CN202945139U - Sludge dewatering device - Google Patents

Abstract

The utility model discloses a sludge dewatering device, which belongs to the technical field of sludge dewatering. It includes a centrifugal pump, a negative pressure forming device, a sludge water inlet pipe, a water collecting main, a well point pipe, a circulating water tank, a partition and a drain; the negative pressure forming device is a jet; the jet includes a mixing chamber, a mixing chamber One side is the sludge water inlet, the sludge water inlet is connected with the sludge water inlet pipe, a trumpet-shaped booster pipe with a large mouth upward is installed in the mixing chamber, and a working water inlet is installed on the trumpet-shaped opening. The lower part is equipped with a double bell-mouth nozzle with opposite small mouths, the upper bell mouth of the nozzle corresponds to the small mouth of the booster pipe, and the lower bell mouth is the mixed water outlet. The beneficial effect is that: the negative pressure generated by the ejector makes the well point pipe form a vacuum, the production is easy, the transportation is convenient, and the economic and social benefits are remarkable.

Description

Sludge dewatering device

technical field

The utility model relates to a sludge dewatering device, which belongs to the technical field of sludge dewatering.

Background technique

A large amount of sewage and sludge are often produced during the construction of the project. Sludge is the product of sewage treatment, which is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, colloids, etc. The main characteristics of sludge are high water content (up to 99%), high content of organic matter, easy to rot and smell, and the particles are finer, the specific gravity is smaller, and it is in a colloidal liquid state. It is a thick substance between liquid and solid, which can be transported by pump, but it is difficult to separate solid and liquid by sedimentation. As the saying goes, "dragging mud and water", no matter what method is used, dehydration is a necessary prerequisite for sludge treatment and disposal. However, it is not easy to find a way to "squeeze water" as much as possible from the sludge. Existing sludge dehydration methods include: 1. Thermal evaporation method, which is the most straightforward method, simple and easy to implement, but consumes too much energy. For every ton of sludge with a moisture content of 80%, 200 kg of water must be removed Only then can it become sludge with a moisture content of 75%, and the method of thermal energy evaporation needs to consume 25 kilograms of coal or 18.3 cubic meters of natural gas. The main drying technologies such as natural gas drying, steam drying, and lime drying are used to make the sludge finally be used for landfill or incineration. Although this is available for small amount of poultry and livestock manure, the cost is too high. It is impossible to solve the sludge of sewage treatment plants and river pond sludge in a large amount and a wide area in my country. 2. Use a dehydrator for treatment. The main sludge dewatering facilities include: plate and frame filter press, belt dehydrator and centrifugal dehydrator. Because they need to be used in conjunction with thickening tanks, these facilities are often fixed in sludge treatment plants, and most of them have disadvantages such as high energy consumption, high noise, and large space occupation.

Contents of the invention

In order to solve the above problems, the utility model provides a sludge dewatering device.

The utility model is realized by the following technical scheme: a sludge dewatering device, which includes a centrifugal pump, a negative pressure forming device, a sludge water inlet pipe, a water collection main pipe, a well point pipe, a circulating water tank, a partition and a drain ; The negative pressure forming device is installed above the circulating water tank, and is passed into the circulating water tank through the pipeline; the negative pressure forming device is also connected to the water collection main pipe through the sludge water inlet pipe, and the water collection main pipe is connected to the well point pipe; the centrifugal pump passes through The pipeline is connected with the circulating water tank, and at the same time connected with the negative pressure forming device through the pipeline.

The negative pressure forming device is an ejector; the ejector includes a mixing chamber, one side of the mixing chamber is a sludge water inlet, the sludge water inlet is connected with the sludge water inlet pipe, and a The trumpet-shaped booster pipe with a large mouth upwards is equipped with a working water inlet on the trumpet-shaped opening, and a double-bell-mouth nozzle with a small mouth opposite to the lower part of the mixing chamber is installed. The upper bell mouth of the nozzle corresponds to the small mouth of the booster pipe, and the lower bell mouth For mixed water outlet. The lower bell mouth is connected to the circulating water tank through the pipeline.

The working principle is: the water pump pumps out the working water from the water tank, and returns to the water tank through the ejector, and the ejector forms a negative pressure inside under the action of the working water. Negative pressure is formed, so that the water in the sludge is forced to enter the well point pipe, enter the jet through the well point pipe, water collection main pipe, and sludge water inlet pipe, and form mixed water together with the working water in the jet and send it to the working water tank .

The beneficial effect of the utility model is that: the negative pressure generated by the jet device makes the well point pipe form a vacuum, the production is easy, the transportation is convenient, and the economic and social benefits are remarkable.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Fig. 1 is the working schematic diagram of sludge dewatering device;

Figure 2 is a schematic diagram of the structure of the ejector.

In the figure: 1-water pump; 2-ejector; 3-sludge water inlet pipe; 4-collection main pipe; 5-well point pipe; 6-circulating water tank; Table; 10-Pressure gauge; 2.1-Working water inlet; 2.2 Booster pipe; 2.3 Mixing chamber; 2.4-Throat pipe; 2.5-Nozzle wall; 2.6-Mixed water outlet.

