Leachate diversion and confluence structure

Abstract

The utility model discloses a percolate diversion and confluence structure which comprises a diversion pipe, a U-shaped pipe and a collecting pipe which are sequentially communicated, the diversion pipe is used for guiding percolate flowing out of a garbage hopper into the collecting pipe, the U-shaped pipe is used for isolating air between the diversion pipe and the collecting pipe, and the collecting pipe is used for collecting the percolate into a percolate pool. According to the structure, a water seal structure can be built through the U-shaped pipe between the percolate flow guide pipe and the collecting pipe, the water seal structure is used for isolating the space below the pusher from the collecting pipe so as to isolate combustible gas from flames, explosion is avoided, water used for water seal comes from the percolate, additional adding is not needed, discharging of the percolate is not affected, and the structure is simple and convenient. On the basis of a U-shaped pipe communication principle, static pressure is formed by utilizing a water column existing in a U-shaped pipe, the static pressure and negative pressure in the garbage combustion furnace are mutually counteracted to achieve force balance, and then when leachate flows down from the upper part, the balance is broken to achieve the purpose of drainage. The design is ingenious, the structure is simple, and parts are convenient to machine, install and use.

Description

Technical Field

[0001] The utility model belongs to the technical field of garbage leachate treatment equipment, and in particular relates to a leachate diversion and confluence structure. Background Art

[0002] A leachate diversion and confluence structure is arranged below the pusher of the waste incinerator. The leachate in the garbage hopper flows into the leachate diversion pipe through the leachate diversion hopper, then flows into the leachate diversion mother pipe (i.e., the leachate collection pipe), and finally flows into the leachate pool. At present, the leachate diversion hopper is directly connected to the leachate collection pipe through the leachate diversion pipe. There is only one manual valve in the middle of the leachate diversion pipe for maintenance and isolation. During normal operation, the manual valve is open, and there is no isolation device from the bottom of the pusher to the leachate pool. During operation, the leachate remaining in the garbage flows into the leachate diversion hopper below the pusher, and a layer of combustible tar will form on the surface of the leachate diversion hopper. At the same time, the leachate itself will also produce hydrogen sulfide, methane, carbon monoxide and other toxic, harmful and flammable and explosive gases due to fermentation. Compared with the leachate diversion pipe and the leachate pool, the leachate collection pipe has a small space and the combustible gas is most concentrated. When the tar under the pusher is heated to the ignition point by the heat radiation in the incinerator, the tar will burn. If the flames produced by the combustion fall into the leachate collection pipe below, it may ignite the combustible gas and cause an explosion. Therefore, it is necessary to improve the guide and confluence structure under the pusher of the garbage incinerator in the prior art to solve the safety hazards existing in the prior art. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a leachate diversion and confluence structure which has a simple structure, is easy to use and can effectively avoid the occurrence of combustible gas explosions.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A leachate diversion and confluence structure comprises a diversion pipe, a U-shaped pipe and a collecting pipe which are connected in sequence. The diversion pipe is used to guide the leachate flowing out of the garbage hopper into the collecting pipe, the U-shaped pipe is used to isolate the air between the diversion pipe and the collecting pipe, and the collecting pipe is used to collect the leachate into a leachate pool.

[0006] The above-mentioned leachate diversion and convergence structure is preferably characterized in that: a first inspection port is provided at the bottom of the U-shaped tube.

[0007] The above-mentioned leachate diversion and confluence structure is preferably configured such that: a sediment hopper is also provided at the bottom of the U-shaped tube.

[0008] The above-mentioned leachate diversion and confluence structure is preferably configured such that: the sediment hopper is located directly below the outlet end of the diversion pipe, and the first inspection port is located on the pipe wall at the opening end of the sediment hopper.

[0009] The above-mentioned leachate diversion and confluence structure is preferably configured such that: the outlet end of the U-shaped pipe is connected to the collecting pipe through a horizontal pipe section, and a second inspection port is provided on the horizontal pipe section.

[0010] The above-mentioned leachate diversion and confluence structure is preferably configured such that: the outlet end of the U-shaped pipe is connected to the collecting pipe through a horizontal pipe section, and a second inspection port is provided on the horizontal pipe section.

[0011] The above-mentioned leachate diversion and confluence structure is preferably such that: the height of the outlet end of the U-shaped tube is ≥ 0.1 m.

[0012] The above-mentioned leachate diversion and confluence structure is preferably configured such that: the height of the outlet end of the U-shaped tube is 0.1 m.

[0013] The above-mentioned leachate diversion and confluence structure is preferably such that: the input end of the diversion pipe is connected to a diversion funnel.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] (1) The leachate diversion and confluence structure of the utility model sets a U-shaped tube structure between the diversion tube and the collection tube. The high-concentration combustible gas in the collection tube is completely isolated from the flames that may appear in the diversion tube through the water seal effect of the U-shaped tube, which can effectively avoid explosions. The water in the U-shaped tube does not need to be added additionally. The water seal is established by the leachate itself, and it does not affect the discharge of the leachate. That is, based on the U-shaped tube connection principle, the water column in the U-shaped tube is used to form static pressure, which offsets the negative pressure in the garbage incinerator to achieve a balance of force. Then, when leachate comes down from the upper part, the balance is broken to achieve the purpose of drainage. The design is ingenious, the structure is simple, the parts are easy to process and install, and it is easy to use.

