Evaporator tube arrangement

Abstract

The application discloses a kind of evaporator pipeline devices, including dehydration backflow input pipe and light removal backflow input pipe, also including evaporator, the inside processing tank of evaporator is provided, dehydration backflow input pipe and light removal backflow input pipe are communicated with the inside processing tank of evaporator, the bottom of the inside processing tank of evaporator is also communicated dehydration backflow output pipe and light removal backflow output pipe, dehydration backflow input pipe is used for dehydration backflow material input, light removal backflow input pipe is used for light removal backflow material input, light removal backflow output pipe is used for light removal backflow material output to mother liquor pump and return to reaction kettle again, dehydration backflow output pipe is used for dehydration backflow material output to mother liquor pump and return to reaction kettle again.The application increases dehydration backflow to evaporator, light removal backflow to evaporator pipeline, when dilute acid pump fails, it can be used at any time, does not affect acetic acid production, avoids acetic acid device big load reduction or parking.

Description

Technical Field

[0001] This invention relates to an evaporator piping system. Background Technology

[0002] In the production of dilute acid, the dehydrated reflux material and the light phase material from the separator both enter the dilute acid pump inlet manifold and are then returned to the reactor via the pump, achieving material circulation and system balance. The temperature of the dehydrated reflux material is slightly higher than 72℃, which corrodes the dilute acid pump. Changes in the composition of the dehydrated reflux and separator materials can lead to unstable operation and malfunctions in the dilute acid pump, affecting production. In severe cases, it can cause a short-term shutdown of the acetic acid unit. The short operating cycle of the dilute acid pump necessitates overtime repairs after a malfunction; if both fail, the acetic acid unit will be shut down. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the evaporator piping device of the present invention includes a dehydration reflux input pipe and a light-weight reflux input pipe, and also includes an evaporator. An internal treatment tank is provided inside the evaporator. The dehydration reflux input pipe and the light-weight reflux input pipe are both connected to the internal treatment tank of the evaporator. The bottom of the internal treatment tank of the evaporator is also connected to a dehydration reflux output pipe and a light-weight reflux output pipe. The dehydration reflux input pipe is used for inputting dehydration reflux material, the light-weight reflux input pipe is used for inputting light-weight reflux material, the light-weight reflux output pipe is used for outputting light-weight reflux material to the mother liquor pump and then returning it to the reactor, and the dehydration reflux output pipe is used for outputting dehydration reflux material to the mother liquor pump and then returning it to the reactor.

[0004] Preferably, the bottom of the evaporator is connected to a steam supply pipe, and an exhaust valve is provided at the top of the evaporator.

[0005] Preferably, the bottom of the evaporator is also provided with a descaling pipe, which is used for draining wastewater.

[0006] The evaporator is also equipped with a steam return output pipe at the top, and the pipe connected to the steam return output pipe is also connected to the steam return input pipe on the side of the evaporator. A pressurization unit and a secondary heating unit are also installed on the pipe connected to the steam return output pipe.

[0007] Preferably, a heat exchange unit is also provided on the pipe connected to the steam reflux output pipe. The heat exchange unit includes a second heat exchange chamber and a first heat exchange chamber. The second heat exchange chamber is used to pass through the pipe of the steam reflux output pipe, and the first heat exchange chamber is used to pass through the extension pipe of the dehydration reflux output pipe and the light dehydration reflux output pipe. The outer sides of the first heat exchange chamber and the second heat exchange chamber are also wrapped with heat insulation material.

[0008] Compared with the prior art, the beneficial effects of this invention are as follows: In this invention, the dehydration reflux material is input into the dehydration reflux input pipe, the delighting reflux material is input into the light-weight reflux input pipe, the delighting reflux material is output into the light-weight reflux output pipe to the mother liquor pump and then back to the reactor, and the dehydration reflux output pipe is also output to the mother liquor pump and then back to the reactor. This invention adds dehydration reflux to the evaporator and light-weight reflux to the evaporator pipelines. When the dilute acid pump malfunctions, it can be put into operation at any time without affecting acetic acid production, avoiding significant load reduction or shutdown of the acetic acid unit. This invention also adds dehydration reflux to the evaporator and light-weight reflux to the evaporator pipelines. During daily production, the dilute acid pump can be kept on standby, extending its service life and saving maintenance costs.

