Boiler feed pump connecting structure

Abstract

The utility model belongs to a boiler feed pump connecting structure in the technical field of power plant boilers. The boiler feed pump (1) is communicated with the boiler (2), a cooling cavity is arranged in the boiler feed pump (1), the demineralized water tank (3) is communicated with a water inlet of the cooling cavity, a water outlet of the cooling cavity is communicated with a water inlet of the condenser (4), and a water outlet of the condenser (4) is communicated with the power generation system (11). According to the boiler feed pump connecting structure, scaling and blocking inside the boiler feed pump can be relieved, safe and stable operation and the service life of the feed pump are guaranteed, and the operation requirement of a power generation system is met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of power plant boiler, more specifically, relate to a boiler feed pump connecting structure. BACKGROUND

[0002] Generally, the cooling water source of the boiler feed pump of the power plant is circulating cooling water, and the circulating cooling water has high conductivity, high turbidity, high hardness and high concentration ratio, and the quality of the circulating cooling water is poor. The feedback from the waste heat power generation project site shows that the cooling water pipeline and the cooling cavity of the boiler feed pump are seriously affected by the quality of the industrial cooling water during long-term operation, resulting in serious dirt and blockage in the cooling system, cooling (mechanical seal, cooling cavity) failure and mechanical seal damage, and the safe and stable operation of the feed pump is affected.

[0003] In the prior art, a system and method for preventing steam boiler feed pump cavitation are disclosed in CN110500573A, which comprises an electrode steam boiler (1), a desalted water tank (3) and a deaerator (2). The desalted water tank is connected to the deaerator through a pipeline, and a desalted water pump (4) is arranged on the pipeline to send desalted water into the deaerator for heating and removing dissolved oxygen in the water. The deaerator is connected to the electrode steam boiler through a pipeline, and a feed pump (5) is arranged on the pipeline to send deaerated water into the electrode steam boiler. A heat exchanger (6) is arranged on the vertical section pipeline at the front end of the electrode steam boiler feed pump. The cold end of the heat exchanger is connected to the desalted water tank through a pipeline provided with a cooling water inlet valve (8), and the hot end of the heat exchanger is connected to the front end of the desalted water pump through a pipeline. The present application is simple and practical, and can effectively prevent the electrode steam boiler feed pump from cavitation.

[0004] However, the technology does not involve the technical problems and technical solutions of the present application. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problems that the prior art has the problems of complicated structure, high cost, and short service life, and provides a boiler feed pump connecting structure which has simple structure, can slow down the internal dirt and blockage of the boiler feed pump, ensures the safe and stable operation and service life of the feed pump, and meets the operation requirements of the power generation system.

[0006] To solve the above technical problems, the utility model adopts the technical scheme that

[0007] The utility model discloses a boiler feed pump connecting structure, the boiler feed pump is communicated with the boiler, and a cooling cavity is arranged in the boiler feed pump.

[0008] The boiler is communicated with one end of the boiler feed water pipe, and the boiler feed pump is installed on the boiler feed water pipe.

[0009] The desalted water tank is connected to the water inlet of the cooling cavity through a first water supply pipeline.

[0010] The water outlet of the cooling cavity of the boiler feed water pump is connected to the water inlet of the condenser through a second water supply pipeline.

[0011] A desalted water supply pump is arranged on the first water supply pipeline.

[0012] The water outlet of the condenser is connected to the power generation system through a backwater pipeline.

[0013] The boiler feed water pump and the desalted water supply pump are respectively connected to a control component.

[0014] The cooling cavity in the boiler feed water pump is in a serpentine pipeline structure.

[0015] The other end of the boiler feed water pipeline is connected to a deaerator.

[0016] The technical scheme of the utility model has the following working principle and beneficial effects:

[0017] The boiler feed water pump connecting structure has the following advantages: the boiler feed water pump is connected to a boiler, and is used for pumping deaerated water into the boiler; a cooling cavity is arranged in the boiler feed water pump, and is used for pumping circulating water into the boiler feed water pump for cooling; a desalted water tank is connected to the water inlet of the cooling cavity, so that the cooling water pumped into the boiler feed water pump is desalted water, and the desalted water has good quality and is not easy to cause scaling and blockage when passing through the cooling cavity of the boiler feed water pump, thereby ensuring long-term stable operation of the boiler feed water pump; the water outlet of the cooling cavity is connected to the water inlet of the condenser, so that the desalted water pumped out of the boiler feed water pump is pumped into the condenser as make-up water of the condenser to compensate for the loss in the steam-water circulation process of the power generation system; and the water outlet of the condenser is connected to the power generation system, and is used for the power generation system. The structure of the utility model uses desalted water to cool the boiler feed water pump, the desalted water has good quality, and the cooling water system of the feed water pump and the boiler feed water system are independent of each other and do not affect each other; desalted water is used instead of industrial cooling water with poor quality, the desalted water is not polluted by the pump body, and the desalted water is returned to the power generation system after being cooled by the feed water pump. Specifically, desalted water is used instead of industrial cooling water to cool the boiler feed water pump, and the desalted water is heated after being cooled and is then pumped into the condenser. The desalted water is used as cooling water of the boiler feed water pump to solve the problem of scaling and blockage of the pump cooling system, and is also used as make-up water of the condenser to compensate for the loss in the steam-water circulation process of the power generation system. BRIEF DESCRIPTION OF DRAWINGS

[0018] The content expressed by the drawings and the marks in the drawings of the present specification are briefly described as follows:

[0019] Figure 1 The structural diagram of the boiler feed water pump connecting structure is shown in the figure;

[0020] The marks in the figure are respectively: 1, boiler feed water pump; 2, boiler; 3, desalted water tank body; 4, condenser; 5, boiler feed water pipe; 6, first water supply pipeline; 7, second water supply pipeline; 8, desalted water make-up water pump; 9, backwater pipeline; 10, deaerator; 11, power generation system. DETAILED DESCRIPTION

[0021] The shape, structure, mutual position and connecting relationship between parts, function and working principle of each component involved in the specific implementation of the utility model are further described in detail by comparing the figures and describing the embodiments as follows:

[0022] As shown in the figure, Figure 1The utility model discloses a boiler feed pump connecting structure, boiler feed pump 1 communicates boiler 2, and the inside cooling cavity is set up to boiler feed pump 1, and the water inlet of cooling cavity communicates desalted water tank 3, and the water outlet of cooling cavity communicates condenser 4 water inlet, and condenser 4 water outlet communicates power generation system 11. The above structure, for the deficiency in the prior art, proposes the technical scheme of improvement. When setting up structure, boiler feed pump 1 communicates boiler 2, and boiler feed pump 1 is used to pump the deaerated water to the boiler, and the inside cooling cavity is set up to boiler feed pump 1, and the cooling cavity is used to send in the circulating water and cool boiler feed pump 1, and the water inlet of cooling cavity communicates desalted water tank 3, and thus, the cooling water that pumps to boiler feed pump 1 is desalted water, and the desalted water quality is good, and when cooling boiler feed pump 3, it is difficult to form the scale and the jam problem when passing through the cooling cavity of boiler feed pump 1, and the long-term stable operation of boiler feed pump 1 is ensured. The water outlet of cooling cavity communicates condenser 4 water inlet, and the desalted water that passes through boiler feed pump 1 enters condenser 4 again, and is used as the make-up water of condenser to supplement the loss amount in the steam-water circulation process of power generation system, and condenser 4 water outlet communicates power generation system 11 and is used for power generation system. The structure of the utility model, by using desalted water to cool the boiler feed pump, the desalted water quality is better, and the cooling water system of feed pump and the boiler feed system are independent, and do not affect each other, and use desalted water instead of industrial cooling water of poor water quality, and the desalted water is not polluted by the pump body, and the desalted water is cooled to the power generation system 11. Specifically, desalted water is used instead of industrial cooling water to cool the boiler feed pump 1, and the desalted water is cooled to realize temperature rise (temperature rise 2 DEG C) and then is sent into condenser 4 (condenser hot water well). The desalted water is used as the cooling water of boiler feed pump 1, solves the scale and jam problem of pump cooling system, and also can be used as the make-up water of condenser to supplement the loss amount in the steam-water circulation process of power generation system. The boiler feed pump connecting structure of the utility model has simple structure, can slow down the scale and jam inside the boiler feed pump, ensures the safe and stable operation and service life of the feed pump, and meets the operation demand of power generation system.

