Azotization distillation device for pig farm wastewater treatment

Abstract

The invention belongs to the technical field of distillation devices, and discloses a pig farm wastewater treatment nitrogen determination distillation device which comprises a reaction tube, and a conveying structure is arranged on one side of the reaction tube; the conveying structure comprises a connecting pipe, a conveying pipe, a sample inlet, a sealing plug, a connecting rod, a sealing plate and a sealing structure, the connecting pipe is fixedly mounted on one side of the reaction pipe, the conveying pipe is fixedly mounted on one side of the connecting pipe, the sample inlet is formed in the top of the conveying pipe, and the sealing plug is arranged in the sample inlet. By increasing the volume of the reaction chamber of the reaction tube, adding 1ml of liquid paraffin into the sample liquid in the reaction chamber, preventing the formation of foams and keeping the sample inlet sealed under the action of the sealing plate, the sealing plug, the first sealing block and the second sealing block, dust and other impurities are prevented from easily entering the reaction tube to cause pollution and influence the measurement result, and the measurement accuracy is improved. Detection is efficient and fast, detected data are accurate, and use is convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of distillation devices, and in particular relates to a nitrogen determination distillation device for treating piggery wastewater. Background Art

[0002] Nitrogen content in pig farm wastewater primarily consists of compounds such as ammonia and nitrate. The levels of these compounds directly impact wastewater treatment effectiveness and discharge standards. Ammonia is a key indicator of wastewater organic matter content and odor. Excessive levels can cause wastewater to become dark and odorous, impacting environmental quality. Therefore, wastewater testing using a nitrogen determination distillation unit is necessary to measure nitrogen content and evaluate treatment effectiveness.

[0003] However, in the prior art, after the sample is added to the interior of the reaction tube, the sample inlet is sealed with a glass stopper and then water-sealed. This easily generates foam during the sample detection process, and dust and other impurities easily enter the water at the sample inlet. Therefore, when the reaction is completed, dust and other impurities will enter the interior of the reaction tube along with the water, causing contamination and affecting the measurement results. Summary of the Invention

[0004] The present invention aims to solve the problems in the prior art and proposes the following technical solutions: a nitrogen determination and distillation device for treating pig farm wastewater, comprising a reaction tube, one side of which is provided with a conveying structure;

[0005] The conveying structure includes a connecting tube, a conveying tube, a sample inlet, a sealing plug, a connecting rod, a sealing plate, and a sealing structure. A connecting tube is fixedly installed on one side of the reaction tube, a conveying tube is fixedly installed on one side of the connecting tube, a sample inlet is provided at the top of the conveying tube, a sealing plug is provided inside the sample inlet, a connecting rod is fixedly installed on the top of the sealing plug, a sealing plate is fixedly installed on one end of the connecting rod, the sealing plate is located at the top of the sample inlet, and a sealing structure is provided at the bottom of the sealing plate and at the top of the sample inlet.

[0006] As a preferred embodiment of the above technical solution, a reaction chamber is provided at the upper end of the reaction tube, and a sample liquid is provided inside the reaction tube. The sample liquid contains 1 ml of liquid paraffin. The shape of the sample inlet and the sealing plug are both trapezoidal, and the sealing structure is distributed in a circular array with the center of the sealing plate.

[0007] As a preferred embodiment of the above technical solution, the sealing structure includes a movable ring, a movable rod, a fixed block, a first movable block, a connecting block, a first spring, a movable rod, and a first sealing block. The movable rod is fixedly installed on the bottom of the movable ring, the fixed block is fixedly installed on the bottom of the sealing plate, the movable rod passes through the sealing plate and extends to the inside of the fixed block, the first movable block is arranged inside the fixed block, connecting blocks are fixedly installed on both sides of the first movable block, the first spring is fixedly installed on one side of the connecting block, one side of the first spring is fixedly installed to the inner wall of the fixed block, the movable rod is fixedly installed on the side of the first movable block away from the first spring, and the first sealing block is fixedly installed on one side of the movable rod.

