An experimental collection and detection device for ammonia production from hen manure

Abstract

The utility model provides a kind of laying hen excrement ammonia production experimental collection detection device, it is related to excrement ammonia production experimental field, including reaction tank, the upper end of the reaction tank is equipped with tank cover, the tank cover is equipped with air inlet pipe, main control valve is installed and connected in the air inlet pipe.The utility model establishes suction passage between absorption tank and reaction tank by negative pressure suction, ammonia gas produced by excrement fermentation is under the action of negative pressure, directional into absorption tank and sulfuric acid absorption liquid reaction generation ammonium sulfate along output pipe, absorption liquid is then conveniently exported, and the excrement ammonia discharge can be calculated by combining absorbance, so as to conveniently judge the influence of different proportion of composite algal powder additive on excrement ammonia discharge;Automatic opening tank cover is driven by electric cylinder, replace traditional manual unsealing and sealing, at the same time, utilize sliding rod cooperation piston structure to automatically inflate annular airbag sealing during tank cover descending, effectively reduce the friction between it and reaction tank, so that closing and sealing can be synchronous and quickly completed.

Description

Technical Field

[0001] This utility model relates to the field of ammonia production experiments in feces, and in particular to a collection and detection device for ammonia production experiments in laying hen feces. Background Technology

[0002] In the livestock and poultry farming sector, accurate measurement of ammonia production characteristics in laying hen manure is a core element in evaluating the emission reduction effects of feed additives and optimizing manure treatment processes. With increasingly stringent environmental regulations, the rapid and accurate quantification of ammonia emissions has become a critical requirement.

[0003] Existing ammonia production detection devices for laying hen manure mostly use a static seal formed by a wide-mouth bottle and a rubber ring on the cap, relying on the natural diffusion of ammonia gas for capture. However, repeated disassembly and reassembly of the rubber ring can lead to aging and gaps, easily causing ammonia leakage. Furthermore, the seal of ordinary rubber rings requires a precise fit to the inner wall of the cap. If the size is too large, the frictional resistance during cap installation makes it difficult to quickly and easily insert the cap; if the size is too small, the sealing gap is large, and the sealing effect is relatively poor, making it easy for ammonia gas to leak and resulting in inaccurate detection values.

[0004] In addition, manual sealing is required after feeding, and the operation efficiency is low when conducting multiple parallel tests. Sample feeding requires manual unsealing, which inevitably leads to sample spillage. Changing the absorbent every few hours also requires disassembling the pipeline, which takes a long time each time and may also cause ammonia leakage, further reducing the reliability of the data.

[0005] Therefore, it is necessary to provide a new experimental collection and detection device for ammonia production in laying hen manure to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides an experimental collection and detection device for ammonia production in laying hen manure.

[0007] This utility model provides an experimental collection and detection device for ammonia production in laying hen manure, comprising: a reaction vessel with a lid at its upper end, an air inlet pipe on the lid, and a main control valve connected to the air inlet pipe; a collection and detection mechanism including an output pipe, one end of which is connected to the lid, and the other end of which is connected to an absorption vessel, the upper wall of which has a discharge pipe; and an automatic lid opening mechanism including two side seats, each fixedly connected to one of the two side walls of the reaction vessel, each side seat having an installation port, and each installation port having an electric cylinder installed in it, the two electric cylinders being symmetrically arranged left and right; each of the two side walls of the lid having an alignment seat, the output ends of the two electric cylinders being fixedly connected to the two alignment seats; and a limiting component between the lid and the reaction vessel.

[0008] Preferably, the absorption tank is provided with an addition port at the upper end, and a cap is installed and connected to the addition port.

[0009] Preferably, the limiting component includes two limiting blocks, both of which are fixedly connected to the side wall of the reaction vessel. Each of the two limiting blocks is provided with a limiting port. Both sides of the vessel cover are provided with protrusions, and each of the two protrusions is fixedly connected with a limiting rod. The two limiting rods are slidably connected to the two limiting ports respectively.

[0010] Preferably, the reaction vessel has a ring opening at the mouth, and an annular groove is provided on the outer wall of the ring opening, in which an annular airbag is installed and connected.

[0011] Preferably, a thin tube is fixedly connected to the side wall of one of the limiting blocks, and a sliding rod is fixedly connected to the side wall of one of the protrusions. The sliding rod is slidably connected to the upper end wall of the thin tube, and a piston is fixedly connected to the lower end of the sliding rod.

[0012] Preferably, the lower end of the thin tube is provided with a connecting pipe, and the reaction vessel is provided with a gas delivery channel in the vessel wall. The connecting pipe is connected to one end of the gas delivery channel, and the other end of the gas delivery channel is connected to an annular gasbag.

