A device for recycling condensed water in titanium dioxide production

Abstract

The present invention discloses a device for recycling condensed water in titanium dioxide production, including a high-pressure superheated steam pulverizer, the output end of which is connected to a bag filter, the bag filter is connected to a condensing mechanism, the condensing mechanism includes a condensing tank, a collecting box and a plurality of pairs of convex covers, a plurality of condensing pipes are arranged between each pair of convex covers, a fan is also installed on the convex cover, and a filter, a centrifugal pump and a filter press washing water tank are arranged on the side of the collecting box in sequence. In the present invention, a condensing mechanism is arranged, and the separated steam is passed into the condensing mechanism, so that the steam contacts the condensing pipe after entering the interior of the condensing tank, so that the steam can condense on the surface of the condensing pipe, and the condensed water flows downward into the collecting box to be collected, so as to achieve the purpose of collecting the steam and enable the condensed water to be collected and reused.

Description

Technical Field

[0001] The invention belongs to the technical field of titanium dioxide production equipment, and specifically relates to a condensed water recycling device in titanium dioxide production. Background Art

[0002] The steam-powder process in titanium dioxide production requires the use of high-pressure superheated steam as a pulverizing medium to perform airflow pulverization on the titanium dioxide particles to meet usage requirements. After the titanium dioxide particles are pulverized by the airflow, the steam and titanium dioxide are separated by bag filters and discharged separately.

[0003] Patent CN201921973794.4 discloses a device for producing titanium dioxide by an air flow mill, including an air flow mill, a metal flexible connection and an outlet pipe. One input port of the air flow mill has a steam nozzle, and the other input port has a feed pipe. The end of the feed pipe has a feed nozzle, and the middle of the feed pipe has a feed port. The patent uses an air flow mill to crush titanium dioxide. The fineness of the final product can reach 325 meshes, which improves the product quality. Patent CN202111119299.9 discloses a titanium dioxide air flow crushing method, including S1: crushing the crude titanium dioxide through a powder mill to obtain titanium dioxide The titanium dioxide raw material in step 1 is poured into an air flow mill for air flow pulverization; S3: the titanium dioxide raw material after air flow pulverization in step 2 is poured into an air flow mill for air flow pulverization again: at the same time, an inorganic treatment agent is poured into the air flow mill; S4: the particle size range of the product particles obtained in step 3 is detected, and the titanium dioxide that passes the test is collected. The present invention improves the efficiency and speed of air flow pulverization by first pulverizing the crude titanium dioxide with a powder mill and then performing the first air flow pulverization. After two air flow pulverizations and mixing with the inorganic treatment agent, fine titanium dioxide with high weather resistance can be obtained.

[0004] When high-pressure superheated steam is used to crush titanium dioxide particles, a large amount of high-temperature steam will be discharged, causing a large amount of water in the steam to be discharged together, thereby causing a waste of water resources and being detrimental to environmental protection.

[0005] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0006] The object of the present invention is to provide a condensed water recycling device in titanium dioxide production to solve the above-mentioned problems in the prior art.

[0007] To achieve the above-mentioned purpose, the present invention provides a device for recycling condensed water in titanium dioxide production, comprising a high-pressure superheated steam pulverizer, wherein the output end of the high-pressure superheated steam pulverizer is connected to a bag filter, the bag filter is connected to a powder discharge pipe and a steam discharge pipe, the end of the steam discharge pipe is connected to a condensation mechanism, the condensation mechanism comprises a condensation tank, a collecting box arranged below the condensation tank, and a plurality of pairs of convex covers fixed on the outer surface of the condensation tank, a plurality of condensation pipes are arranged between each pair of the convex covers, a fan is also installed on the convex cover, a filter is arranged at a side position of the collecting box, a filter press washing water tank is arranged at a side position of the filter, and a plurality of centrifugal pumps are connected between the filter and the filter press washing water tank.

[0008] In the technical solution of the present invention, the end of the steam exhaust pipe passes through the top of the condensation tank and extends into the condensation tank. A plurality of openings are opened on the outer surface of the condensation tank. The openings penetrate the condensation tank horizontally. A pair of convex covers are respectively covered at the first and second ends of the openings and fixedly connected to the condensation tank.