[0008] As a preferred embodiment of the above technical solution, the movable ring is located at the top of the sealing plate and on the outside of the connecting rod. An insertion rod is fixedly installed at the bottom of the movable ring. A connecting spring is sleeved on the outside of the insertion rod. One end of the connecting spring is fixedly installed on the top of the sealing plate. A slot is provided at the top of the sealing plate. The insertion rod is plugged into the slot. The insertion rod and the connecting spring are located between the movable rod.

[0009] As a preferred embodiment of the above technical solution, the bottom of the first movable block is slidingly connected to the inner wall of the bottom of the fixed block, a first bulge is provided at the bottom end of the movable rod, the side of the first movable block close to the first bulge is a slope, the first bulge is located at the bottom end of the slope, an annular groove is provided at the bottom of the sealing plate, the movable rod passes through one side of the fixed block and extends to the annular groove, the first sealing block is located in the annular groove, and one side of its bottom end is in contact with the inner wall of the sample inlet.

[0010] As a preferred embodiment of the above technical solution, grooves are provided at both ends of the first sealing block, a second spring is fixedly installed on the inner wall of the groove, a second sealing block is fixedly installed on one end of the second spring, the bottom of the second sealing block is slidably connected to the groove, a magnetic block is fixedly installed on one side of the second sealing block, and the magnetic blocks are magnetically connected.

[0011] As a preferred embodiment of the above technical solution, the first sealing block is arc-shaped, one end of the second sealing block is located on the inner wall of the groove, and the other end is located outside the groove, and it is located between the two first sealing blocks, one side of the second sealing block is in contact with the inner wall of the sample inlet, and the first sealing block and the second sealing block are both located at the joint between the sealing plate and the sample inlet.

[0012] As a preferred embodiment of the above technical solution, a movable groove is provided at the top of the connecting rod, a connecting plate is fixedly installed at the top of the movable rod, a pushing rod is fixedly installed at the bottom of the connecting plate, a second convex is fixedly installed at the bottom of the pushing rod, a second movable block is provided at the bottom of the second convex, a compression spring is fixedly installed at the bottom of the second movable block, and a scraper is fixedly installed at one end of the second movable block through one side of the connecting rod.

[0013] As a preferred embodiment of the above technical solution, telescopic rods are fixedly installed at the bottom of the connecting plate and on both sides of the push rod, fixed grooves are opened at the top of the connecting rod and on both sides of the movable groove, the fixed end of the telescopic rod is located inside the fixed groove, and its bottom is fixedly installed with the fixed groove, the second convex part is located at the top of the inclined surface of the second movable block, one end of the compression spring is fixedly installed with the inner wall of the movable groove, and the scraper is located at the bottom of the first sealing block.

[0014] The beneficial effects of the present invention are:

[0015] (1) The present invention increases the volume of the reaction chamber of the reaction tube and adds 1 ml of liquid paraffin to the sample liquid in the reaction chamber to prevent the formation of foam. The sealing plate, the sealing plug, the first sealing block, and the second sealing block seal the sample inlet to prevent dust and other impurities from easily entering the interior of the reaction tube and causing contamination that affects the measurement results. This makes the detection efficient and fast, the measured data accurate, and the device easy to use.

[0016] (2) The present invention uses the connecting plate to drive the push rod and the second circular convex action, so that the second moving block drives the scraper to fit the inner wall of the sample inlet, and then rotates the connecting rod, so that the connecting rod drives the scraper to rotate, preventing liquid paraffin from remaining on the inner wall of the sample inlet and adhering to it, which is difficult to clean and affects the subsequent detection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 What is shown is a schematic diagram of the overall structure of the embodiment;

[0018] Figure 2 Shown is a cross-sectional view of the sample inlet of the embodiment;

[0019] Figure 3 Shown is Figure 3 A magnified view of point A;

[0020] Figure 4 Shown is a bottom structural diagram of the sealing plate of an embodiment;

[0021] Figure 5 Shown is a structural diagram of the sealing structure, sealing plug, scraper and connecting rod of an embodiment;

[0022] Figure 6 Shown is a structural diagram of a sealing structure according to an embodiment.

