Strong brine evaporator

Abstract

The invention relates to a strong brine evaporator which comprises an evaporation barrel, a heating device is arranged in the evaporation barrel, an exhaust pipe is arranged on the upper portion of the evaporation barrel, the heating device heats strong brine in the evaporation barrel through a vertical heat exchange wall, the strong brine evaporator further comprises a scraping device, and the scraping device is attached to the heat exchange wall. And the lifting rod is vertically arranged in the evaporation barrel and drives the scraping device to vertically move. According to the strong brine evaporator, crystals attached to the heat exchange wall can be scraped through movement of the scraping device, so that the situation that the heat exchange efficiency of the heat exchange wall is reduced due to accumulation of the crystals is avoided.

Description

Technical Field

[0001] The invention relates to the field of water treatment, and in particular to a concentrated brine evaporator. Background Art

[0002] Generally, the salt content of the brine after dephenolization, ammonia distillation, biochemical treatment and reuse in coking plants is high. This type of brine is evaporated and crystallized in an evaporator, and the precipitated crystals are used to produce saltpeter products. The current evaporator generally includes an evaporation barrel, in which a heating device is provided. The heating device can be a vertical pipe heating or an interlayer provided in the side wall of the evaporation barrel. A heat source passes through the interlayer to heat the concentrated brine in the evaporation barrel. An exhaust pipe is set on the top of the evaporation barrel, which is connected to the negative equipment and the condenser. Under negative pressure, the concentrated brine is heated to generate steam and discharged from the exhaust pipe. The water in it is condensed and recovered by the condenser, and the precipitated crystals are discharged from the evaporation barrel after evaporation is completed. However, during evaporation, there will always be precipitated crystals attached to the heating tube or the inner wall of the evaporation barrel. When there are too many crystals adsorbed, the heating efficiency and the output of saltpeter products will be reduced. Summary of the Invention

[0003] In order to solve the problems existing in the above technology, the present invention provides a concentrated brine evaporator, comprising an evaporation barrel, a heating device is provided in the evaporation barrel, an exhaust pipe is provided on the upper part of the evaporation barrel, the heating device heats the concentrated brine in the evaporation barrel through a vertical heat exchange wall, and further comprises a scraping device, the scraping device being in contact with the heat exchange wall; A lifting rod is vertically arranged in the evaporation barrel, and the lifting rod drives the scraping device to move vertically.

[0004] Wherein, the top of the lifting rod passes through the top surface of the evaporation barrel; The top surface of the evaporator is provided with a vertical tube sleeved on the outside of the lifting rod, the top of the lifting rod is provided with a container located above the vertical tube, the container has a liquid discharge device, the outside of the lifting rod is sleeved with a spring, the spring is located in the vertical tube, the top end surface of the vertical tube is provided with a magnetic sheet, the magnetic sheet is magnetically attracted to the container; It also includes a condenser communicated with the exhaust pipe, and condensed water of the condenser is discharged into the container.

[0005] Wherein, the liquid discharge device comprises an opening provided on the bottom wall of the container, and a flap is hingedly connected to the top surface of the bottom wall of the container and cooperates with the opening; A vertical rod is provided on the top surface of the evaporation barrel, and the vertical rod is located below the opening.

[0006] A condensation chamber is provided on the top surface of the evaporation barrel, the condenser is located in the condensation chamber, and a drain pipe is provided at the lower part of the side wall of the condensation chamber.

[0007] The condenser is located above the container, the top surface of the container is open, and the drain nozzle of the condenser is located above the container.

[0008] Wherein, a vertical guide rod is provided on the top surface of the evaporation barrel, a vertical guide tube is provided on the bottom surface of the container, and the guide rod is slidably provided in the guide tube.

[0009] Wherein, a jacket is provided inside the side wall of the evaporation barrel, and the heat exchange wall is the inner wall of the evaporation barrel; The scraping device is a scraping ring, and the outer wall of the scraping ring is in contact with the inner wall of the evaporation barrel.

[0010] Wherein, the heating device is a vertical heating tube, and the side wall of the heating tube is the heat exchange wall; The scraping device is a scraping ring, and the inner wall of the scraping ring is in contact with the outer wall of the heating tube.

[0011] The beneficial effect of the present invention is that the concentrated brine evaporator provided by the present invention can scrape off crystals attached to the heat exchange wall through the movement of the scraping device, so as to avoid the accumulation of crystals and reduce the heat exchange efficiency of the heat exchange wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 It is a schematic diagram of the internal structure of the present invention; Figure 2 It is an enlarged view of the condensation chamber of the present invention.

