Bottom fountain suspension mixing type solution extraction reaction device

Abstract

The utility model relates to the technical field of organic waste treatment, in particular to a bottom fountain suspension mixing type solution extraction reaction device which comprises a main body, an injection device is arranged on the inner side of the main body and divides a cavity on the inner side of the main body into a mixing cavity and a separation cavity, the mixing cavity is located above the injection device, and the separation cavity is located above the mixing cavity. The separation cavity is located below the spraying device, the main body is provided with a feeding port communicated with the mixing cavity, the spraying device is provided with a discharging port communicated with the mixing cavity, the separation cavity is internally provided with a separation device, the separation device comprises a filter plate, and the filter plate divides the separation cavity into a solid-liquid separation area and a liquid phase collection area. The solid-liquid separation area is communicated with the mixing cavity through a discharge port of the injection device, the solid-liquid separation area is communicated with the discharge port, and the liquid phase collection area is communicated with the liquid discharge port. The problems of non-uniform material mixing, incomplete dissolution and slow reaction can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of organic waste treatment, in particular to a bottom fountain suspension mixing type dissolution reaction device. Background Art

[0002] The development of sludge from "conventional dehydration" to "deep dehydration" has become a key link in achieving the goals of "reduction", "stabilization", "harmlessness" and "resource utilization" in sludge treatment. Promoting deep dehydration of sludge can not only significantly reduce the discharge of sludge, facilitate storage, transportation and reduce the load of subsequent treatment and disposal, directly reflecting the effect of reduction, but also promote resource utilization such as aerobic composting, soil material utilization and extraction and recovery of useful substances, avoid waste of resources, and increase the calorific value of sludge, reduce energy consumption in subsequent drying, incineration or carbonization, greatly save energy, and ultimately reduce the comprehensive carbon emissions in the entire water treatment industry.

[0003] Traditional sludge dewatering treatment processes usually use plate and frame filter pressing, centrifugation and other methods to dewater sludge. This dehydration method often requires the addition of a large amount of lime and other agents, resulting in poor dehydration effect and low efficiency. The prior art usually uses subcritical dimethyl ether (DME) to dissolve and remove moisture from the sludge, and dissolve and extract useful substances, thereby achieving deep dehydration of high-water content organic sludge. However, the reactor used for dissolution and extraction in the prior art has problems such as uneven mixing of DME and materials, incomplete dissolution, and slow reaction, which has become a key technology restricting the industrial application of this method. Utility Model Content

[0004] The utility model provides a bottom fountain suspension mixing type dissolution and extraction reaction device, which can solve the problems of uneven material mixing, incomplete dissolution and slow reaction.

[0005] This application provides the following technical solutions:

[0006] A bottom fountain suspended mixing type dissolution reaction device comprises a main body, an injection device is provided inside the main body, the injection device divides the inner cavity of the main body into a mixing chamber and a separation chamber, the mixing chamber is located above the injection device, and the separation chamber is located below the injection device, the main body is provided with a feed port connected to the mixing chamber, the injection device is provided with a discharge port connected to the mixing chamber, a separation device is provided in the separation chamber, the separation device comprises a filter plate, the filter plate divides the separation chamber into a solid-liquid separation zone and a liquid phase collection zone, the solid-liquid separation zone is connected to the mixing chamber through the discharge port of the injection device, the solid-liquid separation zone is connected to the discharge port, and the liquid phase collection zone is connected to the discharge port.