[0009] In the technical solution of the present invention, the bottom end of the condensation tank is open, and a drainage bucket is fixed to the bottom end of the condensation tank. The drainage bucket is located directly above the collection box, and the bottom end of the drainage bucket extends into the collection box.

[0010] In the technical solution of the present invention, a support frame is fixed to the bottom of the condensation tank, and the support frame is fixed to the top of the bottom plate.

[0011] In the technical solution of the present invention, a water outlet pipe is connected to the bottom end of the collecting box, a liquid level controller is installed on the outer surface of the collecting box, liquid level sensors are installed at the top and bottom positions of the outer surface of the collecting box, and the ends of the liquid level sensors penetrate the collecting box and extend into the collecting box.

[0012] In the technical solution of the present invention, a plurality of through holes are opened on the outer surface of the convex cover, the condenser is sleeved in the through holes and fixedly connected to the convex cover, a plurality of fins are fixed on the outer surface of the condenser, and in a pair of the convex covers, a convex frame is provided on the outer surface of one of the convex covers, and the fan is installed on the outer end of the convex frame.

[0013] In the technical solution of the present invention, the filter includes a tank body and a filter element filled in the tank body, a pair of convex tubes are connected to the outer surface of the tank body, a top cover is threadedly connected to the top of the tank body, and one of the convex tubes is connected to the water outlet pipe.

[0014] In the technical solution of the present invention, the input end of the centrifugal pump is connected to a liquid inlet pipe, the liquid outlet end of the centrifugal pump is connected to a liquid discharge pipe, the liquid inlet pipe is connected to another convex pipe on the filter, and the end of the liquid discharge pipe extends into the filter press wash water tank.

[0015] In the technical solution of the present invention, a flow meter and a regulating valve are installed on the liquid discharge pipe.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0017] 1. In the present invention, a condensing mechanism is provided, and the separated steam is passed into the condensing mechanism, so that the steam comes into contact with the condensing tube after entering the interior of the condensing tank, so that the steam can condense on the surface of the condensing tube, and the condensed water flows downward into the collecting box to be collected, thereby achieving the purpose of collecting the steam and enabling the condensed water to be collected and reused.

[0018] 2. In the present invention, a collecting box and a filter press washing water tank are set up and a centrifugal pump is connected between the collecting box and the filter press washing water tank, so that under the action of the liquid level sensor and the liquid level controller on the collecting box, the condensed water in the collecting box can be automatically pumped into the filter press washing water tank by the centrifugal pump after it is full, thereby preventing the condensed water in the collecting box from overflowing during collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a structural diagram of the condensation mechanism in the present invention;

[0021] Figure 3 It is the structural diagram of the condensation tank in the present invention;

[0022] Figure 4 It is a structural diagram of the collection box in the present invention;

[0023] Figure 5 is an exploded view of the convex cover in the present invention;

[0024] Figure 6 It is a structural diagram of the condenser in the present invention;

[0025] Figure 7 An exploded view of the filter of the present invention;

[0026] Figure 8 It is a structural diagram of the liquid discharge pipe in the present invention;

[0027] Fig. 9 This is a flow chart of the pumping of condensed water in the present invention.

[0028] Description of reference numerals:

[0029] 1- High-pressure superheated steam pulverizer;

[0030] 2-bag filter; 21-powder discharge pipe; 22-steam discharge pipe;

[0031] 3-condensing mechanism; 31-condensing tank; 311-through port; 312-draining bucket; 313-support frame; 314-bottom plate; 32-collecting box; 321-water outlet pipe; 322-liquid level controller; 323-liquid level sensor; 33-convex cover; 331-through hole; 332-condensing pipe; 3321-fin; 333-convex frame; 334-fan;

[0032] 4-filter; 41-tank body; 411-convex pipe; 412-top cover; 42-filter element;

[0033] 5-Filter press washing water tank;

