Devices for cooling materials by venting and venting material handling systems

Abstract

The present application proposes a device for cooling discharged materials and a discharged material processing system, the device for cooling discharged materials comprises a discharge pipe, the upstream end of the discharge pipe is connected to a device to be discharged and the downstream end is connected to a gas-liquid separation tank; a cooling medium container storing a cooling medium; a cooling medium delivery pipe for delivering the cooling medium to the discharge pipe, the cooling medium delivery pipe is connected to the discharge pipe through a connecting hole provided on the discharge pipe; a negative pressure member is provided in the inner cavity of the discharge pipe, the negative pressure member is used to form a negative pressure area at the connecting hole, when the device to be discharged is discharged, the cooling medium in the cooling medium container is sucked into the discharge pipe, the high-temperature discharged material and the cooling medium are fully mixed by the shearing action of the high-speed fluid jet, and the temperature of the discharged material is reduced by absorbing heat by the cooling medium.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical equipment, and in particular relates to a device for cooling discharged materials and a discharged material processing system. Background Art

[0002] In the reaction of high-energy materials (such as toluene oxidation reaction), abnormal conditions sometimes occur, and it is necessary to discharge the discharged materials, and transport them to the gas-liquid separation tank before they can be discharged to the discharge post-treatment system. During discharge, the temperature of the discharged materials needs to be reduced to a certain value before they can be discharged into the discharge post-treatment system to avoid overheating of the discharge pipeline and the discharge post-treatment system.

[0003] For a discharge system with a relatively low discharge temperature (e.g., a discharge temperature less than 250 degrees Celsius), the discharged material can be discharged to the discharge post-treatment system after being treated in a gas-liquid separation tank. However, for a discharge system with a relatively high discharge temperature (a discharge temperature not less than 250 degrees Celsius), the discharged material cannot be reduced to an acceptable temperature by simply treating it in a gas-liquid separation tank.

[0004] At present, the common method for treating high-temperature (discharge temperature not less than 250 degrees Celsius) discharge materials is to first send the high-temperature discharge materials into a quenching tank for mixing with a quenching agent. The sensible heat of the quenching agent is used to reduce the discharge material to an acceptable temperature, and then the gas-liquid separation is discharged to the post-processing system. This method uses the sensible heat of the cooling medium to cool the discharge material, and the heat exchange effect between the discharge material and the cooling medium is poor and requires a large amount of quenching agent and a large quenching tank. Summary of the invention

[0005] In view of some or all of the above-mentioned technical problems existing in the prior art, a device for cooling discharged materials and a discharged material processing system are provided. The device for cooling discharged materials is applied to the discharged material processing system to cool the discharged materials. Moreover, the device for cooling discharged materials utilizes the low-pressure zone formed in the discharge pipe after the high-flow rate discharged materials pass through the negative pressure piece, and the cooling medium is sucked into the discharge pipe. The discharged materials and the sucked cooling medium are fully mixed by the shearing action of the high-speed fluid, and the temperature of the discharged materials is quickly reduced by absorbing heat by the cooling medium. The device for cooling discharged materials has a simple structure and does not need to set up a quenching tank. In addition, part of the cooling medium will be vaporized and quickly absorb heat during the high-speed fluid jet flow, which improves the cooling efficiency and reduces the amount of cooling medium.

[0006] According to one aspect of the present invention, the proposed technical solution is:

[0007] A device for cooling discharged materials, comprising:

[0008] A discharge pipe, wherein the upstream end of the discharge pipe is connected to the equipment to be discharged and the downstream end is connected to the gas-liquid separation tank,

[0009] a cooling medium container storing a cooling medium,

[0010] a cooling medium delivery pipe for delivering cooling medium to the discharge pipe, wherein the cooling medium delivery pipe is connected to the discharge pipe through a connecting hole provided on the discharge pipe,

[0011] A negative pressure member is arranged in the inner cavity of the discharge pipe, and the negative pressure member is used to form a negative pressure area at the connecting hole.

[0012] In one embodiment, the negative pressure member is constructed as a conical tube which is connectedly arranged in the inner cavity of the discharge pipe, and the flow area of ​​the conical tube gradually decreases from the upstream end to the downstream end, wherein the connecting hole is located on the connecting section of the discharge pipe outside the circumference of the conical tube.

[0013] In one embodiment, the discharge pipe includes a first inclined section arranged downstream of the connecting section, the first inclined section, the connecting section and the tapered pipe forming a suction chamber connected to the discharge pipe, wherein the first inclined section is configured to extend toward the radial center of the discharge pipe in a direction from the upstream end to the downstream end.

[0014] In one embodiment, the discharge pipe comprises a second inclined section disposed downstream of the first inclined section, and a flow area of ​​the second inclined section gradually increases from an upstream end to a downstream end.

