Anti-corrosion and anti-fouling system for heating system

Abstract

The present application relates to a kind of anticorrosive scale inhibition system for heating system, including heat exchanger assembled in heat exchange station, secondary network dirt separator and circulating pump, the water outlet of secondary network dirt separator is communicated with the second inlet of heat exchanger by pipeline A, circulating pump is assembled on pipeline A, still include rust removal system, pipeline B and pipeline C;Rust removal system includes anticorrosive tank, anticorrosive tank top is communicated with the water inlet of secondary network dirt separator by medicament filling pipe;Anticorrosive tank lower end side is connected to pipeline A by pipeline C;Filter is arranged in anticorrosive tank inside.The present application is by rust removal system and the parallel connection of secondary network dirt separator of heating system, utilize circulating pump to drive heating water to flow through anticorrosive tank and carry out rust removal treatment to water quality, filter is arranged in anticorrosive tank, and rust and other impurities in circulating water can be intercepted and filtered, not only alleviate the use pressure of secondary network dirt separator, also improve the water quality of circulating water, so that the medicament in circulating water can better play a role.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating system, in particular to a corrosion and scale prevention system for heating system. BACKGROUND

[0002] At present, the city residents generally adopt the central heating mode for heating. The thermal power plant sends hot water to the heating stations in each residential area and enterprise through the city high-temperature heating pipeline. In the heating station, the hot water in the high-temperature pipeline (hereinafter referred to as the primary network) exchanges heat with the hot water entering the indoor radiator or the floor coil (hereinafter referred to as the secondary network) through the heat exchanger. After the heat exchange, the hot water in the secondary network flows into each room. The hot water in the primary network flows back to the thermal power plant for re-heating.

[0003] The integrated heating station disclosed in the prior art mainly adopts the following technology: the primary heat source is sent to the heating station through the primary pipeline network, filtered by the primary network dirt separator and then enters the plate heat exchanger, and the heat of the primary heat source is exchanged to the secondary heating pipeline through the heat exchange of the plate heat exchanger. The secondary heating pipeline is led out to the heat user; the secondary water return from the heat user is filtered by the secondary network dirt separator, enters the plate heat exchanger through the variable frequency circulating pump, is heated by the high-temperature water in the primary pipeline network and then is used for heating, and the high-temperature water becomes the primary pipeline network return water after entering the plate heat exchanger and returns to the heat source to perform the heat exchange cycle of the primary and secondary whole heating system.

[0004] The existing heating secondary network water system generally uses tap water, and most of them use ion exchange softening water treatment equipment to treat the secondary network circulating water. The tap water flows through the softening water treatment equipment from the water tank, a reagent is added in the softening water treatment equipment, the tap water is treated through chemical reaction, and the water is treated by softening and then enters the water supplement pipeline to circulate in the heating system. Due to the high procurement cost of the softening water system, the salt needs to be added regularly, the power consumption is high, the raw material price is relatively high, the whole system must be regularly maintained and repaired, and the manpower and material resources investment is large. In practice, it has been gradually abandoned. In view of this problem, the patent with the authorization announcement number CN204757078U discloses an integrated heating station, which discloses that the secondary water return from the heat user is filtered by the secondary network dirt separator, enters the plate heat exchanger through the variable frequency circulating pump, and is heated by the high-temperature water in the primary pipeline network to perform heating. Moreover, in order to solve the problem of equipment corrosion caused by the idle softening water device due to the non-water loss of the system, a circulating water reagent adding machine is additionally arranged in the communication path of the secondary network dirt separator and the plate heat exchanger. The outlet of the circulating water reagent adding machine is communicated with the path through which the secondary network dirt separator flows to the plate heat exchanger. The reagent needs to be regularly introduced into the circulating water, and the reagent mixed in the circulating water flows through each pipeline and equipment, thereby reducing the possibility of corrosion of the pipeline and equipment. Although this technology solves the problem of equipment corrosion caused by the idle softening water device due to the non-water loss of the system, it still has the following technical problems:

[0005] The technology is to add the medicament directly into the circulating water, the pipeline and equipment through which the circulating water flows, the medicament forms a self-repairing protective film on the pipe wall after being slightly dissolved in the water, which prevents the corrosion of microorganisms in the water to the metal material and the fouling, and the medicament also penetrates into the rust nodule on the pipeline and equipment to make the rust nodule fall off and the pipeline and equipment clean. However, the fallen rust nodule is mixed in the circulating water, which not only affects the water quality of the circulating water, but also reduces the rust removal and corrosion prevention performance of the medicament, and the removal of the rust nodule in the circulating water can only rely on the filter of the dirt separator, which causes the use pressure of the dirt separator and further affects the heating effect. SUMMARY

[0006] The present application aims to overcome the shortcomings of the prior art, to solve the problem of poor corrosion prevention and rust removal effect of the existing heating system, and further to affect the water quality of the circulating water and increase the use pressure of the equipment.

