Mixing device and coal chemical hydrogen production system

Abstract

The present application relates to the field of coal chemical device, disclose a kind of mixing device and a kind of coal chemical hydrogen production system.The mixing device includes first pipeline (1), spin mixes internal part, blocking piece (3);The first pipeline has first pipeline inlet (11), auxiliary material port (13), first pipeline outlet (12), the auxiliary material port and the first pipeline inlet are perpendicular to each other;The blocking piece (3) is fixedly installed in the inner wall of the first pipeline close to the first pipeline outlet;The spin mixes internal part is located in the first pipeline between the auxiliary material port and the blocking piece, the spin mixes internal part includes multiple spin vane (2) being sequentially connected in series along the length direction of the first pipeline and forming curve channel extending along the first pipeline.The mixing device can effectively slow down pipeline fouling;Improve mixing effect;Effectively slow down mixer blockage;And realize on-line replacement of mixer internal part, maintenance is convenient and fast;Ensure normal operation of production during maintenance.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of coal chemical device, in particular to a mixing device and a coal chemical hydrogen production system. BACKGROUND

[0002] The coal coke hydrogen production device is to produce high-quality hydrogen gas meeting the requirements of downstream production device by gasifying solid raw material into gaseous state and then through a series of process. In the gasification process, coal, petroleum coke and oxygen are reacted in the gasifier to generate high-temperature and high-pressure crude synthesis gas, which is then transported to the purification system after preliminary deslagging and dewatering treatment, and then through sulfur-tolerant shift, acid gas removal and methanation, and finally the qualified product hydrogen gas is produced and sent to the downstream user after being pressurized. The gasifier, cyclone separator and high-pressure black water of the scrubbing tower of the gasification system have a large amount of dissolved acid gas. When the black water passes through the high-pressure flash valve, the partial pressure of each component in the gas phase rapidly decreases due to the sudden decrease in pressure after the valve, and at a certain temperature, the acid gas dissolved in the water escapes the water surface, i.e. flash evaporation. The gas and liquid phases are separated in the separator, with the gas phase being the top product and the liquid phase being the bottom product.

[0003] In this process, the high-pressure black water of the gasifier, cyclone separator and scrubbing tower of the gasification system of the coal coke hydrogen production device is sequentially flashed by high flash, low flash and true flash, and the liquid phase black water flows from the bottom of the vacuum flash evaporator to the flocculant mixer. To accelerate the settling rate of solids in the settling tank, a flocculant is added to the system, and the black water and the flocculant are mixed and then flow into the settling tank. When the black water flows through the existing mixer to the settling tank, the inner part of the mixer in the prior art is arranged in the radial direction of the pipeline in a woven manner. The inner part of the mixer in this structure almost covers the entire cross section of the pipeline, and the medium flows through the gaps between the inner part of the mixer. The mixing effect of the black water and the flocculant is different, and after long-term operation of the gasification system, the system is obviously scaled, and the scale pieces are easy to fall off and block the inner part of the mixer, which greatly affects the water system balance. SUMMARY

[0004] The present application aims to overcome the problems of easy blocking of the inner part of the mixer and poor mixing effect in the prior art, and provides a mixing device and a coal chemical hydrogen production system. The mixing device can effectively slow down the scaling of the pipeline, improve the mixing effect, effectively slow down the blocking of the mixer, and realize online replacement of the inner part of the mixer, which is convenient and fast for maintenance and repair, and ensures the normal operation of production during maintenance and repair.

[0005] To achieve the above-mentioned purpose, the present application provides a mixing device, which comprises a first pipeline, a rotating mixing inner part and a blocking part.

[0006] The first pipeline is a straight pipeline with a first pipeline inlet, an auxiliary material port, and a first pipeline outlet. The first pipeline inlet and the first pipeline outlet are located at two ends of the first pipeline, respectively. The auxiliary material port is located on the first pipeline close to the first pipeline inlet and perpendicular to the first pipeline inlet.

[0007] The blocking piece is fixedly installed on the inner wall of the first pipeline close to the first pipeline outlet.

