A steam jacketed valve and applications

Abstract

The application provides a steam jacket valve and application, and belongs to the field of chemical production.The steam jacket valve comprises a valve body and a valve core in the valve body; the valve body comprises a body and a steam jacket arranged outside the body; the steam jacket comprises an inner layer and an outer layer, and a steam flow channel is formed between the inner layer and the outer layer; an inner layer hole is formed in the inner layer of the steam jacket, and an outer layer hole is formed in the outer layer of the steam jacket; the inner layer hole is communicated with the inner cavity of the body and the inner cavity of the steam jacket; a steam purging switch is arranged on the steam jacket and used for opening and closing the inner layer hole; a valve core channel is formed in the valve core; when the inner layer hole is opened and the valve core channel is communicated with the inner layer hole, steam can enter the valve core channel from the steam jacket and finally flow out of the valve, so that the valve core channel is purged. The application reduces the piping design workload, saves the device site space, reduces the site material quantity and construction difficulty.

Description

Technical Field

[0001] This invention belongs to the field of chemical production, specifically relating to a steam jacketed valve and its application. Background Technology

[0002] like Figure 1 As shown, the purging system in current bisphenol A and phenol-acetone chemical production plants typically includes: a purging inlet valve a (usually a plug valve or ball valve), connected to the pipeline or equipment requiring purging; a purging outlet valve b, connected to the purging collection system; and a steam purge port c, generally connected to steam, used to flush any residual material between the purging inlet valve a and the purging outlet valve b into the purging collection system downstream of the purging outlet valve b. The purpose of this design is to prevent easily crystallizing process materials with melting points of 50–160°C from remaining between the purging inlet valve a and the purging outlet valve b after the purging operation, thus preventing crystallization and blockage. There are as many as 100–300 purging points of this type in bisphenol A plants. However, valves and fittings are expensive, and the minimum welded straight pipe section required for valve-pipe connection results in a large structural space requirement below this section. Summary of the Invention

[0003] The purpose of this invention is to solve the problems existing in the prior art and provide a steam jacketed valve and its application, which reduces construction and installation costs and saves space.

[0004] This invention is achieved through the following technical solution:

[0005] In a first aspect, the present invention provides a steam jacketed valve, the steam jacketed valve comprising: a valve body and a valve core located within the valve body;

[0006] The valve body includes a main body and a steam jacket disposed outside the main body;

[0007] The body has a hollow structure, and the valve core is disposed in the inner cavity of the body;

[0008] The steam jacket includes an inner layer and an outer layer, with a steam flow channel formed between the inner and outer layers;

[0009] An inner layer hole is formed in the inner layer of the steam jacket, and an outer layer hole is formed in the outer layer of the steam jacket; the inner layer hole connects the inner cavity of the body with the inner cavity of the steam jacket.

[0010] A steam purge switch is provided on the steam jacket to open and close the inner layer hole;

[0011] A through-hole valve core channel is opened on the valve core;

[0012] When the inner hole is opened and the valve core channel is connected to the inner hole, steam can enter the valve core channel from the steam jacket and finally flow out from the valve, thus purging the valve core channel.

[0013] A further improvement of the present invention is that:

[0014] One end of the valve core channel is the upper opening of the valve core channel, and the other end is the lower opening of the valve core channel;

[0015] The inner diameter of the upper opening of the valve core channel is smaller than the inner diameter of the lower opening of the valve core channel.

[0016] A further improvement of the present invention is that:

[0017] Both the inner and outer holes are threaded holes;

[0018] The steam purging switch is a bolt that passes through the outer hole on the steam jacket from the outside to the inside and is screwed into the inner hole.

[0019] A further improvement of the present invention is that:

[0020] A valve inlet is provided at one end of the valve body, and a valve inlet channel is provided on the valve inlet;

[0021] A valve outlet is provided at the other end of the valve body, and a valve outlet channel is provided on the valve outlet.

[0022] A further improvement of the present invention is that:

[0023] The steam jacket is provided with a flow channel inlet and a flow channel outlet;

[0024] The flow channel inlet connects the valve inlet channel to the inner cavity of the body;

[0025] The flow channel outlet connects the valve outlet channel to the inner cavity of the body;

[0026] The centerlines of the valve inlet channel, flow channel inlet, flow channel outlet, and valve outlet channel are located on the same straight line.

[0027] When the valve is opened, the valve inlet channel, flow channel inlet, valve core channel, flow channel outlet, and valve outlet channel are connected to form a medium flow channel.