[0014] Description of Reference Numerals 1. Evaporation barrel, 11. Heating tube, 12. Lifting rod, 13. Scraper ring, 14. Connecting rod; 2. Condensation chamber, 21. Vertical pipe, 211. Magnetic sheet, 22. Container, 221. Flap, 23. Vertical rod, 24. Spring, 25. Guide tube, 26. Guide rod, 27. Drain pipe; 3. Condenser, 31. Negative pressure pipe; 4. Exhaust pipe. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0016] like Figure 1 、 Figure 2 As shown in the figure, a concentrated brine evaporator provided in an embodiment includes an evaporation barrel 1, a heating device is provided in the evaporation barrel 1, and an exhaust pipe 4 is provided on the upper part of the evaporation barrel 1. The heating device is used to heat the concentrated brine in the evaporation barrel 1, and the concentrated brine is heated to generate steam and is discharged through the exhaust pipe 4; The heating device exchanges heat with the concentrated brine in the evaporation barrel 1 through the vertical heat exchange wall, and the scraping device is attached to the heat exchange wall and is used to scrape off the crystals on the heat exchange wall; Specifically, in this embodiment, the heating device is a vertical heating tube 11, the side wall of the heating tube 11 is a heat exchange wall, and the heating tube 11 can be an electric heating tube or a vertically arranged heat exchange tube; The scraping device is a scraping ring 13, and the inner wall of the scraping ring 13 is in contact with the outer wall of the heating tube.

[0017] Alternatively, in other embodiments, a jacket is provided inside the side wall of the evaporation barrel 1 , and the heat exchange wall is the inner wall of the evaporation barrel 1 ; the scraping device is a scraping ring 13 , and the outer wall of the scraping ring 13 is in contact with the inner wall of the evaporation barrel 1 .

[0018] The evaporation drum 1 further includes a lifting rod 12 vertically arranged in the evaporation drum 1 , and the lifting rod 12 drives the scraper ring 13 to move vertically through the connecting rod 14 .

[0019] Furthermore, the top of the lifting rod 12 passes through the top surface of the evaporation barrel 1 and extends into the condensation chamber 2 provided above the evaporation barrel 1. The condenser 3 is provided in the condensation chamber 2. The drain pipe 27 is provided at the lower part of the side wall of the condensation chamber 2. The lifting rod 12 is slidably and sealedly connected to the top surface of the evaporation barrel 1. The condenser 3 can be a plate condenser, which includes an outer shell, in which a condensation plate with cooling water is arranged. The exhaust pipe 4 sends steam into the condenser 3 to condense the water. The condensed water is discharged through the drain nozzle at the bottom of the outer shell, and the dehydrated gas is extracted by the negative pressure pipe 31 connected to the negative pressure equipment. This is in the existing technology and will not be repeated here.

[0020] A vertical tube 21 is provided on the top surface of the evaporation drum 1 and is sleeved on the outside of the lifting rod 12. A container 22 is provided on the top of the lifting rod 12 and is located above the vertical tube 21. The container 22 has a liquid discharge device. A spring 24 is sleeved on the outside of the lifting rod 12 and is located inside the vertical tube 21. A magnetic piece 211 is provided on the top end surface of the vertical tube 21, and the magnetic piece 211 is magnetically attracted to the bottom surface of the container 22. The condenser 3 is connected to the end of the exhaust pipe 4. The condenser 3 is located above the container 22. The top surface of the container 22 is open. The drain nozzle of the condenser 3 is located above the container 22 to discharge the condensed water into the container 22.

[0021] The liquid discharge device includes an opening provided on the bottom wall of the container 22. The top surface of the bottom wall of the container 22 is located at the edge of the opening and is hingedly connected to the opening and is equipped with a flap 221. The flap 221 can be flipped upwards. A vertical rod 23 is provided on the top surface of the evaporation barrel 1 , and the vertical rod 23 is located below the opening and is used to lift the flap 221 .

[0022] A vertical guide rod 26 is provided on the top surface of the evaporation drum 1 , and a vertical guide tube 25 is provided on the bottom surface of the container 22 . The guide rod 26 is slidably provided in the guide tube 25 to guide the vertical movement of the container 22 .

