Plant flushing water drainage device and system

Abstract

The invention discloses a factory building flushing water drainage device and system, the device comprises: a water tank, which is arranged above a leachate collection tank and below a low point of a drainage ditch, the water tank being provided with a low liquid level of the water tank and a high liquid level of the water tank; a water inlet pipe, which is fixed on the top of the water tank, the inlet end of the water inlet pipe being located outside the water tank and below the low point of the drainage ditch, and the outlet end of the water inlet pipe extending into the water tank; a water replenishment pipe, on which a float valve is installed, when the water level in the water tank reaches the low liquid level of the water tank, the float valve is opened to replenish water into the water tank, when the liquid level in the water tank reaches the high liquid level of the water tank, the float valve is closed, and the height of the low liquid level of the water tank is higher than the outlet end of the water inlet pipe; a maintenance valve, a check valve and a float valve are arranged on the water replenishment pipe; an overflow pipe, the outlet end of the overflow pipe enters the leachate collection tank, and the outlet end of the overflow pipe is lower than the low liquid level of the leachate in the leachate collection tank. The invention can ensure that inflammable and explosive odors will not leak, and eliminates the easy blockage points due to the elimination of the water trap.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a plant flushing water drainage device and system. Background Art

[0002] In the waste incineration treatment project, water will be used to flush the unloading hall after incineration. The water quality of the flushing water after flushing is poor and should be discharged into the leachate collection system. It should be discharged or reused after being treated by the leachate treatment system. The drainage ditch and drainage pipe of the unloading hall are usually equipped with a mesh frame floor drain and a water trap, which terminates in the leachate collection pool. The mesh frame floor drain is set to prevent garbage from entering the drainage pipe, and the water trap is set to prevent the flammable and explosive odor from the leachate collection pool from leaking into the unloading hall. However, in the actual operation of the project, the setting of the mesh frame floor drain and the water trap often causes blockage, and the water seal in the water trap is easily damaged, causing flammable and explosive odor to reach the unloading hall, resulting in poor air quality in the unloading hall and safety hazards.

[0003] There are two main ways to discharge flushing water from the unloading hall of a waste incineration project.

[0004] 1. Drill a hole at the door stop of the unloading door and set a slope on the unloading platform to discharge the flushing water directly into the garbage pit. This method is simple and easy and suitable for small-scale garbage disposal projects. The single-sided slope of the unloading platform should not be too large.

[0005] 2. For large-scale waste incineration projects, when the width of the unloading hall is too large, the slope is too large to discharge the flushing water by setting a single slope, which is not feasible in terms of construction. Therefore, a drainage ditch is set in the middle of the unloading platform, and the flushing water is discharged into the garbage leachate collection pool after passing through the drainage ditch. A mesh frame floor drain and a water trap are set at the low point of the drainage ditch. Summary of the invention

[0006] To solve the above problems, the present invention discloses a factory building flushing water drainage device, comprising: a water tank, which is arranged above a leachate collection tank and below the low point of a drainage ditch, the water tank being provided with a low liquid level of the water tank and a high liquid level of the water tank; a water inlet pipe, which is fixed on the top of the water tank, the inlet end of the water inlet pipe being located outside the water tank and below the low point of the drainage ditch, and the outlet end of the water inlet pipe extending into the water tank; a water replenishment pipe, on which a float valve is installed, when the water level in the water tank reaches the low liquid level of the water tank, the float valve opens to replenish water into the water tank, and when the liquid level in the water tank reaches the high liquid level of the water tank, the float valve closes, and the height of the low liquid level of the water tank is higher than the outlet end of the water inlet pipe; a maintenance valve, a check valve and a float valve are arranged on the water replenishment pipe; an overflow pipe, the outlet end of the overflow pipe enters the leachate collection tank, and the outlet end of the overflow pipe is lower than the low liquid level of the leachate in the leachate collection tank.

[0007] Optionally, an automatic exhaust valve is provided on the top of the water tank.

[0008] Optionally, a check valve is further provided upstream of the float valve on the water supply pipe.

[0009] Optionally, a maintenance valve capable of opening and closing the water supply pipe is also provided upstream of the check valve on the water supply pipe.

[0010] Optionally, an inspection hole is also provided on the top of the water tank.

[0011] Optionally, a vent pipe is also provided at the bottom of the side of the water tank.

[0012] Optionally, a mesh frame floor drain is provided at the low point of the drainage ditch.

