Flue gas treatment device for liquid filter pressing of sodium pyrophosphate treatment liquid
By designing a flue gas treatment device consisting of a flue gas collection hood, a spray scrubbing tower, and a circulating water tank, the problem of high-temperature water vapor during the filtration of sodium pyrophosphate treatment liquid was solved, realizing the recycling and utilization of flue gas and environmental protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-03-20
AI Technical Summary
Sodium pyrophosphate treatment solution is heated during filtration, generating a large amount of water vapor, which can easily cause workers to be burned by the high temperature and pollute the environment.
Design a flue gas treatment device, including a flue gas collection hood, a spray scrubbing tower and a circulating water tank. The flue gas is recovered by spray condensation, and the flue gas is drawn out by an induced draft fan and cooled in the spray scrubbing tower. The flue gas delivery pipe is set at an incline to prevent backflow.
It enables the collection and recycling of flue gas, reduces the environmental impact of scattered flue gas emissions, prevents workers from being burned, facilitates cleaning of the filter press, and saves resources.
Smart Images
Figure CN224010778U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of industrial flue gas treatment technology, and more specifically, to a flue gas treatment device for a hydraulic filter used in sodium pyrophosphate treatment. Background Technology
[0002] Sodium pyrophosphate produced by isothermal calcination of glyphosate mother liquor has relatively high contents of sodium chloride, iron, and heavy metals. An effective method for treating sodium pyrophosphate is recrystallization, which requires hydrolysis of sodium pyrophosphate. After hydrolysis, the insoluble matter is filtered to obtain a sodium pyrophosphate treatment solution for further recrystallization. The hydrolysis of sodium pyrophosphate is completed in a pressure reactor. Since the crystallization temperature of sodium pyrophosphate is high, the pressure filtration process of the sodium pyrophosphate treatment solution must be completed in a high-temperature environment. Therefore, after the hydrolyzed sodium pyrophosphate treatment solution comes out of the pressure reactor, it enters the pressure filtration process while being filtered hot. At this time, the temperature of the sodium pyrophosphate treatment solution is as high as 80-110℃, which generates a large amount of water vapor. The generated water vapor not only makes workers susceptible to burns from the high temperature, but also carries volatiles that damage the environment. In addition, the emitted fumes will accelerate the corrosion of nearby equipment and facilities.
[0003] In view of the above, this application is hereby submitted. Utility Model Content
[0004] The technical problem this invention aims to solve is that the high temperature during the filtration of sodium pyrophosphate treatment liquid generates a large amount of water vapor. This water vapor not only causes workers to be easily burned by the high temperature, but also carries volatiles that damage the environment. The purpose is to provide a flue gas treatment device for hydraulic filter presses used in sodium pyrophosphate treatment, which can collect and recycle the flue gas generated during the hydraulic filtration process, reduce the emission of flue gas, prevent operators from being burned by the high temperature flue gas, avoid environmental impact, and facilitate subsequent cleaning of the filter press.
[0005] This utility model is achieved through the following technical solution:
[0006] A flue gas treatment device for a sodium pyrophosphate hydraulic filter includes a flue gas collection hood disposed above a plate filter press, the flue gas collection hood being connected to a horizontally arranged flue gas conveying pipe, the end of which is connected to the lower end of a scrubbing tower.
[0007] The scrubbing tower is equipped with a spray scrubbing device;
[0008] An exhaust pipe is connected to the upper end of the gas scrubbing tower, and an induced draft fan is installed on the exhaust pipe.
[0009] The smoke treatment device can collect and recycle the flue gas generated in the hydraulic pressure filtration process, reduces the scattered flue gas, prevents the operator from being scalded by the high-temperature flue gas, avoids the influence on the environment, and facilitates the subsequent cleaning of the filter press.
[0010] The smoke collection cover is arranged on the plate-and-frame filter press, negative pressure is generated at the front end when the induced draft fan operates, and the flue gas (mainly water vapor) generated during the filtration of the sodium pyrophosphate treatment liquid moves to the negative pressure end, so that the extraction purpose is achieved.