[0015] In one embodiment, the angle between the wall of the tapered tube and the axial direction of the discharge tube is 20-60 degrees.

[0016] And / or the angle between the wall of the second inclined section and the axial direction of the discharge pipe is 10-30 degrees.

[0017] In one embodiment, a medium replenishing pipeline for connecting with external cooling medium is provided on the cooling medium container, a shut-off valve is provided on the medium replenishing pipeline, and a nitrogen replenishing pipeline for connecting with external nitrogen is provided on the cooling medium container, and the nitrogen replenishing pipeline replenishes nitrogen to the cooling medium container through a single suction valve.

[0018] In one embodiment, in the vertical direction, the lowest point of the cooling medium container is not lower than the discharge pipe, and the highest point of the cooling medium delivery pipeline is not lower than the highest liquid level in the cooling medium container.

[0019] In one embodiment, the cooling medium is one of desalted water, ethyl acetate, toluene and isophorone.

[0020] According to another aspect of the present invention, a discharged material processing system is provided, comprising equipment to be discharged, a discharger, the above-mentioned device for cooling the discharged material, and a gas-liquid separation tank, which are arranged in sequence from the upstream end to the downstream end, wherein the discharge pipe is connected to the downstream end of the discharger.

[0021] In one embodiment, the relief device is configured as a safety valve or a rupture disc.

[0022] Compared with the prior art, the advantages of the present invention are that the device for cooling the discharged materials is applied to the discharged material processing system to cool the discharged materials. When the discharge equipment is required to discharge, the high-flow rate discharged materials are sprayed into the discharge pipe, and then enter the negative pressure part to form a negative pressure area for sucking in the cooling medium. The gravity flow of the cooling medium ensures that the cooling medium can continuously enter the discharge pipe during the discharge process. The high-temperature discharged material and the cooling medium are fully mixed by the shearing action of the high-speed fluid jet, and the temperature of the discharged material is reduced by absorbing heat by the cooling medium. In addition, part of the cooling medium will vaporize during the injection of the high-temperature discharged material, which can quickly absorb heat, thereby improving the cooling efficiency and reducing the amount of cooling medium used. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0024] Figure 1 The disclosed material handling system according to an embodiment of the present invention is schematically shown;

[0025] Figure 2 for Figure 1 Enlarged view of point A.

[0026] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0027] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all the embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0028] The present application provides a device for cooling down discharged materials. The device for cooling down discharged materials is applied in a discharged material processing system to cool down discharged materials.

[0029] like Figure 1 and 2As shown, the discharged material processing system includes a device 1 to be discharged, a discharger 2, a device for cooling the discharged material, and a gas-liquid separation tank 3, which are arranged in sequence from the upstream end to the downstream end. Among them, the device 1 to be discharged can be a reactor, in which a high-energy material reaction is carried out, and when an abnormal operating condition occurs, the pressure therein needs to be discharged. The discharger 2 is arranged at the downstream end of the device 1 to be discharged, and is used to allow the discharged material to enter the device for cooling the discharged material after passing through the discharger 2. Preferably, the discharger 2 is a safety valve or a rupture disc. The device for cooling the discharged material is arranged at the downstream end of the discharger 2, and is mainly used for cooling the discharged material. The gas-liquid separation tank 3 is used to receive the discharged material after the temperature is cooled by the device for cooling the discharged material.

[0030] According to the present application, the device for cooling the discharged material includes a discharge pipe 41, a cooling medium device 42, a cooling medium delivery pipe 43 and a negative pressure member 44. Among them, the upstream end of the discharge pipe 41 is connected to the discharge device 1 through the discharge device 2, and the downstream end is connected to the gas-liquid separation tank 3, which is used to connect the discharge device 1 and the gas-liquid separation tank 3 to transport the discharged material. The cooling medium device 42 itself is in the shape of a container and is used to store the cooling medium 45. The cooling medium delivery pipe 43 is arranged between the cooling medium device 42 and the discharge pipe 41, and is used to transport the cooling medium 45 to the discharge pipe 41. In addition, a connecting hole 46 is arranged on the discharge pipe 41, and the cooling medium delivery pipe 43 is connected to the discharge pipe 41 through the connecting hole 46. The negative pressure member 44 is arranged in the inner cavity of the discharge pipe 41, and is used to form a negative pressure area at the connecting hole 46, so as to suck the cooling medium 45 in the cooling medium device 42 into the discharge pipe 41.

