Complete industrial steam temperature and pressure reduction control unit

Abstract

An industrial steam temperature and pressure reduction complete set control unit comprises a vertical temperature and pressure reduction device, a detachable heat exchanger, a temperature and pressure reduction intelligent control cabinet and a complete set unit intelligent control cabinet. The electric control valve I, the pressure gauge, the pressure sensor, the temperature sensor, the differential pressure liquid level transmitter, the desuperheater, the sprayer, the stop valve I, the check valve I, the variable-frequency pressurizing make-up pump and the Y-shaped filter I are integrated on the cooling tank; a steam outlet of the vertical temperature and pressure reducing device is connected with a primary supply side pipe of the heat exchanger; a primary return side pipe of the heat exchanger is connected with a return pipe of the drain valve device; the secondary water outlet side of the heat exchanger is connected with a heat user, and heat user return water is connected with the secondary water return side of the detachable heat exchanger. According to the system, ultrahigh-temperature and high-pressure steam is effectively utilized, and the function of reasonably utilizing the ultrahigh-temperature and high-pressure steam of heat source heat energy of the primary network is achieved; the energy-saving and environment-friendly effects are achieved, and the purpose of reducing heat energy waste is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of application of a temperature-reducing and pressure-reducing skid device under industrial steam conditions, in particular to an industrial steam temperature-reducing and pressure-reducing complete control unit. Background Art

[0002] At present, high-temperature and high-pressure industrial steam is widely used in thermal energy engineering industries such as cogeneration of urban centralized heating, long-distance heat source transmission and large-scale pressure-isolating stations. It provides primary network heat energy, converts high-temperature and high-pressure heat source medium steam into a heat source that can be used, controlled, cooled and decompressed. It is a kind of cooling and decompression skid device that provides heat source, and an energy-saving device for waste heat recovery. Existing industrial steam cooling and decompression devices usually achieve the cooling function by compressing external cooling water into water mist and then mixing it into industrial steam. This method requires industrial steam to pass through a long circulation pipeline to achieve the expected cooling effect. The cooling efficiency is low, and it is impossible to control the industrial steam from both internal and external circuits to quickly cool it down, and the cooling quality of industrial steam cannot be effectively guaranteed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an industrial steam temperature reduction and pressure reduction complete control unit, including a vertical temperature reduction and pressure reduction device, a detachable heat exchanger, a temperature reduction and pressure reduction intelligent control cabinet and a complete set of unit intelligent control cabinet, the vertical temperature reduction and pressure reduction device includes a cooling tank, and an electric regulating valve I, a pressure gauge, a pressure sensor, a temperature sensor, a differential pressure level transmitter, a desuperheater, a sprayer, a stop valve I, a check valve I, a variable frequency booster water pump, and a Y-type filter I integrated on the cooling tank, the electric regulating valve I, the pressure gauge, the pressure sensor, the temperature sensor and the differential pressure level transmitter are electrically connected to the temperature reduction and pressure reduction intelligent control cabinet; the steam outlet at the top of the vertical temperature reduction and pressure reduction device is connected to the primary supply side pipe of the detachable heat exchanger in sequence through the primary supply side temperature sensor, the primary supply side pressure sensor, and the electric regulating valve, and the primary return side pipe of the detachable heat exchanger is connected in sequence through the primary return side pressure sensor, a The secondary return side temperature sensor, steam trap, variable frequency booster water pump, check valve I, and stop valve I are connected to the return pipe of the vertical temperature reduction and pressure reduction device; the secondary water outlet side of the detachable heat exchanger is connected to the heat user radiator through the secondary supply side temperature sensor and the secondary supply side pressure sensor in sequence, and the return water of the heat user radiator is connected to the secondary return water side of the detachable heat exchanger through the secondary return side pressure sensor, the secondary return side temperature sensor, the Y-type filter III, the check valve II, and the stop valve II in sequence; the secondary water outlet side branch of the detachable heat exchanger is connected to the secondary return water side of the detachable heat exchanger through the variable frequency circulating water pump; the primary supply side temperature sensor, the primary supply side pressure sensor, the primary return side temperature sensor, the primary return side pressure sensor, the secondary supply side temperature sensor, the secondary supply side pressure sensor, the variable frequency circulating water pump, the secondary return side temperature sensor, and the secondary return side pressure sensor are electrically connected to the intelligent control cabinet of the complete set of units.

[0004] The secondary return water side branch of the detachable heat exchanger is connected to the water supply tank through the stop valve III, the water supply constant pressure sensor, the check valve III, the variable frequency constant pressure water supply pump, and the Y-type filter II in sequence; the water supply tank is provided with a magnetic flap level gauge and a water supply tank solenoid valve, and the water supply tank solenoid valve is connected to the water supply pipe.

