Dry quenching steam efficient heat exchange and temperature reduction device for methanol conversion process

Abstract

The utility model relates to the technical field of heat exchange and temperature reduction devices, and discloses a dry quenching steam efficient heat exchange and temperature reduction device for a methanol conversion procedure, which comprises a spray pipe, a connecting cover is welded at the top of the spray pipe, a bolt is arranged at the top of the connecting cover, and one end of the inner wall of the bolt is in threaded connection with a threaded rod. The output end of the bottom of the threaded rod extends to one end of the inner wall of the connecting cover, the bottom of the threaded rod is fixedly connected with a pressing piece, the bottom of the pressing piece is fixedly connected with a spring, the output end of the bottom of the spring is fixedly connected with a piston piece, and the outer side wall of the piston piece is in sliding fit with the inner wall of the spray pipe. The flow of the desuperheating water is accurately controlled, then the steam temperature is accurately adjusted, the unique threaded rod and piston piece linkage structure can flexibly change the flow area of the narrow channel, the nozzle is matched for atomizing the desuperheating water, the heat exchange efficiency is improved, the stable operation of the methanol conversion procedure is guaranteed, the energy consumption and the maintenance cost are reduced, and the device is more practical.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchange temperature reducing device technical field, specifically is a kind of dry quenching steam efficient heat exchange temperature reducing device for methanol conversion process. BACKGROUND

[0002] In methanol conversion process, dry quenching steam plays a vital role. Dry quenching technology is an advanced quenching process, which uses inert gas to exchange heat with red-hot coke in the dry quenching furnace. The heat released by red coke during the cooling process is absorbed by inert gas, and then these inert gases carrying heat pass through the waste heat boiler to transfer heat to the water in the boiler, thereby generating a large amount of medium-pressure superheated steam. These dry quenching steam has high temperature and pressure, and contains abundant heat energy. Methanol conversion process is a complex chemical reaction process, which requires specific temperature and pressure conditions. If the temperature of superheated steam is too high, it may cause damage to the equipment if used directly in methanol conversion process, and it is also not conducive to the precise control of the reaction. Therefore, dry quenching steam needs to be temperature-reduced to reach the appropriate temperature and pressure range to meet the requirements of methanol conversion process. By using efficient heat exchange temperature reducing device to treat dry quenching steam, not only the utilization efficiency of steam can be improved, but also the stable operation of methanol conversion process can be ensured, the product quality and production efficiency can be improved. In traditional process, when starting up, coking gas boiler is needed to produce steam for temperature rising and starting up, and the conversion temperature rising time is long, and the steam pressure produced by gas boiler is 1.2 MPa (steam pressure value is barely sufficient for the use of conversion device), according to normal production design process, the starting-up time of alcohol-ammonia system needs nearly 70 hours.

[0003] Traditional dry quenching steam temperature reduction technology has many shortcomings. In terms of temperature reduction accuracy, traditional devices often have difficulty in accurately controlling the temperature of steam. The adjustment range is limited, and the change of steam temperature under different working conditions cannot be adjusted in time and accurately, resulting in large fluctuations in the temperature of steam entering the methanol conversion process. This not only affects the rate and balance of chemical reaction, but also may cause side reactions, reducing the yield and purity of methanol. In terms of equipment reliability, the structural design of traditional temperature reduction device is not reasonable, and wear and failure may occur between components. For example, the nozzles of some devices are prone to blockage, affecting the atomization effect of temperature reduction water, resulting in uneven temperature reduction; the sealing performance of regulating valve is poor, which may cause temperature reduction water leakage, not only wasting water resources, but also increasing the maintenance cost of equipment. In addition, the heat exchange efficiency of traditional device is low, and the heat of dry quenching steam cannot be fully utilized, causing certain energy waste. These shortcomings seriously affect the stable operation of methanol conversion process, increase production cost, and reduce the economic benefit and market competitiveness of enterprises. Therefore, we propose a dry quenching steam efficient heat exchange temperature reducing device for methanol conversion process. SUMMARY

[0004] In view of the defects of the prior art, the dry quenching steam efficient heat exchange and temperature reducing device for methanol conversion process is provided, which solves the above problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme: a dry quenching steam efficient heat exchange and temperature reducing device for methanol conversion process, including the spray pipe, the spray pipe top is welded with the connecting cover, the connecting cover top is equipped with the bolt, the bolt inner wall one end is connected with the threaded rod, the threaded rod bottom output end extends to the connecting cover inner wall one end, the threaded rod bottom fixedly connected with the pressure piece, the pressure piece bottom fixedly connected with the spring, the spring bottom output end fixedly connected with the piston piece, the piston piece outer wall and the spray pipe inner wall are slidingly connected.

