A carbon source automatic dosing device for a denitrification deep bed filter

Abstract

The present invention discloses an automatic carbon source dosing device for a denitrification deep bed filter, and specifically relates to the technical field of sewage treatment. The automatic carbon source dosing device for the denitrification deep bed filter comprises a filter body and a water inlet pipe fixedly installed at the input end of the filter body, a carbon source storage box is fixedly installed on the surface of the filter body, a conveying pipe is fixedly connected to the surface of the carbon source storage box, a feeding assembly is installed at one end of the water inlet pipe away from the filter body, and a liquid infusion tube is installed at one end of the feeding assembly away from the water inlet pipe. The automatic carbon source dosing device for the denitrification deep bed filter of the present invention can utilize the flow of sewage to drive the impeller to rotate, realize the double mixing of the carbon source and the sewage through the feeding assembly, and the carbon source input amount automatically increases when the sewage flow increases, thereby reducing the error of the traditional dosing method and improving the stability and reliability of sewage treatment, and is provided with a pressure regulating assembly, which can adjust the chute pressure to accurately control the carbon source dosage, which is conducive to fully utilizing the carbon source and reducing resource consumption.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to an automatic carbon source dosing device for a denitrification deep bed filter. Background Art

[0002] In the sewage treatment process, the denitrification deep bed filter is a commonly used deep treatment process. Its main purpose is to remove nitrogen pollutants such as nitrate nitrogen in the sewage through denitrification. The denitrification process requires an organic carbon source as an electron donor. However, the natural organic carbon source in the sewage is often not enough to meet the needs of denitrification, so additional carbon sources need to be added.

[0003] Traditional carbon source addition methods are mainly manual operation and simple timed and quantitative addition. When performing timed and quantitative addition, the staff must first comprehensively consider the treatment scale of the denitrification deep bed filter and the daily water quality conditions and other factors to calculate a relatively fixed carbon source addition amount, such as determining the number of kilograms of carbon source to be added per hour, and setting the addition time interval, such as adding once every 2 hours. Subsequently, a simple timing device such as a timer switch is connected to the corresponding dosing device, such as connecting to a small carbon source delivery pump, and performing the carbon source addition operation by controlling the start of the pump. When the set time is reached, the dosing device will start and add carbon according to the pre-set amount. The source is transported to the denitrification deep bed filter to mix with the sewage. During this period, the staff also needs to regularly check the equipment operation status and carbon source addition status to see if there are any abnormalities in order to make corresponding maintenance adjustments. However, this traditional addition method has many disadvantages. It is difficult to dynamically adjust the amount of carbon source added according to the actual sewage flow in the denitrification deep bed filter. Therefore, it is easy for insufficient carbon source addition to affect the denitrification effect, or excessive carbon source addition to lead to waste and may cause other water quality problems, such as excessive effluent COD. In addition, manual operation itself is accompanied by the defects of high labor intensity and low addition accuracy, which is not conducive to the efficient and stable operation of the sewage treatment system.

[0004] Therefore, those skilled in the art provide a carbon source automatic dosing device for a denitrification deep bed filter to solve the problems raised in the above background technology. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an automatic carbon source dosing device for a denitrifying deep bed filter, which solves the problem that traditional manual active dosing or manual operation of equipment to add carbon source cannot accurately adjust the dosage according to the actual sewage flow rate, has the defects of high labor intensity and low dosing accuracy, and is not conducive to the efficient and stable operation of the sewage treatment system.

[0006] In order to realize the above-mentioned ability to utilize the flow of sewage to drive the impeller to rotate, the carbon source and sewage are mixed twice through the feeding component, and the carbon source input amount automatically increases when the sewage flow rate increases, thereby reducing the error of the traditional addition method and improving the stability and reliability of sewage treatment; by setting the feeding component, the carbon source can be sucked and stably enter the sealing component, simplifying the equipment and improving the stability of equipment operation; thirdly, a pressure regulating component is provided, which can adjust the chute pressure to accurately control the carbon source addition amount, which is conducive to making full use of the carbon source and reducing resource consumption. The present invention provides the following technical solutions: a carbon source automatic dosing device for a denitrification deep bed filter, comprising a filter body and a water inlet pipe fixedly installed at the input end of the filter body, a carbon source storage box is fixedly installed on the surface of the filter body, a conveying pipe is fixedly connected to the surface of the carbon source storage box, a feeding component is installed at the end of the water inlet pipe away from the filter body, and a liquid infusion tube is installed at the end of the feeding component away from the water inlet pipe;