[0013] Preferably, a liquid exchange pipe is provided on the lower end of the absorption tank wall, and a secondary control valve is installed and connected in the liquid exchange pipe.

[0014] Compared with related technologies, the experimental collection and detection device for ammonia production in laying hen manure provided by this utility model has the following beneficial effects:

[0015] 1. This utility model pre-adds a certain concentration of sulfuric acid absorbent to the absorption tank, and uses negative pressure to establish a suction channel between the absorption tank and the reaction tank, so that the reaction tank maintains a stable negative pressure environment. Under the action of negative pressure, the ammonia gas produced by the fermentation of feces enters the absorption tank through the output pipe and reacts with the sulfuric acid absorbent to generate ammonium sulfate. Then the absorbent containing ammonium salt is conveniently exported, and the absorbance can be measured in the wavelength range of the enzyme-linked immunosorbent assay (ELISA) to calculate the amount of ammonia emissions. This makes it easy to judge the effect of different ratios of compound algae powder additives on ammonia emissions.

[0016] 2. This utility model uses an electric cylinder to automatically open the can lid, replacing the traditional manual opening and closing. The cooperation between the limiting rod and the limiting block ensures that the lid rises and falls smoothly. At the same time, during the descent of the lid, the sliding rod and piston structure automatically inflate and seal the annular airbag. Compared with the traditional fixed sealing ring, this effectively reduces the friction between the sealing ring and the reaction vessel, allowing the closing and sealing to be completed simultaneously and quickly. This ensures that the sample in the reaction vessel is conveniently placed and has a good sealing effect, significantly improving the accuracy of experimental data. Attached Figure Description

[0017] Figure 1 A schematic diagram of a preferred embodiment of this utility model;

[0018] Figure 2 for Figure 1 An exploded view of a preferred embodiment is shown below;

[0019] Figure 3 for Figure 1 The diagram shows the structure at point A.

[0020] Figure 4 for Figure 2 The diagram shows the structure at point B.

[0021] The following are the labels in the diagram: 1. Reaction vessel; 2. Tank cover; 3. Inlet pipe; 31. Main control valve; 4. Output pipe; 41. Absorption tank; 42. Discharge pipe; 43. Addition tank opening; 44. Sealing cap; 5. Side seat; 51. Electric cylinder; 52. Alignment seat; 6. Limiting block; 61. Protrusion; 62. Limiting rod; 7. Ring opening; 71. Annular air bladder; 72. Thin tube; 73. Sliding rod; 74. Piston; 75. Connecting pipe; 8. Liquid replacement pipe; 81. Secondary control valve. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please refer to the following: Figures 1 to 4 A device for collecting and detecting ammonia production from laying hen manure includes: a reaction tank 1, with a tank cover 2 at the upper end of the reaction tank 1, an air inlet pipe 3 on the tank cover 2, and a main control valve 31 installed and connected in the air inlet pipe 3; a collection and detection mechanism, including an output pipe 4, one end of the output pipe 4 connected to the tank cover 2, and the other end of the output pipe 4 connected to an absorption tank 41, with a discharge pipe 42 on the upper wall of the absorption tank 41; and an automatic opening mechanism, including two side seats 5, which are fixedly connected to the two side walls of the reaction tank 1, each side seat 5 having an installation port, and each installation port having an electric cylinder 51 installed and connected to it, the two electric cylinders 51 being symmetrically arranged left and right, each side wall of the tank cover 2 having an alignment seat 52, the output ends of the two electric cylinders 51 being fixedly connected to the two alignment seats 52, and a limiting component between the tank cover 2 and the reaction tank 1.

[0024] In the specific implementation process, such as Figure 1 and Figure 2 As shown, the upper end of the absorption tank 41 is provided with an addition port 43, and a cover 44 is installed and connected to the addition port 43.

[0025] refer to Figure 2 and Figure 3As shown, the limiting assembly includes two limiting blocks 6, both of which are fixedly connected to the side wall of the reaction vessel 1. Each of the two limiting blocks 6 is provided with a limiting port. Both sides of the vessel cover 2 are provided with protrusions 61, and each of the two protrusions 61 is fixedly connected with a limiting rod 62. The two limiting rods 62 are slidably connected to the two limiting ports respectively.

[0026] It should be noted that the limiting rods 62 on the protrusions 61 on both sides of the can lid 2 slide along the limiting opening of the limiting block 6 to ensure that the can lid 2 can be raised and lowered smoothly, so as to achieve stable sealing and opening.

