Black water decompression tank

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a black water pressure reduction tank, which comprises a tank body, a water inlet arranged at the top end of the tank body and a water outlet pipe arranged on one side of the tank body, and is characterized by comprising a bottom plate detachably connected to the bottom of the tank body and a pressure reduction structure arranged on the bottom plate, a wear-resisting plate is arranged on the upper surface of the bottom plate; in practical application, black water is fed into the tank body through the water inlet, the black water is decompressed through the decompression structure, and the decompressed black water is discharged through the water outlet pipe; bottom plate abrasion caused by direct impact of black water on the bottom plate is avoided through the pressure reduction structure, so that the bottom plate does not need to be dismounted and replaced frequently, and the working stability of the gasifier system is better; the pressure reducing effect of the black water can be improved, the buffer tank does not need to be frequently detached to replace the bottom plate, and the working stability of a gasification furnace system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a black water pressure reducing tank. Background Art

[0002] The blackwater treatment system is responsible for performing three-stage flash evaporation on the blackwater discharged from the gasification system. After cooling and recovering heat, the blackwater enters the clarifier for sedimentation. The clarified blackwater is then deoxygenated and returned to the system for reuse. The concentrated slurry is then sent to the vacuum filtration system for dehydration, and the filter cake is removed from the delimited area. The blackwater discharged from the gasification system reaches a temperature of 252°C, a pressure of 6.0 MPa, and a slag content of 10%. After being reduced to 0.8 MPa by a pressure reducing valve, the buffer tank suffers from severe wear and erosion. Because the buffer tank is only about 1 meter tall and its bottom and side walls are unreinforced, the buffer tank suffers from severe wear and erosion. The buffer tank's service life is only a dozen days before it becomes perforated and leaks. Furthermore, because the buffer tank is connected to the entire gasifier system, it cannot be removed for maintenance. Therefore, the existing Chinese patent application number CN206219255U discloses a buffer tank and a blackwater treatment device incorporating the same. The buffer tank includes a tank body and a water inlet and a water outlet provided on the tank body. The tank body comprises: a plurality of tank body segments, which are sequentially connected; a first connecting member is provided on at least one end face of each tank body segment, and two adjacent tank body segments are sealed together via the first connecting member. The buffer tank includes a tank body and a water inlet and a water outlet provided on the tank body. The tank body comprises: a plurality of tank body segments, which are sequentially connected; a first connecting member is provided on at least one end face of each tank body segment, and two adjacent tank body segments are sealed together via the first connecting member.

[0003] However, in actual applications, the above-mentioned buffer tank still has the following shortcomings: the buffer decompression method of reducing the pressure of black water by only changing the flow direction of black water has a poor decompression effect, and since there are many hard impurities in the black water, the bottom plate is facing the fluid inlet. During long-term use, the bottom plate is easily worn due to the impact of black water. It is still necessary to frequently remove the buffer tank and replace the bottom plate, which reduces the working stability of the gasification furnace system. Utility Model Content

[0004] The purpose of the present invention is to address the above-mentioned deficiencies and provide a black water pressure reducing tank, which can not only increase the pressure reducing effect of black water, but also eliminate the need to frequently remove the buffer tank to replace the bottom plate, thereby ensuring the working stability of the gasification furnace system.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A black water pressure reducing tank comprises a tank body, a water inlet arranged at the top of the tank body, and a water outlet pipe arranged at one side of the tank body. The tank body is characterized in that: a bottom plate is detachably connected to the bottom of the tank body, a pressure reducing structure is installed on the bottom plate, and a wear-resistant plate is provided on the upper surface of the bottom plate.

[0007] Furthermore, a decompression chamber is provided inside the tank body; the decompression structure includes a rotating shaft rotatably connected to the decompression chamber, a plurality of rotating blades arranged on the rotating shaft, and a plurality of flow channels are formed between adjacent rotating blades and the inner wall of the decompression chamber. The water inlet end of the water outlet pipe is provided on one side of the rotating blade, and the bottom end of the rotating shaft is rotatably connected to the bottom plate.

[0008] Furthermore, the upper portion of the rotating blade is an inclined curved portion, the lower portion of the rotating blade is a vertical portion, and the inclined curved portion is arranged facing the water inlet.

[0009] Furthermore, the rotating blades and the rotating shaft are both made of high nickel alloy.

[0010] Furthermore, a nickel alloy plating layer is provided on the inner side wall of the decompression chamber.

[0011] Furthermore, the wear-resistant plate is a nickel alloy plate, and the thickness of the nickel alloy plate ranges from 8 to 10 mm.

[0012] Furthermore, the water inlet is provided with a water inlet flange, the end of the water outlet pipe is provided with a water outlet flange, and the bottom of the tank body is provided with a maintenance flange.

[0013] The beneficial effects of the utility model are:

[0014] In actual application, black water is introduced into the tank body through the water inlet, the black water is decompressed by the decompression structure, and the decompressed black water is discharged through the water outlet pipe; the decompression structure prevents the wear of the bottom plate caused by the black water directly impacting the bottom plate, so that the bottom plate does not need to be frequently removed and replaced, and the working stability of the gasification furnace system is better; the utility model can not only increase the decompression effect of black water, but also eliminates the need to frequently remove the buffer tank to replace the bottom plate, thereby ensuring the working stability of the gasification furnace system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a structural diagram of the decompression structure in the utility model;

[0017] Reference numerals: tank body 1 ; water inlet 11 ; water outlet pipe 12 ; decompression chamber 13 ; bottom plate 2 ; wear-resistant plate 3 ; rotating shaft 41 ; rotating blade 42 ; inclined curved portion 421 ; vertical portion 422 . DETAILED DESCRIPTION

[0018] like Figure 1 and Figure 2 As shown, a black water pressure reducing tank comprises a tank body 1, a water inlet 11 arranged at the top of the tank body 1, and a water outlet pipe 12 arranged on one side of the tank body 1, characterized in that: a bottom plate 2 detachably connected to the bottom of the tank body 1, a pressure reducing structure installed on the bottom plate 2, and a wear-resistant plate 3 is provided on the upper surface of the bottom plate 2.

