Steam heating sedimentation washing water tank

Abstract

The utility model belongs to the technical field of sedimentation washing water tanks, and particularly relates to a steam heating sedimentation washing water tank which comprises a sedimentation washing water tank body, a heating steam main pipe and a plurality of heating steam branch pipes. The length of the part, extending into the sedimentation washing water tank body, of the second end of the heating steam branch pipe is 1-2 m, and a plurality of vent holes with the hole diameter ranging from 3 mm to 7 mm are formed in the pipe wall of the second end of the heating steam branch pipe. The device can ensure that steam does not emerge in a bubble form, can fully ensure the steam introduction amount and the steam introduction rate, is more beneficial to internal circulation of cold and hot water in the tank, and is beneficial to balanced improvement of the washing water temperature. Moreover, the heating steam branch pipes are respectively provided with a high-pressure valve and a flow meter, the flow meters are used for detecting and displaying the real-time steam passing amount, and the high-pressure valves can flexibly control on and off of steam.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of settling washing water tank, and specifically relates to a steam heating settling washing water tank. BACKGROUND

[0002] In the production of alumina, bauxite is dissolved by high-temperature and high-concentration lye, and aluminum enters the solution, and the remaining waste residue is red mud. The settling process is responsible for treating the red mud. First, a separation settling tank is used to separate the liquid and solid of the bauxite slurry after dissolution of the bauxite, and then hot water is used to wash the red mud slurry four times, and finally the washed red mud slurry is pressed into filter cake by a filter press. The red mud separation and washing process uses 7 settling tanks, including separation (2), first washing, second washing, third washing, fourth washing, and fifth washing. In this process, sodium aluminate solution will undergo hydrolysis reaction, and the chemical equation is: NaAl(OH)4 + aq→ Na(OH) + Al(OH)3↓ + aq, and the alumina loss enters the red mud. At this time, the solid material red mud A / S (the mass ratio of alumina to silicon oxide in the red mud) increases, and the liquid material ak (the molar ratio of caustic sodium oxide to alumina in the sodium aluminate solution) increases, ultimately leading to the red mud A / S and the refined liquid ak of the settling process exceeding the standard, affecting the comprehensive recovery rate of alumina and the efficiency of lye circulation. Effective measures can be taken to optimize the red mud A / S and the refined liquid ak indicators to reduce the production cost of alumina. With the decrease of ore grade year by year, the unit consumption of raw materials, energy consumption and other items is increasing, and it is of great significance to study how to reduce the loss of alumina in the red mud separation and washing process through device innovation and fine operation, etc. for alumina enterprises to reduce production cost.

[0003] Increasing the temperature of the washing water plays an important role in improving the washing efficiency and enhancing the washing effect. The main sources of heat in the red mud washing process include the separation of the underflow slurry and the red mud washing hot water. The temperature of the underflow slurry is difficult to increase due to the influence of the incoming material in the dissolution process, so it is necessary to heat the washing water in the washing tank to increase the washing temperature. The commonly used heating method is to directly pass the secondary steam of the dissolution unit and part of the new steam into the washing tank through a pipeline to heat the washing water. The problem of directly passing the steam into the washing water is that: first, the steam flow is difficult to control, so the temperature of the washing water is unstable; second, the steam is directly passed into the washing water, which is very easy to come out in the form of bubbles, the heat exchange efficiency is low, and the heat is easily lost into the air, which is a serious waste. UTILITY MODEL CONTENTS

[0004] In view of the problems existing in the prior art, the utility model provides a steam heating settling washing water tank, which specifically includes the following contents:

[0005] A steam-heated settling water tank comprises a settling water tank body, a heating steam main pipe, and multiple heating steam branch pipes. The settling water tank body has a diameter of 8-12 meters and a height of 10-12 meters. The bottom of the settling water tank body is funnel-shaped, wide at the top and narrow at the bottom, and is provided with multiple reserved holes. The funnel-shaped bottom of the settling water tank body reduces the space at the bottom. When hot steam enters the wash water at the bottom of the tank body through the pipe vents, the temperature of the wash water at the bottom rises faster, causing the hot water to rise and the cold water to fall, further facilitating the internal circulation of hot and cold water within the tank and facilitating a balanced increase in the wash water temperature.