[0011] In a specific embodiment, a support soft curtain is hung below the smoke collection cover, and the support soft curtain tightly encloses the outside of the plate filter press. The support soft curtain can facilitate the operator to pull open the support soft curtain at any time to clean the plate-and-frame filter press and observe the plate-and-frame filtration condition, and the support soft curtain can also ensure the airtightness near the single plate-and-frame filter press.
[0012] In a specific embodiment, a 5kg weight block is arranged at the bottom of the support soft curtain, and a magnet is arranged on the weight block. The magnet can tightly adhere the support soft curtain to the outside of the plate filter press, so as to ensure the airtightness between the support soft curtain and the plate filter press and prevent the escape of flue gas.
[0013] In a specific embodiment, the support soft curtain is made of soft glass curtain, which is transparent and can facilitate the observation of the internal condition of the plate filter press.
[0014] In a specific embodiment, the smoke conveying pipe is arranged to be inclined at an angle of 5-10°. Arranging the smoke conveying pipe to be inclined downward at a certain angle can avoid the condensate flowing back to the plate filter press when the flue gas is conveyed in the smoke conveying pipe.
[0015] In a specific embodiment, the smoke collection cover, the smoke conveying pipe and the exhaust pipe are made of stainless steel.
[0016] In a specific embodiment, the spray gas washing device comprises a plurality of spray heads arranged in sequence along the height direction of the gas washing tower.
[0017] In a specific embodiment, the spray head is connected to a circulating water pool through a water suction pipe, and the circulating water pool is connected to the bottom of the gas washing tower.
[0018] In a specific embodiment, a water pump is arranged on the water suction pipe.
[0019] The water pump can pump the water in the circulating pool into the water pumping pipe, and then the water is sprayed out of the spray head in the washing tower, and the water sprayed out of the spray head can condense the flue gas to the bottom of the washing tower, so as to be recycled in the circulating pool.
[0020] In a specific embodiment, the circulating pool is equipped with a water level monitoring sensor, which can detect the water level of the circulating pool in real time, and the circulating pool is connected with an external water storage tank through a pump and a pipeline, and when the water level exceeds the limit, the water can be automatically transported to the water storage tank, and the circulating pool can also exchange water with the water storage tank in time when the water temperature is high, so that the temperature of the condensed water can be kept at a low level, and the water in the water storage tank can also be used for sodium pyrophosphate hydrolysis treatment.
[0021] In a specific embodiment, the spray head is made of silicon carbide, which has high strength and is resistant to high temperature corrosion, and can avoid damage when contacting high temperature flue gas.
[0022] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0023] 1. The flue gas treatment device for sodium pyrophosphate treatment liquid pressure filtration provided by the embodiment of the utility model can condense and recycle the flue gas generated in the treatment liquid pressure filtration process, which not only reduces the influence of the scattered flue gas on the environment, but also recycles the condensed water to save resources.
[0024] 2. The flue gas treatment device for sodium pyrophosphate treatment liquid pressure filtration provided by the embodiment of the utility model can extract the flue gas generated in the treatment liquid pressure filtration process, isolate the plate type pressure filter, avoid steam evaporation, prevent the operator from being scalded by steam during pressure filtration, and facilitate the observation of the pressure filtration condition and the cleaning of the pressure filter through the soft glass door curtain.
[0025] 3. The flue gas treatment device for sodium pyrophosphate treatment liquid pressure filtration provided by the embodiment of the utility model sets the flue gas conveying pipe to a certain downward inclination angle, which can avoid the condensate backflow to the plate type pressure filter during the conveying of the flue gas in the flue gas conveying pipe.
[0026] 4. The flue gas treatment device for sodium pyrophosphate treatment liquid pressure filtration provided by the embodiment of the utility model is equipped with a circulating pool, and the circulating pool is provided with a water pump, which can pump the water in the circulating pool into the water pumping pipe, and then the water is sprayed out of the spray head in the washing tower, and the water sprayed out of the spray head can condense the flue gas to the bottom of the washing tower, so as to be recycled in the circulating pool. BRIEF DESCRIPTION OF DRAWINGS
[0027] In order to more clearly illustrate the technical scheme in the example embodiments of the present application, the drawings used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained without creative labor on the basis of these drawings.
[0028] Fig. 1 The structure schematic diagram of the gas extraction section of the flue gas treatment device provided by the present application is shown in the figure.
