Sludge dosing efficient mixer

Abstract

The utility model relates to a sludge dosing efficient mixer which comprises a sludge inlet pipe, a dosing point communicated with an inner cavity of the sludge inlet pipe is arranged on the sludge inlet pipe, a spray pipe is arranged at one end of the sludge inlet pipe, a mixer is arranged below the spray pipe, the mixer comprises a mixer shell, a flow mixing pipe is arranged in an inner cavity of the mixer shell, and the flow mixing pipe is vertically through. A gap is reserved between the lower end of the flow mixing pipe and the bottom of an inner cavity of the mixer shell, a gap is reserved between the side wall of the flow mixing pipe and the side wall of the mixer shell, an overflow groove is formed in the upper portion of the mixer shell, discharging grooves are further formed in the two sides of the mixer shell, the overflow groove is communicated with inner cavities of the discharging grooves, and discharging openings are formed in the lower ends of the discharging grooves. According to the utility model, the original pipeline pressure is utilized, on the premise that the energy consumption is not increased, the molecular-level mixing effect of sludge and chemicals is achieved, the mixer belongs to unpowered equipment, materials are circulated at a high speed and molecular-level mixing is achieved only by utilizing the flow velocity of a pipeline medium, and the dosage of the chemicals is reduced by 50-65% under the same working condition, so that the production cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage dosing and mixing, in particular to a sludge dosing and efficient mixer. Background Art

[0002] The sludge produced by the thickening tank of papermaking and municipal sewage treatment units has a solid concentration of 3-5%. For subsequent comprehensive disposal, it needs to be further dehydrated. Dehydration requires various special mechanical equipment. Most equipment needs to be equipped with a dosing mixer during dehydration to add various liquid flocculants into the sludge for sludge flocculation and separation to ensure the dehydration efficiency of the equipment.

[0003] There are many ways to construct dosing mixers commonly used in papermaking and municipal sewage treatment industries. The most common ones are: mixing through variable-diameter nozzles: a small-diameter nozzle is set in the sludge channel to suddenly change the medium flow rate, forming a high-speed jet and then mixing with the agent; multi-hole dosing mixing: multiple dosing holes are set radially outside the sludge channel, and dosing and mixing in the channel at multiple points in a ring; or directly dosing and stirring in the sludge tank. None of the above methods can ensure that the mud and the medicine are fully mixed, resulting in a waste of medicines, and expensive medicines increase production costs; or excessive mixing for a very long time, or repeated flocculation and crushing, which wastes electricity and medicine efficacy. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, a sludge dosing high-efficiency mixer is proposed to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A sludge dosing high-efficiency mixer comprises a sludge inlet pipe, a dosing point identical to the inner cavity of the sludge inlet pipe is arranged on the sludge inlet pipe, a nozzle is arranged at one end of the sludge inlet pipe, a mixer is arranged below the nozzle, the mixer comprises a mixer shell, a mixing pipe is arranged in the inner cavity of the mixer shell, the mixing pipe is connected from top to bottom, there is a spacing between the lower end of the mixing pipe and the bottom of the inner cavity of the mixer shell, a gap is left between the side wall of the mixing pipe and the side wall of the mixer shell, an overflow trough is arranged on the upper part of the mixer shell, discharge troughs are arranged on both sides of the mixer shell, the overflow trough is communicated with the inner cavity of the discharge trough, and a discharge port is arranged at the lower end of the discharge trough.

[0007] As a further technical solution of the utility model: the lower end of the nozzle extends to the upper end of the mixing tube.

[0008] As a further technical solution of the utility model: the upper end of the mixing pipe extends into the overflow tank.

[0009] Beneficial effects of the utility model:

[0010] The mixer of the utility model comprises a mixer shell, the inner cavity of the mixer shell is provided with a mixing pipe, the upper part of the mixer shell is an overflow tank, the preliminary mixed liquid of sludge and reagent enters the mixing pipe at high speed through the nozzle, the liquid level of the mixing pipe rises and at the moment it submerges the upper part of the mixing pipe, the nozzle feed forms a high-speed jet circulation mixing with the internal liquid, and the sludge and the reagent are mixed at the molecular level without increasing the energy consumption. The mixer is a non-powered device, and only uses the flow rate of the pipeline medium to make the material circulate at a high speed to achieve molecular-level mixing.

[0011] The mixer is compact and cylindrical in shape, and can be flexibly arranged. It can be placed near the dehydration equipment, making full use of the space without occupying a special place. It requires approximately 1 meter in length and width of space, and can also be flexibly changed according to the on-site space, with strong adaptability.