[0005] The secondary return water side branch of the detachable heat exchanger is connected to the expansion constant pressure tank.

[0006] The water replenishment constant pressure sensor, the variable frequency constant pressure water replenishment pump, the magnetic flap level gauge, and the water replenishment tank solenoid valve are electrically connected through an expansion water replenishment constant pressure control cabinet.

[0007] Compared with the prior art, the utility model has the following advantages:

[0008] 1. In the utility model, the superheated steam is directly introduced into the bottom of the tank body for water bathing through the desuperheater and the steam evaporates into saturated steam from the water at the bottom. No matter how the inlet steam temperature and pressure change, the outlet of the desuperheater is saturated steam under the pressure, thereby reasonably, effectively and economically utilizing the ultra-high temperature and high pressure steam;

[0009] 2. The structure combining the main equipment of the desuperheater and pressure reducer with the intelligent control system and sensor instruments realizes the rational utilization of the ultra-high temperature and ultra-pressure steam of the heat source of the first-level network under different working conditions;

[0010] 3. The utility model realizes the fully automatic, unattended, reliable and stable operation of the equipment by combining the temperature and pressure reduction intelligent control cabinet, the complete set of unit intelligent control cabinet and the expansion water replenishment constant pressure control cabinet with the Internet of Things control;

[0011] 4. The utility model realizes the purpose of secondary full utilization of thermal energy through the structure combining intelligent control system, sensor instrument, circulating water pump and make-up water pump system, achieves the effect of energy saving and environmental protection, and reduces the waste of thermal energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The specific implementation modes of the present utility model are further described in detail below in conjunction with the accompanying drawings.

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] In the figure: 1—Electric regulating valve Ⅰ 2—Pressure gauge 3—Pressure sensor 4—Temperature sensor 5—Cooling tank 6—Differential pressure level transmitter 7—Desuperheater 8—Sprayer 9—Stop valve Ⅰ 10—Check valve Ⅰ 11—Variable frequency booster water supply pump 12—Y-type filter Ⅰ 13—Primary supply side temperature sensor 14—Primary supply side pressure sensor 15—Electric regulating valve Ⅱ 16—Detachable heat exchanger 17—Secondary supply side temperature sensor 18—Secondary supply side pressure sensor 19—Drain valve 20—Primary return side temperature sensor 21—Primary return side pressure sensor 22—Stop valve Ⅱ 23—Check valve Ⅱ 24—Variable frequency circulating water pump 25—Y-type filter Ⅲ 26—Secondary return side temperature sensor 27—Secondary return side pressure sensor 28—Stop valve Ⅲ 29—Water supply constant pressure sensor 30—Check valve Ⅲ 31—Variable frequency constant pressure water supply pump 32—Y-type filter Ⅱ 33—Expansion constant pressure tank 34—Magnetic flap level gauge 35—Water supply tank 36—Water supply tank solenoid valve 37—Temperature and pressure reduction intelligent control cabinet 38—Complete unit intelligent control cabinet 39—Expansion water supply constant pressure control cabinet. DETAILED DESCRIPTION

[0015] like Figure 1An industrial steam temperature and pressure reduction complete control unit, including a vertical temperature and pressure reduction device, a detachable heat exchanger 16, a temperature and pressure reduction intelligent control cabinet 37 and a complete set of unit intelligent control cabinets 38, the vertical temperature and pressure reduction device includes a cooling tank 5, and an electric regulating valve Ⅰ1 integrated on the cooling tank 5, a pressure gauge 2, a pressure sensor 3, a temperature sensor 4, a differential pressure level transmitter 6, a desuperheater 7, a sprayer 8, a stop valve Ⅰ9, a check valve Ⅰ10, a variable frequency booster water pump 11, a Y-type filter Ⅰ12, an electric The electric regulating valve Ⅰ1, the pressure gauge 2, the pressure sensor 3, the temperature sensor 4 and the differential pressure level transmitter 6 are electrically connected to the temperature reduction and pressure reduction intelligent control cabinet 37; the steam outlet at the top of the vertical temperature reduction and pressure reduction device is connected to the primary supply side pipe of the detachable heat exchanger 16 through the primary supply side temperature sensor 13, the primary supply side pressure sensor 14, and the electric regulating valve Ⅱ15 in sequence, and the primary return side pipe of the detachable heat exchanger 16 is connected through the primary return side pressure sensor 21, the primary return side temperature sensor 20, the steam trap 19 in sequence. , variable frequency booster water pump 11, check valve I10, stop valve I9 ​​are connected to the return pipe of the vertical temperature reduction and pressure reduction device; the secondary water outlet side of the detachable heat exchanger 16 is connected to the heat user radiator through the secondary supply side temperature sensor 17 and the secondary supply side pressure sensor 18 in sequence, and the return water of the heat user radiator is connected to the secondary return water side of the detachable heat exchanger 16 through the secondary return side pressure sensor 27, the secondary return side temperature sensor 26, the Y-type filter III 25, the check valve II 23, and the stop valve II 22 in sequence ; The secondary water outlet side branch of the detachable heat exchanger 16 is connected to the secondary return side of the detachable heat exchanger 16 through the variable frequency circulating water pump 24; the primary supply side temperature sensor 13, the primary supply side pressure sensor 14, the primary return side temperature sensor 20, the primary return side pressure sensor 21, the secondary supply side temperature sensor 17, the secondary supply side pressure sensor 18, the variable frequency circulating water pump 24, the secondary return side temperature sensor 26, the secondary return side pressure sensor 27 are electrically connected to the complete set of unit intelligent control cabinet 38.