[0006] The diameter of the heating steam main pipe is larger than the diameter of the heating steam branch pipe; the diameter of the heating steam branch pipe is 120-160mm; the heating steam branch pipe includes a first end and a second end, the first end of the heating steam branch pipe is connected to the heating steam main pipe, and the second end extends into the interior of the sedimentation washing water tank body through the reserved hole at the bottom of the sedimentation washing water tank body, and a sealing device is provided at the intersection of the outer pipe wall of the heating steam branch pipe and the reserved hole; the length of the part of the second end of the heating steam branch pipe extending into the interior of the sedimentation washing water tank body is 1-2m. If it is extended too long, hot steam will easily emerge from the washing water, resulting in heat waste. If it is extended too short, it will easily cause insufficient ventilation. Extending 1-2m can ensure that steam will not emerge in the form of bubbles, and can fully ensure the steam ventilation volume and steam ventilation rate. The wall of the second end of the heating steam branch pipe is provided with a plurality of vent holes with an aperture of 3-7 mm. If the vent holes are too large, bubbles will easily appear, which will reduce the heat exchange efficiency and cause heat waste. If the vent holes are too small, it will not be conducive to heat exchange through steam. The aperture is set at 3-7 mm to achieve the best heating effect. It should be noted that in order to ensure the heat exchange effect, the number of vent holes at the second end of the heating steam branch pipe is preferably not less than 100. The heating steam branch pipe is provided with a high-pressure valve and a flow meter. The flow meter is used to detect and display the real-time steam flow rate, and the high-pressure valve can flexibly control the switch of the steam.

[0007] Preferably, the diameter of the heating steam branch pipe is 145-155 mm, more preferably 150 mm.

[0008] Preferably, the length of the portion of the second end of the heating steam branch pipe extending into the interior of the sedimentation washing tank body is 1.4-1.6 m, more preferably 1.5 m.

[0009] Preferably, the diameter of the vent hole on the tube wall of the second end of the heating steam branch pipe is between 4-6 mm, more preferably 5 mm.

[0010] Preferably, the plurality of vent holes are evenly distributed on the tube wall of the second end of the heating steam branch pipe.

[0011] Preferably, the second end of the heating steam branch pipe and the bottom of the sink body form an angle of 85-95 degrees, and more preferably 90 degrees.

[0012] The present application has the following advantages:

[0013] The steam heating sink of the present application comprises a sink body, a heating steam main pipe and a plurality of heating steam branch pipes, wherein the bottom of the sink body is funnel-shaped, the bottom of the sink body is funnel-shaped, so that the space of the bottom is smaller, when the hot steam enters the sink body through the pipe vent, the temperature of the water in the bottom rises faster, and the hot water rises and the cold water falls, which is beneficial to the internal circulation of the hot and cold water in the sink and to the balanced increase of the water temperature.

[0014] The second end of the heating steam branch pipe is limited to 1-2m in length, because too long will cause the hot steam to easily escape from the water, resulting in heat waste, and too short will cause insufficient ventilation, and 1-2m can ensure that the steam does not escape in the form of bubbles, and can fully ensure the ventilation amount and ventilation rate.

[0015] The second end of the heating steam branch pipe is limited to 1-2m in length, because too long will cause the hot steam to easily escape from the water, resulting in heat waste, and too short will cause insufficient ventilation, and 1-2m can ensure that the steam does not escape in the form of bubbles, and can fully ensure the ventilation amount and ventilation rate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure of the device of the present application is shown in the figure. DETAILED DESCRIPTION

[0017] The present application will be described in detail below with reference to the drawings and specific embodiments. The embodiments shown below do not limit the content of the application as claimed in the claims. In addition, the entire content of the embodiments shown below is not limited to the solution necessary for the application as claimed in the claims.

