Timed and quantitative powder filling device and gravity flow reactor using same

Abstract

The invention relates to the technical field of chemical dosing equipment, and particularly discloses a device for regularly and quantitatively filling powder and a gravity flow reactor applying the same, and the device for regularly and quantitatively filling powder comprises a chemical storage pipe, a nitrogen blowing device and at least one timing controller; the top end of the medicine storage tube is connected with a medicine inlet tube; the tail end of the medicine storage tube is connected with a medicine outlet tube; a first electric control valve assembly and a second electric control valve assembly are arranged on the medicine storage pipe, the first electric control valve assembly is located above the second electric control valve assembly, and a storage cavity is formed between the first electric control valve assembly and the second electric control valve assembly; one end of the breather pipe is communicated with the nitrogen blowing device, and the other end of the breather pipe is communicated with the storage cavity; a third electric control valve assembly is arranged on the breather pipe; the device for regularly and quantitatively filling the powder can realize regularly, quantitatively and automatically feeding the medicine, and meanwhile, the nitrogen blowing device can ensure that the medicine is smoothly blown into a reactor device, so that the situation that the powder blocks and is adhered to the wall of a channel is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of drug administration equipment, in particular to a device for regularly and quantitatively adding powder and a gravity flow reactor using the device. Background Art

[0002] Since some dosing times need to be set in the early morning, this poses a huge challenge to manual dosing. In addition, due to the poor fluidity of the powder, an air pump is used to blow and assist the injection to prevent the powder from sticking to the container wall. This operation will greatly increase the dissolved oxygen concentration of the sewage in the gravity flow reactor, which is inconsistent with the real anaerobic environment of the sewer. Therefore, it is believed that the current method of adding solid powder has the following shortcomings:

[0003] 1. Unable to complete the scheduled automatic dosing.

[0004] 2. After puncturing the material box, the solid powder medicine may still stick to the wall of the material box, resulting in inaccurate final dosage.

[0005] 3. Air-blown powder dosing causes the dissolved oxygen concentration of sewage in the reactor system to increase, which is inconsistent with the actual sewer environment and is not conducive to the operation and maintenance of the sewer reactor. Summary of the invention

[0006] The present invention provides a device for adding powder at a fixed time and in a fixed quantity in order to solve the above technical problems.

[0007] To solve the above problems, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a device for timed and quantitative powder filling, comprising: a medicine storage tube, a nitrogen blowing device and at least one timing controller.

[0009] The top of the drug storage tube is connected with a drug inlet tube, and the bottom of the drug storage tube is connected with a drug outlet tube.

[0010] The medicine storage tube is provided with a first electrically controlled valve component and a second electrically controlled valve component. The first electrically controlled valve component is located above the second electrically controlled valve component. A storage cavity is formed between the first electrically controlled valve component and the second electrically controlled valve component.

[0011] The medicine storage tube is connected with a ventilation tube, one end of the ventilation tube is communicated with the nitrogen blowing device, and the other end of the ventilation tube is communicated with the storage chamber.

[0012] The ventilation pipe is provided with a third electrically controlled valve assembly.

[0013] The first electrically-controlled valve component, the second electrically-controlled valve component and the third electrically-controlled valve component are all electrically connected to the at least one timing controller.

[0014] The device for timed and quantitative powder filling provided in at least one embodiment of the present disclosure further includes a base and a cover.

[0015] A containing cavity is formed between the base and the cover body, and the medicine storage tube is fixedly arranged in the containing cavity.

[0016] The medicine inlet pipe and the medicine outlet pipe are both fixedly connected to the base and / or the cover.

[0017] In the device for timed and quantitative powder filling provided by at least one embodiment of the present disclosure, the first electrically controlled valve assembly, the second electrically controlled valve assembly and the third electrically controlled valve assembly all include: a fixed column, a spring, a valve gate and a driving device.

[0018] The valve gate is slidably arranged on the medicine storage tube, and the valve gate is used to control the on-off of the medicine storage tube pipeline.

[0019] The fixing column is used to fix the spring on the base.

[0020] The driving device is used to drive the valve gate to open.

