Carbon dioxide recovery system

Abstract

The utility model discloses a carbon dioxide recovery system which comprises a detection pipeline, a waste gas tank, a carbon dioxide recovery tank, a carbon dioxide recovery pipeline, an emptying pipeline, a fermentation replacement washing pipeline, a first hand valve, a second hand valve and a plurality of fermentation tanks, the fermentation tank is connected with the waste gas tank through a fermentation tank washing pipe stop valve, an emptying pipeline and a detection pipeline; the fermentation tank is connected with an emptying pipeline through a fermentation tank washing pipe stop valve; the fermentation tank is connected with a carbon dioxide recovery tank through a fermentation tank washing pipe stop valve and a carbon dioxide recovery pipeline; a valve group and a residual oxygen detection device are arranged on the detection pipeline; a recovery pipeline stop valve is arranged on the emptying pipeline; a first hand valve is connected between the carbon dioxide recovery pipeline and the fermentation tank washing pipeline; and a second hand valve is connected between the emptying pipeline and the fermentation tank washing pipeline. Related pipelines of an existing fermentation tank are modified, the detection pipeline is additionally arranged to detect the carbon dioxide concentration of the fermentation tank, and high-concentration carbon dioxide is recycled.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon dioxide recovery, and particularly relates to a carbon dioxide recovery system. Background Art

[0002] The carbon dioxide generated during the beer fermentation process needs to be recovered and utilized. Before recovery, it is necessary to determine the carbon dioxide purity. When the purity reaches more than 99.5%, recovery is carried out to reduce the impact on carbon dioxide treatment equipment. The current method for detecting purity is to use lye to carry out a chemical reaction with the gas generated by the fermentation tank. The liquid level of the lye after the reaction represents the proportion of carbon dioxide in the gas generated by the fermentation tank, so as to confirm the carbon dioxide purity in the gas. This operation requires on-site manual sampling and concentration inspection using lye and carbon dioxide purity detection glass instruments.

[0003] Using the above method for carbon dioxide recovery has the following disadvantages: (1) It is easily affected by the concentration of lye, thereby affecting the accuracy of the detection results; (2) It requires on-site manual operation, including pipe disassembly, pipe connection, pouring chemical reagents, as well as gas sampling detection and reading, etc. Content of the Utility Model

[0004] In order to overcome the above technical defects, the utility model provides a carbon dioxide recovery system, which can improve the recovery purity of carbon dioxide.

[0005] The utility model is realized through the following scheme:

[0006] A carbon dioxide recovery system includes: a detection pipeline, an exhaust gas tank, a carbon dioxide recovery tank, a carbon dioxide recovery pipeline, an evacuation pipeline, a fermentation replacement washing pipeline, a first manual valve, a second manual valve, and several fermentation tanks;

[0007] The fermentation tank is connected to the exhaust gas tank through a fermentation tank washing pipe stop valve, the evacuation pipeline, and the detection pipeline;

[0008] The fermentation tank is connected to the evacuation pipeline through the fermentation tank washing pipe stop valve;

[0009] The fermentation tank is connected to the carbon dioxide recovery tank through the fermentation tank washing pipe stop valve and the carbon dioxide recovery pipeline;

[0010] A valve group and a residual oxygen detection device are arranged on the detection pipeline;

[0011] A recovery pipeline stop valve is arranged on the evacuation pipeline;

[0012] The first manual valve is connected between the carbon dioxide recovery pipeline and the fermentation tank washing pipeline;

[0013] A second manual valve is connected between the evacuation pipeline and the fermentation tank washing pipeline.

[0014] As a further improvement of the present utility model, it is characterized in that the valve group includes: a sampling system inlet valve, a sampling system evacuation valve, a valve for entering the detection device, and an atmospheric evacuation valve.

[0015] In the direction from the fermentation tank to the waste gas tank, a sampling system inlet valve, a sampling system evacuation valve, a valve for entering the detection device, and an atmospheric evacuation valve are sequentially arranged on the detection pipeline.

