Online backwashing device for heat exchange cooler
By installing an online backwashing device on the heat exchanger cooler, and using the backwashing water inlet pipeline and backwashing water outlet pipeline for regular cleaning, the downtime caused by heat exchanger scale is solved, extending the running time and improving system stability.
Patent Information
- Application Number
- CN202421937818.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-08-12
AI Technical Summary
The prior art requires shutdown for chemical cleaning or high-pressure physical cleaning when dealing with heat exchanger scale, resulting in reduced device operation time, capacity impact and labor costs.
An online backflushing device for heat exchange coolers is designed. By adding backflushing water inlet and backflushing water outlet pipelines to the heat exchanger, regular online backflushing is achieved to reduce the risk of scaling.
It extends the continuous operation time of the heat exchanger, reduces the cleaning frequency, avoids the shutdown of the entire circulation system, and improves the stability and safety of the process.
Smart Images
Figure CN222978694U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchange equipment cleaning, and is an on-line backwashing device for a heat exchange cooler. Background Technique
[0002] At present, the circulating cooling system is a basic process in chemical production. The 32°C circulating water system is used as the cooling medium in the production of 1,4-butanediol (BDO) to remove the reaction heat and effectively control the operating temperature of the device within the designed range. However, during the process operation, due to the flow scouring of the pipeline medium and the process treatment of the circulating water system itself, impurities such as silt are likely to accumulate in the circulating water pipeline, resulting in fouling of the heat exchanger, a decrease in the heat exchange effect, and the inability to meet the requirements of continuous and stable operation of the process.
[0003] At present, the treatment of heat exchanger fouling basically depends on chemical cleaning or high-pressure physical cleaning. However, no matter which of the above methods is used, the device needs to be shut down for treatment, reducing the operating time of the device, affecting the production capacity and increasing the labor cost. Summary of the Invention
[0004] The utility model provides an on-line backwashing device for a heat exchange cooler, which overcomes the above-mentioned deficiencies of the prior art and can effectively solve the problems of production stoppage and production reduction of the BDO production device caused by heat exchanger fouling.
[0005] The technical solution of the utility model is realized by the following measures: An on-line backwashing device for a heat exchange cooler includes a heat exchanger. A circulating cooling water inlet pipeline is fixedly connected to the heat exchanger inlet, and a circulating cooling water outlet pipeline is fixedly connected to the heat exchanger outlet. A first treatment pipeline is fixedly connected between the circulating cooling water inlet pipeline and the circulating cooling water outlet pipeline. An anti-backwashing inlet pipeline is fixedly connected between the circulating cooling water inlet pipeline between the first treatment pipeline and the heat exchanger inlet and the circulating cooling water outlet pipeline between the first treatment pipeline and the heat exchanger outlet. An anti-backwashing outlet pipeline is fixedly connected between the circulating cooling water inlet pipeline between the anti-backwashing inlet pipeline and the heat exchanger inlet and the circulating cooling water outlet pipeline between the anti-backwashing inlet pipeline and the first treatment pipeline.
[0006] The following is a further optimization and / or improvement of the above-mentioned technical solution of the utility model:
[0007] Electric heating tapes are wound around both the anti-backwashing inlet pipeline and the anti-backwashing outlet pipeline.
[0008] Heat insulation layers are provided on the outer sides of the electric heating tapes of the anti-backwashing inlet pipeline and the anti-backwashing outlet pipeline, and the heat insulation layers are all glass wool or composite silicate or rock wool or aluminum silicate wool.
[0009] A drain pipe is fixedly connected to the circulating cooling water inlet pipeline between the above-mentioned backwashing outlet pipeline and the inlet of the heat exchanger, and a drain valve is fixedly installed on the drain pipe.
[0010] Valves are provided on the above-mentioned first treatment pipeline, backwashing inlet pipeline and backwashing outlet pipeline. A valve is provided on the circulating cooling water inlet pipeline between the first treatment pipeline and the backwashing inlet pipeline. A valve is provided on the circulating cooling water outlet pipeline between the first treatment pipeline and the backwashing outlet pipeline. A valve is provided on the circulating cooling water inlet pipeline between the backwashing inlet pipeline and the backwashing outlet pipeline. A valve is provided on the circulating cooling water outlet pipeline between the backwashing inlet pipeline and the backwashing outlet pipeline.
[0011] The utility model has a reasonable and compact structure and is convenient to use. It adds a backwashing inlet pipeline and a backwashing outlet pipeline to the heat exchanger, regularly conducts on-line backwashing on the heat exchanger, reduces the risk of scale formation on the heat exchanger, extends the continuous operation time of the heat exchanger, reduces the cleaning frequency of the heat exchanger, avoids affecting the shutdown of the entire circulation system and the operation of normal processes, and has the characteristics of safety and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Attached Figure 1 is a schematic process flow diagram of the utility model.