[0023] In the figure: 1. reaction tube; 2. connecting tube; 3. delivery tube; 4. sample inlet; 5. sealing plug; 6. connecting rod; 7. sealing plate; 8. reaction chamber; 9. moving ring; 10. moving rod; 11. fixed block; 12. first moving block; 13. connecting block; 14. movable rod; 15. first sealing block; 16. insertion rod; 17. connecting spring; 18. compression spring; 19. second sealing block; 20. magnetic block; 21. connecting plate; 22. pushing rod; 23. second convex; 24. second moving block; 25. scraper; 26. telescopic rod. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0025] The present invention provides a nitrogen determination distillation device for treating pig farm wastewater, such as Figure 1 、 Figure 2 、 Figure 4 As shown, it includes a reaction tube 1, and a conveying structure is provided on one side of the reaction tube 1;

[0026] The conveying structure includes a connecting tube 2, a conveying tube 3, a sample inlet 4, a sealing plug 5, a connecting rod 6, a sealing plate 7, and a sealing structure. The connecting tube 2 is fixedly installed on one side of the reaction tube 1, and the conveying tube 3 is fixedly installed on one side of the connecting tube 2. A sample inlet 4 is provided on the top of the conveying tube 3, and a sealing plug 5 is provided inside the sample inlet 4. A connecting rod 6 is fixedly installed on the top of the sealing plug 5, and a sealing plate 7 is fixedly installed on one end of the connecting rod 6. The sealing plate 7 is located at the top of the sample inlet 4, and a sealing structure is provided at the bottom of the sealing plate 7 and at the top of the sample inlet 4. A reaction chamber 8 is provided at the upper end of the reaction tube 1, and a sample liquid is provided inside the reaction tube 1. The sample liquid contains 1 ml of liquid paraffin. The sample inlet 4 and the sealing plug 5 are both trapezoidal in shape, and the sealing structure is distributed in a circular array with the center of the sealing plate 7.

[0027] By more than doubling the volume of the reaction chamber 8, the foam generated during the detection process is not easily washed up to contaminate the distillate, thereby improving the detection effect. The trapezoidal sample inlet 4 facilitates the sample liquid and liquid paraffin to quickly enter the reaction tube 1 for reaction. The sample liquid enters the interior of the reaction tube 1 through the delivery tube 3 and the connecting tube 2 through the sample inlet 4, and 1 ml of liquid paraffin is added to the interior of the reaction tube 1 to prevent the formation of foam. The connecting rod 6 then drives the sealing plug 5 to be placed inside the sample inlet 4, so that the sealing plate 7 is placed on the top of the sample inlet 4, so that the sealing plug 5 blocks the sample inlet 4, and the sealing plate 7 blocks the top of the sample inlet 4, so that the sealing structure keeps the sealing plate 7 and the sample inlet 4 sealed, thereby improving the sealing performance of the sample inlet 4 and preventing dust and other impurities from easily entering the interior of the reaction tube 1, causing pollution and affecting the measurement results, making the detection efficient and fast, the measured data accurate, and easy to use.

[0028] like Figures 3 to 6 As shown, the sealing structure includes a moving ring 9, a moving rod 10, a fixed block 11, a first moving block 12, a connecting block 13, a first spring, a movable rod 14, and a first sealing block 15. The moving rod 10 is fixedly installed on the bottom of the moving ring 9, and the fixed block 11 is fixedly installed on the bottom of the sealing plate 7. The moving rod 10 passes through the sealing plate 7 and extends to the inside of the fixed block 11. The first moving block 12 is arranged inside the fixed block 11. Connecting blocks 13 are fixedly installed on both sides of the first moving block 12. The first spring is fixedly installed on one side of the connecting block 13. One side of the first spring is fixedly installed to the inner wall of the fixed block 11. The movable rod 14 is fixedly installed on the side of the first moving block 12 away from the first spring, and the first sealing block 15 is fixedly installed on one side of the movable rod 14.