[0007] Beneficial effects: A bottom fountain suspension-mixing dissolution reaction device can be used for dimethyl ether (DME) solvent desolvation to remove moisture from high-water-content, muddy organic waste materials and dissolve and extract useful substances. After mixing treatment and solid-liquid separation, a solid phase product with a moisture content of less than 40% and a liquid phase product with high added value organic components are obtained, and dimethyl ether can be recycled. Under the spraying action of dimethyl ether solvent, semi-solid and agglomerated materials such as sludge and kitchen waste in the material are dispersed and suspended in the middle of the reactor, and are fully dissolved during the falling and sedimentation process to produce a suspension-mixing reaction. At the same time, the material deposited on the liquid spray plate is rinsed and soaked by the sprayed dimethyl ether solvent, so that the material is in a flowing state, so that the material and the solvent are mixed evenly, fully contacted, dissolved thoroughly, and the reaction is more rapid, which greatly reduces energy consumption. Moreover, it is possible to achieve full mixing and dissolution extraction of semi-solid and agglomerated high-water-content organic waste materials and dimethyl ether solvent without forced stirring, which greatly reduces energy consumption, can effectively promote the large-scale and industrialized application of dimethyl ether dissolution technology, and has good economic benefits. Integrating the solid-liquid separation device into the solvent extraction reaction device can improve material handling efficiency, simplify the process flow, reduce equipment investment and floor space, and also reduce the risk of pollution caused by material transfer. The separation device can achieve fast and effective solid-liquid separation, reduce separation time, and improve separation efficiency. It can effectively remove solvents, reduce solvent consumption and waste emissions, reduce production costs, and improve the environmental friendliness of the reaction process. This technical solution can be adjusted according to different material characteristics and reaction requirements, and is suitable for various types of solvent extraction and reaction processes, and has a wide range of applicability.

[0008] Furthermore, the spray device comprises a liquid spray plate, on which a plurality of liquid spray nozzles are arranged, and the plurality of liquid spray nozzles are respectively connected with the feed pipe through flow channels arranged on the liquid spray plate.

[0009] Beneficial effect: Multiple spray nozzles can ensure that the solvent is evenly distributed in the cavity, so that the solvent and the material are fully in contact, resulting in a suspension-mixing reaction and improving the dissolution efficiency.

[0010] Furthermore, the liquid spraying plate is provided with an inverted conical groove, the groove bottom of the inverted conical groove is provided with a discharge port, and the groove wall of the inverted conical groove is provided with a plurality of liquid spraying nozzles arranged in a circumferential array.

[0011] Beneficial effects: The inverted conical groove helps the solvent to form turbulent effect in the mixing chamber, improves mass transfer efficiency, provides dispersion and stirring of materials, and reduces agglomeration.

[0012] Furthermore, the liquid spray nozzle is provided with a plurality of spray holes, and the spray pressure is 0.75-1.5 MPa.

[0013] Beneficial effects: The injection pressure is between 0.75 and 1.5 MPa, which can not only meet the needs of suspension-mixed reactions, but also avoid unnecessary energy consumption, reduce production costs, and improve energy efficiency.

[0014] Furthermore, an air recoil device is provided at the discharge port.

[0015] Beneficial effects: The air recoil device can effectively clean the discharge port, prevent the discharge port from being blocked, and promote the safe discharge of materials.

[0016] Furthermore, the main body is provided with a monitoring device for monitoring the temperature and pressure inside the main body.

[0017] Beneficial effects: It can monitor the reaction device for leaks in real time to ensure the safety of the device. The monitoring device can be connected to the automatic control system to achieve automatic adjustment of temperature and pressure, reduce manual intervention, and improve the automation level of the reaction process.

[0018] Furthermore, an exhaust valve is provided on the main body.

[0019] Beneficial effects: The exhaust valve can adjust the gas pressure inside the reaction device, avoid overpressure caused by gas accumulation during the reaction, and ensure the safe operation of the reactor. The exhaust valve can also be used to determine whether the monitoring device used to monitor temperature and pressure is operating normally.

[0020] Furthermore, a viewing window is provided on the main body.

[0021] Beneficial effects: The internal situation of the main body can be observed through the visual window to ensure the safety of the device, and the main body can also be entered and exited through the visual window to facilitate maintenance.

[0022] Furthermore, a vacuum device is provided on the main body.

[0023] Beneficial effects: It can promote solid-liquid separation and solvent recovery.