[0031] In a preferred embodiment, the negative pressure member 44 is constructed as a conical tube. The conical tube is connected and arranged in the inner cavity of the discharge pipe 41. Moreover, the flow area of ​​the conical tube gradually decreases from the upstream end to the downstream end. The connecting hole 46 is located on the connecting section 47 of the discharge pipe 41 outside the circumference of the conical tube. The negative pressure member 44 arranged in this way has a simple structure and is easy to implement. When the discharged material passes through the negative pressure member 44, since its flow area becomes smaller successively, the flow rate of the discharged material increases, and a negative pressure is formed at the connecting hole 46, which forms an attraction for the cooling medium 45. The flow capacity of the conical tube should meet the discharge volume required by the discharge device 1. In addition, the cooling medium entering through the connecting hole 46 can act on the outer wall of the conical tube, and enter the discharge pipe 41 under the guidance of the outer wall of the conical tube. In other words, the conical tube also plays a role in draining the cooling medium and avoiding local turbulence.

[0032] In a preferred embodiment, the discharge pipe 41 includes a first inclined section 48. The first inclined section 48 is arranged downstream of the connecting section 47. The first inclined section 48, the connecting section 47 and the tapered tube form a suction chamber 49. The suction chamber 49 is used to communicate with the discharge pipe 41. Due to the negative pressure, the cooling medium 45 is sucked into the suction chamber 49 through the connecting hole 46, and then enters the discharge pipe 41 to mix with the pressure relief material. The first inclined section 48 is configured to extend toward the radial center of the discharge pipe 41 in the direction from the upstream end to the downstream end. By setting the first inclined section 48, the suction chamber 49 is formed, and the outlet where the suction chamber 49 is connected to the discharge pipe 41 becomes narrower, which has the effect of accelerating the flow of the cooling medium, thereby ensuring that the cooling medium and the discharge material are further mixed evenly, and good heat dissipation and cooling are performed.

[0033] The discharge pipe 41 includes a second inclined section 50 disposed downstream of the first inclined section 48. The flow area of ​​the second inclined section 50 gradually increases from the upstream end to the downstream end. The discharged material enters the second inclined section 50, and at the same time, the cooling medium also enters the second inclined section 50 from the suction chamber 49, and the discharged material and the cooling medium are mixed in the second inclined section 50. Through the inclination of the second inclined section 50, the pressure of the fluid therein is reduced, the cooling medium is gasified, and the temperature of the pressure-relieved material is ensured to be reduced.

[0034] In a specific embodiment, the angle between the wall of the conical tube and the axial direction of the discharge pipe 41 is 20-60 degrees, for example, 45 degrees. The angle between the wall of the second inclined section 50 and the axial direction of the discharge pipe 41 is 10-30 degrees, for example, 20 degrees. It can be seen that the inclination of the conical tube is relatively large, which helps to speed up the discharged material, jet, and then generate a negative pressure zone. The inclination of the second inclined section 50 is relatively small, which can make the discharged material and the cooling medium fully mixed and uniform.

[0035] A medium replenishing pipeline 51 is provided on the cooling medium container 42 for connecting to an external cooling medium source so as to input and replenish the cooling medium 45 for the cooling medium container 42. A stop valve 52 is provided on the medium replenishing pipeline 51 for controlling the opening and closing of the medium replenishing pipeline 51. A nitrogen replenishing pipeline 53 is provided on the cooling medium container 42 for connecting to external nitrogen. The nitrogen replenishing pipeline 53 replenishes nitrogen to the cooling medium container 42 through a single suction valve 54. During use, a fixed amount of cooling medium 45 is stored in the cooling medium container 42, and as the cooling medium 45 is transported into the discharge pipe 41, nitrogen is transported into the cooling medium container 42 through the nitrogen replenishing pipeline 53 to avoid negative pressure in the cooling medium container 42. During the transportation process, nitrogen enters the cooling medium container 42 through the single suction valve 54. It can be seen that in the process of supplying the cooling medium to the discharge pipe 41, nitrogen is transported to supplement the pressure of the cooling medium container 42, not the cooling medium. That is to say, the stop valve 52 on the medium replenishment pipe 51 in the cooling medium storage tank 42 is opened only when the cooling medium 45 is intermittently replenished in the cooling medium storage tank 42. The stop valve 52 on the medium replenishment pipe 51 is always in a closed state when the material in the discharge equipment 1 needs to be discharged. This method can not only avoid the formation of negative pressure in the cooling medium container 42 by replenishing nitrogen, but also control the amount of cooling medium to avoid excessive cooling medium from entering the discharge pipe 41, and further avoid the cooling medium from entering the gas-liquid separation tank 3 through the discharge pipe 41.

[0036] According to the present application, in the vertical direction, the lowest point of the cooling medium container 42 is not lower than the discharge pipe 41. The highest point of the cooling medium delivery pipeline 43 is not lower than the highest liquid level in the cooling medium container. Through the above arrangement, the cooling medium can flow to the discharge pipe 41 only when the pressure relief device 2 is opened and a negative pressure is formed in the inner cavity of the discharge pipe 41.