[0006] Preferably, the piston piece bottom fixedly connected with the adjusting baffle, the spray pipe one side outer wall is equipped with the input, the input output end extends to the spray pipe inner wall one end.

[0007] Preferably, the spray pipe inner wall is equipped with wide channel away from the input side, and the wide channel is located below the input.

[0008] Preferably, the spray pipe is equipped with the output on the outer wall close to the wide channel side, and the output is communicated with the wide channel.

[0009] Preferably, the spray pipe is equipped with the narrow channel on the inner wall close to the output side, and the narrow channel is located above the output, the narrow channel is communicated with the output, the narrow channel input end is in contact with the piston piece outer wall, and the output one end inner wall is equipped with the nozzle.

[0010] Preferably, the threaded rod top output end extends to the bolt top, and the threaded rod top output end is fixedly connected with the handle.

[0011] Preferably, the output one side output end is fixedly connected with the protection tube, and the protection tube is fixedly connected with the single seat adjusting valve away from the output side.

[0012] Compared with the prior art, the dry quenching steam efficient heat exchange and temperature reducing device for methanol conversion process has the following beneficial effects:

[0013] 1、The methanol conversion process with dry quenching steam efficient heat exchange temperature reducing device, compared with the traditional temperature reducing technology, the methanol conversion process with dry quenching steam efficient heat exchange temperature reducing device is excellent in temperature control. The traditional device is difficult to accurately adapt to the change of steam temperature under different working conditions due to the limited adjustment range, resulting in large fluctuation of steam temperature entering the methanol conversion process, which seriously affects the rate and equilibrium of chemical reaction, and thus reduces the yield and purity of methanol. While the device through the unique thread rod-piston piece linkage structure, the operator can adjust the piston piece position flexibly by means of the rotating handle, accurately change the narrow channel flow area, so as to realize the fine control of the temperature reducing water flow. The temperature reducing water is atomized by the nozzle and fully mixed with the steam, which can quickly adjust the steam temperature to the set value with very small fluctuation range. This precise temperature control capability creates a stable temperature environment for methanol conversion reaction, so that the reaction can proceed according to the predetermined path, effectively avoids the occurrence of side reactions, significantly improves the yield and purity of methanol, and improves the product quality and market competitiveness.

[0014] 2、The methanol conversion process with dry quenching steam efficient heat exchange temperature reducing device, compared with the traditional temperature reducing device, the heat exchange efficiency is low, which cannot fully utilize the heat of dry quenching steam, resulting in a lot of energy waste and increasing the production cost. The device is optimized in heat exchange design, the wide channel and narrow channel in the nozzle cooperate with each other to provide sufficient contact space and reasonable flow path for temperature reducing water and steam. The temperature reducing water accumulates pressure and speed in the wide channel, and after entering the narrow channel, it carries out efficient heat exchange with the steam, fully absorbing the heat of the steam. At the same time, the protection tube and single seat regulating valve further guarantee the stable injection and accurate adjustment of the temperature reducing water, and improve the heat exchange efficiency. Through this efficient heat exchange, the device can maximize the utilization of the heat of dry quenching steam, reducing the input of additional energy. Compared with the traditional device, it can significantly reduce energy consumption, reduce production cost and improve the economic benefit of enterprises. In addition, efficient heat exchange can also reduce the thermal stress of equipment, prolong the service life of equipment and reduce the equipment maintenance cost.

[0015] 3、The methanol conversion process uses dry quenching steam to exchange heat and reduce temperature efficiently. Compared with the traditional temperature reducing device, the structure design is unreasonable, and the parts are prone to wear and failure, such as nozzle blockage, regulating valve leakage and other problems, which not only affects the temperature reducing effect, but also increases the maintenance cost and production downtime of the equipment. The device fully considers the reliability and stability in the structure design, adopts a spiral annular adjustable nozzle and a spring adjustable atomizing nozzle, avoids the influence of steam pipeline vibration on the regulating valve actuator of the temperature reducing water, and prevents water spraying failure. At the same time, the temperature reducing water regulating valve body is not washed by the temperature reducing water, and has a longer service life. In addition, the overall structure of the device is compact, the connection between the parts is firm, and the failure caused by looseness and wear is reduced. This reliable design enables the device to operate stably for a long time, reduces the frequency of failure, reduces the maintenance cost and production downtime, and improves the production efficiency and economic benefit of the enterprise. Compared with the traditional device, the device has obvious advantages in reliability and maintenance cost, and can provide strong guarantee for the continuous production of the enterprise. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a structural schematic diagram of the utility model;

[0017] Fig. 2 It is a schematic diagram of the nozzle section of the utility model;

[0018] Fig. 3 It is a schematic diagram of the connecting cover section of the utility model.

