Flash collection system of slag flushing water evaporator

Abstract

The utility model discloses a flash collection system of a slag flushing water evaporator, which comprises a shell, a slag water inlet is arranged at the top of the shell, a slag water outlet is arranged at the bottom of the shell, a plurality of evaporation chambers are separated in the shell, every two adjacent evaporation chambers are separated by a slag water overflow port, and the slag water overflow ports are horizontally arranged. A negative pressure steam pipeline is arranged on the side wall of the shell and on the side opposite to the slag water overflow port, each evaporation chamber is provided with a metal inclined plate capable of sealing the evaporation chamber, the metal inclined plates are arranged in an inclined mode, and the inclined lower ends of the metal inclined plates are connected with the slag water overflow port, so that the flow direction of negative pressure steam in each evaporation chamber is the side upward flow direction. A first demister is installed between the lower inclined end of the metal inclined plate and the side wall of the shell, and a second demister is installed at a pipeline opening of the negative pressure steam pipeline. According to the demister, slag water, tiny slag cotton and suspended solids entering the demister and the heat exchanger can be effectively reduced, and the problems that the running time of a unit is short, and the demister and the heat exchanger are often scaled and blocked are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial waste heat heating, in particular to a flash evaporation collection system for a slag flushing water evaporator. Background Art

[0002] As energy conservation and emission reduction work continues to deepen, clean heating with industrial waste heat has attracted more and more attention. Recycling low-grade waste heat contained in industrial production as a heat source for urban central heating, these low-grade waste heat recycling and reuse does not consume fuel and produce no pollutants, and is a clean energy. Therefore, effectively recycling and utilizing this part of low-grade waste heat can save energy, reduce carbon emissions, and save water, which has considerable economic and social value.

[0003] Direct heating machine is used for slag flushing water of steel plants and industrial wastewater such as highly corrosive, easy to crystallize, and scaling. It uses the vacuum phase change principle to flash the industrial wastewater into negative pressure steam, which carries a large amount of latent heat of vaporization and enters the heat exchanger in the form of steam to condense and release heat, thereby completing heat exchange with low-temperature fluid. Evaporator is a device that uses the vacuum phase change principle to flash a small amount of industrial wastewater into negative pressure steam, and introduces the negative pressure steam into the heat exchanger for heat exchange. However, since the composition of slag flushing water is very complex, containing a large amount of tiny slag cotton and suspended matter, during the negative pressure flash evaporation process, after the slag water enters the evaporation chamber, it expands and splashes rapidly due to the negative pressure, and some of the slag water fails to become steam through the negative pressure within the effective time. Due to the horizontal flow of negative pressure steam, some of the slag water, tiny slag cotton, and suspended matter will enter the demister and heat exchanger together with the negative pressure steam. After running for about half a month, the demister and heat exchanger will be blocked, affecting the heat exchange efficiency. Once blockage occurs, the blockage will be accelerated at a geometric rate until it is completely blocked and no heat exchange occurs. How to fully and effectively reduce the slag water, tiny slag cotton, and suspended matter entering the demister and heat exchanger has become the key to utilizing the waste heat recovery of slag flushing water. Utility Model Content

[0004] The utility model aims to provide a flash collection system for a slag flushing water evaporator to solve the above problems existing in the prior art.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] The utility model discloses a flash collection system for a slag flushing water evaporator, comprising a shell, a slag water inlet is arranged on the top of the shell, and a slag water outlet is arranged on the bottom of the shell, a plurality of evaporation chambers are separated in the shell, and two adjacent evaporation chambers are separated by a slag water overflow port, the slag water overflow port is arranged horizontally, a negative pressure steam pipeline is arranged on the side wall of the shell and on the side opposite to the slag water overflow port, each of the evaporation chambers is provided with a metal inclined plate that can seal the evaporation chamber, the metal inclined plate is inclined and the inclined lower end is connected to the slag water overflow port, so that the flow direction of the negative pressure steam in each of the evaporation chambers is a side-up flow direction, a first demister is installed between the inclined lower end of the metal inclined plate and the side wall of the shell, and a second demister is installed at the pipe mouth of the negative pressure steam pipeline.

