Domestic sewage treatment device with pre-denitrification deep-bed biological filter

Abstract

The utility model discloses a pre-denitrification deep-bed biological filter domestic sewage treatment device which comprises a tank body, a sedimentation tank and a deep-bed biological filter are arranged in the tank body, the sedimentation tank and the deep-bed biological filter are separated by a vertically arranged partition plate, a water inlet is formed between the upper end of the partition plate and the inner wall of the tank body, and a water outlet is formed between the upper end of the partition plate and the inner wall of the tank body. The sedimentation tank is communicated with the deep-bed biological filter tank through a water inlet; a first water inlet pipe is arranged below the side wall of the sedimentation tank, and a drainage pipe is arranged at the bottom of the deep-bed biological filter tank. According to the utility model, the sedimentation tank and the denitrification deep-bed biological filter are integrated, so that the influence of the filtering flow direction on the filtering effect is fully exerted, the filtering effect is improved, the space is fully utilized, the occupied area is small, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment field especially relates to a front denitrification deep bed biological filter domestic sewage treatment device. BACKGROUND

[0002] Deep bed filter is usually used for the removal of suspended solids in water treatment, single layer homogeneous filter material or multi-layer filter material filter, filter bed is relatively deeper than traditional block filter, and is mostly downflow gravity filter. The filter material is usually natural quartz sand, the multi-layer filter material is anthracite, quartz sand and garnet, etc. The particle size of each filter material is arranged in the order of small at the top and large at the bottom. The deep bed filter also has the function of denitrification and nitrogen removal by synchronously removing suspended solids and nitrate, with proper design of hydraulic load and nitrate volume load.

[0003] The existing domestic sewage treatment device, when working, sewage first enters the sedimentation tank to filter sludge and other impurities, and then enters the biological filter to perform biological filtration. The sedimentation tank and the biological filter are two independent monomers, which occupy a large area, and the existing sewage treatment needs hydraulic lifting, consumes energy and has low treatment efficiency. UTILITY MODEL CONTENT

[0004] The utility model discloses a front denitrification deep bed biological filter domestic sewage treatment device, which solves the technical problems of large area occupation, high energy consumption and low treatment efficiency of the sewage treatment device in the prior art.

[0005] To achieve the above-mentioned utility model purposes, the technical scheme of the utility model is as follows:

[0006] A front denitrification deep bed biological filter domestic sewage treatment device, comprising a tank body, a sedimentation tank and a deep bed biological filter are arranged in the tank body, the sedimentation tank and the deep bed biological filter are separated by a vertically arranged partition plate, a water inlet is formed between the upper end of the partition plate and the inner wall of the tank body, and the sedimentation tank and the deep bed biological filter are communicated through the water inlet; a first water inlet pipe is arranged below the side wall of the sedimentation tank, and a drain pipe is arranged at the bottom of the deep bed biological filter. The sedimentation tank and the denitrification deep bed biological filter are integrated, which not only fully utilizes the influence of the filtration flow on the filtration effect, improves the nitrogen removal capacity of the denitrification filter, but also fully utilizes the space, has small area occupation and reduces the cost.

[0007] Preferably, filter bricks are arranged at the bottom of the deep bed biological filter, a porous filter material support plate is horizontally arranged above the filter bricks, and a layer of pebbles, a layer of quartz sand are sequentially arranged above the porous filter material support plate from bottom to top.

