Steam balance optimizing device of BDO device

Abstract

The utility model discloses a steam balance optimizing device of a BDO device. The steam balance optimizing device comprises a first heat exchanger set, a second heat exchanger set, a steam generator, a fourth heat exchanger, a fifth heat exchanger and a sixth heat exchanger. The output end of the input end of the first group of heat exchangers is connected with the input end of a first condensed water collecting tank; the output end of the first condensed water collecting tank is connected with a 1.0 MPa steam pipe network and the input end of a first pressurizing water pump; the output end of the second heat exchanger is connected with the input end of the second condensed water collecting tank; the output end of the steam generator, the output end of the fourth heat exchanger and the output end of the fifth heat exchanger are connected with the input end of the third group of heat exchangers; according to the device, the energy consumption of the device is greatly reduced while various use points of the device are met; self-produced steam of an original high-pressure heat exchanger E-5610 and self-produced steam of a BDO separation tower top tank V-5755 are reserved, and a steam generator PK-6001 is additionally arranged. And the steam at the top of the original first condensed water flash tank is merged into a 1.0 MPa steam pipe network to fully recycle the steam after flash evaporation.

Description

Technical Field

[0001] The invention relates to the technical field of BDO production device using maleic anhydride method, and in particular to a steam balance optimization device for a BDO device. Background Art

[0002] BDO is designed to have three levels of steam user points, namely 1.55MPa / 0.55MPa / 0.22MPa steam. The original design of 1.55MPa steam is achieved by two temperature and pressure reductions through low-pressure deoxidation and water removal to achieve 0.55MPa / 0.22MPa steam. The high-pressure heat exchanger E-5610 and the BDO separation tower top tank V-5755 use waste heat to produce 0.22MPa steam.

[0003] Figure 1 This is the structural diagram of the steam balance device of the original BDO unit;

[0004] The steam balance of the original BDO unit uses a desuperheater and pressure reducer to reduce the temperature and pressure of 1.55MPa steam to 0.55MPa steam and 0.22MPa steam in two steps, which increases the consumption of deoxygenated water and steam. Summary of the invention

[0005] In order to solve the problem, the present invention provides a technical solution adopted by the present invention: comprising a first group of heat exchangers, a second group of heat exchangers, a steam generator, a fourth heat exchanger, a fifth heat exchanger and a sixth heat exchanger;

[0006] The output end of the first group of heat exchangers is connected to the input end of the first condensate collection tank, and the output end of the first condensate collection tank is connected to the 1.0MPa steam network and the input end of the first pressurized water pump; the output end of the first pressurized water pump is connected to the low-low pressure condensate to maleic anhydride condensate network, the low-low pressure condensate to clean condensate network and the low-low pressure condensate to polluted condensate network;

[0007] The output end of the second group of heat exchangers is connected to the input end of the second condensate collection tank;

[0008] The output end of the steam generator, the output end of the fourth heat exchanger, the output end of the fifth heat exchanger are connected to the input end of the third group of heat exchangers;

[0009] The output end of the third group of heat exchangers, the output end of the second condensate collection tank and the input end of the third condensate collection tank are connected, and the output end of the third condensate collection tank is connected to the input end of the second pressurized water pump;

[0010] The output end of the second pressurized water pump is connected to the low-pressure condensate to contaminated condensate pipe network;

[0011] The output end of the sixth heat exchanger is connected to the input end of the fourth condensate collection tank, and the output end of the fourth condensate collection tank is connected to the input end of the third pressurized water pump;

[0012] The output end of the third pressurized water pump is connected to the low-pressure condensate to contaminated condensate pipeline network.

[0013] Furthermore: the steam generator adopts steam generator PK-6001.

[0014] The steam balance optimization device of a BDO device provided by the present invention optimizes the steam provided by the petrochemical industrial park based on the original design of the 1.55MPa medium-pressure steam inlet device and the original design of the steam user point. The steam is reduced in temperature and pressure twice to provide 0.55MPa and 0.22MPa steam for each user point. After optimization, the temperature and pressure reducer was cancelled, and 0.55MPa and 0.22MPa were directly supplied through the plant network. Three flash tanks were set up, two of which fully recovered condensate, and the top steam of the other flash tank was sent out and merged into the 1.0MPa steam network. A new Ebara brand steam generator was added to recover the heat of the hydrogenation unit reaction product, which greatly reduced the energy consumption of the device while meeting the various use points of the device; the original high-pressure heat exchanger E-5610 and the BDO separation tower top tank V-5755 were retained to produce steam, and the Ebara brand steam generator PK-6001 was added. The top steam of the original first condensate flash tank was merged into the 1.0MPa steam network to fully recover the steam after flash evaporation; in addition, the maleic anhydride condensate network was added to fully utilize the recovered heat;

[0015] According to Kane's exergy and Rankine cycle theory, at the same temperature, the high-pressure steam Low pressure steam The lower the back pressure of the steam turbine, the lower the pressure of the steam, and the higher the thermal efficiency of the steam turbine. Under the premise of a certain output power, the steam consumption of the steam turbine can be reduced. The original design of using low-pressure deoxygenated water to reduce the temperature and pressure of the steam system can be cancelled, and the factory steam can be directly used to supply directly, which can greatly reduce the energy consumption of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is the structural diagram of the steam balance device of the original BDO unit;

[0018] Figure 2This is a structural diagram of the steam balance optimization device of the BDO device of the present application;

[0019] Figure 3 This is the structural diagram of the 0.22MPa steam inlet device;

[0020] Figure 4 This is the structural diagram of the 0.55MPa steam inlet device. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0023] Figure 2 This is a structural diagram of the steam balance optimization device of the BDO device of the present application;

[0024] Figure 3 This is the structural diagram of the 0.22MPa steam inlet device;

[0025] Figure 4 This is the structural diagram of the 0.55MPa steam inlet device.

