Waste heat boiler blow-off water tank

Abstract

A waste heat boiler blow-off water tank comprises a rectangular frame, a bottom plate is arranged on the lower portion of the frame, a plurality of side plates are evenly installed on the side faces of the periphery of the frame, a top plate is arranged on the top of the frame, and a tank body used for containing sewage is defined by the frame, the bottom plate, the side plates and the top plate. A water inlet assembly is arranged on the frame, and a drain outlet is formed in the lower end of the bottom plate; the two water inlet pipes with different lengths are arranged, on one hand, water inlet impact can be prevented, and on the other hand, after the sewage surface rises, the short pipe is used for water inlet, and the problem that water inlet is slow or difficult due to too high water pressure can be solved.

Description

Technical Field

[0001] This utility model relates to the field of thermal technology, and more specifically to a wastewater discharge tank for a waste heat boiler. Background Technology

[0002] A steam boiler is a common heat exchange device and a special type of pressure vessel used to produce saturated steam or superheated steam. Its main heating medium is water, and various heat sources or waste heat resources can be used as the heating medium. Waste heat boilers are widely used in the recovery of waste heat from low-temperature flue gas and low-temperature water sources at the kiln tail in industries such as metallurgy, coking, and furnaces.

[0003] In the production and application of waste heat boilers, to ensure the normal operation of the boiler, the boiler water with a high salt concentration on the surface of the steam-water separator inside the boiler drum (or steam drum) must be drained. This is called boiler drum surface blowdown. In addition, during operation, the evaporator of the waste heat boiler forms insoluble sludge at the bottom of the furnace, which needs to be drained at regular intervals. Therefore, boilers are generally designed with a corresponding blowdown rate of 2%-10% depending on the pressure and operating conditions. Whether it is continuous blowdown of the boiler drum surface or periodic blowdown of the furnace bottom, the boiler water with high temperature and pressure generated must meet the conditions of cooling and depressurization when discharged.

[0004] Waste heat boilers typically produce medium- and low-pressure steam in relatively small quantities. They occupy a subordinate position in the main process flow of industries such as metallurgy, coking, and kilns, and are generally designed and constructed as auxiliary processes. Therefore, they are usually equipped with separate control and water treatment systems. A water treatment and feedwater workshop needs to be built near the waste heat boiler, with a separate intermediate wastewater tank. Currently, wastewater tanks typically have water entering from the top and exiting from the bottom. During operation, the incoming water impacts the bottom plate of the wastewater tank, which may damage the bottom plate over time. Utility Model Content

[0005] One advantage of this invention is that it provides a waste heat boiler wastewater tank with two inlet pipes of different lengths. On the one hand, this can prevent water inrush, and on the other hand, after the wastewater level rises, switching to the shorter pipe for water inflow can prevent the problem of slow or difficult water inflow due to excessive water pressure.

[0006] To achieve at least one of the above advantages of this utility model, this utility model provides a waste heat boiler wastewater tank, including a rectangular frame, a bottom plate at the bottom of the frame, several side plates evenly installed on the four sides of the frame, and a top plate at the top of the frame. The frame, bottom plate, side plates and top plate form a tank for containing wastewater; a water inlet assembly is provided on the frame, and a drain outlet is provided at the lower end of the bottom plate.

[0007] According to one embodiment of the present invention, the water inlet assembly includes a main pipe, the lower end of which is connected to a long pipe and a short pipe, the upper ends of which are respectively connected to a first valve and a second valve, the long pipe extending to the top of the bottom plate and the short pipe extending to the bottom of the top plate.

[0008] According to one embodiment of the present invention, a vent hole communicating with the box body is installed on the top plate.

[0009] According to one embodiment of the present invention, a manhole communicating with the box body is provided on the top plate, and a manhole cover is hinged to the manhole.

[0010] According to one embodiment of the present invention, an inner ladder is provided inside the box near the manhole, and an outer ladder is provided outside the box near the manhole.