[0028] A further improvement of the present invention is that:

[0029] The inner diameters of the valve inlet channel, flow channel inlet, valve core channel upper opening, flow channel outlet, and valve outlet channel are the same.

[0030] A further improvement of the present invention is that:

[0031] The main body is a hollow sphere;

[0032] The central axes of the inner and outer holes are located below a straight line passing through the center of the body and perpendicular to the center line of the medium flow channel;

[0033] In the open state, the line connecting an edge point at the upper opening of the valve core channel and the center of the body forms a first angle with the center line of the medium flow channel; the line connecting an edge point at the lower opening of the valve core channel and the center of the body forms a second angle with the center line of the medium flow channel; the upper edge point of the inner hole is located on a straight line passing through the center of the body and perpendicular to the center line of the medium flow channel, and the line connecting the lower edge point of the inner hole and the center of the body forms a third angle with the straight line passing through the center of the body and perpendicular to the center line of the medium flow channel, and the sum of the first angle and the third angle is less than the second angle;

[0034] Preferably, the first included angle is 15-30°; the second included angle is 30-42°; and the third included angle is 5-12°.

[0035] A further improvement of the present invention is that:

[0036] A steam jacket inlet and a steam jacket outlet are provided on the outer layer of the steam jacket.

[0037] A second aspect of the present invention provides the application of the above-described steam jacketed valve in the chemical production of bisphenol A.

[0038] A third aspect of the present invention provides the application of the above-described steam jacketed valve in the chemical production of phenol and acetone.

[0039] Compared with the prior art, the beneficial effects of the present invention are: the present invention simplifies the structure of the prior art of combining three valves and pipe materials into one valve, which reduces the workload of piping design, saves on-site space, and reduces the amount of on-site materials and construction difficulty. Attached Figure Description

[0040] Figure 1 A schematic diagram of the existing wastewater treatment system;

[0041] Figure 2 A schematic diagram of the steam jacketed valve of the present invention in the open state;

[0042] Figure 3 A schematic diagram of the structure of the steam jacketed valve of the present invention when the valve core is rotated 60 degrees.

[0043] Figure 4 A schematic diagram of the steam jacketed valve of the present invention in steam flushing mode;

[0044] Figure 5 A schematic diagram of the steam jacketed valve of the present invention in the closed state. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings:

[0046] This invention provides a steam jacketed valve that can replace the existing purge inlet valve a, purge outlet valve b, steam purging port c, and the pipes connected to them in the purge system, thereby reducing construction and installation costs and saving space.

[0047] The steam jacketed valve provided by this invention is obtained by improving the existing jacketed full-bore ball valve or jacketed plug valve. This invention utilizes the original heat-insulating and heat-tracing jacket to flush and drain the valve with steam.

[0048] Specifically, such as Figures 2 to 5 As shown, the steam jacketed valve provided by the present invention includes: a valve body and a valve core located within the valve body; the valve body includes a main body and a steam jacket 4 disposed outside the main body. The main body has a hollow structure, and the valve core is disposed within the inner cavity of the main body. The steam jacket 4 includes an inner layer and an outer layer, with the outer wall of the main body being the inner layer of the steam jacket 4, forming a steam flow channel between the inner and outer layers. An inner layer hole 9 is formed in the inner layer of the steam jacket 4, and an outer layer hole is formed in the outer layer of the steam jacket 4, the inner layer hole 9 connecting the inner cavity of the main body with the inner cavity of the steam jacket 4. A steam purge switch 7 is provided on the steam jacket 4 for opening and closing the inner layer hole 9. A through valve core channel is formed on the valve core; when the inner layer hole 9 is opened and the valve core channel is connected to the inner layer hole 9, steam can enter the valve core channel from the steam jacket 4 and finally flow out from the valve, thus purging the valve core channel.

[0049] Example 1:

[0050] A valve inlet 2 is provided at one end of the valve body, and a valve outlet 3 is provided at the other end of the valve body. A valve inlet channel 21 is provided on the valve inlet 2, and a valve outlet channel 31 is provided on the valve outlet 3. The valve inlet channel 21 and the valve outlet channel 31 are connected to the inner cavity of the valve body, but not to the steam jacket 4.

[0051] Example 2:

[0052] The steam jacket 4 is provided with a flow channel inlet and a flow channel outlet. The flow channel inlet and flow channel outlet are not connected to the inner cavity of the steam jacket 4. The flow channel inlet connects the valve inlet channel 21 to the inner cavity of the body, and the flow channel outlet connects the valve outlet channel 31 to the inner cavity of the body. The center lines of the valve inlet channel 21, the flow channel inlet, the flow channel outlet, and the valve outlet channel 31 are located on the same straight line.

