TWM650490U - Plunger feeding pump for continuous thermal hydrolysis of sludge - Google Patents

Abstract

This invention provides a feed plunger pump for continuous thermal hydrolysis of sludge, including a pump body, and the outlet of the pump body is provided with a check valve; the check valve includes a shell, and a medium is opened on the shell Inlet and medium outlet; a rotating shaft is provided on one side of the medium inlet, and a valve flap is rotationally connected to the rotating shaft, and when the valve flap rotates to the first limit position, the valve flap can block the entry of the medium; inside the housing A limit post is also provided. When the valve disc moves to the second limit position, the valve disc abuts against the limit post. There is also a closed valve flow channel in the housing. When the valve disc moves to the second limit position, When the valve disc blocks one end of the closed valve flow channel, the other end of the closed valve flow channel is connected to the medium outlet. This invention uses a check valve to reduce the backflow of sludge into the plunger pump and reduces the working pressure of the plunger pump; it uses a closed valve flow channel to allow part of the reverse flow sludge to enter the closed valve flow channel, pushing the valve disc downward so that The valve disc is closed.

Description

Feed plunger pump for continuous thermal hydrolysis of sludge

This invention belongs to the field of sludge treatment, especially involving feed plunger pumps for continuous thermal hydrolysis of sludge.

Sludge is the product of sewage treatment. It is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles and colloids. In the field of municipal sludge treatment, the thermal hydrolysis process is gradually being recognized by the industry as a pretreatment method for sludge. In the thermal hydrolysis process, due to the high viscosity and poor fluidity of the sludge, a multi-stroke plunger pump needs to be used to pump the sludge into the hydrolysis device. During the operation of the plunger pump, during each stroke, the power provided by the plunger pump is sufficient, and the sludge moves toward the discharge port. However, after the end of the stroke, the power provided by the plunger pump is insufficient. At the discharge port of the pump, the sludge squeezes each other during the stroke stage. Due to insufficient subsequent power, the sludge at the discharge port appears to reverse flow, which increases the working pressure of the plunger pump and easily causes damage to the plunger pump. When dealing with high-viscosity flowing media, the existing check valve cannot effectively close the pipeline and protect the plunger pump.

In view of this, this creation aims to propose a feed plunger pump for continuous thermal hydrolysis of sludge to reduce the working pressure of the plunger pump.

In order to achieve the above purpose, the technical solution of this creation is implemented as follows.

The feed plunger pump used for continuous thermal hydrolysis of sludge includes a pump body, and the outlet of the pump body is provided with a check valve; the check valve includes a shell, and the shell is provided with a medium inlet and a medium outlet. and a flow channel connecting the medium inlet and the medium outlet; a rotating shaft is provided on one side of the medium inlet, and a valve disc is rotationally connected to the rotating shaft, and when the valve disc rotates to the first limit position, the valve disc can block the entry of the medium ; The housing is also provided with a limit post. When the valve disc moves to the second limit position, the valve disc is pressed against the limit post; the housing is also provided with a closed valve flow channel. When the valve disc moves, When it moves to the second limit position, the valve disc blocks one end of the closed valve flow channel, and the other end of the closed valve flow channel is connected to the medium outlet.

Further, the valve disc includes a fixed rod, one end of the fixed rod is rotatably connected to the rotating shaft, and the other end is fixedly connected to the valve disc.

Furthermore, the fixed rod has a positioning groove, and when the valve disc rotates to the second limit position, the limiting post is placed in the positioning groove.

Furthermore, the medium inlet has a flange extending inward in the circumferential direction, and the edge of the valve disc facing the medium inlet abuts against the flange.

Further, the valve disc is provided with a guide block on one side toward the inside of the housing. The guide block has a wedge-shaped cross-section. The guide block includes a fixed surface and a guide surface. The guide surface is placed away from the valve disc. At one end of the rotating shaft, the fixed rod is fixedly connected to the fixed surface, and when the valve disc is placed at the second extreme position, the angle between the guide surface and the axis of the medium outlet is an acute angle.

Furthermore, the axis of the medium inlet and the axis of the medium outlet are provided with an included angle of 90°.

Compared with the existing technology, the feed plunger pump used for continuous thermal hydrolysis of sludge described in this invention has the following advantages:

This creation uses a check valve to reduce the backflow of sludge into the plunger pump and reduces the working pressure of the plunger pump. It uses the closed valve flow channel to allow part of the reverse flow sludge to enter the closed valve flow channel, pushing the valve disc downward so that When the valve disc is closed;

A guide block is used, and the guide surface on the guide block is used to guide the counterflow sludge, so that more sludge enters the closed valve flow channel, and when the sludge counterflows, the squeezing effect on the valve disc is increased.