[0012] The utility model has produced physical objects, and practice has shown that, taking the actual production record of a single belt dehydrator (papermaking chemical mixed sludge) as an example: 720m³ / day (30m³ / h*24h) of 3% concentration sludge, the concentration of the agent used is 2‰, and the flow rate is 3.5m³ / h; after using this application, the amount of agent is reduced to 1.2m³ / h, and the agent cost is calculated as follows: 3.5*24=84*2‰=168kg / d, the price is 11 yuan / kg, 168*11=1848 yuan / day, and the annual cost is 1848*360=665,280 yuan; the cost of using this application: 1.2*24=28.8*2‰=57.6*11=633.6 yuan / day, 633.6*360=228,100 yuan per year; the cost is reduced by 665,280-228,100 yuan per year, with a reduction rate of 65%. Under the same working conditions, the dosage of the agent is reduced by 50-65%, which is only one-half to one-third of the original dosage, maximizing the effect of the agent and significantly reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0014] Figure 2 This is a top view of the main structure of the mixer.

[0015] In the figure: 1-mud inlet pipe, 2-dosing point, 3-spray pipe, 4-mixer, 41-mixer shell, 42-mixing pipe, 43-gap, 44-overflow trough, 45-discharge trough, 46-discharge port. Implementation

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] Reference Figure 1-2 A sludge dosing high-efficiency mixer comprises a mud inlet pipe 1, a dosing point 2 which is the same as its inner cavity is provided on the mud inlet pipe 1, a flocculant is added into the inner cavity of the mud inlet pipe 1 from this point, a nozzle 3 is provided at one end of the mud inlet pipe 1, and a mixer 4 is provided below the nozzle 3.

[0018] The mixer 4 includes a mixer housing 41, the upper part of which is an overflow trough 44, and the inner cavity of the mixer housing 41 is provided with a mixing pipe 42, which is connected from top to bottom, and there is a gap between the lower end of the mixing pipe 42 and the bottom of the inner cavity of the mixer housing 41, and the upper end of the mixing pipe 42 extends into the overflow trough 44, and there is a gap 43 between the side wall of the mixing pipe 42 and the side wall of the mixer housing 41, and discharge troughs 45 are also provided on both sides of the mixer housing 41, and the overflow trough 44 is connected to the inner cavity of the discharge trough 45, and a discharge port 46 is opened at the lower end of the discharge trough 45. The lower end of the nozzle 3 extends to the upper end of the mixing pipe 42. The preliminary mixed liquid of sludge and reagent first enters the mixing tube 42 at a high speed through the nozzle 3, and flows into the gap 43 from the lower part of the mixing tube 42. The liquid level continues to rise. At the moment when it passes the upper part of the mixing tube 42, the feed from the nozzle 3 forms a high-speed jet circulation mixing with the internal liquid. As the liquid level continues to rise, the mixed sludge and reagent enter the overflow trough 44, and then enter the discharge trough from the overflow trough 44, and finally discharged from the discharge port 46.

[0019] The specific implementation mode of the utility model is as follows: according to the flow rate and velocity of the original dehydration equipment pipeline, the diameter and length of the mixer nozzle are accurately calculated, and then the diameter and height of the guide pipe and the mixer are calculated accordingly, and finally the assembly dimensions of each component are determined according to the above data, and the inner wall finish is processed after the assembly is completed.

[0020] The preliminary mixed liquid of sludge and reagent enters the mixing tube 42 at high speed through the nozzle 3. The liquid level of the mixing tube 42 rises. At the moment when it is submerged in the upper part of the mixing tube 42, the feed of the nozzle 3 forms a high-speed jet circulation mixing with the internal liquid. The jet speed is controlled to fully mix only the sludge and reagent with low concentration, and cannot break the floc particles that have been formed, so that the flocculation force of the reagent is effectively utilized and not wasted by secondary breaking; through the volume of the mixer, the mixing time is controlled to be completed within 8-10 seconds, and the flocculation and dehydration reaction is carried out in the following time. The interior of the mixer is all fixed parts assembled once, without any transmission and mechanical wear. It only needs to be cleaned regularly according to the situation, and no adjustment and maintenance are required.

[0021] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0022] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A sludge dosing high-efficiency mixer, comprising a sludge inlet pipe (1), the sludge inlet pipe (1) being provided with a dosing point (2) communicating with its inner cavity, and a nozzle (3) being provided at one end of the sludge inlet pipe (1), characterized in that: A mixer (4) is arranged below the nozzle (3), the mixer (4) comprising a mixer housing (41), the inner cavity of the mixer housing (41) being provided with a mixing pipe (42), the mixing pipe (42) being connected from top to bottom, a gap being provided between the lower end of the mixing pipe (42) and the bottom of the inner cavity of the mixer housing (41), a gap (43) being provided between the side wall of the mixing pipe (42) and the side wall of the mixer housing (41), an overflow groove (44) being provided at the upper part of the mixer housing (41), discharge grooves (45) being provided on both sides of the mixer housing (41), the overflow groove (44) being communicated with the inner cavity of the discharge groove (45), and a discharge port (46) being provided at the lower end of the discharge groove (45).

2. A sludge dosing high-efficiency mixer according to claim 1, characterized in that: The lower end of the nozzle (3) extends to the upper end of the mixing pipe (42).

3. A sludge dosing high-efficiency mixer according to claim 2, characterized in that: The upper end of the mixing pipe (42) extends into the overflow tank (44).

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