[0008] The rotating mixing inner piece is located in the first pipeline between the auxiliary material port and the blocking piece. The rotating mixing inner piece includes a plurality of rotating flow pieces arranged in series along the length direction of the first pipeline to form a curved channel extending along the first pipeline.

[0009] Optionally, the curved channel is an S-shaped curved channel extending along the length direction of the first pipeline.

[0010] Optionally, the rotating flow piece has a twisted X-shaped streamline structure.

[0011] Optionally, the number of rotating flow pieces is at least six.

[0012] Optionally, the blocking piece is an annular baffle coaxially arranged with the first pipeline. The inner diameter of the annular baffle is smaller than the inner diameter of the first pipeline.

[0013] Optionally, the blocking piece is two blocking pieces arranged on the inner wall of the first pipeline, respectively.

[0014] Optionally, the mixing device further includes a second pipeline with a second pipeline inlet and a second pipeline outlet.

[0015] The first pipeline is further provided with a first branch port close to the auxiliary material port and a second branch port close to the first pipeline outlet. The first branch port and the second branch port are located on the first pipeline between the auxiliary material port and the first pipeline outlet, and both the first branch port and the second branch port are perpendicular to the first pipeline inlet.

[0016] The second pipeline inlet is connected to the first branch port, and the second pipeline outlet is connected to the second branch port.

[0017] A control valve is arranged between the second pipeline inlet and the first branch port, and a control valve is arranged between the second pipeline outlet and the second branch port.

[0018] Optionally, a detachable flange is arranged in the middle section of the first pipeline.

[0019] Optionally, the detachable flange is arranged on the first pipeline between the first branch port and the second branch port.

[0020] Another aspect of the present application provides a coal chemical hydrogen production system comprising the mixing device described above.

[0021] Through the technical solution described above, the mixing device of the present application can effectively slow down the pipe fouling, improve the mixing effect, effectively slow down the mixer blockage, and realize online replacement of the mixer internals, so that the maintenance is convenient and fast, and the normal operation of production is ensured during maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of the mixing device of an embodiment of the present application;

[0023] Figure 2 is an axonometric view of a single swirl vane of an embodiment of the present application;

[0024] Figure 3 is an axonometric view of six swirl vanes connected in series of an embodiment of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1 first pipeline 11 first pipeline inlet

[0027] 12 first pipeline outlet 13 auxiliary material port

[0028] 14 first branch port 15 second branch port

[0029] 2 swirl vane 3 blocking piece

[0030] 4 second pipeline 41 second pipeline inlet

[0031] 42 second pipeline outlet 5 detachable flange DETAILED DESCRIPTION

[0032] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0033] In the present application, it should be noted that, without being stated otherwise, "up", "down", "left", "right", etc. are only used to represent relative positional relationships, "up" and "down" generally refer to the up and down shown in the reference drawings; "inner" and "outer" generally refer to the inner and outer relative to the contour of each component; when the absolute position of the described object changes, the relative positional relationship may change. Relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Therefore, it should not be understood as a limitation on the present application.

[0034] The present invention provides a mixing device, including a first pipeline 1, a swirling mixing internal component, and a baffle 3;

[0035] The first pipeline 1 is a straight pipe with a first pipeline inlet 11, an auxiliary material outlet 13, and a first pipeline outlet 12. The first pipeline inlet 11 and the first pipeline outlet 12 are located at the two ends of the first pipeline 1, respectively. The auxiliary material outlet 13 is located in the first pipeline 1 close to the first pipeline inlet 11 and is perpendicular to the first pipeline inlet 11.

[0036] The baffle 3 is fixedly installed on the inner wall of the first pipeline 1 near the outlet 12 of the first pipeline;

[0037] The swirling mixing internal is located in the first pipeline 1 between the auxiliary material port 13 and the baffle 3. The swirling mixing internal includes multiple swirl vanes 2 that are arranged in series along the length of the first pipeline 1 to form a curved channel extending along the first pipeline 1.