[0008] As preferred, the deep bed biofilter is provided with a backwashing mechanism and a backwashing air mechanism; the backwashing mechanism comprises a backwashing main pipe and a backwashing water pump, the backwashing main pipe is located at the bottom of the deep bed biofilter and one end thereof is communicated with the external backwashing water pump after penetrating out of the deep bed biofilter, a plurality of horizontally arranged backwashing branch pipes are uniformly and spacedly communicated on the backwashing main pipe, and a backwashing head is uniformly and spacedly arranged on each backwashing branch pipe; the backwashing air mechanism comprises a backwashing air pipe and a blower, the backwashing air pipe is arranged opposite to the backwashing main pipe and one end thereof is communicated with the external blower after penetrating out of the deep bed biofilter, a plurality of horizontally arranged exhaust pipes are uniformly and spacedly communicated on the backwashing air pipe, and an exhaust hole is formed on each exhaust pipe, and the backwashing branch pipe and the exhaust pipe are staggered arranged; the filter brick is arranged above the backwashing branch pipe and the exhaust pipe. When the backwashing mechanism and the backwashing air mechanism work simultaneously, the water flow and the air flow discharged can be uniformly distributed on the lower surface of the filter assembly, so that the fluid flow speed is uniform and stable, and the impurities on the upper surface of the filter material can be completely and easily flushed out, so that the whole deep bed biofilter can reach a good dynamic balance state when water is fed and discharged. Since the backwashing mechanism and the backwashing air mechanism are uniformly arranged, one of them can also be selected according to requirements.

[0009] As preferred, the deep bed biofilter is provided with a stirring mechanism, the stirring mechanism comprises a cylinder, a fixed plate and a plurality of rake teeth, the fixed plate is located above the quartz sand layer, a guide groove is arranged on each of the pair of opposite inner side walls of the deep bed biofilter, and the fixed plate is slidingly arranged in the guide groove, the cylinder is horizontally arranged outside the deep bed biofilter, the piston rod of the cylinder is fixedly connected with the fixed plate, and the plurality of rake teeth are uniformly and spacedly arranged along the length direction of the fixed plate and embedded in the quartz sand layer. The cylinder drives the fixed plate to move, so that the rake teeth continuously roll the quartz sand, the contact effect of the quartz sand and the backwashing water is better, and the quartz sand collides with each other to accelerate the falling of the blocked impurities, which is convenient for subsequent sewage purification effect.

[0010] As preferred, the sedimentation tank is sequentially provided with a inclined pipe filler and a suspended ball filler from bottom to top, and the sedimentation tank is horizontally provided with an adjusting net plate, and the suspended filler ball is located above the adjusting net plate. The adjusting net plate can not only block the impurities in the sedimentation tank, but also limit the flow of the suspended filler ball in a certain space, which is convenient for centralized management.

[0011] As preferred, the inner side wall of the sedimentation tank is oppositely provided with sliding blocks, the adjusting screen plate is provided with sliding grooves matched with the sliding blocks, the upper portion of the sedimentation tank is provided with a winch, and the winch is connected with the adjusting screen plate through a steel wire rope; and the top of the sedimentation tank is provided with a feeding port. The winch drives the adjusting screen plate to move, when the adjusting screen plate moves downward, the space is increased to accommodate more suspended filler balls, and when the adjusting screen plate moves upward, the suspended filler balls can be driven to the feeding port, so that the suspended filler balls can be increased or decreased at any time, and the applicability of the sedimentation tank is improved.

[0012] As preferred, the inlet is provided with a gate, and the top of the deep-bed biofilter is provided with a second water inlet pipe. According to the water treatment requirement, the gate can be opened or closed, when the gate is opened, the domestic sewage is sequentially treated by the sedimentation tank and the deep-bed biofilter, and when the gate is closed, the domestic sewage is directly treated by the deep-bed biofilter through the second water inlet pipe.

[0013] As preferred, the bottom of the sedimentation tank is provided with a slope located below the first water inlet pipe, a sludge sedimentation area is formed between the slope and the bottom of the sedimentation tank, a sludge discharge pipe is arranged in the sludge sedimentation area, and one end of the sludge discharge pipe is communicated with a sludge discharge pump after penetrating out of the sedimentation tank. The slope can guide the sludge to the sludge sedimentation area, and the sludge can be conveniently discharged.

[0014] The beneficial effects of the present application are as follows:

[0015] 1. The sedimentation tank and the denitrification deep-bed biofilter are integrated in the present application, when the gate is opened, not only the filtering flow direction fully plays a role in the filtering effect, but also the overall denitrification capacity of the denitrification deep-bed biofilter is improved, the space is fully utilized, the land occupation is small, the cost is reduced, the domestic sewage directly flows, no hydraulic lifting is needed, no energy consumption is generated, and the treatment efficiency is high, when the gate is closed, the domestic sewage is directly treated by the denitrification deep-bed biofilter through the second water inlet pipe, and the sewage treatment time is shortened.