[0007] The feeding assembly includes a fixed seat fixedly connected to the end face of the water inlet pipe, a rotating groove is provided inside the fixed seat, a rotating shaft is rotatably connected inside the rotating groove through a fixed bearing, an impeller is fixedly installed on the outer surface of the rotating shaft, a liquid outlet groove, a liquid inlet groove and a liquid passage groove are provided inside the fixed seat, a connecting block is fixedly connected inside the fixed seat, a feeding assembly is installed inside the fixed seat, a fixed disk is fixedly connected to the inner wall of the liquid inlet groove, liquid inlet holes are equidistantly provided on the surface of the fixed disk, grooves are equidistantly provided inside the fixed disk, a sealing assembly is installed inside the groove, a liquid inlet pipe is fixedly connected to the surface of the fixed disk, and a pressure regulating assembly is installed at the input end of the liquid inlet pipe.

[0008] Preferably, the feeding assembly includes a rotating wheel fixedly connected to the top of the rotating shaft, the surface of the rotating wheel is provided with an annular bevel groove, the interior of the fixed seat is longitudinally slidably connected with a connecting rod, the surface of the connecting rod is fixedly connected with a fixing rod, the top of the fixing rod is fixedly connected with a sealing plate, the interior of the fixed seat is provided with a sealing groove, the input end of the liquid inlet pipe is fixedly installed with a first direct current one-way valve, and the output end of the delivery pipe is fixedly installed with a second direct current one-way valve.

[0009] Preferably, the sealing assembly includes a fixed block fixedly connected to the inside of the fixed disk, the inside of the fixed block is provided with through holes equidistantly penetrated, a slide groove is provided at the inner center of the fixed block, the inner sealing sliding connection of the slide groove is connected to a slider, a fixed rod is fixedly connected at the surface center of the slider, the end surface of the fixed rod away from the slider is fixedly connected to the sealing disk, and the inside of the fixed block is fixedly connected to an air duct connected to the inside of the slide groove.

[0010] Preferably, the pressure regulating assembly comprises a sealed cavity opened inside the fixing seat, the sealing cavity is sealingly and slidably connected with an adjusting plate, a threaded ring is fixedly installed inside the fixing seat, and the inner wall of the threaded ring is threadedly connected with bolts.

[0011] Preferably, the interior of the carbon source storage box is connected to the interior of the sealing groove through the delivery pipe and the second direct-flow one-way valve, and the inner top of the sealing groove is connected to the interior of the groove through the first direct-flow one-way valve and the liquid inlet pipe.

[0012] Preferably, an annular groove is provided at the bottom of the connecting block, a liquid outlet hole is provided on the surface of the connecting block, and the interior of the water inlet pipe is connected with the interior of the annular groove through the liquid outlet groove and the liquid outlet hole.

[0013] Preferably, the interior of the annular groove is connected to the interior of the liquid inlet groove through the rotating groove, the liquid flow groove and the liquid inlet groove in sequence, the interior of the connecting rod is penetrated by a limiting rod, the end face of the limiting rod is fixedly connected to the interior of the fixing seat, the end of the connecting rod away from the fixing rod extends to the interior of the annular inclined groove, the rotating wheel is rotatably connected to the interior of the fixing seat, and the connecting rod and the fixing rod are both slidably connected to the interior of the filter tank body.

[0014] Preferably, the interior of the slide groove is connected to the interior of the sealing cavity through an air guide pipe, and the surface of the sealing disk is sealingly attached to the surface of the fixing block and seals the inner left end of the through hole.

[0015] Preferably, the end surface of the bolt is fixedly connected to a limiting disk, and the outer surface of the limiting disk is rotatably connected to the inside of the adjustment plate.