[0016] (2) The leachate diversion and confluence structure of the utility model is provided with a first inspection port at the bottom of the U-shaped pipe and a second inspection port on the horizontal pipe section at the outlet end of the U-shaped pipe, so as to facilitate regular inspection of the pipeline and removal of sediment deposited at the bottom and outlet end of the U-shaped pipe during operation.

[0017] (3) The leachate diversion and confluence structure of the utility model is provided with a special sediment hopper on the bottom wall of the U-shaped tube, which can increase the slag capacity at the bottom of the U-shaped tube, extend the sediment cleaning cycle, reduce the slag removal frequency, and thus improve the equipment utilization rate. Because the sediment hopper has a certain capacity, before the sediment hopper is filled with sediment, the sediment will not occupy the space of the bottom pipe section of the U-shaped tube, and therefore will not have any impact on the circulation of the leachate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the leachate diversion and confluence structure in a specific embodiment of the utility model.

[0019] Legend: 1. Guide pipe; 2. U-shaped pipe; 3. Collecting pipe; 4. First inspection port; 5. Sediment hopper; 6. Horizontal pipe section; 7. Second inspection port; 8. Bottom pipe section. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] Figure 1 A specific embodiment of the leachate diversion and confluence structure of the utility model is shown, comprising a diversion pipe 1, a U-shaped pipe 2 and a collection pipe 3 connected in sequence, the diversion pipe 1 is used to guide the leachate flowing out of the garbage hopper into the collection pipe 3, the U-shaped pipe 2 is used to isolate the air between the diversion pipe 1 and the collection pipe 3, and the collection pipe 3 is used to collect the leachate into the leachate pool. The leachate diversion and confluence structure of this embodiment can establish a water seal structure through the U-shaped pipe 2 between the diversion pipe 1 and the collection pipe 3 of the leachate under normal operation, which is used to isolate the space below the pusher of the garbage incinerator from the collection pipe 3, thereby isolating the contact between the combustible gas and the flame to avoid explosion. The water used for the water seal comes from the leachate itself, does not need to be added additionally, and does not affect the discharge of the leachate.

[0022] During normal operation, the leachate flows along the wall of the flow guide pipe 1 to the U-shaped pipe 2, and the leachate accumulates continuously in the U-shaped pipe 2. When the liquid level of the leachate in the U-shaped pipe 2 is higher than the top wall of the bottom pipe section 8 of the U-shaped pipe 2, the two sides of the U-shaped pipe 2 are isolated by the liquid. When the liquid level at the outlet of the U-shaped pipe 2 is higher than the bottom wall of the horizontal pipe section 6, the leachate flows into the collection pipe 3 and then into the leachate pool. When the flame falls along the flow guide pipe 1, since the two sides of the U-shaped pipe 2 are isolated by the liquid, the combustible gas in the collection pipe 3 will not be ignited by the flame, achieving an explosion-proof effect.

[0023] In this embodiment, a first inspection port 4 is provided at the bottom of the U-shaped tube 2. During operation, sediment will be deposited at the bottom of the U-shaped tube 2, which will cause blockage over time and need to be cleared regularly. The first inspection port 4 is provided at the bottom of the U-shaped tube 2, which is very convenient for cleaning the sediment.

[0024] In this embodiment, a sediment hopper 5 is provided on the bottom wall of the U-shaped tube 2. Since the sediment hopper 5 has a certain capacity, the sediment will not occupy the space of the bottom pipe section 8 of the U-shaped tube 2 before the sediment hopper 5 is filled with sediment, and will not have any impact on the circulation of the leachate. Therefore, a dedicated sediment hopper 5 is provided on the bottom wall of the U-shaped tube 2, which can increase the sediment capacity at the bottom of the U-shaped tube 2 and extend the sediment cleaning cycle.

[0025] In this embodiment, the sediment hopper 5 is located directly below the outlet end of the guide pipe 1, which is easier to collect sediment. The first inspection port 4 is located on the pipe wall at the open end of the sediment hopper 5 and is opposite to the area where the sediment hopper 5 and the U-shaped pipe 2 intersect, making slag removal more convenient.

[0026] In this embodiment, the outlet end of the U-shaped tube 2 is connected to the collecting pipe 3 through a horizontal pipe section 6, and a second inspection port 7 is provided on the horizontal pipe section 6. Since the hydraulic force of the leachate passing through the horizontal pipe section 6 is relatively gentle, impurities will be deposited in the horizontal pipe section 6 during long-term operation, and regular cleaning is required. A second inspection port 7 is provided on the horizontal pipe section 6. During inspection and cleaning, it is only necessary to open the second inspection port 7 to remove the impurities deposited in the horizontal pipe section 6.