[0016] 2. The adjusting screen plate is driven to move by the winch in the present application, when the adjusting screen plate moves downward, the space is increased to accommodate more suspended filler balls, and when the adjusting screen plate moves upward, the suspended filler balls can be driven to the feeding port, so that the suspended filler balls can be increased or decreased at any time, and the applicability of the sedimentation tank is improved.

[0017] 3. The fixed plate is driven to move by the air cylinder in the present application, so that the rake teeth continuously roll the quartz sand, the contact effect of the quartz sand and the backwashing water is better, the quartz sand collides with each other, the blocked impurities are accelerated to fall off, and the subsequent sewage purification effect is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The present application is a structural schematic view.

[0019] Figure 2 This is a schematic diagram of the backwashing mechanism and the backwash air mechanism.

[0020] Figure 3 This is a schematic diagram of the material feeding mechanism.

[0021] In the picture:

[0022] 1. Tank body; 11. Baffle plate; 12. Inlet; 13. Gate; 2. Sedimentation tank; 21. First inlet pipe; 22. Inclined tube packing; 23. Suspended ball packing; 24. Adjusting mesh plate; 25. Sliding block; 26. Feeding port; 27. Sludge sedimentation zone; 28. Slope; 3. Deep bed biological filter; 31. Second inlet pipe; 32. Drainage pipe; 33. Pebble layer; 34. Quartz sand layer; 4. Filter brick; 41. Porous filter media support plate; 5. Backwashing mechanism; 51. Backwashing main pipe; 52. Backwashing water pump; 53. Backwashing branch pipe; 54. Backwashing head; 6. Backwashing air mechanism; 61. Backwashing air pipe; 62. Blower; 63. Exhaust pipe; 7. Material feeding mechanism; 71. Cylinder; 72. Fixing plate; 73. Rake teeth; 8. Sludge pump; 81. Sludge pipe; 9. Winch. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will now be clearly and completely described with reference to the accompanying drawings.

[0024] The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] Example 1

[0026] like Figure 1 As shown, a pre-denitrification deep bed biological filter domestic sewage treatment device includes a tank body 1, in which a sedimentation tank 2 and a deep bed biological filter 3 are arranged, and the sedimentation tank 2 and the deep bed biological filter 3 are separated by a vertically arranged partition 11, and an inlet 12 is formed between the upper end of the partition 11 and the inner wall of the tank body 1. The sedimentation tank 2 and the deep bed biological filter 3 are connected through the inlet 12, and a gate 13 is provided at the inlet 12.

[0027] like Figure 1As shown in the drawings, the first water inlet pipe 21 is arranged on one side of the sedimentation tank 2 away from the deep bed biofilter 3, a slope 28 is arranged above the first water inlet pipe 21, a sludge sedimentation area 27 is formed between the slope 28 and the bottom of the sedimentation tank 2, a sludge discharge pipe 81 is arranged in the sludge sedimentation area 27, and one end of the sludge discharge pipe 81 is connected with a sludge discharge pump 8 after penetrating out of the sedimentation tank 2. The inclined pipe filler 22, the adjusting net plate 24 and the suspended ball filler 23 are sequentially arranged in the sedimentation tank 2 from bottom to top, the adjusting net plate 24 is horizontally arranged and is suitable for separating the inclined pipe filler 22 and the suspended ball filler 23. The sliding blocks 25 are vertically arranged on the pair of opposite inner side walls of the sedimentation tank 2, the sliding grooves which are slidably connected with the sliding blocks 25 are arranged on the adjusting net plate 24, the winch 9 is arranged above the sedimentation tank 2, and the winch 9 is connected with the adjusting net plate 24 through the steel wire rope 28. The feeding port 26 is arranged on the top of the sedimentation tank 2, and the suspended ball filler 23 is added from the feeding port 26.