[0019] In the figure: 1, nozzle; 2, connecting cover; 3, bolt; 4, threaded rod; 5, pressing sheet; 6, spring; 7, piston sheet; 8, adjusting stop column; 9, input port; 10, wide channel; 11, output port; 12, narrow channel; 13, handle; 14, nozzle; 15, protection pipe; 16, single seat regulating valve. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] Please refer to Figs. 1-3The utility model provides a kind of dry quenching steam high-efficiency heat exchange temperature reducing device for methanol conversion process, including spray pipe 1, spray pipe 1 top is welded with connecting cover 2, connecting cover 2 top is equipped with bolt 3, the inner wall one end of bolt 3 is threadedly connected with threaded rod 4, threaded rod 4 bottom output end extends to the inner wall one end of connecting cover 2, threaded rod 4 bottom is fixedly connected with pressing sheet 5, pressing sheet 5 bottom is fixedly connected with spring 6, spring 6 bottom output end is fixedly connected with piston sheet 7, piston sheet 7 outer lateral wall and spray pipe 1 inner wall are sliding fit, so that the rotation of threaded rod 4 can drive pressing sheet 5 and piston sheet 7 do linear motion in spray pipe 1, spring 6 is buffer and reset function, provide basic mechanical structure for subsequent regulation temperature reducing water flow.

[0022] Further, piston sheet 7 bottom is fixedly connected with adjusting baffle column 8, spray pipe 1 one side outer wall is equipped with input 9, input 9 output end extends to the inner wall one end of spray pipe 1, adjusting baffle column 8 is connected with piston sheet 7, can move along with piston sheet 7, input 9 provides passageway for temperature reducing water to enter spray pipe 1, the position change of adjusting baffle column 8 can influence the flow path and flow of temperature reducing water after entering from input 9.

[0023] Further, the inner wall of spray pipe 1 is provided with a wide channel 10 away from the input 9 side, the wide channel 10 is located below the input 9, and the wide channel 10 provides a larger flow space for the temperature reducing water, so that the temperature reducing water can accumulate certain pressure and speed during the flow process, which is beneficial to subsequent full heat exchange with steam.

[0024] Further, the outer wall of the spray pipe 1 is provided with an output port 11 near the wide channel 10 side, the output port 11 is communicated with the wide channel 10, the output port 11 provides a passageway for the temperature reducing water to flow out of the spray pipe 1, so that the temperature reducing water accumulated with pressure and speed in the wide channel 10 can smoothly flow out and enter the subsequent temperature reducing link.

[0025] Further, the inner wall of the spray pipe 1 is provided with a narrow channel 12 near the output port 11 side, the narrow channel 12 is located above the output port 11, and the narrow channel 12 is communicated with the output port 11, the input end of the narrow channel 12 is in contact with the outer wall of the piston sheet 7, and the inner wall of one end of the output port 11 is threadedly connected with a nozzle 14, the flow area of the narrow channel 12 can be adjusted by the movement of the piston sheet 7, so as to control the flow of the temperature reducing water, and the nozzle 14 can atomize the temperature reducing water, increase the contact area of the temperature reducing water and the steam, and improve the temperature reducing effect.

[0026] Further, the top output end of the threaded rod 4 extends to the top of the bolt 3, the top output end of the threaded rod 4 is fixedly connected with a handle 13, the handle 13 facilitates the rotation of the threaded rod 4 by the operator, and the position of the piston sheet 7 can be easily adjusted by rotating the handle 13, so as to control the flow area of the narrow channel 12 and the flow of the temperature reducing water.

[0027] Further, the output port 11 side output end is fixedly connected with a protection pipe 15, the protection pipe 15 is fixedly connected with a single seat regulating valve 16 away from the output port 11 side, the protection pipe 15 can play a certain protection effect on the nozzle 14 and the desuperheating water, avoid external factors to cause the interference of the desuperheating water injection, the single seat regulating valve 16 can accurately adjust the pressure and flow of the desuperheating water, ensure that the desuperheating water enters the steam pipeline in the appropriate state, realize the accurate control to the steam temperature.