[0029] When the sealing plate 7 is located at the top of the sample inlet 4 and the sealing plug 5 blocks the sample inlet 4, the movable ring 9 is moved downward, so that the movable ring 9 drives the movable rod 10 to move toward the inside of the fixed block 11, so that the movable rod 10 pushes the first movable block 12 to move toward the movable rod 14, so that the connecting block 13 drives the first spring to stretch, and the first movable block 12 drives the movable rod 14 and the first sealing block 15 to move, so that one side of the first sealing block 15 is in contact with the inner wall of the groove, and the bottom side thereof is in contact with the inner wall of the top end of the sample inlet 4. The connection part between the sample inlet 4 and the first sealing block 15 is kept sealed by the first sealing block 15 to prevent the gas generated during the reaction of the reaction tube 1 from leaking, which affects the accuracy of the nitrogen content determination.

[0030] like Figures 3 to 6 As shown, the movable ring 9 is located at the top of the sealing plate 7 and on the outside of the connecting rod 6. An insert rod 16 is fixedly installed at the bottom of the movable ring 9. A connecting spring 17 is sleeved on the outside of the insert rod 16. One end of the connecting spring 17 is fixed to the top of the sealing plate 7. A slot is provided at the top of the sealing plate 7. The insert rod 16 is plugged into the slot. The insert rod 16 and the connecting spring 17 are located between the movable rod 10.

[0031] The movable ring 9 is located at the top of the sealing plate 7 by connecting the spring 17. When the movable ring 9 moves downward, the connecting spring 17 is compressed, and the insertion rod 16 is plugged into the slot at the top of the sealing plate 7, thereby fixing the position of the movable ring 9, so that the movable rod 10 squeezes the first movable block 12 to drive the movable rod 14 and the first sealing block 15 to move, so that the first sealing block 15 fits with the inner wall of the top of the sample inlet 4 and remains stable, further improving the sealing performance of the connection between the sample inlet 4 and the first sealing block 15.

[0032] like Figures 3 to 6 As shown, the bottom of the first movable block 12 is slidably connected to the inner wall of the bottom of the fixed block 11, and a first convex is provided at the bottom end of the movable rod 10. The side of the first movable block 12 close to the first convex is an inclined surface, and the first convex is located at the bottom end of the inclined surface. An annular groove is provided at the bottom of the sealing plate 7, and the movable rod 14 extends through one side of the fixed block 11 to the annular groove. The first sealing block 15 is located in the annular groove, and one side of its bottom end is in contact with the inner wall of the sample inlet 4.

[0033] When the moving ring 9 drives the moving rod 10 to move downward, the first circular protrusion at the bottom of the moving rod 10 moves along one side of the first moving block 12 to squeeze the first moving block 12. When the first circular protrusion moves to the bottom end of the inclined surface, the first moving block 12 drives the movable rod 14 and the first sealing block 15 to move, so that the top side of the first sealing block 15 fits with the inner wall of the annular groove, and the bottom side fits with the inner wall of the top of the sample inlet 4, thereby maintaining a seal at the connection between the sample inlet 4 and the sealing plate 7, thereby improving the sealing performance of the reaction tube 1 during the reaction, facilitating the reaction, and improving the detection effect.

[0034] like Figures 4 to 6 As shown, grooves are provided at both ends of the first sealing block 15, and a second spring is fixedly installed on the inner wall of the groove. A second sealing block 19 is fixedly installed on one end of the second spring. The bottom of the second sealing block 19 is slidably connected to the groove, and a magnetic block 20 is fixedly installed on one side of the second sealing block 19. The magnetic blocks 20 are magnetically connected to each other. The first sealing block 15 is arc-shaped, and one end of the second sealing block 19 is located on the inner wall of the groove, and the other end is located outside the groove, and it is located between the two first sealing blocks 15. One side of the second sealing block 19 is in contact with the inner wall of the sample inlet 4, and the first sealing block 15 and the second sealing block 19 are both located at the joint between the sealing plate 7 and the sample inlet 4.