[0019] During use, black water is introduced into the tank body 1 through the water inlet 11, the black water is decompressed by the decompression structure, and the decompressed black water is discharged through the water outlet pipe 12; the decompression structure prevents the black water from directly impacting the bottom plate 2 and causing wear on the bottom plate 2, so that the bottom plate 2 does not need to be frequently removed and replaced, and the working stability of the gasification furnace system is better; the utility model can not only increase the decompression effect of black water, but also eliminates the need to frequently remove the buffer tank to replace the bottom plate 2, thereby ensuring the working stability of the gasification furnace system.

[0020] like Figure 1 and Figure 2 As shown, a decompression chamber 13 is provided inside the tank body 1; the decompression structure includes a rotating shaft 41 rotatably connected to the decompression chamber 13, a plurality of rotating blades 42 arranged on the rotating shaft 41, and a plurality of flow channels are formed between adjacent rotating blades 42 and the inner wall of the decompression chamber 13. The water inlet end of the water outlet pipe 12 is provided on one side of the rotating blade 42, and the bottom end of the rotating shaft 41 is rotatably connected to the bottom plate 2; in this embodiment, the black water entering the tank body 1 from the water inlet 11 pushes the rotating blade 42 to drive the rotating shaft 41 to rotate, and the kinetic potential energy in the black water is partially consumed, the decompression effect is better, and the black water is discharged from the water outlet pipe 12 through the flow channel.

[0021] like Figure 1 and Figure 2 As shown, the upper part of the rotating blade 42 is an inclined curved portion 421, and the lower part of the rotating blade 42 is a vertical portion 422. The inclined curved portion 421 is arranged opposite the water inlet 11; in this embodiment, the black water entering the tank body 1 from the water inlet 11 impacts the inclined curved portion 421, pushing the rotating blade 42 to drive the rotating shaft 41 to rotate, and the black water enters between adjacent vertical portions 422 along the flow channel, and then enters the water outlet pipe 12.

[0022] like Figure 1 and Figure 2 As shown, the rotating blades 42 and the rotating shaft 41 are both made of high nickel alloy. In this embodiment, the rotating blades 42 and the rotating shaft 41 made of high nickel alloy have good wear resistance.

[0023] like Figure 1 and Figure 2As shown, a nickel alloy coating is provided on the inner side wall of the decompression chamber 13 . In this embodiment, the nickel alloy coating makes the inner side wall of the decompression chamber 13 have good wear resistance.

[0024] like Figure 1 and Figure 2 As shown, the wear-resistant plate 3 is a nickel alloy plate, and the thickness of the nickel alloy plate ranges from 8 to 10 mm. In this embodiment, the nickel alloy plate enables the bottom plate 2 to have good wear resistance and impact resistance, thereby extending the service life of the bottom plate 2.

[0025] like Figure 1 and Figure 2 As shown, the water inlet 11 is provided with a water inlet flange, the end of the water outlet pipe 12 is provided with a water outlet flange, and the bottom of the tank body 1 is provided with a maintenance flange; in this embodiment, the black water pressure reducing tank can be connected to the gasification furnace system through the water inlet flange and the water outlet flange, and the bottom plate 2 can be removed for maintenance through the maintenance flange.

[0026] The specific embodiments described herein are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them with similar methods without departing from the scope of the present invention.

Claims

1. A black water decompression tank, comprising a tank body (1), a water inlet (11) arranged at the top of the tank body (1), and a water outlet pipe (12) arranged at one side of the tank body (1), characterized in that: A bottom plate (2) is detachably connected to the bottom of the tank body (1), a decompression structure is installed on the bottom plate (2), and a wear-resistant plate (3) is provided on the upper surface of the bottom plate (2).

2. The black water decompression tank according to claim 1, characterized in that: A decompression chamber (13) is provided inside the tank body (1); the decompression structure comprises a rotating shaft (41) rotatably connected to the decompression chamber (13), a plurality of rotating blades (42) arranged on the rotating shaft (41), a plurality of flow channels formed between adjacent rotating blades (42) and the inner wall of the decompression chamber (13), the water inlet end of the water outlet pipe (12) is provided on one side of the rotating blades (42), and the bottom end of the rotating shaft (41) is rotatably connected to the bottom plate (2).

3. The black water decompression tank according to claim 2, characterized in that: The upper portion of the rotating blade (42) is an inclined curved portion (421), the lower portion of the rotating blade (42) is a vertical portion (422), and the inclined curved portion (421) is arranged facing the water inlet (11).

4. The black water decompression tank according to claim 2, characterized in that: The rotating blades (42) and the rotating shaft (41) are both made of high nickel alloy.

5. The black water decompression tank according to claim 2, characterized in that: A nickel alloy plating layer is provided on the inner side wall of the decompression chamber (13).

6. The black water decompression tank according to claim 1, characterized in that: The wear-resistant plate (3) is a nickel alloy plate, and the thickness of the nickel alloy plate ranges from 8 to 10 mm.

7. The black water decompression tank according to claim 1, characterized in that: The water inlet (11) is provided with a water inlet flange, the end of the water outlet pipe (12) is provided with a water outlet flange, and the bottom of the tank body (1) is provided with a maintenance flange.

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