[0026] A steam balance optimization device for a BDO device, comprising a first group of heat exchangers, a second group of heat exchangers, a steam generator, a fourth heat exchanger, a fifth heat exchanger and a sixth heat exchanger;

[0027] Also included are a 1.55MPa steam inlet device, a 0.55MPa steam inlet device, and a 0.22MPa steam inlet device;

[0028] The output end of the 1.55MPa steam inlet device is connected to the input end of the first group of heat exchangers; the output end of the first group of heat exchangers is connected to the input end of the first condensate collection tank, and the output end of the first condensate collection tank is connected to the 1.0MPa steam network and the input end of the first pressurized water pump; the output end of the first pressurized water pump is connected to the low-low pressure condensate to maleic anhydride condensate network, the low-low pressure condensate to clean condensate network and the low-low pressure condensate to polluted condensate network;

[0029] The output end of the 0.55MPa steam inlet device is connected to the input end of the second heat exchanger; the output end of the second heat exchanger is connected to the input end of the second condensate collection tank;

[0030] The output end of the 0.22MPa steam inlet device, the output end of the steam generator, the output end of the fourth heat exchanger, the output end of the fifth heat exchanger are connected to the input end of the third group of heat exchangers;

[0031] The output end of the third group of heat exchangers, the output end of the second condensate collection tank and the input end of the third condensate collection tank are connected, and the output end of the third condensate collection tank is connected to the input end of the second pressurized water pump;

[0032] The output end of the second pressurized water pump is connected to the low-pressure condensate to contaminated condensate pipe network;

[0033] The output end of the sixth heat exchanger is connected to the input end of the fourth condensate collection tank, and the output end of the fourth condensate collection tank is connected to the input end of the third pressurized water pump;

[0034] The output end of the third pressurized water pump is connected to the low-pressure condensate to contaminated condensate pipeline network.

[0035] The user point heat exchanger models of the first group of heat exchangers include EJ-5640, E-5711, E-5721, E-5726, E-5771, E-5731 and E-5790;

[0036] The user point heat exchanger models of the second group of heat exchangers include E-5420, E-5422, E-5421, E-5450 and R-5420;

[0037] The user point heat exchanger models of the third group of heat exchangers include E-5431AB, E-5701B, E-5461AB, E-5716 and E-5761;

[0038] The model of the first condensate collection tank is V-5930;

[0039] The model of the second condensate collection tank is V-5920;

[0040] The model of the third condensate collection tank is V-5910;

[0041] The model of the fourth condensate collection tank is V-5915;

[0042] The model of the first pressure water pump is P-5930;

[0043] The model of the second booster water pump is P-5910;

[0044] The model of the third pressurized water pump is P-5915;

[0045] The model of the fourth heat exchanger is V-5755;

[0046] The model of the fifth heat exchanger is V-5610;

[0047] The model of the sixth heat exchanger is E-5431A;

[0048] The model of the steam generator is PK-6001.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steam balance optimization device for a BDO device, characterized in that: comprising a first heat exchanger group, a second heat exchanger group, a steam generator, a fourth heat exchanger, a fifth heat exchanger and a sixth heat exchanger; The output end of the first group of heat exchangers is connected to the input end of the first condensate collection tank, and the output end of the first condensate collection tank is connected to the 1.0MPa steam network and the input end of the first pressurized water pump; the output end of the first pressurized water pump is connected to the low-low pressure condensate to maleic anhydride condensate network, the low-low pressure condensate to clean condensate network and the low-low pressure condensate to polluted condensate network; The output end of the second heat exchanger group is connected to the input end of the second condensate collection tank; The output end of the steam generator, the output end of the fourth heat exchanger, the output end of the fifth heat exchanger are connected to the input end of the third group of heat exchangers; The output end of the third group of heat exchangers, the output end of the second condensate collection tank and the input end of the third condensate collection tank are connected, and the output end of the third condensate collection tank is connected to the input end of the second pressurized water pump; The output end of the second pressurized water pump is connected to the low-pressure condensate to contaminated condensate pipe network; The output end of the sixth heat exchanger is connected to the input end of the fourth condensate collection tank, and the output end of the fourth condensate collection tank is connected to the input end of the third pressurized water pump; The output end of the third pressurized water pump is connected to the low-pressure condensate to contaminated condensate pipeline network.

2. The steam balance optimization device of a BDO device according to claim 1, characterized in that: The steam generator adopts the steam generator PK-6001.

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