable pressure, the regeneration of the adsorbent on the adsorption bed 21 is realized by warming and reducing pressure, and in this process, the adsorption bed 21 releases carbon dioxide, thereby realizing the purpose of carbon dioxide regeneration.

[0036] The non-condensable gas recovery assembly 60 includes a recovery pipe one 61, the recovery pipe one 61 is provided with a solenoid valve two 611, one end of the recovery pipe one 61 away from the adsorption tower 20 is connected with a four-way pipe, one connection port of the four-way pipe is connected with a recovery pipe two 62 connected with the membrane separator 30, one connection port of the four-way pipe is connected with a recovery pipe three 63 connected with the cryogenic tank 40, one connection port of the four-way pipe is connected with a fan one 64 through a pipeline, and the fan one 64 is connected with a gas storage tank 65 through a pipeline.

[0037] The non-condensable gas discharged from the adsorption tower 20 will enter the inside of the recovery pipe one 61, the non-condensable gas separated by the membrane separator 30 enters the inside of the recovery pipe two 62, and the non-condensable gas separated by the cryogenic tank 40 enters the inside of the recovery pipe three 63, the non-condensable gas in the recovery pipe one 61, the recovery pipe two 62 and the recovery pipe three 63 is transported to the inside of the gas storage tank 65 through the four-way pipe and the fan one 64 for storage operation.

[0038] It should be noted that the solenoid valve two 611 is in an open state and the solenoid valve one 23 is in a closed state during the recovery of non-condensable gas in the recovery pipe one 61, so that the non-condensable gas can only enter the inside of the recovery pipe one 61, and the recovery pipe two 62 corresponds to the trapped side position of the membrane inside the membrane separator 30, so that the non-condensable gas trapped by the trapped side of the membrane inside the membrane separator 30 can enter the inside of the recovery pipe two 62, and one-way valves are arranged on the recovery pipe one 61, the recovery pipe two 62 and the recovery pipe three 63, so that the gas can only enter the inside of the four-way pipe through the recovery pipe one 61, the recovery pipe two 62 and the recovery pipe three 63, avoiding the backflow of the gas.

[0039] The carbon dioxide collecting assembly comprises a conveying pump 41, the conveying pump 41 is communicated with the cryogenic tank 40 through a pipeline, the conveying pump 41 is connected with a liquid storage tank 42 through a pipeline, and the liquid storage tank 42 is used for storing carbon dioxide liquid.

[0040] When the non-condensable gas and the liquefied carbon dioxide are separated in the inside of the cryogenic tank 40, the conveying pump 41 can be started to convey the carbon dioxide liquid to the inside of the liquid storage tank 42 through the pipeline for storage.

[0041] The drying separation assembly 50 comprises a drying tank 51, the drying tank 51 is communicated with the adsorption tower 20 through a pipeline, the inside of the drying tank 51 is provided with a drying mesh cylinder 52, the inside of the drying mesh cylinder 52 is provided with a drying agent, the drying agent can be molecular sieve or silica gel particles, the molecular sieve and the silica gel particles have good water absorption, and the water in the gas can be removed, the inside of the drying tank 51 is provided with a benzene removal layer 53 and a hydrocarbon removal layer 54, the benzene removal layer 53 can perform benzene removal and hydrocarbon removal treatment on the gas, and the benzene removal and hydrocarbon removal treatment of the benzene removal layer 53 and the hydrocarbon removal layer 54 belongs to the existing mature technology.

[0042] The drying mesh cylinder 52 is close to the gas inlet position of the drying tank 51, so that the gas entering the inside of the drying tank 51 can be sequentially subjected to drying, benzene removal and hydrocarbon removal treatment.

[0043] The adsorption tower 20 is provided with a temperature sensor 27 and a pressure sensor 28, the temperature sensor 27 is used for monitoring the temperature in the inside of the adsorption tower 20, the pressure sensor 28 is used for detecting the pressure in the inside of the adsorption tower 20, the rack 10 is provided with a controller 70, the temperature sensor 27 and the pressure sensor 28 are electrically connected with the controller 70, the controller 70 is electrically connected with the heating rod 26, and the controller 70 is electrically connected with the vacuum pump 24.

[0044] The temperature information measured by the temperature sensor 27 and the pressure information measured by the pressure sensor 28 will be transmitted to the controller 70, and the starting and closing of the heating rod 26 and the vacuum pump 24 are controlled through the controller 70, so that the temperature and the pressure in the inside of the adsorption tower 20 can be better controlled, and the separation effect of the carbon dioxide is better.

[0045] The end of the drying mesh cylinder 52 is connected with a fan two 55 through a pipeline, the fan two 55 is connected with an air inlet pipe 56 at the air inlet, and the fan two 55 is used for accelerating the flow speed of the gas, so that the gas can quickly enter the inside of the adsorption tower 20.

