Boiler denitration flue inlet adjusting device

Abstract

The utility model discloses a boiler denitration flue inlet adjusting device, which relates to the technical field of boiler denitration, and comprises an equipment main body, two flue gas inlets are arranged at the lower end of the equipment main body in bilateral symmetry, and a first flue and a second flue are respectively arranged on two sides in the equipment main body. A partition plate is arranged between the first flue and the second flue, the lower end of the first flue and the lower end of the second flue are each provided with an adjusting assembly frame, each adjusting assembly frame comprises a ball screw located on one side, a rotating handle is arranged at one end of each ball screw, and a lead screw sliding block is arranged on the outer wall of each ball screw. The adjusting assembly frame further comprises a driven guide rod located on the other side, and a driven sliding block is arranged on the outer wall of the driven guide rod. The problems that in the shutdown period of an existing unit, the smoke temperature of a denitration inlet can rapidly reach the denitration ammonia spraying quit condition, the hour out-of-limit duration of uploaded NOx is affected, and unit start and stop environmental protection parameter control is seriously restricted are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler denitration technology field, concretely is a kind of boiler denitration flue inlet adjusting device. BACKGROUND

[0002] With the grim environmental protection situation, higher requirements are put forward for environmental protection parameter control, in the initial stage of unit start, denitration inlet smoke temperature cannot reach denitration ammonia injection input condition as soon as possible;

[0003] During unit shutdown, denitration inlet smoke temperature can quickly reach denitration ammonia injection exit condition, affect the uploading NOx hour over-limit time, seriously restrict unit start-stop environmental protection parameter control;

[0004] Therefore, it does not meet the existing demand, and a kind of boiler denitration flue inlet adjusting device is proposed. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of boiler denitration flue inlet adjusting device, to solve the problem that existing unit shutdown period is proposed in the above background art, denitration inlet smoke temperature can quickly reach denitration ammonia injection exit condition, affect the uploading NOx hour over-limit time, seriously restrict unit start-stop environmental protection parameter control.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of boiler denitration flue inlet adjusting device, comprising: equipment main body, the lower end of the equipment main body is symmetrically provided with two flue gas inlets, the both sides in the equipment main body are respectively provided with first flue and second flue, the first flue and second flue are provided with the baffle between, the lower end of the first flue and second flue is provided with adjusting assembly frame, the adjusting assembly frame includes the ball screw located in one side, one end of the ball screw is provided with handle, ball screw slide is provided on the outer wall of the ball screw, the adjusting assembly frame further includes the driven guide rod located in the other side, driven slide is provided on the outer wall of the driven guide rod, and the driven slide and ball screw slide are provided with flue gas baffle between.

[0007] Preferably, the rear end of the flue gas baffle is provided with a plurality of baffle sections, and the baffle sections are connected by connecting pieces.

[0008] Preferably, the rear end of the adjusting assembly frame is provided with a receiving groove, and the receiving groove and the adjusting assembly frame form an L-shaped structure, and the upper end of the receiving groove is provided with an inlet and outlet.

[0009] Preferably, the front end face of the flue gas baffle is provided with a clamping block, and the inner wall of the adjusting assembly frame is provided with a clamping groove matched with the clamping block.

[0010] Preferably, the inside of the first flue is provided with a low-temperature reheater, the inside of the second flue is provided with an economizer, and the upper side of the economizer is provided with a low-temperature superheater.

[0011] Preferably, the economizer and the lower side of the low-temperature reheater are both provided with an assembling frame.

[0012] Preferably, the upper end of the equipment body is symmetrically provided with two upper discharge openings.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1、The utility model discloses a rotating handle drives the ball screw to rotate, makes the screw block to drive the flue gas baffle to displace forward and backward, simultaneously, drives the driven slider on the driven guide rod to displace, makes the flue gas baffle have displacement adjustment function, during the start -up of unit, for improving the flue gas temperature of denitration entrance, realizes full -load to throw denitration, reduces the over -limit long of environmental protection transmission NOx, opens the flue gas baffle at low -temperature reheater place completely, closes the flue gas baffle at low -temperature superheater place to 10%, during the shutdown of unit, for improving the flue gas temperature of denitration entrance, delays the exit denitration system, reduces the over -limit long of environmental protection transmission NOx, opens the flue gas baffle at low -temperature superheater place completely, reheater flue gas baffle closes to 10%, improves the flue gas temperature of denitration entrance through the adjustment of the flue gas baffle in two flues, makes unit during the start -up and shutdown all be able to reach full -load to throw denitration system.