[0016] The secondary return water side branch of the detachable heat exchanger 16 is connected to the water supply tank 35 through the stop valve III 28, the water supply constant pressure sensor 29, the check valve III 30, the variable frequency constant pressure water supply pump 31, and the Y-type filter II 32 in sequence; the water supply tank 35 is provided with a magnetic flap level gauge 34 and a water supply tank solenoid valve 36, and the water supply tank solenoid valve 36 is connected to the water supply pipe.

[0017] The secondary return water side branch of the detachable heat exchanger 16 is connected to the expansion constant pressure tank 33 .

[0018] The water replenishment constant pressure sensor 29 , the variable frequency constant pressure water replenishment pump 31 , the magnetic flap level gauge 34 , and the water replenishment tank solenoid valve 36 are electrically connected through an expansion water replenishment constant pressure control cabinet 39 .

[0019] When in use, first use the temperature and pressure reducer to directly let the superheated steam enter the bottom sprayer 8 of the tank body of the cooling tank 5 for water bathing, and the steam evaporates from the water at the bottom to produce saturated steam. No matter how the inlet steam temperature and pressure change, the outlet of the cooling tank 5 is saturated steam under the pressure, and the temperature and pressure are reduced to the required temperature of the detachable plate heat exchanger. The interlocking control is completed in the cooling and pressure reduction intelligent control cabinet 37 by using the steam inlet electric regulating valve 15 and the temperature sensor 13, pressure sensor 14, differential pressure liquid level transmitter 6 of the cooling tank.

[0020] Secondly, the temperature sensor on the secondary supply side of the detachable heat exchanger is used to collect the actual value of the temperature at the secondary outlet. The actual value of the temperature forms a closed-loop control with the electric regulating valve on the inlet of the detachable heat exchanger. The PID comparison operation is performed on the set value on the touch screen HMI in the complete set of intelligent control cabinets 38. When the actual display value of the temperature at the secondary outlet is greater than or less than the set value of the secondary water supply temperature, the electric regulating valve on the inlet of the detachable plate heat exchanger automatically controls the opening of the primary saturated steam inlet, thereby controlling the temperature at the secondary outlet and ensuring the reliable and stable operation of the constant temperature of the secondary water supply pipeline medium outlet. The variable frequency circulating water pump 24, the secondary supply side pressure sensor 18, and the secondary return side pressure sensor 27 are used to detect the measuring points and calculate the inlet and outlet pressure difference of the variable frequency circulating water pump 24, adjust the frequency and speed of the variable frequency circulating water pump 24 in the circulating water system, and realize the variable frequency speed control of the variable frequency circulating water pump 24 speed increase and decrease, thereby ensuring that the secondary supply side pressure is in a constant pressure state and realizing the constant pressure and constant flow at the secondary outlet in a constant state.

[0021] The replenishment of the circulation system is achieved again by utilizing the replenishment tank 35, a magnetic flap level gauge 34 installed on the side of the replenishment tank, a replenishment tank solenoid valve 36 at the inlet of the replenishment tank, an expansion constant pressure tank 33 on the replenishment pipeline, a replenishment constant pressure sensor 29 and a variable frequency constant pressure replenishment pump 31 for interlocking control, etc., which are realized in the expansion replenishment constant pressure control cabinet 39.

