Advanced treatment process for diluted multi-source water

Abstract

The invention discloses an advanced treatment process for diluted multi-source water, and relates to the technical field of water pollution control and treatment. The sedimentation tank is provided with a water inlet pipe, a sludge outlet pipe and an effluent weir, inclined plate filler is arranged at the upper part of the water inlet pipe in the sedimentation tank, the sludge outlet pipe of the sedimentation tank is connected with a screw pump inlet, and a screw pump outlet is connected with a sludge concentration mechanism. The device has the beneficial effects that the left filter and the right filter which are switched to work are arranged, so that settled sludge can be continuously filtered, the water content of the sludge is reduced, and the subsequent treatment pressure is relieved; the sludge discharge channel is opened or closed by using the pressure difference between the upper and lower parts of the filter screen, the filter screen is backwashed, and the trigger assembly is arranged, so that the working states of the left filter and the right filter are automatically switched, manual operation is not needed, and the operation reliability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of water pollution control and treatment, and in particular to a process for deep treatment of dilute multi-source water. Background Art

[0002] Since the oil field entered the ternary production period, a large amount of water is needed to prepare and dilute the polymer mother liquor. Generally, tap water is used as the water source. The water source is single and the cost is high. There are many lakes in the Daqing Oilfield area. Some preparation stations are close to lakes. Lake water can be extracted during the rainy season to solve the water source problem. Extracting water from the lake as the water source for preparing the polymer mother liquor can save water costs and reduce the sludge content in the lake, alleviating the pressure of water pollution control and treatment in the lake, and reducing the preparation cost at the same time. The lake water needs to be sedimented before it can be used as the water source for preparing the polymer mother liquor. Due to the high sludge content in the sewage, the sludge water content generated by ordinary sedimentation measures is high, which brings pressure to subsequent treatment. Summary of the Invention

[0003] In order to solve the problem of high sludge moisture content when using lake water polymer mother liquor to prepare water source, the present invention provides a dilution multi-source water deep treatment process.

[0004] The technical solution provided by the present invention is: a dilute multi-source water deep treatment process, comprising a sedimentation tank, the sedimentation tank being provided with a water inlet pipe, a mud outlet pipe and a water outlet weir, an inclined plate filler being provided on the upper part of the water inlet pipe in the sedimentation tank, the mud outlet pipe of the sedimentation tank being connected to the inlet of a screw pump, and the outlet of the screw pump being connected to a sludge thickening mechanism; The sludge thickening mechanism includes a three-way ball valve. The inlet of the three-way ball valve is connected to the screw pump through a pipe. The two outlets of the three-way ball valve are connected to the left pipe and the right pipe respectively. The left pipe is connected to the left filter, and the right pipe is connected to the right filter. The left filter and the right filter have the same structure. The structure of the left filter is explained below using the left filter as an example: The left filter includes a cylindrical tank body, a mud inlet pipe is provided on the top of the tank body, the mud inlet pipe is connected to the left pipe, a filter screen is fixedly connected to the middle of the tank body, a drain pipe is provided at the bottom of the filter screen, the drain pipe is extended upward to exceed the height of the left pipe and then arranged horizontally, a mud discharge pipe is welded in the center of the bottom of the tank body, the mud discharge pipe extends into the tank body, a step hole is opened from the lower end face of the center of the filter screen, a through hole with a smaller diameter is opened on the upper part of the step hole, a switch valve head is provided in the center of the filter screen, a spherical ring surface is provided on the outer circle of the switch valve head, and the filter screen is on the through hole A spherical ring groove is processed on the bottom, and the switch valve head is sealed with the spherical ring groove of the filter screen through the spherical ring surface. An extension pipe is provided at the lower part of the switch valve head, which passes through the through hole and is inserted into the mud discharge pipe. The extension pipe and the mud discharge pipe are matched through a sealing ring gap. A switch piston is provided at the position of the step hole and the extension pipe. The switch piston and the step hole are matched through a sealing ring gap. A center pipe is provided at the center of the switch piston. The center pipe and the extension pipe are matched through a sealing ring gap. The bottom of the filter screen is connected to a limit sleeve by a bolt, and the limit sleeve prevents the switch piston from falling. The upper part of the extension tube of the switch valve head is provided with windows evenly distributed around the circumference and connected to its inner hole. The top of the center tube is fixedly connected to the support legs. The filter screen is provided with a pressure hole that passes through from top to bottom at the position of the switch piston. The three-way ball valve is equipped with a valve handle. When the valve handle is located at the left position, the left filter is connected to the screw pump. When the valve handle is located at the right position, the right filter is connected to the screw pump.

