A steam compressor carbon ring seal air supply and exhaust recycling system

Abstract

The present invention belongs to the technical field of carbon ring seals, and specifically discloses a steam compressor carbon ring seal air supply and exhaust recycling system, including a liquid storage tank, a carbon ring seal air supply pipe, a carbon ring seal exhaust pipe and an air-isolating air supply pipe; the liquid storage tank is respectively connected to the MVR process system and the carbon ring seal exhaust pipe; the air supply inlet of the carbon ring seal air supply pipe is connected to the mother pipe of the MVR process system; a sealed steam processing unit is provided on the carbon ring seal air supply pipe; the sealed steam processing unit includes a first filter, a water vapor separator, a first pressure gauge, a second filter, a pressure reducing regulating valve and a second pressure gauge, and the first filter is close to the air supply inlet of the carbon ring seal air supply pipe. The above system can solve the problem that the quality of carbon ring seal air intake water vapor is unstable, and the on-site working condition is relatively serious with liquid, which will cause the leakage of water vapor condensation water at the end of the carbon ring seal shaft to increase, and will also cause the material vapor to leak out, resulting in insufficient temperature rise of the material vapor in the volute, which will consume more electricity.

Description

Technical Field

[0001] The invention belongs to the technical field of carbon ring seals, and in particular relates to a steam compressor carbon ring seal air replenishment and exhaust recycling system. Background Art

[0002] In a multiple-effect evaporator, the compressor unit seal is an important guarantee for evaporation performance. In the prior art, the compressor unit seal usually adopts a floating oil seal, a carbon ring seal with gas as the sealing medium, or a mechanical seal. Usually, water vapor medium is used and a carbon ring seal is used to prevent the leakage of material vapor (with corrosive medium) in the volute. During the use of the carbon ring seal, a stream of isolated water vapor is added to the carbon ring seal to prevent the material vapor from leaking. The water vapor source enters the carbon ring seal to prevent the material vapor from coming out. The source of the added water vapor is to separate the water vapor from the mother pipe in the MVR process system as the gas supply source.

[0003] However, the quality of the carbon ring seal's inlet water vapor is unstable, and the on-site working conditions often carry serious liquid, which will cause the leakage of water vapor condensation water at the carbon ring seal shaft end to increase, and also cause the material steam to leak out, resulting in insufficient temperature rise of the material steam in the volute, which will consume more electricity. The increase in the leakage of condensation water at the carbon ring seal shaft end will also cause water vapor or condensation water to enter the speed increaser from the gap between the oil seal and the shaft, and long-term use will cause the deterioration of the lubricating oil. Summary of the invention

[0004] The purpose of the present invention is to provide a steam compressor carbon ring seal air replenishment and exhaust recycling system to solve the problems in the prior art that the quality of carbon ring seal intake water vapor is unstable and the on-site working conditions often carry serious liquid, which will cause the leakage of water vapor condensate at the carbon ring seal shaft end to increase, and will also cause material steam to leak out, resulting in insufficient temperature rise of material steam in the volute, which will consume more electricity.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is: a steam compressor carbon ring seal air supply and exhaust recycling system, comprising a liquid storage tank, a carbon ring seal air supply pipe connected to the carbon ring seal, a carbon ring seal exhaust pipe and an isolated air supply pipe; the carbon ring seal air supply pipe is used to supply water vapor into the carbon ring seal; the isolated air supply pipe is used to step isolated air into the carbon ring seal to prevent water vapor from leaking from the carbon ring seal shaft end; the carbon ring seal exhaust pipe is used to lead out excess water vapor; the liquid storage tank is connected to the MVR process system and the carbon ring seal exhaust pipe respectively; the air supply inlet of the carbon ring seal air supply pipe is connected to the main pipe of the MVR process system; a sealed steam processing unit is provided on the carbon ring seal air supply pipe; the sealed steam processing unit comprises a first filter, a water vapor separator, a first pressure gauge, a second filter, a pressure reducing regulating valve and a second pressure gauge arranged in sequence, the first filter is close to the air supply inlet of the carbon ring seal air supply pipe; the first filter and the second filter are both used to filter water in the water vapor.