[0038] The specific mixing process is as follows: The following explanation uses black water as an example. Black water with a certain flow rate flows from inlet 11 of the first pipe into the first pipe 1 (see appendix). Figure 1 Flocculant (e.g., polyacrylamide flocculant) is introduced into the first pipeline 1 from the auxiliary material port 13. After mixing with the flowing black water, it flows forward together. After being mixed by the swirling internals, it finally flows out from the outlet 12 of the first pipeline to the sedimentation tank for sedimentation. The stop 3, fixedly installed at the outlet 12 of the first pipeline, limits the swirling mixing internals, preventing them from being swept out of the first pipeline 1 by the impact of the flowing black water. When the mixture of black water and flocculant flows through multiple swirling vanes 2 connected in series, it swirls forward under the guidance of the vanes 2. During the swirling forward process, the black water flows in a curved shape, and the fluid flow forms a rotating flow field, which increases the contact between the flocculant and the black water, and improves the mixing effect of the two. Multiple swirling vanes 2 are welded together in series along the length of the first pipeline 1, which not only extends the flow path of the swirling mixture of black water and flocculant, but also improves the mixing effect. The curved channel set and extended along the length of the first pipeline 1 does not affect the radial flow area of ​​the pipe, ensuring the pipe's throughput and reducing the blockage of the mixing device.

[0039] The curved channel can have various forms, and specifically, the preferred curved channel here is an interlaced S-shaped curved channel extending along the length direction of the first pipeline 1. The S-shaped channel not only makes the channel smooth and streamlined, reduces the flow resistance, and facilitates the mixing of the black water and the flocculant, but also enables the mixture of the black water and the flocculant to have multiple paths from the inlet of the first pipeline 1 to the outlet of the first pipeline 1. The interlaced S-shaped channel also produces certain up-and-down fluid disturbance to the black water and the flocculant, which is equivalent to a stirring and mixing effect, and is more conducive to the mixing of the black water and the flocculant, further improving the mixing efficiency.

[0040] The structure of the cyclone sheet 2 can be various, as long as it can form a curved channel extending along the length direction of the first pipeline 1 after being sequentially connected in series. Referring to the attached Figure 2 The cyclone sheet 2 used in the preferred embodiment here has a twisted X-shaped streamlined structure. This streamlined structure not only reduces the flow resistance of the black water with a certain flow rate, but also ensures that the flow area in the radial direction of the first pipeline 1 is met, without affecting the flow rate. At the same time, the X-shaped streamlined structure forms an interlaced S-shaped curved flow channel, so that the mixture of the black water and the flocculant travels a mixing distance greater than the length of the first pipeline 1 in the first pipeline 1, prolongs the mixing distance of the black water and the flocculant, and improves the mixing effect. The streamlined structure also reduces the flow resistance of the fluid. Furthermore, the X-shaped structure causes the mixture of the black water and the flocculant to have a height difference from high to low, transition from low to high, and then transition from high to low, and the process is repeated, which plays a role in mixing the mixture of the black water and the flocculant in the up-and-down fluctuation flow.

[0041] The twist angle and the number of the cyclone sheet 2 can be adjusted adaptively according to specific conditions (for example, the twist angle of the cyclone sheet 2 is set to 90°-1080°). Referring to the attached Figure 3 The number of the cyclone sheet 2 is at least six, which can make the mixture of the black water and the flocculant flow through multiple cyclone sheets 2, have a long flow mixing distance, and have a long mixing time, so that the two can be fully mixed to achieve a good mixing effect.

[0042] Specifically, the material of the cyclone sheet 2 is a wear-resistant and corrosion-resistant material, and the material meeting the requirements can be selected according to the properties of the flowing fluid or medium and the working conditions. Here, the material of the cyclone sheet 2 used in the preferred embodiment is 316 stainless steel.

[0043] Preferably, the stopper 3 is an annular baffle, and is coaxially arranged with the first pipeline 1, and the inner diameter of the annular baffle is smaller than the inner diameter of the first pipeline 1. The annular baffle has a through hole, and is vertically welded to the inner wall of the first pipeline 1 near the first pipeline outlet 12, and is coaxially arranged with the first pipeline 1. The annular baffle has the effects of preventing the rotary mixing inner part from sliding out of the first pipeline 1, and providing a passage for fluid flow, so as to facilitate the mixed medium to flow out of the mixing device.