[0035] When the first sealing block 15 moves to the connection between the sample inlet 4 and the sealing plate 7, through the magnetic connection of the magnetic block 20, the magnetic blocks 20 attract each other and drive the second sealing block 19 to move, so that one end of the second sealing block 19 moves along the groove to the outside of the groove, stretching the second spring, thereby placing the second sealing block 19 between the first sealing block 15, and keeping the connection between the sample inlet 4 and the sealing plate 7 sealed, so as to prevent gas leakage during the reaction, and dust and impurities in the air from adhering to the inner wall of the sample inlet 4, affecting the subsequent reaction effect.

[0036] like Figures 2 to 4 As shown, a moving groove is provided at the top of the connecting rod 6, a connecting plate 21 is fixedly installed on the top of the moving rod 10, a pushing rod 22 is fixedly installed at the bottom of the connecting plate 21, a second round protrusion 23 is fixedly installed at the bottom of the pushing rod 22, a second moving block 24 is provided at the bottom of the second round protrusion 23, a compression spring 18 is fixedly installed at the bottom of the second moving block 24, one end of the second moving block 24 passes through one side of the connecting rod 6 and is fixedly installed with a scraper 25, a telescopic rod 26 is fixedly installed at the bottom of the connecting plate 21 and on both sides of the pushing rod 22, a fixed groove is provided at the top of the connecting rod 6 and on both sides of the moving groove, the fixed end of the telescopic rod 26 is located inside the fixed groove, and its bottom is fixedly installed with the fixed groove, the second round protrusion 23 is located at the top of the inclined surface of the second moving block 24, one end of the compression spring 18 is fixedly installed to the inner wall of the moving groove, and the scraper 25 is located at the bottom of the first sealing block 15.

[0037] When the reaction is over, when the first sealing block 15 and the second sealing block 19 are no longer in contact with the inner wall of the sample inlet 4, the connecting plate 21 is moved downward so that the connecting plate 21 contracts the telescopic rod 26 and drives the push rod 22 and the second protrusion 23 to move downward, so that the second protrusion 23 moves along the inclined surface of the second moving block 24 and squeezes the second moving block 24, so that the compression spring 18 is stretched, and the second moving block 24 drives the scraper 25 to move and contact with the inner wall of the sample inlet 4, and then the connecting rod 6 is rotated so that the connecting rod 6 drives the sealing plate 7 and the sealing plug 5 and the scraper 25 to rotate, so that the scraper 25 scrapes off the liquid paraffin adhered to the inner wall of the sample inlet 4 to prevent the liquid paraffin from remaining for a long time from being difficult to clean.

[0038] Working principle: When in use, the sample liquid enters the interior of the reaction tube 1 through the sample inlet 4 through the delivery tube 3 and the connecting tube 2, and 1 ml of liquid paraffin is added to the interior of the reaction tube 1 to prevent the formation of foam. Then the connecting rod 6 drives the sealing plug 5 to be placed inside the sample inlet 4, so that the sealing plate 7 is placed on the top of the sample inlet 4, so that the sealing plug 5 blocks the sample inlet 4, and the sealing plate 7 blocks the top of the sample inlet 4, and then the moving ring 9 is moved downward to compress the connecting spring 17, and the moving rod 10 is moved toward the inside of the fixed block 11 and moves along the inclined surface of the first moving block 12 to squeeze the first moving block 12. When the insertion rod 16 at the bottom of the moving ring 9 is inserted into the slot, the first convex part at the bottom of the moving rod 10 moves to the first moving block 1 2, the bottom end of the inclined surface is formed, so that the movable rod 14 drives the top side of the first sealing block 15 to fit with the inner wall of the annular groove, and the bottom side to fit with the inner wall of the top of the sample inlet 4. When the first sealing block 15 moves to the connection between the sample inlet 4 and the sealing plate 7, the magnetic connection of the magnetic block 20 causes the magnetic blocks 20 to attract each other and drive the second sealing block 19 to move, so that one end of the second sealing block 19 moves along the groove toward the outside of the groove, stretching the second spring, thereby placing the second sealing block 19 between the first sealing block 15, so that the first sealing block 15 and the second sealing block 19 maintain a seal on the connection between the sample inlet 4 and the sealing plate 7. Then, the reaction tube 1 is placed in the corresponding position of the nitrogen determination distillation device, and the steam inlet pipe and other related components are connected, and then the subsequent distillation steps are carried out.