[0037] According to the present application, the cooling medium 45 should be non-toxic, harmless, have a large latent heat of vaporization, and be compatible with the discharged material. For example, the cooling medium 45 can be one of desalted water, ethyl acetate, toluene, and isophorone.

[0038] According to the following Figure 1 and 2 Describe the working process of the released material handling system in detail.

[0039] When the high-energy material reacts in the device 1 to be discharged and an abnormal operating condition occurs, the pressure therein needs to be discharged. Since the pressure of the device 1 to be discharged reaches the opening pressure of the discharger 2, the discharger 2 opens, and the discharged material passes through the discharger 2 and reaches the negative pressure part 44. In the process of the discharged material passing through the negative pressure part 44, the discharged material is compressed and accelerated, and the pressure energy is converted into kinetic energy, and a certain negative pressure area is formed in the suction chamber 49. Under the action of suction pressure, the cooling medium 45 stored in the cooling medium storage tank 42 is sucked into the suction chamber 49 through the cooling medium delivery pipeline 43. The cooling medium 45 in the suction chamber 49 relies on the injection action and gravity self-flow action, and continues to accelerate through the first inclined section 48, enters the second inclined section 50 and is evenly mixed with the high-temperature discharged material. Due to the injection action and direct uniform contact heat exchange in the second inclined section 50, the cooling medium 45 will vaporize and absorb heat, thereby realizing rapid cooling of the high-temperature discharged material. The cooled discharged material enters the gas-liquid separation tank 3 through the discharge pipe 41.

[0040] By arranging a device for cooling the discharged material between the equipment to be discharged 1 and the gas-liquid separation tank 3, the material discharge processing system of the present application can be suitable for safe discharge conditions where the maximum temperature of the discharged material is not less than 250°C and the discharge pressure is 3-10 barG under abnormal conditions.

[0041] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and / or modifications that fall within the scope of the present invention, and changes and / or modifications made according to the embodiments of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for cooling discharged materials, characterized in that: include: A discharge pipe, wherein the upstream end of the discharge pipe is connected to the equipment to be discharged and the downstream end is connected to the gas-liquid separation tank, a cooling medium container storing a cooling medium, a cooling medium delivery pipe for delivering cooling medium to the discharge pipe, wherein the cooling medium delivery pipe is connected to the discharge pipe through a connecting hole provided on the discharge pipe, A negative pressure member is arranged in the inner cavity of the discharge pipe, the negative pressure member is used to form a negative pressure area at the communicating hole, the negative pressure member is constructed as a conical tube arranged in the inner cavity of the discharge pipe in a communicating manner, the flow area of ​​the conical tube gradually decreases from the upstream end to the downstream end, wherein the communicating hole is located on the communicating section of the discharge pipe outside the circumference of the conical tube.

2. The device for cooling discharged materials according to claim 1, characterized in that: The discharge pipe includes a first inclined section arranged downstream of the connecting section, the first inclined section, the connecting section and the tapered pipe forming a suction chamber connected to the discharge pipe, wherein the first inclined section is configured to extend toward a radial center of the discharge pipe in a direction from an upstream end to a downstream end.

3. The device for cooling discharged materials according to claim 2, characterized in that: The discharge pipe comprises a second inclined section arranged downstream of the first inclined section, and a flow area of ​​the second inclined section gradually increases from an upstream end to a downstream end.

4. The device for cooling discharged materials according to claim 3, characterized in that: The angle between the wall of the tapered tube and the axial direction of the discharge pipe is 20-60 degrees. And / or the angle between the wall of the second inclined section and the axial direction of the discharge pipe is 10-30 degrees.

5. The device for cooling discharged materials according to any one of claims 1 to 4, characterized in that: A medium replenishing pipeline for connecting with external cooling medium is arranged on the cooling medium container, a shut-off valve is arranged on the medium replenishing pipeline, and a nitrogen replenishing pipeline for connecting with external nitrogen is arranged on the cooling medium container, and the nitrogen replenishing pipeline replenishes nitrogen to the cooling medium container through a single suction valve.

6. The device for cooling discharged materials according to any one of claims 1 to 4, characterized in that: In the vertical direction, the lowest point of the cooling medium container is not lower than the discharge pipe, and the highest point of the cooling medium delivery pipeline is not lower than the highest liquid level in the cooling medium container.

7. The device for cooling discharged materials according to any one of claims 1 to 4, characterized in that: The cooling medium is one of desalted water, ethyl acetate, toluene and isophorone.

8. A discharge material treatment system, characterized in that: It comprises equipment to be discharged, a discharger, a device for cooling discharged materials according to any one of claims 1 to 7, and a gas-liquid separation tank, which are arranged in sequence from the upstream end to the downstream end, wherein the discharge pipe is connected to the downstream end of the discharger.

9. The discharge material processing system according to claim 8, characterized in that: The releaser is configured as a safety valve or a rupture disc.

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