[0034] 6- centrifugal pump; 61- liquid inlet pipe; 62- liquid discharge pipe; 621- flow meter; 622- regulating valve. DETAILED DESCRIPTION

[0035] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0036] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0037] Reference Figure 1-Figure 9 The condensed water recycling device in titanium dioxide production of the present invention comprises a high-pressure superheated steam pulverizer 1, the output end of the high-pressure superheated steam pulverizer 1 is connected to a bag filter 2, and the bag filter 2 is connected to a powder discharge pipe 21 and a steam discharge pipe 22. By respectively introducing titanium dioxide particles and high-pressure steam into the high-pressure superheated steam pulverizer 1, the titanium dioxide particles can be crushed under the action of the airflow, and the crushed titanium dioxide and steam are separated by the bag filter 2 after being introduced into the bag filter 2, so that the titanium dioxide is discharged from the powder discharge pipe 21, and the steam is discharged from the steam discharge pipe 22.

[0038] In the present invention, the end of the steam discharge pipe 22 is connected to a condensing mechanism 3, which includes a condensing tank 31, a collecting box 32 arranged below the condensing tank 31, and a plurality of pairs of convex covers 33 fixed on the outer surface of the condensing tank 31. The end of the steam discharge pipe 22 passes through the top of the condensing tank 31 and extends into the condensing tank 31, so that the steam can enter the interior of the condensing tank 31 through the steam discharge pipe 22. A plurality of through openings 311 are provided on the outer surface of the condensing tank 31, and the through openings 311 pass through the condensing tank 31 horizontally. A pair of convex covers 33 are respectively covered at the head and end of the through openings 311 and fixedly connected to the condensing tank 31, so that the head and end of the through openings 311 are both closed by the convex covers 33, so as to prevent the steam in the condensing tank 31 from overflowing from the through openings 311.

[0039] Specifically, a plurality of condensing tubes 332 are arranged between each pair of convex covers 33, and a fan 334 is also installed on the convex covers 33. A plurality of through holes 331 are provided on the outer surface of the convex covers 33, and the condensing tubes 332 are sleeved in the through holes 331 and fixedly connected to the convex covers 33, so that the plurality of condensing tubes 332 all pass through the interior of the condensing tank 31, and a plurality of fins 3321 are fixed on the outer surface of the condensing tubes 332, and the fins 3321 increase the heat absorption area of ​​the condensing tubes 332, so that the steam will condense after passing into the condensing tank 31 and contacting with the fins 3321 and the condensing tubes 332, so that the water vapor will condense into liquid water. In a pair of convex covers 33, a convex frame 333 is provided on the outer surface of one of the convex covers 33, and a fan 334 is installed at the outer end of the convex frame 333. When the fan 334 is connected to an external power source, the fan 334 starts to work, so that the fan 334 blows the outside air into the convex frame 333, and then the air enters the condenser 332 and is discharged outward from the end of the condenser 332. The flowing air will take away the heat on the condenser 332 and the fin 3321, and reduce the temperature of the condenser 332 and the fin 3321, so that the steam can always condense on the condenser 332 and the fin 3321, thereby preventing the condenser 332 and the fin 3321 from absorbing the heat in the steam and causing the temperature to rise, making it difficult for the steam to condense.

[0040] Furthermore, the bottom end of the condensation tank 31 is open, and a drain bucket 312 is fixed to the bottom end of the condensation tank 31. The drain bucket 312 is located directly above the collecting box 32, and the bottom end of the drain bucket 312 extends into the collecting box 32. A support frame 313 is fixed to the bottom of the condensation tank 31, and the support frame 313 is fixed to the top of the bottom plate 314. The collecting box 32 is fixed to the top of the bottom plate 314, so that liquid water formed after the steam is condensed by the fan 334 and the fins 3321 can flow downward along the drain bucket 312 into the collecting box 32 when dripping downward, thereby achieving the purpose of collecting condensed water so that the condensed water can be reused in the production process of titanium dioxide.

