Backflushing energy dissipation device of filter press

Abstract

The utility model relates to a back flushing energy dissipation device of a filter press, the tail end of a back flushing sludge backflow main pipe is connected with an exhaust branch pipe and a back flushing sludge backflow secondary pipe through a three-way pipe, the exhaust branch pipe extends upwards and is provided with an exhaust branch special valve, and the back flushing sludge backflow secondary pipe extends downwards and is provided with an exhaust branch special valve. An energy dissipation device is arranged at the lower end of the back flushing sludge backflow secondary pipe, a porous water leakage grid groove is vertically arranged below the energy dissipation device, and a plurality of groove body fixing tie bars are uniformly arranged on the circumference below the energy dissipation device; the energy dissipation device comprises an energy dissipation cover body II and an energy dissipation cover body I which are integrally formed, the energy dissipation cover body II is in a circular tube shape, the upper end of the energy dissipation cover body II is in butt joint with the blowback sludge backflow secondary pipe, the lower end of the energy dissipation cover body II is connected with the energy dissipation cover body II, the energy dissipation cover body I is in a flaring horn shape, and the flaring end of the energy dissipation cover body I faces downwards. According to the utility model, through continuous multi-time energy dissipation, the back-flushing speed of sludge and sewage is reduced, and splashing of the sludge and sewage is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of backflushing energy dissipation devices of filter press, belong to the technical field of sludge dewatering equipment. BACKGROUND

[0002] In conventional wastewater production, sludge has the requirement of reduction, and sludge dewatering equipment is a better sludge reduction option, which can effectively reduce the moisture content of sludge and greatly reduce the volume of sludge; in production, plate-and-frame filter press, belt filter press and screw press are the three most common sludge dewatering equipment.

[0003] The plate-and-frame filter press is divided into feeding (filtration), backflushing, secondary squeezing, sludge unloading and cleaning during operation; generally, 2 times of backflushing are performed after feeding and secondary squeezing are completed to clean the residual sludge in the center feeding pipe and membrane cavity, and compressed air is introduced for 10-15 seconds; the residual sludge backflushed out is returned to the sludge tank through the backflushing sludge pipe; due to the high pressure and large expansion coefficient of compressed air, the residual sludge backflushed out splashes everywhere, which causes great disturbance to the operating environment. UTILITY MODEL CONTENT

[0004] To solve the above problems, the utility model discloses a kind of backflushing energy dissipation devices of filter press, and the specific technical solutions are as follows:

[0005] A kind of backflushing energy dissipation devices of filter press, including backflushing sludge backflow main pipe, the end of the backflushing sludge backflow main pipe is connected with exhaust branch pipe and backflushing sludge backflow secondary pipe through tee pipe, the exhaust branch pipe is upwardly extended, the exhaust branch pipe is provided with exhaust branch special valve, the backflushing sludge backflow secondary pipe is downwardly extended, the backflushing sludge backflow secondary pipe lower end is provided with energy dissipation device, the vertical lower side of the energy dissipation device is provided with porous water leakage grid groove, the lower side of the energy dissipation device is uniformly provided with a plurality of groove fixed reinforcing bars;

[0006] The energy dissipation device includes integrally-formed energy dissipation cover body II and energy dissipation cover body I, the energy dissipation cover body II is in the form of a circular tube, the upper end is connected with the backflushing sludge backflow secondary pipe, and the lower end is connected with the energy dissipation cover body I, the energy dissipation cover body I is in the form of an expanded trumpet, and the expanded end is downward.

[0007] Further, the groove fixed reinforcing bar is selected from rubber joint.

[0008] Further, a gap is reserved between adjacent groove fixed reinforcing bars.

[0009] Further, the lower end of the groove fixed reinforcing bar is fixed with the porous water leakage grid groove.

[0010] Further, the flared end diameter of the energy dissipation cover body I is 1.5 times of the diameter of the energy dissipation cover body II.

[0011] Further, the porous water leakage grid slot is in the shape of an open slot body, and includes a surrounding barrier and a bottom plate, wherein the bottom plate is provided with water leakage grid holes distributed therein, and the retention rate of the porous water leakage grid slot is 50%.

[0012] Further, the porous water leakage grid slot is in the shape of a rectangular slot body, and the length of the side of the bottom plate of the porous water leakage grid slot is not less than 2 times of the flared end diameter of the energy dissipation cover body I.

[0013] Further, the blowback sludge return main pipe is provided with a connecting flange at one end connected with the energy dissipation cover body II, and the connecting flanges are connected and fixed through bolts.