[0005] A transverse hole is opened on the tank body, which is located on the upper side of the filter screen. The tank body is provided with a trigger assembly on the outer side of the transverse hole. The trigger assembly includes a cylinder sleeve. The inner side of the cylinder sleeve is sealed and welded to the tank body. The trigger piston is connected to the cylinder sleeve through the gap fit of the sealing ring. The outer side of the trigger piston is fixedly connected to the push rod. The outer side of the cylinder sleeve is connected to the pressure cover by bolts. A compression spring is provided between the trigger piston and the pressure cover. After the push rod extends out of the pressure cover, it is connected to the top plate. The left and right top plates extend to the left and right sides of the valve handle of the three-way ball valve.

[0006] The upper hinge of the valve handle of the three-way ball valve is connected to the rotating axis A, and the bottom hinge of the valve body of the three-way ball valve is connected to the rotating axis B. A compression spring is provided between the rotating axis A and the rotating axis B. The rotating axis A and the rotating axis B are both fixedly connected to the compression spring. When the valve handle is in the middle position, the compression spring is compressed to the maximum extent, and the outer end of the valve handle is fixedly connected to the ball.

[0007] The upper end surface of the filter screen is a conical ring surface, and the conical ring surface has a downslope structure from the outer circle to the center.

[0008] The beneficial effects of the present invention are as follows: sewage is extracted from the lake and treated and used as a water source for diluting the polymer mother liquor, thereby alleviating the pressure of water pollution control and treatment of the lake, reducing the sludge content in the lake, and improving the water quality of the lake; a sludge concentration mechanism is set after sedimentation, so that the moisture content of the treated sludge is greatly reduced, reducing the pressure of subsequent treatment; two left filters and right filters that switch between each other are set in the sludge concentration mechanism, so that the settled sludge can be continuously filtered and dehydrated; by setting a high water level drain pipe, a switch piston and a switch valve head are set on the filter screen, and the pressure difference between the upper and lower parts of the filter screen is used to open or close the sludge discharge channel, and the filter screen is backwashed at the same time; a trigger component is set to automatically switch the working state between the left filter and the right filter, without the need for manual operation, and the operation reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attachment Figure 1 It is a structural schematic diagram of the present invention; Attachment Figure 2 It is a structural schematic diagram of the mud discharge mechanism in the present invention; Attachment Figure 3 It is a structural schematic diagram of the left filter in the present invention; Attachment Figure 4 This is a schematic structural diagram of the rising piston of the right filter switch in the present invention; Attachment Figure 5 It is attached Figure 4 A magnified view of point A; Attachment Figure 6 A schematic structural diagram of the trigger component in the present invention; Attachment Figure 7 It is a structural diagram of the three-way ball valve in the present invention; Attachment Figure 8 It is a structural diagram of the filter screen in the present invention; Attachment Figure 9 It is a structural schematic diagram of the switch valve head in the present invention; Attachment Figure 10 It is a structural diagram of the switch piston in the present invention.

[0010] In the figure: 1-sedimentation tank, 2-water inlet pipe, 3-water outlet weir, 4-inclined plate filler, 5-mud outlet pipe, 6-screw pump, 7-sludge thickening mechanism, 8-three-way ball valve, 801-valve handle, 802-ball, 9-left pipe, 10-right pipe, 11-left filter, 12-right filter, 13-tank, 14-filter screen, 141-step hole, 142-through hole, 143-spherical ring groove, 144-conical ring surface, 15-mud inlet pipe, 16-drain pipe, 17-mud discharge pipe, 18-switch piston, 181-center tube, 182-support leg, 19-switch valve head, 191-spherical annulus, 192-extension tube, 193-window, 20-limit sleeve, 21-pressure hole, 22-transverse hole, 23-trigger assembly, 231-cylinder liner, 232-trigger piston, 233-pressure cover, 234-top rod, 235-top plate, 24-rotation axis A, 25-rotation axis B. DETAILED DESCRIPTION

[0011] like Figures 1 to 10 As shown, the dilute multi-source water deep treatment process includes a sedimentation tank 1, which is provided with an inlet pipe 2, a mud outlet pipe 5 and a water outlet weir 3. An inclined plate filler 4 is provided on the upper part of the water inlet pipe 2 in the sedimentation tank 1. The mud outlet pipe 5 of the sedimentation tank 1 is connected to the inlet of a screw pump 6, and the outlet of the screw pump 6 is connected to a sludge thickening mechanism 7. When lake water is used as a water source, the total sludge content is large and the sludge water content is high, so the present invention sets a sludge concentration mechanism 7 at the sludge outlet of the sedimentation tank.