It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments can be combined with each other.

In the description of this creation, it is to be understood that the terms "center", "vertical", "horizontal", "upper", "lower", "front", "back", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and The simplified description does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention. Furthermore, the terms “first”, “second”, etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, features defined by "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of this creation, unless otherwise stated, "plurality" means two or more.

In the description of this creation, it should be noted that, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this creation can be understood through specific situations.

The invention will be described in detail below with reference to the accompanying drawings and embodiments.

The feed plunger pump used for continuous thermal hydrolysis of sludge in this invention includes a pump body 1. The outlet of the pump body 1 is connected with a plurality of check valves 3 in series to gradually prevent the reverse flow of sludge and reduce the flow of sludge. The working pressure of the plunger pump, and the check valve 3 farthest from the pump body 1 includes a housing 2 with a medium inlet 21 and a medium outlet 22. The axial directions of the medium inlet 21 and the medium outlet 22 are perpendicular to each other; the medium inlet 21 and the medium outlet 22 are connected through the flow channel 23; the flow channel 23 is arc-shaped, and the medium inlet 21 and the medium outlet 22 The axis centers are all tangent to the circle where the flow channel 23 is located; the housing 2 also has a closed valve flow channel 28; a rotating shaft 25 is provided on one side of the medium inlet 21, and a valve disc 26 is connected to the The rotating shaft 25 is rotationally connected, and when the valve disc 26 moves to the first limit position, the valve disc 26 can block the medium inlet 21; the housing 2 is also provided with a limiting column 24; the valve closing channel 28 One end is connected to the medium outlet 22, and the other end is connected to the medium inlet 21 around the limiting column 24. When the valve flap 26 moves to the second limit position, the valve flap 26 abuts the limiting column 24; the housing 2 also has a closed valve flow channel 28. When the valve disc 26 moves to the second limit position, the valve disc 26 blocks the end of the closed valve flow channel 28 close to the medium inlet 21. During the working process, when the plunger pump performs stroke operation, the sludge enters the housing 2 from the medium inlet 21 under pressure. At this time, the valve disc 26 is pushed by the sludge to the second extreme position, and the medium inlet 21 is opened. When one stroke of the plunger pump ends, the sludge reverses flow, and part of the sludge enters the closed valve flow channel 28 and pushes the valve disc 26, causing the valve disc 26 to move to the first limit position. The sludge counterflow effect is used to push the valve disc 26. Block the medium inlet 21 to prevent backflow sludge from entering the valve body and affecting the operation of the plunger valve.

The medium inlet 21 has a flange 211 extending inward in the circumferential direction, and the edge of the valve flap 26 facing the medium inlet 21 abuts against the flange 211 . When the valve disc 26 is in the first extreme position, the edge of the valve disc 26 facing the medium inlet 21 abuts against the flange 211 to ensure the blocking effect of the valve disc 26 on the medium inlet 21 . The valve flap 26 is provided with a guide block 29 on one side facing the inside of the housing 2. The guide block 29 has a wedge-shaped cross-section. The guide block 29 includes a fixing surface 292 and a guide surface 291. The guide surface 291 is placed at the end of the valve disc 26 away from the rotating shaft 25. A fixed rod 27 is fixedly connected to the fixed surface 292. When the valve disc 26 is placed in the second extreme position, the guide surface 291 is connected to the medium outlet. The angle between the axes 22 is an acute angle, so that during the counterflow process of sludge, more sludge can enter the closed valve flow channel 28 along the guide surface 291, thereby increasing the thrust on the valve disc 26 during the counterflow process. The other end of the fixed rod 27 is rotatably connected to the rotating shaft 25. There is a positioning groove 271 on the fixed rod 27. When the valve disc 26 rotates to the second limit position, the limiting post 24 is placed in the positioning groove. Within 271.