Detailed ways

As shown in Figure 1, the sludge dewatering device includes a centrifugal pump 1, a negative pressure forming device 2, a sludge water inlet pipe 3, a water collection main pipe 4, a well point pipe 5, a circulating water tank 6, a partition 7 and a drain port 8 The negative pressure forming device 2 is installed on the top of the circulating water tank 6, and is passed into the circulating water tank 6 through a pipeline; the negative pressure forming device 2 is also connected with the water collecting main pipe 4 through the sludge water inlet pipe 3, and the water collecting main pipe 4 is connected with the well The point pipe 5 is connected; the centrifugal pump 1 is connected with the circulating water tank 6 through the pipeline, and at the same time is connected with the negative pressure forming device 2 through the pipeline; the negative pressure forming device 2 is an ejector. A pressure gauge 10 is installed on the pipeline connecting the centrifugal pump 1 and the ejector 2 . A vacuum gauge 9 is installed on the water inlet pipe 3 .

As shown in Figure 2, the upper arrow indicates working water, the lower arrow indicates mixed water, and the right arrow indicates sludge water. The ejector includes a mixing chamber 2.3, one side of the mixing chamber 2.3 is a sludge water inlet, and the sludge water inlet is connected to the sludge water inlet pipe 3, and a trumpet-shaped booster pipe 2.2 with a large mouth upward is installed in the mixing chamber 2.3, and its A working water inlet 2.1 is installed on the trumpet-shaped opening, and a double-bell-mouth nozzle 2.5 with a small mouth opposite to each other is installed at the bottom of the mixing chamber 2.3. The upper bell mouth 2.4 of the nozzle 2.5 corresponds to the small mouth of the booster pipe 2.2, and the lower bell mouth 2.6 is mixed water. The outlet and the lower bell mouth 2.6 are connected to the circulating water tank 6 through pipelines. The water inlet bell mouth of the booster pipe 2.2 changes from large to small, with a length of 80-100mm, a maximum outer diameter of 60mm, a large mouth diameter of 50mm, and a small mouth diameter of 15-20mm; the working water inlet and the working water inlet pipe are welded or Threaded connection, the interface must be tight and airtight. The mixing chamber 2.3 is made of a steel pipe with an outer diameter of 120 mm, an inner diameter of 100 mm, and a length of 120-140 mm, and is airtightly connected with the working water inlet, mixed water outlet, and sludge water inlet device; the nozzle 2.5 uses an outer diameter It is made of round steel with a length of 150 mm and a length of 150-200 mm; the diameter of the large mouth of the water inlet bell mouth is 130 mm, the diameter of the small mouth is 30-40 mm, and the distance between the big and small mouths is about 30 mm; the diameter of the small mouth of the water outlet bell mouth is 30-40 mm, and the diameter of the large mouth is 130 mm -140mm.

Turn on the water pump, the working water in the circulating water tank 6 will enter the ejector 2 through the pipeline, the water pressure will be increased through the working water inlet, and the flow speed of the water will be accelerated. When the working water is injected into the mixing water outlet, the mixing chamber will The gas and water in the water are brought into the mixed water outlet, so that the mixing chamber forms a negative pressure. At this time, the sludge water inlet pipe 3, the water collection main pipe 4, and the well point pipe 5 all form a negative pressure, so that the water in the sludge is forced to enter the well point. The pipe 5 enters the ejector 2 through the well point pipe 5, the water collecting pipe 4, and the sludge water inlet pipe 3, and forms mixed water together with the working water in the ejector 2 and is sent to the circulating water tank.

Claims (4)

1. A sludge dewatering device, characterized in that it includes a centrifugal pump (1), a negative pressure forming device (2), a sludge water inlet pipe (3), a water collection main pipe (4), a well point pipe (5 ), circulating water tank (6), clapboard (7) and drain port (8); the negative pressure forming device (2) is installed above the circulating water tank (6), and passes into the circulating water tank 6 through the pipeline; negative pressure forming The device (2) is also connected to the water collection main pipe (4) through the sludge water inlet pipe (3), and the water collection main pipe (4) is connected to the well point pipe (5); the centrifugal pump (1) is connected to the circulating water tank ( 6) Connect, and at the same time connect with the negative pressure forming device (2) through the pipeline. the 2. The sludge dewatering device according to claim 1, characterized in that, the negative pressure forming device (2) is a jet; the jet includes a mixing chamber (2.3), and the mixing chamber (2.3) One side is the sludge water inlet, the sludge water inlet is connected with the sludge water inlet pipe (3), and a trumpet-shaped booster pipe (2.2) with a large mouth upward is installed in the mixing chamber (2.3). The working water inlet (2.1) is installed, and the lower part of the mixing chamber (2.3) is equipped with a double bell mouth nozzle (2.5) with a small mouth opposite to each other. The upper bell mouth (2.4) of the nozzle (2.5) corresponds to the small mouth of the booster pipe (2.2) , the lower bell mouth (2.6) is the mixed water outlet, and the lower bell mouth is connected to the circulating water tank (6) through a pipeline. the 3. The sludge dewatering device according to claim 1, characterized in that a pressure gauge (10) is installed on the connecting pipeline between the centrifugal pump (1) and the ejector (2). the 4. The sludge dewatering device according to claim 1, characterized in that a vacuum gauge (9) is installed on the sludge water inlet pipe (3). the

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