[0021] The spring is fixedly connected to the valve gate, and the spring is used to drive the valve gate to reset so that the valve gate is in a normally closed state.

[0022] In the device for timed and quantitative powder filling provided by at least one embodiment of the present disclosure, the driving device is an electromagnet.

[0023] In the device for timed and quantitative powder filling provided by at least one embodiment of the present disclosure, the inner diameter of the ventilation tube is smaller than the inner diameter of the medicine storage tube.

[0024] In the device for timed and quantitative powder filling provided by at least one embodiment of the present disclosure, the medicine feeding tube has a flared section, and the flared section is located at an end away from the medicine storage tube.

[0025] The medicine outlet tube has a constricted section, and the constricted section is located at an end away from the medicine storage tube.

[0026] In the device for timed and quantitative powder filling provided in at least one embodiment of the present disclosure, a plurality of positioning holes are provided on the cover body.

[0027] In a second aspect, the present invention further provides a gravity flow reactor, comprising the above-mentioned device for adding powder at a fixed time and in a fixed quantity.

[0028] The beneficial effects of the present invention are:

[0029] 1. The timing controller controls the first electric-controlled valve assembly, the second electric-controlled valve assembly and the third electric-controlled valve assembly to achieve the timed and quantitative automatic addition of solid powdered medicines, which can ensure that the medicines are accurately added to the reactor at the predetermined time.

[0030] 2. Since a storage chamber is formed between the first electrically-controlled valve assembly and the second electrically-controlled valve assembly, the volume of the storage chamber is rated, so that the maximum feed volume rating can be guaranteed, which can help improve the accuracy of dosing.

[0031] 3. The application of nitrogen blowing device can ensure that the reagent is blown into the reactor device smoothly, avoiding the situation that the powder is blocked and sticks to the storage pipe and the discharge pipe, thereby eliminating the waste of reagent and inaccurate dosage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 The figure is a schematic diagram of the overall structure of a device for adding powder at a fixed time and in a fixed quantity according to the present invention.

[0034] Figure 2 The figure is a partial structural diagram of a device for adding powder at a fixed time and in a fixed quantity according to the present invention.

[0035] Figure 3 This is a schematic diagram of the overall structure of the gravity flow reactor provided by the present invention.

[0036] Figure 4 Schematic diagram of the parallel operation of four laboratory-scale gravity flow reactors in the experimental example.

[0037] Figure 5 This is the hydraulic retention time diagram in the experimental example.

[0038] Figure 6 This is a graph showing the change in sulfide concentration in wastewater over time under the conditions of automatic timed and quantitative dosing and manual dosing in the experimental example within two weeks.

[0039] In the figure:

[0040] 10. Medicine storage tube; 11. First electric-controlled valve assembly; 12. Second electric-controlled valve assembly; 13. Storage chamber; 14. Ventilation tube; 15. Medicine inlet tube; 16. Medicine outlet tube; 121. Fixed column; 122. Spring; 123. Valve gate;

[0041] 20. Nitrogen blowing device;

[0042] 30. Timing controller;

[0043] 40. base; 41. accommodating cavity;

[0044] 50. cover body; 51. positioning hole;

[0045] 60. Reactor body;

[0046] 70. Reactor upper plate;

[0047] 80. Reactor lower plate;

[0048] 90. Sediment carrier;

[0049] 100. Agitator;

[0050] 110. Sewage inlet;

[0051] 120. Sewage outlet;

[0052] 130. Liquid storage tank. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the drawings in the embodiments. Obviously, the described embodiments are only a part of the embodiments, rather than all the embodiments.

[0054] Example 1

[0055] like Figure 1 As shown, this embodiment provides a device for adding powder in a timed and quantitative manner, comprising: a medicine storage tube 10, a nitrogen blowing device 20, a timing controller 30, a base 40 and a cover 50.