[0029] Fig. 2 The structure schematic diagram of the gas washing tower provided by the present application is shown in the figure.
[0030] Fig. 3 The schematic diagram of the circulating water pool provided by the present application is shown in the figure.
[0031] The marks in the drawings and the corresponding names of the parts are as follows:
[0032] 1-plate filter press, 2-supporting soft curtain, 3-flue gas collecting cover, 4-flue gas conveying pipe, 5-gas washing tower, 6-induced draft fan, 7-water pump, 8-circulating water pool, 9-sprinkler head, 10-exhaust pipe, 11-water suction pipe. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail in combination with the embodiments and drawings. The illustrative embodiments of the present application and the description thereof are only used to explain the present application, and should not be considered as limiting the present application.
[0034] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without these specific details. In other embodiments, in order to avoid obscuring the present application, well-known structures are not specifically described.
[0035] Reference throughout this specification to "one embodiment", "an embodiment", "one example", or "an example", means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the application. The appearances of the phrases "in one embodiment", "in an embodiment", "in one example" or "in an example" in various places in the specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics can be combined in any suitable
[0036] In the description of the present application, the terms "front", "back", "left", "right", "top", "bottom", "vertical", "horizontal", "high", "low", "inner", "outer" and the like indicate the orientation or positional relationship based on 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 device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application.
[0037] Embodiment
[0038] As Figs. 1-3 shown, the smoke treatment device for sodium pyrophosphate treatment liquid pressure filtration provided by the embodiment of the present application comprises a smoke collecting cover 3 arranged above a plate filter press 1, the smoke collecting cover 3 is communicated with a horizontally arranged smoke conveying pipe 4, and the end of the smoke conveying pipe 4 is connected to the lower end of a gas washing tower 5.
[0039] The gas washing tower 5 is provided with a spray gas washing device.
[0040] The upper end of the gas washing tower 5 is connected with an exhaust pipe 10, and the exhaust pipe 10 is provided with an induced draft fan 6.
[0041] The smoke treatment device can collect and recycle the smoke generated in the treatment liquid pressure filtration process, reduce the scattered exhaust smoke, prevent the operator from being scalded by high-temperature smoke, avoid the influence on the environment, and facilitate the subsequent cleaning of the filter press.
[0042] The smoke collecting hood is arranged on the plate and frame filter press, and a negative pressure is generated at the front end when the induced draft fan is running. The smoke (mainly water vapor) generated during the filtration of the sodium pyrophosphate treatment solution will move to the negative pressure end, so as to achieve the purpose of extraction. When the induced draft fan is running, the smoke is introduced into the gas washing tower through the smoke conveying pipe connected with the smoke collecting hood. The gas washing tower is provided with a spraying gas washing device, which can spray water into the gas washing tower. Most of the smoke is collected and recovered after being cooled by the water sprayed by the spraying gas washing device from bottom to top. The remaining small part of the smoke is discharged from the top of the gas washing tower, then enters the exhaust pipe after the induced draft fan, and is finally discharged and treated.
[0043] In a specific embodiment, a support soft curtain 2 is hung below the smoke collecting hood 3, which tightly encloses the outside of the plate filter press 1. The support soft curtain can be easily opened by the operator to clean the plate and frame filter press and observe the plate and frame filter condition. The support soft curtain can also ensure the airtightness near the single plate and frame filter press.
[0044] In a specific embodiment, a 5kg weight block is arranged at the bottom of the support soft curtain 2, and a magnet is arranged on the weight block. The magnet can tightly adhere the support soft curtain to the outside of the plate filter press, so as to ensure the airtightness between the support soft curtain and the plate filter press and prevent the escape of smoke.
[0045] In a specific embodiment, the support soft curtain 2 is made of soft glass curtain, which is transparent and can facilitate the observation of the internal condition of the plate filter press.
[0046] In a specific embodiment, the smoke conveying pipe 4 is arranged in an inclined manner, and the inclination angle is 5-10°. Arranging the smoke conveying pipe in a downward inclined manner at a certain angle can avoid the condensation and backflow of the smoke to the plate filter press during the conveying of the smoke in the smoke conveying pipe.
[0047] In a specific embodiment, the smoke collecting hood 3, the smoke conveying pipe 4 and the exhaust pipe 10 are all made of stainless steel.
