A fully automatic backwashing device for a coal gasification black water heat extraction device
By installing a fully automatic backwashing device on the coal gasification black water heat extraction unit, and using electric valves and PLC control to achieve backwashing, the problem of black water clogging and scaling is solved, ensuring stable equipment operation and cleaning efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG GUOCHEN NEW ENERGY ENGINEERING CO LTD
- Filing Date
- 2025-07-01
- Publication Date
- 2026-06-30
AI Technical Summary
Coal gasification black water is prone to causing sludge and scale buildup in the heat extraction device, and cleaning and maintenance consume manpower and resources and affect normal use.
The design incorporates a fully automatic backwashing device. By installing an electric valve and a PLC control cabinet on the coal gasification black water heat extraction device, backwashing is achieved through reverse operation to remove accumulated ash and scale, and reduce clogging.
This ensures stable equipment operation, reduces cleaning costs and time, guarantees normal customer use, and extends equipment lifespan.
Smart Images
Figure CN224435176U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of coal gasification black water heat extraction technology, for example, to a fully automatic backwashing device for a coal gasification black water heat extraction device. Background Technology
[0002] Black water waste heat is extracted through a coal gasification black water heat extraction device. The coal gasification black water heat extraction device adopts a wide flow channel welded or detachable plate heat exchanger. Black water waste heat can be used for various purposes such as heating, saturated steam production, and chilled water production.
[0003] However, black water contains a large amount of gasification ash and slag, and its water quality is extremely poor. The content of solid particles can reach 1%-4% at most, and its hardness is high. Black water only flows in the forward direction in the coal gasification black water heat exchange device, which can easily cause sludge and scale buildup inside the device. Cleaning and maintenance are very labor-intensive, material-intensive, and time-consuming. Sometimes, the equipment is even shut down for a long time for cleaning and maintenance, which delays the normal use of the equipment by customers. Utility Model Content
[0004] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.
[0005] To address the aforementioned technical issues, this application provides a fully automatic backwashing device for a coal gasification black water heat extraction device. This fully automatic backwashing device can perform reverse backwashing on the coal gasification black water heat extraction device, reducing scaling and blockage of black water inside the heat extractor, ensuring stable equipment operation, low cleaning costs, and saving time, effort, and labor. The cleaning and maintenance period is also shorter, ensuring normal use for customers.
[0006] This application provides a fully automatic backwashing device for a coal gasification black water heat extraction device, including a black water inlet, which is connected to a main water inlet pipe. The left and right ends of the main water inlet pipe are respectively connected to a left T-junction and a right T-junction. One end of the left T-junction is connected to the water inlet of the coal gasification black water heat extraction device, and the other end of the left T-junction is connected to a main water outlet pipe, which is connected to a black water outlet. One end of the right T-junction is connected to the water outlet of the coal gasification black water heat extraction device, and the other end of the right T-junction is connected to the main water outlet pipe.
[0007] In a further improvement of this utility model, the black water inlet is connected to an inlet branch pipe, which is connected to the main inlet pipe; the main outlet pipe is connected to an outlet branch pipe, which is connected to the black water outlet.
[0008] In a further improvement of this utility model, an electric valve I is provided between the water inlet branch pipe and the left tee; the other end of the left tee is connected to a left water outlet pipe, the left water outlet pipe is connected to an electric valve IV, and the electric valve IV is connected to the main water outlet pipe.
[0009] In a further improvement of this utility model, an electric valve II is provided between the water inlet branch pipe and the right tee; the other end of the right tee is connected to the right water outlet pipe, the right water outlet pipe is connected to the electric valve III, and the electric valve III is connected to the main water outlet pipe.
[0010] In a further improvement of this utility model, electric valve I, electric valve II, electric valve III, and electric valve IV are all electric wear-resistant hemispherical valves.
[0011] In a further improvement of this utility model, a PLC control cabinet is also included, which is electrically connected to electric valve I, electric valve II, electric valve III, and electric valve IV respectively.
[0012] Compared with the prior art, this application has the following beneficial effects:
[0013] This application enables reverse backwashing of coal gasification black water heat exchange devices, reducing scaling and blockage of black water inside the heat exchanger, ensuring stable equipment operation, low cleaning costs, and saving time, effort, and labor. The cleaning and maintenance period is also shorter, ensuring normal use for customers.
[0014] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description
[0015] To more clearly illustrate the background technology or the technical solution of this application, the accompanying drawings used in conjunction with the prior art or specific embodiments are briefly introduced below. Obviously, the structures, proportions, sizes, etc. shown in the drawings are only used to complement the content disclosed in the specification, so that those skilled in the art can understand and read them, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modification to the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in this application, provided that it does not affect the effects and purposes that this application can produce.
[0016] Figure 1 This is a structural diagram illustrating a specific embodiment of this application.
[0017] Figure 2 This is a schematic diagram showing the installation position of the coal gasification black water heat extraction device according to a specific embodiment of this application.