[0009] During normal operation, the dehydrated water return to the evaporator and the deionized light oil return to the evaporator pipelines are in operation, while the dilute acid pump is off standby. During start-up and shutdown, the dilute acid pump is turned on and the new pipelines are in standby status. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0011] Figure 2 This is a schematic diagram of the structure of one embodiment of the present invention.

[0012] Evaporator 1; Internal treatment tank 2; Dehydration reflux inlet pipe 3; Light weight removal reflux outlet pipe 4; Exhaust valve 5; Dehydration reflux outlet pipe 6; Steam reflux outlet pipe 7; Pressurization unit 8; Decontamination pipe 9; Secondary heating unit 10; Light weight removal reflux inlet pipe 11; Steam reflux inlet pipe 12; Steam replenishment pipe 13; Heat exchange unit 14; First heat exchange chamber 15; Second heat exchange chamber 16. Detailed Implementation

[0013] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0014] Example 1

[0015] like Figure 1As shown, the evaporator piping device embodiment of the present invention includes a dehydration reflux input pipe 3 and a light-weight reflux input pipe 11, and also includes an evaporator 1. An internal treatment tank 2 is provided inside the evaporator 1. The dehydration reflux input pipe 3 and the light-weight reflux input pipe 11 are both connected to the internal treatment tank 2 of the evaporator 1. The bottom of the internal treatment tank 2 of the evaporator 1 is also connected to a dehydration reflux output pipe 6 and a light-weight reflux output pipe 4. The dehydration reflux input pipe 3 is used for inputting dehydration reflux material, the light-weight reflux input pipe 11 is used for inputting light-weight reflux material, the light-weight reflux output pipe 4 is used for outputting light-weight reflux material to the mother liquor pump and then returning it to the reactor, and the dehydration reflux output pipe 6 is used for outputting dehydration reflux material to the mother liquor pump and then returning it to the reactor.

[0016] Example 2

[0017] like Figure 1 As shown, the evaporator piping device embodiment of the present invention includes a dehydration reflux input pipe 3 and a light-weight reflux input pipe 11, and also includes an evaporator 1. An internal treatment tank 2 is provided inside the evaporator 1. Both the dehydration reflux input pipe 3 and the light-weight reflux input pipe 11 are connected to the internal treatment tank 2 of the evaporator 1. The bottom of the internal treatment tank 2 of the evaporator 1 is also connected to a dehydration reflux output pipe 6 and a light-weight reflux output pipe 4. The dehydration reflux input pipe 3 is used for inputting dehydration reflux material, the light-weight reflux input pipe 11 is used for inputting light-weight reflux material, the light-weight reflux output pipe 4 is used for outputting light-weight reflux material to the mother liquor pump and then back to the reactor, and the dehydration reflux output pipe 6 is used for outputting dehydration reflux material to the mother liquor pump and then back to the reactor. Preferably, the bottom of the evaporator 1 is connected to a steam replenishment pipe 13, and an exhaust valve 5 is provided at the top of the evaporator 1. Preferably, a descaling pipe 9 is also provided at the bottom of the evaporator 1 for draining wastewater. Preferably, the evaporator 1 is further provided with a steam return output pipe 7 at its top. The pipe connected to the steam return output pipe 7 is also connected to the steam return input pipe 12 on the side of the evaporator 1. A pressurization unit 8 and a secondary heating unit 10 are also provided on the pipe connected to the steam return output pipe 7. The pressurization unit 8 is used to increase the pressure, for example by using a pump, and the secondary heating unit 10 is used to generate steam through secondary heating, for example by using a boiler or heater.

