阅读说明：本技术 多通道水煤浆烧嘴控制系统 (Multi-channel coal water slurry burner control system ) 是由 聂旺华 张强 于 2019-10-21 设计创作，主要内容包括：本发明公开了一种多通道水煤浆烧嘴控制系统,涉及水煤气制备技术领域。本发明包括煤浆流量求和器、煤浆负荷与流量分配控制模块、氧煤比控制模块、中心氧比例控制模块以及与水煤浆气化炉上的多通道烧嘴相连接的第一煤浆流量控制回路、第二煤浆流量控制回路、主氧流量控制回路和中心氧流量控制回路。本发明将水煤浆烧嘴的单一煤浆通道分为两股或多股,通过氧煤比控制模块实现氧煤比控制及约束,将氧气与煤浆的比值即氧煤比和气化炉反应温度控制在合理范围,控制通道烧嘴煤浆流量的分配、中心氧比例按成设定比例跟踪总氧变化和氧煤比控制及约束,改善了水煤浆烧嘴的雾化效果。(The invention discloses a multi-channel coal water slurry burner control system, and relates to the technical field of water gas preparation. The system comprises a coal slurry flow summator, a coal slurry load and flow distribution control module, an oxygen-coal ratio control module, a central oxygen proportion control module, a first coal slurry flow control loop, a second coal slurry flow control loop, a main oxygen flow control loop and a central oxygen flow control loop, wherein the first coal slurry flow control loop, the second coal slurry flow control loop, the main oxygen flow control loop and the central oxygen flow control loop are connected with a multi-channel burner on a coal water slurry gasification furnace. The single coal slurry channel of the coal water slurry burner is divided into two or more streams, the oxygen-coal ratio control and restriction are realized through the oxygen-coal ratio control module, the ratio of oxygen to coal slurry, namely the oxygen-coal ratio and the gasification furnace reaction temperature, is controlled within a reasonable range, the distribution of the coal slurry flow of the burner of the channel and the central oxygen ratio are controlled according to a set proportion to track the total oxygen change and the oxygen-coal ratio control and restriction, and the atomization effect of the coal water slurry burner is improved.)

1. A multi-channel coal water slurry burner control system is characterized by comprising a coal slurry flow summator (001), a coal slurry load and flow distribution control module (002), an oxygen-coal ratio control module (003), a central oxygen proportion control module (004), a first coal slurry flow control loop (101), a second coal slurry flow control loop (201), a main oxygen flow control loop (301) and a central oxygen flow control loop (401);

the first coal slurry flow control loop (101), the second coal slurry flow control loop (201), the main oxygen flow control loop (301) and the central oxygen flow control loop (401) are respectively connected with a multi-channel burner on the coal water slurry gasification furnace (03).

The coal slurry flow summator (001) receives output signals of a first coal slurry median selector (102) and a second coal slurry median selector (202) on a first coal slurry flow control loop (101) and a second coal slurry flow control loop (201) respectively, and sends the summation calculation result of the coal slurry flow summator (001) to an oxygen-coal ratio control module (003).

2. The multi-channel coal-water slurry burner control system of claim 1, wherein the coal slurry load and flow distribution module (002) comprises: the coal slurry flow rate control system comprises a gasification furnace coal slurry load setter (21), a coal slurry flow rate distribution ratio setter (22), a first multiplier (23), a second multiplier (24), a subtracter (25), a first ratio amplitude limiter (26) and a load amplitude limiter (27); the output signal ends of the first multiplier (23) and the second multiplier (24) are respectively connected with a first coal slurry flow control loop (101) of a first coal slurry feeding pump (01) and a second coal slurry flow control loop (201) of a second coal slurry feeding pump (02).