[0028] As shown in the drawings, Figure 1 and Figure 2 The second water inlet pipe 31 is arranged above the deep bed biofilter 3, and the drain pipe 32 is arranged at the bottom of the deep bed biofilter 3. The backwashing mechanism 5 and the backwashing air mechanism 6 are arranged in the deep bed biofilter 3. The backwashing mechanism 5 comprises the backwashing main pipe 51 and the backwashing water pump 52. The backwashing main pipe 51 is arranged at the bottom of the deep bed biofilter 3 and is connected with the external backwashing water pump 52 after penetrating out of the deep bed biofilter 3. A plurality of horizontally arranged backwashing branch pipes 53 are uniformly and intermittently connected with the backwashing main pipe 51. The backwashing head 54 is uniformly and intermittently arranged on each backwashing branch pipe 53. The backwashing air mechanism 6 comprises the backwashing air pipe 61 and the air blower 62. The backwashing air pipe 61 is arranged opposite to the backwashing main pipe 51 and is connected with the external air blower 62 after penetrating out of the deep bed biofilter 3. A plurality of horizontally arranged exhaust pipes 63 are uniformly and intermittently connected with the backwashing air pipe 61. The exhaust hole is arranged on each exhaust pipe 63. The backwashing branch pipe 53 and the exhaust pipe 63 are arranged alternately. The filter brick 4 is arranged on the bottom of the deep bed biofilter 3 and crosses the backwashing branch pipe 53 and the exhaust pipe 63. The porous filter material support plate 41 is horizontally arranged above the filter brick 4. The goose eggstone layer 33 and the quartz sand layer 34 are sequentially arranged above the porous filter material support plate 41 from bottom to top.

[0029] As shown in the drawings, Figure 1 and Figure 3 The raking mechanism 7 is arranged above the quartz sand layer 34. The raking mechanism 7 comprises the air cylinder 71, the fixed plate 72 and a plurality of rake teeth 73. The guide slot is arranged on the pair of opposite inner side walls of the deep bed biofilter 3. The two ends of the fixed plate 72 are slidably arranged in the guide slot. The plurality of rake teeth 73 are uniformly and intermittently distributed along the length direction of the fixed plate 72, and the lower end of the rake tooth 73 is embedded in the quartz sand layer 34. The air cylinder 71 is horizontally arranged outside the deep bed biofilter 3, and the piston rod of the air cylinder 71 is fixedly connected with the fixed plate 72 after penetrating into the deep bed biofilter 3.

[0030] In summary,

[0031] When the domestic sewage treatment device is used, first, the gate 13 is opened, the domestic sewage enters the sedimentation tank 2 from the first water inlet pipe 21, the sludge is deposited into the sludge deposition area 27 through the inclined pipe filler 22, then the sewage passes through the adjusting screen plate 24 and is treated by the suspended ball filler 23; the treated sewage enters the deep bed biological filter 3 from the water inlet 12, and then passes through the quartz sand layer 34 and the pebble layer 33 to filter out the impurities such as particles in the sewage, and then passes through the filter brick 4 to filter the clean water, and then the clean water is discharged from the drain pipe 32.

[0032] When the gate 13 is closed, the domestic sewage can also directly enter the deep bed biological filter 3 from the second water inlet pipe 31 to perform denitrification treatment.

[0033] When the pebble layer 33 and the quartz sand layer 34 need to be backwashed, the backwashing mechanism 5 can be selected to be water-washed or the backwashing air mechanism 6 can be selected to be air-washed, or the water-washed and air-washed combined backwashing can be selected.

[0034] When the suspended ball filler 23 needs to be added, the winch 9 drives the adjusting screen plate 24 to move downward to increase the containing space of the suspended ball filler 23; when the suspended ball filler 23 needs to be replaced, the winch 9 drives the adjusting screen plate 24 to move upward to drive the suspended ball filler 23 to move to the feeding port 26, and then the suspended ball filler 23 is conveniently taken out.

