Waste heat recycling device for spray return water in desalting pool

Abstract

The utility model discloses a waste heat recycling device for spraying backwater in a desalting water tank, which comprises a water spraying desalting water tank, a washing water desalting water tank and a water sprayer, the water spraying desalting water tank is connected with the water sprayer through a spraying water pipeline, and a washing water pipeline is mounted on the washing water desalting water tank; the system further comprises a filter tank, the water sprayer is connected with the filter tank through a water return guide pipe, the filter tank is connected with the water spraying desalination water tank through a water spraying water return main pipe and a heat exchanger, and a water spraying water return branch pipe is arranged on the water spraying water return main pipe. The washing water desalination device is reasonable in structural design, the washing water desalination pool is heated through water spraying return water, heat exchange is carried out through the heat exchanger, heat of high-temperature water spraying return water is utilized, on the basis that steam consumption is reduced, the water spraying heat exchange effect can be effectively improved, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to titanium dioxide production technical field especially relates to a kind of waste heat recovery and utilization devices of spray backwater in desalination pool. BACKGROUND

[0002] Titanium dioxide is the scientific name of titanium dioxide (Titanium Dioxide), it is a dye and pigment. Titanium dioxide is a very important raw material in industrial production, widely used in coatings, plastics, papermaking, printing ink, chemical fiber, rubber, cosmetics, ceramics, enamel, electronics, food and pharmaceutical industries.

[0003] In the production process of titanium dioxide, the temperature of desalination water is above 95℃ after heat exchange by water sprayer, and it flows back to water spray desalination pool. Because the water in desalination pool is recycled, the temperature is kept at about 92℃ for a long time, which will seriously affect the heat exchange effect of water spray, and also affect the service life of fan and produce large amount of chimney steam. In addition, the desalination pool is required to provide washing water for the pressure filtration washing post in the production system process, and the water temperature should be 45-60℃. Under normal circumstances, the water temperature is the same as the environment temperature, so steam is needed to heat it, which increases the production cost. Therefore, we design a kind of waste heat recovery and utilization device of spray backwater in desalination pool to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at solving the problems existing in the prior art, and provides a kind of waste heat recovery and utilization device of spray backwater in desalination pool, which heats washing water desalination pool by water spray backwater, and utilizes the heat of high-temperature water spray backwater by heat exchanger, which can effectively improve the heat exchange effect of water spray and reduce production cost on the basis of reducing steam consumption.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A kind of waste heat recovery and utilization device of spray backwater in desalination pool, including water spray desalination pool, washing water desalination pool and water sprayer, the water spray desalination pool is connected by spray water pipe line between water sprayer, washing water desalination pool is installed with wash water pipe line;

[0007] It also includes filter pool, the water sprayer is connected by backwater guide pipe between filter pool, the filter pool is connected by water spray backwater main pipe and heat exchanger between water spray desalination pool, water spray backwater main pipe is equipped with water spray backwater branch pipe, first valve is installed on water spray backwater branch pipe, second valve is installed on water spray backwater main pipe.

[0008] Preferably, water pump is arranged in the water spray desalination pool, and the water pump is connected with the spray water pipe line.

[0009] Preferably, the water spray return water branch pipe is located between the second valve and the heat exchanger.

[0010] Preferably, the water spray is provided with a steam inlet pipeline and a steam exhaust pipeline.

[0011] Preferably, the water spray desalination water tank, the washing water desalination water tank, the water spray and the heat exchanger are all provided with thermometers.

[0012] Preferably, the upper end of the water spray desalination water tank is provided with a first desalination water supplement pipeline, and the upper end of the washing water desalination water tank is provided with a second desalination water supplement pipeline.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. The waste heat recycling device for water spray return in the desalination water tank can filter the high-temperature desalination water obtained after the desalination water absorbs the heat of steam in the water spray, reduce the phenomenon of scale formation on the inner wall of the pipeline caused by impurities in the high-temperature desalination water, and recycle the heat after the filtered high-temperature desalination water enters the heat exchanger through the water spray return main pipe and then returns to the water spray desalination water tank, thereby saving production cost.

[0015] 2. The waste heat recycling device for water spray return in the desalination water tank can control the opening of the first valve to supplement and heat the washing water desalination water tank according to the temperature change of the washing water desalination water tank, so that the temperature and the supplement of water reach balance, and production cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model provides a kind of waste heat recycling device for water spray return in desalination water tank external structure schematic diagram;

[0017] Figure 2 The utility model provides a kind of waste heat recycling device for water spray return in desalination water tank main view plane structure schematic diagram;

[0018] Figure 3 The utility model provides a kind of waste heat recycling device for water spray return in desalination water tank internal structure schematic diagram;

[0019] Figure 4 The utility model provides a kind of waste heat recycling device for water spray return in desalination water tank work block diagram.

[0020] In the figure: 1. Water spray desalination tank; 2. Washing water desalination tank; 3. First desalted water feed pipeline; 4. Second desalted water feed pipeline; 5. Water sprinkler; 6. Water spray return water main; 7. Water spray return water branch pipe; 8. Spray water pipeline; 9. Washing water pipeline; 10. First valve; 11. Second valve; 12. Filter tank; 13. Return water conduit; 14. Heat exchanger. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] Reference Figures 1-4 A waste heat recovery and utilization device for spraying return water in a desalted water tank includes a water spray desalted water tank 1, a washing water desalted water tank 2, and a water sprayer 5. A washing water pipeline 9 is installed on the washing water desalted water tank 2. The water spray desalted water tank 1 and the water sprayer 5 are connected by a spray water pipeline 8. A water pump is provided in the water spray desalted water tank 1, and the water pump is connected to the spray water pipeline 8, so that the desalted water in the water spray desalted water tank 1 can enter the water sprayer 5 to spray and cool the hot steam generated during the titanium dioxide processing;

[0023] The water sprayer 5 is provided with a steam inlet pipe and a steam exhaust pipe, which can allow the hot steam generated during the titanium dioxide processing to enter the water sprayer 5 for spray cooling and then be emptied. The water sprayer 5 is internally provided with a swirl plate, a water nozzle, a dehydration plate and other structures, which can spray and cool the hot steam. Its structure and working principle are all existing technologies and will not be described in detail here.