[0012] The sludge thickening mechanism 7 includes a three-way ball valve 8. The inlet of the three-way ball valve 8 is connected to the screw pump 6 through a pipeline. The two outlets of the three-way ball valve 8 are respectively connected to the left pipeline 9 and the right pipeline 10. The left pipeline 9 is connected to the left filter 11, and the right pipeline 10 is connected to the right filter 12. The left filter 11 and the right filter 12 have the same structure. The structure of the left filter 11 is described below as an example: The left filter 11 includes a cylindrical tank body 13. A mud inlet pipe 15 is provided at the top of the tank body 13. The mud inlet pipe 15 is connected to the left pipe 9. A filter screen 14 is fixedly connected to the middle of the tank body 13. A drain pipe 16 is provided below the filter screen 14. The drain pipe 16 extends upward to a height exceeding the left pipe 9 and is then arranged horizontally so that the drain pipe 16 is vertically filled with filtered water, which serves as backwash water when the filter screen 14 is drained. The water level in the drain pipe 16 serves as the water pressure source for the backwash water. The bottom center of the tank body 13 is sealed and welded with a mud discharge pipe 17, which extends into the tank body 13. A step hole 141 is opened from the lower end surface of the center of the filter screen 14. The filter screen 14 has a through hole 142 with a smaller diameter on the upper part of the step hole 141. A switch valve head 19 is provided at the center of the filter screen 14. The outer circle of the switch valve head 19 is provided with a spherical annular surface 191. The filter screen 14 is processed with a spherical annular groove 143 on the upper part of the through hole 142. The switch valve head 19 is sealed with the spherical annular surface 191 and the spherical annular groove 143 of the filter screen 14. The lower part of the switch valve head 19 An extension tube 192 is provided, which passes through the through hole 142 and is inserted into the mud discharge pipe 17. The extension tube 192 and the mud discharge pipe 17 are fitted together by a sealing ring gap. A switch piston 18 is provided at the position of the step hole 141 and the extension tube 192. The switch piston 18 and the step hole 141 are fitted together by a sealing ring gap. A center tube 181 is provided at the center of the switch piston 18. The center tube 181 and the extension tube 192 are fitted together by a sealing ring gap. The bottom of the filter screen 14 is connected to a limit sleeve 20 by a bolt. The limit sleeve 20 prevents the switch piston 18 from falling. The extension tube 192 of the switch valve head 19 has windows 193 evenly distributed around the circumference on the upper part thereof, which are connected to the inner hole of the extension tube 192. The top of the center tube 181 is fixedly connected to the support leg 182. The filter screen 14 has a vertically penetrating pressure hole 21 at the position of the switch piston 18 for transmitting the pressure above the filter screen. During normal filtration, the screw pump 6 increases pressure, and the sewage containing sludge enters the left filter 11 for filtration. The sludge is retained above the filter screen 14, and the valve position of the three-way ball valve 8 is changed. The water inlet channel of the left filter 11 is closed, and the water level of the drain pipe 16 is higher than the water level in the filter 11. The reverse pressure pushes the switch piston 18 upward, and the switch piston 18 rises to lift the switch valve head 19. The sludge enters the sludge discharge pipe 17 through the window 193 and is discharged. At the same time, the filtered water in the drain pipe backwashes the filter screen, achieving the effect of automatically draining and backwashing the filter screen 14 without manual operation. When the filtered water level in the drain pipe 16 drops to the same level as the water level in the left filter 11, the switch piston 18 and the switch valve head 19 drop under the action of their own weight, closing the mud discharge channel, and the clean filter screen 14 waits for the next filtration; The three-way ball valve 8 is installed with a valve handle 801. When the valve handle 801 is located at the left position, the left filter 11 is connected to the screw pump 6. When the valve handle 801 is located at the right position, the right filter 12 is connected to the screw pump 6.