[0016] As a further improvement of the present utility model, the residual oxygen detection device is arranged to be connected to the valve for entering the detection device.

[0017] As a further improvement of the present utility model, the stop valve of the fermentation tank washing pipeline is a butterfly valve.

[0018] As a further improvement of the present utility model, the stop valve of the recovery pipeline is a butterfly valve.

[0019] As a further improvement of the present utility model, the sampling system inlet valve is a butterfly valve, the sampling system evacuation valve is a butterfly valve, the valve for entering the detection device is a butterfly valve, and the atmospheric evacuation valve is a butterfly valve.

[0020] As a further improvement of the present utility model, the fermentation tank is further connected to a PA inlet pipeline through the stop valve of the fermentation tank washing pipeline.

[0021] As a further improvement of the present utility model, the fermentation tank is further connected to a carbon dioxide pipeline through the stop valve of the fermentation tank washing pipeline.

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows: The relevant pipelines of the existing fermentation tank are transformed, and a detection pipeline is added to detect the carbon dioxide concentration of the fermentation tank. Each fermentation tank is provided with a stop valve for the fermentation tank washing pipeline. When the stop valve for the fermentation tank washing pipeline corresponding to a fermentation tank is closed, it can ensure that the tank does not exhaust gas. When a fermentation tank needs to exhaust gas, the corresponding stop valve for the fermentation tank washing pipeline is opened, and in cooperation with the use of the valve group, at this time, the fermentation tank to be exhausted can monopolize the detection pipeline, ensuring that the gas to be detected in the tank enters the detection pipeline. When the carbon dioxide concentration detected by the residual oxygen detection device meets the conditions, the operator opens the first manual valve and closes the second manual valve, so that the fermentation tank to be exhausted discharges carbon dioxide that meets the concentration requirements to the carbon dioxide recovery tank through the pipeline for carbon dioxide recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further describes in detail the specific implementation manners of the present utility model in conjunction with the drawings, where:

[0024] Figure 1 This is a schematic structural diagram of the carbon dioxide recovery system of the present utility model.

[0025] Marking description: 1. Fermentation tank; 2. Detection pipeline; 3. Exhaust gas tank; 4. Carbon dioxide recovery tank; 5. Carbon dioxide recovery pipeline; 6. Drainage pipeline; 7. Cut-off valve for the fermentation tank washing pipe; 8. Residual oxygen detection device; 9. Cut-off valve for the recovery pipeline; 10. Sampling system inlet valve; 11. Sampling system drainage valve; 12. Valve for entering the detection equipment; 13. Atmospheric drainage valve; 14. PA inlet pipeline; 15. Carbon dioxide pipeline; 16. Second hand valve; 17. First hand valve; 18. Fermentation tank washing pipeline. Specific embodiments

[0026] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0027] It should be noted that: Similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present utility model, the serial numbers of each step are only used to distinguish between steps, and do not represent that each step needs to be strictly executed in the order of the serial numbers.

[0028] The present utility model provides a carbon dioxide recovery system, as Figure 1 shown, including: a detection pipeline 2, an exhaust gas tank 3, a carbon dioxide recovery tank 4, a carbon dioxide recovery pipeline 5, a drainage pipeline 6, a fermentation replacement washing pipeline, a first hand valve 17, a second hand valve 16, and a plurality of fermentation tanks 1; the fermentation tank 1 is connected to the exhaust gas tank 3 through the cut-off valve for the fermentation tank 1 washing pipe, the drainage pipeline 6, and the detection pipeline 2; the fermentation tank 1 is connected to the drainage pipeline 6 through the cut-off valve 7 for the fermentation tank washing pipe; the fermentation tank 1 is connected to the carbon dioxide recovery tank 4 through the cut-off valve 7 for the fermentation tank washing pipe and the carbon dioxide recovery pipeline 5; a valve group and a residual oxygen detection device 8 are provided on the detection pipeline 2; a cut-off valve 9 for the recovery pipeline is provided on the drainage pipeline 6; a first hand valve 17 is connected between the carbon dioxide recovery pipeline 5 and the fermentation tank washing pipeline 18; a second hand valve 16 is connected between the drainage pipeline 6 and the fermentation tank washing pipeline 18, and the cut-off valve 7 for the fermentation tank washing pipe is provided on the fermentation replacement washing pipeline 18.