[0015] 2、The length of the flue gas baffle is extended through multiple baffle sections, different numbers of baffle sections are moved out of the storage slot along with different displacement distances, so that the flue gas baffle can be shielded to different degrees, in the fully open or partially open state, the baffle sections are placed in the storage slot, and in the fully closed state, the clamping blocks are inserted into the clamping grooves to realize full closure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole structure schematic view of the utility model;

[0017] Figure 2 It is an internal structure schematic view of the equipment body of the utility model;

[0018] Figure 3 It is a structure schematic view of one side of the adjusting assembly frame of the utility model;

[0019] Figure 4 It is a structure schematic view of the other side of the adjusting assembly frame of the utility model;

[0020] Figure 5 It is a storage slot structure schematic view of the utility model;

[0021] In the figure: 1, device main body; 2, flue gas inlet; 3, first flue; 4, second flue; 5, low-temperature reheater; 6, economizer; 7, low-temperature superheater; 8, upper discharge port; 9, assembly frame; 10, partition; 11, adjusting assembly frame; 12, handle; 13, ball screw; 14, screw block; 15, driven guide rod; 16, driven block; 17, flue gas baffle; 18, baffle section; 19, connecting piece; 20, storage groove; 21, inlet and outlet; 22, clamping block; 23, clamping groove. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0023] Please refer to Figures 1-5 The present application provides an embodiment: a boiler denitration flue inlet adjusting device, comprising: a device main body 1, two flue gas inlets 2 are symmetrically arranged at the lower end of the device main body 1, two upper discharge ports 8 are symmetrically arranged at the upper end of the device main body 1, a first flue 3 and a second flue 4 are arranged at the two sides inside the device main body 1, a partition 10 is arranged between the first flue 3 and the second flue 4, an adjusting assembly frame 11 is arranged at the lower end of the first flue 3 and the second flue 4, the adjusting assembly frame 11 comprises a ball screw 13 located on one side, a handle 12 is arranged at one end of the ball screw 13, a screw block 14 is arranged on the outer wall of the ball screw 13, the adjusting assembly frame 11 further comprises a driven guide rod 15 located on the other side, a driven block 16 is arranged on the outer wall of the driven guide rod 15, and a flue gas baffle 17 is arranged between the driven block 16 and the screw block 14; the handle 12 drives the ball screw 13 to rotate, so that the screw block 14 drives the flue gas baffle 17 to move forward and backward, and at the same time, the driven block 16 on the other side is driven to move on the driven guide rod 15, so that the flue gas baffle 17 has a displacement adjusting function; during the startup of the unit, in order to improve the flue gas temperature at the denitration inlet to realize full-load denitration, and to reduce the over-limit time of NOx uploaded by environmental protection, the flue gas baffle 17 at the low-temperature reheater 5 is fully opened, and the flue gas baffle 17 at the low-temperature superheater 7 is closed to 10%; during the shutdown of the unit, in order to improve the flue gas temperature at the denitration inlet to realize full-load denitration, to delay the exit from the denitration system, and to reduce the over-limit time of NOx uploaded by environmental protection, the flue gas baffle 17 at the low-temperature superheater 7 is fully opened, and the reheater flue gas baffle is closed to 10%; by adjusting the flue gas baffles 17 in the two flues, the flue gas temperature at the denitration inlet is improved, so that the unit can achieve full-load denitration during startup and shutdown;

[0024] The rear end of the smoke shielding plate 17 is provided with a plurality of shielding plate segments 18, the shielding plate segments 18 are combined and connected through connecting pieces 19, the rear end of the adjusting assembly frame 11 is provided with a receiving groove 20, and the receiving groove 20 and the adjusting assembly frame 11 form an L-shaped structure, and the upper end of the receiving groove 20 is provided with an inlet and outlet 21; the connecting pieces 19 can be hinged, the length of the smoke shielding plate 17 is extended through the plurality of shielding plate segments 18, different numbers of shielding plate segments 18 are driven to move out of the receiving groove 20 as the displacement distance is different, so that the shielding plate segments 18 can be shielded to different degrees, and in the fully open or partially open state, the shielding plate segments 18 are placed in the receiving groove 20, the shielding plate segments 18 are in and out through the inlet and outlet 21, and the shielding plate segments 18 are driven to displace through the upper lead screw displacement piece.

[0025] Please refer to Figure 4 、 Figure 5 The front end face of the smoke shielding plate 17 is provided with a clamping block 22, and a clamping groove 23 matched with the clamping block 22 is formed in the inner wall of the adjusting assembly frame 11; in the fully closed state, the clamping block 22 is inserted into the clamping groove 23, so that the whole is closed.