[0016] Preferably, the interior of the lower slide groove and the sealing cavity is normally in a negative pressure state, and one end of the sliding block away from the bolt extends to the outside of the fixing seat.

[0017] Compared with the prior art, the present invention provides a carbon source automatic dosing device for a denitrification deep bed filter, which has the following beneficial effects:

[0018] 1. The automatic carbon source dosing device of the denitrification deep bed filter is provided with a feeding component. Before the sewage enters the filter body, the flow of sewage drives the impeller to rotate, and the carbon source inside the carbon source storage box is automatically drawn into the interior of the groove through the delivery pipe through the feeding component, and flows out through the sealing component, and can be mixed with the sewage flowing out through the liquid inlet hole for the first time. The mixed sewage can be mixed for the second time through the rotation of the impeller, and when the sewage flow rate increases, the input amount of the carbon source will also automatically increase, reducing the errors that are easy to occur in the traditional method of adding carbon sources, and also reducing the adverse effects on the denitrification reaction caused by untimely or inaccurate manual operation, thereby improving the stability and reliability of the sewage treatment process.

[0019] 2. The automatic carbon source dosing device of the denitrification deep bed filter is provided with a feeding assembly. When the impeller drives the runner to rotate through the rotating shaft, the connection between the runner and the connecting rod can drive the sealing plate to slide back and forth inside the sealing groove, and cooperate with the second direct current one-way valve and the first direct current one-way valve to suck the carbon source, so that the carbon source can stably enter the interior of the sealing assembly, thereby enhancing stability. Moreover, this linkage structure makes it unnecessary to separately set up a water pump or other driving structure for the transportation of the carbon source, thereby simplifying the composition of the equipment. The relatively simple linkage structure improves the reliability and stability of the equipment, thereby enabling the carbon source transportation system to operate more stably.

[0020] 3. The automatic carbon source dosing device of the denitrification deep bed filter can adjust the pressure inside the chute by setting a pressure regulating component, and can further accurately control the amount of carbon source added. Accurate carbon source addition can make full use of the carbon source and reduce unnecessary resource consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of a carbon source automatic dosing device for a denitrification deep bed filter proposed by the present invention;

[0022] Figure 2 It is a cross-sectional view of a feeding component in a carbon source automatic feeding device for a denitrification deep bed filter proposed by the present invention;

[0023] Figure 3 A cross-sectional view of a fixed disk in a carbon source automatic dosing device for a denitrification deep bed filter proposed by the present invention;

[0024] Figure 4 for Figure 2 The enlarged view of point A in the middle;

[0025] Figure 5 This is a schematic diagram of the connection between the rotor and the connecting rod in the carbon source automatic dosing device of the denitrification deep bed filter proposed by the present invention;

[0026] Figure 6 This is a structural schematic diagram of a connecting block in a carbon source automatic dosing device for a denitrification deep bed filter proposed by the present invention;

[0027] Figure 7 This is a schematic structural diagram of a sealing component in a carbon source automatic dosing device for a denitrification deep bed filter proposed by the present invention;

[0028] Figure 8 for Figure 2 The enlarged view of point B in the middle;

[0029] Fig. 9The present invention provides a schematic diagram of the connection between bolts and a limiting plate in a carbon source automatic dosing device for a denitrification deep bed filter.