[0027] In this embodiment, the height of the outlet end of the U-shaped tube 2 is ≥0.1m, and the specific calculation process is as follows:

[0028] The height of both sides of the U-tube 2 is calculated. The pressure of the liquid surface on the left side of the U-tube 2 is related to the pressure in the incinerator. The pressure in the incinerator fluctuates between -1000Pa and +1000Pa during normal operation. The outlet of the U-tube 2 ( Figure 1 The liquid surface pressure is equal to the pressure of the leachate pool, i.e., atmospheric pressure. In order to ensure that the water seal does not fail during normal operation, the height of the U-tube 2 must ensure that the water seal does not fail in two extreme cases, because the inlet end of the U-tube 2 ( Figure 1 The pipe on the left in the middle is the diversion pipe 1 for the leachate, which is high enough, so we only need to calculate the height of the outlet end of the U-shaped pipe 2.

[0029] When the pressure in the incinerator is -1000Pa, the liquid level on the right side drops to the lowest level, and the liquid level on the left side rises. According to the principle of communicating vessels: the liquid pressures at the same height on the left and right sides are equal, and the height difference on both sides can be calculated by the following formula:

[0030]

[0031] Among them, ρ is the density of the leachate, 1000kg / m³; g is the acceleration of gravity, 9.8N / kg; P1 is the liquid surface pressure on the left side of the U-shaped tube 2, -1000Pa; P2 is the liquid surface pressure on the right side of the U-shaped tube, 0Pa;

[0032] It can be concluded that the height difference of the liquid level on both sides of the U-tube 2 is ∆h=0.1m;

[0033] The height of the right side of the U-tube 2 and the height difference of the liquid level obtained above have the following relationship:

[0034]

[0035] Wherein, d is the right diameter of U-shaped tube 2, 0.25m; D is the left diameter of U-shaped tube, 0.5m;

[0036] Therefore, the height of the right side of the U-shaped tube 2 should be h2=0.08m;

[0037] When the pressure in the incinerator is +1000Pa, the liquid level on the left side drops to the lowest level, and the liquid level on the right side is flush with the horizontal pipe section 6, so the liquid level remains unchanged. The height difference between the two sides is the height of the right side of the U-shaped tube 2, that is,

[0038]

[0039] Among them, ρ is the density of the leachate, 1000kg / m³; g is the acceleration of gravity, 9.8N / kg; P1 is the liquid surface pressure on the left side of the U-shaped tube 2, 1000Pa; P2 is the liquid surface pressure on the right side of the U-shaped tube 2, 0Pa;

[0040] Therefore, the height of the right side of the U-tube should be h2=0.1m;

[0041] Comparing the heights of the right side of the U-shaped tube 2, ie, the outlet end, in the two extreme cases, the larger one is selected, so the height of the right side of the U-shaped tube 2 is preferably 0.1 m.

[0042] In this embodiment, the input end of the guide pipe 1 is connected to a guide funnel, which can better receive the leachate.

[0043] Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A leachate diversion and confluence structure, characterized in that: The invention comprises a guide pipe (1), a U-shaped pipe (2) and a collecting pipe (3) which are connected in sequence, wherein the guide pipe (1) is used to guide the leachate flowing out of the garbage hopper into the collecting pipe (3), the U-shaped pipe (2) is used to isolate the air between the guide pipe (1) and the collecting pipe (3), and the collecting pipe (3) is used to collect the leachate into a leachate pool.

2. The leachate diversion and confluence structure according to claim 1, characterized in that: The bottom of the U-shaped tube (2) is provided with a first inspection opening (4).

3. The leachate diversion and confluence structure according to claim 2, characterized in that: A sediment hopper (5) is also provided at the bottom of the U-shaped tube (2).

4. The leachate diversion and confluence structure according to claim 3, characterized in that: The sediment hopper (5) is located directly below the outlet end of the flow guide pipe (1), and the first inspection port (4) is located on the pipe wall at the opening end of the sediment hopper (5).

5. The leachate diversion and confluence structure according to claim 1, characterized in that: The outlet end of the U-shaped pipe (2) is connected to the collecting pipe (3) via a horizontal pipe section (6), and a second inspection port (7) is provided on the horizontal pipe section (6).

6. The leachate diversion and confluence structure according to claim 4, characterized in that: The outlet end of the U-shaped pipe (2) is connected to the collecting pipe (3) via a horizontal pipe section (6), and a second inspection port (7) is provided on the horizontal pipe section (6).

7. The leachate diversion and confluence structure according to any one of claims 1 to 6, characterized in that: The height of the outlet end of the U-shaped tube (2) is ≥ 0.1 m.

8. The leachate diversion and confluence structure according to claim 7, characterized in that: The height of the outlet end of the U-shaped tube (2) is 0.1 m.

9. The leachate diversion and confluence structure according to any one of claims 1 to 6, characterized in that: The input end of the flow guide pipe (1) is connected to a flow guide hopper.

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