[0014] The utility model discloses the beneficial effect is:

[0015] Increase the adjustable exhaust branch special valve in the exhaust branch pipe, and the partial compressed air is divided, realizes the first energy dissipation;

[0016] The energy dissipation device is arranged at the lower end of the blowback sludge return secondary pipe, the energy dissipation cover body I and the energy dissipation cover body II are the gradually changed surface of horn shape between, slow down the flow rate of pipeline medium, realize the second energy dissipation;

[0017] The compressed air flows out between the energy dissipation device and the porous water leakage grid slot, and the high-energy gas is divided, and the solid-liquid is blocked by the baffle around the porous water leakage grid slot, realizes the third energy dissipation, and after energy dissipation, will not cause splashing phenomenon;

[0018] The slot body fixing pull bar is arranged at the lower end of the blowback sludge return secondary pipe, and the material of the slot body fixing pull bar can be selected, and the rubber joint with the micro-soft texture is mainly used, and under the impact of a large amount of sludge, the micro-deformation can be carried out, the kinetic energy of sludge impact can be effectively eliminated, and the fourth energy dissipation is realized.

[0019] The porous water leakage grid slot stores solid-liquid temporarily when being used, and when the sludge does not flow out from the energy dissipation device, slowly flows out from the plurality of water leakage grid holes at the bottom of the porous water leakage grid slot, and the fifth energy dissipation is realized.

[0020] The utility model discloses the device specification is adjustable, and the size is adjusted according to different sludge return flow and use requirement, so as to satisfy different demands.

[0021] The utility model discloses the device not only can be used as the energy dissipation device of sludge blowback device, can also be used in other compressed air, liquid, solid separation demand place.

[0022] The utility model discloses the device does not increase additional equipment, and the unit with the demand of reform only needs to install in the original pipeline.

[0023] The utility model discloses low cost, simple to use, small maintenance difficulty, low to user requirement is favorable to the promotion. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the whole structure schematic diagram of the utility model,

[0025] Figure 2 It is the energy dissipation device structure schematic diagram of the utility model,

[0026] Figure 3 It is Figure 2 1-1 cross section view in among,

[0027] Figure 4 It is the porous water leakage grid slot structure schematic diagram of the utility model,

[0028] Figure 5 It is Figure 4 2-2 cross section view in among,

[0029] Mark list: 1 - blowback sludge reflux main pipe, 2 - exhaust branch pipe, 3 - exhaust branch special valve, 4 - energy dissipation device, 5 - blowback sludge reflux secondary pipe, 6 - connecting flange, 7 - energy dissipation cover body II, 8 - energy dissipation cover body I, 9 - groove fixed pull bar, 10 - porous water leakage grid slot, 11 - water leakage grid hole. DETAILED DESCRIPTION

[0030] The utility model is further illustrated below in conjunction with the drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the utility model and are not used to limit the scope of the utility model.

[0031] In conjunction with the drawings Figures 1-5 Visible, the main structure of the utility model is: the end of blowback sludge reflux main pipe 1 is connected with tee pipe, one end of tee pipe is connected with upwardly extending exhaust branch pipe 2, exhaust branch pipe 2 is provided with exhaust branch special valve 3, the other end of tee pipe is connected with downwardly extending blowback sludge reflux secondary pipe 5.

[0032] The lower end of blowback sludge reflux secondary pipe 5 is provided with energy dissipation device 4, and energy dissipation device 4 includes integrally-formed energy dissipation cover body II 7 and energy dissipation cover body I 8, energy dissipation cover body II 7 is in the form of a circular tube, the upper end is butted with blowback sludge reflux secondary pipe 5, and the lower end is connected with energy dissipation cover body I 8, energy dissipation cover body I 8 is in the form of an expanded trumpet, and the expanded end faces downward.

[0033] A plurality of porous water leakage grating grooves 10 are arranged vertically below the energy dissipation device 4, the plurality of porous water leakage grating grooves 10 are in the shape of an open groove body, including a surrounding barrier and a bottom plate, the bottom plate is provided with water leakage grating holes 11, a plurality of groove body fixing ribs 9 are uniformly arranged on the circumference of the energy dissipation device 4, and a gap is reserved between adjacent groove body fixing ribs 9. The groove body fixing rib 9 is fixed with the porous water leakage grating groove 10. The groove body fixing rib 9 has elasticity and can be elastically deformed when impacted.

[0034] The anti-blowing sludge return main pipe 1 is connected with one end of the energy dissipation cover body II 7, and is provided with a connecting flange 6. The connecting flanges 6 are connected and fixed by bolts.

[0035] The specific embodiments applied by the utility model are given below:

[0036] The amount of anti-blowing sludge of different plate and frame dewaterers is different, and needs to be selected according to the demand and actual situation. The selection process and experiment process are shown below according to the actual situation of a specific project.

[0037] The single anti-blowing sludge water amount of the project plate and frame is 100 liters, and the anti-blowing setting duration is generally 10-15 seconds. Taking this as a known condition, engineering design is carried out.

[0038] The total air volume of anti-blowing is generally 5 times the sludge water amount, and the duration is the same as the above "anti-blowing duration". The air volume per unit time is 33.5 L / s.

[0039] The total amount of anti-blowing gas, liquid and solid is 100L+5*100L=600L.