[0030] In the figure: 1, filter tank body; 2, water inlet pipe; 3, carbon source storage box; 4, delivery pipe; 5, feeding assembly; 51, fixed seat; 52, rotating groove; 53, rotating shaft; 54, impeller; 55, liquid outlet groove; 56, liquid inlet groove; 561, liquid passage groove; 57, connecting block; 571, annular groove; 572, liquid outlet hole; 58, feeding assembly; 581, rotating wheel; 582, annular inclined groove; 583, connecting rod; 5831, limiting rod; 584, fixing rod; 585, sealing plate; 586, sealing groove; 587, first Direct-current one-way valve; 588, second direct-current one-way valve; 59, fixed disk; 510, liquid inlet hole; 511, sealing assembly; 5111, fixed block; 5112, through hole; 5113, slide groove; 5114, slider; 5115, fixed rod; 5116, sealing disk; 5117, air guide tube; 512, groove; 513, liquid inlet pipe; 514, pressure regulating assembly; 5141, sealing chamber; 5142, adjusting plate; 5143, threaded ring; 5144, bolt; 51441, limit disk; 6, infusion tube. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] For example, see Figure 1-Figure 7 , a carbon source automatic dosing device for a denitrification deep bed filter, comprising a filter body 1 and a water inlet pipe 2 fixedly installed at the input end of the filter body 1, a carbon source storage box 3 fixedly installed on the surface of the filter body 1, a delivery pipe 4 fixedly connected to the surface of the carbon source storage box 3, a feeding assembly 5 installed at one end of the water inlet pipe 2 away from the filter body 1, and a liquid delivery pipe 6 installed at one end of the feeding assembly 5 away from the water inlet pipe 2;

[0033] The feeding assembly 5 includes a fixed seat 51 fixedly connected to the end face of the water inlet pipe 2, a rotating groove 52 is provided inside the fixed seat 51, a rotating shaft 53 is rotatably connected inside the rotating groove 52 through a fixed bearing, an impeller 54 is fixedly installed on the outer surface of the rotating shaft 53, a liquid outlet groove 55, a liquid inlet groove 56 and a liquid passage groove 561 are provided inside the fixed seat 51, a connecting block 57 is fixedly connected inside the fixed seat 51, a feeding assembly 58 is installed inside the fixed seat 51, a fixed plate 59 is fixedly connected to the inner wall of the liquid inlet groove 56, a liquid inlet hole 510 is equidistantly provided on the surface of the fixed plate 59, grooves 512 are equidistantly provided inside the fixed plate 59, a sealing assembly 511 is installed inside the groove 512, a liquid inlet pipe 513 is fixedly connected to the surface of the fixed plate 59, and the liquid inlet pipe 513 is A pressure regulating component 514 is installed at the inlet end. By setting the feeding component 5, before the sewage enters the filter tank body 1, the flow of sewage drives the impeller 54 to rotate, and the carbon source inside the carbon source storage box 3 is automatically drawn into the interior of the groove 512 through the conveying pipe 4 through the feeding component 58, and flows out through the sealing component 511, and can be mixed with the sewage flowing out through the liquid inlet hole 510 for the first time. The mixed sewage can be mixed for the second time through the rotation of the impeller 54, and when the sewage flow rate increases, the input amount of the carbon source will also automatically increase, reducing the errors that are easy to occur in the traditional method of adding carbon source, and also reducing the adverse effects on the denitrification reaction caused by untimely or inaccurate manual operation, thereby improving the stability and reliability of the sewage treatment process.

[0034] The feeding assembly 58 includes a rotating wheel 581 fixedly connected to the top of the rotating shaft 53, an annular inclined groove 582 is provided on the surface of the rotating wheel 581, a connecting rod 583 is longitudinally slidably connected inside the fixed seat 51, a fixing rod 584 is fixedly connected to the surface of the connecting rod 583, a sealing plate 585 is fixedly connected to the top of the fixing rod 584, a sealing groove 586 is provided inside the fixed seat 51, a first direct current check valve 587 is fixedly installed at the input end of the liquid inlet pipe 513, and a second direct current check valve 588 is fixedly installed at the output end of the delivery pipe 4. By setting the feeding assembly 58, when the impeller 54 passes through the rotating shaft 53 When the wheel 581 is driven to rotate, due to the connection between the wheel 581 and the connecting rod 583, the sealing plate 585 can be driven to slide back and forth inside the sealing groove 586, and the carbon source can be sucked in cooperation with the second direct current one-way valve 588 and the first direct current one-way valve 587, so that the carbon source can stably enter the sealing component 511, thereby enhancing stability. Moreover, this linkage structure eliminates the need for a separate water pump or other driving structure to transport the carbon source, thereby simplifying the composition of the equipment. The relatively simple linkage structure improves the reliability and stability of the equipment, thereby enabling the carbon source transport system to operate more stably.