[0022] The utility model realizes that the pressure and temperature of the secondary network can be adjusted and controlled through the shell control system under the condition of ultra-high temperature and high pressure steam heat source under different working conditions through the structure that combines the temperature reduction and pressure reduction complete control system with the complete set of unit intelligent control system and the expansion water replenishment constant pressure control system; the utility model realizes that the complete set of unit can operate reliably and stably in full automatic unattended manner through the structure that combines the intelligent control system with control devices such as remote transmission instrument sensors, and at the same time realizes the purpose of secondary utilization of ultra-high temperature and high pressure thermal energy, achieving the effect of energy saving and environmental protection.

[0023] The above are preferred implementation modes of the present invention. Technicians in the field to which the present invention belongs can also change and modify the above implementation modes. Therefore, the present invention is not limited to the above specific implementation modes. Any obvious improvements, substitutions or modifications made by technicians in this field on the basis of the present invention belong to the protection scope of the present invention.

Claims

1. An industrial steam temperature reduction and pressure reduction complete control unit, comprising a vertical temperature reduction and pressure reduction device, a detachable heat exchanger (16), a temperature reduction and pressure reduction intelligent control cabinet (37) and a complete unit intelligent control cabinet (38), characterized in that: The vertical temperature and pressure reduction device assembly comprises a temperature reduction tank (5), and an electric regulating valve I (1), a pressure gauge (2), a pressure sensor (3), a temperature sensor (4), a differential pressure level transmitter (6), a temperature reducer (7), a sprayer (8), a stop valve I (9), a check valve I (10), a variable frequency booster water supply pump (11), and a Y-type filter I (12) integrated on the temperature reduction tank (5). The electric regulating valve I (1), the pressure gauge (2), the pressure sensor (3), the temperature sensor (4), and the differential pressure level transmitter (6) are integrated with the temperature reduction tank (5). The steam outlet at the top of the vertical temperature and pressure reduction device is connected to the primary supply side pipe of the detachable heat exchanger (16) in sequence through the primary supply side temperature sensor (13), the primary supply side pressure sensor (14), and the electric regulating valve II (15); the primary return side pipe of the detachable heat exchanger (16) is connected in sequence through the primary return side pressure sensor (21), the primary return side temperature sensor (20), the steam trap (19), the variable frequency booster water pump (11), the check valve I (10), the stop valve I ( 9) is connected to the return pipe of the vertical temperature reduction and pressure reduction device; the secondary outlet water side of the detachable heat exchanger (16) is connected to the heat user radiator through the secondary supply side temperature sensor (17) and the secondary supply side pressure sensor (18) in sequence, and the return water of the heat user radiator is connected to the secondary return water side of the detachable heat exchanger (16) through the secondary return side pressure sensor (27), the secondary return side temperature sensor (26), the Y-type filter III (25), the check valve II (23), and the stop valve II (22) in sequence; the secondary outlet water side of the detachable heat exchanger (16) is connected to the secondary return water side of the detachable heat exchanger (16) through the secondary return side pressure sensor (27), the secondary return side temperature sensor (26), the Y-type filter III (25), the check valve II (23), and the stop valve II (22) in sequence; The water side branch is connected to the secondary return side of the detachable heat exchanger (16) through a variable frequency circulating water pump (24); the primary supply side temperature sensor (13), the primary supply side pressure sensor (14), the primary return side temperature sensor (20), the primary return side pressure sensor (21), the secondary supply side temperature sensor (17), the secondary supply side pressure sensor (18), the variable frequency circulating water pump (24), the secondary return side temperature sensor (26), and the secondary return side pressure sensor (27) are electrically connected to the complete set of unit intelligent control cabinets (38).

2. The industrial steam temperature and pressure reduction complete control unit according to claim 1, characterized in that: The secondary return water branch of the detachable heat exchanger (16) is connected to a water supply tank (35) via a stop valve III (28), a water supply constant pressure sensor (29), a check valve III (30), a variable frequency constant pressure water supply pump (31), and a Y-type filter II (32) in sequence; the water supply tank (35) is provided with a magnetic flap level gauge (34) and a water supply tank electromagnetic valve (36); the water supply tank electromagnetic valve (36) is connected to a water supply pipe.

3. The industrial steam temperature and pressure reduction complete control unit according to claim 1 is characterized in that: The secondary return water side branch of the detachable heat exchanger (16) is connected to the expansion constant pressure tank (33).

4. The industrial steam temperature and pressure reduction complete control unit according to claim 2 is characterized in that: The water replenishment constant pressure sensor (29), the variable frequency constant pressure water replenishment pump (31), the magnetic flap level gauge (34), and the water replenishment tank electromagnetic valve (36) are electrically connected via an expansion water replenishment constant pressure control cabinet (39).

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