[0053] When the valve is opened, the upper opening 81 of the valve core channel is connected to the flow channel inlet and the valve body inlet channel 21, and the lower opening 81 of the valve core channel is connected to the flow channel outlet and the valve body outlet channel 31. In this way, the valve inlet channel 21, the flow channel inlet, the valve core channel, the flow channel outlet, and the valve outlet channel 31 are connected to form the medium flow channel 1. The medium can enter the medium flow channel 1 from the valve inlet channel 21 and finally flow out from the valve outlet channel 31.

[0054] Example 3:

[0055] A steam jacket inlet 5 and a steam jacket outlet 6 are provided on the outer layer of the steam jacket 4. Insulation steam can be injected into the inner cavity of the steam jacket 4 from the steam jacket inlet 5 and then flow out from the steam jacket outlet 6.

[0056] Example 4:

[0057] Both the inner hole 9 and the outer hole are threaded holes. The steam purge switch 7 is a bolt, which passes through the outer hole on the steam jacket 4 from the outside to the inside and is screwed into the inner hole 9. After tightening, the steam purge switch 7 closes the inner hole 9, and the inner cavity of the body is not connected to the inner cavity of the steam jacket 4. When the steam purge switch 7 is loosened, the inner hole 9 opens, and the inner cavity of the body is connected to the inner cavity of the steam jacket 4 through the inner hole 9. The heat-insulating steam in the steam jacket 4 can enter the inner cavity of the body through the inner hole 9. Preferably, the section of the steam purge switch 7 inserted into the inner hole 9 has a variable diameter structure, that is, the outer diameter of this section gradually decreases from the outside to the inside. This allows the steam purge switch 7 to better press against the inner hole 9 when it is screwed inward. Furthermore, a bevel can be machined on the far right side of the inner hole 9 to facilitate the sealing of the inner hole 9.

[0058] Preferably, the central axes of the inner hole 9 and the outer hole are located on the same straight line, and it can ensure that the inner hole 9 cannot be connected to the valve inlet channel 21 during the rotation of the valve core, thereby preventing steam from flowing back into the process pipeline connected to the valve inlet channel 21. At the same time, it can realize the connection between the inner hole 9 and the valve outlet channel 31, thereby realizing steam purging.

[0059] Example 5:

[0060] One end of the valve core channel is the upper opening 81, and the other end is the lower opening 82. The inner diameter of the upper opening 81 is smaller than the inner diameter of the lower opening 82. To prevent the medium from sticking to the inner wall of the valve core channel and to facilitate better blowing of the medium out of the valve core channel, the inner wall at the lower opening 82 is rounded.

[0061] Figure 2In the illustrated embodiment, the valve core channel has a cylindrical and frustum-shaped structure. It can also be designed so that the inner diameter gradually increases from the valve core channel inlet 81 to the valve core channel outlet 82, meaning the entire valve core channel has a frustum-shaped structure. This invention does not limit the shape of the valve core channel, as long as the inner diameter of the valve core channel outlet 82 is greater than the inner diameter of the valve core channel inlet 81, and the inner wall is smooth without any dead corners.

[0062] Preferably, the inner diameters of the valve inlet channel 21, the flow channel inlet, the valve core channel upper opening 81, the flow channel outlet, and the valve outlet channel 31 are the same.

[0063] Example 6:

[0064] like Figures 2 to 5 As shown, the body is a hollow sphere. The central axes of the inner layer hole 9 and the outer layer hole are located on the same straight line perpendicular to the center line of the medium flow channel 1. Figure 2 In the embodiment shown, the central axes of the inner layer hole 9 and the outer layer hole are located below a straight line passing through the center of the sphere and perpendicular to the center line of the medium flow channel. This allows for matching with a specific rotation angle, as detailed below:

[0065] like Figure 2 As shown, in the open state, the line connecting an edge point of the upper opening 81 of the valve core channel and the center of the sphere of the body forms a first angle with the center line of the medium flow channel 1, preferably 15-30°; the line connecting an edge point of the lower opening 82 of the valve core channel and the center of the sphere of the body forms a second angle with the center line of the medium flow channel 1, preferably 30-42°; the upper edge point of the inner hole 9 is located on a straight line passing through the center of the sphere of the body and perpendicular to the center line of the medium flow channel; the line connecting the lower edge point of the inner hole 9 and the center of the sphere of the body is perpendicular to the straight line passing through the center of the sphere of the body and perpendicular to the center line of the medium flow channel (i.e.,...). Figure 2 The first included angle is formed by the horizontal line passing through the center of the ball (preferably 5-12°), and the sum of the first and third included angles is less than the second included angle. That is, the second included angle is at least 5-12° larger than the first included angle. This ensures that during the entire rotation of the valve core from 0 to 90 degrees, the inner hole 9 is never connected to the valve inlet channel 21, but the valve inlet channel 21 is connected to the valve outlet channel 31, and the inner hole 9 is connected to the valve outlet channel 31. Preferably, in the open state, the first included angle is 30 degrees and the second included angle is 42 degrees.

[0066] Example 7:

[0067] In this invention, the structure for controlling the rotation of the valve core is a valve stem, which is the same as the valve stem in conventional ball valves and plug valves. Rotating the valve stem 90° clockwise will completely close the valve, and rotating it 90° counterclockwise will completely open the valve.

[0068] Furthermore, the present invention provides an elastic limiting structure on the outer wall of the valve body, such as an elastic short post, which, when the valve stem rotates clockwise to the angle where the inner hole 9 communicates with the valve outlet channel 31 (for example...), Figure 4 At 72° (as shown), the valve stem will be blocked by the elastic short column, prompting the operator to open the steam purge switch 7 for steam purging. After purging, continue rotating the valve stem to bend the elastic short column, then rotate it past the elastic short column to 90° to completely close the valve. Alternatively, the angle can be marked on the outer wall of the valve body; when the corresponding angle is reached, the operator can open the steam purge switch. The seal between the valve core and the valve body can use existing sealing methods, which will not be elaborated here.

[0069] The steam jacketed valve of the present invention has the following three working states:

[0070] Open status: such as Figure 2 As shown, in the open state, the process medium enters the valve from the valve inlet 2, passes through the medium flow channel 1, and flows out of the valve from the valve outlet 3; the heat preservation steam is injected into the steam jacket 4 from the steam jacket inlet 5 and flows out from the steam jacket outlet 6.

[0071] Steam purging status: such as Figure 3 and Figure 4 As shown, after rotating the valve core 8 clockwise by 60° to 84°, the upper opening 81 of the valve core channel is no longer connected to the valve inlet channel 21. That is, the valve core closes the flow channel inlet and the valve inlet channel 21. However, since the inner diameter of the lower opening 82 of the valve core channel is larger than the inner diameter of the upper opening 81, the lower opening 82 of the valve core channel remains connected to the valve outlet channel 31. After opening the steam purging switch 7, the steam entering the steam jacket 4 through the jacket steam inlet 5 will enter the inner cavity of the body through the inner hole 9 and then enter the valve core channel. The steam carries the residual medium in the valve core channel and flows out from the lower opening 82 of the valve core channel and the valve outlet channel 31, completing the steam purging action. The steam purging action cleans the residual medium on the valve core channel. Specifically, Figure 3 The image shows the state of valve core 8 when rotated 60°. At this time, the edge of the valve core channel 81 is aligned with the upper edge of the inner hole 9. The inner hole 9 is not yet connected to the inner cavity of the body. Continuing to rotate valve core 8 to 72°... Figure 4 The diagram shows the state when the valve core 8 is rotated 72°. Loosen the steam purge switch 7. At this point, the edge of the upper opening 81 of the valve core channel 8 aligns with the lower edge of the inner hole 9, and the inner hole 9 completely connects the inner cavity of the steam jacket 4 with the inner cavity of the main body. As the valve core 8 rotates from 72° to 84°, it gradually closes the valve outlet channel 31.

[0072] Closed state: When the valve core is rotated clockwise 84° to 90°, the upper opening 81 of the valve core channel is no longer connected to the valve inlet channel 21, and the lower opening 82 of the valve core channel is no longer connected to the valve outlet channel 31. When the steam purging switch 7 is closed, both the upper opening 81 and the lower opening 82 of the valve core channel have been purged and are in a clean state, and the valve is in the closed state. Figure 5 The image shows the state of the valve core after it has been rotated 90 degrees.

[0073] The steam jacketed valve of the present invention can be applied to chemical production processes involving easily crystallized and solidified media such as bisphenol A, phenol, and acetone.