[0007] Furthermore, a plurality of high-pressure nozzles for backwashing the first demister are installed at the bottom of the metal inclined plate, so that the attachments on the first demister are discharged from the slag water overflow port.

[0008] Furthermore, a defogger fixing plate is fixedly connected to a downwardly inclined end of the metal inclined plate, and the first defogger is mounted on the defogger fixing plate.

[0009] Furthermore, the defogger fixing plate is fixed to the metal inclined plate by welding.

[0010] Furthermore, the first demister is divided into four parts and placed on the demister fixing plate for easy disassembly and inspection and maintenance.

[0011] Furthermore, a gap is left between the slag water overflow port and the inner wall of the shell.

[0012] Furthermore, the shell is provided with a plurality of individual holes.

[0013] Compared with the prior art, the beneficial technical effects of the utility model are:

[0014] The flash collection system of the slag flushing water evaporator of the utility model can prevent impurities in the slag water from being retained and scaling in the evaporation chamber of the evaporator by installing a metal inclined plate, and can also effectively isolate the slag water from contacting the demister, while changing the negative pressure steam flow direction from the horizontal to the side, and guiding the slag flushing water that has not flashed into negative pressure steam into the slag water overflow port, thereby reducing the retention time of the slag water; at the same time, by installing a double-layer demister, it can effectively reduce tiny slag cotton and suspended matter entering the heat exchanger with the negative pressure steam, wherein, after the first demister has passed through the negative pressure steam for a long time, the rotary high-pressure nozzle installed on the metal inclined plate is opened to backwash the first demister, and the slag cotton and impurities on the first demister can be discharged through the slag water overflow port through the flushing effect.

[0015] The flash collection system of the slag water evaporator of the utility model has a highly efficient anti-scaling effect, which can effectively reduce the entry of slag water, tiny slag cotton and suspended matter into the demister and heat exchanger, solves the problems of short unit operation time, frequent scaling and clogging of the demister and heat exchanger, and is of great significance to the recovery and utilization of secondary energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a cross-sectional structural schematic diagram of the flash evaporation collection system of the slag flushing water evaporator of the utility model;

[0018] Figure 2 It is a schematic diagram of the unfolded structure of the metal inclined plate of the flash collection system of the slag flushing water evaporator of the utility model;

[0019] Figure 3 It is a schematic diagram of the internal top view structure of the flash evaporation collection system of the slag flushing water evaporator of the utility model.

[0020] Explanation of the reference numerals: 1. outer shell; 2. slag water inlet; 3. slag water outlet; 4. slag water overflow; 5. negative pressure steam pipe; 6. metal inclined plate; 7. manhole; 8. first demister; 9. second demister; 10. high-pressure nozzle; 11. demister fixing plate. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0022] In the description of the present utility model, it should be understood that the terms "length", "width", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The technical solution provided by the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings.

[0025] like Figures 1 to 3 As shown, the flash evaporation collection system of the slag water evaporator of this embodiment includes a shell 1, a slag water inlet 2 is arranged on the top of the shell 1, and a slag water outlet 3 is arranged on the bottom. A plurality of evaporation chambers are separated in the shell 1, and two adjacent evaporation chambers are separated by a slag water overflow port 4 and a metal inclined plate 6. The slag water overflow port 4 is arranged horizontally, and a gap is left between the slag water overflow port 4 and the inner wall of the shell 1 to facilitate welding of the water guide port. A negative pressure steam pipe 5 is arranged on the side wall of the shell 1 and on the side opposite to the slag water overflow port 4. Each evaporation chamber is provided with a metal inclined plate 6 that can seal the evaporation chamber. At this time, the specific structural shape of the metal inclined plate 6 is as shown in FIG. Figure 2 As shown, the metal inclined plate 6 is inclined and the inclined end is connected to the slag water overflow port 4, so that the negative pressure steam in each evaporation chamber flows in the side-up direction. A first demister 8 is installed between the inclined end of the metal inclined plate 6 and the side wall of the shell 1, and a second demister 9 is installed at the pipe opening of the negative pressure steam pipe 5. By adopting the double-layer protection of the first demister 8 and the second demister 9, the working efficiency and service life of the heat exchanger can be better protected. At this time, a plurality of individual holes 7 are provided on the shell 1.