[0018] The diagram shows: 1. Main inlet pipe; 2. Left tee; 3. Right tee; 4. Main outlet pipe; 5. Inlet branch pipe; 6. Outlet branch pipe; 7. Electric valve I; 8. Left outlet pipe; 9. Electric valve IV; 10. Electric valve II; 11. Right outlet pipe; 12. Electric valve III; 13. PLC control cabinet; 100. Coal gasification black water heat extraction device; 200. This fully automatic backwashing device; S1. Black water inlet; S2. Black water outlet; S3. Inlet of coal gasification black water heat extraction device; S4. Outlet of coal gasification black water heat extraction device. Detailed Implementation
[0019] To gain a more detailed understanding of the features and technical content of the embodiments of this application, the implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference only and are not intended to limit the embodiments of this application. In the following technical description, for ease of explanation, multiple details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in order to simplify the drawings.
[0020] The terms “first”, “second”, etc., used in the embodiments of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; it should be understood that such data used can be interchanged where appropriate so as to be the embodiments of the present application described herein; furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion.
[0021] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing the embodiments of this application and their implementations, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, in addition to indicating orientation or positional relationship, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in the embodiments of this application can be understood according to the specific circumstances.
[0022] In addition, the terms “set up,” “connect,” and “fix” should be interpreted broadly. For example, “connection” can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0023] Unless otherwise stated, the term "multiple" means two or more.
[0024] In this embodiment of the application, the character " / " indicates that the objects before and after are in an "or" relationship. For example, Z / X means: Z or X. The term "and / or" describes the relationship between objects, indicating that there can be three relationships. For example, Z and / or X means: Z or X, or Z and X.
[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of this application can be combined with each other.
[0026] Black water contains a large amount of gasification ash and slag, and its water quality is extremely poor. The content of solid particles can reach 1%-4% at most. It has high hardness. Black water only flows in the forward direction in the coal gasification black water heat exchange device, which can easily cause sludge and scale buildup inside the device. Cleaning and maintenance are very labor-intensive, material-intensive, and time-consuming. Sometimes, the equipment is even shut down for a long time for cleaning and maintenance, which delays the normal use of the equipment by customers.
[0027] Therefore, the design concept of this application is to adopt the backwashing design concept. After adding a fully automatic backwashing device to the coal gasification black water heat exchange device, the black water can be automatically backwashed inside the device. The backwashing, which runs in reverse, removes the ash, scale and deposits in the heat exchange device, reduces the scaling and blockage of black water inside the heat exchanger, maintains the heat exchange efficiency of the equipment, ensures the long-term stable operation of the system, extends the service life of the equipment, has low cleaning cost, and is more convenient, labor-saving and time-saving. The cleaning and maintenance period is shorter, the maintenance frequency is reduced, and the normal use of the customer is guaranteed.
[0028] like Figure 1-2 As shown, this application provides a fully automatic backwashing device for a coal gasification black water heat extraction device, installed on the coal gasification black water heat extraction device 100. It includes a black water inlet S1, which is connected to a main water inlet 1. The left and right ends of the main water inlet 1 are respectively connected to a left T-junction 2 and a right T-junction 3. One end of the left T-junction 2 is connected to the inlet S3 of the coal gasification black water heat extraction device 100, and the other end of the left T-junction 2 is connected to a main water outlet 4. The main water outlet 4 is connected to a black water outlet S2. One end of the right T-junction 3 is connected to the outlet S4 of the coal gasification black water heat extraction device 100, and the other end of the right T-junction 3 is connected to the main water outlet 4.
[0029] Pressure gauge I can be installed between one end of the left tee 2 and the inlet S3 of the coal gasification black water heat extraction device 100, and pressure gauge II can be installed between one end of the right tee 3 and the outlet S4 of the coal gasification black water heat extraction device 100, for detecting water pressure.
[0030] The black water inlet S1 is connected to an inlet branch pipe 5, which is connected to the main inlet pipe 1; the main outlet pipe 4 is connected to an outlet branch pipe 6, which is connected to the black water outlet S1.
[0031] It is understandable that by using the inlet branch pipe 5 and the outlet branch pipe 6, it is easier to connect the black water inlet S1 to the main inlet pipe 1 and the outlet branch pipe 6 to the black water outlet S1.
[0032] An electric valve I7 is installed between the inlet branch pipe 5 and the left tee 2; the other end of the left tee 2 is connected to the left outlet pipe 8, the left outlet pipe 8 is connected to the electric valve IV9, and the electric valve IV9 is connected to the outlet main pipe 4.
[0033] It is understandable that electric valve I7 is used to switch the inlet branch pipe 5 and the left tee 2 on and off, and electric valve IV9 is used to switch the left tee 2 and the outlet main pipe 4 on and off.
[0034] An electric valve II 10 is installed between the water inlet branch pipe 5 and the right tee 3; the other end of the right tee 3 is connected to the right water outlet pipe 11, the right water outlet pipe 11 is connected to the electric valve III 12, and the electric valve III 12 is connected to the main water outlet pipe 4.