[0018] Reference is made to the drawings Figure 1The utility model provides a steam heating sedimentation washing tank, including sedimentation washing tank body 5, heating steam main pipe 1, a plurality of heating steam branch pipe 3, the diameter of sedimentation washing tank body is 8 12m, and the height is 10 12m, the bottom of sedimentation washing tank body 5 is funnel -shaped and is wide at the top and narrow at the bottom, and a plurality of reserved holes are arranged on the bottom of sedimentation washing tank body 5, the bottom of sedimentation washing tank body 5 is arranged funnel -shaped, so that the space of the bottom becomes smaller, when hot steam enters the washing water in the bottom of tank body 5 through the pipe air hole 4, the temperature of the washing water in the bottom rises faster, and then the hot water rises and the cold water falls, which is more conducive to the internal circulation of hot and cold water in the tank and the balanced increase of the washing water temperature, the diameter of heating steam main pipe 1 is larger than the diameter of heating steam branch pipe 3, the diameter of heating steam branch pipe 3 is 120 160mm, heating steam branch pipe 3 includes first end and second end, the first end of heating steam branch pipe 3 is connected with heating steam main pipe 1, and the second end extends into the inside of sedimentation washing tank body 5 through the reserved hole in the bottom of sedimentation washing tank body 5, sealing device is arranged at the intersection of the outer pipe wall of heating steam branch pipe 3 and the reserved hole, the length of the part of the second end of heating steam branch pipe 3 extending into the inside of sedimentation washing tank body 5 is 1 2m, too long extension can make hot steam easily come out from the washing water, causes heat waste, and too short extension can also cause insufficient air passage, and the extension of 1 2m can guarantee that steam does not come out in the form of bubble and can fully guarantee the air passage and air passage rate, a plurality of air holes 4 with the aperture of 3 7mm are arranged on the pipe wall of the second end of heating steam branch pipe 3, too large air hole can lead to easy bubble, reduces heat exchange efficiency, causes heat waste, and too small air hole is not conducive to steam heat exchange, and the aperture of 3 7mm can achieve the best heating effect, it is needful to note that, in order to guarantee heat exchange effect, the number of air hole 4 is preferably not less than 100, high pressure valve 3 and flowmeter 6 are arranged on heating steam branch pipe 3, flowmeter 6 is used to detect and display real time air passage, and high pressure valve 3 can flexibly control the switch of steam.

[0019] In some embodiments of the utility model, the diameter of heating steam branch pipe 3 is 145 155mm, preferably 150mm.

[0020] In some embodiments of the utility model, the length of the part of the second end of heating steam branch pipe 3 extending into the inside of sedimentation washing tank body 5 is 1.4 1.6m, preferably 1.5m.

[0021] In some embodiments of the utility model, the aperture of air hole 4 on the pipe wall of the second end of heating steam branch pipe 3 is between 4 6mm, preferably 5mm.

[0022] In some embodiments of the utility model, the plurality of air holes 4 are evenly distributed on the pipe wall of the second end of heating steam branch pipe 3.

[0023] In some embodiments of the utility model, the included angle between the second end of the heating steam branch pipe 3 and the bottom of the settling washing water tank body 5 is 85-95 degrees, and more preferably 90 degrees.

[0024] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] Unless otherwise expressly specified and limited, the terms "provided", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steam heated sink for a sink process, characterized in that The sink body, the heating steam main pipe, the plurality of heating steam branch pipes, The diameter of the sink body is 8-12 m, and the height is 10-12 m; the bottom of the sink body is funnel-shaped with a wide top and a narrow bottom, and a plurality of reserved holes are arranged on the bottom of the sink body; The diameter of the heating steam main pipe is greater than that of the heating steam branch pipe. The diameter of the heating steam branch pipe is 120-160 mm; the heating steam branch pipe comprises a first end and a second end, the first end of the heating steam branch pipe is connected with the heating steam main pipe, the second end of the heating steam branch pipe extends into the sink body through the reserved hole on the bottom of the sink body, a sealing device is arranged at the intersection between the outer pipe wall of the heating steam branch pipe and the reserved hole, the length of the second end of the heating steam branch pipe extending into the sink body is 1-2 m, a plurality of air holes with a diameter of 3-7 mm are arranged on the pipe wall of the second end of the heating steam branch pipe, and a high-pressure valve and a flow meter are arranged on the heating steam branch pipe.

2. A steam heated sink for use in a sink process according to claim 1, wherein The diameter of the heating steam branch pipe is 145-155 mm.

3. A steam heated sink for use in a sink process according to claim 1, wherein The length of the second end of the heating steam branch pipe extending into the sink body is 1.4-1.6 m.

4. A steam-heated sink according to claim 1, wherein, The diameter of the air hole on the pipe wall of the second end of the heating steam branch pipe is 4-6 mm.

5. A steam heated sink for use in a sink process according to claim 1, wherein The plurality of air holes are uniformly distributed on the pipe wall of the second end of the heating steam branch pipe.

6. The steam-heated sink of any one of claims 1 to 5, wherein, The included angle between the second end of the heating steam branch pipe and the bottom of the sink body is 85°-95°.

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