The feeding plunger pump used in the continuous thermal hydrolysis of sludge described in this invention. During the working process, when the plunger pump performs stroke work, the sludge is pressed into the housing 2 from the medium inlet 21. At this time, the valve disc 26 is pushed by the sludge to the second extreme position, and the positioning groove 271 of the fixed rod 27 presses against the limiting column 24, opening the medium inlet 21; when one stroke of the plunger pump ends, the sludge flows back along the guide surface 291 Enter the closed valve flow channel 28 until the other end of the closed valve flow channel 28 moves to push the valve disc 26, so that the valve disc 26 moves to the first limit position, and utilizes the sludge counterflow effect to push the valve disc 26 to block the medium inlet 21 , to prevent backflow sludge from entering the valve body and affecting the operation of the plunger valve. During this process, the check valve 3 connected in series with the discharge port of the plunger pump intercepts the counterflow sludge step by step, reducing the impact of the counterflow of sludge on the plunger pump. In addition, those skilled in the art should know that when the valve disc 26 is placed at the second extreme position, there is a gap between the valve disc 26 and the closed valve flow channel 28, but this does not affect the sludge pushing the valve in the closed valve flow channel 28. The flap 26 is closed.

The above are only preferred embodiments of this creation and are not intended to limit this creation. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this creation shall be included in this creation. within the scope of protection.

1:Pump body 2: Shell 21:Media import 211:Flange 22:Media outlet 23:Flow channel 24:Limiting column 25:Rotating axis 26: Valve disc 27:Fixed rod 271: Positioning slot 28: Closed valve flow channel 29:Guide block 291:Guide surface 292:Fixed surface 3: Check valve

The drawings that form a part of this creation are used to provide a further understanding of this creation. The schematic embodiments of this creation and their descriptions are used to explain this creation and do not constitute improper limitations on this creation. In the attached picture: Figure 1 is a schematic diagram of the overall structure of the plunger pump; Figure 2 is a schematic structural diagram of the check valve state when sludge flows downstream; Figure 3 is a schematic diagram of the check valve structure when sludge reverses flow; Figure 4 is a schematic diagram of the three-dimensional structure of the valve disc.

1: Pump body

2: Shell

21:Media import

211:Flange

22:Media outlet

23:Flow channel

24:Limiting column

25:Rotating axis

26: Valve disc

27:Fixed rod

271: Positioning slot

28: Closed valve flow channel

29:Guide block

3: Check valve

Claims (6)

A feed plunger pump for continuous thermal hydrolysis of sludge, which includes: a pump body (1), the discharge port of the pump body (1) is provided with a check valve (3); the check valve (3) ) includes a housing (2) with a medium inlet (21) and a medium outlet (22) and a flow channel (23) connecting the medium inlet (21) and the medium outlet (22), A rotating shaft (25) is provided on one side of the medium inlet (21), and a valve disc (26) is rotationally connected to the rotating shaft (25). When the valve disc (26) rotates to the first limit position, the valve disc (26) (26) can block the medium inlet (21); the housing (2) is also provided with a limiting column (24). When the valve disc (26) moves to the second limit position, the valve disc (26) Against the limiting post (24), a closed valve flow channel (28) is also opened in the housing (2). When the valve disc (26) moves to the second limit position, the valve disc (26) (26) Block one end of the closed valve flow channel (28), and the other end of the closed valve flow channel (28) is connected with the medium outlet (22). The feed plunger pump for continuous thermal hydrolysis of sludge as described in claim 1, wherein the valve disc (26) includes a fixed rod (27), and one end of the fixed rod (27) rotates with the rotating shaft (25) connection, and the other end is fixedly connected to the valve disc (26). The feed plunger pump for continuous thermal hydrolysis of sludge as described in claim 2, wherein the fixed rod (27) is provided with a positioning groove (271). When the valve disc (26) rotates to the second At the limit position, the limiting column (24) is placed in the positioning groove (271). The feed plunger pump for continuous thermal hydrolysis of sludge as described in claim 1, wherein the medium inlet (21) extends inwards with a flange (211), and the valve disc (26) faces the medium The edge on one side of the entrance (21) abuts the flange (211). The feed plunger pump for continuous thermal hydrolysis of sludge as described in claim 2, wherein the valve disc (26) is provided with a guide block (29) on one side facing the inside of the housing (2), and the guide block (29) The cross-section of (29) is wedge-shaped. The guide block (29) includes a fixed surface (292) and a guide surface (291). The guide surface (291) is placed at the end of the valve disc (26) away from the rotating shaft (25). The fixed rod (27) is fixed to the fixed surface (292), and when the valve disc (26) is placed at the second limit position, the angle between the axis of the guide surface (291) and the medium outlet (22) is an acute angle. The feed plunger pump for continuous thermal hydrolysis of sludge as described in claim 1, wherein the axis of the medium inlet (21) and the axis of the medium outlet (22) are provided with an included angle of 90°.