[0029] The residual oxygen detection device 8 is used to realize the purity detection of carbon dioxide. Among them, carbon dioxide purity % = 1 - (residual oxygen detection device detection value % / 21%).

[0030] Further, the valve group includes: a sampling system inlet valve 10, a sampling system drain valve 11, a valve 12 for entering the detection device, and an atmospheric drain valve 13; along the direction from the fermentation tank 1 towards the exhaust gas tank 3, the detection pipeline 2 is sequentially provided with a sampling system inlet valve 10, a sampling system drain valve 11, a valve 12 for entering the detection device, and an atmospheric drain valve 13.

[0031] Among them, the sampling system inlet valve 10 can allow gas to enter the detection pipeline 2 from the main exhaust pipeline, realizing the detection of the carbon dioxide concentration of the gas discharged from the fermentation tank 1. The sampling system drain valve 11 is used for draining water from the detection pipeline 2. The valve 12 for entering the detection device is used to control the gas discharged from the fermentation tank 1 to enter the residual oxygen detection device 8. The atmospheric drain valve 13 is used to allow the gas in the pipeline to enter the atmosphere for evacuation.

[0032] The residual oxygen detection device 8 is connected to the valve 12 for entering the detection device.

[0033] As one of the implementation manners, the fermentation tank washing pipe stop valve 7 can be implemented by a butterfly valve, the recovery pipeline stop valve 9 can be implemented by a butterfly valve, the sampling system inlet valve 10 can be implemented by a butterfly valve, the sampling system drain valve 11 can be implemented by a butterfly valve, the valve 12 for entering the detection device can be implemented by a butterfly valve, and the atmospheric drain valve 13 can be implemented by a butterfly valve.

[0034] The fermentation tank 1 is also connected to a PA inlet pipeline 14 through the fermentation tank washing pipe stop valve 7. For other structures here, please refer to the prior art and will not be elaborated one by one here.

[0035] The fermentation tank 1 is also connected to a carbon dioxide pipeline 15 through the fermentation tank washing pipe stop valve 7 using a cross-connecting pipe. For other structures here, please refer to the prior art and will not be elaborated one by one here.

[0036] The present utility model modifies the relevant pipelines of the existing fermentation tank, adds a detection pipeline to detect the carbon dioxide concentration of the fermentation tank, uses the original PLC to control each valve, and each fermentation tank is provided with a fermentation tank washing pipe stop valve. When the fermentation tank washing pipe stop valve corresponding to a fermentation tank is closed, it can ensure that the tank does not exhaust gas. When a fermentation tank needs to exhaust gas, the corresponding fermentation tank washing pipe stop valve is opened, and in cooperation with the use of the valve group, at this time, the fermentation tank to be exhausted can exclusively occupy the detection pipeline, ensuring that the gas entering the detection pipeline is the gas of the tank to be detected, detecting its carbon dioxide concentration, and obtaining the reading of the residual oxygen detection device 8 through the PLC; when the carbon dioxide concentration detected by the residual oxygen detection device meets the conditions, the recovery pipeline stop valve is opened, and the fermentation tank washing pipe stop valve is closed, so that the fermentation tank to be exhausted discharges carbon dioxide meeting the concentration requirements to the carbon dioxide recovery tank through the evacuation pipeline for carbon dioxide recovery.