[0056] Specifically, the top of the drug storage tube 10 is connected to a drug inlet tube 15, and the end of the drug storage tube 10 is connected to a drug outlet tube 16. The drug storage tube 10 is provided with a first electrically controlled valve assembly 11 and a second electrically controlled valve assembly 12, the first electrically controlled valve assembly 11 is located above the second electrically controlled valve assembly 12, and a storage chamber 13 is formed between the first electrically controlled valve assembly 11 and the second electrically controlled valve assembly 12. The drug storage tube 10 is connected to a vent pipe 14, one end of the vent pipe 14 is connected to the nitrogen blowing device 20, and the other end of the vent pipe 14 is connected to the storage chamber 13. The vent pipe 14 is provided with a third electrically controlled valve assembly (not shown).

[0057] Specifically, three timing controllers 30 are configured, and the first electrically-controlled valve assembly 11 , the second electrically-controlled valve assembly 12 and the third electrically-controlled valve assembly are electrically connected to the three timing controllers 30 respectively.

[0058] In this embodiment, the first electrically-controlled valve assembly 11 , the second electrically-controlled valve assembly 12 and the third electrically-controlled valve assembly all adopt electrically-controlled valves.

[0059] In this embodiment, a receiving cavity 41 is formed between the base 40 and the cover 50, and the drug storage tube 10 is fixedly disposed in the receiving cavity 41. The drug inlet tube 15 and the drug outlet tube 16 are both fixedly connected to the base 40; the drug inlet tube 15 and the drug outlet tube 16 are both fixedly connected to the cover 50.

[0060] In this embodiment, the inner diameter of the ventilation tube 14 is smaller than the inner diameter of the medicine storage tube 10 .

[0061] In this embodiment, the drug inlet pipe 15 has a flared section, which is located at one end away from the drug storage pipe 10 . The drug outlet pipe 16 has a constricted section, which is located at one end away from the drug storage pipe 10 .

[0062] In this embodiment, a plurality of positioning holes 51 are provided on the cover body 50, and screws can pass through the positioning holes 51 to facilitate connection of the cover body with other objects, thereby improving convenience.

[0063] Example 2

[0064] like Figure 2 As shown, this embodiment provides a device for timed and quantitative powder filling, which is different from Example 1 in that the first electrically controlled valve assembly 11, the second electrically controlled valve assembly 12 and the third electrically controlled valve assembly all include: a fixed column 121, a spring 122, a valve gate 123 and a driving device (not shown).

[0065] Specifically, the valve gate 123 is slidably disposed on the medicine storage tube 10. The fixing column 121 is used to fix the spring 122 on the base 40. The medicine storage tube 10 can be blocked by moving the valve gate 123.

[0066] Specifically, the driving device is used to drive the valve gate to move, thereby controlling the on-off of the medicine storage tube 10 .

[0067] Specifically, the spring 122 is fixedly connected to the valve gate 123 , and the spring 122 is used to drive the valve gate 123 to reset, so that the valve gate 123 is in a normally closed state.

[0068] In some examples not shown, the driving device is an electromagnet.

[0069] In some examples not shown, the driving device adopts an electric wire take-up device, on which a pull wire is provided. The pull wire is fixedly connected to the valve gate, and the part of the pull wire extending out of the electric wire take-up device is parallel to the central axis of the spring 122 .

[0070] In another aspect, the present invention also provides a gravity flow reactor.

[0071] like Figure 3 As shown, the gravity flow reactor includes the device for adding powder at a fixed time and in a fixed quantity in Example 2.

[0072] The gravity flow reactor specifically includes: a reactor body 60 , a reactor upper plate 70 , a reactor lower plate 80 , a sediment carrier 90 , an agitator 100 , a sewage inlet 110 , a sewage outlet 120 and a liquid storage tank 130 .

[0073] The drug outlet pipe 16 is communicated with the reactor body 60 .

[0074] The agitator 100 is arranged in the gravity flow reactor, which promotes the uniform dispersion of the solid powder and makes the reagent fully contact with the sewage. This design improves the effectiveness of the reagent and the accuracy of the experiment.

[0075] Through the use of agitators, the solid powder entering the sewage can be evenly dispersed in the system, allowing the agent to fully contact the sewage, thereby improving the utilization rate of the agent and the odor removal effect.

[0076] The effect of the gravity flow reactor provided by the present invention is further illustrated by public experimental examples below.