[0041] In the above scheme, a filter 4 is arranged at the side of the collection box 32, a filter press water tank 5 is arranged at the side of the filter 4, and a plurality of centrifugal pumps 6 are connected between the filter 4 and the filter press water tank 5. The bottom end of the collection box 32 is connected with a water outlet pipe 321, the filter 4 includes a tank body 41 and a filter element 42 filled in the tank body 41, a pair of convex pipes 411 are connected to the outer surface of the tank body 41, a top cover 412 is threadedly connected to the top of the tank body 41, one of the convex pipes 411 is connected to the water outlet pipe 321, the input end of the centrifugal pump 6 is connected to a liquid inlet pipe 61, the liquid outlet end of the centrifugal pump 6 is connected to a liquid discharge pipe 62, the liquid inlet pipe 61 is connected to the other convex pipe 411 on the filter 4. 11 is connected, and the end of the drain pipe 62 extends into the filter press washing water tank 5, so that the outlet pipe 321, the filter 4, the liquid inlet pipe 61, the centrifugal pump 6 and the drain pipe 62 are connected in sequence. When the centrifugal pump 6 is connected to the external power supply, the centrifugal pump 6 starts to work, so that the condensed water collected in the collection box 32 is pumped by the centrifugal pump 6 and then filtered by the filter 4 and discharged into the filter press washing water tank 5, so that the filtered water can be reused in the production of titanium dioxide.

[0042] Specifically, a liquid level controller 322 is installed on the outer surface of the collecting box 32, and liquid level sensors 323 are installed at the top and bottom positions of the outer surface of the collecting box 32. The ends of the liquid level sensors 323 penetrate the collecting box 32 and extend into the collecting box 32. The liquid level sensor 323 located at the top corresponds to the highest water level in the collecting box 32, and the liquid level sensor 323 located at the bottom corresponds to the lowest water level in the collecting box 32. The liquid level controller 322 is connected to the centrifugal pump 6. When the condensed water level in the collecting box 32 contacts the liquid level sensor 323 located at the top, the liquid level controller 322 controls the centrifugal pump 6 to work, so that the condensed water is continuously pumped into the filter press washing water tank 5. When the water level drops and the liquid level is lower than the liquid level sensor 323 located at the bottom, the liquid level controller 322 controls the centrifugal pump 6 to stop working, so that the liquid level controller 322 can control the centrifugal pump 6 to work automatically under the induction of the liquid level sensor 323, so as to prevent the condensed water in the collecting box 32 from overflowing.

[0043] Furthermore, there are two centrifugal pumps 6, one of which is used for normal operation and the other is used for standby, so as to prevent the situation where the single centrifugal pump 6 fails and cannot continue to pump the condensed water. A flow meter 621 and a regulating valve 622 are installed on the drain pipe 62, and the flow rate of the condensed water discharged from the drain pipe 62 can be controlled by controlling the regulating valve 622 and referring to the flow value of the flow meter 621.

[0044] In addition, in the specific application after the condensed water is pumped to the filter press washing water tank 5, the filter press washing water tank 5 is mainly used for the filter press water washing process. The filter press water system process is used for solid-liquid separation and washing soluble salts. The process of washing soluble salts requires a large amount of hot desalted water. The traditional process uses steam to heat the desalted water, which takes a long time to heat up and uses a large amount of water. Therefore, the condensed water is passed into the filter press washing water tank 5 and can be used for washing in the filter press water washing process, thereby realizing the reuse of condensed water, reducing water resource waste and environmental protection problems, and achieving the function of reducing costs and emissions.

[0045] The working principle of the condensed water recycling device in titanium dioxide production of the present invention is specifically as follows:

[0046] First, as the titanium dioxide particles are crushed by the air flow in the high-pressure superheated steam crusher 1, the crushed titanium dioxide and steam are separated by the bag filter 2 after passing into the bag filter 2, so that the titanium dioxide is discharged from the powder discharge pipe 21, and the steam is discharged from the steam discharge pipe 22. Then, when the steam enters the condenser 31 through the steam discharge pipe 22 and contacts the condenser 332 and the fin 3321, at this time, due to the continuous operation of the fan 334, the surface temperature of the condenser 332 and the fin 3321 will be lower than the temperature of the steam, so that the steam can condense on the condenser 332 and the fin 3321, and the liquid water formed after condensation drips downward into the collection box 32, so that the collection box 32 collects the condensed water. The condensed water is collected so as to be reused. Finally, when the water level in the collecting box 32 contacts the liquid level sensor 323 at the top, the liquid level controller 322 controls the centrifugal pump 6 to work, so that the condensed water is continuously pumped into the filter press washing water tank 5. When the water level drops and the liquid surface is lower than the liquid level sensor 323 at the bottom, the liquid level controller 322 controls the centrifugal pump 6 to stop working. The liquid level controller 322 can control the centrifugal pump 6 to work automatically under the induction of the liquid level sensor 323 to prevent the condensed water in the collecting box 32 from overflowing. The condensed water pumped into the filter press washing water tank 5 by the centrifugal pump 6 can be used in the filter press washing process, thereby achieving the purpose of reusing the condensed water.

[0047] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. A device for recycling condensed water in titanium dioxide production, comprising a high-pressure superheated steam pulverizer (1), the output end of the high-pressure superheated steam pulverizer (1) being connected to a bag filter (2), the bag filter (2) being connected to a powder discharge pipe (21) and a steam discharge pipe (22), characterized in that: The end of the steam discharge pipe (22) is connected to a condensing mechanism (3), the condensing mechanism (3) comprising a condensing tank (31), a collecting box (32) arranged below the condensing tank (31), and a plurality of pairs of convex covers (33) fixed on the outer surface of the condensing tank (31), a plurality of condensing pipes (332) being arranged between each pair of the convex covers (33), a fan (334) being also installed on the convex covers (33), a filter (4) being arranged at a side position of the collecting box (32), a filter press washing water tank (5) being arranged at a side position of the filter (4), and a plurality of centrifugal pumps (6) being connected between the filter (4) and the filter press washing water tank (5); The end of the steam discharge pipe (22) passes through the top of the condensation tank (31) and extends into the condensation tank (31); a plurality of openings (311) are provided on the outer surface of the condensation tank (31); the openings (311) pass through the condensation tank (31) transversely; a pair of convex covers (33) are respectively covered at the first and second ends of the openings (311) and are fixedly connected to the condensation tank (31); The bottom end of the condensation tank (31) is open, and a drainage hopper (312) is fixed to the bottom end of the condensation tank (31). The drainage hopper (312) is located directly above the collection box (32), and the bottom end of the drainage hopper (312) extends into the collection box (32); A support frame (313) is fixed to the bottom of the condensation tank (31), and the support frame (313) is fixed to the top of the bottom plate (314); The bottom end of the collection box (32) is connected to a water outlet pipe (321), a liquid level controller (322) is installed on the outer surface of the collection box (32), and liquid level sensors (323) are installed at the top and bottom positions of the outer surface of the collection box (32), and the end of the liquid level sensor (323) passes through the collection box (32) and extends into the collection box (32); The outer surface of the convex cover (33) is provided with a plurality of through holes (331); the condenser tube (332) is sleeved in the through holes (331) and fixedly connected to the convex cover (33); a plurality of fins (3321) are fixed on the outer surface of the condenser tube (332); in a pair of the convex covers (33), a convex frame (333) is provided on the outer surface of one of the convex covers (33); and the fan (334) is mounted on the outer end of the convex frame (333); The filter (4) comprises a tank body (41) and a filter element (42) filled in the tank body (41); a pair of convex tubes (411) are connected to the outer surface of the tank body (41); a top cover (412) is threadedly connected to the top of the tank body (41); one of the convex tubes (411) is connected to a water outlet pipe (321); The input end of the centrifugal pump (6) is connected to a liquid inlet pipe (61), the liquid outlet end of the centrifugal pump (6) is connected to a liquid discharge pipe (62), the liquid inlet pipe (61) is connected to another convex pipe (411) on the filter (4), and the end of the liquid discharge pipe (62) extends into the filter press wash water tank (5); A flow meter (621) and a regulating valve (622) are installed on the liquid discharge pipe (62).

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