3. The multi-channel coal-water slurry burner control system of claim 1, wherein the oxygen-to-coal ratio control module (003) comprises: the device comprises an oxygen-coal ratio setter (31), a second ratio limiter (32), an oxygen-coal ratio adjuster (33), a first divider (34), a second divider (35), a first cross limiting module (36) and a second cross limiting module (37); the oxygen-coal ratio control module (003) is connected with signals from a coal slurry flow summator (001), a coal slurry load and flow distribution control module (002) and an oxygen flow control loop multiplier (306), and a third multiplier (38);

the first cross amplitude limiting module (36) comprises a first high selector (36-1), a first low selector (36-2) and a fourth multiplier (36-3); the second cross amplitude limiting module (37) comprises a second low selector (37-1), a second high selector (37-2) and a fifth multiplier (37-3);

and the data output end of the third multiplier (38) is connected with a first flow regulator of the main oxygen flow control loop (301), and the data output end of the first divider (34) is connected with a coal slurry load and flow distribution control module (002) through a second cross amplitude limiting module (37).

4. The multi-channel coal-water slurry burner control system of claim 1, wherein the central oxygen proportion control module (004) comprises: a ratio setter (41), a limiter (42), and a sixth multiplier (43); the central oxygen proportion control module (004) is connected with a signal of an oxygen flow control loop multiplier (306), and the data output end of the oxygen flow control loop multiplier (306) is connected with a second flow regulator of the central oxygen flow control loop (401).

5. The multi-channel coal-water slurry burner control system of claim 1, wherein the first coal-water slurry flow control loop (101) comprises: the device comprises a third flow regulator, a first coal slurry median selector (102), a first coal slurry flow meter (110), a second coal slurry flow meter (111), a third coal slurry flow meter (112), a first coal slurry feeding pump rotating speed regulator (103) and a first coal slurry feeding pump rotating speed meter (104);

the first coal slurry median selector (102) is connected with signals of a first coal slurry flow meter (110), a second coal slurry flow meter (111) and a third coal slurry flow meter (112), the first coal slurry feed pump tachometer (104) sequentially connects a rotating speed signal of a first coal slurry feed pump (01) to the first coal slurry median selector (102) through a first rotating speed flow converter (105) and a first selector (106), and a data output end of the first coal slurry median selector (102) is connected with a third flow regulator of a first coal slurry flow control loop (101);

the output end of a third flow regulator of the first coal slurry flow control loop (101) is connected with a first coal slurry feeding pump rotating speed regulator (103); the first coal slurry flow control loop (101) is connected with one coal slurry channel in the multi-channel burner of the coal water slurry gasification furnace (03).

6. The multi-channel coal-water slurry burner control system of claim 1, wherein the second coal-water slurry flow control loop (201) comprises: the device comprises a fourth flow regulator, a second coal slurry median selector (202), a fourth coal slurry flow meter (210), a fifth coal slurry flow meter (211), a sixth coal slurry flow meter (212), a second coal slurry feeding pump rotating speed regulator (103) and a second coal slurry feeding pump rotating speed measuring instrument (204);

the second coal slurry median selector (202) is connected with signals of a fourth coal slurry flow meter (210), a fifth coal slurry flow meter (211) and a sixth coal slurry flow meter (212), the second coal slurry feed pump rotating speed measuring instrument (204) sequentially connects a rotating speed signal of a second coal slurry feed pump (02) to the second coal slurry median selector (202) through a second rotating speed and flow converter (205) and a second selector (206), and a data output end of the second coal slurry median selector (202) is connected with a fourth flow regulator of a second coal slurry flow control loop (201);

the output end of a fourth flow regulator of the second coal slurry flow control loop (201) is connected with a second coal slurry feeding pump rotating speed regulator (203); and the second coal slurry flow control loop (201) is connected with one coal slurry channel in the multi-channel burner of the coal water slurry gasification furnace (03).

