Alkali liquor temperature raising device
By exchanging heat between the waste heat of the fresh steam condensate and the alkaline solution, the problem of scale formation caused by the decomposition of sodium aluminate solution is solved, the efficiency of alkaline solution heating and equipment stability are improved, and scale formation and alkaline solution waste are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-03-27
AI Technical Summary
In existing technologies, sodium aluminate solutions are prone to decomposition and scaling after heat exchange, leading to scaling on the inner wall of the pipe, reducing heat exchange efficiency and affecting the stable operation of the equipment.
The waste heat from the condensate of fresh steam is used to raise the temperature of the alkaline solution. Heat exchange is carried out using an inner and outer heat exchanger structure, avoiding the use of sodium aluminate solution. Combined with a filtration and precipitation system, impurities are reduced, improving the heating efficiency of the alkaline solution and the stability of the equipment.
It improved the scaling problem in the pipeline, increased the heating efficiency of the alkali solution, reduced scaling in the equipment, ensured the stable operation of the heat exchange equipment, and reduced alkali waste.
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Figure CN224051115U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The alkali liquor temperature raising device belongs to the technical field of heat exchange devices. BACKGROUND
[0002] In the process of producing alumina by Bayer method, a kind of hard solid substance, scab, is easily generated on the surface of production device. The scab on the surface of the device will reduce the heat transfer coefficient of the heat exchange device, reduce the effective volume of the device, reduce the production capacity of the device, and affect the stable operation of the device. The scab in the process pipeline will reduce the cross-sectional area of the pipeline and reduce the conveying capacity of the pipeline. The scab on the instrument will make the measurement data inaccurate. Therefore, the scab causes great harm to production, and cleaning the scab is particularly important.
[0003] At present, the chemical cleaning method is used to eliminate the scab of the workshop sedimentation tank. The alkali liquor is boiled with alkali to achieve the purpose of removing the scab. In actual application, in order to avoid the consumption of new steam, the waste heat of sodium aluminate solution is often used to heat and raise the temperature of the alkali liquor. Although this method can achieve the purpose of temperature raising, the sodium aluminate solution is easy to decompose after heat exchange, and the scab mainly composed of Al(OH)3 is generated and adhered to the inner wall of the pipeline, which greatly reduces the heat exchange efficiency and affects the stable operation of the heat exchange equipment. CONTENT OF THE INVENTION
[0004] In order to solve the problems in the background art, the alkali liquor temperature raising device is provided. The waste heat of new steam condensate water is used to raise the temperature of the alkali liquor, the problem of scab on the inner wall of the pipeline is improved, the temperature raising efficiency of the alkali liquor is improved, and the stable operation of the heat exchange equipment is ensured.
[0005] The alkali liquor temperature raising device comprises a new steam condensate water pipeline, a heat exchange temperature raising assembly is arranged on one side of the new steam condensate water pipeline, the heat exchange temperature raising assembly comprises a heat exchange outer sleeve and a heat exchange inner sleeve, alkali liquor is conveyed in the heat exchange inner sleeve, the heat exchange inner sleeve is arranged in the inside of the heat exchange outer sleeve, the heat exchange inner sleeve and the heat exchange outer sleeve are independent and not communicated with each other, a water inlet pipeline and a water outlet pipeline are connected to the new steam condensate water pipeline, one end of the water inlet pipeline away from the new steam condensate water pipeline is connected to one end of the heat exchange outer sleeve, the other end of the water outlet pipeline away from the new steam condensate water pipeline is connected to the other end of the heat exchange outer sleeve, and first control valves are installed on the water inlet pipeline and the water outlet pipeline.
[0006] Further, a second control valve is installed on the new steam condensate water pipeline, and the second control valve is located between the water inlet pipeline and the water outlet pipeline.
[0007] Further, the two ends of the heat exchange inner sleeve pipe are provided with third control valves, and a discharging pipeline is connected to the heat exchange inner sleeve pipe and located between the two third control valves, and a discharging valve is arranged on the discharging pipeline.
[0008] Further, an end of the discharging pipeline away from the heat exchange inner sleeve pipe is connected with a temporary storage tank, the bottom of the temporary storage tank is connected with a returning pipeline, an end of the returning pipeline away from the temporary storage tank is connected with the heat exchange inner sleeve pipe, and a water pump is arranged on the returning pipeline.
[0009] Further, a filter screen is arranged in the returning pipeline and located between the temporary storage tank and the water pump.
[0010] Further, the filter screen is fixedly connected to a dismounting plate, a dismounting groove is formed in the returning pipeline, the dismounting plate is inserted into the dismounting groove, and a sealing gasket is arranged between the dismounting plate and the returning pipeline.
[0011] Further, an end of the heat exchange outer sleeve pipe is connected with a water discharging pipeline, and a water discharging valve is arranged on the water discharging pipeline.
[0012] Further, the heat exchange outer sleeve pipe is wrapped with a heat preservation layer.