[0035] The described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

Claims

1. A front denitrification deep bed biofilter domestic sewage treatment device, comprising a pool body, characterized in that, a sedimentation tank and a deep bed biofilter are arranged in the pool body, the sedimentation tank and the deep bed biofilter are separated by a vertically arranged partition, a water inlet is formed between the upper end of the partition and the inner wall of the pool body, and the sedimentation tank and the deep bed biofilter are communicated through the water inlet; a first water inlet pipe is arranged below the side wall of the sedimentation tank, and a drain pipe is arranged at the bottom of the deep bed biofilter.

2. The front denitrification deep bed biofilter domestic sewage treatment device according to claim 1, characterized in that, filter bricks are laid at the bottom of the deep bed biofilter, a porous filter material support plate is horizontally arranged above the filter bricks, and from bottom to top, a layer of pebbles and a layer of quartz sand are sequentially laid above the porous filter material support plate.

3. The front denitrification deep bed biofilter domestic sewage treatment device according to claim 2, characterized in that, a backwashing mechanism and a backwashing gas mechanism are arranged in the deep bed biofilter; the backwashing mechanism comprises a backwashing main pipe and a backwashing water pump, the backwashing main pipe is located at the bottom of the deep bed biofilter, one end of the backwashing main pipe penetrates out of the deep bed biofilter and is communicated with the external backwashing water pump, a plurality of horizontally arranged backwashing branch pipes are uniformly and intermittently communicated on the backwashing main pipe, and a backwashing head is uniformly and intermittently arranged on each backwashing branch pipe; the backwashing gas mechanism comprises a backwashing gas pipe and a blower, the backwashing gas pipe is arranged opposite to the backwashing main pipe, one end of the backwashing gas pipe penetrates out of the deep bed biofilter and is communicated with the external blower, a plurality of horizontally arranged exhaust pipes are uniformly and intermittently communicated on the backwashing gas pipe, an exhaust hole is formed on each exhaust pipe, and the backwashing branch pipes and the exhaust pipes are arranged alternately; the filter bricks are arranged above the backwashing branch pipes and the exhaust pipes.

4. The front denitrification deep bed biofilter domestic sewage treatment device according to claim 3, characterized in that, a material stirring mechanism is arranged in the deep bed biofilter, the material stirring mechanism comprises a pneumatic cylinder, a fixed plate and a plurality of rake teeth, the fixed plate is located above the layer of quartz sand, a guide groove is arranged on each of a pair of opposite inner side walls of the deep bed biofilter, the fixed plate is slidingly arranged in the guide groove, the pneumatic cylinder is horizontally arranged outside the deep bed biofilter, a piston rod of the pneumatic cylinder is fixedly connected with the fixed plate, the plurality of rake teeth are uniformly and intermittently arranged along the length direction of the fixed plate, and the rake teeth are embedded in the layer of quartz sand.

5. The front denitrification deep bed biofilter domestic sewage treatment device according to claim 3, characterized in that, from bottom to top, an inclined pipe filler and a suspended ball filler are sequentially arranged in the sedimentation tank, and an adjusting mesh plate is horizontally arranged in the sedimentation tank, and the suspended filler ball is located above the adjusting mesh plate.

6. The front denitrification deep bed biofilter domestic sewage treatment device according to claim 5, characterized in that, sliding blocks are arranged on the opposite inner side walls of the sedimentation tank, a sliding groove matched with the sliding blocks is arranged on the adjusting mesh plate, a winch is arranged above the sedimentation tank, and the winch is connected with the adjusting mesh plate through a steel wire rope; a feeding port is arranged at the top of the sedimentation tank.

7. The front denitrification deep bed biofilter domestic sewage treatment device according to claim 6, characterized in that, a gate is arranged at the water inlet, and a second water inlet pipe is arranged above the deep bed biofilter.

8. The front denitrification deep bed biofilter domestic sewage treatment device according to claim 7, characterized in that, a slope is arranged at the bottom of the sedimentation tank below the first water inlet pipe, a sludge sedimentation area is formed between the slope and the bottom of the sedimentation tank, a sludge discharge pipe is arranged in the sludge sedimentation area, and one end of the sludge discharge pipe is connected with a sludge discharge pump after penetrating out of the sedimentation tank.

Images