[0027] It should be noted that: when the electric cylinders 51 inside the two side seats 5 are activated, their output ends push the alignment seat 52 to move the can lid 2 upward. During this process, the limiting rods 62 on the protrusions 61 on both sides of the can lid 2 slide along the limiting openings of the limiting blocks 6 to ensure that the can lid 2 rises and falls smoothly. After the can lid 2 rises to the preset height (15-20cm from the opening of the reaction vessel 1), a quantitative sample of laying hen feces is put into the reaction vessel 1 to complete the quick sample delivery.

[0028] After the sample is placed, the electric cylinder 51 is controlled to retract, which drives the can lid 2 to return to its original position, completing the quick and automatic combination between the reaction vessel 1 and the can lid 2, and realizing the establishment of a suction channel between the absorption vessel 41 and the reaction vessel 1.

[0029] The addition tank opening is used to replenish the sulfuric acid absorption liquid. The cap adopts a threaded sealing design, which, when tightened, can prevent the absorption liquid in the absorption tank 41 from evaporating or outside air from entering, ensuring the ammonia absorption efficiency.

[0030] refer to Figure 1 and Figure 2 As shown, the reaction vessel 1 has a ring opening 7 at the opening position, and an annular groove is provided on the outer wall of the ring opening 7. An annular airbag 71 is installed and connected in the annular groove.

[0031] It should be noted that the ring 7 and the reaction vessel 1 are integrally molded structures, and the width of the annular groove is adapted to the annular airbag 71; the annular airbag 71 is made of nitrile rubber, which is resistant to acid and alkali corrosion. After inflation, it can tightly fit the inner wall of the tank cover 2, ensuring a low ammonia leakage rate.

[0032] refer to Figure 1 and Figure 3 As shown, a thin tube 72 is fixedly connected to the side wall of a limiting block 6, and a sliding rod 73 is fixedly connected to the side wall of a protrusion 61. The sliding rod 73 is slidably connected to the upper end wall of the thin tube 72, and a piston 74 is fixedly connected to the lower end of the sliding rod 73.

[0033] refer to Figure 2 and Figure 4As shown, a connecting pipe 75 is provided on the lower end of the thin tube 72, and a gas transmission channel is provided in the tank wall of the reaction vessel 1. The connecting pipe 75 is connected to one end of the gas transmission channel, and the other end of the gas transmission channel is connected to the annular gasbag 71.

[0034] It should be noted that the two ends of the connecting pipe 75 are connected to the thin pipe 72 and the gas transmission channel, respectively;

[0035] The gas delivery channel is an internal channel within the wall of reaction vessel 1, avoiding the problems of easy damage and leakage of external pipes, ensuring that air can be delivered to the annular airbag 71 without loss, and achieving synchronous sealing.

[0036] It should be noted that: the convex seat 61 drives the slide rod 73 to rise and fall synchronously with the tank cover 2, which pushes the piston 74 in the thin tube 72 to move accordingly, so that the air in the thin tube 72 can be forced into the gas delivery channel of the tank wall of the reaction tank 1 through the connecting pipe 75.

[0037] refer to Figure 1 and Figure 2 As shown, a liquid exchange pipe 8 is provided on the lower end of the absorption tank 41, and a secondary control valve 81 is installed and connected in the liquid exchange pipe 8.

[0038] It should be noted that the liquid exchange pipe 8 and the absorption tank 41 are integrally formed, which facilitates the discharge of excess gas; the auxiliary control valve 81 can completely block the gas flow when closed.

[0039] The working principle of the experimental collection and detection device for ammonia production in laying hen manure proposed in this utility model is as follows: When the electric cylinders 51 inside the two side seats 5 are activated, their output ends push the alignment seat 52, causing the can lid 2 to move upwards. During this process, the limiting rods 62 on the protrusions 61 on both sides of the can lid 2 slide along the limiting openings of the limiting blocks 6, ensuring the smooth raising and lowering of the can lid 2. Once the can lid 2 has risen to the preset height, a quantitative sample of laying hen manure is added into the reaction vessel 1, completing the rapid sample addition.

[0040] After the sample is added, the electric cylinder 51 retracts, causing the can lid 2 to return to its original position. At this time, the slide rod 73 on a protrusion 61 descends with the can lid 2, pushing the piston 74 inside the thin tube 72 downwards. This forces the air inside the thin tube 72 through the connecting pipe 75 into the gas delivery channel of the reaction vessel 1, and finally into the annular gas bladder 71 on the outer wall of the can opening 7. After the annular gas bladder 71 inflates, it adheres tightly to the inner wall of the can lid 2, forming an annular sealing strip to prevent ammonia gas from leaking from the can opening gaps during the reaction, ensuring the ammonia gas collection rate.