[0011] According to one embodiment of the present invention, a plurality of support rods are also provided inside the box, and the upper end of the support rods is provided with a top support and connected to the frame through the top support.

[0012] According to one embodiment of the present invention, a plurality of pull rods are arranged in the horizontal direction inside the box, and both ends of the pull rods are connected to the frame.

[0013] According to one embodiment of the present invention, a level gauge for measuring the water level inside the tank is provided inside the tank.

[0014] According to one embodiment of the present invention, an overflow port is provided on the upper side of the top side plate.

[0015] According to one embodiment of the present invention, a base is provided at the bottom of the frame, and several legs are provided at the lower end of the base. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] In the attached diagram: 1. Support leg, 2. Base, 3. Frame, 5. Side plate, 6. Vent hole, 7. Overflow port, 8. Long pipe, 9. First valve, 10. Main pipe, 11. Second valve, 12. Short pipe, 13. Level gauge, 14. Top support, 15. Manhole cover, 16. Inner ladder, 17. Pull rod, 18. Outer ladder, 19. Drain outlet. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description will be provided in conjunction with the appendix of this utility model. Figure 1 The present invention will be described in more detail below.

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0020] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0021] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0022] This utility model provides a waste heat boiler wastewater tank, including a rectangular frame 3, a bottom plate at the bottom of the frame 3, several side plates 5 evenly installed on the four sides of the frame 3, and a top plate at the top of the frame 3. The frame 3, bottom plate, side plates 5, and top plate form a tank for containing wastewater. A water inlet assembly is provided on the frame 3, and a drain outlet 19 is provided at the lower end of the bottom plate. The water inlet assembly includes a main pipe 10, the lower end of which is connected to a long pipe 8 and a short pipe 12. The upper ends of the long pipe and the short pipe 12 are respectively connected to a first valve 9 and a second valve 11. The long pipe 8 extends to the top of the bottom plate, and the short pipe 12 extends to the bottom of the top plate. A vent 6 is installed that communicates with the box body; a manhole communicating with the box body is provided on the top plate, and a manhole cover 15 is hinged to the manhole; an inner ladder 16 is provided inside the box near the manhole, and an outer ladder 18 is provided outside the box near the manhole; several support rods are also provided inside the box, and the upper end of the support rods is provided with a top support 14 and connected to the frame 3 through the top support 14; several pull rods 17 are provided in the horizontal direction inside the box, and both ends of the pull rods 17 are connected to the frame 3; a level gauge 13 for measuring the water level inside the box is provided inside the box; an overflow port 7 is provided on the upper side of the side plate 5 located at the top; a base 2 is provided at the bottom of the frame 3, and several support legs 1 are provided at the lower end of the base 2.

[0023] The first embodiment of this utility model is as follows:

[0024] A waste heat boiler wastewater tank includes a rectangular frame 3, a bottom plate at the bottom of the frame 3, several side plates evenly installed on the four sides of the frame 3, and a top plate at the top of the frame 3. The frame 3, bottom plate, side plates 5 and top plate form a tank for containing wastewater. A water inlet component is provided on the frame 3 to inject wastewater into the tank. A drain outlet 19 is provided at the bottom end of the bottom plate to discharge wastewater.

[0025] The top plate is equipped with a vent 6 that communicates with the box body. When sewage is discharged, the internal air pressure increases and the internal air is discharged through the vent 6. The top plate is equipped with a manhole that communicates with the box body. A manhole cover 15 is hinged to the manhole. An internal ladder 16 is installed inside the box near the manhole, and an external ladder 18 is installed outside the box near the manhole, which facilitates workers to climb in and out for internal and external maintenance.

[0026] The box is also equipped with several support rods. The upper end of the support rods is equipped with a top support 14 and is connected to the frame 3 through the top support 14. The support rods strengthen the internal structure. Several tie rods 17 are arranged horizontally inside the box. Both ends of the tie rods 17 are connected to the frame 3 to hold the side of the frame 3 and prevent the side plate 5 from being damaged by pressure due to internal sewage pressure. Sealing gaskets are set between the frame 3 and the bottom plate, and between the side plate 5 and the top plate to prevent sewage leakage.