[0040] The exhaust branch pipe 2 is a primary energy dissipation measure, and the exhaust branch pipe 2 is set to 0.5 times the total air volume, which is 0.5*33.5L / s=16.75L / s. The general air flow rate is 10-15 m / s, which is the energy dissipation and anti-splashing here, and the gas flow rate is set to 8 m / s. According to the flow rate calculation equation A=Q / V, it can be known that the pipe diameter of the exhaust branch pipe 2 is 51.516 mm, and the nominal diameter of the pipe is DN65. The special valve specification of the adjustable exhaust branch is DN65.

[0041] The sludge passing capacity of the anti-blowing sludge return secondary pipe 5 is 23.5L / s, and the flow rate of the anti-blowing sludge return secondary pipe 5 is 2 m / s. According to the flow rate calculation equation A=Q / V, it can be known that the pipe diameter of the anti-blowing sludge return secondary pipe 5 is 121.91 mm, and the nominal diameter of the pipe is DN125.

[0042] The energy dissipation cover body I 8 (horn mouth) specification is 1.5 times the pipe diameter of the anti-blowing sludge return secondary pipe 5, which is 225 mm.

[0043] The retention rate of the porous water leakage grid groove 10 is designed to be 50%, that is, 50% of the sludge-water mixture falls into the sludge tank during the back flushing process (it is pointed out by experiments that if the appropriate grid hole diameter is selected, the gas will overflow and is not included), and the remaining is stored in the porous water leakage grid groove 10, the volume of the porous water leakage grid groove 10 is 100L*50%=0.05m3; the porous water leakage grid groove 10 is a square coverless groove body, the side length needs to be greater than the size of the horn mouth and not less than 2 times the diameter of the horn mouth, that is, 225mm*2=0.45m, and the groove height is 0.05m3 / 0.45m / 0.45m≈0.25m.

[0044] The impact sludge-water quantity falling into the sludge tank during the back flushing process is =100L*(1-50%)+(33.5L-16.75L) / 15s≈51L / s.

[0045] The water leakage grid hole 11 of the porous water leakage grid groove 10 is determined by experiments to be in the range of 10mm~20mm, and according to the layout of the 2-2 cross-sectional view shown in the figure, 130 water leakage grid holes are arranged, and the flow velocity is 1.5m / s, and it is calculated that the single-hole size of the water leakage grid hole is 18.3mm. Figure 5

[0046] Through experiments, it is obtained that the most suitable hole diameter of the water leakage grid hole is in the range of 10mm~20mm.

[0047] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as such.

[0048] The meaning of "connection" described in the present application can be a direct connection between components or an indirect connection between components through other components.

[0049] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can certainly make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.​

Claims

1. A filter press backflushing and flushing energy dissipation device, comprising a backflushing sludge return main pipe (1), characterized in that, The end of the backflushing sludge return main pipe (1) is connected to the exhaust branch pipe (2) and the backflushing sludge return secondary pipe (5) through a three-way pipe. The exhaust branch pipe (2) extends upward and is equipped with an exhaust branch special valve (3). The backflushing sludge return secondary pipe (5) extends downward and is equipped with an energy dissipation device (4) at the lower end of the backflushing sludge return secondary pipe (5). A porous water leakage grid groove (10) is set vertically below the energy dissipation device (4). Several groove fixing ribs (9) are evenly arranged around the lower circumference of the energy dissipation device (4). The energy dissipation device (4) includes an integrally formed energy dissipation hood body II (7) and an energy dissipation hood body I (8). The energy dissipation hood body II (7) is in the shape of a round tube, with its upper end connected to the backflushing sludge return secondary pipe (5) and its lower end connected to the energy dissipation hood body I (8). The energy dissipation hood body I (8) is in the shape of a flared trumpet with the flared end facing downward.

2. The filter press backflushing and flushing energy dissipation device according to claim 1, characterized in that, The trough fixing tie (9) is made of rubber joint.

3. The filter press backflushing and flushing energy dissipation device according to claim 1, characterized in that, A gap is reserved between adjacent trough fixing ribs (9).

4. The filter press backflushing and flushing energy dissipation device according to claim 1, characterized in that, The lower end of the trough fixing tie (9) is fixed to the porous drainage grid trough (10).

5. The filter press backflushing and flushing energy dissipation device according to claim 1, characterized in that, The diameter of the flared end of the energy dissipation shield body I (8) is 1.5 times the diameter of the energy dissipation shield body II (7).

6. The filter press backflushing and flushing energy dissipation device according to claim 1, characterized in that, The porous drainage trough (10) is an open trough shape, including a surrounding enclosure and a bottom plate. The bottom plate has drainage holes (11) distributed on it. The retention rate of the porous drainage trough (10) is 50%.

7. The filter press backflushing and flushing energy dissipation device according to claim 1, characterized in that, The porous drainage trough (10) is a rectangular trough, and the side length of the bottom plate of the porous drainage trough (10) is not less than twice the diameter of the flared end of the energy dissipation hood body I (8).

8. The filter press backflushing and flushing energy dissipation device according to claim 1, characterized in that, The backflushing sludge return main pipe (1) is connected to the energy dissipation hood body II (7) at one end, and the connecting flange (6) is provided at the other end. The connecting flange (6) is connected and fixed by bolts.

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