[0006] Furthermore, the sealed steam treatment unit also includes a steam trap, which is arranged on a water outlet pipe of a water vapor separator, and the water outlet pipe of the water vapor separator is connected to the liquid storage tank.

[0007] Furthermore, the measuring range of the first pressure gauge is 0-1Mpa.

[0008] Furthermore, the measuring range of the second pressure gauge is (-10)-60Kpa.

[0009] Furthermore, a ball valve is provided between the air supply inlet of the carbon ring sealed air supply pipe and the first filter.

[0010] Furthermore, the carbon ring sealed air supply pipe is located on one side of the carbon ring seal, and the carbon ring sealed exhaust pipe and the air-isolating air supply pipe are located on the other side of the carbon ring seal.

[0011] The working principle of the technical solution is as follows: the liquid water vapor separated from the mother pipe in the MVR process system enters the carbon ring seal air supply pipe from the air supply inlet of the carbon ring seal air supply pipe, and enters the first filter through the ball valve to perform a primary filtration of the water in the water vapor; then enters the water vapor separator, separates the liquid water in the water vapor through the water vapor separator, and flows out through the steam trap, and the condensed water separated from the steam trap flows into the liquid storage tank for recycling; the remaining filtered water vapor in the water vapor separator enters the second filter after entering the first pressure gauge for filtration, and performs a secondary filtration of the water in the water vapor; the water vapor after filtration enters the carbon ring seal through the pressure reducing regulating valve and the second pressure gauge to reduce the leakage of the carbon ring seal shaft end.

[0012] The beneficial effects of this technical solution are as follows: ① This technical solution can filter the water vapor of the carbon ring seal, and connect the condensed water flowing out of the steam trap and the water vapor flowing out of the carbon ring seal exhaust pipe to the external liquid storage tank, and pump the condensed water in the liquid storage tank back to the MVR system for recycling as a material water source. ② This technical solution can effectively prevent the situation where water vapor is liquid-carrying through the water vapor separator, the pressure reducing regulating valve, the first filter, the second filter, the first pressure gauge and the second pressure gauge, and can avoid the adverse effects caused by the unstable water vapor quality in the field working conditions, and can also avoid the situation where the water vapor condensed water leakage at the carbon ring seal shaft end in the prior art increases. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A stereoscopic view of a steam compressor carbon ring seal air supply and exhaust gas recycling system according to the present invention in the main viewing direction;

[0014] Figure 2 The present invention is a stereoscopic view from the side of a carbon ring seal air supply and exhaust gas recycling system for a steam compressor. DETAILED DESCRIPTION

[0015] The following is further described in detail through specific implementation methods:

[0016] The figure marks in the drawings of the specification include: carbon ring seal 1, carbon ring seal air supply pipe 2, air isolation air supply pipe 3, carbon ring seal exhaust pipe 4, air supply inlet 5, first filter 6, water vapor separator 7, first pressure gauge 8, second filter 9, pressure reducing regulating valve 10, second pressure gauge 11, steam trap 12, water outlet pipe 13.

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The embodiment is basically as shown in the attached Figure 1-2As shown: a steam compressor carbon ring seal air supply and exhaust recycling system, including a liquid storage tank, a carbon ring seal air supply pipe 2 connected to the carbon ring seal 1, a carbon ring seal exhaust pipe 4 and an isolated air supply pipe 3, the carbon ring seal air supply pipe 2 is located on one side of the carbon ring seal 1, and the carbon ring seal exhaust pipe 4 and the isolated air supply pipe 3 are located on the other side of the carbon ring seal 1; the carbon ring seal air supply pipe 2 is used to supply water vapor into the carbon ring seal 1; the isolated air supply pipe 3 is used to introduce isolated air into the carbon ring seal 1 to prevent water vapor from leaking from the axial end of the carbon ring seal 1; the carbon ring seal exhaust pipe 4 is used to lead out excess water vapor; the liquid storage tank The tank is connected to the MVR process system and the carbon ring sealed exhaust pipe 4 respectively; the air inlet 5 of the carbon ring sealed air supply pipe 2 is connected to the main pipe of the MVR process system; the carbon ring sealed air supply pipe 2 is provided with a sealed steam processing unit; the sealed steam processing unit includes a first filter 6, a water vapor separator 7, a first pressure gauge 8, a second filter 9, a pressure reducing regulating valve 10 and a second pressure gauge 11 arranged in sequence, the first filter 6 is close to the air inlet 5 of the carbon ring sealed air supply pipe 2, the first filter 6 and the second filter 9 are both water vapor filters, and the first filter 6 and the second filter 9 are both used to filter the water in the water vapor. A ball valve is provided between the air inlet 5 of the carbon ring sealed air supply pipe 2 and the first filter 6. The sealed steam processing unit also includes a steam trap 12, which is arranged on the outlet pipe 13 of the water vapor separator 7, and the outlet pipe 13 of the water vapor separator is connected to the liquid storage tank. The range of the first pressure gauge 8 is 0-1Mpa, and the range of the second pressure gauge 11 is (-10)-60Kpa.