[0024] The filter tank 12 is also included. The water sprinkler 5 is connected to the filter tank 12 through a return water conduit 13. A filter plate is provided in the filter tank 12, which can filter the high-temperature desalted water obtained after the desalted water absorbs the heat of steam in the water sprinkler 5, remove impurities in the high-temperature desalted water, and thus reduce the impurities adhering to the inner wall of the pipe to cause scaling. The front plate of the filter tank 12 is detachably sealed, which is convenient for opening it to clean the inside of the filter tank 12. The filter tank 12 is connected to the water spray desalted water tank 1 through a water spray return water pipe 6 and a heat exchanger 14. The heat exchanger transfers heat from a fluid with a higher temperature to a fluid with a lower temperature. It is one of the main devices for improving energy utilization. Its structure and working principle are all existing technologies and will not be described in detail here.

[0025] The water spraying backwater branch pipe 7 is provided with a first valve 10, and the water spraying backwater main pipe 6 is provided with a second valve 11.

[0026] The water spraying desalination water pool 1, the washing water desalination water pool 2, the water sprayer 5 and the heat exchanger 14 are all provided with thermometers, so that the internal temperature can be measured.

[0027] The upper end of the water spraying desalination water pool 1 is provided with a first desalination water supplement pipeline 3, so that fresh desalination water can be supplemented into the water spraying desalination water pool 1.

[0028] The function principle of the present application can be described as follows:

[0029] In the present application, the hot steam generated in the titanium dioxide processing process enters the water sprayer 5, is discharged after being cooled by water spraying, and the desalination water absorbs the heat of the steam to obtain high-temperature desalination water. The high-temperature desalination water is filtered in the filter tank 12 through the backwater guide pipe 13, and the impurities in the high-temperature desalination water are filtered out, so that the impurities are not attached to the inner wall of the pipeline to cause scaling. The high-temperature desalination water filtered by the filter tank 12 enters the heat exchanger 14 through the water spraying backwater main pipe 6 to exchange heat, and the cold water heated in the heat exchanger 14 can be used for heating in winter or other purposes. The high-temperature desalination water cooled after heat exchange in the heat exchanger 14 is circulated in the water spraying desalination water pool 1.

[0030] The water spraying backwater branch pipe 7 is added to the water spraying backwater main pipe 6 of the water spraying backwater desalination tank 1, and according to the temperature change in the washing water desalination tank 2, the opening of the first valve 10 is controlled to enable high-temperature desalination water to enter the washing water desalination tank 2, so that the washing water desalination tank 2 is water-supplied and heated, the temperature is balanced with the water supply, and the temperature is controlled to be between 45-60 DEG C. When the water level of the water spraying desalination tank 1 is lower than the specified level, fresh desalination water is supplied to the water spraying desalination tank 1 through the first desalination water supply pipeline 3, so that the water spraying desalination tank 1 is water-supplied and cooled. Fresh desalination water can be supplied to the washing water desalination tank 2 through the second desalination water supply pipeline 4, and the desalination water with a certain temperature entering the washing water desalination tank 2 is used for the water washing process of titanium dioxide, so that the heat in the desalination water is fully recovered and utilized, the water consumption is reduced, the water resource is saved, and the production cost is reduced.

[0031] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A waste heat recovery device for spraying return water in a desalted water tank, comprising a water spraying desalted water tank (1), a washing water desalted water tank (2) and a water sprayer (5), characterized in that: The water spray desalination tank (1) and the water sprayer (5) are connected via a spray water pipeline (8), and a washing water pipeline (9) is installed on the washing water desalination tank (2); The invention also includes a filter pool (12), wherein the water sprayer (5) is connected to the filter pool (12) via a return water conduit (13), and the filter pool (12) is connected to the water spray desalination pool (1) via a water spray return water main (6) and a heat exchanger (14). The water spray return water main (6) is provided with a water spray return water branch pipe (7), and the water spray return water branch pipe (7) is installed with a first valve (10), and the water spray return water main pipe (6) is installed with a second valve (11).

2. The waste heat recovery device for spraying return water in a desalinated water pool according to claim 1, characterized in that: A water pump is provided in the water spray desalination pool (1), and the water pump is connected to the spray water pipeline (8).

3. The waste heat recovery device for spraying return water in a desalinated water pool according to claim 1 is characterized in that: The water spray return branch pipe (7) is located between the second valve (11) and the heat exchanger (14).

4. The waste heat recovery device for spraying return water in a desalinated water pool according to claim 1, characterized in that: The water sprinkler (5) is provided with a steam intake pipe and a steam exhaust pipe.

5. The waste heat recovery device for spraying return water in a desalinated water pool according to claim 1, characterized in that: The water spray desalination tank (1), the washing water desalination tank (2), the water sprayer (5) and the heat exchanger (14) are all provided with thermometers.

6. The waste heat recovery device for spraying return water in a desalinated water pool according to claim 1, characterized in that: A first desalted water replenishment pipeline (3) is installed through the upper end of the water spray desalted water tank (1), and a second desalted water replenishment pipeline (4) is installed through the upper end of the washing water desalted water tank (2).

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