[0013] The sludge settled in the sedimentation tank 1 is pressurized by the screw pump 6 and enters the left filter 11. When the sludge layer on the top of the filter screen 14 is thick enough, for example, the outlet pressure of the screw pump 6 increases, the valve handle 801 is turned to connect the screw pump 6 with the right filter 12 for filtration, and the mud inlet channel of the left filter 11 is closed. At this time, the pressure above the filter screen 14 disappears, and the pressure of the high water level in the drain pipe 16 causes the switch piston 18 to rise. The switch piston 18 rises and lifts the switch valve head 19 to open the mud discharge channel. The sludge flows through the gap between the support legs 182 of the central pipe 181 into the window 13 of the extension pipe 192 and is discharged into the mud discharge pipe 17. The water in the drain pipe 16 flows from the bottom of the filter screen 14 to the upper part to backwash the filter screen 14 until the pressure difference between the upper and lower parts of the filter screen 14 disappears, and the switch piston 18 descends to close the mud discharge channel.

[0014] A transverse hole 22 is opened on the tank body 13, and the transverse hole 22 is located on the upper side of the filter screen 14. The tank body 13 is provided with a trigger assembly 23 on the outside of the bypass hole 22. The trigger assembly 23 includes a cylinder sleeve 231. The inner side of the cylinder sleeve 231 is sealed and welded to the tank body 13. The inside of the cylinder sleeve 231 is connected to the trigger piston 232 through the gap fit of the sealing ring. The outside of the trigger piston 232 is fixedly connected to the push rod 234. The outside of the cylinder sleeve 231 is connected to the pressure cover 233 by bolts. A compression spring is provided between the trigger piston 232 and the pressure cover 233. After the push rod 234 extends out of the pressure cover, it is connected to the top plate 235. The left and right top plates 235 extend to the left and right sides of the valve handle 801 of the three-way ball valve 8.

[0015] For example, when the sludge layer on the upper part of the filter screen 14 of the left filter 11 is thick enough, the pressure increased by the screw pump 6 to the upper part of the filter screen 14 increases, and the pressure pushes the trigger piston 232 to move outward, pushing the valve handle 801 of the three-way ball valve 8 to rotate to the right, thereby closing the mud inlet channel of the left filter 11 and opening the mud inlet channel of the right filter 12. By arranging a trigger assembly 23 on the two tank bodies 13, the left filter 11 and the right filter 12 can be automatically switched without manual operation. By replacing the compression spring of the trigger assembly 23, the switching pressure can also be adjusted.

[0016] By setting up two left filters 11 and right filters 12 that switch between each other, the settled sludge can be filtered continuously, the water content of the sludge is reduced, and the pressure of subsequent treatment is alleviated. By setting up a high water level drain pipe 16, a switch piston 18 and a switch valve head 19 are set on the filter screen 14, and the pressure difference above and below the filter screen 14 is used to open or close the sludge discharge channel, and the filter screen 14 is backwashed at the same time. A trigger component 23 is set to automatically switch the working state between the left filter 11 and the right filter 12 without manual operation, and the operation reliability is high.

[0017] The valve handle 801 of the three-way ball valve 8 is hingedly connected to the rotation axis A24, and the bottom of the valve body of the three-way ball valve 8 is hingedly connected to the rotation axis B25. A compression spring is provided between the rotation axis A24 and the rotation axis B25, and the rotation axis A24 and the rotation axis B25 are both fixedly connected to the compression spring. When the valve handle 801 is in the middle position, the compression spring is compressed to the maximum extent, and the outer end of the valve handle 801 is fixedly connected to the ball 802. The above structure allows the valve handle 801 to be in only the left or right position. When the top plate 235 pushes the valve handle 801, as long as the valve handle 801 is pushed beyond the middle position, the expansion of the compression spring causes the valve handle 801 to continue to rotate forward until it rotates to the on / off valve position. When the valve handle 801 is in the middle position, the compression spring is compressed to the maximum extent, making the valve handle 801 most stable at both side positions and most unstable at the center position. Therefore, as long as the piston 232 is triggered to push the valve handle 801 beyond the center position, the compression spring can push the valve handle 801 to another valve position, switching the sludge liquid inlet channel.

[0018] The upper end surface of the filter screen 14 is a conical ring surface 144, and the conical ring surface 144 is a downslope structure from the outer circle to the center. During filtering, the sludge flows toward the center, and the filter screen 14 is cleaner during sludge discharge and backwashing.