[0007] In order to achieve the purpose of the present application, the technical scheme adopted by the present application is as follows:

[0008] The anti-corrosion and anti-fouling system for the heating system comprises a heat exchanger, a secondary network dirt separator and a circulating pump assembled in a heat exchange station, the heat exchanger is provided with a first inlet, a first outlet, a second inlet and a second outlet, the water outlet of the secondary network dirt separator is communicated with the second inlet of the heat exchanger through a pipeline A, the circulating pump is assembled on the pipeline A, and the system further comprises a rust removal system, a pipeline B and a pipeline C.

[0009] The rust removal system comprises an anti-corrosion tank, and the anti-corrosion tank is vertically placed in the heat exchange station.

[0010] The anti-corrosion tank is connected with a medicament filling pipe at the top, the inlet of the medicament filling pipe is detachably connected with one port of the pipeline B through a flange, and the other port of the pipeline B is communicated with the water inlet of the secondary network dirt separator.

[0011] The anti-corrosion tank is provided with a liquid outlet at one side of the lower end, the liquid outlet of the anti-corrosion tank is detachably connected with one port of the pipeline C through a flange, and the other port of the pipeline C is connected to the pipeline A through a tee joint.

[0012] The anti-corrosion tank is internally provided with a filter.

[0013] The present application is provided with the rust removal system and the secondary network dirt separator of the heating system in parallel, the circulating pump drives the heating water to flow through the anti-corrosion tank for rust removal treatment, the filter arranged in the anti-corrosion tank can intercept and filter the rust nodule and other impurities in the circulating water, which not only relieves the use pressure of the secondary network dirt separator, but also improves the water quality of the circulating water, the medicament in the circulating water can better play a role when the clean circulating water flows through the pipeline and equipment, the rust nodule on the wall of the heating pipeline falls off, the fouling and oxidation corrosion in the heating pipeline are prevented, and further the blockage of the pipeline and the radiator at the user end is reduced, and the heating effect is improved.

[0014] Preferably, a sewage outlet is arranged at the other side lower end of the anticorrosion tank, and a sewage valve is arranged at the sewage outlet of the anticorrosion tank, which is used for discharging accumulated water in the tank and water quality testing.

[0015] Preferably, the filter is a cylindrical steel filter screen structure matched with the inner cavity of the anticorrosion tank.

[0016] Preferably, a first valve is arranged on the pipeline A.

[0017] Preferably, a second valve is arranged on the pipeline B.

[0018] Preferably, a third valve is arranged on the pipeline C.

[0019] Preferably, the material of the anticorrosion tank is steel.

[0020] Preferably, the user end, the secondary water return pipe and the secondary water supply pipe are further included, the water inlet end of the secondary filter is connected to the user end through the secondary water return pipe, the second outlet of the heat exchanger is connected to the user end through the secondary water supply pipe, and the inlet end of the pipeline B is connected to the secondary water supply pipe through a three-way pipe.

[0021] Preferably, a fourth valve and a fifth valve are arranged on the secondary water return pipe, and a sixth valve is arranged on the secondary water supply pipe.

[0022] Compared with the prior art, the application has the beneficial effects that:

[0023] 1. The rust removal system is connected in parallel with the secondary filter of the heating system, the circulating pump drives the heating water to flow through the anticorrosion tank for rust removal treatment, the filter arranged in the anticorrosion tank can intercept and filter rust nodules and other impurities in the circulating water, which not only relieves the use pressure of the secondary filter, but also improves the water quality of the circulating water, the medicine in the circulating water can better play a role when the clean circulating water flows through the pipeline and the equipment, the rust nodules on the wall of the heating pipeline fall off, the fouling and oxidation corrosion in the heating pipeline are prevented, and thus the blockage of the pipeline and the radiator of the user end is reduced, and the heating effect is improved.

[0024] 2. The bottom side end of the tank body of the anticorrosion tank is provided with a sewage outlet, and a sewage valve is arranged at the sewage outlet, which is used for discharging accumulated water in the tank and water quality testing. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a structural schematic diagram of a heating system anticorrosion and scale inhibition system according to an embodiment of the application;

[0026] Figure 2 FIG. 2 is a structural schematic diagram of an anticorrosion tank according to an embodiment of the application.