[0023] When the present invention is in use, the spring 24 lifts the container 22, the container 22 is no longer attracted to the magnetic sheet 211, the flap 211 closes the opening under the action of gravity, and the drain pipe 27 is closed; Then, concentrated brine is fed into the evaporation barrel 1 and heated by the heating pipe 11. The negative pressure device provides negative pressure to the evaporation barrel 1 through the negative pressure pipe 31, the condenser 3 and the exhaust pipe 4. The concentrated brine evaporates and gradually crystallizes. During this process, some of the crystals adhere to the heat exchange wall of the heating tube 11. The steam discharged from the exhaust pipe 4 is condensed by the condenser 3, and the condensed water formed is discharged into the container 22 and gradually accumulates, causing the container 22 to increase in weight and gradually move downward, thereby carrying the scraper ring 13 downward to scrape off the crystals on the outer wall of the heating tube 11. As the container 22 moves downward, the bottom surface of the container 22 moves to the adsorption range of the magnetic sheet 211 and is adsorbed. At this time, the vertical rod 23 lifts the flap 221, and the condensed water in the container 22 falls from the opening to the bottom of the condensation chamber 2. When necessary, the drain pipe 27 can be opened to discharge the condensed water. As the condensed water in the container 22 is gradually discharged, its weight gradually decreases. When the total weight of the container 22, the water therein, the lifting rod 12, the scraper ring 13 and the connecting rod 14 plus the adsorption force of the magnetic piece 211 is less than the elastic force of the spring 24, the container 22 breaks away from the magnetic piece 211, and the lifting rod 22 is quickly lifted, and the scraper ring 13 is lifted, and the crystals on the outer wall of the heating tube 11 are scraped off again. At the same time, the flap 211 is closed, so that water can accumulate in the container 22 again, and the rapid lifting of the container 22 after breaking away can also shake off some crystals on the hanging ring 13, the connecting rod 14 and the lifting rod 12.

[0024] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A concentrated brine evaporator, comprising an evaporation barrel, a heating device is provided in the evaporation barrel, and an exhaust pipe is provided on the upper part of the evaporation barrel, characterized in that: The heating device heats the concentrated brine in the evaporation barrel through the vertical heat exchange wall, and also includes a scraping device, the scraping device being in contact with the heat exchange wall; A lifting rod is vertically arranged in the evaporation barrel, and the lifting rod drives the scraping device to move vertically.

2. A concentrated brine evaporator according to claim 1, characterized in that: The top of the lifting rod passes through the top surface of the evaporation barrel; The top surface of the evaporator is provided with a vertical tube sleeved on the outside of the lifting rod, the top of the lifting rod is provided with a container located above the vertical tube, the container has a liquid discharge device, the outside of the lifting rod is sleeved with a spring, the spring is located in the vertical tube, the top end surface of the vertical tube is provided with a magnetic sheet, the magnetic sheet is magnetically attracted to the container; It also includes a condenser communicated with the exhaust pipe, and condensed water of the condenser is discharged into the container.

3. A concentrated brine evaporator according to claim 2, characterized in that: The liquid discharge device includes an opening provided on the bottom wall of the container, and a flap hinged on the top surface of the bottom wall of the container and cooperating with the opening; A vertical rod is provided on the top surface of the evaporation barrel, and the vertical rod is located below the opening.

4. A concentrated brine evaporator according to claim 3, characterized in that: A condensation chamber is provided on the top surface of the evaporation barrel, the condenser is located in the condensation chamber, and a drain pipe is provided at the lower part of the side wall of the condensation chamber.

5. The concentrated brine evaporator according to claim 4, characterized in that: The condenser is located above the container, the top surface of the container is open, and the drain nozzle of the condenser is located above the container.

6. A concentrated brine evaporator according to any one of claims 2 to 5, characterized in that: A vertical guide rod is provided on the top surface of the evaporation barrel, a vertical guide tube is provided on the bottom surface of the container, and the guide rod is slidably provided in the guide tube.

7. A concentrated brine evaporator according to any one of claims 1 to 5, characterized in that: A jacket is provided inside the side wall of the evaporation barrel, and the heat exchange wall is the inner wall of the evaporation barrel; The scraping device is a scraping ring, and the outer wall of the scraping ring is in contact with the inner wall of the evaporation barrel.

8. A concentrated brine evaporator according to any one of claims 1 to 5, characterized in that: The heating device is a vertical heating tube, and the side wall of the heating tube is the heat exchange wall; The scraping device is a scraping ring, and the inner wall of the scraping ring is in contact with the outer wall of the heating tube.

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