7. The multi-channel coal-water slurry burner control system as claimed in claim 1, wherein the main oxygen flow control loop (301) comprises: the system comprises a first flow regulator, an oxygen flow median selector (302), an oxygen flow temperature and pressure compensator (303), a first oxygen flow meter (310), a second oxygen flow meter (311), a third oxygen flow meter (312), an oxygen thermometer (313), an oxygen pressure gauge (314), an oxygen purity setter (304), an oxygen purity limiter (305), an oxygen flow control loop multiplier (306) and an oxygen flow regulating valve (04);

the oxygen flow medium value selector (302) is connected with signals from a first oxygen flow meter (310), a second oxygen flow meter (311) and a third oxygen flow meter (312), output signals are sent to an oxygen flow temperature and pressure compensator (303), and the oxygen flow temperature and pressure compensator (303) is respectively connected with an oxygen thermometer (313), an oxygen pressure gauge (314) and the oxygen flow medium value selector (302); the oxygen flow temperature and pressure compensator (303) outputs data to an oxygen flow control loop multiplier (306) to be multiplied by an oxygen purity setter (304), and the oxygen flow control loop multiplier (306) sends the calculation result to a first flow regulator and a central oxygen proportion control module (004) of a main oxygen flow control loop (301); the main oxygen flow control loop (301) is connected with a coal slurry channel in a multi-channel burner of the coal water slurry gasification furnace (03).

8. The multi-channel coal-water slurry burner control system of claim 1, wherein the central oxygen flow control loop (401) comprises: a central oxygen flow meter (410), a fifth flow regulator, a central oxygen flow regulating valve (05), the fifth flow regulator receiving a signal from a central oxygen proportion control module (004); the central oxygen flow control loop (401) is connected with a coal slurry channel in a multi-channel burner of the coal water slurry gasification furnace (03).

Technical Field

The invention belongs to the technical field of water gas preparation, and particularly relates to a multi-channel water coal slurry burner control system.

Background

Heretofore, burners used in a single-nozzle top water spray coal slurry gasification furnace are three-channel burners, wherein each burner comprises a coal slurry channel and two oxygen channels (a central oxygen channel and an outer epoxy channel), and the oxygen-coal ratio of the burner and a gasification furnace system, the reaction temperature of the gasification furnace, the distribution of the coal slurry flow of the channel burner, the tracking of the total oxygen change and the control and restriction of the oxygen-coal ratio according to a set proportion of the central oxygen ratio, and the atomization effect of the coal-water slurry burner are poor.

Correspondingly, the control system of the three-channel burner comprises: the system comprises an oxygen-coal ratio control module, a coal slurry flow control loop, a main oxygen control loop and a central oxygen control loop. Along with the increase of the scale of the gasification furnace, the treatment capacity of the burner is increased, the atomization of the water-coal slurry burner brings difficulty, the further development and the optimization of the gasification performance of the single-nozzle top water spraying coal slurry gasification furnace are limited, the atomization effect of the water-coal slurry burner is poor, and therefore, the multi-channel water-coal slurry burner control system is of great significance to the problems.

Disclosure of Invention

The invention aims to provide a multi-channel coal water slurry burner control system, which divides a single coal slurry channel of a coal water slurry burner into two or more strands, divides a thicker single coal slurry liquid film into one or more thinner layers, effectively controls the thickness of the coal slurry liquid film, adjusts the coal slurry flow according to a set proportion and conveys the coal slurry flow into the corresponding coal slurry channel, realizes oxygen-coal ratio control and restriction through an oxygen-coal ratio control module, controls the ratio of oxygen to coal slurry, namely the oxygen-coal ratio and the gasification furnace reaction temperature within a reasonable range, controls the distribution of the coal slurry flow of the coal water slurry burner of the channel and the central oxygen ratio according to the set proportion to track the total oxygen change and the oxygen-coal ratio control and restriction, and improves the atomization effect of the burner.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention discloses a multi-channel coal water slurry burner control system which comprises a coal slurry flow summator, a coal slurry load and flow distribution control module, an oxygen-coal ratio control module, a central oxygen ratio control module, a first coal slurry flow control loop, a second coal slurry flow control loop, a main oxygen flow control loop and a central oxygen flow control loop;

the first coal slurry flow control loop, the second coal slurry flow control loop, the main oxygen flow control loop and the central oxygen flow control loop are respectively connected with a multi-channel burner on the coal slurry gasification furnace.

The coal slurry flow summator receives output signals of a first coal slurry median selector and a second coal slurry median selector on a first coal slurry flow control loop and a second coal slurry flow control loop respectively, and sends the summation calculation result of the coal slurry flow summator to an oxygen-coal ratio control module.