[0035] The sealing assembly 511 includes a fixed block 5111 fixedly connected to the inside of the fixed plate 59, the fixed block 5111 is provided with through holes 5112 equidistantly penetrated therein, a slide groove 5113 is provided at the inner center of the fixed block 5111, the inner sealing sliding connection of the slide groove 5113 is connected to a slider 5114, a fixed rod 5115 is fixedly connected at the surface center of the slider 5114, the end face of the fixed rod 5115 away from the slider 5114 is fixedly connected to a sealing plate 5116, the inner part of the fixed block 5111 is fixedly connected to an air duct 5117 connected to the inside of the slide groove 5113, and by setting the sealing assembly 5111, the sealing plate 5116 can slide to seal the left end of the through hole 5112 when no addition is needed, so as to prevent sewage from flowing back into the carbon source storage box 3.

[0036] The interior of the carbon source storage box 3 is connected to the interior of the sealing groove 586 through the delivery pipe 4 and the second direct-flow one-way valve 588. The inner top of the sealing groove 586 is connected to the interior of the groove 512 through the first direct-flow one-way valve 587 and the liquid inlet pipe 513. The carbon source can be sucked through the cooperation of 588 and the first direct-flow one-way valve 587.

[0037] An annular groove 571 is provided at the bottom of the connecting block 57, and a liquid outlet hole 572 is provided on the surface of the connecting block 57. The interior of the water inlet pipe 2 is connected with the interior of the annular groove 571 through the liquid outlet groove 55 and the liquid outlet hole 572 in sequence. By providing the liquid outlet hole 572 and the annular groove 571, sewage can flow normally into the interior of the liquid outlet groove 55.

[0038] The interior of the annular groove 571 is connected to the interior of the liquid inlet groove 56 through the rotating groove 52 and the liquid passing groove 561. The interior of the connecting rod 583 passes through and is connected to the limiting rod 5831. The end face of the limiting rod 5831 is fixedly connected to the interior of the fixed seat 51. The end of the connecting rod 583 away from the fixing rod 584 extends to the interior of the annular inclined groove 582. The rotating wheel 581 is rotatably connected to the interior of the fixed seat 51. The connecting rod 583 and the fixing rod 584 are both slidably connected to the interior of the filter tank body 1. By setting the limiting rod 5831, the longitudinal sliding of the connecting rod 583 can be limited, thereby enhancing the sliding stability of the connecting rod 583.

[0039] For example 2, please refer to Figure 2 , Figure 8 and Fig. 9The pressure regulating component 514 includes a sealed chamber 5141 opened inside the fixed seat 51, the sealed chamber 5141 is sealed and slidably connected with an adjusting plate 5142, a threaded ring 5143 is fixedly installed inside the fixed seat 51, and a bolt 5144 is threadedly connected to the inner wall of the threaded ring 5143. By setting the pressure regulating component 514, the pressure inside the slide groove 5113 can be adjusted, and the amount of carbon source added can be further accurately controlled. Accurate carbon source addition can make full use of the carbon source and reduce unnecessary resource consumption.

[0040] The interior of the slide 5113 is connected to the interior of the sealing cavity 5141 through the air duct 5117. The surface of the sealing disk 5116 is sealed to the surface of the fixed block 5111 and seals the inner left end of the through hole 5112. Since the surface of the sealing disk 5116 is sealed to the surface of the fixed block 5111, sewage backflow can be avoided.

[0041] The end face of the bolt 5144 is fixedly connected to the limit plate 51441, and the outer surface of the limit plate 51441 is rotatably connected to the inside of the adjustment plate 5142. By setting the bolt 5144, when the bolt 5144 is rotated, the adjustment plate 5142 can be driven to slide, thereby preventing the adjustment plate 5142 from rotating inside the sealing chamber 5141, causing the adjustment plate 5142 to wear and affect the sealing inside the sealing chamber 5141.