[0027] Explanation of the labels in the diagram:

[0028] 1. Heat exchanger; 2. Secondary network filter; 3. Circulating pump; 4. Pipeline A; 401. First valve; 5. Rust removal system; 501. Corrosion protection tank; 502. Chemical dosing pipe; 503. Filter; 504. Drain valve; 6. Pipeline B; 601. Second valve; 7. Pipeline C; 701. Third valve; 1001. User end; 1002. Secondary water return pipe; 1003. Secondary water supply pipe; 1004. Fourth valve; 1005. Fifth valve; 1006. Sixth valve. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0030] Example 1

[0031] like Figure 1 As shown, this embodiment provides a corrosion and scale prevention system for a heating system. The heat exchange system of this embodiment consists of an existing heat exchange station and internal equipment. The internal equipment includes a primary network system, a corrosion and scale prevention system, and a user terminal 1001. Specifically, the primary network system includes a primary network filter, a primary water supply pipe, and a secondary heating pipe. The corrosion and scale prevention system includes a heat exchanger 1, a secondary network filter 2, a circulating pump 3, and a rust removal system 5 integrated and assembled in the heat exchange station, as well as pipes A4, B6, and C7 for connecting the equipment.

[0032] like Figure 1 As shown, the heat exchanger 1 in this embodiment is a conventional plate heat exchanger, and the heat exchanger 1 is provided with a first inlet, a first outlet, a second inlet and a second outlet;

[0033] In the primary heat source system, the primary heat source is connected to the heating station through the primary water supply pipe. It is first filtered by the primary heat source filter. The outlet of the primary heat source filter is connected to the first inlet of the heat exchanger 1. The filtered heat source enters the heat exchanger 1. Through the heat exchange of the heat exchanger 1, the heat of the primary heat source is exchanged to the secondary heating pipeline through the first outlet. The secondary heating pipeline is led out to the heat user.

[0034] The inlet of the secondary network filter 2 is connected to the user end 1001 through the secondary water return pipe 1002. The outlet of the secondary network filter 2 is connected to the second inlet of the heat exchanger 1 through the pipe A4. The first valve 401 is installed on the pipe A4. The second outlet of the heat exchanger 1 is connected to the user end 1001 through the secondary water supply pipe 1003. The circulating pump 3 is installed on the pipe A4.

[0035] like Figure 1As shown, the rust removal system 5 comprises an anticorrosion tank 501, which is vertically placed in the heat exchange station in this embodiment; the anticorrosion tank 501 is integrally connected or welded with a medicament filling pipe 502 at the top, the inlet of the medicament filling pipe 502 is detachably connected with one port of a pipeline B6 through a flange, the other port of the pipeline B6 is connected to a secondary water supply pipe 1003 through a tee pipe, and the pipeline B6 is provided with a second valve 601; one side of the lower end of the anticorrosion tank 501 is provided with a liquid outlet, the liquid outlet of the anticorrosion tank 501 is detachably connected with one port of a pipeline C7 through a flange, the other port of the pipeline C7 is connected to the pipeline A4 through a tee pipe, and the pipeline C7 is provided with a third valve 701;

[0036] As shown in the figure, Figure 2 The anticorrosion tank 501 is internally provided with a filter 503, which is a cylindrical steel filter screen structure matched with the inner cavity of the anticorrosion tank 501.

[0037] As shown in the figure, Figure 1 The secondary water return pipe 1002 of this embodiment is provided with a fourth valve 1004 and a fifth valve 1005; and the secondary water supply pipe 1003 is provided with a sixth valve 1006.

[0038] The anticorrosion tank 501 of this embodiment is made of existing DN500 steel material.

[0039] The pipeline A4, the pipeline B6 and the pipeline C7 of this embodiment are DN100 steel pipes, and the flanges used are DN100 flanges.

[0040] The first valve 401, the second valve 601, the third valve 701, the fourth valve 1004, the fifth valve 1005 and the sixth valve 1006 of this embodiment are all DN40 ball valves.

[0041] The rust removal medicament used in this embodiment is an existing silicon phosphorus crystal medicament, which is slightly soluble in water and can form a self-repairing protective film on the pipe wall to prevent microorganisms in water from corroding metal materials and causing fouling; in addition, it can also penetrate into rust nodules to make them fall off and make the pipe wall smooth.