Further, the coal slurry load and flow distribution module comprises: the system comprises a coal slurry load setter of the gasification furnace, a coal slurry flow distribution proportion setter, a first multiplier, a second multiplier, a subtracter, a first ratio amplitude limiter and a load amplitude limiter; and the output signal ends of the first multiplier and the second multiplier are respectively connected with a first coal slurry flow control loop of the first coal slurry feeding pump and a second coal slurry flow control loop of the second coal slurry feeding pump.

Further, the oxygen-coal ratio control module comprises: the oxygen-coal ratio setting device, the second ratio amplitude limiter, the oxygen-coal ratio regulator, the first divider, the second divider, the first cross amplitude limiting module and the second cross amplitude limiting module; the oxygen-coal ratio control module is connected with signals from the coal slurry flow summator, the coal slurry load and flow distribution control module and the oxygen flow control loop multiplier, and a third multiplier;

the first cross amplitude limiting module comprises a first high selector, a first low selector and a fourth multiplier; the second cross amplitude limiting module comprises a second low selector, a second high selector and a fifth multiplier;

and the data output end of the third multiplier is connected with a first flow regulator of the main oxygen flow control loop, and the data output end of the first divider is connected with a coal slurry load and flow distribution control module through a second cross amplitude limiting module.

Further, the central oxygen ratio control module includes: a ratio setter, a limiter and a sixth multiplier; the central oxygen proportion control module is connected with a signal of an oxygen flow control loop multiplier, and a data output end of the oxygen flow control loop multiplier is connected with a second flow regulator of the central oxygen flow control loop.

Further, the first slurry flow control loop comprises: the system comprises a third flow regulator, a first coal slurry median selector, a first coal slurry flow meter, a second coal slurry flow meter, a third coal slurry flow meter, a first coal slurry feeding pump rotating speed regulator and a first coal slurry feeding pump rotating speed instrument;

the first coal slurry median selector is connected with signals of a first coal slurry flow meter, a second coal slurry flow meter and a third coal slurry flow meter, a first coal slurry feeding pump tachometer sequentially connects a rotating speed signal of a first coal slurry feeding pump to the first coal slurry median selector through a first rotating speed flow converter and a first selector, and a data output end of the first coal slurry median selector is connected with a third flow regulator of a first coal slurry flow control loop;

the output end of the third flow regulator of the first coal slurry flow control loop is connected with a first coal slurry feeding pump rotating speed regulator; the first coal slurry flow control loop is connected with one coal slurry channel in the multi-channel burner of the coal slurry gasification furnace.

Further, the second slurry flow control loop comprises: the device comprises a fourth flow regulator, a second coal slurry median selector, a fourth coal slurry flow meter, a fifth coal slurry flow meter, a sixth coal slurry flow meter, a second coal slurry feeding pump rotating speed regulator and a second coal slurry feeding pump rotating speed measuring instrument;

the second coal slurry median selector is connected with signals of a fourth coal slurry flow meter, a fifth coal slurry flow meter and a sixth coal slurry flow meter, the second coal slurry feeding pump rotating speed measuring instrument sequentially connects rotating speed signals of a second coal slurry feeding pump to the second coal slurry median selector through a second rotating speed and flow converter and a second selector, and a data output end of the second coal slurry median selector is connected with a fourth flow regulator of a second coal slurry flow control loop;

the output end of a fourth flow regulator of the second coal slurry flow control loop is connected with a rotating speed regulator of a second coal slurry feeding pump; and the second coal slurry flow control loop is connected with one coal slurry channel in the multi-channel burner of the coal slurry gasification furnace.

