JP3036585U - Filter press equipment - Google Patents

Abstract

(57) An object of the present invention is to provide a highly efficient pumping pump capable of obtaining high pressure in one stage, for use in a filter press device. SOLUTION: A squeeze pump 7 is used as a pump for pumping slurry from an intake tank 3 to a filter press 11.
, A pressure sensor 16 for detecting the slurry pressure at the inlet of the filter press 11, a slurry pressure detected by the pressure sensor 16 is compared with a set pressure, and a pressure controller for controlling the drive motor 20 of the squeeze pump 7 by its output. 17 and.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a filter press filtration device, and particularly to a filter press device suitable for use in, but not limited to, sludge separation.

[0002]

[Prior art]

 Conventionally, when a filter press is used for dewatering slurry such as sludge, a centrifugal pump is used in multiple stages to pump the slurry to the filter press, and a reciprocating pump such as a diaphragm pump is used to perform batch pumping. It was.

[0003]

[Problems to be solved by the device]

However, the centrifugal pump, 5 kgf / cm ^2, 2-stage 10 kgf / cm ² pressure of about only obtained in the first stage, moreover wear significantly, fever In conjunction with, has resulted in wasting power . Moreover, although a diaphragm pump can obtain a relatively high pressure, a check valve is required, and there is a risk that the check valve will be blocked by the slurry and the check function will be lost.

An object of the present invention is to provide a filter press device using a pressure feed pump that improves the conventional slurry filtration device as described above, is efficient, and can obtain high pressure in one stage.

[0005]

[Means for Solving the Problems]

 According to the present invention, the above-mentioned problem is solved as follows. (1) A squeeze pump that pumps the slurry from the intake tank to the filter press, a pressure sensor that detects the slurry pressure at the inlet of the filter press, and the slurry pressure detected by this pressure sensor is compared with the set pressure, and the output And a pressure controller for controlling the drive motor of the squeeze pump.

(2) In the above item (1), an accumulator is provided in the line between the squeeze pump and the filter press.

[0007]

[Embodiment of the invention]

 FIG. 1 shows an embodiment in which the present invention is applied to a filter press device for obtaining a high-strength dehydrated cake by dehydrating sludge containing a large amount of organic substances, such as sludge in a sewage treatment plant. It is a thing.

The sludge slurry is sent from the conduit (2) to the intake tank (3) by the centrifugal pump (1). A flocculant is also fed into the intake tank (3) from the pipe line (4) and agitated by a motor-driven agitator (5) in the intake tank (3). The sludge slurry that has been agitated and begins to separate in this way is transferred from the conduit (6) at the bottom of the intake tank (3) to the conduit (8), the three-way valve (9), and the conduit by the squeeze pump (7). It is pumped to the filter press (11) via (10). As the squeeze pump (7), for example, a plurality of squeeze rollers (73) axially attached to the side surface of the rotating plate (72) are pressed against the inside of a flexible tube (71) bent in a U shape to rotate. It is possible to use a known one that is capable of continuously squeezing the tube (71) by rotating it with the plate (72) so as to pump the sludge and the like in the tube (71).

In the filter press (11), the sludge is compressed as a cake, and the separated water falls on the water receiving chute (12) and is collected from the pipe line (13). The sludge thus dehydrated is taken out as a dehydrated cake (14) in a batch manner. Reference numeral (15) is a pipe for returning the slurry remaining in the filter press (11) to the intake tank (3) through the three-way valve (9) by air or the like after the completion of water removal. Show the road.

In the filter press (11), as filtration progresses and the cake becomes thicker, the filter chamber approaches a closed state, and the pressure rises indefinitely. Therefore, the pressure of sludge is constantly detected by the pressure sensor (16) provided at the inlet of the filter press (11). The detected pressure is sent as a signal to the pressure controller (17), where it is compared with the set pressure (18). The output of the pressure controller (17) is sent to the inverter (19), which controls the drive motor (20) of the squeeze pump (7). That is, when the mud sending pressure is higher than the set pressure, the inverter (19) is used to reduce the rotation speed of the squeeze pump (7) or the operation of the squeeze pump (7) is stopped to send the mud. Reduce mud pressure. On the other hand, when the sludge feeding pressure is lower than the set pressure, the rotation speed of the squeeze pump (7) is increased by the inverter (19) to increase the mud feeding pressure, and thus the set pressure is constantly maintained. Automatically control to keep. FIG. 2 is a block diagram showing this control relationship.

In addition, an accumulator (21) may be provided in the conduit between the three-way valve (9) and the filter press (11). When it is necessary to control the rotation speed at a very low speed for a long time, such as dehydration of soft dewatering sludge such as sewage, the accumulator (21) can stabilize the control by providing a cushioning action.

[0012]

[Effect of the invention]

According to the present invention, a quantitative squeeze pump having a high-pressure feeding capacity (for example, 25 kgf / cm ² ) can be used as a high-pressure mud feeding pump of a filter press without fear of damaging the machine. By the way, the conventional centrifugal pump was inferior in pumping capacity of about 5 kgf / cm ² per stage, and was forced to be used in multiple stages. In addition, there were problems of wear and heat generation, and power loss was large. In addition, the diaphragm pump required a check valve, and there was a problem of pump wear. It was thought that it was difficult to use the squeeze pump until now, but by controlling the pressure, it can be used and its performance can be demonstrated.

When the accumulator is provided in the pipe line between the squeeze pump and the filter press as in the second aspect of the invention, it is possible to rotate at a slow speed for a long time like dehydration of soft dewatering sludge such as sewage. When control is required, the fluid pressure in the conduit can be cushioned to stabilize the control.