[0024] Furthermore, valves are provided on the feed inlet, the discharge outlet, the discharge outlet and the liquid discharge outlet.

[0025] Beneficial effects: By controlling the opening and closing of different valves, the flow direction of materials and the working mode of the reactor can be flexibly adjusted to adapt to different types of reactions and production requirements, thereby improving the versatility and adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the external structure of a bottom fountain suspension mixing type dissolution reaction device of the utility model.

[0027] Figure 2The utility model is a schematic diagram of the internal structure of a bottom fountain suspension mixing type dissolution reaction device.

[0028] Figure 3 It is a top view of the injection device of a bottom fountain suspension mixing type dissolution reaction device of the utility model. DETAILED DESCRIPTION

[0029] The following is further described in detail through specific implementation methods:

[0030] The marks in the drawings of the specification include: main body 1, injection device 2, liquid spray plate 201, liquid spray nozzle 202, inverted cone groove 203, feed pipe 204, feed port 3, discharge port 4, filter plate 5, filter hole 501, discharge port 6, liquid discharge port 7, exhaust valve 8, monitoring device 10, visual window 11, vacuum device 12.

[0031] like Figures 1 to 3As shown, a bottom fountain suspension mixing type dissolution reaction device comprises a main body 1, an injection device 2 is arranged inside the main body 1, and the injection device 2 is fixedly installed on the inner wall of the main body 1 by conventional installation methods such as bolts, welding, and interference fit. The injection device 2 divides the inner cavity of the main body 1 into a mixing chamber and a separation chamber, the mixing chamber is located above the injection device 2, and the separation chamber is located below the injection device 2. A feed port 3 connected to the mixing chamber is arranged on the top of the main body 1, and a valve for controlling the opening and closing of the feed port 3 is arranged on the feed port 3. A discharge port 4 connected to the mixing chamber is arranged on the injection device 2, and a valve for controlling the opening and closing of the discharge port 4 is arranged on the discharge port 4. The valve can be a pneumatic valve or an electric valve, such as a pneumatic ball valve. The spray device 2 includes a liquid spray plate 201, the outer peripheral shape of the liquid spray plate 201 corresponds to the inner wall shape of the main body 1, and a plurality of liquid spray nozzles 202 are provided on the liquid spray plate 201, and the plurality of liquid spray nozzles 202 are respectively connected to a feed pipe 204 through a flow channel provided on the liquid spray plate 201, and the feed pipe 204 is used to connect to a solvent storage tank, and a valve for controlling the opening and closing of the feed pipe 204 is provided on the feed pipe 204. If the cross section of the inner wall of the main body 1 is circular, the outer periphery of the liquid spray plate 201 is circular, and the plurality of liquid spray nozzles 202 are arranged in a circular array on the liquid spray plate 201. If the cross section of the inner wall of the main body 1 is rectangular, the outer periphery of the liquid spray plate 201 is rectangular, and the plurality of liquid spray nozzles 202 are arranged in a rectangular array on the rectangular liquid spray plate 201. An inverted conical groove 203 is provided on the upper end surface of the liquid spray plate 201, and a discharge port 4 is provided at the bottom of the inverted conical groove 203. A plurality of liquid spray nozzles 202 arranged in a circular array are provided on the groove wall of the inverted conical groove 203. Specifically, the liquid spray nozzles 202 are arranged in a 3-layer circular array on the liquid spray plate 201. The number of liquid spray nozzles 202 is 15 to 18, and each liquid spray nozzle 202 is provided with five spray holes. The spray pressure is 0.75 to 1.5 MPa. The number of spray holes and the spray pressure can be adjusted according to different material properties and reaction requirements. A separation device is provided in the separation chamber, and the separation device includes a filter plate 5, a filter hole 501 is provided on the filter plate 5, and a filter cloth is provided on the filter plate 5. The filter plate 5 divides the separation chamber into a solid-liquid separation zone and a liquid phase collection zone. The upper end of the solid-liquid separation zone is connected to the mixing chamber through the discharge port 4 of the injection device 2, and the lower end of the solid-liquid separation zone is connected to the discharge port 6 arranged at the bottom of the main body 1, and the discharge port 6 is connected to the solid phase collection device. The liquid phase collection zone is connected to the discharge port 7 arranged at the bottom of the main body 1, and the discharge port 7 is connected to the liquid phase collection device. The discharge port 6 and the discharge port 7 are both provided with valves for controlling the opening and closing of the collection port. An air recoil device is provided at the discharge port 6, which is used to input compressed air to the discharge port 6, clean the discharge port 6, and prevent the discharge port 6 from being blocked. The air recoil device includes an air compressor, an air intake pipeline and an air nozzle. The air nozzle is installed at the discharge port 6, and the air nozzle is connected to the air compressor through the air intake pipe. The air intake pipe is provided with a control valve and a one-way valve.