[0013] Compared with the prior art, the heat exchange device has the following beneficial effects:
[0014] (1) The new steam in the previous process is used for heat exchange to form new steam condensate water, and when the new steam condensate water is used for temperature raising of the alkali liquor, the two first control valves are opened, the new steam condensate water is branched, a part of the new steam condensate water directly flows to the next process through the new steam condensate water pipeline, and the other part of the new steam condensate water enters the heat exchange outer sleeve pipe through the water inlet pipeline, the new steam condensate water in the heat exchange outer sleeve pipe is used for heat exchange with the alkali liquor in the heat exchange inner sleeve pipe, so that the alkali liquor is raised in temperature, and then the heat exchanged new steam condensate water returns to the new steam condensate water pipeline through the water outlet pipeline and enters the next process, the new steam condensate water is used to replace the sodium aluminate solution for heating, the waste heat of the new steam condensate water is used for temperature raising of the alkali liquor, the problem of scabbing on the inner wall of the pipeline is solved, the temperature raising efficiency of the alkali liquor is improved, and the stable operation of the heat exchange equipment is ensured.
[0015] (2) When the first control valve is opened, the second control valve can be closed, so that the new steam condensate water is used for temperature raising of the alkali liquor through the heat exchange temperature raising assembly, and the temperature raising efficiency of the alkali liquor is further improved.
[0016] (3) The alkali liquor in the heat exchange inner sleeve pipe is discharged through the discharging pipeline and then enters the temporary storage tank, the alkali liquor can be precipitated in the temporary storage tank to filter part of impurities, after the maintenance work is completed, the alkali liquor in the temporary storage tank is re-conveyed to the heat exchange inner sleeve pipe through the water pump and the returning pipeline, the alkali liquor is used again, and the waste of the alkali liquor is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0018] Figure 1 It is a whole structure schematic diagram of a lye warming device;
[0019] Figure 2 It is a sectional view of a heat exchange warming assembly;
[0020] Figure 3 It is a mounting structure schematic diagram of a filter screen;
[0021] The figure mark explanation: 1, new steam condensate water pipeline; 2, heat exchange warming assembly; 20, heat exchange outer sleeve pipe; 21, heat exchange inner sleeve pipe; 3, water inlet pipeline; 4, water outlet pipeline; 5, first control valve; 6, second control valve; 7, third control valve; 8, discharge pipeline; 80, discharge valve; 9, temporary storage pool; 90, back material pipe; 91, water pump; 92, back material valve; 93, filter screen; 94, dismounting plate; 95, dismounting groove; 10, water discharge pipeline; 100, water discharge valve; 11, heat preservation layer. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.
[0023] The drawings in the present application will be described below in combination with the embodiments of the present application. Figure 1 to the drawings Figure 3 The present application will be described in detail in combination with specific embodiments.
[0024] Reference Figures 1-3The utility model provides a kind of lye temperature raising device, including new steam condensate water pipeline 1, the one side of new steam condensate water pipeline 1 is provided with heat exchange temperature raising assembly 2, heat exchange temperature raising assembly 2 includes heat exchange outer sleeve 20 and heat exchange inner sleeve 21, heat exchange inner sleeve 21 is conveyed with lye, heat exchange inner sleeve 21 is arranged in the inside of heat exchange outer sleeve 20, heat exchange inner sleeve 21 and heat exchange outer sleeve 20 are independent and not intercommunicate each other, water inlet pipeline 3 and water outlet pipeline 4 are connected on new steam condensate water pipeline 1, the end of water inlet pipeline 3 away from new steam condensate water pipeline 1 is connected with the one end of heat exchange outer sleeve 20, the end of water outlet pipeline 4 away from new steam condensate water pipeline 1 is connected with the other end of heat exchange outer sleeve 20, first control valve 5 is installed on water inlet pipeline 3 and water outlet pipeline 4.
[0025] New steam is used in the previous process to form new steam condensate water, and the new steam condensate water flows in the new steam condensate water pipeline 1. When the lye is heated, two first control valves 5 are opened, and the new steam condensate water is divided into two parts. One part directly flows to the next process through the new steam condensate water pipeline 1, and the other part enters the heat exchange outer sleeve 20 through the water inlet pipeline 3. The new steam condensate water in the heat exchange outer sleeve 20 exchanges heat with the lye in the heat exchange inner sleeve 21, thereby heating the lye. Subsequently, the heat-exchanged new steam condensate water returns to the new steam condensate water pipeline 1 through the water outlet pipeline 4 and enters the next process. The utility model uses new steam condensate water to replace the heating method of sodium aluminate solution, uses the waste heat of new steam condensate water to heat the lye, improves the problem of scarring on the inner wall of the pipeline, improves the heating efficiency of the lye, and ensures the stable operation of the heat exchange equipment.
[0026] A second control valve 6 is installed on the new steam condensate water pipeline 1, and the second control valve 6 is located between the water inlet pipeline 3 and the water outlet pipeline 4. When the first control valve 5 is opened, the second control valve 6 can be closed, so that the new steam condensate water is heated for the lye through the heat exchange temperature raising assembly 2, thereby further improving the heating efficiency of the lye.