[0026] like Figure 1As shown, in the flash collection system of the slag flushing water evaporator of this embodiment, five evaporation chambers are separated by four slag water overflow ports 4 in the shell 1, and correspondingly, five negative pressure steam pipes 5 are also provided, and a manhole 7 is provided in each evaporation chamber.

[0027] Preferably, in order to prevent the first demister 8 from being blocked, a plurality of high-pressure nozzles 10 for backwashing the first demister 8 are installed at the bottom of the metal inclined plate 6 so that the attachments on the first demister 8 can be discharged from the slag water overflow port.

[0028] And, if Figure 3 As shown, the lower end of the metal inclined plate 6 is fixedly connected with a defogger fixing plate 11, and the first defogger 8 is mounted on the defogger fixing plate 11. Preferably, the defogger fixing plate 11 and the metal inclined plate 6 are fixed by welding, and the first defogger 8 can be divided into four pieces and placed on the defogger fixing plate 11 for easy disassembly and inspection and maintenance.

[0029] When the flash collection system of the slag flushing water evaporator of this embodiment is in use, the impurities in the slag water can be prevented from being retained in the evaporation chamber of the evaporator and scaling by installing the metal inclined plate 6, and the contact between the slag water and the demister can be effectively isolated, and the negative pressure steam can be changed from a horizontal flow direction to a side flow direction, and the slag flushing water that has not flashed into negative pressure steam can be guided into the slag water overflow port 4, thereby reducing the retention time of the slag water; at the same time, by installing a double-layer demister, it is possible to effectively reduce the entry of tiny slag wool and suspended matter into the heat exchanger with the negative pressure steam, wherein, after the first demister 8 has been subjected to negative pressure steam for a long time, the rotary high-pressure nozzle 10 installed on the metal inclined plate 6 is opened to backwash the first demister 8, and the slag wool and impurities on the first demister 8 can be discharged through the slag water overflow port 4 through the flushing effect.

[0030] The flash collection system of the slag water evaporator of the utility model has a highly efficient anti-scaling effect, which can effectively reduce the entry of slag water, tiny slag cotton and suspended matter into the demister and heat exchanger, solves the problems of short unit operation time, frequent scaling and clogging of the demister and heat exchanger, and is of great significance to the recovery and utilization of secondary energy.

[0031] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A flash collection system for slag flushing water evaporator, characterized by: The invention comprises an outer shell, wherein a slag water inlet is arranged on the top of the outer shell, and a slag water outlet is arranged on the bottom of the outer shell, a plurality of evaporation chambers are separated in the outer shell, and two adjacent evaporation chambers are separated by a slag water overflow port, and the slag water overflow port is arranged horizontally, and a negative pressure steam pipe is arranged on the side wall of the outer shell and opposite to the slag water overflow port, and each of the evaporation chambers is provided with a metal inclined plate which can seal the evaporation chamber, and the metal inclined plate is arranged obliquely and the inclined lower end is connected with the slag water overflow port, so that the flow direction of the negative pressure steam in each of the evaporation chambers is an upward side flow direction, a first demister is installed between the inclined lower end of the metal inclined plate and the side wall of the outer shell, and a second demister is installed at the pipe mouth of the negative pressure steam pipe.

2. A slag flushing water evaporator flash collection system according to claim 1, characterized in that: A plurality of high-pressure nozzles for backwashing the first demister are installed at the bottom of the metal inclined plate, so that the attachments on the first demister are discharged from the slag water overflow port.

3. A slag flushing water evaporator flash collection system according to claim 1, characterized in that: A defogger fixing plate is fixedly connected to a downwardly inclined end of the metal inclined plate, and the first defogger is mounted on the defogger fixing plate.

4. A slag flushing water evaporator flash collection system according to claim 3, characterized in that: The defogger fixing plate is fixed to the metal inclined plate by welding.

5. A slag flushing water evaporator flash collection system according to claim 3, characterized in that: The first demister is divided into four parts and placed on the demister fixing plate for easy disassembly and inspection and maintenance.

6. A slag flushing water evaporator flash collection system according to claim 1, characterized in that: A gap is left between the slag water overflow port and the inner wall of the shell.

7. A slag flushing water evaporator flash collection system according to any one of claims 1-6, characterized in that: The shell is provided with a plurality of individual holes.

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