[0026] Please refer to Figure 2 The inside of the first flue 3 is provided with a low-temperature reheater 5, the inside of the second flue 4 is provided with a coal economizer 6, the upper side of the coal economizer 6 is provided with a low-temperature superheater 7, and the lower side of the low-temperature reheater 5 and the coal economizer 6 are provided with assembly frames 9; the reheater is used for heating the low-pressure steam that has done work and reaching a certain temperature, and the reheater is used for improving the thermal efficiency of the power plant cycle, the coal economizer 6 is a conventional supporting device installed at the lower part of the tail flue of the boiler and used for recovering the waste heat of the discharged smoke, and the main function of the low-temperature superheater 7 is to generate low-temperature superheating heat, so that the temperature of the steam is increased, the quality of the steam is improved, and the use requirement is met.

[0027] Working principle: when in use, the rotating handle 12 drives the ball screw 13 to rotate, the screw block 14 drives the smoke shielding plate 17 to displace forward and backward, and meanwhile, the driven sliding block 16 on the other side is displaced on the driven guide rod 15, so that the smoke shielding plate 17 has a displacement adjusting function; during the start of the unit, in order to improve the denitration inlet flue gas temperature to realize full-load denitration, reduce the NOx overrun time of the environmental protection, the low-temperature reheater 5 is fully opened, and the smoke shielding plate 17 at the low-temperature superheater 7 is closed to 10%; during the shutdown of the unit, in order to improve the denitration inlet flue gas temperature to realize full-load denitration, delay the exit of the denitration system, and reduce the NOx overrun time of the environmental protection, the smoke shielding plate 17 at the low-temperature superheater 7 is fully opened, and the reheater smoke shielding plate is closed to 10%; the smoke shielding plates 17 in the two flues are adjusted to improve the denitration inlet flue gas temperature.

[0028] The length of the smoke gas shielding plate 17 is prolonged by the plurality of baffle sections 18, different numbers of baffle sections 18 are driven to move out of the receiving groove 20 with different displacement distances, so that different degrees of shielding operation can be performed, in the fully open or partially open state, the baffle sections 18 are placed in the receiving groove 20, in the fully closed state, the clamping block 22 is inserted into the clamping groove 23 to achieve full closure.

[0029] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A boiler denitration flue inlet adjusting device, comprising a device main body (1), the lower end of the device main body (1) is provided with two flue gas inlets (2) symmetrically left and right, characterized in that: The device body (1) is internally provided with first flue (3) and second flue (4) on both sides, respectively, the first flue (3) and the second flue (4) are provided with a partition (10), the lower end of the first flue (3) and the second flue (4) are provided with adjusting assembly frame (11), the adjusting assembly frame (11) includes ball screw (13) on one side, one end of the ball screw (13) is provided with a handle (12), the outer wall of the ball screw (13) is provided with screw block (14), the adjusting assembly frame (11) further includes driven guide rod (15) on the other side, the outer wall of the driven guide rod (15) is provided with driven slider (16), the driven slider (16) and the screw block (14) are provided with flue gas baffle (17).

2. The boiler denitration flue inlet adjusting device according to claim 1, characterized in that: The rear end of the flue gas baffle (17) is provided with a plurality of baffle sections (18), the baffle sections (18) are combined and connected by connecting pieces (19).

3. The device according to claim 1, characterized in that: The rear end of the adjusting assembly frame (11) is provided with a receiving groove (20), and the receiving groove (20) and the adjusting assembly frame (11) form an L-shaped structure, the upper end of the receiving groove (20) is provided with an inlet and outlet (21).

4. The boiler denitration flue inlet adjusting device according to claim 1, characterized in that: The front end face of the flue gas baffle (17) is provided with a clamping block (22), the inner wall of the adjusting assembly frame (11) is provided with a clamping groove (23) matched with the clamping block (22).

5. The boiler denitration flue inlet adjusting device according to claim 1, characterized in that: The inside of the first flue (3) is provided with a low temperature reheater (5), the inside of the second flue (4) is provided with a coal economizer (6), the upper side of the coal economizer (6) is provided with a low temperature superheater (7).

6. A boiler denitration flue inlet adjusting device according to claim 5, characterized in that: The lower side of the coal economizer (6) and the low temperature reheater (5) are provided with an assembly frame (9).

7. The boiler denitration flue inlet adjusting device according to claim 1, characterized in that: The upper end of the device body (1) is provided with two upper discharge openings (8) symmetrically on both sides.

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