[0018] Example 3

[0019] like Figure 2As shown, the evaporator piping device embodiment of the present invention includes a dehydration reflux input pipe 3 and a light-weight reflux input pipe 11, and also includes an evaporator 1. An internal treatment tank 2 is provided inside the evaporator 1. The dehydration reflux input pipe 3 and the light-weight reflux input pipe 11 are both connected to the internal treatment tank 2 of the evaporator 1. The bottom of the internal treatment tank 2 of the evaporator 1 is also connected to a dehydration reflux output pipe 6 and a light-weight reflux output pipe 4. The dehydration reflux input pipe 3 is used for inputting dehydration reflux material, the light-weight reflux input pipe 11 is used for inputting light-weight reflux material, the light-weight reflux output pipe 4 is used for outputting light-weight reflux material to the mother liquor pump and then returning it to the reactor, and the dehydration reflux output pipe 6 is used for outputting dehydration reflux material to the mother liquor pump and then returning it to the reactor. A heat exchange unit 14 is also installed on the pipe connected to the steam return output pipe 7. The heat exchange unit 14 includes a second heat exchange chamber 16 and a first heat exchange chamber 15. The second heat exchange chamber 16 passes through the pipe of the steam return output pipe 7, and the first heat exchange chamber 15 passes through the extension pipes of the dehydration return output pipe 6 and the light-duty dehydration return output pipe 4. The outer sides of the first heat exchange chamber 15 and the second heat exchange chamber 16 are also wrapped with heat insulation material. In practice, the heat exchange unit 14 can recover heat from the output pipe.

[0020] Principle of the embodiments of the present invention:

[0021] In this invention, the dehydration reflux input pipe 3 and the light-weight reflux input pipe 11 both input the dehydration reflux material. The light-weight reflux output pipe 4 outputs the light-weight reflux material to the mother liquor pump and then back to the reactor. The dehydration reflux output pipe 6 also outputs the dehydration reflux material to the mother liquor pump and then back to the reactor. This invention adds dehydration reflux to the evaporator and light-weight reflux to the evaporator pipelines. When the dilute acid pump malfunctions, it can be put into operation immediately without affecting acetic acid production, avoiding significant load reduction or shutdown of the acetic acid plant. Furthermore, the addition of these pipelines allows for daily operation while the dilute acid pump can be kept on standby, extending its service life and saving on maintenance costs.

[0022] During normal operation, the dehydrated water return to the evaporator and the deionized light oil return to the evaporator pipelines are in operation, while the dilute acid pump is off standby. During start-up and shutdown, the dilute acid pump is turned on and the new pipelines are in standby status.

[0023] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An evaporator piping device, characterized in that, The system includes a dehydration reflux inlet pipe and a light-weight reflux inlet pipe, and also includes an evaporator. An internal treatment tank is installed inside the evaporator. Both the dehydration reflux inlet pipe and the light-weight reflux inlet pipe are connected to the internal treatment tank of the evaporator. The bottom of the internal treatment tank is also connected to a dehydration reflux outlet pipe and a light-weight reflux outlet pipe. The dehydration reflux inlet pipe is used for inputting dehydration reflux material, and the light-weight reflux inlet pipe is used for inputting light-weight reflux material. The light-weight reflux outlet pipe is used for outputting the light-weight reflux material to the mother liquor pump and then back to the reactor. The dehydration reflux outlet pipe is used for outputting the dehydration reflux material to the mother liquor pump and then back to the reactor. The top of the evaporator is also equipped with a steam return output pipe, and the pipe connected to the steam return output pipe is also connected to the steam return input pipe on the side of the evaporator. A pressurization unit and a secondary heating unit are also provided on the pipe connected to the steam return output pipe. A heat exchange unit is also provided on the pipe connected to the steam return output pipe. The heat exchange unit includes a second heat exchange chamber and a first heat exchange chamber. The second heat exchange chamber is used to pass through the pipe of the steam return output pipe, and the first heat exchange chamber is used to pass through the extension pipes of the dehydration return output pipe and the light dehydration return output pipe. The outer sides of the first heat exchange chamber and the second heat exchange chamber are also wrapped with heat insulation material. The bottom of the evaporator is connected to a steam supply pipe, and the top of the evaporator is equipped with an exhaust valve; The evaporator is also equipped with a descaling pipe at the bottom, which is used for draining wastewater.

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