Further, the primary oxygen flow control loop comprises: the oxygen purification device comprises a first flow regulator, an oxygen flow median selector, an oxygen flow temperature and pressure compensator, a first oxygen flowmeter, a second oxygen flowmeter, a third oxygen flowmeter, an oxygen thermometer, an oxygen pressure gauge, an oxygen purity setter, an oxygen purity limiter, an oxygen flow control loop multiplier and an oxygen flow regulating valve;

the oxygen flow medium value selector is connected with signals from the first oxygen flow meter, the second oxygen flow meter and the third oxygen flow meter, outputs signals to the oxygen flow temperature and pressure compensator, and the oxygen flow temperature and pressure compensator is respectively connected with the oxygen thermometer, the oxygen pressure meter and the oxygen flow medium value selector; the oxygen flow temperature and pressure compensator outputs data to an oxygen flow control loop multiplier to carry out multiplication operation with an oxygen purity setter, and the oxygen flow control loop multiplier transmits an operation result to a first flow regulator and a central oxygen proportion control module of a main oxygen flow control loop; the main oxygen flow control loop is connected with a coal slurry channel in a multi-channel burner of the coal water slurry gasification furnace.

Further, the central oxygen flow control loop comprises: the central oxygen flow meter, the fifth flow regulator and the central oxygen flow regulating valve, wherein the fifth flow regulator receives signals from the central oxygen proportion control module; the central oxygen flow control loop is connected with a coal slurry channel in a multi-channel burner of the coal water slurry gasification furnace.

The invention has the following beneficial effects:

the single coal slurry channel of the coal water slurry burner is divided into two or more strands, a thicker single coal slurry liquid film is divided into one or more thinner layers, the thickness of the coal slurry liquid film is effectively controlled, the coal slurry flow is adjusted according to a set proportion and is conveyed into the corresponding coal slurry channel, the oxygen-coal ratio control and restriction are realized through the oxygen-coal ratio control module, the ratio of oxygen to the coal slurry, namely the oxygen-coal ratio, and the gasification furnace reaction temperature are controlled within a reasonable range, the distribution of the coal slurry flow of the burner of the channel is controlled, and the central oxygen ratio tracks the total oxygen change and the oxygen-coal ratio control and restriction according to the set proportion, so that the atomization effect of the coal water slurry burner is improved.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a multi-channel burner control system provided by an embodiment of the invention;

fig. 2 is a schematic structural diagram of each control module and control loop in a multi-channel burner control system according to an embodiment of the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

01-a first coal slurry feed pump, 101-a first coal slurry flow control loop, 001-a coal slurry flow summator, 102-a first coal slurry median selector, 103-a first coal slurry feed pump speed regulator, 104-a first coal slurry feed pump tachometer, 105-a first rotational speed flow converter, 106-a first selector, 110-a first coal slurry flow meter, 111-a second coal slurry flow meter, 112-a third coal slurry flow meter, 02-a second coal slurry feed pump, 002-a coal slurry load and flow distribution module, 21-a gasifier coal slurry load setter, 22-a coal slurry flow distribution proportion setter, 23-a first multiplier, 24-a second multiplier, 25-a subtracter, 26-a first ratio limiter, 27-a limiting load limiter, 201-a second coal slurry flow control loop, 202-a second coal slurry medium value selector, 203-a second coal slurry feeding pump rotating speed regulator, 204-a second coal slurry feeding pump rotating speed measuring instrument, 205-a second rotating speed flow converter, 206-a second selector, 210-a fourth coal slurry flow meter, 211-a fifth coal slurry flow meter, 212-a sixth coal slurry flow meter, a 003-oxygen-coal ratio control module, a 03-coal water slurry gasification furnace, a 31-oxygen-coal ratio setter, a 32-second ratio amplitude limiter, a 33-oxygen-coal ratio regulator, 34-a first divider, 35-a second divider, 36-a first cross amplitude limiting module, 36-1-a first high-frequency selector, 36-2-a first low-frequency selector, 36-3-a fourth multiplier, 37-a second cross amplitude limiting module, 37-1-a second low-frequency selector, 37-2-second high selector, 37-3-fifth multiplier, 38-third multiplier, 301-main oxygen flow control loop, 302-oxygen flow median selector, 303-oxygen flow temperature and pressure compensator, 304-oxygen purity setter, 305-oxygen purity limiter, 306-oxygen flow control loop multiplier, 310-first oxygen flow meter, 311-second oxygen flow meter, 312-third oxygen flow meter, 313-oxygen thermometer, 314-oxygen pressure gauge, 04-oxygen flow regulating valve, 004-central oxygen proportion control module, 401-central oxygen flow control loop, 410-central oxygen flow meter, 41-ratio setter, 42-limiter, 43-sixth multiplier.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "output signal terminal", "data output terminal", "channel", "connection", etc. indicate orientation or positional relationship, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referenced components or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Referring to fig. 1-2, the multi-channel coal water slurry burner control system of the present invention includes a coal slurry flow rate summer 001, a coal slurry load and flow rate distribution control module 002, an oxygen-coal ratio control module 003, a central oxygen ratio control module 004, a first coal slurry flow rate control loop 101, a second coal slurry flow rate control loop 201, a main oxygen flow rate control loop 301, and a central oxygen flow rate control loop 401;