[0074] The existing process flow for draining process media includes a series of operations involving multiple valves, such as opening process valves, closing process valves, opening steam purging, and closing steam purging. However, the present invention simplifies this process flow to an operation that only requires one valve: opening process valves, closing process valves to a specific angle for purging, and completely closing process valves.

[0075] The steam jacket valve of this invention replaces the existing drainage system that requires three valves and pipes. Especially when the pipes need to be insulated and heated, the original structure of three valves and pipes is very bulky. This invention not only takes into account the heat tracing of the valve steam jacket 4, which has a good heat tracing effect, but also has simple installation, small space occupation, and is easy to operate.

[0076] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0077] In the description of this invention, unless otherwise stated, the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0078] The above technical solution is only one embodiment of the present invention. For those skilled in the art, based on the principles disclosed in the present invention, it is easy to make various types of improvements or modifications, and not limited to the technical solutions described in the specific embodiments of the present invention. Therefore, the foregoing description is only a preferred option and is not restrictive.

Claims

1. A steam jacketed valve, the steam jacketed valve comprising: A valve body and a valve core located within the valve body; the valve body includes a main body and a steam jacket disposed outside the main body; the main body has a hollow structure, and the valve core is disposed within the inner cavity of the main body; the steam jacket includes an inner layer and an outer layer, with a steam flow channel formed between the inner and outer layers; characterized in that: An inner layer hole is formed in the inner layer of the steam jacket, and an outer layer hole is formed in the outer layer of the steam jacket; the inner layer hole connects the inner cavity of the body with the inner cavity of the steam jacket. A steam purge switch is provided on the steam jacket to open and close the inner layer hole; A through-hole valve core channel is opened on the valve core; When the inner hole is opened and the valve core channel is connected to the inner hole, steam can enter the valve core channel from the steam jacket and finally flow out from the valve.

2. The steam jacketed valve according to claim 1, characterized in that: One end of the valve core channel is the upper opening of the valve core channel, and the other end is the lower opening of the valve core channel; The inner diameter of the upper opening of the valve core channel is smaller than the inner diameter of the lower opening of the valve core channel.

3. The steam jacketed valve according to claim 1, characterized in that: Both the inner and outer holes are threaded holes; The steam purging switch is a bolt that passes through the outer hole on the steam jacket from the outside to the inside and is screwed into the inner hole.

4. The steam jacketed valve according to claim 2, characterized in that: A valve inlet is provided at one end of the valve body, and a valve inlet channel is provided on the valve inlet; A valve outlet is provided at the other end of the valve body, and a valve outlet channel is provided on the valve outlet.

5. The steam jacketed valve according to claim 4, characterized in that: The steam jacket is provided with a flow channel inlet and a flow channel outlet; The flow channel inlet connects the valve inlet channel to the inner cavity of the body; The flow channel outlet connects the valve outlet channel to the inner cavity of the body; The centerlines of the valve inlet channel, the flow channel inlet, the flow channel outlet, and the valve outlet channel are located on the same straight line; When the valve is opened, the valve inlet channel, flow channel inlet, valve core channel, flow channel outlet, and valve outlet channel are connected to form a medium flow channel.

6. The steam jacketed valve according to claim 5, characterized in that: The inner diameters of the valve inlet channel, flow channel inlet, valve core channel upper opening, flow channel outlet, and valve outlet channel are the same.

7. The steam jacketed valve according to claim 2, characterized in that: The main body is a hollow sphere; The central axes of the inner and outer holes are located below a straight line passing through the center of the body and perpendicular to the center line of the medium flow channel; In the open state, the line connecting an edge point at the upper opening of the valve core channel and the center of the body forms a first angle with the center line of the medium flow channel; the line connecting an edge point at the lower opening of the valve core channel and the center of the body forms a second angle with the center line of the medium flow channel; the upper edge point of the inner hole is located on a straight line passing through the center of the body and perpendicular to the center line of the medium flow channel, and the line connecting the lower edge point of the inner hole and the center of the body forms a third angle with the straight line passing through the center of the body and perpendicular to the center line of the medium flow channel, and the sum of the first angle and the third angle is less than the second angle; The first included angle is 15-30°; the second included angle is 30-42°; and the third included angle is 5-12°.

8. The steam jacketed valve according to claim 1, characterized in that: A steam jacket inlet and a steam jacket outlet are provided on the outer layer of the steam jacket.

9. The application of a steam jacketed valve as described in any one of claims 1 to 8 in the chemical production of bisphenol A.

10. The application of a steam jacketed valve as described in any one of claims 1 to 8 in the chemical production of phenol and acetone.

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