[0042] Working Principle: This embodiment provides a corrosion and scale prevention system for a heating system. Before use, an appropriate amount of silicon phosphate crystal agent is injected into the corrosion prevention tank 501 through the agent injection pipe 502. Then, the pipe B6 is connected to the agent injection pipe 502 using a flange. Then, the system is put into use. The primary heat source is sent to the heating station through the primary network. After being filtered by the primary network filter, it enters the heat exchanger 1. Through heat exchange in the heat exchanger 1, the heat from the primary heat source is transferred to the secondary heating pipeline. The secondary heating pipeline is then led out to the heat users. The circulating pump 3, the second valve 601, the third valve 701, and the fourth valve 1004 are opened. The secondary water return from the heat users first enters through the secondary water return pipe 1002 and the pipe B6. Water enters the anti-corrosion tank 501, is filtered by the filter 503, and mixed with the silicon phosphate crystal agent in the anti-corrosion tank 501. Then, the fourth valve 1004 is closed and the fifth valve 1005 is opened. The secondary return water mixed with the agent enters the secondary screen cleaner 2. After filtration, it is treated by the rust removal system 5 to obtain clean water mixed with the agent. Then, the second valve 601, the third valve 701, and the fifth valve 1005 are closed, and the first valve 401 is opened. The circulation pump 3 pumps the clean water mixed with the agent through the pipe A4 to the heat exchanger 1. After heat exchange, it becomes high-temperature water. The sixth valve 1006 is opened, and the high-temperature water is led out through the secondary water supply pipe 1003 to the user end 1001 for user use.

[0043] This invention connects the rust removal system 5 in parallel with the secondary network filter 2 of the heating system. The circulating pump 3 drives the hot water to flow through the anti-corrosion tank 501 to remove rust. The filter 503 installed in the anti-corrosion tank 501 can trap and filter rust and other impurities in the circulating water. This not only relieves the operating pressure of the secondary network filter 2, but also improves the water quality of the circulating water. When the clean circulating water flows through the pipes and equipment, the chemicals in the circulating water can play a better role, causing the rust on the heating pipe wall to fall off, preventing scaling and oxidation corrosion in the heating pipe, thereby reducing the blockage of the pipes and the radiator at the heat user end 1001, and improving the heating effect.

[0044] Example 2

[0045] like Figure 1 As shown, the difference between this embodiment and embodiment one is that: a drain port is provided at the lower end of the other side of the anti-corrosion tank 501, and a drain valve 504 is installed at the drain port of the anti-corrosion tank 501, which can be used to drain the water accumulated in the tank and for water quality testing.

[0046] The drain valve 504 in this embodiment is a DN40 ball valve.

[0047] The embodiments of the present application disclose the preferred embodiments, but are not limited to the same. Those skilled in the art can easily understand the spirit of the present application according to the above embodiments, and make different inferences and changes, as long as they do not deviate from the spirit of the present application, and are within the protection scope of the present application.

Claims

1. A corrosion and scale prevention system for a heating system, comprising a heat exchanger, a secondary network filter, and a circulating pump installed in a heat exchange station, wherein the heat exchanger is provided with a first inlet, a first outlet, a second inlet, and a second outlet; the outlet of the secondary network filter is connected to the second inlet of the heat exchanger via pipe A; and the circulating pump is installed on pipe A, characterized in that: Further comprising a rust removal system, a pipeline B and a pipeline C; The rust removal system comprises an anticorrosion tank which is vertically placed in the heat exchange station; A medicament filling pipe is connected to the top of the anticorrosion tank, the inlet of the medicament filling pipe is detachably connected to one end of the pipeline B through a flange, and the other end of the pipeline B is communicated with the water inlet of the secondary network dirt remover; One side of the lower end of the anticorrosion tank is provided with a liquid outlet, the liquid outlet of the anticorrosion tank is detachably connected to one end of the pipeline C through a flange, and the other end of the pipeline C is connected to the pipeline A through a tee joint; A filter is arranged in the anticorrosion tank, and the filter is a cylindrical steel filter screen structure matched with the inner cavity of the anticorrosion tank; Further comprising a user end, a secondary water return pipe and a secondary water supply pipe, the water inlet end of the secondary network dirt remover is communicated to the user end through the secondary water return pipe, and the second outlet of the heat exchanger is communicated to the user end through the secondary water supply pipe; the inlet end of the pipeline B is connected to the secondary water supply pipe through a tee joint; The material of the anticorrosion tank is steel.

2. The corrosion and scale inhibition system for a heating system of claim 1, wherein: A blowdown valve is arranged at the blowdown port of the anticorrosion tank.

3. The corrosion and scale inhibition system for a heating system of claim 1, wherein: A first valve is arranged on the pipeline A.

4. The corrosion and scale inhibition system for a heating system of claim 1, wherein: A second valve is arranged on the pipeline B.

5. The corrosion and scale inhibition system for a heating system of claim 1, wherein: A third valve is arranged on the pipeline C.

6. The corrosion and scale inhibition system for a heating system of claim 1, wherein: Fourth and fifth valves are arranged on the secondary water return pipe, and a sixth valve is arranged on the secondary water supply pipe.

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