[0042] Normally, the interior of the slide groove 5113 and the sealing chamber 5141 are in a negative pressure state, and the end of the slider 5114 away from the bolt 5144 extends to the outside of the fixed seat 51. Since the end of the slider 5114 away from the bolt 5144 extends to the outside of the fixed seat 51, it is convenient to rotate the bolt 5144 and adjust the pressure inside the slide groove 5113 and the sealing chamber 5141.

[0043] To sum up, when the automatic carbon source dosing device of the denitrification deep bed filter is in use, the sewage first enters the liquid inlet tank 56 through the liquid infusion pipe 6 and then enters the rotating tank 52 through the liquid tank 561, and drives the impeller 54 to rotate, and then the impeller 54 drives the rotating wheel 581 to rotate through the rotating shaft 53. At this time, the annular inclined groove 582 and the connecting rod 583 are connected to drive the connecting rod 583 to slide up and down, and the connecting rod 583 drives the fixing rod 584 and the sealing plate 585 to slide up and down in the sealing groove 586. When the sealing plate 585 slides upward, the second direct current one-way valve 588 is in a closed state, and the first direct current one-way valve 587 is in an open state. When the sealing plate 585 slides downward, the second direct current one-way valve 588 is in an open state, and the carbon source inside the carbon source storage box 3 is sucked into the sealing tank through the delivery pipe 4. Inside the groove 586, the first direct-flow one-way valve 587 is in a closed state. When the sealing plate 585 slides upward again, the second direct-flow one-way valve 588 is in a closed state. The carbon source liquid inside the sealing groove 586 enters the liquid inlet pipe 513 through the first direct-flow one-way valve 587 and the liquid inlet pipe 513. At this time, the pressure inside the groove 512 increases, and the slider 5114 is driven to slide to the left through the sealing disk 5116 and the fixed rod 5115. When the surface of the sealing disk 5116 does not contact the surface of the fixed block 5111, the carbon source liquid flows out from the inside of the fixed block 5111 through the through hole 5112, and is mixed with the sewage flowing out through the liquid inlet hole 510 for the first time. The mixed sewage can also be mixed for a second time through the rotation of the impeller 54, and when the sewage flow rate increases, the input amount of the carbon source will also automatically increase;

[0044] When it is necessary to adjust the amount of carbon source input, the bolt 5144 is turned. At this time, the bolt 5144 drives the adjustment plate 5142 to slide to the right through the limit plate 51441. At the same time, the negative pressure inside the sealing chamber 5141 and the slide groove 5113 increases, and the resistance of the sealing plate 5116 to slide to the left becomes larger. Therefore, the amount of carbon source added can be further accurately controlled.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A carbon source automatic dosing device for a denitrification deep bed filter, comprising a filter body (1) and a water inlet pipe (2) fixedly installed at the input end of the filter body (1), characterized in that: A carbon source storage box (3) is fixedly mounted on the surface of the filter tank body (1), a delivery pipe (4) is fixedly connected to the surface of the carbon source storage box (3), a feeding assembly (5) is mounted on the end of the water inlet pipe (2) away from the filter tank body (1), and a liquid delivery pipe (6) is mounted on the end of the water inlet pipe (5) away from the water inlet pipe (2); The feeding assembly (5) comprises a fixed seat (51) fixedly connected to the end surface of the water inlet pipe (2); a rotating groove (52) is provided inside the fixed seat (51); a rotating shaft (53) is rotatably connected inside the rotating groove (52) via a fixed bearing; an impeller (54) is fixedly mounted on the outer surface of the rotating shaft (53); a liquid outlet groove (55), a liquid inlet groove (56) and a liquid passage groove (561) are provided inside the fixed seat (51); a connecting block (57) is fixedly connected inside the fixed seat (51); A feeding assembly (58) is installed inside the fixing seat (51); a fixing plate (59) is fixedly connected to the inner wall of the liquid inlet groove (56); liquid inlet holes (510) are equidistantly provided on the surface of the fixing plate (59); grooves (512) are equidistantly provided inside the fixing plate (59); a sealing assembly (511) is installed inside the groove (512); a liquid inlet pipe (513) is fixedly connected to the surface of the fixing plate (59); and a pressure regulating assembly (514) is installed at the input end of the liquid inlet pipe (513); The feeding assembly (58) comprises a rotating wheel (581) fixedly connected to the top of the rotating shaft (53); the surface of the rotating wheel (581) is provided with an annular inclined groove (582); a connecting rod (583) is longitudinally slidably connected inside the fixing seat (51); a fixing rod (584) is fixedly connected to the surface of the connecting rod (583); a sealing plate (585) is fixedly connected to the top of the fixing rod (584); a sealing groove (586) is provided inside the fixing seat (51); a first direct-flow check valve (587) is fixedly installed at the input end of the liquid inlet pipe (513); a second direct-flow check valve (588) is fixedly installed at the output end of the delivery pipe (4); and the top end of the sealing groove (586) is connected to the inside of the groove (512) via the first direct-flow check valve (587) and the liquid inlet pipe (513); The sealing assembly (511) comprises a fixed block (5111) fixedly connected to the inside of a fixed disk (59); the inside of the fixed block (5111) is provided with through holes (5112) equidistantly extending therethrough; a slide groove (5113) is provided at the center of the inside of the fixed block (5111); a slider (5114) is sealingly and slidably connected to the inside of the slide groove (5113); a fixed rod (5115) is fixedly connected to the center of the surface of the slider (5114); an end surface of the fixed rod (5115) away from the slider (5114) is fixedly connected to a sealing disk (5116); an air guide tube (5117) connected to the inside of the slide groove (5113) is fixedly connected to the inside of the fixed block (5111); the inside of the slide groove (5113) is connected to the inside of the sealing cavity (5141) via the air guide tube (5117); The pressure regulating assembly (514) comprises a sealed cavity (5141) opened inside the fixing seat (51), and the interior of the lower slide groove (5113) and the sealed cavity (5141) are normally in a negative pressure state.