[0032] The main body 1 is provided with a monitoring device 10 for monitoring the temperature and pressure inside the main body 1. The main body 1 is provided with a cold and hot circulation system, and an exhaust valve 8 is provided on the top of the main body 1. The temperature and pressure inside the main body 1 are maintained within a specific range through the cooperation of the monitoring device 10, the exhaust valve 8, and the thermal circulation system. The main body 1 is a container that can withstand a pressure of at least 5MPa. When the pressure inside the main body 1 exceeds 1MPa, the monitoring device 10 will automatically send out a warning signal, such as a buzzing sound.

[0033] The main body 1 is provided with a plurality of viewing windows 11, which can be located at the top, side wall and bottom of the main body 1. The viewing windows 11 can be used to observe the internal situation of the main body 1, and the main body 1 can also be entered through the viewing windows 11 for maintenance. One end of the viewing window 11 is mounted on the main body 1 through a hinge, and the other end is detachably connected to the main body 1 through a lock. A sealing ring is provided on the outer periphery of the viewing window 11. The viewing window 11 can be made of high borosilicate glass.

[0034] A vacuum pumping device 12 is provided on the top of the main body 1, and the vacuum pumping device 12 includes a vacuum pump, a first air inlet pipe, a second air inlet pipe, and an air outlet pipe. The first air inlet pipe and the second air inlet pipe are connected to the air outlet pipe through the vacuum pump. The first air inlet pipe is provided on the top of the main body 1 and is connected to the mixing chamber for recovering the dimethyl ether solvent. The second air inlet pipe is provided at the drain port 7 and is connected to the liquid phase collection area for promoting solid-liquid separation and recovering the dimethyl ether (DME) solvent. The air outlet pipe is connected to the dimethyl ether storage tank. The first air inlet pipe and the second air inlet pipe are both provided with valves and one-way valves.

[0035] An extraction process using a bottom fountain suspension mixing dissolution reaction device, which is used for removing water from high-water-content, muddy organic waste materials by dimethyl ether solvent removal and dissolving and extracting useful substances, comprises the following steps:

[0036] 1) Materials are added from the upper end of a closed solvent extraction reaction device, and solvents are sprayed from the lower end of the closed solvent extraction reaction device. The materials and solvents are mixed evenly and reacted fully to obtain a solid-liquid mixture.