the first coal slurry flow control loop 101, the second coal slurry flow control loop 201, the main oxygen flow control loop 301 and the central oxygen flow control loop 401 are respectively connected with a multi-channel burner on the coal water slurry gasification furnace 03.

The coal slurry flow summator 001 receives output signals from the first coal slurry median selector 102 and the second coal slurry median selector 202 on the first coal slurry flow control loop 101 and the second coal slurry flow control loop 201 respectively, sums the two coal slurry flows, and sends a sum calculation result of the coal slurry flow summator 001 to the oxygen-coal ratio control module 003;

the coal slurry flow summator 001 receives and sums the coal slurry flow signals of the first coal slurry flow control loop 101 and the second coal slurry flow control loop 201 respectively, and output data of the coal slurry flow summator are sent to the coal slurry load and flow distribution module 002 and the oxygen-coal ratio control module 003 respectively; the coal slurry load and flow distribution module 002 receives signals from the coal slurry flow summer 001 and the coal slurry load and flow distribution module 002, respectively, and output data of the coal slurry load and flow distribution module 002 are sent to the coal slurry flow summer 001 and the second coal slurry flow control loop 201. The oxygen-coal ratio control module 003 receives signals from the coal slurry flow summer 001 and the main oxygen flow control loop 301, and outputs data to the second coal slurry median selector 202 and the main oxygen flow control loop 301. The central oxygen ratio control module 004 receives the signal from the main oxygen flow control loop 301, and the data result is output to the central oxygen flow control loop 401.

Wherein the slurry load and flow distribution module 002 includes: a coal slurry load setter 21, a coal slurry flow distribution ratio setter 22, a first multiplier 23, a second multiplier 24, a subtracter 25, a first ratio limiter 26, and a load limiter 27; the output signal ends of the first multiplier 23 and the second multiplier 24 are respectively connected with a first coal slurry flow control loop 101 of the first coal slurry feeding pump 01 and a second coal slurry flow control loop 201 of the second coal slurry feeding pump 02;

the coal slurry load and flow distribution module 002 is responsible for controlling the setting of the total coal slurry load of the gasification furnace and distributing the coal slurry to the first coal slurry flow control loop 101 and the second coal slurry flow control loop 201 according to the set proportion; the coal slurry load and flow distribution module 002 includes setting coal slurry load control, i.e., setting total coal slurry load of the gasification furnace by the coal slurry load setting device 21 of the gasification furnace, and setting the ratio of two coal slurries by the coal slurry flow distribution ratio setting device 22 of the flow distribution setting module, i.e., controlling the liquid film thickness of the coal slurry of the multi-channel burner of the coal water slurry gasification furnace 03, so as to adjust the atomization performance and the gasification performance of the burner.