[0077] like Figure 4 As shown, four laboratory-scale gravity flow reactors are run in parallel to simulate the environment of sewer gravity pipes, wherein the first group is a control group, and the other three groups are experimental groups. Each reactor has a working volume of 3.2L, including a gas volume of 0.5L, and a reactor bottom diameter of 140mm and a height of 210mm. In addition, there is an extra cylinder (diameter 120mm, depth 60mm) at the bottom of the reactor, which is used as a sediment carrier. Agitator is positioned at the water surface (approximately 12cm above the sediment surface). Apply a mixing speed of 40rpm to realize aeration in the reactor so that a certain dissolved oxygen concentration is reached in the sewage in the reactor.

[0078] The wastewater used for the experimental study was from a sewage pumping station. Fresh sewage was taken weekly and stored in a cold room at 4°C to minimize biotransformation during storage. Before being pumped into the reactor, the sewage was heated to 20±1°C in a water bath.

[0079] The peristaltic pump was used to intermittently inject sewage into the reactor, and each operation cycle was 6 hours. The pumping pattern of the reactor within 24 hours and the hydraulic retention time (HRT) of the sewage in the reactor were as follows: Figure 5 As shown, the vertical solid line represents intermittent sewage pumping, and the dotted line represents the HRT of the sewage in the reactor. Each pumping time is about 2 minutes, and the flow rate is 0.5L·min -1 The wastewater in each reactor was mixed by a magnetic stirrer at a speed of 200 rpm.

[0080] Before starting to dosing, the reactor needs to be run for a certain period of time to cultivate mature and complete sediments and establish pseudo-steady-state conditions. A steady-state monitoring experiment of the gravity flow reactor is carried out every two weeks. If a stable sulfide concentration and a stable sulfide generation rate appear in the gravity flow reactor, it indicates that the gravity flow reactor has reached a steady-state condition.

[0081] When the gravity flow reactor reached steady-state conditions, FeC2O4·2H2O (a solid powder reagent that is insoluble in water at room temperature) was added to the E1 experimental group in a ratio of 1 (Fe): 1 (S). The dosage was added three times in equal amounts at an interval of 5.5 / 3h. The dosage time was 0h, 5.5 / 3h and 11 / 3h of a pumping cycle.

[0082] The details of automatic timing and quantitative dosing of FeC2O4·2H2O are as follows:

[0083] First, about 0.5 h before the dosing time of the reactor body 60 (i.e., about 0.5 h before 0 h, 5.5 / 3 h, and 11 / 3 h of a pumping cycle), the first electrically controlled valve assembly 11 is opened while the second electrically controlled valve assembly 12 is closed, and the powder is poured into the storage chamber 13 until the storage chamber 13 is completely filled. Subsequently, the first electrically controlled valve assembly 11 is closed to complete the medicine storage operation.

[0084] Secondly, at the dosing time (i.e., 0h, 5.5 / 3h, and 11 / 3h of a pumping cycle), the second electrically controlled valve assembly 12 is opened while the first electrically controlled valve assembly 11 is closed, and the powder falls from the storage chamber 13 into the reactor body 60. At the same time, during this process, the vent pipe 14 is externally connected to a nitrogen bottle, which serves as a nitrogen blowing device, and the nitrogen purge start and close time points are controlled by the third electrically controlled valve assembly, and the start and close time points of the second electrically controlled valve assembly 12 and the third electrically controlled valve assembly are completely consistent.

[0085] Finally, when FeC2O4·2H2O completely falls into the reactor body 60, the agitator 100 can stir the newly fallen powder to fully contact the sewage and sediment while maintaining the dissolved oxygen in the sewage in the reactor body 60.

[0086] After the addition of FeC2O4·2H2O to E1 was completed, a batch test was immediately carried out to compare the sulfide and sulfate concentrations in the wastewater under the conditions of dosing and not dosing, and to study the effect of ferrous oxalate in removing sulfides. During each batch test, 25 ml of wastewater sample was taken from the sewage outlet 7, and the sampling times were: 0h (after the first dosing), 5.5 / 3h (before the second dosing), 11 / 3h (before the third dosing) and 5.5h. After each sampling, 25 ml of sewage was added to the reactor body 60 in time from the liquid reservoir 130 to maintain the sewage volume in the reactor. The sulfide concentration was analyzed immediately after the wastewater sample was filtered. The test was repeated at the same pumping circulation every week for two weeks.