[0027] Third control valves 7 are installed on both ends of the heat exchange inner sleeve 21, a discharge pipeline 8 is connected to the heat exchange inner sleeve 21, and the discharge pipeline 8 is located between the two third control valves 7. A discharge valve 80 is installed on the discharge pipeline 8. When the heat exchange inner sleeve 21 is maintained, the two third control valves 7 are closed, and the discharge valve 80 is opened to discharge the lye in the heat exchange inner sleeve 21, thereby facilitating the maintenance work.
[0028] The alkali solution in the heat exchange inner sleeve pipe 21 is discharged through the discharging pipe 8 and enters the temporary storage pool 9, and the alkali solution can be precipitated in the temporary storage pool 9 to filter part of impurities; after the maintenance work is completed, the alkali solution in the temporary storage pool 9 is re-transported to the heat exchange inner sleeve pipe 21 through the water pump 91 and the return pipe 90, and the alkali solution is used again, thereby reducing the waste of the alkali solution.
[0029] The return pipe 90 is provided with a filter screen 93, and the filter screen 93 is located between the temporary storage pool 9 and the water pump 91. The filter screen 93 can block the impurities from entering the heat exchange inner sleeve pipe 21 with the alkali solution and prevent the impurities from entering the water pump 91 to damage the water pump 91.
[0030] The filter screen 93 is fixedly connected to a dismounting plate 94, the return pipe 90 is provided with a dismounting groove 95, the dismounting plate 94 is inserted into the dismounting groove 95, and a sealing gasket is arranged between the dismounting plate 94 and the return pipe 90. The filter screen 93 is mounted on the return pipe 90 through the dismounting plate 94, so that the filter screen 93 is convenient to clean, and the sealing gasket can seal the gap between the dismounting plate 94 and the return pipe 90 to prevent the alkali solution from leaking out.
[0031] One end of the heat exchange outer sleeve pipe 20 is connected to a water discharging pipe 10, and the water discharging pipe 10 is provided with a water discharging valve 100. The water discharging pipe 10 and the water discharging valve 100 are convenient to discharge the new steam condensate water in the heat exchange outer sleeve pipe 20 and facilitate the maintenance work.
[0032] The heat exchange outer sleeve pipe 20 is wrapped with a heat preservation layer 11, and the heat preservation layer 11 can reduce the heat loss of the new steam condensate water in the heat exchange outer sleeve pipe 20.
[0033] The above further describes the utility model by means of specific embodiments, but it should be understood that the specific description herein should not be understood as the limitation on the essence and scope of the utility model, and various modifications made to the above embodiments by the ordinary skilled in the art after reading the specification all belong to the scope protected by the utility model.
Claims
1. A liquor warming device, characterized by, The new steam condensate water pipeline is provided with a heat exchange temperature raising assembly on one side, the heat exchange temperature raising assembly comprises a heat exchange outer sleeve and a heat exchange inner sleeve, the heat exchange inner sleeve is used for conveying lye, the heat exchange inner sleeve is arranged in the heat exchange outer sleeve, the heat exchange inner sleeve and the heat exchange outer sleeve are independent and not communicated with each other, the new steam condensate water pipeline is connected with a water inlet pipeline and a water outlet pipeline, one end of the water inlet pipeline away from the new steam condensate water pipeline is connected with one end of the heat exchange outer sleeve, and the other end of the water outlet pipeline away from the new steam condensate water pipeline is connected with the other end of the heat exchange outer sleeve, and the water inlet pipeline and the water outlet pipeline are both provided with a first control valve.
2. The alkali liquid warming device of claim 1, wherein The new steam condensate water pipeline is provided with a second control valve between the water inlet pipeline and the water outlet pipeline.
3. The alkali liquid warming device of claim 1, wherein Both ends of the heat exchange inner sleeve are provided with a third control valve, the heat exchange inner sleeve is connected with a discharge pipeline, the discharge pipeline is located between the two third control valves, and the discharge pipeline is provided with a discharge valve.
4. The alkali liquid warming device of claim 3, wherein One end of the discharge pipeline away from the heat exchange inner sleeve is connected with a temporary storage tank, the bottom of the temporary storage tank is connected with a return pipeline, one end of the return pipeline away from the temporary storage tank is connected with the heat exchange inner sleeve, and the return pipeline is provided with a water pump.
5. The alkali liquid warming device of claim 4, wherein, The return pipeline is provided with a filter screen between the temporary storage tank and the water pump.
6. The alkali liquid warming device of claim 5, wherein, The filter screen is fixedly connected with a dismounting plate, the return pipeline is provided with a dismounting groove, the dismounting plate is inserted into the dismounting groove, and a sealing gasket is arranged between the dismounting plate and the return pipeline.
7. The alkali liquid warming device of claim 1, wherein One end of the heat exchange outer sleeve is connected with a water discharge pipeline, and the water discharge pipeline is provided with a water discharge valve.
8. The alkali liquid warming device of claim 1, wherein, The heat exchange outer sleeve is wrapped with an insulation layer.