Washing water system with high-precision filter
By introducing high-precision filters and process water bypass design into the process water system, the problem of heater scaling caused by suspended solid particles was solved, and efficient interception of suspended particles was achieved, which improved the heat exchange efficiency and filter cake washing effect and reduced maintenance costs.
Patent Information
- Application Number
- CN202422688443.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-05
AI Technical Summary
In the prior art, suspended solid particles in process water cause scaling of heaters, which reduces heat exchange efficiency, makes cleaning difficult and increases maintenance costs, and affects product quality.
A high-precision filter (1μm pore size) is used to intercept suspended solid particles. Combined with process water bypass and valve design, this ensures continuous system operation and facilitates efficient cleaning.
It effectively reduces the risk of heater scaling, improves heat exchange efficiency, extends cleaning cycles, enhances filter cake washing effects and product quality, and reduces maintenance costs.
Smart Images
Figure CN223351160U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of terephthalic acid production, in particular to a washing water system with a high-precision filter. Background Art
[0002] During terephthalic acid production, the reaction products undergo cooling and separation. To remove unreacted raw materials and by-products, the terephthalic acid is typically purified through filtration and other methods. The filter cake after filtration requires washing. The rinse water heater is a four-pass shell-and-tube heat exchanger, with process water flowing through the shell side and condensate from the PTA crystallizer preheater through the tube side. Both the shell and tube sides are constructed of 304L stainless steel. The process water is primarily used for rinsing the filter cake. Before rinsing, the process water heater raises the water temperature to 155°C. The water used originates from the oxidation process water pump, has a temperature of approximately 112°C, and contains a large amount of suspended solids and other impurities. These particles easily form scale on the heater tube walls, reducing heat transfer efficiency and impacting overall system efficiency. Over time, the heater requires cleaning, but its complex structure makes the cleaning process difficult, which undoubtedly increases maintenance costs. Furthermore, the low purity of the process water impairs the filter cake washing process, which in turn affects product quality. Utility Model Content
[0003] The purpose of the present utility model is to solve at least one of the technical problems existing in the prior art and to provide a washing water system with a high-precision filter. The high-precision filter can efficiently intercept suspended solid particles in process water, reduce the risk of heater scaling, and thus improve heat exchange efficiency. The cleaning cycle of the heater can be extended, and maintenance costs can be reduced. The purified process water after filtration has a high purity, and the filter cake washing effect is significantly improved. In addition, the high-precision filter has a simple structure, is easy to operate, and is easy to clean, meeting the actual needs of industrial production.
[0004] The utility model also provides a washing water system with the above-mentioned high-precision filter, comprising: an oxidation process pump, the output end of the oxidation process pump is fixedly connected to pipe one, one end of the pipe one is fixedly connected to the high-precision filter, the outer surface of the high-precision filter is fixedly connected to pipe two, one end of the pipe two is fixedly connected to a washing water heater, the outer surface of the washing water heater is fixedly connected to pipe three, and one end of the pipe three is fixedly connected to a filter.
[0005] According to the washing water system with a high-precision filter described in the utility model, a process water bypass is fixedly connected to the outer surface of pipe one, and one end of the process water bypass is fixedly connected to pipe two. When the high-precision filter is cleaned, the process water bypass is utilized to ensure that the water flow is not interrupted, thereby improving the reliability and continuous working efficiency of the system.
[0006] According to the utility model, a washing water system with a high-precision filter is provided. A valve is installed on the outer surface of the process water bypass. The filter mesh of the high-precision filter has a pore size of 1 μm. The valve installed on the outer surface of the process water bypass allows the operator to conveniently control the bypass flow at any time. It can be quickly opened and closed when needed, achieving the effect of easy maintenance and flexible operation. The filter mesh pore size of approximately 1 μm can effectively intercept tiny suspended solid particles and other impurities, significantly reducing the scaling rate of the heater and improving heat exchange efficiency.
[0007] Beneficial effects
[0008] 1. Compared with the existing technology, this washing water system with a high-precision filter can efficiently intercept suspended solid particles in the process water through the high-precision filter, reduce the risk of heater scaling, and thus improve heat exchange efficiency. The cleaning cycle of the heater can be extended and maintenance costs can be reduced.