[0087] The experimental results of sulfide concentration obtained by using the above device and experimental scheme are similar to those obtained by manually adding the same amount of FeC2O4·2H2O at the corresponding time. Figure 6 As shown in the figure, the sulfide concentrations in the two groups showed the same trend during the two-week test period. The results of the independent sample t-test on the two groups of data are shown in the following table.

[0088] Independent sample t-test result table:

[0089]

[0090] After Leven's test, the assumption of homogeneity of variance was met. t=0.005, p=0.996>0.05, indicating that there was no significant difference between the two groups of data, which shows that the dosing of this device and manual dosing have the same accuracy in terms of dosage and dosing time. However, compared with manual dosing, this device embodies the advantage of "timing, quantitative and automatic" dosing, which brings great convenience to the dosing of drugs in future urban sewage pipe networks.

[0091] Although the embodiments of the present application have been shown and described above, the scope of protection of the present invention is not limited thereto, and any changes or substitutions that are not conceivable through creative work should be included in the scope of protection of the present invention; unless explicitly stated, any elements, actions or instructions used in this document should not be interpreted as critical or necessary.

Claims

1. A device for adding powder at a fixed time and in a fixed quantity, characterized in that: include: A medicine storage tube, a nitrogen blowing device and at least one timing controller; The top of the drug storage tube is connected to a drug inlet tube, and the bottom of the drug storage tube is connected to a drug outlet tube; The medicine storage tube is provided with a first electrically controlled valve component and a second electrically controlled valve component, the first electrically controlled valve component is located above the second electrically controlled valve component, and a storage cavity is formed between the first electrically controlled valve component and the second electrically controlled valve component; The medicine storage tube is connected to a ventilation tube, one end of the ventilation tube is connected to the nitrogen blowing device, and the other end of the ventilation tube is connected to the storage chamber; A third electrically controlled valve assembly is provided on the ventilation pipe; The first electrically-controlled valve component, the second electrically-controlled valve component and the third electrically-controlled valve component are all electrically connected to the at least one timing controller.

2. A device for adding powder at a fixed time and in a fixed quantity according to claim 1, characterized in that: Also includes a base and a cover; A receiving cavity is formed between the base and the cover, and the medicine storage tube is fixedly arranged in the receiving cavity; The medicine inlet pipe and the medicine outlet pipe are both fixedly connected to the base and / or the cover.

3. A device for adding powder at a fixed time and in a fixed quantity according to claim 2, characterized in that: The first electrically controlled valve assembly, the second electrically controlled valve assembly and the third electrically controlled valve assembly each include: Mounting posts, springs, valve gates and drive devices; The valve gate is slidably arranged on the medicine storage tube, and the valve gate is used to control the on-off of the medicine storage tube pipeline; The fixing column is used to fix the spring on the base; The driving device is used to drive the valve gate to open; The spring is fixedly connected to the valve gate, and the spring is used to drive the valve gate to reset so that the valve gate is in a normally closed state.

4. A device for adding powder at a fixed time and in a fixed quantity according to claim 3, characterized in that: The driving device is an electromagnet.

5. The device for adding powder at a fixed time and in a fixed quantity according to claim 1, characterized in that: The inner diameter of the ventilation tube is smaller than the inner diameter of the medicine storage tube.

6. The device for adding powder at a fixed time and in a fixed quantity according to claim 1, characterized in that: The drug inlet tube has a flared section, and the flared section is located at an end away from the drug storage tube; The medicine outlet tube has a constricted section, and the constricted section is located at an end away from the medicine storage tube.

7. The device for adding powder at a fixed time and in a fixed quantity according to claim 2, characterized in that: The cover body is provided with a plurality of positioning holes.

8. A gravity flow reactor, characterized in that: A device for adding powder at a fixed time and in a fixed quantity as claimed in any one of claims 1 to 7.

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