[0028] Usage instructions

[0029] Structure description: 1, the spray pipe 1: as the main channel of the desuperheating water flow and adjustment, provide the installation basis for each part and guide the desuperheating water flow direction, is the core carrier of the whole device, each part is arranged around it;

[0030] 2, the connecting cover 2: for closing the top of the spray pipe 1 and connecting other components, welded on the top of the spray pipe 1, provide mounting position for bolt 3 and other components;

[0031] 3, bolt 3: threaded connection with threaded rod 4, realize the fixation and rotation transmission of threaded rod 4, one end of the inner wall is threaded connected with threaded rod 4, the top is provided with a handle 13;

[0032] 4, threaded rod 4: driven by rotation to move the pressing piece 5 and the piston piece 7, thereby adjusting the flow of desuperheating water, the bottom output end extends to the inner wall of the connecting cover 2 and is fixedly connected with the pressing piece 5, the top output end extends to the top of the bolt 3 and is fixedly connected with the handle 13;

[0033] 5, pressing piece 5: transfer the force of threaded rod 4 and compress spring 6, push the piston piece 7 to move, the bottom is fixedly connected with spring 6, the top is fixedly connected with the bottom of threaded rod 4;

[0034] 6, spring 6: play a buffering and resetting role, make the piston piece 7 can move stably under the action of threaded rod 4, the bottom output end is fixedly connected with the piston piece 7, the top is fixedly connected with the bottom of the pressing piece 5;

[0035] 7, piston piece 7: slide in the spray pipe 1, adjust the flow area of the narrow channel 12 by changing the position, thereby control the flow of desuperheating water, the outer side wall is slidingly matched with the inner wall of the spray pipe 1, the bottom is fixedly connected with the adjusting stop column 8, the top is fixedly connected with the bottom output end of spring 6;

[0036] 8, adjusting stop column 8: move with the piston piece 7, assist in adjusting the flow path and flow of desuperheating water, the bottom is fixedly connected with the piston piece 7, located in the spray pipe 1 close to the input port 9 side;

[0037] 9, input port 9: provide a channel for the desuperheating water to enter the spray pipe 1, the output end extends to the inner wall of the spray pipe 1, located on the outer wall of the spray pipe 1 side;

[0038] 10. Wide channel 10: providing a larger flow space for the desuperheating water to accumulate pressure and speed, located on the inner wall of the nozzle 1 away from the input port 9, below the input port 9;

[0039] 11. Output port 11: providing a channel for the desuperheating water to flow out of the nozzle 1, connected to the wide channel 10, located on the outer wall of the nozzle 1 close to the wide channel 10;

[0040] 12. Narrow channel 12: its flow area can be adjusted by the movement of the piston sheet 7 to control the flow of desuperheating water, connected to the output port 11, with the input end in contact with the outer wall of the piston sheet 7, located on the inner wall of the nozzle 1 close to the output port 11 and above the output port 11;

[0041] 13. Rotary handle 13: facilitating the operator to rotate the threaded rod 4 to adjust the position of the piston sheet 7 and the flow of desuperheating water, fixedly connected to the top output end of the threaded rod 4;

[0042] 14. Nozzle 14: atomizing the desuperheating water to increase the contact area between the desuperheating water and the steam, improving the desuperheating effect, threadedly connected to the inner wall of one end of the output port 11;

[0043] 15. Protective tube 15: protecting the nozzle 14 and the desuperheating water from external factors interfering with the injection of the desuperheating water, fixedly connected to the output end of one side of the output port 11;

[0044] 16. Single-seat regulating valve 16: accurately adjusting the pressure and flow of the desuperheating water to ensure that the desuperheating water enters the steam pipeline in a suitable state, fixedly connected to the side of the protective tube 15 away from the output port 11.