[0037] Specifically, high-water-content, muddy organic waste materials are added from the upper end of the mixing chamber through the feed port at the top of the closed solvent extraction reaction device, and liquid dimethyl ether solvent is sprayed from the lower end of the mixing chamber through the spray device. At this time, the pneumatic ball valve of the discharge port is in a closed state. Under the spraying action of dimethyl ether solvent, semi-solid and agglomerated materials such as sludge and kitchen waste in the material are dispersed and suspended in the middle of the reactor, and are fully dissolved during the falling and sedimentation process to produce a suspended mixed reaction. At the same time, the material deposited on the spray plate is rinsed and soaked by the sprayed dimethyl ether solvent, so that the material is in a flowing state, so that the material and the dimethyl ether solvent are evenly mixed and fully contacted and reacted, reducing the need for stirring and mixing and uneven dissolution of conventional stirring reactors. The mass ratio of high-water-content, muddy organic waste materials and liquid dimethyl ether solvent in the mixing chamber of the solvent extraction reaction device is 1:5-10, the reaction pressure is 0.5-0.8MPa, the reaction temperature is 15-30°C, and the reaction time is 10-30 minutes to obtain a solid-liquid mixture. The liquid dimethyl ether solvent in the mixing chamber will be vaporized during the reaction process. The vaporization of dimethyl ether will increase the pressure in the closed mixing chamber. When the monitoring device detects that the pressure in the mixing chamber exceeds 0.5-0.8MPa, the pressure in the mixing chamber can be kept within a specific range by controlling the opening and closing of the exhaust valve. When the reaction pressure in the mixing chamber is 0.5-0.8MPa, the vaporization of liquid dimethyl ether can be effectively prevented.

[0038] 2) The solid-liquid mixture of step 1) is subjected to solid-liquid separation to obtain a solid phase product with a water content of less than 50% and a liquid phase product of high value-added organic components.

[0039] Specifically, the pneumatic ball valve at the discharge port is opened to allow the solid-liquid mixture in the mixing chamber to enter the solid-liquid separation zone of the separation device through the feed port, and the liquid phase material therein enters the liquid phase collection zone through the filter plate and enters the liquid phase collection device through the discharge port; the solid phase product therein is retained in the solid-liquid separation zone and enters the solid phase collection device through the discharge port. When performing solid-liquid separation, the vacuum pumping device at the discharge port is opened to promote solid-liquid separation, and at the same time, the vaporized dimethyl ether (DME) solvent in the solvent extraction reaction device is recovered, and the dimethyl ether solvent is liquefied by compression and condensation and recovered into the dimethyl ether storage tank. Alternatively, the pneumatic ball valve at the discharge port is closed, and the vaporized dimethyl ether solvent in the mixing chamber and the separation chamber is respectively recovered into the dimethyl ether storage tank through the first air inlet pipe and the second air inlet pipe of the vacuum pumping device.

[0040] After the solid-liquid separation is completed, when collecting the solid phase products left in the solid-liquid separation area, the solid phase products will block the discharge port, making it difficult to collect the solid phase products. Start the air compressor, open the control valve on the air inlet pipe, and spray compressed air to the discharge port through the air nozzle to make the discharge port unobstructed, so that the solid phase products can enter the solid phase collection device through the discharge port.

[0041] 3) Recovering the solvent in the liquid phase product obtained in step 2), and adding the recovered liquid solvent into the solvent extraction reaction device again to participate in the reaction.

[0042] Specifically, the liquid product in the liquid phase collecting device is added to the separation device to recover the dimethyl ether solvent in the liquid product; the separation device is heated and evaporated by circulating hot water, the vaporized dimethyl ether solvent is compressed by a compressor and then condensed and liquefied in a condenser, the liquid dimethyl ether solvent is recovered to a solvent storage tank, and the recovered liquid dimethyl ether solvent is added to the solvent extraction reaction device again to participate in the reaction, thereby realizing the recycling of the solvent, reducing production costs and protecting the environment.

[0043] Table 1

[0044]