[0013] Attached Figure 1 The codes in are respectively: 1 is the heat exchanger, 2 is the circulating cooling water inlet pipeline, 3 is the circulating cooling water outlet pipeline, 4 is the first treatment pipeline, 5 is the backwashing inlet pipeline, 6 is the backwashing outlet pipeline, 7 is the drain pipe, and 8 is the valve. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0014] The utility model is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solutions of the utility model and the actual situation.
[0015] In the utility model, unless otherwise specified, the equipment and devices used are the existing well-known and commonly used equipment and devices in the art. For example, the heat exchanger can be an existing well-known and commonly used equipment.
[0016] In the utility model, for the convenience of description, the description of the relative position relationship of each component is based on the layout mode of the attached Figure 1 drawing. For example, the position relationships such as front, back, up, down, left, and right are determined according to the layout direction of the attached Figure 1 drawing.
[0017] The following describes the utility model in further detail with reference to the embodiments and the attached drawings:
[0018] Embodiment 1: As shown in the attached Figure 1As shown in the figure, the on-line backwashing device for the heat exchange cooler includes a heat exchanger 1. The inlet of the heat exchanger 1 is fixedly connected to a circulating cooling water inlet pipeline 2, and the outlet of the heat exchanger 1 is fixedly connected to a circulating cooling water outlet pipeline 3. A first treatment pipeline 4 is fixedly connected between the circulating cooling water inlet pipeline 2 and the circulating cooling water outlet pipeline 3. An anti-backwashing inlet pipeline 5 is fixedly connected between the circulating cooling water inlet pipeline 2 between the first treatment pipeline 4 and the inlet of the heat exchanger 1 and the circulating cooling water outlet pipeline 3 between the first treatment pipeline 4 and the outlet of the heat exchanger 1. An anti-backwashing outlet pipeline 6 is fixedly connected between the circulating cooling water inlet pipeline 2 between the anti-backwashing inlet pipeline 5 and the inlet of the heat exchanger 1 and the circulating cooling water outlet pipeline 3 between the anti-backwashing inlet pipeline 5 and the first treatment pipeline 4.
[0019] In the prior art, due to the accumulation of impurities in the circulating cooling water in the heat exchanger 1, the heat exchange efficiency of the heat exchanger 1 is reduced. It is necessary to stop the operation of the entire circulating cooling system and then perform chemical cleaning or high-pressure physical cleaning on the heat exchanger 1, which affects the normal process operation. In the present utility model, an anti-backwashing inlet pipeline 5 and an anti-backwashing outlet pipeline 6 are added to the heat exchanger 1 to regularly perform on-line backwashing on the heat exchanger 1, reduce the risk of scaling of the heat exchanger 1, extend the continuous operation time of the heat exchanger 1, reduce the cleaning frequency of the heat exchanger 1, and avoid affecting the shutdown of the entire circulating system and the operation of the normal process.
[0020] According to actual needs, the above on-line backwashing device for the heat exchange cooler can be further optimized or / and improved:
[0021] Embodiment 2: The difference from Embodiment 1 is that: as shown in the appendix Figure 1 As shown in the figure, electric heating tapes are wound around both the anti-backwashing inlet pipeline 5 and the anti-backwashing outlet pipeline 6. Through such a setting, the freezing of the anti-backwashing inlet pipeline 5 and the anti-backwashing outlet pipeline 6 is avoided.
[0022] Embodiment 3: The difference from Embodiments 1 to 2 is that: as shown in the appendix Figure 1 As shown in the figure, heat preservation layers are provided on the outer sides of the electric heating tapes of the anti-backwashing inlet pipeline 5 and the anti-backwashing outlet pipeline 6, and the heat preservation layers are all glass wool or composite silicate or rock wool or aluminosilicate wool. Through such a setting, the anti-backwashing inlet pipeline 5 and the anti-backwashing outlet pipeline 6 are heat-preserved by using heat-preservation materials such as glass wool or composite silicate or rock wool or aluminosilicate wool to avoid the freezing of the pipelines in winter.
[0023] Embodiment 4: The difference from Embodiments 1 to 3 is that: as shown in the appendix Figure 1 As shown in the figure, a drain pipe 7 is fixedly connected to the circulating cooling water inlet pipeline 2 between the anti-backwashing outlet pipeline 6 and the inlet of the heat exchanger 1, and a valve 8 is fixedly installed on the drain pipe 7.
[0024] Example 5: The difference from Examples 1 to 4 is that, as shown in Figure 1 the figure, valves 8 are provided on the first treatment pipeline 4, the backwash inlet pipeline 5, and the backwash outlet pipeline 6. Valves 8 are provided on the circulating cooling water inlet pipeline 2 between the first treatment pipeline 4 and the backwash inlet pipeline 5. Valves 8 are provided on the circulating cooling water outlet pipeline 3 between the first treatment pipeline 4 and the backwash outlet pipeline 6. Valves 8 are provided on the circulating cooling water inlet pipeline 2 between the backwash inlet pipeline 5 and the backwash outlet pipeline 6. Valves 8 are provided on the circulating cooling water outlet pipeline 3 between the backwash inlet pipeline 5 and the backwash outlet pipeline 6.