[0009] 2. Compared with the existing technology, this washing water system with a high-precision filter has a higher purity of filtered process water and a significantly improved filter cake washing effect. In addition, the high-precision filter has a simple structure, is easy to operate and easy to clean, meeting the actual needs of industrial production. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The present invention is further described below with reference to the accompanying drawings and embodiments:
[0011] Figure 1 This is the overall structural diagram of the washing water system with a high-precision filter of the utility model.
[0012] Legend:
[0013] 1. High-precision filter; 2. Oxidation process pump; 3. Wash water heater; 4. Filter; 5. Process water bypass; 6. Pipeline 1; 7. Pipeline 2; 8. Pipeline 3. DETAILED DESCRIPTION
[0014] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.
[0015] Reference Figure 1 , an embodiment of the present invention is a washing water system with a high-precision filter, which includes: an oxidation process pump 2, which supplies process water at a temperature of about 112°C and is introduced into the inlet of the high-precision filter 1; the output end of the oxidation process pump 2 is fixedly connected with a pipe 1 6, which connects the oxidation process pump 2 and the high-precision filter 1; one end of the pipe 1 6 is fixedly connected with the high-precision filter 1, which intercepts suspended solid particles through a filter screen with a pore size of 1 μm; the outer surface of the high-precision filter 1 is fixedly connected with a pipe 2 7, which connects the high-precision filter 1 and the washing water heater 3; one end of the pipe 2 7 is fixedly connected with the washing water heater 3, which heats the process water to 155°C to meet the temperature requirements for filter cake flushing; the outer surface of the washing water heater 3 is fixedly connected with a pipe 3 8, which connects the washing water heater 3 and the filter 4; one end of the pipe 3 8 is fixedly connected with the filter 4, which is used for filtering in the production process of terephthalic acid and has a filter cake inside.
[0016] The outer surface of pipe 1 6 is fixedly connected to a process water bypass 5 to avoid water flow interruption when the high-precision filter 1 is cleaned. One end of the process water bypass 5 is fixedly connected to pipe 2 7. A valve is installed on the outer surface of the process water bypass 5. The filter mesh pore size of the high-precision filter 1 is 1 μm.
[0017] Working principle: First, process water at about 112°C supplied from the oxidation process pump 2 is introduced into the inlet of the high-precision filter 1. When the process water passes through the high-precision filter 1, the suspended solid particles are intercepted by the filter screen, and the filtered process water is introduced into the shell side of the washing water heater 3. Since the suspended solid particles have been effectively removed, the scaling rate of the pipe wall of the washing water heater 3 is greatly reduced, and the heat exchange efficiency is improved. The heated process water is introduced into the filter 4 for washing the filter cake. Due to the high purity of the process water, the filter cake washing effect is significantly improved, thereby ensuring product quality. Throughout the entire process, sensors and control systems installed at various key positions are used to monitor the temperature, pressure, flow and other parameters of the process water in real time to ensure the stable operation of the process.
[0018] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.
Claims
1. A washing water system with a high-precision filter, characterized in that: include: An oxidation process pump (2), wherein the output end of the oxidation process pump (2) is fixedly connected to a pipe 1 (6), one end of the pipe 1 (6) is fixedly connected to a high-precision filter (1), the outer surface of the high-precision filter (1) is fixedly connected to a pipe 2 (7), one end of the pipe 2 (7) is fixedly connected to a washing water heater (3), the outer surface of the washing water heater (3) is fixedly connected to a pipe 3 (8), and one end of the pipe 3 (8) is fixedly connected to a filter (4).
2. A washing water system with a high-precision filter according to claim 1, characterized in that: The outer surface of the pipe 1 (6) is fixedly connected with a process water bypass (5), and one end of the process water bypass (5) is fixedly connected to the pipe 2 (7).
3. A washing water system with a high-precision filter according to claim 2, characterized in that: A valve is installed on the outer surface of the process water bypass (5), and the filter mesh pore size of the high-precision filter (1) is 1 μm.