[0039] When the reaction is completed, the movable ring 9 is moved upward to separate the insertion rod 16 from the slot, the connecting spring 17 is stretched, and the movable rod 10 is moved upward to no longer squeeze the first movable block 12. The first movable block 12 and the movable rod 14 are moved to their original positions by the action of the first spring, so that the first sealing block 15 is away from the inner wall of the sample inlet 4. At the same time, the magnetic block 20 is separated, and the second spring is used to move one end of the second sealing block 19 to the inside of the groove, so that the second sealing block 19 no longer fits the inner wall of the sample inlet 4. Then the connecting plate 21 is moved downward so that the connecting plate 21 contracts the telescopic rod 26 and drives The push rod 22 and the second protrusion 23 move downward, so that the second protrusion 23 moves along the inclined surface of the second moving block 24 and squeezes the second moving block 24, so that the compression spring 18 is stretched, and the second moving block 24 drives the scraper 25 to move and fit with the inner wall of the sample inlet 4, and then the connecting rod 6 is rotated, so that the connecting rod 6 drives the sealing plate 7 and the sealing plug 5 and the scraper 25 to rotate, so that the scraper 25 scrapes off the liquid paraffin adhered to the inner wall of the sample inlet 4. After scraping is completed, the connecting rod 6 is moved upward to move the sealing plate 7, the sealing plug 5 and the scraper 25 out of the sample inlet 4, and the reaction tube 1 can be cleaned.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A nitrogen determination distillation device for treating pig farm wastewater, comprising a reaction tube (1), characterized in that: A conveying structure is provided on one side of the reaction tube (1); The conveying structure comprises a connecting tube (2), a conveying tube (3), a sample inlet (4), a sealing plug (5), a connecting rod (6), a sealing plate (7), and a sealing structure. The connecting tube (2) is fixedly installed on one side of the reaction tube (1), the conveying tube (3) is fixedly installed on one side of the connecting tube (2), the sample inlet (4) is provided at the top of the conveying tube (3), a sealing plug (5) is provided inside the sample inlet (4), a connecting rod (6) is fixedly installed on the top of the sealing plug (5), a sealing plate (7) is fixedly installed on one end of the connecting rod (6), the sealing plate (7) is located at the top of the sample inlet (4), and a sealing structure is provided at the bottom of the sealing plate (7) and at the top of the sample inlet (4).

2. The nitrogen determination distillation device for pig farm wastewater treatment according to claim 1, characterized in that: A reaction chamber (8) is provided at the upper end of the reaction tube (1), and a sample liquid is provided inside the reaction tube (1), wherein the sample liquid contains 1 ml of liquid paraffin. The sample inlet (4) and the sealing plug (5) are both trapezoidal in shape, and the sealing structure is distributed in a circular array with the sealing plate (7) at the center.