[0025] According to needs, on each pipeline and equipment of the on-line backwashing device for the heat exchange cooler, conventional thermometers, pressure gauges, etc. well-known and commonly used in the art can also be provided according to production needs.
[0026] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effects. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.
[0027] The using process of the embodiment of the present utility model:
[0028] Normal operation process: The circulating cooling water is sent to the heat exchanger 1 through the circulating cooling water inlet pipeline 2 and then sent out through the circulating cooling water outlet pipeline 3; Backwashing process: When the heat exchanger 1 has low heat exchange efficiency due to internal scaling or impurity deposition, the circulating cooling water is sent to the heat exchanger 1 through the circulating cooling water inlet pipeline 2, the backwash inlet pipeline 5, and the circulating cooling water outlet pipeline 3 for reverse flushing. The reverse flushing waste water is sent out through the circulating cooling water inlet pipeline 2, the backwash outlet pipeline 6, and the circulating cooling water outlet pipeline 3. After the backwashing is completed, the normal operation is restored; Fault repair process: The circulating cooling water is sent out through the circulating cooling water inlet pipeline 2, the first treatment pipeline 4, and the circulating cooling water outlet pipeline 3 to clean, repair, or replace the heat exchanger 1.
Claims
1. An online backwashing device for a heat exchange cooler, characterized in that It includes a heat exchanger, wherein the heat exchanger inlet is fixedly connected with a circulating cooling water inlet pipeline, the heat exchanger outlet is fixedly connected with a circulating cooling water outlet pipeline, a first treatment pipeline is fixedly connected between the circulating cooling water inlet pipeline and the circulating cooling water outlet pipeline, a backwash inlet pipeline is fixedly connected between the circulating cooling water inlet pipeline between the first treatment pipeline and the heat exchanger inlet and the circulating cooling water outlet pipeline between the first treatment pipeline and the heat exchanger outlet, and a backwash outlet pipeline is fixedly connected between the circulating cooling water inlet pipeline between the backwash inlet pipeline and the heat exchanger inlet and the circulating cooling water outlet pipeline between the backwash inlet pipeline and the first treatment pipeline.
2. The online backwashing device for heat exchange cooler according to claim 1, characterized in that Electric heating belts are coiled around the backwash water inlet pipeline and the backwash water outlet pipeline.
3. The online backwashing device for heat exchange cooler according to claim 2 is characterized in that The outer sides of the electric heating belts of the backwash water inlet pipeline and the backwash water outlet pipeline are provided with insulation layers, and the insulation layers are all glass wool, composite silicate, rock wool or aluminum silicate wool.
4. The online backwashing device for a heat exchange cooler according to claim 1, 2 or 3, characterized in that A shower pipe is fixedly connected to the circulating cooling water inlet pipeline between the backwash outlet pipeline and the heat exchanger inlet, and a shower valve is fixedly installed on the shower pipe.
5. The online backwashing device for heat exchange cooler according to claim 3, characterized in that A shower pipe is fixedly connected to the circulating cooling water inlet pipeline between the backwash outlet pipeline and the heat exchanger inlet, and a shower valve is fixedly installed on the shower pipe.
6. The online backwashing device for a heat exchange cooler according to claim 1, 2, 3 or 5, characterized in that Valves are provided on the first treatment pipeline, the backwash water inlet pipeline and the backwash water outlet pipeline, a valve is provided on the circulating cooling water inlet pipeline between the first treatment pipeline and the backwash water inlet pipeline, a valve is provided on the circulating cooling water outlet pipeline between the first treatment pipeline and the backwash water outlet pipeline, a valve is provided on the circulating cooling water inlet pipeline between the backwash water inlet pipeline and the backwash water outlet pipeline, and a valve is provided on the circulating cooling water outlet pipeline between the backwash water inlet pipeline and the backwash water outlet pipeline.
7. The online backwashing device for a heat exchange cooler according to claim 4, characterized in that Valves are provided on the first treatment pipeline, the backwash water inlet pipeline and the backwash water outlet pipeline, a valve is provided on the circulating cooling water inlet pipeline between the first treatment pipeline and the backwash water inlet pipeline, a valve is provided on the circulating cooling water outlet pipeline between the first treatment pipeline and the backwash water outlet pipeline, a valve is provided on the circulating cooling water inlet pipeline between the backwash water inlet pipeline and the backwash water outlet pipeline, and a valve is provided on the circulating cooling water outlet pipeline between the backwash water inlet pipeline and the backwash water outlet pipeline.