[0037] Next, the present utility model will be further explained in combination with the specific implementation process as follows:

[0038] 1. Fermentation process

[0039] When the fermentation broth in the fermenter 1 runs to the set time, the detection of carbon dioxide concentration is triggered. Different time parameters are set according to the operation conditions of different varieties, and the inspection is carried out as close as possible to the carbon dioxide purity compliance point to reduce carbon dioxide emissions.

[0040] 2. Exhaust the pipeline

[0041] Close the cut-off valve 9 of the recovery pipeline, open the inlet valve 10 of the sampling system and the atmosphere exhaust valve 13, open the cut-off valve 7 of the washing pipe of the fermenter 1. Multiple fermenters 1 share the exhaust pipeline 5, so it is necessary to close the cut-off valves 7 of the washing pipes of other fermenters. Exhaust the gas in the detection pipeline 2, and replace the other gases in the detection pipeline 2 and the exhaust pipeline 6 with the gas discharged from the fermenter 1. After the time is up, jump to the next step.

[0042] 3. Drain the detection pipeline

[0043] Close the cut-off valve 9 of the recovery pipeline, open the atmosphere exhaust valve 13, the inlet valve 12 of the detection equipment, the exhaust valve 11 of the sampling system, and the inlet valve 10 of the sampling system, open the cut-off valve 7 of the washing pipe of the fermenter, and close the cut-off valves of the washing pipes of other fermenters with the same detection pipeline 2. Drain the gas and residual water in the detection pipeline, and replace the other gases in the detection pipeline with the gas in the detection tank. After the time is up, jump to the next step.

[0044] 4. Residual oxygen detection

[0045] Close the exhaust valve 11 of the sampling system and the cut-off valve 9 of the recovery pipeline, open the atmosphere exhaust valve 13, the inlet valve 12 of the detection equipment, and the inlet valve 10 of the sampling system, open the cut-off valve 7 of the washing pipe of the fermenter, and close the cut-off valve 7 of the washing pipe of other fermenters 1 with the same detection pipeline 2. Let the gas enter the residual oxygen detection device to detect the residual oxygen content in the gas. After reading the data, jump to the next step.

[0046] 5. Exhaust the detection pipeline

[0047] Open the atmosphere exhaust valve 13 and the cut-off valve 9 of the recovery pipeline, close the inlet valve 12 of the detection equipment, the exhaust valve 11 of the sampling system, and the inlet valve 10 of the sampling system, and restore the original state of the cut-off valve 7 of the washing pipe of the fermenter 1 in all detection pipelines 2. Restore the normal exhaust state of the fermenter 1 and the pipeline valves, and the detection is completed.

[0048] 6. Data judgment

[0049] After reading the detection data, compare it with the set qualified value, and determine whether to give a valve-switching reminder or continue the detection based on the purity of carbon dioxide in the tank. If it is unqualified, continue the detection. If it is qualified, the system will give a valve-switching reminder to prompt the operator to perform the next operation. If valve switching is required, it can be switched from pipeline 6 to pipeline 5, and the first hand valve 17 of the carbon dioxide recovery pipeline 5 needs to be opened, and the second hand valve 16 of the exhaust pipeline 6 needs to be closed.

[0050] 7. Repeated detection

[0051] If continued detection is required, start the timer. After the detection interval timing ends, sort and conduct re-detection. Repeat the detection until it is qualified. If it fails three consecutive detections, a warning will be triggered and manual detection is required.

[0052] 8. Detection interval

[0053] The detection interval can be adjusted according to the changes in the inspection data. Precisely control the carbon dioxide recovery point and reduce the external discharge amount of carbon dioxide.

[0054] 9. Manual confirmation

[0055] When there is a tank with abnormal detection, manual detection and confirmation are required.

[0056] After using the carbon dioxide recovery system of the present utility model, track the ratio of manual detection to automatic detection, and the detection ratio has decreased by more than 80%.