[0013] The present invention also discloses a factory flushing water drainage system, comprising a plurality of the above-mentioned factory flushing water drainage devices, wherein any water supply pipe is connected to a reused water supply pipe.

[0014] The present invention has the following technical effects:

[0015] (1) Ensure that flammable and explosive odors do not leak into the unloading hall: Install a water tank, liquid level gauge and automatic water replenishment pipeline in the leachate lifting pump room to ensure the water level in the water tank. The low liquid level in the water tank will submerge the outlet of the drainage pipe.

[0016] (2) The drainage device is not easy to be clogged: a mesh frame floor drain is installed at the low point of the drainage ditch, and the drainage pipe is not equipped with a water trap, eliminating the easy clogging points of the commonly used drainage device.

[0017] (3) Inspection and maintenance are infrequent, convenient and safe: A float valve is used on the water tank water supply pipe. When the liquid level is low, the water supply valve will automatically open to replenish water, and the water supply source is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above-mentioned features and technical advantages of the present invention will become clearer and easier to understand by describing its embodiments in conjunction with the following drawings.

[0019] Figure 1 Schematic diagram of a plant flushing water drainage device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The following will describe embodiments of the plant flushing water drainage device and system of the present invention with reference to the accompanying drawings. It will be appreciated by those skilled in the art that the described embodiments may be modified in various ways or combinations thereof without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims. In addition, in this specification, the drawings are not drawn to scale and the same reference numerals represent the same parts.

[0021] The plant flushing water drainage device can be used for the drainage treatment of flushing water in the unloading hall of the waste incineration project, and can also be used for the drainage treatment of flushing water in other spaces.

[0022] The factory flushing water drainage device of this embodiment includes a water tank 1, a water inlet pipe 6, a water supply pipe 2, a check valve 3, a check valve 4, a float valve 5 are arranged on the water supply pipe 2, and an automatic exhaust valve 8 is arranged on the top of the water tank 1. The water tank 1 is arranged above the leachate collection pool and below the factory floor. The water inlet pipe 6 is fixed on the top of the water tank 1. The inlet end of the water inlet pipe 6 is located outside the water tank 1 and below the factory floor, for example, below the low point of the drainage ditch, so that the flushing water can enter the water tank 1 through the water inlet pipe. The outlet end of the water inlet pipe 6 extends into the water tank 1. A water supply pipe 2 is also arranged on the water tank 1, and the water supply water source should be taken from a stable and reliable non-drinking water source in the waste incineration plant. A float valve 5 is installed on the water supply pipe 2, and the float valve 5 is opened or closed by the water tank liquid level control. When the water level in the water tank 1 reaches the low liquid level B of the water tank, the float valve 5 on the water supply pipe 2 is controlled to open and water is supplied to the water tank 1. In addition, the height of the low liquid level B of the water tank is higher than the outlet end of the water inlet pipe 6, so that the liquid level in the water tank 1 always submerges the outlet end of the water inlet pipe, ensuring that flammable and explosive odors will not leak into the factory. When the liquid level in the water tank 1 reaches the high liquid level C of the water tank, the float valve 5 is closed, so that the water supply pipe 2 stops replenishing water. An overflow pipe 7 is also provided above the high liquid level C of the water tank, and the outlet end of the overflow pipe 7 enters the leachate collection tank, and the outlet end of the overflow pipe 7 is lower than the low liquid level D of the leachate collection tank. When the flushing water is discharged, it is first discharged into the water tank 1 through the water inlet pipe 6, and after reaching the overflow liquid level A of the overflow pipe, it is discharged to the leachate collection tank through the overflow pipe 7.

[0023] Furthermore, a check valve 4 is provided on the water supply pipe 2, which is arranged upstream of the float valve 5. The upstream refers to the upstream side of the water flow along the water supply flow direction. The check valve 4 prevents sewage from flowing back to the water supply system in extreme cases.

[0024] Furthermore, a maintenance valve 3 is provided upstream of the check valve 4 for closing the water supply pipe 2 during maintenance.

[0025] Furthermore, a manhole 9 is provided, which is located at the top of the water tank 1 , and a detachable cover may be provided on the manhole 9 .

[0026] Furthermore, a vent pipe 10 is provided, which is located at the bottom of the side of the water tank 1 and is used for inspecting and cleaning the water tank.