Wherein, oxygen coal ratio control module 003 includes: an oxygen-coal ratio setter 31, a second ratio limiter 32, an oxygen-coal ratio adjuster 33, a first divider 34, a second divider 35, a first cross limiting module 36 and a second cross limiting module 37; the oxygen-coal ratio control module 003 is connected with signals from the coal slurry flow summator 001, the coal slurry load and flow distribution control module 002, the oxygen flow control loop multiplier 306 and the third multiplier 38; the oxygen-coal ratio control module 003 is responsible for setting/controlling and restraining the oxygen-coal ratio of the gasification furnace, and the central oxygen ratio control module 004 is responsible for tracking and controlling the total oxygen flow by the central oxygen flow;

the first cross clipping module 36 comprises a first high selector 36-1, a first low selector 36-2, and a fourth multiplier 36-3; the second cross clipping module 37 comprises a second low selector 37-1, a second high selector 37-2 and a fifth multiplier 37-3;

the data output end of the third multiplier 38 is connected with the first flow regulator of the main oxygen flow control loop 301, and the data output end of the first divider 34 is connected with the coal slurry load and flow distribution control module 002 through the second cross amplitude limiting module 37;

the oxygen-coal ratio control module 003 is used for controlling the oxygen-coal ratio, restraining the oxygen-coal ratio, calculating a coal slurry flow control target and calculating an oxygen flow control target; the oxygen-coal ratio control means that the set value of the oxygen-coal ratio regulator 33 is set by the oxygen-coal ratio setter 31, and the second divider 35 calculates the ratio of the total oxygen flow and the total coal slurry flow as the measured value of the oxygen-coal ratio regulator 33; the oxygen-coal ratio constraint is that the cross amplitude limiting of the oxygen flow and the coal slurry flow is completed through the first cross amplitude limiting module 36 and the second cross amplitude limiting module 37, so as to ensure that: when the load of the coal slurry is increased, the coal slurry is increased firstly and then the oxygen is increased; when the coal slurry load is reduced, the oxygen is reduced firstly and then the coal slurry is reduced, so that the overoxidation of the gasification furnace is effectively avoided, the shutdown or overtemperature of the gasification furnace is further avoided, and the safe operation of the coal water slurry gasification furnace 03 is ensured; calculating a coal slurry flow control target, namely, sending the coal slurry flow control target to a coal slurry load and proportion distribution module as an operation target value of the coal slurry of the gasification furnace after the operation of the output of the oxygen-coal ratio regulator 33 and the first divider 34; the calculated oxygen flow control target is calculated by the output of the oxygen/coal ratio regulator 33 and the third multiplier 38, and then sent to the oxygen control loop as the operation target of the gasifier oxygen.

Wherein, the central oxygen proportion control module 004 includes: a ratio setter 41, a limiter 42, and a sixth multiplier 43; the central oxygen proportion control module 004 is connected with a signal of the oxygen flow control loop multiplier 306, and the data output end of the oxygen flow control loop multiplier 306 is connected with the second flow regulator of the central oxygen flow control loop 401;

the central oxygen ratio setter 41 sets the operating ratio of the central oxygen, and the operating ratio is calculated by the sixth multiplier 43 with the main flow rate to form a cascade for the central oxygen flow rate control loop. The central oxygen proportion tracks the flow change of the main oxygen when the oxygen flow changes, thereby ensuring the stability of the central oxygen proportion and effectively reducing the operating frequency of operators.

Wherein the first slurry flow control loop 101 comprises: a third flow regulator, a first coal slurry median selector 102, a first coal slurry flow meter 110, a second coal slurry flow meter 111, a third coal slurry flow meter 112), a first coal slurry feed pump rotational speed regulator 103, and a first coal slurry feed pump rotational speed meter 104; the coal slurry flow from the first coal slurry median selector 102 in the third extraction in the first coal slurry flow control loop 101 is added with the coal slurry flow from the second coal slurry median selector 202 in the third extraction in the second coal slurry flow control loop 201, so as to control the total load and the oxygen-coal ratio of the gasification furnace; wherein the first coal slurry feeding pump 01 is controlled by a frequency converter;

the first coal slurry median selector 102 is connected with signals from a first coal slurry flow meter 110, a second coal slurry flow meter 111 and a third coal slurry flow meter 112, the first coal slurry feed pump tachometer 104 sequentially connects a rotating speed signal of a first coal slurry feed pump 01 to the first coal slurry median selector 102 through a first rotating speed flow converter 105 and a first selector 106, and a data output end of the first coal slurry median selector 102 is connected with a third flow regulator of the first coal slurry flow control loop 101;

the output end of the third flow regulator of the first coal slurry flow control loop 101 is connected with a first coal slurry feeding pump rotating speed regulator 103; the first coal slurry flow control loop 101 is connected with a coal slurry channel in the multi-channel burner of the coal water slurry gasification furnace 03.