[0041] Then close the main control valve 31 of the inlet pipe 3, add 0.01 mol / L sulfuric acid absorbent to the absorption tank 41 in advance, and use negative pressure suction to establish negative pressure between the absorption tank 41 and the reaction tank 1, so as to maintain a stable negative pressure environment in the reaction tank 1, laying the foundation for the natural adsorption of ammonia.

[0042] Adjust the airflow rate to 100 mL / min. Under negative pressure, the ammonia gas produced by the fermentation of feces enters the absorption tank 41 through the output pipe 4 and reacts with the sulfuric acid absorption liquid to form ammonium sulfate. The absorption liquid is replaced every 4 hours according to the test requirements: close the valve of the output pipe 4, open the auxiliary control valve 81 of the liquid replacement pipe 8 at the lower end of the absorption tank 41, and completely export the absorption liquid containing ammonium salts into the centrifuge tube; then open the cap of the addition tank at the upper end of the absorption tank 41, inject new 0.01 mol / L sulfuric acid absorption liquid, close the cap, and restart the ammonia gas collection.

[0043] Take 400 μL of the stock solution and add it to 9.6 mL of deionized water (diluted 25 times). Then add 500 μL of potassium sodium tartrate (to mask interfering ions) and 500 μL of Nessler's reagent. After standing at room temperature for 10 min, measure the absorbance at 420 nm using an ELISA reader. Combined with the concentration and volume of the sulfuric acid absorption solution and the gas flow rate, calculate the ammonia emission during a single solution change cycle using a standard curve. Accumulate the emission over 24 hours (6 cycles) to obtain the total ammonia production from the laying hen manure.

[0044] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for collecting and detecting ammonia production in laying hen manure, characterized in that, include: The reaction vessel (1) is provided with a lid (2) at the upper end of the reaction vessel (1), and an air inlet pipe (3) is provided on the lid (2). A main control valve (31) is installed and connected in the air inlet pipe (3). The collection and testing mechanism includes an output pipe (4), one end of which is connected to the can lid (2), and the other end of which is connected to an absorption tank (41). The upper end of the absorption tank (41) is provided with a discharge pipe (42). An automatic lid opening mechanism is provided, comprising two side seats (5), which are fixedly connected to the two side walls of the reaction vessel (1) respectively. Each of the two side seats (5) is provided with an installation port, and an electric cylinder (51) is installed and connected in each of the two installation ports. The two electric cylinders (51) are symmetrically arranged on the left and right. Each of the two side walls of the lid (2) is provided with a positioning seat (52). The output ends of the two electric cylinders (51) are fixedly connected to the two positioning seats (52) respectively. A limiting component is provided between the lid (2) and the reaction vessel (1).

2. The experimental collection and detection device for ammonia production in laying hen manure according to claim 1, characterized in that, The absorption tank (41) is provided with an addition port (43) at the upper end, and a cap (44) is installed and connected to the addition port (43).

3. The experimental collection and detection device for ammonia production in laying hen feces according to claim 1, characterized in that, The limiting assembly includes two limiting blocks (6), both of which are fixedly connected to the side wall of the reaction vessel (1). Each of the two limiting blocks (6) has a limiting port. Both sides of the vessel cover (2) have protrusions (61), and each of the two protrusions (61) is fixedly connected to a limiting rod (62). The two limiting rods (62) are slidably connected to the two limiting ports respectively.

4. The experimental collection and detection device for ammonia production in laying hen manure according to claim 3, characterized in that, The reaction vessel (1) has a ring opening (7) at the opening position, and an annular groove is provided on the outer wall of the ring opening (7), and an annular airbag (71) is installed and connected in the annular groove.

5. The experimental collection and detection device for ammonia production in laying hen manure according to claim 4, characterized in that, A thin tube (72) is fixedly connected to the side wall of one of the limiting blocks (6), and a slide rod (73) is fixedly connected to the side wall of one of the protrusions (61). The slide rod (73) is slidably connected to the upper end wall of the thin tube (72), and a piston (74) is fixedly connected to the lower end of the slide rod (73).

6. The experimental collection and detection device for ammonia production in laying hen manure according to claim 5, characterized in that, The lower end of the thin tube (72) is provided with a connecting pipe (75), and the tank wall of the reaction vessel (1) is provided with a gas transmission channel. The connecting pipe (75) is connected to one end of the gas transmission channel, and the other end of the gas transmission channel is connected to the annular air bag (71).

7. The experimental collection and detection device for ammonia production in laying hen manure according to claim 1, characterized in that, The absorption tank (41) is provided with a liquid exchange pipe (8) on the lower end of the tank wall, and a secondary control valve (81) is installed and connected in the liquid exchange pipe (8).

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