[0027] The tank is equipped with a level gauge 13 for measuring the water level inside the tank.

[0028] An overflow port 7 is provided on the upper side of the top side panel 5. When too much sewage is injected, the sewage will be discharged from the overflow port 7 to prevent the tank from being damaged due to excessive pressure caused by too much sewage.

[0029] The bottom of the frame 3 is provided with a base 2, and the lower end of the base 2 is provided with several legs 1 to support the box and facilitate the discharge of sewage.

[0030] The water inlet assembly includes a main pipe 10, with a long pipe 8 and a short pipe 12 connected to the lower end of the main pipe 10. The upper ends of the long pipe and the short pipe 12 are respectively connected to a first valve 9 and a second valve 11. The long pipe 8 extends to the top of the bottom plate, and the short pipe 12 extends to the bottom of the top plate. A controller is also provided, which is electrically connected to the first valve 9, the second valve 11, and the level gauge 13. When the water level in the tank is low, the second valve 11 is closed and the first valve 9 is opened, and the sewage is discharged into the tank from the long pipe 8. At this time, the sewage impact is very small. As the water level rises, the water pressure resistance at the outlet of the long pipe 8 increases, and the water discharge becomes difficult. At this time, the second valve 11 is opened and the first valve 9 is closed, and the sewage is discharged into the tank from the short pipe 12.

[0031] It should be noted that the terms "first, second, and third" used in this utility model are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0032] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the principles, the implementation of the present invention may have any modifications or variations.

Claims

1. A wastewater discharge tank for a waste heat boiler, characterized in that: The system includes a rectangular frame, a bottom plate at the bottom of the frame, several side plates evenly installed on the four sides of the frame, and a top plate at the top of the frame. The frame, bottom plate, side plates, and top plate together form a tank for containing wastewater. A water inlet assembly is installed on the frame, and a drain outlet is located at the bottom of the bottom plate. The water inlet assembly includes a main pipe, with a long pipe and a short pipe connected to its lower end. A first valve and a second valve are respectively connected to the upper ends of the long and short pipes. The long pipe extends above the bottom plate, and the short pipe extends below the top plate. A controller is also provided, electrically connected to the first valve, the second valve, and a level gauge. When the water level in the tank is low, the second valve is closed and the first valve is opened, allowing wastewater to drain into the tank through the long pipe. At this time, the wastewater impact is minimal. As the water level rises, the water pressure resistance at the outlet of the long pipe increases, making drainage difficult. At this point, the second valve is opened and the first valve is closed, allowing wastewater to drain into the tank through the short pipe.

2. The waste heat boiler wastewater tank according to claim 1, characterized in that: The top plate is equipped with ventilation holes that communicate with the box body.

3. The waste heat boiler wastewater tank according to claim 1, characterized in that: The top plate is provided with a manhole that communicates with the box body, and a manhole cover is hinged to the manhole.

4. The waste heat boiler wastewater tank according to claim 1, characterized in that: An internal ladder is provided inside the box near the manhole, and an external ladder is provided outside the box near the manhole.

5. The waste heat boiler wastewater tank according to claim 1, characterized in that: The box is also equipped with several support rods, and the upper end of the support rods is provided with a top support and connected to the frame through the top support.

6. The waste heat boiler wastewater tank according to claim 1, characterized in that: Several pull rods are arranged horizontally inside the box, and both ends of the pull rods are connected to the frame.

7. The waste heat boiler wastewater tank according to claim 1, characterized in that: The tank is equipped with a level gauge for measuring the water level inside the tank.

8. The waste heat boiler wastewater tank according to claim 1, characterized in that: An overflow outlet is provided on the upper side of the top side panel.

9. The waste heat boiler wastewater tank according to claim 1, characterized in that: A base is provided at the bottom of the frame, and several feet are provided at the lower end of the base.

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