[0045] As shown in Table 1 above, when other reaction conditions are the same, when the reaction time of the bottom fountain suspension-mixing dissolution reaction device is 10 minutes, the moisture content of the high-water-content, muddy organic waste material is reduced to 36%, and the dehydration rate reaches 90.8%, while the stirring reaction device needs to react for 50 minutes to achieve this effect. The following Table 2 shows the content and extraction rate of various substances in the material after the material reacts for 10 minutes in each reaction device. It can be seen from Table 2 that after the material reacts in the bottom fountain suspension-mixing dissolution reaction device for 10 minutes, the organic matter extraction rate in the material reaches 38%, the oil extraction rate reaches 100%, the protein extraction rate reaches 30%, and the polysaccharide extraction rate reaches 48%; while after the same reaction time, the organic matter extraction rate, oil extraction rate, protein extraction rate, and polysaccharide extraction rate of the stirring reaction device are all lower than the material extracted by the bottom fountain suspension-mixing dissolution reaction device. Moreover, the energy consumption of treating 15 kg of material by a stirring reaction device is 9.86 KW·h, while the energy consumption of treating by a bottom fountain suspension mixing extraction reaction device is only 5.5 KW·h, which greatly reduces energy consumption and effectively reduces production costs. This technical solution has the advantages of short dehydration time, good dehydration effect, high extraction rate of high value-added organic matter, and high recovery rate of dimethyl ether for high water content and muddy organic waste materials.

[0046] Table 2

[0047] parameter Stirring reactor Fountain suspension mixing reaction device Moisture content% 63 36 Dehydration rate% 73 90.8 Organic matter content% 64 44 Organic matter extraction rate % 13 38 Oil content% 0.9 0.1 Oil extraction rate% 85 100 Protein content% 24.3 17.5 Protein extraction rate % 2.7 29.8 Polysaccharide content% 27.3 16.4 Polysaccharide extraction rate % 13.3 48 Lower calorific value MJ / kg 3.22 6.86

[0048] The above is only an embodiment of the utility model. The utility model is not limited to the field involved in this implementation case. The common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A bottom fountain suspension mixing type dissolution reaction device, comprising a main body, characterized in that: An injection device is provided on the inner side of the main body, and the injection device divides the inner cavity of the main body into a mixing chamber and a separation chamber. The mixing chamber is located above the injection device, and the separation chamber is located below the injection device. A feed port connected to the mixing chamber is provided on the main body, and a discharge port connected to the mixing chamber is provided on the injection device. A separation device is provided in the separation chamber, and the separation device includes a filter plate, and the filter plate divides the separation chamber into a solid-liquid separation zone and a liquid phase collection zone. The solid-liquid separation zone is connected to the mixing chamber through the discharge port of the injection device, the solid-liquid separation zone is connected to the discharge port, and the liquid phase collection zone is connected to the discharge port.

2. The bottom fountain suspension mixing type dissolution reaction device according to claim 1 is characterized in that: The spray device comprises a liquid spray plate, on which a plurality of liquid spray nozzles are arranged, and the plurality of liquid spray nozzles are respectively connected with a feed pipe through flow channels arranged on the liquid spray plate.

3. The bottom fountain suspension mixing type dissolution reaction device according to claim 2 is characterized in that: The liquid spraying plate is provided with an inverted conical groove, the bottom of the inverted conical groove is provided with a discharge port, and the groove wall of the inverted conical groove is provided with a plurality of liquid spraying nozzles arranged in a circumferential array.

4. The bottom fountain suspension mixing type dissolution reaction device according to claim 3 is characterized in that: The liquid spray nozzle is provided with a plurality of spray holes, and the spray pressure is 0.75-1.5 MPa.

5. The bottom fountain suspension mixing type dissolution reaction device according to claim 1 is characterized in that: An air recoil device is provided at the discharge port.

6. The bottom fountain suspension mixing type dissolution reaction device according to claim 1 is characterized in that: The main body is provided with a monitoring device for monitoring the temperature and pressure inside the main body.

7. The bottom fountain suspension mixing type dissolution reaction device according to claim 1 is characterized in that: An exhaust valve is arranged on the main body.

8. The bottom fountain suspension mixing type dissolution reaction device according to claim 1 is characterized in that: The main body is provided with a viewing window.

9. The bottom fountain suspension mixing type dissolution reaction device according to claim 1, characterized in that: The main body is provided with a vacuum pumping device.

10. The bottom fountain suspension mixing type dissolution reaction device according to claim 1, characterized in that: The feed inlet, the discharge outlet, the discharge outlet and the liquid discharge outlet are all provided with valves.

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