[0023] The boiler 2 communicates one end of the boiler feed water pipe 5, and the boiler feed pump 1 is installed on the boiler feed water pipe 5. The other end of the boiler feed water pipe 5 is connected to the deaerator 10. The above structure supplies the deaerated water formed after the treatment of the deaerator to the boiler through the boiler feed water pipe, and at the same time supplies cooling water to the boiler feed pump from the desalted water tank, so that the feed water system and the cooling system do not affect each other.

[0024] The desalted water tank 3 is connected with the water inlet of the cooling cavity through the first water supply pipeline 6.

[0025] The first water supply pipeline 6 is provided with a desalted water supply pump 8.

[0026] The water outlet of the condenser 4 is connected with the power generation system 11 through the backwater pipeline 9.

[0027] The boiler feed pump 1 and the desalted water supply pump 8 are respectively connected with control components.

[0028] The boiler feed pump 1 is connected with the boiler 2, and the boiler feed pump 1 is used for pumping deaerated water into the boiler. The cooling cavity is arranged in the boiler feed pump 1 and is used for circulating water to cool the boiler feed pump 1. The desalted water tank 3 is connected with the water inlet of the cooling cavity. Thus, the cooling water pumped into the boiler feed pump 1 is desalted water, and the desalted water has good quality and is not easy to cause scaling and blockage when passing through the cooling cavity of the boiler feed pump 1, so that the boiler feed pump 1 can be stably operated for a long time. The water outlet of the cooling cavity is connected with the water inlet of the condenser 4, and the desalted water passing through the boiler feed pump 1 enters the condenser 4 as make-up water of the condenser to compensate for the loss in the steam-water circulation process of the power generation system. The water outlet of the condenser 4 is connected with the power generation system 11 and is used for the power generation system. The structure of the utility model uses desalted water to cool the boiler feed pump, the desalted water has good quality, and the cooling water system of the boiler feed pump and the boiler feed system are independent and do not affect each other. The desalted water is not polluted by the pump body, and the desalted water is returned to the power generation system 11 after cooling the boiler feed pump. Specifically, the desalted water is used to replace industrial cooling water to cool the boiler feed pump 1, and the desalted water is heated after cooling and then enters the condenser 4 (condenser hot well). The desalted water is used as cooling water of the boiler feed pump 1 to solve the scaling and blockage problem of the pump cooling system and is used as make-up water of the condenser to compensate for the loss in the steam-water circulation process of the power generation system.

[0029] The utility model has been described above in conjunction with the drawings, obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, as long as various improvements of the method concept and technical scheme of the utility model are adopted, or the concept and technical scheme of the utility model is directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A boiler feed water pump connection structure, characterized in that: The boiler feed water pump (1) is connected to the boiler (2), a cooling cavity is provided inside the boiler feed water pump (1), the desalted water tank (3) is connected to the water inlet of the cooling cavity, the water outlet of the cooling cavity is connected to the water inlet of the condenser (4), and the water outlet of the condenser (4) is connected to the power generation system (11).

2. The boiler feed water pump connection structure according to claim 1, characterized in that: The boiler (2) is connected to one end of a boiler water supply pipe (5), and a boiler water supply pump (1) is installed on the boiler water supply pipe (5).

3. The boiler feed water pump connection structure according to claim 1 or 2, characterized in that: The desalted water tank (3) is connected to the water inlet of the cooling cavity through a first water supply pipeline (6).

4. The boiler feed water pump connection structure according to claim 1 or 2, characterized in that: The water outlet of the cooling cavity of the boiler feed water pump (1) is connected to the water inlet of the condenser (4) through a second water supply pipeline (7).

5. The boiler feed water pump connection structure according to claim 3, characterized in that: A desalted water supply pump (8) is provided on the first water supply pipeline (6).

6. The boiler feed water pump connection structure according to claim 1, characterized in that: The water outlet of the condenser (4) is connected to the power generation system (11) through a return water pipeline (9).

7. The boiler feed water pump connection structure according to claim 5, characterized in that: The boiler feed water pump (1) and the desalted water supply water pump (8) are respectively connected to the control components.

8. The boiler feed water pump connection structure according to claim 1 or 2, characterized in that: The cooling cavity inside the boiler feed water pump (1) is a serpentine pipe structure.

9. The boiler feed water pump connection structure according to claim 2, characterized in that: The other end of the boiler water supply pipe (5) is connected to a deaerator (10).

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