3. The nitrogen determination distillation device for piggery wastewater treatment according to claim 1, characterized in that: The sealing structure comprises a moving ring (9), a moving rod (10), a fixed block (11), a first moving block (12), a connecting block (13), a first spring, a movable rod (14), and a first sealing block (15). The moving ring (9) is fixedly mounted with the moving rod (10) at the bottom, the sealing plate (7) is fixedly mounted with the fixed block (11), the moving rod (10) passes through the sealing plate (7) and extends to the inside of the fixed block (11), the fixed block (11) is provided with the first moving block (12), both sides of the first moving block (12) are fixedly mounted with connecting blocks (13), one side of the connecting block (13) is fixedly mounted with the first spring, one side of the first spring is fixedly mounted with the inner wall of the fixed block (11), the first moving block (12) is fixedly mounted with the movable rod (14) on the side away from the first spring, and the first sealing block (15) is fixedly mounted on one side of the movable rod (14).

4. The nitrogen determination distillation device for piggery wastewater treatment according to claim 3, characterized in that: The movable ring (9) is located at the top of the sealing plate (7) and at the outside of the connecting rod (6); an insert rod (16) is fixedly installed at the bottom of the movable ring (9); a connecting spring (17) is sleeved on the outside of the insert rod (16); one end of the connecting spring (17) is fixedly installed at the top of the sealing plate (7); a slot is provided at the top of the sealing plate (7); the insert rod (16) is plugged into the slot; the insert rod (16) and the connecting spring (17) are located between the movable rod (10).

5. The nitrogen determination distillation device for treating pig farm wastewater according to claim 3, characterized in that: The bottom of the first movable block (12) is slidably connected to the inner wall of the bottom of the fixed block (11); a first circular protrusion is provided at the bottom end of the movable rod (10); the first movable block (12) is provided with an inclined surface on the side close to the first circular protrusion; the first circular protrusion is located at the bottom end of the inclined surface; an annular groove is provided at the bottom of the sealing plate (7); the movable rod (14) passes through one side of the fixed block (11) and extends to the annular groove; the first sealing block (15) is located in the annular groove, and one side of its bottom end is in contact with the inner wall of the sample inlet (4).

6. The nitrogen determination distillation device for treating piggery wastewater according to claim 3, characterized in that: Both ends of the first sealing block (15) are provided with grooves, a second spring is fixedly installed on the inner wall of the groove, a second sealing block (19) is fixedly installed on one end of the second spring, the bottom of the second sealing block (19) is slidably connected to the groove, a magnetic block (20) is fixedly installed on one side of the second sealing block (19), and the magnetic blocks (20) are magnetically connected to each other.

7. The nitrogen determination distillation device for treating piggery wastewater according to claim 6, characterized in that: The first sealing block (15) is arc-shaped, one end of the second sealing block (19) is located on the inner wall of the groove, and the other end is located outside the groove, and it is located between the two first sealing blocks (15). One side of the second sealing block (19) is in contact with the inner wall of the sample inlet (4), and the first sealing block (15) and the second sealing block (19) are both located at the contact point between the sealing plate (7) and the sample inlet (4).

8. The nitrogen determination distillation device for treating piggery wastewater according to claim 1, characterized in that: A movable groove is provided at the top of the connecting rod (6); a connecting plate (21) is fixedly installed at the top of the movable rod (10); a pushing rod (22) is fixedly installed at the bottom of the connecting plate (21); a second circular protrusion (23) is fixedly installed at the bottom of the pushing rod (22); a second movable block (24) is provided at the bottom of the second circular protrusion (23); a compression spring (18) is fixedly installed at the bottom of the second movable block (24); and a scraper (25) is fixedly installed at one end of the second movable block (24) passing through one side of the connecting rod (6).

9. The nitrogen determination distillation device for treating pig farm wastewater according to claim 8, characterized in that: A telescopic rod (26) is fixedly installed at the bottom of the connecting plate (21) and on both sides of the push rod (22); a fixed groove is opened at the top of the connecting rod (6) and on both sides of the movable groove; the fixed end of the telescopic rod (26) is located inside the fixed groove, and its bottom is fixedly installed with the fixed groove; the second circular protrusion (23) is located at the top of the inclined surface of the second movable block (24); one end of the compression spring (18) is fixedly installed with the inner wall of the movable groove; and the scraper (25) is located at the bottom of the first sealing block (15).

Images