[0019] The specific implementation process is as follows:

[0020] In the MVR process system, the liquid water vapor separated from the mother pipe enters the carbon ring seal air supply pipe 2 from the air supply inlet 5 of the carbon ring seal air supply pipe 2, and enters the first filter 6 through the ball valve to perform a primary filtration of the water in the water vapor; then enters the water vapor separator 7, separates the liquid water in the water vapor through the water vapor separator 7, and flows out through the steam trap 12, and the condensed water separated from the steam trap 12 flows into the liquid storage tank for recycling; the remaining filtered water vapor in the water vapor separator 7 enters the second filter 9 after entering the first pressure gauge 8 to be filtered, and the water in the water vapor is filtered at the second level; the water vapor after filtration enters the carbon ring seal 1 through the pressure reducing regulating valve 10 and the second pressure gauge 11 to reduce the leakage of the shaft end of the carbon ring seal 1.

[0021] It should be noted that, in this article, relational terms such as first and second, etc. 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 these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0022] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A steam compressor carbon ring seal air supply and exhaust recycling system, characterized in that: The invention comprises a liquid storage tank, a carbon ring seal air supply pipe (2) connected to a carbon ring seal (1), a carbon ring seal exhaust pipe (4) and an air-insulating air supply pipe (3); the carbon ring seal air supply pipe (2) is used to supply water vapor into the carbon ring seal (1); the air-insulating air supply pipe (3) is used to introduce air-insulating into the carbon ring seal (1) to prevent water vapor from leaking from the axial end of the carbon ring seal (1); the carbon ring seal exhaust pipe (4) is used to lead out excess water vapor; the liquid storage tank is respectively connected to an MVR process system and a carbon ring seal exhaust pipe (4); the air supply inlet (5) of the carbon ring seal air supply pipe (2) is connected to the main pipe of the MVR process system; a sealed steam processing unit is provided on the carbon ring seal air supply pipe (2); the sealed steam processing unit comprises a first A filter (6), a water vapor separator (7), a first pressure gauge (8), a second filter (9), a pressure reducing regulating valve (10) and a second pressure gauge (11), wherein the first filter (6) is close to the air supply inlet (5) of the carbon ring sealed air supply pipe (2); the first filter (6) and the second filter (9) are both used to filter the water in the water vapor; the sealed steam treatment unit also includes a steam trap (12), wherein the steam trap (12) is arranged on the water outlet pipe (13) of the water vapor separator (7), and the water outlet pipe (13) of the water vapor separator is connected to the liquid storage tank; the carbon ring sealed air supply pipe (2) is located on one side of the carbon ring seal (1), and the carbon ring sealed exhaust pipe (4) and the air-isolating air supply pipe (3) are located on the other side of the carbon ring seal (1).

2. A steam compressor carbon ring seal air supply and exhaust recycling system according to claim 1, characterized in that: The measuring range of the first pressure gauge (8) is 0-1Mpa.

3. A steam compressor carbon ring seal air supply and exhaust recycling system according to claim 1, characterized in that: The measuring range of the second pressure gauge (11) is (-10)-60Kpa.

4. A steam compressor carbon ring seal air supply and exhaust recycling system according to claim 1, characterized in that: A ball valve is provided between the air supply inlet (5) of the carbon ring sealed air supply pipe (2) and the first filter (6).

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