[0046] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0047] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic specified in the present specification. The specification can also be described in terms of a single independent technical solution, but this does not mean that each embodiment only contains one independent technical solution. The specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

Claims

1. A carbon dioxide production apparatus that facilitates the recovery of non-condensable gases, characterized in that, include: Rack (10): An adsorption tower (20) is installed on a frame (10). The adsorption tower (20) is equipped with multiple adsorption beds (21) inside. The multiple adsorption beds (21) are arranged along the height direction of the adsorption tower (20). The top of the adsorption tower (20) is connected to a three-way pipe through a pipeline. An exhaust pipe (22) is connected to one of the connection ports of the three-way pipe. A solenoid valve (23) is installed on the exhaust pipe (22). A regeneration assembly is provided on the adsorption tower (20), which is used to separate carbon dioxide gas absorbed by the adsorption bed (21); A membrane separator (30) is mounted on a frame (10), and the exhaust pipe (22) is connected to the membrane separator (30). The membrane separator (30) is used to separate carbon dioxide gas and non-condensable gas. A cryogenic chamber (40) is connected to a membrane separator (30) via a pipe. The cryogenic chamber (40) is used to convert carbon dioxide gas into carbon dioxide liquid. A carbon dioxide collection assembly is connected to a cryogenic chamber (40) for collecting and storing liquid carbon dioxide; A drying and separation component (50) is disposed on an adsorption tower (20), the drying and separation component (50) being used to dry carbon dioxide gas and remove benzene and hydrocarbon components doped into the carbon dioxide gas; A non-condensable gas recovery assembly (60) is disposed between an adsorption tower (20), a membrane separator (30), and a cryogenic chamber (40), and the non-condensable gas recovery assembly (60) is used to recover non-condensable gases.

2. A carbon dioxide production device for easy recovery of non-condensable gases according to claim 1, characterized in that: The regeneration assembly includes a vacuum pump (24), an air heater (25), and a heating rod (26). The vacuum pump (24) is installed on the adsorption tower (20) and is connected to the interior of the adsorption tower (20) through a pipe. The air heater (25) is installed on the frame (10) and is connected to the interior of the adsorption tower (20) through a pipe. The heating rod (26) is installed on the adsorption bed (21).

3. A carbon dioxide production apparatus for easy recovery of non-condensable gases according to claim 1, characterized in that: The non-condensable gas recovery assembly (60) includes a recovery pipe 1 (61), a recovery pipe 2 (62), a recovery pipe 3 (63), a blower 1 (64), and a gas storage tank (65). The recovery pipe 1 (61) is connected to one port of a three-way pipe. A solenoid valve 2 (611) is installed on the recovery pipe 1 (61). The recovery pipe 2 (62) is connected to a membrane separator (30). The recovery pipe 3 (63) is connected to a cryogenic chamber (40). A four-way pipe is connected to the ends of the recovery pipe 1 (61), the recovery pipe 2 (62), and the recovery pipe 3 (63). One port of the four-way pipe is connected to the blower 1 (64) through a pipe. The blower 1 (64) is connected to the gas storage tank (65) through a pipe.

4. A carbon dioxide production apparatus for easy recovery of non-condensable gases according to claim 1, characterized in that: The carbon dioxide collection assembly includes a delivery pump (41) and a storage tank (42). The delivery pump (41) is connected to the cryogenic chamber (40) via a pipeline, and the storage tank (42) is connected to the delivery pump (41) via a pipeline.

5. A carbon dioxide production apparatus for easy recovery of non-condensable gases according to claim 2, characterized in that: The drying and separation assembly (50) includes a drying tank (51), a drying screen (52), a benzene removal layer (53), and a hydrocarbon removal layer (54). The drying tank (51) is connected to the adsorption tower (20) through a pipe. The drying screen (52), the benzene removal layer (53), and the hydrocarbon removal layer (54) are installed sequentially inside the drying tank (51). A desiccant is provided inside the drying screen (52).

6. A carbon dioxide production apparatus for easy recovery of non-condensable gases according to claim 5, characterized in that: A temperature sensor (27) and a pressure sensor (28) are installed on the adsorption tower (20). A controller (70) is installed on the frame (10). The temperature sensor (27) and the pressure sensor (28) are both electrically connected to the controller (70). The controller (70) is electrically connected to the heating rod (26) and the vacuum pump (24).

7. A carbon dioxide production apparatus for easy recovery of non-condensable gases according to claim 5, characterized in that: The end of the drying mesh cylinder (52) is connected to a second fan (55) via a pipe, and the air inlet of the second fan (55) is connected to an air inlet pipe (56).

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