[0044] Alternatively, the stopper 3 can also be two small stop blocks, and the two stop blocks are arranged on the inner wall of the first pipeline 1, i.e. are welded to the inner wall of the first pipeline 1 near the first pipeline outlet 12. The stopper 3 can also be other structures, as long as the structures can prevent the rotary mixing inner part from sliding out of the first pipeline 1 and provide a passage for fluid flow.

[0045] Specifically, the mixing device further comprises a second pipeline 4, and the second pipeline 4 has a second pipeline inlet 41 and a second pipeline outlet 42.

[0046] The first pipeline 1 is further provided with a first branch 14 near the auxiliary material port 13 and a second branch 15 near the first pipeline outlet 12, and the first branch 14 and the second branch 15 are located on the first pipeline 1 between the auxiliary material port 13 and the first pipeline outlet 12, and the first branch 14 and the second branch 15 are both perpendicular to the first pipeline inlet 11.

[0047] The second pipeline inlet 41 is connected with the first branch 14, and the second pipeline outlet 42 is connected with the second branch 15.

[0048] A control valve is arranged between the second pipeline inlet 41 and the first branch 14, and a control valve is arranged between the second pipeline outlet 42 and the second branch 15.

[0049] When the first pipeline 1 is blocked in the mixing device operation, the switching to the second pipeline 4 can be continued for a short time by controlling the valve, without the need for large parameter adjustment of the previous process system of the mixing device, and without the need for shutdown and production stop; in addition, if the flow fluid or medium is found to have large fluctuation, the second pipeline 4 can be used for flow adjustment to control the flow balance of the medium in the whole working condition; at the same time, the scale blockage of the rotating mixing inner part is prevented; and the mixing degree can be adjusted according to different working conditions, for example, if the black water and the flocculating agent are mixed through the rotating mixing inner part of the first pipeline 1, the flocculation and precipitation effect can reach 90%, but the next process only needs to mix the flocculation and precipitation to 70% of the fluid, and does not need 90% of the high quality precipitation effect, then a part of the black water can flow through the second pipeline 4 by opening the control valve, without participating in the rotating flow mixing, and finally merged into the first pipeline 1 through the second pipeline outlet 42, so that the medium flowing out of the first pipeline outlet 12 meets the requirements of the next process, so that the energy is optimized and not wasted.

[0050] Specifically, the middle section of the first pipeline 1 is provided with a detachable flange 5. For example, the length of the first pipeline 1 is 2500mm, and the detachable flange 5 facilitates the separation of the first pipeline 1, the observation of the scale and wear and tear of the first pipeline 1, and the blockage condition; the detachable flange 5 is installed on the first pipeline 1, which facilitates the detachment of the detachable flange 5 from the first pipeline 1, and further facilitates the removal or replacement of the rotating flow inner part.

[0051] Preferably, the detachable flange 5 is located on the first pipeline 1 between the first branch 14 and the second branch 15, when the first pipeline 1 is blocked and needs to be repaired, the second pipeline 4 can be switched to continue operation for a short time, and when the opportunity is appropriate, the detachable flange 5 is detached, and then the rotating flow inner part is removed from the first pipeline 1 for repair or replacement, without the need for immediate shutdown and production stop to repair the device and replace the rotating flow inner part, etc., ensuring the normal operation of the working condition. Specifically, the first pipeline 1 on the left and right sides of the detachable flange 5 has a rotating flow piece 2.

[0052] The mixing device of the application slows down the blockage by setting the rotating flow pieces in series, improves the mixing effect, and realizes short-time switching to the second pipeline to ensure the operation of the mixing device when the first pipeline is blocked, without the need for large parameter adjustment of the previous system of the mixing device; and when the system working condition fluctuates greatly, the second pipeline is adjusted for flow distribution to control the water balance of the system, while preventing scale blockage of the rotating mixing inner part; and the detachable flange is provided to realize online repair and replacement of the rotating mixing inner part, without the need for overall replacement of the mixing device, ensuring the normal operation of the working condition.