[0057] The comparison of the ratio of automatic detection using the carbon dioxide recovery system to the ratio of manual detection for the overall tanks is shown in Table 1:

[0058] Table 1

[0059] September October November Manual detection ratio 15.12％ 15.21％ 12.65％ Automatic detection ratio 84.88％ 84.79％ 87.35％

[0060] The comparison of the start time of carbon dioxide recovery during the fermentation process before and after switching to the carbon dioxide recovery system is shown in Table 2:

[0061] Table 2

[0062] Variety Before use After use Time saving Variety A 16.42 hours 15.62 hours 0.8 hour Variety B 13.84 hours 12.63 hours 1.21 hours Variety C 13.44 hours 12.69 hours 0.75 hour Variety D 22.76 hours 20.99 hours 1.77 hours

[0063] The above table shows that the average start time of carbon dioxide recovery during the fermentation process of the fermentation broth of four varieties has decreased significantly, reducing the carbon dioxide external discharge time and increasing the carbon dioxide recovery amount.

[0064] In summary, the present utility model has the following beneficial effects:

[0065] (1) There is no need for on-site manual sampling, and the number of manual detections of the carbon dioxide purity in the fermentation tank has decreased by 80%. Manual detection is only required during equipment calibration.

[0066] (2) The purity of carbon dioxide in the fermenter is automatically detected. If the detection fails to meet the requirements, retesting can be carried out at the set time intervals.

[0067] (3) It effectively shortens the carbon dioxide discharge time, approximately shortening the discharge time by 1 h.

[0068] (4) It significantly reduces the frequency of on-site manual operations and reduces the detection errors caused by operation mistakes.

[0069] (5) After using the carbon dioxide recovery system, the consumption of alkali and glass consumables is reduced.

[0070] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

1. A carbon dioxide recovery system, characterized in that: include: Detection pipeline, waste gas tank, carbon dioxide recovery tank, carbon dioxide recovery pipeline, emptying pipeline, fermentation replacement washing pipeline, first hand valve, second hand valve and several fermentation tanks; The fermentation tank is connected to the waste gas tank through the fermentation tank washing pipe stop valve, the emptying pipeline, and the detection pipeline; The fermentation tank is connected to an emptying pipeline via a fermentation tank washing pipe stop valve; The fermentation tank is connected to the carbon dioxide recovery tank through the fermentation tank washing pipe stop valve and the carbon dioxide recovery pipeline; The detection pipeline is provided with a valve group and a residual oxygen detection device; The emptying pipeline is provided with a recovery pipeline stop valve; The first hand valve is connected between the carbon dioxide recovery pipeline and the fermentation tank washing pipeline; The second hand valve is connected between the emptying pipe and the fermentation tank washing pipe.

2. The carbon dioxide recovery system according to claim 1, characterized in that: The valve group includes: a sampling system inlet valve, a sampling system exhaust valve, an inlet detection equipment valve, and an atmospheric exhaust valve; The detection pipeline is provided with a sampling system inlet valve, a sampling system exhaust valve, an inlet detection equipment valve, and an atmosphere exhaust valve in sequence from the fermentation tank toward the waste gas tank.

3. The carbon dioxide recovery system according to claim 2, characterized in that: The residual oxygen detection device is arranged to be connected with the valve entering the detection equipment.

4. The carbon dioxide recovery system according to claim 1, characterized in that: The fermentation tank washing pipe stop valve is a butterfly valve.

5. The carbon dioxide recovery system according to claim 1, characterized in that: The recovery pipeline stop valve is a butterfly valve.

6. The carbon dioxide recovery system according to claim 2, characterized in that: The sampling system inlet valve is a butterfly valve, the sampling system exhaust valve is a butterfly valve, the inlet detection device valve is a butterfly valve, and the atmosphere exhaust valve is a butterfly valve.

7. The carbon dioxide recovery system according to claim 1, characterized in that: The fermenter is also connected to a PA inlet pipeline through the fermenter washing pipe stop valve.

8. The carbon dioxide recovery system according to claim 1, characterized in that: The fermentation tank is also connected to a carbon dioxide pipeline through the fermentation tank washing pipe stop valve.

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