[0045] Working principle: first, the operator rotates the handle 13, handle 13 is connected with threaded rod 4, under the action of the screw, threaded rod 4 will move along the axial linear motion. When the threaded rod 4 moves down, it will push the tablet 5 together down, the spring 6 is compressed, the spring 6 generates elastic deformation, and then push the piston sheet 7 in the inner wall of the nozzle 1 sliding. Because the piston sheet 7 bottom fixedly connected with the adjusting baffle 8, and the narrow channel 12 input end and the piston sheet 7 outer wall contact, so the sliding of the piston sheet 7 will change the flow area of the narrow channel 12, when the piston sheet 7 moves down, the flow area of the narrow channel 12 increases, at this time, the desuperheating water can more smoothly from the input port 9 into the nozzle 1, then through the narrow channel 12 into the wide channel 10. Wide channel 10 provides a larger flow space for the desuperheating water, so that the desuperheating water can flow fully and accumulate a certain pressure and speed. Then, the desuperheating water flows out from the output port 11, one end of the output port 11 inner wall is threadedly connected with the nozzle 14, the desuperheating water is further accelerated and atomized when passing through the nozzle 14. The special design of the nozzle 14 can disperse the desuperheating water into fine droplets, greatly increasing the contact area of the desuperheating water and the steam, thereby improving the desuperheating effect. In the process of the desuperheating water flowing out from the output port 11, the output port 11 side output end is fixedly connected with the protection tube 15, the protection tube 15 can play a certain protective role for the nozzle 14 and the desuperheating water, avoiding the interference of external factors on the injection of the desuperheating water. At the same time, the protection tube 15 is fixedly connected with the single seat regulating valve 16 away from the output port 11. The single seat regulating valve 16 can accurately adjust the pressure and flow of the desuperheating water. When the temperature and pressure of the steam change, the operator can adjust the single seat regulating valve 16 to change the flow of the desuperheating water, so as to accurately control the temperature drop range of the steam. For example, when the steam temperature is too high, the operator can increase the opening of the single seat regulating valve 16, so that more desuperheating water passes through the narrow channel 12, the wide channel 10, and finally is sprayed out from the nozzle 14, fully mixes with the steam, and realizes rapid cooling. Conversely, when the steam temperature approaches the set value, the operator can reduce the opening of the single seat regulating valve 16 to reduce the flow of the desuperheating water, so as to avoid the steam temperature being too low.

[0046] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency heat exchange and desuperheating device for dry quenching steam in a methanol conversion process, comprising a nozzle (1), characterized in that: The nozzle (1) is welded to the top of a connecting cover (2), and the connecting cover (2) is provided with a bolt (3). One end of the inner wall of the bolt (3) is threadedly connected to a threaded rod (4). The bottom output end of the threaded rod (4) extends to one end of the inner wall of the connecting cover (2). A pressure plate (5) is fixedly connected to the bottom of the threaded rod (4). A spring (6) is fixedly connected to the bottom of the pressure plate (5). A piston plate (7) is fixedly connected to the bottom output end of the spring (6). The outer wall of the piston plate (7) is in sliding fit with the inner wall of the nozzle (1).

2. The high-efficiency heat exchange and desuperheating device for dry quenching steam in methanol conversion process according to claim 1, characterized in that: The piston plate (7) is fixedly connected to an adjusting stop (8) at the bottom. An input port (9) is opened on one side of the outer wall of the nozzle (1). The output end of the input port (9) extends to one end of the inner wall of the nozzle (1).

3. The high-efficiency heat exchange and desuperheating device for dry quenching steam in methanol conversion process according to claim 2, characterized in that: The nozzle (1) has a wide channel (10) on the side of its inner wall away from the inlet (9), and the wide channel (10) is located below the inlet (9).

4. The high-efficiency heat exchange and desuperheating device for dry quenching steam in methanol conversion process according to claim 3, characterized in that: The nozzle (1) has an output port (11) on the outer wall near the wide channel (10), and the output port (11) is connected to the wide channel (10).

5. The high-efficiency heat exchange and desuperheating device for dry quenching steam in methanol conversion process according to claim 4, characterized in that: The nozzle (1) has a narrow channel (12) on the inner wall near the output port (11). The narrow channel (12) is located above the output port (11) and is connected to the output port (11). The input end of the narrow channel (12) is in contact with the outer wall of the piston plate (7). A nozzle (14) is threadedly connected to the inner wall of one end of the output port (11).

6. The high-efficiency heat exchange and desuperheating device for dry quenching steam in methanol conversion process according to claim 1, characterized in that: The top output end of the threaded rod (4) extends to the top of the bolt (3), and a handle (13) is fixedly connected to the top output end of the threaded rod (4).

7. The high-efficiency heat exchange and desuperheating device for dry quenching steam in methanol conversion process according to claim 4, characterized in that: A protective tube (15) is fixedly connected to the output end on one side of the output port (11), and a single-seat regulating valve (16) is fixedly connected to the side of the protective tube (15) away from the output port (11).

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