[0053] Another aspect of the present application provides a coal chemical hydrogen production system comprising the mixing device described above. Since the mixing device in the above embodiment has the effects described above, the coal chemical hydrogen production system according to the embodiment of the present application also has corresponding technical effects, i.e., slowing down the plugging and improving the mixing effect; when the first pipeline is plugged, the system can be switched to the second pipeline for a short time to ensure the operation of the mixing device, without the need for large parameter adjustment of the system before the mixing device; moreover, when the system operating condition fluctuates greatly, the second pipeline is adjusted for shunting to control the water balance of the system and prevent scale pieces from plugging the internal components of the rotary mixer; the detachable flange is provided to realize online maintenance and online replacement of the internal components of the rotary mixer, without the need for overall replacement of the mixing device, thereby ensuring the normal operation of the operating condition; this coal chemical hydrogen production system can effectively reduce the impact of plugging on the water balance when the black water from the flash evaporation system is discharged to the sedimentation tank, can realize online replacement of the internal components, and can improve the mixing effect; and can meet the needs of the petroleum and chemical industries.

[0054] The preferred embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited thereto. Within the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present application will not describe various possible combination manners again. However, these simple modifications and combinations should also be regarded as the disclosed content of the present application and belong to the protection scope of the present application.

Claims

1. A mixing device, characterized in that, Includes the first pipeline (1), swirling internals, and baffle (3); The first pipeline (1) is a straight pipe with a first pipeline inlet (11), an auxiliary material outlet (13) and a first pipeline outlet (12). The first pipeline inlet (11) and the first pipeline outlet (12) are located at the two ends of the first pipeline (1), respectively. The auxiliary material outlet (13) is located in the first pipeline (1) near the first pipeline inlet (11) and is perpendicular to the first pipeline inlet (11). The baffle (3) is fixedly installed on the inner wall of the first pipeline (1) near the outlet (12) of the first pipeline. The baffle (3) limits the swirling internals and prevents the swirling internals located in the first pipeline (1) from being pushed out of the first pipeline (1) by the impact of the fluid flow. The swirling mixing internal is located within the first pipeline (1) between the auxiliary material inlet (13) and the baffle (3). The swirling mixing internal includes a plurality of swirl vanes (2) arranged sequentially in series along the length of the first pipeline (1) to form a curved channel extending along the first pipeline (1); and The mixing device further includes a second pipeline (4), which has a second pipeline inlet (41) and a second pipeline outlet (42). The first pipeline (1) is also provided with a first branch (14) near the auxiliary material port (13) and a second branch (15) near the outlet (12) of the first pipeline. The first branch (14) and the second branch (15) are located on the first pipeline (1) between the auxiliary material port (13) and the outlet (12) of the first pipeline. The inlet (41) of the second pipeline is connected to the first branch (14), and the outlet (42) of the second pipeline is connected to the second branch (15). A control valve is provided between the second pipeline inlet (41) and the first branch port (14), and a control valve is provided between the second pipeline outlet (42) and the second branch port (15).

2. The mixing device according to claim 1, characterized in that, The curved channel is an S-shaped curved channel that extends interlaced along the length direction of the first pipeline (1).

3. The mixing device according to claim 2, characterized in that, The swirl vane (2) has a twisted X-shaped streamline structure.

4. The mixing apparatus according to claim 3, characterized in that, The number of the swirl vanes (2) is at least six.

5. The mixing apparatus according to claim 1, characterized in that, The baffle (3) is an annular baffle and is coaxially arranged with the first pipeline (1). The inner diameter of the annular baffle is smaller than the inner diameter of the first pipeline (1).

6. The mixing apparatus according to claim 1, characterized in that, The baffle (3) consists of two baffles, which are respectively disposed on the inner wall of the first pipeline (1).

7. The mixing apparatus according to claim 1, characterized in that, The first branch (14) and the second branch (15) are both perpendicular to the first pipeline inlet (11).

8. The mixing apparatus according to claim 1, characterized in that, The first pipeline (1) is provided with a detachable flange (5) in the middle section.

9. The mixing apparatus according to claim 8, characterized in that, The detachable flange (5) is located on the first pipeline (1) between the first branch (14) and the second branch (15).

10. A coal chemical hydrogen production system, characterized in that, Includes the mixing device according to any one of claims 1-9.

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