JPS643595Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a gravity dewatering device in a belt press. Conventionally, in a general belt press, a pair of upper and lower endless cloths is freely runnable between a large number of parallel rolls, and in the first stage, the sludge, etc., supplied onto the cloth is first dehydrated by gravity through the cloth. After that, it is held between upper and lower cloths and dehydrated under pressure using rolls in the latter stage.
Therefore, when dehydrating at high pressure in the latter stage, if sufficient dewatering is not done in the gravity dehydration zone in the first stage, the sludge will protrude from between the cloths, making it impossible to pressurize at high pressure, and the discharged cake will also have a high moisture content. Become.

This invention is intended to provide a device that can be used in the gravity dewatering zone of a belt press to achieve high dewatering, and will be explained below based on the drawings as follows:
Its structure, as shown in the figure, consists of a pair of upper and lower cloths that are freely runnable between a large number of parallel rolls.
In a belt press configured to supply sludge between the cloths for dewatering, the progress of the cloth 1 when viewed in plan, facing the upper surface of the lower cloth 1 in the gravity dewatering zone A where the sludge is supplied. A plurality of sets of eight-shaped guide plates 2, 2 with narrower directions are provided, and the pair of guide plates 2, 2 are covered with a top plate 3, and the front side of the pair of guide plates 2, 2 is covered with a top plate 3. The height of the side opening is gradually lowered toward the front side in the direction of movement of the cloth 1. To explain the guide plates 2, 2 in detail based on FIGS. 2 and 3, the front and rear guide plates 2, 2 are connected to each other by a connecting rod 4 and suspended from the machine frame (suspended). The height of the front opening of each guide plate 2, 2 is made lower as it is located toward the front of the cloth 1 (h4<h3), as shown in FIG.
<h2<h1). Further, as shown in Fig. 2, the top plate 3 has a rear half 3' made of a flexible material such as a rubber plate, and is configured to expand upward when a large amount of sludge comes. There is.

This device is constructed as described above, and therefore, the sludge S supplied from the sludge supply pipe 5 onto the cloth 1
As shown in FIG.
While being drawn to the center of the cloth 1 by the cloth 1, the moisture passes through the cloth 1 and is dehydrated and concentrated. The sludge that has passed through the guide plates 2, 2 of the first stage still has fluidity and diffuses again after leaving the guide plates 2, 2, but this diffused sludge S is transferred to the second stage. In this way, while passing through the final stage guide plates 2, 2, diffusion and accumulation by the guide plates are repeated several times, resulting in dehydration. be done. At the same time, when the sludge comes out from the guide plates 2, 2, the heights of these outlets are lowered one after another, so that the sludge is lightly pressurized by the top plate 3 as the cloth 1 runs. , the aforementioned dehydration effect is further promoted. In this way, the dewatered sludge that comes out of the final stage guide plates 2, 2 loses its fluidity and is dehydrated into a cake-like form, so when pressurizing in the latter stage pressurizing zone,
It is possible to apply high pressure without escaping laterally from between the fabrics, and high dehydration is possible. As shown in the illustrated example, if the rear half 3' of the top plate 3 is made of a flexible material or is pivotally connected to the top plate 3, it will expand according to the amount of sludge, and the sludge will be removed. It is even more effective because there is no need to apply unreasonable pressure to the object.

[Brief description of the drawings]

Figure 1 is a side view of a belt press with this invention, Figure 2 is an enlarged plan view of the gravity dewatering part, and Figure 3 is a sectional view taken along line A-A in Figure 2. be. Code explanation, 1... lower cloth, 2... information board, 3...
…Top board.

Claims (1)

[Scope of utility model registration request] In a belt press configured such that a pair of upper and lower cloths are freely runnable between a large number of parallel rolls, and sludge is supplied between the cloths for dewatering, in a gravity dewatering zone A where the sludge is supplied. Looking at the top of the lower cloth 1,
A plurality of sets of eight-shaped guide plates 2, 2 are provided front and back by narrowing the direction of movement of the cloth 1, and the pair of guide plates 2, 2 are covered with a top plate 3. A gravity dewatering device for a belt press, characterized in that the height of the opening on the front side of the cloth 1 is lowered as the front opening of the cloth 1 is located on the front side in the traveling direction of the cloth 1.