Wherein, the second coal slurry flow control loop 201 comprises: a fourth flow regulator, a second coal slurry median selector 202, a fourth coal slurry flow meter 210, a fifth coal slurry flow meter 211, a sixth coal slurry flow meter 212, a second coal slurry feed pump rotation speed regulator 103, and a second coal slurry feed pump rotation speed measuring instrument 204; wherein the second coal slurry feeding pump 02 is controlled by a frequency converter;

the second coal slurry median selector 202 is connected with signals from a fourth coal slurry flow meter 210, a fifth coal slurry flow meter 211 and a sixth coal slurry flow meter 212, the second coal slurry feed pump rotating speed measuring instrument 204 sequentially connects a rotating speed signal of the second coal slurry feed pump 02 to the second coal slurry median selector 202 through a second rotating speed and flow converter 205 and a second selector 206, and a data output end of the second coal slurry median selector 202 is connected with a fourth flow regulator of the second coal slurry flow control loop 201;

the output end of the fourth flow regulator of the second coal slurry flow control loop 201 is connected with the second coal slurry feeding pump rotating speed regulator 203; the second coal slurry flow control loop 201 is connected with one coal slurry channel in the multi-channel burner of the coal water slurry gasification furnace 03.

Wherein, the main oxygen flow control circuit 301 includes: a first flow regulator, an oxygen flow median selector 302, an oxygen flow temperature and pressure compensator 303, a first oxygen flow meter 310, a second oxygen flow meter 311, a third oxygen flow meter 312, an oxygen thermometer 313, an oxygen pressure gauge 314, an oxygen purity setter 304, an oxygen purity limiter 305, an oxygen flow control loop multiplier 306, and an oxygen flow regulating valve 04;

the oxygen flow medium value selector 302 is connected with signals from a first oxygen flowmeter 310, a second oxygen flowmeter 311 and a third oxygen flowmeter 312, output signals are sent to an oxygen flow temperature and pressure compensator 303, and the oxygen flow temperature and pressure compensator 303 is respectively connected with an oxygen thermometer 313, an oxygen pressure gauge 314 and the oxygen flow medium value selector 302; the oxygen flow temperature and pressure compensator 303 outputs data to the oxygen flow control loop multiplier 306 to be multiplied by the oxygen purity setter 304, and the oxygen flow control loop multiplier 306 sends the calculation result to the first flow regulator of the main oxygen flow control loop 301 and the central oxygen proportion control module 004; the main oxygen flow control loop 301 is connected with one coal slurry channel in the multi-channel burner of the coal water slurry gasification furnace 03.

Wherein the central oxygen flow control loop 401 comprises: a central oxygen flow meter 410, a fifth flow regulator, a central oxygen flow regulating valve 05, the fifth flow regulator receiving signals from a central oxygen proportion control module 004; the central oxygen flow control loop 401 is connected with one coal slurry channel in the multi-channel burner of the coal water slurry gasification furnace 03.

The thick single coal slurry liquid film is divided into one or more thin layers, the thickness of the coal slurry liquid film is effectively controlled, the flow of the coal slurry is adjusted according to a set proportion and is conveyed into the corresponding coal slurry channel, the oxygen-coal ratio control and restriction are realized through the oxygen-coal ratio control module, the ratio of oxygen to the coal slurry, namely the oxygen-coal ratio and the reaction temperature of the gasification furnace are controlled within a reasonable range, the distribution of the coal slurry flow of the burner nozzle of the channel and the central oxygen ratio are controlled according to the set proportion to track the total oxygen change and the oxygen-coal ratio control and restriction, and the atomization effect of the coal water slurry burner is improved.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.