[0027] Furthermore, an automatic exhaust valve 8 is provided on the top of the water tank 1 , and when the pressure in the water tank 1 is too high, the gas is discharged through the automatic exhaust valve 8 .

[0028] Furthermore, a mesh frame floor drain is provided at the low point of the drainage ditch to filter out large pieces of garbage.

[0029] It should be noted that there may be multiple factory flushing water drainage devices distributed in the factory to achieve the purpose of simultaneous and rapid drainage.

[0030] The working process of the flushing water drainage device of the plant is described below: when the plant is flushed, the flushing water is discharged into the water tank 1 through the water inlet pipe 6. When the water level reaches the height of the overflow pipe, the sewage in the water tank is discharged to the leachate collection tank through the overflow pipe 7. When the liquid level in the water tank reaches the low liquid level of the water tank, the float valve 5 is opened to replenish water so that the liquid level in the water tank always submerges the outlet of the drainage pipe. When the liquid level in the water tank reaches the high liquid level of the water tank, the float valve 5 is closed. When the pressure in the water tank 1 is too high, the gas is discharged through the automatic exhaust valve 8.

[0031] A specific example of the present invention is described below with a certain project design:

[0032] The bottom elevation of the leachate collection pool is -9.000m, the low level of the leachate is -8.500m, the overflow pipe 7 uses UPVC pipe, DN100, the outlet elevation is -8.700m, submerged 0.200m below the low level of the leachate. The elevation of the inlet is the overflow level (-2.700m).

[0033] Water tank 1 is set in leachate lifting pump room E, made of plastic, with a bottom elevation of -3.500m. The height of the water tank is 1.000m, the low liquid level of the water tank (float valve open liquid level) is -3.200m, the high liquid level of the water tank (float valve closed liquid level) is -2.800m, and the top elevation of the water tank is -2.500m.

[0034] The water supply pipe 2 can be connected to the reused water supply pipeline. The reused water supply unit is a variable frequency speed regulation water supply equipment, which can ensure the stability of the water source for replenishing the liquid storage tank; the reused water supply unit is set in the comprehensive water pump room, and the water pump parameter is Q=50m 3 / h, H = 45m; the diameter of the water supply pipe 2 is DN25, on which a float valve 5, a check valve 4 and a check valve 3 are installed in sequence. When the pressure in the water tank 1 is too high, the gas is discharged through the automatic exhaust valve 8. A check hole 9 (diameter 600mm) and a vent pipe 10 (DN100) are provided on the top of the water tank 1. A vent valve is provided on the vent pipe 10. When cleaning the water tank, open the vent valve to discharge the mud at the bottom of the water tank.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plant flushing water drainage device, characterized in that: include: A water tank is arranged above the leachate collection tank and below the low point of the drainage ditch, and the water tank is provided with a low liquid level of the water tank and a high liquid level of the water tank; A water inlet pipe is fixed on the top of the water tank, the inlet end of the water inlet pipe is located outside the water tank and below the lowest point of the drainage ditch, and the outlet end of the water inlet pipe extends into the water tank; A water supply pipe, on which a float valve is installed. When the water level in the water tank reaches a low liquid level of the water tank, the float valve opens to supply water to the water tank. When the liquid level in the water tank reaches a high liquid level of the water tank, the float valve closes. In addition, the height of the low liquid level of the water tank is higher than the outlet end of the water inlet pipe. The water supply pipe is equipped with a check valve, a check valve and a float valve. An overflow pipe, the outlet end of which enters the leachate collection tank, and the outlet end of the overflow pipe is lower than the low liquid level of the leachate in the leachate collection tank, There is an automatic exhaust valve on the top of the water tank. A check valve is also arranged upstream of the float valve on the water supply pipe.

2. The plant flushing water drainage device according to claim 1, characterized in that: A check valve capable of opening and closing the water supply pipe is also arranged upstream of the check valve on the water supply pipe.

3. The plant flushing water drainage device according to claim 1, characterized in that: A manhole is also provided on the top of the water tank.

4. The plant flushing water drainage device according to claim 1, characterized in that: A vent pipe is also provided at the bottom of the side of the water tank.

5. The plant flushing water drainage device according to claim 1, characterized in that: A mesh frame floor drain is provided at the low point of the drainage ditch.

6. A factory flushing water drainage system, characterized in that: The invention comprises a plurality of plant flushing water drainage devices as described in any one of claims 1 to 5, wherein any water supply pipe is connected to a reused water supply pipe.

Images