2. The carbon source automatic dosing device for a denitrification deep bed filter according to claim 1, characterized in that: The sealing cavity (5141) is sealingly and slidably connected to an adjusting plate (5142), a threaded ring (5143) is fixedly installed inside the fixing seat (51), a bolt (5144) is threadedly connected to the inner wall of the threaded ring (5143), and an end of the sliding block (5114) away from the bolt (5144) extends to the outside of the fixing seat (51).

3. The carbon source automatic dosing device for a denitrification deep bed filter according to claim 1, characterized in that: The interior of the carbon source storage box (3) is connected to the interior of the sealing groove (586) via the delivery pipe (4) and the second straight-flow type one-way valve (588).

4. The carbon source automatic dosing device for a denitrification deep bed filter according to claim 1, characterized in that: The bottom of the connecting block (57) is provided with an annular groove (571), the surface of the connecting block (57) is provided with a liquid outlet hole (572), and the interior of the water inlet pipe (2) is connected to the interior of the annular groove (571) via the liquid outlet groove (55) and the liquid outlet hole (572).

5. The carbon source automatic dosing device for a denitrification deep bed filter according to claim 4, characterized in that: The interior of the annular groove (571) is connected to the interior of the liquid inlet groove (56) via the rotating groove (52) and the liquid passing groove (561) in sequence; the interior of the connecting rod (583) is penetrated and connected with a limiting rod (5831); the end surface of the limiting rod (5831) is fixedly connected to the interior of the fixing seat (51); one end of the connecting rod (583) away from the fixing rod (584) extends to the interior of the annular inclined groove (582); the rotating wheel (581) is rotatably connected to the interior of the fixing seat (51); and the connecting rod (583) and the fixing rod (584) are both slidably connected to the interior of the filter tank body (1).

6. The carbon source automatic dosing device for a denitrification deep bed filter according to claim 1, characterized in that: The surface of the sealing disk (5116) is sealingly attached to the surface of the fixing block (5111), and seals the inner left end of the through hole (5112).

7. The carbon source automatic dosing device for a denitrification deep bed filter according to claim 2, characterized in that: The end surface of the bolt (5144) is fixedly connected to a limiting plate (51441), and the outer surface of the limiting plate (51441) is rotatably connected to the inside of the adjustment plate (5142).

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