Claims

1. A process for deep treatment of dilute multi-source water, comprising a sedimentation tank 1, characterized in that: The sedimentation tank (1) is provided with a water inlet pipe (2), a mud outlet pipe (5) and a water outlet weir (3); an inclined plate filler (4) is provided on the upper portion of the water inlet pipe (2) in the sedimentation tank (1); the mud outlet pipe (5) of the sedimentation tank (1) is connected to the inlet of a screw pump (6); and the outlet of the screw pump (6) is connected to a sludge thickening mechanism (7); The sludge concentration mechanism (7) includes a three-way ball valve (8). The inlet of the three-way ball valve (8) is connected to the screw pump (6) through a pipeline. The two outlets of the three-way ball valve (8) are connected to the left pipeline (9) and the right pipeline (10) respectively. The left pipeline (9) is connected to the left filter (11), and the right pipeline (10) is connected to the right filter (12). The left filter (11) and the right filter (12) have the same structure. The structure is described below by taking the left filter (11) as an example: The left filter (11) includes a cylindrical tank body (13). A mud inlet pipe (15) is provided on the top of the tank body (13). The mud inlet pipe (15) is connected to the left pipe (9). The middle of the tank body (13) is fixedly connected to the filter screen (14). The tank body (13) is provided with a drain pipe (16) below the filter screen (14). The drain pipe (16) extends upward to a height exceeding the left pipe (9) and is then horizontally arranged. The bottom center of the tank body (13) is sealed. A mud discharge pipe (17) is welded to the tank body (13). The mud discharge pipe (17) extends into the tank body (13). A step hole (141) is opened at the center of the filter screen (14) from the lower end surface. A through hole (142) with a smaller diameter is opened at the upper part of the step hole (141). A switch valve head (19) is provided at the center of the filter screen (14). A spherical ring surface (191) is provided on the outer circle of the switch valve head (19). The filter screen (14) is opened at the through hole (142). ) is processed with a spherical annular groove (143) on the upper part, the switch valve head (19) is sealed with the spherical annular groove (143) of the filter screen (14) through the spherical annular surface (191), and an extension pipe (192) is provided at the lower part of the switch valve head (19). The extension pipe (192) passes through the through hole (142) and is inserted into the mud discharge pipe (17). The extension pipe (192) and the mud discharge pipe (17) are matched through a sealing ring gap. A switch piston (18) is provided at the position of the step hole (141) and the extension pipe 192. The switch piston (18) and the step hole (141) are matched through a sealing ring gap. A center pipe (181) is provided at the center of the switch piston (18). The center pipe (181) and the extension pipe (192) are matched through a sealing ring gap. The bottom of the filter screen (14) is connected to a limit sleeve (20) by bolts. The limit sleeve (20) prevents the switch piston (18) from falling. The extension tube (192) of the switch valve head (19) is provided with windows (193) evenly distributed around the circumference on the upper part thereof and connected to the inner hole thereof. The top of the central tube (181) is fixedly connected to the support leg (182). The filter screen (14) is provided with a pressure hole (21) which is through-and-through at the position of the switch piston (18). The three-way ball valve (8) is equipped with a valve handle (801). When the valve handle (801) is located at the left position, the left filter (11) is connected to the screw pump (6). When the valve handle (801) is located at the right position, the right filter (12) is connected to the screw pump (6).

2. The process for deep treatment of dilute multi-source water according to claim 1, characterized in that: A transverse hole (22) is opened on the tank body (13), and the transverse hole (22) is located on the upper side of the filter screen (14). The tank body (13) is provided with a trigger assembly (23) outside the bypass hole (22). The trigger assembly (23) includes a cylinder sleeve (231). The inner side of the cylinder sleeve (231) is sealed and welded to the tank body (13). The cylinder sleeve (231) is connected to the trigger piston (232) through a sealing ring clearance fit. The outer side of the trigger piston (232) is fixedly connected to the push rod (234). The outer side of the cylinder sleeve (231) is connected to the pressure cover (233) through bolts. A compression spring is provided between the trigger piston (232) and the pressure cover (233). The push rod (234) extends out of the pressure cover and is connected to the top plate (235). The left and right top plates (235) extend to the left and right sides of the valve handle (801) of the three-way ball valve (8).

3. The process for deep treatment of dilute multi-source water according to claim 1, characterized in that: The valve handle (801) of the three-way ball valve (8) is hingedly connected to the rotation axis A (24), and the bottom of the valve body of the three-way ball valve (8) is hingedly connected to the rotation axis B (25). A compression spring is provided between the rotation axis A (24) and the rotation axis B (25). The rotation axis A (24) and the rotation axis B (25) are both fixedly connected to the compression spring. When the valve handle (801) is located in the middle position, the compression spring is compressed to the maximum extent, and the outer end of the valve handle (801) is fixedly connected to the ball (802).

4. The process for deep treatment of dilute multi-source water according to claim 1, characterized in that: The upper end surface of the filter screen (14) is a conical ring surface (144), and the conical ring surface (144) presents a downslope structure from the outer circle to the center.

Images