[Brief description of the drawings]

FIG. 1 is a conceptual layout view of a filter press device embodying the present invention.

FIG. 2 is a block diagram of a pressure control system of a filter press.

[Explanation of symbols]

 (1) Volute pump (2) Pipe (3) Intake tank (4) Pipe (5) Agitator (6) Pipe (7) Squeeze pump (8) Pipe (9) Three-way valve (10) Pipe ( 11) Filter press (12) Water receiving chute (13) Pipe line (14) Dehydration cake (15) Pipe line (16) Pressure sensor (17) Pressure controller (18) Set pressure (19) Inverter (20) Drive motor ( 21) Accumulator (71) Tube (72) Rotating plate (73) Squeeze roller

Front Page Continuation (73) Utility Model Holders 000149594 Omotogumi Co., Ltd. 1-11-13 Yamashita, Okayama City, Okayama Prefecture (73) Utility Model Holders 000001373 Kashima Construction Co., Ltd. 1-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 (73) Utility model holder 000001317 Kumagai Gumi Co., Ltd. 2-6-8 Chuo, Fukui City, Fukui Prefecture (73) Utility model holder 390036515 Konoike Gumi Co., Ltd. 4-355 Konohana-ku, Osaka City, Osaka Prefecture (73) Utility Model Holder 000166627 Goyo Construction Co., Ltd. 2-8 Koraku, Bunkyo-ku, Tokyo (73) Utility Model Holder 000172813 Sato Industry Co., Ltd. 1-11 Sakuragicho, Toyama City, Toyama Prefecture (73) Utility New patent holder 000002299 Shimizu Corporation 1-32 Shibaura, Minato-ku, Tokyo (73) Utility model holder 000207780 Taiho Construction Co., Ltd. 1-24-4 Shinkawa, Chuo-ku, Tokyo (73) Utility model holder 000219406 Toa Construction Industry Co., Ltd. 5 Yonbancho, Chiyoda-ku, Tokyo (73) Utility model right holder 000219875 Tokyu Construction Co., Ltd. Ceremony Company 16-14 Shibuya, Shibuya-ku, Tokyo (73) Utility model holder 000222668 Toyo Construction Co., Ltd. 4-1-1 Koraibashi, Chuo-ku, Osaka-shi, Osaka (73) Utility model holder 000235543 Tobishima Construction Co., Ltd. 2-73 Sanbancho, Chiyoda-ku, Tokyo (73) Utility model holder 000195971 Nishimatsu Construction Co., Ltd. 1-20-10 Toranomon, Minato-ku, Tokyo (73) Utility model holder 000112668 Fujita Co., Ltd. 4-chome, Sendagaya, Shibuya-ku, Tokyo 6-15 (73) Utility model holder 000174943 Mitsui Construction Co., Ltd. 3-10-1, Iwamotocho, Chiyoda-ku, Tokyo (73) Utility model holder 000000206 1-12 Nishimotocho, Ube-shi, Yamaguchi Prefecture No. 32 (73) Utility model owner 000006264 1-5-1, Otemachi, Chiyoda-ku, Tokyo Mitsubishi Materials Corporation (73) Utility model holder 000004190 Nippon Cement Co., Ltd. 1-16-1, Otemachi, Chiyoda-ku, Tokyo (73) Utility model holder 000183266 Sumitomo Osaka Cement Co., Ltd. East 1-chome, Mitodai-cho, Kanda, Chiyoda-ku (73) Utility model holder 000000240 Chichibu Onoda Co., Ltd. 2-14-1, Nishishimbashi, Minato-ku, Tokyo (73) Utility model holder 592180225 Narasaki Manufacturing Co., Ltd. Muroran, Muroran, Hokkaido 385, Machi (72) Inventor Shozo Naemura, Asahi 1 Tsukuba, Ibaraki Prefectural Civil Engineering Research Institute (72) Inventor Shinkichi Ogawa Asahi 1, Tsukuba, Ibaraki Prefectural Civil Engineering Institute (72) Inventor Shin Kiritsukoshi Bunkyo-ku, Tokyo 2-10-2 Otowa Inside the Front Edge Construction Technology Center (72) Inventor Yoshio Iso Iso 2-10-2 Otowa Bunkyo-ku, Tokyo Inside the Front Edge Construction Technology Center (72) Toshihiro Sumoto Central Tokyo 3-5-11 Nihonbashi Honcho, Tokyo (72) Omotogumi Co., Ltd. (72) Inventor Katsuhiko Ito 2-3-11, Kanda Surugadai, Chiyoda-ku, Tokyo Kochiike Gumi (72) Stock company Inventor Katsuma Ishikura Four Chiyoda-ku, Tokyo No. 5 Toa Construction Industry Co., Ltd. (72) Inventor Manabu Okada 2 Hitotsubashi, Chiyoda-ku, Tokyo -6-3 Toyo Construction Co., Ltd. (72) Creator Katsuhiro Seino 385 Sakimori-cho, Muroran-shi, Hokkaido Narasaki Seisakusho Co., Ltd.

Claims (2)

[Utility model registration claims] 1. A squeeze pump for pumping slurry from an intake tank to a filter press, a pressure sensor for detecting slurry pressure at the inlet of the filter press, and a slurry pressure detected by this pressure sensor is compared with a set pressure. A filter press device, comprising: a pressure controller that controls a drive motor of the squeeze pump according to an output. 2. An accumulator is provided in a pipe line between the squeeze pump and the filter press.
The described filter press device.