[0048] In a specific embodiment, the spraying gas washing device comprises a plurality of spraying heads 9 arranged in sequence along the height direction of the gas washing tower 5.
[0049] In a specific embodiment, the spraying head 9 is connected with the circulating water tank 8 through the water suction pipe 11, and the circulating water tank 8 is communicated with the bottom of the gas washing tower 5.
[0050] In a specific embodiment, a water pump 7 is arranged on the water suction pipe 11.
[0051] The utility model discloses a circulating water pool is equipped with, circulating water pool is provided with water pump, this water pump can draw the water of circulating water pool into the water suction pipe, and then enters the spray head in the washing tower and sprays and goes out, and the water that the spray head sprays can condense the flue gas to the bottom of washing tower, and thereby enters the recycling in circulating water pool.
[0052] In a specific embodiment, the circulating water pool is equipped with a water level monitoring sensor, which can detect the water level of the circulating water pool in real time. The circulating water pool is connected to an external water storage tank through a pump and a pipeline. When the water level exceeds the limit, the water will be automatically transported to the storage tank. At the same time, the circulating water pool can also exchange water with the storage tank in time when the water temperature is high, ensuring that the temperature of the condensed water remains at a low level. The water in the storage tank can also be used for sodium pyrophosphate hydrolysis treatment.
[0053] In a specific embodiment, the spray head 9 is made of silicon carbide, which has high strength and is resistant to high-temperature corrosion, preventing damage when in contact with high-temperature flue gas.
[0054] The above specific embodiments further explain the purpose, technical solutions, and benefits of the utility model. It should be understood that the above description is only a specific embodiment of the utility model and does not limit the scope of protection. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the utility model should be included in the scope of protection.
Claims
1. A flue gas treatment device for a sodium pyrophosphate-treated hydraulic filter, characterized in that, Includes a flue gas collection hood (3) installed above the plate filter press (1), the flue gas collection hood (3) being connected to a horizontally arranged flue gas conveying pipe (4), the end of which is connected to the lower end of the gas scrubbing tower (5); The gas scrubbing tower (5) is equipped with a spray scrubbing device; The upper end of the gas scrubbing tower (5) is connected to an exhaust pipe (10), and an induced draft fan (6) is installed on the exhaust pipe (10).
2. The flue gas treatment device for sodium pyrophosphate hydraulic filtration according to claim 1, characterized in that, A supporting soft curtain (2) is suspended below the flue gas collection hood (3), and the supporting soft curtain (2) tightly surrounds the outside of the plate filter press (1).
3. A flue gas treatment device for a sodium pyrophosphate treatment hydraulic filter according to claim 2, characterized in that, The bottom of the supporting soft curtain (2) is provided with a weight block, and the weight block is provided with a magnet.
4. A flue gas treatment device for a sodium pyrophosphate treatment hydraulic filter according to claim 2, characterized in that, (2) The support for the soft door curtain is made of soft glass.
5. A flue gas treatment device for a sodium pyrophosphate treatment hydraulic filter according to claim 1, characterized in that, The flue gas conveying pipe (4) is inclined, with an inclination angle of 5 to 10°.
6. A flue gas treatment device for a sodium pyrophosphate treatment hydraulic filter according to claim 1, characterized in that, The flue gas collection hood (3), flue gas conveying pipe (4) and exhaust pipe (10) are all made of stainless steel.
7. A flue gas treatment device for a sodium pyrophosphate treatment hydraulic filter according to claim 3, characterized in that, The spray scrubbing device includes multiple spray heads (9) arranged sequentially along the height direction of the scrubbing tower (5).
8. A flue gas treatment device for a sodium pyrophosphate treatment hydraulic filter according to claim 7, characterized in that, The spray head (9) is connected to the circulating water tank (8) through the water pumping pipe (11), and the circulating water tank (8) is connected to the bottom of the air scrubbing tower (5).
9. A flue gas treatment device for a sodium pyrophosphate treatment hydraulic filter according to claim 8, characterized in that, A water pump (7) is installed on the water pumping pipe (11).
10. A flue gas treatment device for a sodium pyrophosphate treatment hydraulic filter according to claim 8, characterized in that, The spray head (9) is made of silicon carbide.