[0035] It is understandable that electric valve II10 is used to switch the inlet branch pipe 5 and the right tee 3 on and off, and electric valve III12 is used to switch the right tee 3 and the outlet main pipe 4 on and off.
[0036] Among them, electric valve I7, electric valve II10, electric valve III12, and electric valve IV9 are all electric wear-resistant hemispherical valves.
[0037] Understandably, directly using existing finished electric wear-resistant hemispherical valves would facilitate the rapid implementation of the solution.
[0038] It also includes a PLC control cabinet 13, which is electrically connected to electric valve I7, electric valve II10, electric valve III12, and electric valve IV9 respectively.
[0039] Understandably, PLC control cabinet 13 can control the switching of electric valve I7, electric valve II10, electric valve III12, and electric valve IV9, which facilitates automated operation.
[0040] This application makes the following innovations to the coal gasification black water heat extraction device 100:
[0041] Four electric wear-resistant hemispherical valves (electric valve I7, electric valve II10, electric valve III12, and electric valve IV9) are installed at the inlet and outlet of the black water heat extraction device. Through the automatic switching of the flushing process in the PLC control cabinet 13, reverse backflushing is achieved to ensure that the device does not clog during long-term operation.
[0042] PLC control cabinet 13 is a fully automatic control cabinet, with a PLC or DCS automatic control system that can realize timed automatic flushing.
[0043] Through the above improvements, this application achieves the following effects:
[0044] The addition of a fully automatic backwashing device reduces scale and blockage of black water inside the heat exchanger, ensuring long-term operation, maintaining stable system operation, reducing unplanned shutdowns, and lowering manual cleaning costs and safety hazards.
[0045] The electric wear-resistant hemispherical valve of the backwashing device can also serve as an on / off switch, enabling maintenance and shutdown, and achieving intelligent management of the black water treatment system.
[0046] The heat exchange process of this application is as follows: Black water enters the coal gasification black water heat exchange device 100 through the black water inlet S1. Electric valve I7 and electric valve III12 are opened, while electric valve II10 and electric valve IV9 are closed. The black water enters the inlet S3 of the coal gasification black water heat exchange device 100 through electric valve I7. When the system is running normally, the black water enters the coal gasification black water heat exchange device 100 and exchanges heat with the cold side medium. After heat exchange, the black water flows out through the outlet S4, electric valve III12, and black water outlet S2 to realize black water side discharge and enter the next stage system.
[0047] The backwashing process of this application is as follows: When the system reaches the pre-designed time, the PLC control cabinet 1 sends a signal to close electric valve I7 and electric valve III12, while simultaneously opening electric valve II10 and electric valve IV9. Black water enters the coal gasification black water heat exchanger 100 from the outlet S4 and begins to flow in reverse for backwashing. The backwashed black water flows out through the inlet S3, electric valve IV9, and black water outlet S2, thus realizing the backwashing of the black water inside the heat exchanger.
[0048] The foregoing description and accompanying drawings fully illustrate embodiments of this application to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operation may vary. Some parts and features of some embodiments may be included or replace parts and features of other embodiments. The embodiments of this application are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from their scope. The scope of this application is limited only by the appended claims.
Claims
1. A fully automatic backwashing device for a coal gasification black water heat extraction device, characterized in that, The device includes a black water inlet, which is connected to a main inlet pipe. The left and right ends of the main inlet pipe are respectively connected to a left T-junction and a right T-junction. One end of the left T-junction is connected to the inlet of the coal gasification black water heat extraction device, and the other end of the left T-junction is connected to a main outlet pipe, which is connected to a black water outlet. One end of the right T-junction is connected to the outlet of the coal gasification black water heat extraction device, and the other end of the right T-junction is connected to the main outlet pipe.
2. The fully automatic backwashing device for the coal gasification black water heat extraction device according to claim 1, characterized in that, The black water inlet is connected to an inlet branch pipe, which is connected to the main inlet pipe; the main outlet pipe is connected to an outlet branch pipe, which is connected to the black water outlet.
3. The fully automatic backwashing device for the coal gasification black water heat extraction device according to claim 2, characterized in that, An electric valve I is installed between the inlet branch pipe and the left tee; the other end of the left tee is connected to the left outlet pipe, the left outlet pipe is connected to the electric valve IV, and the electric valve IV is connected to the main outlet pipe.
4. The fully automatic backwashing device for the coal gasification black water heat extraction device according to claim 3, characterized in that, An electric valve II is installed between the inlet branch pipe and the right tee; the other end of the right tee is connected to the right outlet pipe, and the right outlet pipe is connected to an electric valve III, which is connected to the main outlet pipe.
5. The fully automatic backwashing device for the coal gasification black water heat extraction device according to claim 4, characterized in that, The electric valves I, II, III, and IV are all electric wear-resistant hemispherical valves.
6. The fully automatic backwashing device for the coal gasification black water heat extraction device according to claim 5, characterized in that, It also includes a PLC control cabinet, which is electrically connected to electric valve I, electric valve II, electric valve III, and electric valve IV, respectively.